Remove Boost metaproject

56 files changed, 0 insertions, 12022 deletions

diff --git a/contrib/libs/backtrace/LICENSE b/contrib/libs/backtrace/LICENSE
deleted file mode 100644
index 097d2774e5..0000000000
--- a/contrib/libs/backtrace/LICENSE
+++ /dev/null
@@ -1,29 +0,0 @@
-# Copyright (C) 2012-2016 Free Software Foundation, Inc.
-
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-
-#     (1) Redistributions of source code must retain the above copyright
-#     notice, this list of conditions and the following disclaimer. 
-
-#     (2) Redistributions in binary form must reproduce the above copyright
-#     notice, this list of conditions and the following disclaimer in
-#     the documentation and/or other materials provided with the
-#     distribution.  
-    
-#     (3) The name of the author may not be used to
-#     endorse or promote products derived from this software without
-#     specific prior written permission.
-
-# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
-# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-# DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
-# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
-# IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-# POSSIBILITY OF SUCH DAMAGE.
diff --git a/contrib/libs/backtrace/README.md b/contrib/libs/backtrace/README.md
deleted file mode 100644
index c82834d174..0000000000
--- a/contrib/libs/backtrace/README.md
+++ /dev/null
@@ -1,36 +0,0 @@
-# libbacktrace
-A C library that may be linked into a C/C++ program to produce symbolic backtraces
-
-Initially written by Ian Lance Taylor <iant@golang.org>.
-
-This is version 1.0.
-It is likely that this will always be version 1.0.
-
-The libbacktrace library may be linked into a program or library and
-used to produce symbolic backtraces.
-Sample uses would be to print a detailed backtrace when an error
-occurs or to gather detailed profiling information.
-In general the functions provided by this library are async-signal-safe,
-meaning that they may be safely called from a signal handler.
-
-The libbacktrace library is provided under a BSD license.
-See the source files for the exact license text.
-
-The public functions are declared and documented in the header file
-backtrace.h, which should be #include'd by a user of the library.
-
-Building libbacktrace will generate a file backtrace-supported.h,
-which a user of the library may use to determine whether backtraces
-will work.
-See the source file backtrace-supported.h.in for the macros that it
-defines.
-
-As of October 2020, libbacktrace supports ELF, PE/COFF, Mach-O, and
-XCOFF executables with DWARF debugging information.
-In other words, it supports GNU/Linux, *BSD, macOS, Windows, and AIX.
-The library is written to make it straightforward to add support for
-other object file and debugging formats.
-
-The library relies on the C++ unwind API defined at
-https://itanium-cxx-abi.github.io/cxx-abi/abi-eh.html
-This API is provided by GCC and clang.
diff --git a/contrib/libs/backtrace/atomic.c b/contrib/libs/backtrace/atomic.c
deleted file mode 100644
index fcac485b23..0000000000
--- a/contrib/libs/backtrace/atomic.c
+++ /dev/null
@@ -1,113 +0,0 @@
-/* atomic.c -- Support for atomic functions if not present.
-   Copyright (C) 2013-2021 Free Software Foundation, Inc.
-   Written by Ian Lance Taylor, Google.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-    (1) Redistributions of source code must retain the above copyright
-    notice, this list of conditions and the following disclaimer.
-
-    (2) Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in
-    the documentation and/or other materials provided with the
-    distribution.
-
-    (3) The name of the author may not be used to
-    endorse or promote products derived from this software without
-    specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
-IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
-INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
-IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGE.  */
-
-#include "config.h"
-
-#include <sys/types.h>
-
-#include "backtrace.h"
-#include "backtrace-supported.h"
-#include "internal.h"
-
-/* This file holds implementations of the atomic functions that are
-   used if the host compiler has the sync functions but not the atomic
-   functions, as is true of versions of GCC before 4.7.  */
-
-#if !defined (HAVE_ATOMIC_FUNCTIONS) && defined (HAVE_SYNC_FUNCTIONS)
-
-/* Do an atomic load of a pointer.  */
-
-void *
-backtrace_atomic_load_pointer (void *arg)
-{
-  void **pp;
-  void *p;
-
-  pp = (void **) arg;
-  p = *pp;
-  while (!__sync_bool_compare_and_swap (pp, p, p))
-    p = *pp;
-  return p;
-}
-
-/* Do an atomic load of an int.  */
-
-int
-backtrace_atomic_load_int (int *p)
-{
-  int i;
-
-  i = *p;
-  while (!__sync_bool_compare_and_swap (p, i, i))
-    i = *p;
-  return i;
-}
-
-/* Do an atomic store of a pointer.  */
-
-void
-backtrace_atomic_store_pointer (void *arg, void *p)
-{
-  void **pp;
-  void *old;
-
-  pp = (void **) arg;
-  old = *pp;
-  while (!__sync_bool_compare_and_swap (pp, old, p))
-    old = *pp;
-}
-
-/* Do an atomic store of a size_t value.  */
-
-void
-backtrace_atomic_store_size_t (size_t *p, size_t v)
-{
-  size_t old;
-
-  old = *p;
-  while (!__sync_bool_compare_and_swap (p, old, v))
-    old = *p;
-}
-
-/* Do an atomic store of a int value.  */
-
-void
-backtrace_atomic_store_int (int *p, int v)
-{
-  size_t old;
-
-  old = *p;
-  while (!__sync_bool_compare_and_swap (p, old, v))
-    old = *p;
-}
-
-#endif
diff --git a/contrib/libs/backtrace/backtrace-supported.h b/contrib/libs/backtrace/backtrace-supported.h
deleted file mode 100644
index 1ece38888f..0000000000
--- a/contrib/libs/backtrace/backtrace-supported.h
+++ /dev/null
@@ -1,66 +0,0 @@
-/* backtrace-supported.h.in -- Whether stack backtrace is supported.
-   Copyright (C) 2012-2021 Free Software Foundation, Inc.
-   Written by Ian Lance Taylor, Google.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-    (1) Redistributions of source code must retain the above copyright
-    notice, this list of conditions and the following disclaimer.
-
-    (2) Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in
-    the documentation and/or other materials provided with the
-    distribution.
-
-    (3) The name of the author may not be used to
-    endorse or promote products derived from this software without
-    specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
-IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
-INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
-IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGE.  */
-
-/* The file backtrace-supported.h.in is used by configure to generate
-   the file backtrace-supported.h.  The file backtrace-supported.h may
-   be #include'd to see whether the backtrace library will be able to
-   get a backtrace and produce symbolic information.  */
-
-
-/* BACKTRACE_SUPPORTED will be #define'd as 1 if the backtrace library
-   should work, 0 if it will not.  Libraries may #include this to make
-   other arrangements.  */
-
-#define BACKTRACE_SUPPORTED 1
-
-/* BACKTRACE_USES_MALLOC will be #define'd as 1 if the backtrace
-   library will call malloc as it works, 0 if it will call mmap
-   instead.  This may be used to determine whether it is safe to call
-   the backtrace functions from a signal handler.  In general this
-   only applies to calls like backtrace and backtrace_pcinfo.  It does
-   not apply to backtrace_simple, which never calls malloc.  It does
-   not apply to backtrace_print, which always calls fprintf and
-   therefore malloc.  */
-
-#define BACKTRACE_USES_MALLOC 0
-
-/* BACKTRACE_SUPPORTS_THREADS will be #define'd as 1 if the backtrace
-   library is configured with threading support, 0 if not.  If this is
-   0, the threaded parameter to backtrace_create_state must be passed
-   as 0.  */
-
-#define BACKTRACE_SUPPORTS_THREADS 1
-
-/* BACKTRACE_SUPPORTS_DATA will be #defined'd as 1 if the backtrace_syminfo
-   will work for variables.  It will always work for functions.  */
-
-#define BACKTRACE_SUPPORTS_DATA 1
diff --git a/contrib/libs/backtrace/backtrace.c b/contrib/libs/backtrace/backtrace.c
deleted file mode 100644
index 7b62900852..0000000000
--- a/contrib/libs/backtrace/backtrace.c
+++ /dev/null
@@ -1,129 +0,0 @@
-/* backtrace.c -- Entry point for stack backtrace library.
-   Copyright (C) 2012-2021 Free Software Foundation, Inc.
-   Written by Ian Lance Taylor, Google.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-    (1) Redistributions of source code must retain the above copyright
-    notice, this list of conditions and the following disclaimer.
-
-    (2) Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in
-    the documentation and/or other materials provided with the
-    distribution.
-
-    (3) The name of the author may not be used to
-    endorse or promote products derived from this software without
-    specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
-IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
-INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
-IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGE.  */
-
-#include "config.h"
-
-#include <sys/types.h>
-
-#include "unwind.h"
-#include "backtrace.h"
-#include "internal.h"
-
-/* The main backtrace_full routine.  */
-
-/* Data passed through _Unwind_Backtrace.  */
-
-struct backtrace_data
-{
-  /* Number of frames to skip.  */
-  int skip;
-  /* Library state.  */
-  struct backtrace_state *state;
-  /* Callback routine.  */
-  backtrace_full_callback callback;
-  /* Error callback routine.  */
-  backtrace_error_callback error_callback;
-  /* Data to pass to callback routines.  */
-  void *data;
-  /* Value to return from backtrace_full.  */
-  int ret;
-  /* Whether there is any memory available.  */
-  int can_alloc;
-};
-
-/* Unwind library callback routine.  This is passed to
-   _Unwind_Backtrace.  */
-
-static _Unwind_Reason_Code
-unwind (struct _Unwind_Context *context, void *vdata)
-{
-  struct backtrace_data *bdata = (struct backtrace_data *) vdata;
-  uintptr_t pc;
-  int ip_before_insn = 0;
-
-#ifdef HAVE_GETIPINFO
-  pc = _Unwind_GetIPInfo (context, &ip_before_insn);
-#else
-  pc = _Unwind_GetIP (context);
-#endif
-
-  if (bdata->skip > 0)
-    {
-      --bdata->skip;
-      return _URC_NO_REASON;
-    }
-
-  if (!ip_before_insn)
-    --pc;
-
-  if (!bdata->can_alloc)
-    bdata->ret = bdata->callback (bdata->data, pc, NULL, 0, NULL);
-  else
-    bdata->ret = backtrace_pcinfo (bdata->state, pc, bdata->callback,
-				   bdata->error_callback, bdata->data);
-  if (bdata->ret != 0)
-    return _URC_END_OF_STACK;
-
-  return _URC_NO_REASON;
-}
-
-/* Get a stack backtrace.  */
-
-int __attribute__((noinline))
-backtrace_full (struct backtrace_state *state, int skip,
-		backtrace_full_callback callback,
-		backtrace_error_callback error_callback, void *data)
-{
-  struct backtrace_data bdata;
-  void *p;
-
-  bdata.skip = skip + 1;
-  bdata.state = state;
-  bdata.callback = callback;
-  bdata.error_callback = error_callback;
-  bdata.data = data;
-  bdata.ret = 0;
-
-  /* If we can't allocate any memory at all, don't try to produce
-     file/line information.  */
-  p = backtrace_alloc (state, 4096, NULL, NULL);
-  if (p == NULL)
-    bdata.can_alloc = 0;
-  else
-    {
-      backtrace_free (state, p, 4096, NULL, NULL);
-      bdata.can_alloc = 1;
-    }
-
-  _Unwind_Backtrace (unwind, &bdata);
-  return bdata.ret;
-}
diff --git a/contrib/libs/backtrace/backtrace.h b/contrib/libs/backtrace/backtrace.h
deleted file mode 100644
index 69cea4ca1e..0000000000
--- a/contrib/libs/backtrace/backtrace.h
+++ /dev/null
@@ -1,189 +0,0 @@
-/* backtrace.h -- Public header file for stack backtrace library.
-   Copyright (C) 2012-2021 Free Software Foundation, Inc.
-   Written by Ian Lance Taylor, Google.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-    (1) Redistributions of source code must retain the above copyright
-    notice, this list of conditions and the following disclaimer.
-
-    (2) Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in
-    the documentation and/or other materials provided with the
-    distribution.
-
-    (3) The name of the author may not be used to
-    endorse or promote products derived from this software without
-    specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
-IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
-INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
-IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGE.  */
-
-#ifndef BACKTRACE_H
-#define BACKTRACE_H
-
-#include <stddef.h>
-#include <stdint.h>
-#include <stdio.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* The backtrace state.  This struct is intentionally not defined in
-   the public interface.  */
-
-struct backtrace_state;
-
-/* The type of the error callback argument to backtrace functions.
-   This function, if not NULL, will be called for certain error cases.
-   The DATA argument is passed to the function that calls this one.
-   The MSG argument is an error message.  The ERRNUM argument, if
-   greater than 0, holds an errno value.  The MSG buffer may become
-   invalid after this function returns.
-
-   As a special case, the ERRNUM argument will be passed as -1 if no
-   debug info can be found for the executable, or if the debug info
-   exists but has an unsupported version, but the function requires
-   debug info (e.g., backtrace_full, backtrace_pcinfo).  The MSG in
-   this case will be something along the lines of "no debug info".
-   Similarly, ERRNUM will be passed as -1 if there is no symbol table,
-   but the function requires a symbol table (e.g., backtrace_syminfo).
-   This may be used as a signal that some other approach should be
-   tried.  */
-
-typedef void (*backtrace_error_callback) (void *data, const char *msg,
-					  int errnum);
-
-/* Create state information for the backtrace routines.  This must be
-   called before any of the other routines, and its return value must
-   be passed to all of the other routines.  FILENAME is the path name
-   of the executable file; if it is NULL the library will try
-   system-specific path names.  If not NULL, FILENAME must point to a
-   permanent buffer.  If THREADED is non-zero the state may be
-   accessed by multiple threads simultaneously, and the library will
-   use appropriate atomic operations.  If THREADED is zero the state
-   may only be accessed by one thread at a time.  This returns a state
-   pointer on success, NULL on error.  If an error occurs, this will
-   call the ERROR_CALLBACK routine.
-
-   Calling this function allocates resources that cannot be freed.
-   There is no backtrace_free_state function.  The state is used to
-   cache information that is expensive to recompute.  Programs are
-   expected to call this function at most once and to save the return
-   value for all later calls to backtrace functions.  */
-
-extern struct backtrace_state *backtrace_create_state (
-    const char *filename, int threaded,
-    backtrace_error_callback error_callback, void *data);
-
-/* The type of the callback argument to the backtrace_full function.
-   DATA is the argument passed to backtrace_full.  PC is the program
-   counter.  FILENAME is the name of the file containing PC, or NULL
-   if not available.  LINENO is the line number in FILENAME containing
-   PC, or 0 if not available.  FUNCTION is the name of the function
-   containing PC, or NULL if not available.  This should return 0 to
-   continuing tracing.  The FILENAME and FUNCTION buffers may become
-   invalid after this function returns.  */
-
-typedef int (*backtrace_full_callback) (void *data, uintptr_t pc,
-					const char *filename, int lineno,
-					const char *function);
-
-/* Get a full stack backtrace.  SKIP is the number of frames to skip;
-   passing 0 will start the trace with the function calling
-   backtrace_full.  DATA is passed to the callback routine.  If any
-   call to CALLBACK returns a non-zero value, the stack backtrace
-   stops, and backtrace returns that value; this may be used to limit
-   the number of stack frames desired.  If all calls to CALLBACK
-   return 0, backtrace returns 0.  The backtrace_full function will
-   make at least one call to either CALLBACK or ERROR_CALLBACK.  This
-   function requires debug info for the executable.  */
-
-extern int backtrace_full (struct backtrace_state *state, int skip,
-			   backtrace_full_callback callback,
-			   backtrace_error_callback error_callback,
-			   void *data);
-
-/* The type of the callback argument to the backtrace_simple function.
-   DATA is the argument passed to simple_backtrace.  PC is the program
-   counter.  This should return 0 to continue tracing.  */
-
-typedef int (*backtrace_simple_callback) (void *data, uintptr_t pc);
-
-/* Get a simple backtrace.  SKIP is the number of frames to skip, as
-   in backtrace.  DATA is passed to the callback routine.  If any call
-   to CALLBACK returns a non-zero value, the stack backtrace stops,
-   and backtrace_simple returns that value.  Otherwise
-   backtrace_simple returns 0.  The backtrace_simple function will
-   make at least one call to either CALLBACK or ERROR_CALLBACK.  This
-   function does not require any debug info for the executable.  */
-
-extern int backtrace_simple (struct backtrace_state *state, int skip,
-			     backtrace_simple_callback callback,
-			     backtrace_error_callback error_callback,
-			     void *data);
-
-/* Print the current backtrace in a user readable format to a FILE.
-   SKIP is the number of frames to skip, as in backtrace_full.  Any
-   error messages are printed to stderr.  This function requires debug
-   info for the executable.  */
-
-extern void backtrace_print (struct backtrace_state *state, int skip, FILE *);
-
-/* Given PC, a program counter in the current program, call the
-   callback function with filename, line number, and function name
-   information.  This will normally call the callback function exactly
-   once.  However, if the PC happens to describe an inlined call, and
-   the debugging information contains the necessary information, then
-   this may call the callback function multiple times.  This will make
-   at least one call to either CALLBACK or ERROR_CALLBACK.  This
-   returns the first non-zero value returned by CALLBACK, or 0.  */
-
-extern int backtrace_pcinfo (struct backtrace_state *state, uintptr_t pc,
-			     backtrace_full_callback callback,
-			     backtrace_error_callback error_callback,
-			     void *data);
-
-/* The type of the callback argument to backtrace_syminfo.  DATA and
-   PC are the arguments passed to backtrace_syminfo.  SYMNAME is the
-   name of the symbol for the corresponding code.  SYMVAL is the
-   value and SYMSIZE is the size of the symbol.  SYMNAME will be NULL
-   if no error occurred but the symbol could not be found.  */
-
-typedef void (*backtrace_syminfo_callback) (void *data, uintptr_t pc,
-					    const char *symname,
-					    uintptr_t symval,
-					    uintptr_t symsize);
-
-/* Given ADDR, an address or program counter in the current program,
-   call the callback information with the symbol name and value
-   describing the function or variable in which ADDR may be found.
-   This will call either CALLBACK or ERROR_CALLBACK exactly once.
-   This returns 1 on success, 0 on failure.  This function requires
-   the symbol table but does not require the debug info.  Note that if
-   the symbol table is present but ADDR could not be found in the
-   table, CALLBACK will be called with a NULL SYMNAME argument.
-   Returns 1 on success, 0 on error.  */
-
-extern int backtrace_syminfo (struct backtrace_state *state, uintptr_t addr,
-			      backtrace_syminfo_callback callback,
-			      backtrace_error_callback error_callback,
-			      void *data);
-
-#ifdef __cplusplus
-} /* End extern "C".  */
-#endif
-
-#endif
diff --git a/contrib/libs/backtrace/config-armv7a.h b/contrib/libs/backtrace/config-armv7a.h
deleted file mode 100644
index 2e036a2b5e..0000000000
--- a/contrib/libs/backtrace/config-armv7a.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#include "config-linux.h"
-#undef HAVE_GETIPINFO
diff --git a/contrib/libs/backtrace/config-linux.h b/contrib/libs/backtrace/config-linux.h
deleted file mode 100644
index 8cec45b181..0000000000
--- a/contrib/libs/backtrace/config-linux.h
+++ /dev/null
@@ -1,173 +0,0 @@
-/* config.h.  Generated from config.h.in by configure.  */
-/* config.h.in.  Generated from configure.ac by autoheader.  */
-
-/* ELF size: 32 or 64 */
-#define BACKTRACE_ELF_SIZE 64
-
-/* XCOFF size: 32 or 64 */
-#define BACKTRACE_XCOFF_SIZE unused
-
-/* Define to 1 if you have the __atomic functions */
-#define HAVE_ATOMIC_FUNCTIONS 1
-
-/* Define to 1 if you have the `clock_gettime' function. */
-#define HAVE_CLOCK_GETTIME 1
-
-/* Define to 1 if you have the declaration of `getpagesize', and to 0 if you
-   don't. */
-#define HAVE_DECL_GETPAGESIZE 1
-
-/* Define to 1 if you have the declaration of `strnlen', and to 0 if you
-   don't. */
-#define HAVE_DECL_STRNLEN 1
-
-/* Define to 1 if you have the <dlfcn.h> header file. */
-#define HAVE_DLFCN_H 1
-
-/* Define if dl_iterate_phdr is available. */
-#define HAVE_DL_ITERATE_PHDR 1
-
-/* Define to 1 if you have the fcntl function */
-#define HAVE_FCNTL 1
-
-/* Define if getexecname is available. */
-/* #undef HAVE_GETEXECNAME */
-
-/* Define if _Unwind_GetIPInfo is available. */
-#define HAVE_GETIPINFO 1
-
-/* Define to 1 if you have the <inttypes.h> header file. */
-#define HAVE_INTTYPES_H 1
-
-/* Define to 1 if you have KERN_PROC and KERN_PROC_PATHNAME in <sys/sysctl.h>.
-   */
-/* #undef HAVE_KERN_PROC */
-
-/* Define to 1 if you have KERN_PROCARGS and KERN_PROC_PATHNAME in
-   <sys/sysctl.h>. */
-/* #undef HAVE_KERN_PROC_ARGS */
-
-/* Define if -llzma is available. */
-/* #undef HAVE_LIBLZMA */
-
-/* Define to 1 if you have the <link.h> header file. */
-#define HAVE_LINK_H 1
-
-/* Define if AIX loadquery is available. */
-/* #undef HAVE_LOADQUERY */
-
-/* Define to 1 if you have the `lstat' function. */
-#define HAVE_LSTAT 1
-
-/* Define to 1 if you have the <mach-o/dyld.h> header file. */
-/* #undef HAVE_MACH_O_DYLD_H */
-
-/* Define to 1 if you have the <memory.h> header file. */
-#define HAVE_MEMORY_H 1
-
-/* Define to 1 if you have the `readlink' function. */
-#define HAVE_READLINK 1
-
-/* Define to 1 if you have the <stdint.h> header file. */
-#define HAVE_STDINT_H 1
-
-/* Define to 1 if you have the <stdlib.h> header file. */
-#define HAVE_STDLIB_H 1
-
-/* Define to 1 if you have the <strings.h> header file. */
-#define HAVE_STRINGS_H 1
-
-/* Define to 1 if you have the <string.h> header file. */
-#define HAVE_STRING_H 1
-
-/* Define to 1 if you have the __sync functions */
-#define HAVE_SYNC_FUNCTIONS 1
-
-/* Define to 1 if you have the <sys/ldr.h> header file. */
-/* #undef HAVE_SYS_LDR_H */
-
-/* Define to 1 if you have the <sys/link.h> header file. */
-/* #undef HAVE_SYS_LINK_H */
-
-/* Define to 1 if you have the <sys/mman.h> header file. */
-#define HAVE_SYS_MMAN_H 1
-
-/* Define to 1 if you have the <sys/stat.h> header file. */
-#define HAVE_SYS_STAT_H 1
-
-/* Define to 1 if you have the <sys/types.h> header file. */
-#define HAVE_SYS_TYPES_H 1
-
-/* Define to 1 if you have the <unistd.h> header file. */
-#define HAVE_UNISTD_H 1
-
-/* Define if -lz is available. */
-/* #undef HAVE_ZLIB */
-
-/* Define to the sub-directory in which libtool stores uninstalled libraries.
-   */
-#define LT_OBJDIR ".libs/"
-
-/* Define to the address where bug reports for this package should be sent. */
-#define PACKAGE_BUGREPORT ""
-
-/* Define to the full name of this package. */
-#define PACKAGE_NAME "package-unused"
-
-/* Define to the full name and version of this package. */
-#define PACKAGE_STRING "package-unused version-unused"
-
-/* Define to the one symbol short name of this package. */
-#define PACKAGE_TARNAME "libbacktrace"
-
-/* Define to the home page for this package. */
-#define PACKAGE_URL ""
-
-/* Define to the version of this package. */
-#define PACKAGE_VERSION "version-unused"
-
-/* Define to 1 if you have the ANSI C header files. */
-#define STDC_HEADERS 1
-
-/* Enable extensions on AIX 3, Interix.  */
-#ifndef _ALL_SOURCE
-# define _ALL_SOURCE 1
-#endif
-/* Enable GNU extensions on systems that have them.  */
-#ifndef _GNU_SOURCE
-# define _GNU_SOURCE 1
-#endif
-/* Enable threading extensions on Solaris.  */
-#ifndef _POSIX_PTHREAD_SEMANTICS
-# define _POSIX_PTHREAD_SEMANTICS 1
-#endif
-/* Enable extensions on HP NonStop.  */
-#ifndef _TANDEM_SOURCE
-# define _TANDEM_SOURCE 1
-#endif
-/* Enable general extensions on Solaris.  */
-#ifndef __EXTENSIONS__
-# define __EXTENSIONS__ 1
-#endif
-
-
-/* Enable large inode numbers on Mac OS X 10.5.  */
-#ifndef _DARWIN_USE_64_BIT_INODE
-# define _DARWIN_USE_64_BIT_INODE 1
-#endif
-
-/* Number of bits in a file offset, on hosts where this is settable. */
-/* #undef _FILE_OFFSET_BITS */
-
-/* Define for large files, on AIX-style hosts. */
-/* #undef _LARGE_FILES */
-
-/* Define to 1 if on MINIX. */
-/* #undef _MINIX */
-
-/* Define to 2 if the system does not provide POSIX.1 features except with
-   this defined. */
-/* #undef _POSIX_1_SOURCE */
-
-/* Define to 1 if you need to in order for `stat' and other things to work. */
-/* #undef _POSIX_SOURCE */
diff --git a/contrib/libs/backtrace/config-osx.h b/contrib/libs/backtrace/config-osx.h
deleted file mode 100644
index ab7295ea4c..0000000000
--- a/contrib/libs/backtrace/config-osx.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-#include "config-linux.h"
-
-/* Set the defines to use dyld instead of ld on macOS */
-#undef HAVE_DL_ITERATE_PHDR
-#undef HAVE_LINK_H
-#define HAVE_MACH_O_DYLD_H 1
diff --git a/contrib/libs/backtrace/config.h b/contrib/libs/backtrace/config.h
deleted file mode 100644
index 44ded9375a..0000000000
--- a/contrib/libs/backtrace/config.h
+++ /dev/null
@@ -1,11 +0,0 @@
-#pragma once
-
-#if defined(__APPLE__)
-#   include "config-osx.h"
-#else
-#   include "config-linux.h"
-#endif
-
-#if defined(__arm__) || defined(__ARM__)
-#   include "config-armv7a.h"
-#endif
diff --git a/contrib/libs/backtrace/dwarf.c b/contrib/libs/backtrace/dwarf.c
deleted file mode 100644
index 5b2724e6a7..0000000000
--- a/contrib/libs/backtrace/dwarf.c
+++ /dev/null
@@ -1,4402 +0,0 @@
-/* dwarf.c -- Get file/line information from DWARF for backtraces.
-   Copyright (C) 2012-2021 Free Software Foundation, Inc.
-   Written by Ian Lance Taylor, Google.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-    (1) Redistributions of source code must retain the above copyright
-    notice, this list of conditions and the following disclaimer.
-
-    (2) Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in
-    the documentation and/or other materials provided with the
-    distribution.
-
-    (3) The name of the author may not be used to
-    endorse or promote products derived from this software without
-    specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
-IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
-INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
-IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGE.  */
-
-#include "config.h"
-
-#include <errno.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/types.h>
-
-#include "filenames.h"
-
-#include "backtrace.h"
-#include "internal.h"
-
-/* DWARF constants.  */
-
-enum dwarf_tag {
-  DW_TAG_entry_point = 0x3,
-  DW_TAG_compile_unit = 0x11,
-  DW_TAG_inlined_subroutine = 0x1d,
-  DW_TAG_subprogram = 0x2e,
-  DW_TAG_skeleton_unit = 0x4a,
-};
-
-enum dwarf_form {
-  DW_FORM_addr = 0x01,
-  DW_FORM_block2 = 0x03,
-  DW_FORM_block4 = 0x04,
-  DW_FORM_data2 = 0x05,
-  DW_FORM_data4 = 0x06,
-  DW_FORM_data8 = 0x07,
-  DW_FORM_string = 0x08,
-  DW_FORM_block = 0x09,
-  DW_FORM_block1 = 0x0a,
-  DW_FORM_data1 = 0x0b,
-  DW_FORM_flag = 0x0c,
-  DW_FORM_sdata = 0x0d,
-  DW_FORM_strp = 0x0e,
-  DW_FORM_udata = 0x0f,
-  DW_FORM_ref_addr = 0x10,
-  DW_FORM_ref1 = 0x11,
-  DW_FORM_ref2 = 0x12,
-  DW_FORM_ref4 = 0x13,
-  DW_FORM_ref8 = 0x14,
-  DW_FORM_ref_udata = 0x15,
-  DW_FORM_indirect = 0x16,
-  DW_FORM_sec_offset = 0x17,
-  DW_FORM_exprloc = 0x18,
-  DW_FORM_flag_present = 0x19,
-  DW_FORM_ref_sig8 = 0x20,
-  DW_FORM_strx = 0x1a,
-  DW_FORM_addrx = 0x1b,
-  DW_FORM_ref_sup4 = 0x1c,
-  DW_FORM_strp_sup = 0x1d,
-  DW_FORM_data16 = 0x1e,
-  DW_FORM_line_strp = 0x1f,
-  DW_FORM_implicit_const = 0x21,
-  DW_FORM_loclistx = 0x22,
-  DW_FORM_rnglistx = 0x23,
-  DW_FORM_ref_sup8 = 0x24,
-  DW_FORM_strx1 = 0x25,
-  DW_FORM_strx2 = 0x26,
-  DW_FORM_strx3 = 0x27,
-  DW_FORM_strx4 = 0x28,
-  DW_FORM_addrx1 = 0x29,
-  DW_FORM_addrx2 = 0x2a,
-  DW_FORM_addrx3 = 0x2b,
-  DW_FORM_addrx4 = 0x2c,
-  DW_FORM_GNU_addr_index = 0x1f01,
-  DW_FORM_GNU_str_index = 0x1f02,
-  DW_FORM_GNU_ref_alt = 0x1f20,
-  DW_FORM_GNU_strp_alt = 0x1f21
-};
-
-enum dwarf_attribute {
-  DW_AT_sibling = 0x01,
-  DW_AT_location = 0x02,
-  DW_AT_name = 0x03,
-  DW_AT_ordering = 0x09,
-  DW_AT_subscr_data = 0x0a,
-  DW_AT_byte_size = 0x0b,
-  DW_AT_bit_offset = 0x0c,
-  DW_AT_bit_size = 0x0d,
-  DW_AT_element_list = 0x0f,
-  DW_AT_stmt_list = 0x10,
-  DW_AT_low_pc = 0x11,
-  DW_AT_high_pc = 0x12,
-  DW_AT_language = 0x13,
-  DW_AT_member = 0x14,
-  DW_AT_discr = 0x15,
-  DW_AT_discr_value = 0x16,
-  DW_AT_visibility = 0x17,
-  DW_AT_import = 0x18,
-  DW_AT_string_length = 0x19,
-  DW_AT_common_reference = 0x1a,
-  DW_AT_comp_dir = 0x1b,
-  DW_AT_const_value = 0x1c,
-  DW_AT_containing_type = 0x1d,
-  DW_AT_default_value = 0x1e,
-  DW_AT_inline = 0x20,
-  DW_AT_is_optional = 0x21,
-  DW_AT_lower_bound = 0x22,
-  DW_AT_producer = 0x25,
-  DW_AT_prototyped = 0x27,
-  DW_AT_return_addr = 0x2a,
-  DW_AT_start_scope = 0x2c,
-  DW_AT_bit_stride = 0x2e,
-  DW_AT_upper_bound = 0x2f,
-  DW_AT_abstract_origin = 0x31,
-  DW_AT_accessibility = 0x32,
-  DW_AT_address_class = 0x33,
-  DW_AT_artificial = 0x34,
-  DW_AT_base_types = 0x35,
-  DW_AT_calling_convention = 0x36,
-  DW_AT_count = 0x37,
-  DW_AT_data_member_location = 0x38,
-  DW_AT_decl_column = 0x39,
-  DW_AT_decl_file = 0x3a,
-  DW_AT_decl_line = 0x3b,
-  DW_AT_declaration = 0x3c,
-  DW_AT_discr_list = 0x3d,
-  DW_AT_encoding = 0x3e,
-  DW_AT_external = 0x3f,
-  DW_AT_frame_base = 0x40,
-  DW_AT_friend = 0x41,
-  DW_AT_identifier_case = 0x42,
-  DW_AT_macro_info = 0x43,
-  DW_AT_namelist_items = 0x44,
-  DW_AT_priority = 0x45,
-  DW_AT_segment = 0x46,
-  DW_AT_specification = 0x47,
-  DW_AT_static_link = 0x48,
-  DW_AT_type = 0x49,
-  DW_AT_use_location = 0x4a,
-  DW_AT_variable_parameter = 0x4b,
-  DW_AT_virtuality = 0x4c,
-  DW_AT_vtable_elem_location = 0x4d,
-  DW_AT_allocated = 0x4e,
-  DW_AT_associated = 0x4f,
-  DW_AT_data_location = 0x50,
-  DW_AT_byte_stride = 0x51,
-  DW_AT_entry_pc = 0x52,
-  DW_AT_use_UTF8 = 0x53,
-  DW_AT_extension = 0x54,
-  DW_AT_ranges = 0x55,
-  DW_AT_trampoline = 0x56,
-  DW_AT_call_column = 0x57,
-  DW_AT_call_file = 0x58,
-  DW_AT_call_line = 0x59,
-  DW_AT_description = 0x5a,
-  DW_AT_binary_scale = 0x5b,
-  DW_AT_decimal_scale = 0x5c,
-  DW_AT_small = 0x5d,
-  DW_AT_decimal_sign = 0x5e,
-  DW_AT_digit_count = 0x5f,
-  DW_AT_picture_string = 0x60,
-  DW_AT_mutable = 0x61,
-  DW_AT_threads_scaled = 0x62,
-  DW_AT_explicit = 0x63,
-  DW_AT_object_pointer = 0x64,
-  DW_AT_endianity = 0x65,
-  DW_AT_elemental = 0x66,
-  DW_AT_pure = 0x67,
-  DW_AT_recursive = 0x68,
-  DW_AT_signature = 0x69,
-  DW_AT_main_subprogram = 0x6a,
-  DW_AT_data_bit_offset = 0x6b,
-  DW_AT_const_expr = 0x6c,
-  DW_AT_enum_class = 0x6d,
-  DW_AT_linkage_name = 0x6e,
-  DW_AT_string_length_bit_size = 0x6f,
-  DW_AT_string_length_byte_size = 0x70,
-  DW_AT_rank = 0x71,
-  DW_AT_str_offsets_base = 0x72,
-  DW_AT_addr_base = 0x73,
-  DW_AT_rnglists_base = 0x74,
-  DW_AT_dwo_name = 0x76,
-  DW_AT_reference = 0x77,
-  DW_AT_rvalue_reference = 0x78,
-  DW_AT_macros = 0x79,
-  DW_AT_call_all_calls = 0x7a,
-  DW_AT_call_all_source_calls = 0x7b,
-  DW_AT_call_all_tail_calls = 0x7c,
-  DW_AT_call_return_pc = 0x7d,
-  DW_AT_call_value = 0x7e,
-  DW_AT_call_origin = 0x7f,
-  DW_AT_call_parameter = 0x80,
-  DW_AT_call_pc = 0x81,
-  DW_AT_call_tail_call = 0x82,
-  DW_AT_call_target = 0x83,
-  DW_AT_call_target_clobbered = 0x84,
-  DW_AT_call_data_location = 0x85,
-  DW_AT_call_data_value = 0x86,
-  DW_AT_noreturn = 0x87,
-  DW_AT_alignment = 0x88,
-  DW_AT_export_symbols = 0x89,
-  DW_AT_deleted = 0x8a,
-  DW_AT_defaulted = 0x8b,
-  DW_AT_loclists_base = 0x8c,
-  DW_AT_lo_user = 0x2000,
-  DW_AT_hi_user = 0x3fff,
-  DW_AT_MIPS_fde = 0x2001,
-  DW_AT_MIPS_loop_begin = 0x2002,
-  DW_AT_MIPS_tail_loop_begin = 0x2003,
-  DW_AT_MIPS_epilog_begin = 0x2004,
-  DW_AT_MIPS_loop_unroll_factor = 0x2005,
-  DW_AT_MIPS_software_pipeline_depth = 0x2006,
-  DW_AT_MIPS_linkage_name = 0x2007,
-  DW_AT_MIPS_stride = 0x2008,
-  DW_AT_MIPS_abstract_name = 0x2009,
-  DW_AT_MIPS_clone_origin = 0x200a,
-  DW_AT_MIPS_has_inlines = 0x200b,
-  DW_AT_HP_block_index = 0x2000,
-  DW_AT_HP_unmodifiable = 0x2001,
-  DW_AT_HP_prologue = 0x2005,
-  DW_AT_HP_epilogue = 0x2008,
-  DW_AT_HP_actuals_stmt_list = 0x2010,
-  DW_AT_HP_proc_per_section = 0x2011,
-  DW_AT_HP_raw_data_ptr = 0x2012,
-  DW_AT_HP_pass_by_reference = 0x2013,
-  DW_AT_HP_opt_level = 0x2014,
-  DW_AT_HP_prof_version_id = 0x2015,
-  DW_AT_HP_opt_flags = 0x2016,
-  DW_AT_HP_cold_region_low_pc = 0x2017,
-  DW_AT_HP_cold_region_high_pc = 0x2018,
-  DW_AT_HP_all_variables_modifiable = 0x2019,
-  DW_AT_HP_linkage_name = 0x201a,
-  DW_AT_HP_prof_flags = 0x201b,
-  DW_AT_HP_unit_name = 0x201f,
-  DW_AT_HP_unit_size = 0x2020,
-  DW_AT_HP_widened_byte_size = 0x2021,
-  DW_AT_HP_definition_points = 0x2022,
-  DW_AT_HP_default_location = 0x2023,
-  DW_AT_HP_is_result_param = 0x2029,
-  DW_AT_sf_names = 0x2101,
-  DW_AT_src_info = 0x2102,
-  DW_AT_mac_info = 0x2103,
-  DW_AT_src_coords = 0x2104,
-  DW_AT_body_begin = 0x2105,
-  DW_AT_body_end = 0x2106,
-  DW_AT_GNU_vector = 0x2107,
-  DW_AT_GNU_guarded_by = 0x2108,
-  DW_AT_GNU_pt_guarded_by = 0x2109,
-  DW_AT_GNU_guarded = 0x210a,
-  DW_AT_GNU_pt_guarded = 0x210b,
-  DW_AT_GNU_locks_excluded = 0x210c,
-  DW_AT_GNU_exclusive_locks_required = 0x210d,
-  DW_AT_GNU_shared_locks_required = 0x210e,
-  DW_AT_GNU_odr_signature = 0x210f,
-  DW_AT_GNU_template_name = 0x2110,
-  DW_AT_GNU_call_site_value = 0x2111,
-  DW_AT_GNU_call_site_data_value = 0x2112,
-  DW_AT_GNU_call_site_target = 0x2113,
-  DW_AT_GNU_call_site_target_clobbered = 0x2114,
-  DW_AT_GNU_tail_call = 0x2115,
-  DW_AT_GNU_all_tail_call_sites = 0x2116,
-  DW_AT_GNU_all_call_sites = 0x2117,
-  DW_AT_GNU_all_source_call_sites = 0x2118,
-  DW_AT_GNU_macros = 0x2119,
-  DW_AT_GNU_deleted = 0x211a,
-  DW_AT_GNU_dwo_name = 0x2130,
-  DW_AT_GNU_dwo_id = 0x2131,
-  DW_AT_GNU_ranges_base = 0x2132,
-  DW_AT_GNU_addr_base = 0x2133,
-  DW_AT_GNU_pubnames = 0x2134,
-  DW_AT_GNU_pubtypes = 0x2135,
-  DW_AT_GNU_discriminator = 0x2136,
-  DW_AT_GNU_locviews = 0x2137,
-  DW_AT_GNU_entry_view = 0x2138,
-  DW_AT_VMS_rtnbeg_pd_address = 0x2201,
-  DW_AT_use_GNAT_descriptive_type = 0x2301,
-  DW_AT_GNAT_descriptive_type = 0x2302,
-  DW_AT_GNU_numerator = 0x2303,
-  DW_AT_GNU_denominator = 0x2304,
-  DW_AT_GNU_bias = 0x2305,
-  DW_AT_upc_threads_scaled = 0x3210,
-  DW_AT_PGI_lbase = 0x3a00,
-  DW_AT_PGI_soffset = 0x3a01,
-  DW_AT_PGI_lstride = 0x3a02,
-  DW_AT_APPLE_optimized = 0x3fe1,
-  DW_AT_APPLE_flags = 0x3fe2,
-  DW_AT_APPLE_isa = 0x3fe3,
-  DW_AT_APPLE_block = 0x3fe4,
-  DW_AT_APPLE_major_runtime_vers = 0x3fe5,
-  DW_AT_APPLE_runtime_class = 0x3fe6,
-  DW_AT_APPLE_omit_frame_ptr = 0x3fe7,
-  DW_AT_APPLE_property_name = 0x3fe8,
-  DW_AT_APPLE_property_getter = 0x3fe9,
-  DW_AT_APPLE_property_setter = 0x3fea,
-  DW_AT_APPLE_property_attribute = 0x3feb,
-  DW_AT_APPLE_objc_complete_type = 0x3fec,
-  DW_AT_APPLE_property = 0x3fed
-};
-
-enum dwarf_line_number_op {
-  DW_LNS_extended_op = 0x0,
-  DW_LNS_copy = 0x1,
-  DW_LNS_advance_pc = 0x2,
-  DW_LNS_advance_line = 0x3,
-  DW_LNS_set_file = 0x4,
-  DW_LNS_set_column = 0x5,
-  DW_LNS_negate_stmt = 0x6,
-  DW_LNS_set_basic_block = 0x7,
-  DW_LNS_const_add_pc = 0x8,
-  DW_LNS_fixed_advance_pc = 0x9,
-  DW_LNS_set_prologue_end = 0xa,
-  DW_LNS_set_epilogue_begin = 0xb,
-  DW_LNS_set_isa = 0xc,
-};
-
-enum dwarf_extended_line_number_op {
-  DW_LNE_end_sequence = 0x1,
-  DW_LNE_set_address = 0x2,
-  DW_LNE_define_file = 0x3,
-  DW_LNE_set_discriminator = 0x4,
-};
-
-enum dwarf_line_number_content_type {
-  DW_LNCT_path = 0x1,
-  DW_LNCT_directory_index = 0x2,
-  DW_LNCT_timestamp = 0x3,
-  DW_LNCT_size = 0x4,
-  DW_LNCT_MD5 = 0x5,
-  DW_LNCT_lo_user = 0x2000,
-  DW_LNCT_hi_user = 0x3fff
-};
-
-enum dwarf_range_list_entry {
-  DW_RLE_end_of_list = 0x00,
-  DW_RLE_base_addressx = 0x01,
-  DW_RLE_startx_endx = 0x02,
-  DW_RLE_startx_length = 0x03,
-  DW_RLE_offset_pair = 0x04,
-  DW_RLE_base_address = 0x05,
-  DW_RLE_start_end = 0x06,
-  DW_RLE_start_length = 0x07
-};
-
-enum dwarf_unit_type {
-  DW_UT_compile = 0x01,
-  DW_UT_type = 0x02,
-  DW_UT_partial = 0x03,
-  DW_UT_skeleton = 0x04,
-  DW_UT_split_compile = 0x05,
-  DW_UT_split_type = 0x06,
-  DW_UT_lo_user = 0x80,
-  DW_UT_hi_user = 0xff
-};
-
-#if !defined(HAVE_DECL_STRNLEN) || !HAVE_DECL_STRNLEN
-
-/* If strnlen is not declared, provide our own version.  */
-
-static size_t
-xstrnlen (const char *s, size_t maxlen)
-{
-  size_t i;
-
-  for (i = 0; i < maxlen; ++i)
-    if (s[i] == '\0')
-      break;
-  return i;
-}
-
-#define strnlen xstrnlen
-
-#endif
-
-/* A buffer to read DWARF info.  */
-
-struct dwarf_buf
-{
-  /* Buffer name for error messages.  */
-  const char *name;
-  /* Start of the buffer.  */
-  const unsigned char *start;
-  /* Next byte to read.  */
-  const unsigned char *buf;
-  /* The number of bytes remaining.  */
-  size_t left;
-  /* Whether the data is big-endian.  */
-  int is_bigendian;
-  /* Error callback routine.  */
-  backtrace_error_callback error_callback;
-  /* Data for error_callback.  */
-  void *data;
-  /* Non-zero if we've reported an underflow error.  */
-  int reported_underflow;
-};
-
-/* A single attribute in a DWARF abbreviation.  */
-
-struct attr
-{
-  /* The attribute name.  */
-  enum dwarf_attribute name;
-  /* The attribute form.  */
-  enum dwarf_form form;
-  /* The attribute value, for DW_FORM_implicit_const.  */
-  int64_t val;
-};
-
-/* A single DWARF abbreviation.  */
-
-struct abbrev
-{
-  /* The abbrev code--the number used to refer to the abbrev.  */
-  uint64_t code;
-  /* The entry tag.  */
-  enum dwarf_tag tag;
-  /* Non-zero if this abbrev has child entries.  */
-  int has_children;
-  /* The number of attributes.  */
-  size_t num_attrs;
-  /* The attributes.  */
-  struct attr *attrs;
-};
-
-/* The DWARF abbreviations for a compilation unit.  This structure
-   only exists while reading the compilation unit.  Most DWARF readers
-   seem to a hash table to map abbrev ID's to abbrev entries.
-   However, we primarily care about GCC, and GCC simply issues ID's in
-   numerical order starting at 1.  So we simply keep a sorted vector,
-   and try to just look up the code.  */
-
-struct abbrevs
-{
-  /* The number of abbrevs in the vector.  */
-  size_t num_abbrevs;
-  /* The abbrevs, sorted by the code field.  */
-  struct abbrev *abbrevs;
-};
-
-/* The different kinds of attribute values.  */
-
-enum attr_val_encoding
-{
-  /* No attribute value.  */
-  ATTR_VAL_NONE,
-  /* An address.  */
-  ATTR_VAL_ADDRESS,
-  /* An index into the .debug_addr section, whose value is relative to
-   * the DW_AT_addr_base attribute of the compilation unit.  */
-  ATTR_VAL_ADDRESS_INDEX,
-  /* A unsigned integer.  */
-  ATTR_VAL_UINT,
-  /* A sigd integer.  */
-  ATTR_VAL_SINT,
-  /* A string.  */
-  ATTR_VAL_STRING,
-  /* An index into the .debug_str_offsets section.  */
-  ATTR_VAL_STRING_INDEX,
-  /* An offset to other data in the containing unit.  */
-  ATTR_VAL_REF_UNIT,
-  /* An offset to other data within the .debug_info section.  */
-  ATTR_VAL_REF_INFO,
-  /* An offset to other data within the alt .debug_info section.  */
-  ATTR_VAL_REF_ALT_INFO,
-  /* An offset to data in some other section.  */
-  ATTR_VAL_REF_SECTION,
-  /* A type signature.  */
-  ATTR_VAL_REF_TYPE,
-  /* An index into the .debug_rnglists section.  */
-  ATTR_VAL_RNGLISTS_INDEX,
-  /* A block of data (not represented).  */
-  ATTR_VAL_BLOCK,
-  /* An expression (not represented).  */
-  ATTR_VAL_EXPR,
-};
-
-/* An attribute value.  */
-
-struct attr_val
-{
-  /* How the value is stored in the field u.  */
-  enum attr_val_encoding encoding;
-  union
-  {
-    /* ATTR_VAL_ADDRESS*, ATTR_VAL_UINT, ATTR_VAL_REF*.  */
-    uint64_t uint;
-    /* ATTR_VAL_SINT.  */
-    int64_t sint;
-    /* ATTR_VAL_STRING.  */
-    const char *string;
-    /* ATTR_VAL_BLOCK not stored.  */
-  } u;
-};
-
-/* The line number program header.  */
-
-struct line_header
-{
-  /* The version of the line number information.  */
-  int version;
-  /* Address size.  */
-  int addrsize;
-  /* The minimum instruction length.  */
-  unsigned int min_insn_len;
-  /* The maximum number of ops per instruction.  */
-  unsigned int max_ops_per_insn;
-  /* The line base for special opcodes.  */
-  int line_base;
-  /* The line range for special opcodes.  */
-  unsigned int line_range;
-  /* The opcode base--the first special opcode.  */
-  unsigned int opcode_base;
-  /* Opcode lengths, indexed by opcode - 1.  */
-  const unsigned char *opcode_lengths;
-  /* The number of directory entries.  */
-  size_t dirs_count;
-  /* The directory entries.  */
-  const char **dirs;
-  /* The number of filenames.  */
-  size_t filenames_count;
-  /* The filenames.  */
-  const char **filenames;
-};
-
-/* A format description from a line header.  */
-
-struct line_header_format
-{
-  int lnct;		/* LNCT code.  */
-  enum dwarf_form form;	/* Form of entry data.  */
-};
-
-/* Map a single PC value to a file/line.  We will keep a vector of
-   these sorted by PC value.  Each file/line will be correct from the
-   PC up to the PC of the next entry if there is one.  We allocate one
-   extra entry at the end so that we can use bsearch.  */
-
-struct line
-{
-  /* PC.  */
-  uintptr_t pc;
-  /* File name.  Many entries in the array are expected to point to
-     the same file name.  */
-  const char *filename;
-  /* Line number.  */
-  int lineno;
-  /* Index of the object in the original array read from the DWARF
-     section, before it has been sorted.  The index makes it possible
-     to use Quicksort and maintain stability.  */
-  int idx;
-};
-
-/* A growable vector of line number information.  This is used while
-   reading the line numbers.  */
-
-struct line_vector
-{
-  /* Memory.  This is an array of struct line.  */
-  struct backtrace_vector vec;
-  /* Number of valid mappings.  */
-  size_t count;
-};
-
-/* A function described in the debug info.  */
-
-struct function
-{
-  /* The name of the function.  */
-  const char *name;
-  /* If this is an inlined function, the filename of the call
-     site.  */
-  const char *caller_filename;
-  /* If this is an inlined function, the line number of the call
-     site.  */
-  int caller_lineno;
-  /* Map PC ranges to inlined functions.  */
-  struct function_addrs *function_addrs;
-  size_t function_addrs_count;
-};
-
-/* An address range for a function.  This maps a PC value to a
-   specific function.  */
-
-struct function_addrs
-{
-  /* Range is LOW <= PC < HIGH.  */
-  uint64_t low;
-  uint64_t high;
-  /* Function for this address range.  */
-  struct function *function;
-};
-
-/* A growable vector of function address ranges.  */
-
-struct function_vector
-{
-  /* Memory.  This is an array of struct function_addrs.  */
-  struct backtrace_vector vec;
-  /* Number of address ranges present.  */
-  size_t count;
-};
-
-/* A DWARF compilation unit.  This only holds the information we need
-   to map a PC to a file and line.  */
-
-struct unit
-{
-  /* The first entry for this compilation unit.  */
-  const unsigned char *unit_data;
-  /* The length of the data for this compilation unit.  */
-  size_t unit_data_len;
-  /* The offset of UNIT_DATA from the start of the information for
-     this compilation unit.  */
-  size_t unit_data_offset;
-  /* Offset of the start of the compilation unit from the start of the
-     .debug_info section.  */
-  size_t low_offset;
-  /* Offset of the end of the compilation unit from the start of the
-     .debug_info section.  */
-  size_t high_offset;
-  /* DWARF version.  */
-  int version;
-  /* Whether unit is DWARF64.  */
-  int is_dwarf64;
-  /* Address size.  */
-  int addrsize;
-  /* Offset into line number information.  */
-  off_t lineoff;
-  /* Offset of compilation unit in .debug_str_offsets.  */
-  uint64_t str_offsets_base;
-  /* Offset of compilation unit in .debug_addr.  */
-  uint64_t addr_base;
-  /* Offset of compilation unit in .debug_rnglists.  */
-  uint64_t rnglists_base;
-  /* Primary source file.  */
-  const char *filename;
-  /* Compilation command working directory.  */
-  const char *comp_dir;
-  /* Absolute file name, only set if needed.  */
-  const char *abs_filename;
-  /* The abbreviations for this unit.  */
-  struct abbrevs abbrevs;
-
-  /* The fields above this point are read in during initialization and
-     may be accessed freely.  The fields below this point are read in
-     as needed, and therefore require care, as different threads may
-     try to initialize them simultaneously.  */
-
-  /* PC to line number mapping.  This is NULL if the values have not
-     been read.  This is (struct line *) -1 if there was an error
-     reading the values.  */
-  struct line *lines;
-  /* Number of entries in lines.  */
-  size_t lines_count;
-  /* PC ranges to function.  */
-  struct function_addrs *function_addrs;
-  size_t function_addrs_count;
-};
-
-/* An address range for a compilation unit.  This maps a PC value to a
-   specific compilation unit.  Note that we invert the representation
-   in DWARF: instead of listing the units and attaching a list of
-   ranges, we list the ranges and have each one point to the unit.
-   This lets us do a binary search to find the unit.  */
-
-struct unit_addrs
-{
-  /* Range is LOW <= PC < HIGH.  */
-  uint64_t low;
-  uint64_t high;
-  /* Compilation unit for this address range.  */
-  struct unit *u;
-};
-
-/* A growable vector of compilation unit address ranges.  */
-
-struct unit_addrs_vector
-{
-  /* Memory.  This is an array of struct unit_addrs.  */
-  struct backtrace_vector vec;
-  /* Number of address ranges present.  */
-  size_t count;
-};
-
-/* A growable vector of compilation unit pointer.  */
-
-struct unit_vector
-{
-  struct backtrace_vector vec;
-  size_t count;
-};
-
-/* The information we need to map a PC to a file and line.  */
-
-struct dwarf_data
-{
-  /* The data for the next file we know about.  */
-  struct dwarf_data *next;
-  /* The data for .gnu_debugaltlink.  */
-  struct dwarf_data *altlink;
-  /* The base address for this file.  */
-  uintptr_t base_address;
-  /* A sorted list of address ranges.  */
-  struct unit_addrs *addrs;
-  /* Number of address ranges in list.  */
-  size_t addrs_count;
-  /* A sorted list of units.  */
-  struct unit **units;
-  /* Number of units in the list.  */
-  size_t units_count;
-  /* The unparsed DWARF debug data.  */
-  struct dwarf_sections dwarf_sections;
-  /* Whether the data is big-endian or not.  */
-  int is_bigendian;
-  /* A vector used for function addresses.  We keep this here so that
-     we can grow the vector as we read more functions.  */
-  struct function_vector fvec;
-};
-
-/* Report an error for a DWARF buffer.  */
-
-static void
-dwarf_buf_error (struct dwarf_buf *buf, const char *msg, int errnum)
-{
-  char b[200];
-
-  snprintf (b, sizeof b, "%s in %s at %d",
-	    msg, buf->name, (int) (buf->buf - buf->start));
-  buf->error_callback (buf->data, b, errnum);
-}
-
-/* Require at least COUNT bytes in BUF.  Return 1 if all is well, 0 on
-   error.  */
-
-static int
-require (struct dwarf_buf *buf, size_t count)
-{
-  if (buf->left >= count)
-    return 1;
-
-  if (!buf->reported_underflow)
-    {
-      dwarf_buf_error (buf, "DWARF underflow", 0);
-      buf->reported_underflow = 1;
-    }
-
-  return 0;
-}
-
-/* Advance COUNT bytes in BUF.  Return 1 if all is well, 0 on
-   error.  */
-
-static int
-advance (struct dwarf_buf *buf, size_t count)
-{
-  if (!require (buf, count))
-    return 0;
-  buf->buf += count;
-  buf->left -= count;
-  return 1;
-}
-
-/* Read one zero-terminated string from BUF and advance past the string.  */
-
-static const char *
-read_string (struct dwarf_buf *buf)
-{
-  const char *p = (const char *)buf->buf;
-  size_t len = strnlen (p, buf->left);
-
-  /* - If len == left, we ran out of buffer before finding the zero terminator.
-       Generate an error by advancing len + 1.
-     - If len < left, advance by len + 1 to skip past the zero terminator.  */
-  size_t count = len + 1;
-
-  if (!advance (buf, count))
-    return NULL;
-
-  return p;
-}
-
-/* Read one byte from BUF and advance 1 byte.  */
-
-static unsigned char
-read_byte (struct dwarf_buf *buf)
-{
-  const unsigned char *p = buf->buf;
-
-  if (!advance (buf, 1))
-    return 0;
-  return p[0];
-}
-
-/* Read a signed char from BUF and advance 1 byte.  */
-
-static signed char
-read_sbyte (struct dwarf_buf *buf)
-{
-  const unsigned char *p = buf->buf;
-
-  if (!advance (buf, 1))
-    return 0;
-  return (*p ^ 0x80) - 0x80;
-}
-
-/* Read a uint16 from BUF and advance 2 bytes.  */
-
-static uint16_t
-read_uint16 (struct dwarf_buf *buf)
-{
-  const unsigned char *p = buf->buf;
-
-  if (!advance (buf, 2))
-    return 0;
-  if (buf->is_bigendian)
-    return ((uint16_t) p[0] << 8) | (uint16_t) p[1];
-  else
-    return ((uint16_t) p[1] << 8) | (uint16_t) p[0];
-}
-
-/* Read a 24 bit value from BUF and advance 3 bytes.  */
-
-static uint32_t
-read_uint24 (struct dwarf_buf *buf)
-{
-  const unsigned char *p = buf->buf;
-
-  if (!advance (buf, 3))
-    return 0;
-  if (buf->is_bigendian)
-    return (((uint32_t) p[0] << 16) | ((uint32_t) p[1] << 8)
-	    | (uint32_t) p[2]);
-  else
-    return (((uint32_t) p[2] << 16) | ((uint32_t) p[1] << 8)
-	    | (uint32_t) p[0]);
-}
-
-/* Read a uint32 from BUF and advance 4 bytes.  */
-
-static uint32_t
-read_uint32 (struct dwarf_buf *buf)
-{
-  const unsigned char *p = buf->buf;
-
-  if (!advance (buf, 4))
-    return 0;
-  if (buf->is_bigendian)
-    return (((uint32_t) p[0] << 24) | ((uint32_t) p[1] << 16)
-	    | ((uint32_t) p[2] << 8) | (uint32_t) p[3]);
-  else
-    return (((uint32_t) p[3] << 24) | ((uint32_t) p[2] << 16)
-	    | ((uint32_t) p[1] << 8) | (uint32_t) p[0]);
-}
-
-/* Read a uint64 from BUF and advance 8 bytes.  */
-
-static uint64_t
-read_uint64 (struct dwarf_buf *buf)
-{
-  const unsigned char *p = buf->buf;
-
-  if (!advance (buf, 8))
-    return 0;
-  if (buf->is_bigendian)
-    return (((uint64_t) p[0] << 56) | ((uint64_t) p[1] << 48)
-	    | ((uint64_t) p[2] << 40) | ((uint64_t) p[3] << 32)
-	    | ((uint64_t) p[4] << 24) | ((uint64_t) p[5] << 16)
-	    | ((uint64_t) p[6] << 8) | (uint64_t) p[7]);
-  else
-    return (((uint64_t) p[7] << 56) | ((uint64_t) p[6] << 48)
-	    | ((uint64_t) p[5] << 40) | ((uint64_t) p[4] << 32)
-	    | ((uint64_t) p[3] << 24) | ((uint64_t) p[2] << 16)
-	    | ((uint64_t) p[1] << 8) | (uint64_t) p[0]);
-}
-
-/* Read an offset from BUF and advance the appropriate number of
-   bytes.  */
-
-static uint64_t
-read_offset (struct dwarf_buf *buf, int is_dwarf64)
-{
-  if (is_dwarf64)
-    return read_uint64 (buf);
-  else
-    return read_uint32 (buf);
-}
-
-/* Read an address from BUF and advance the appropriate number of
-   bytes.  */
-
-static uint64_t
-read_address (struct dwarf_buf *buf, int addrsize)
-{
-  switch (addrsize)
-    {
-    case 1:
-      return read_byte (buf);
-    case 2:
-      return read_uint16 (buf);
-    case 4:
-      return read_uint32 (buf);
-    case 8:
-      return read_uint64 (buf);
-    default:
-      dwarf_buf_error (buf, "unrecognized address size", 0);
-      return 0;
-    }
-}
-
-/* Return whether a value is the highest possible address, given the
-   address size.  */
-
-static int
-is_highest_address (uint64_t address, int addrsize)
-{
-  switch (addrsize)
-    {
-    case 1:
-      return address == (unsigned char) -1;
-    case 2:
-      return address == (uint16_t) -1;
-    case 4:
-      return address == (uint32_t) -1;
-    case 8:
-      return address == (uint64_t) -1;
-    default:
-      return 0;
-    }
-}
-
-/* Read an unsigned LEB128 number.  */
-
-static uint64_t
-read_uleb128 (struct dwarf_buf *buf)
-{
-  uint64_t ret;
-  unsigned int shift;
-  int overflow;
-  unsigned char b;
-
-  ret = 0;
-  shift = 0;
-  overflow = 0;
-  do
-    {
-      const unsigned char *p;
-
-      p = buf->buf;
-      if (!advance (buf, 1))
-	return 0;
-      b = *p;
-      if (shift < 64)
-	ret |= ((uint64_t) (b & 0x7f)) << shift;
-      else if (!overflow)
-	{
-	  dwarf_buf_error (buf, "LEB128 overflows uint64_t", 0);
-	  overflow = 1;
-	}
-      shift += 7;
-    }
-  while ((b & 0x80) != 0);
-
-  return ret;
-}
-
-/* Read a signed LEB128 number.  */
-
-static int64_t
-read_sleb128 (struct dwarf_buf *buf)
-{
-  uint64_t val;
-  unsigned int shift;
-  int overflow;
-  unsigned char b;
-
-  val = 0;
-  shift = 0;
-  overflow = 0;
-  do
-    {
-      const unsigned char *p;
-
-      p = buf->buf;
-      if (!advance (buf, 1))
-	return 0;
-      b = *p;
-      if (shift < 64)
-	val |= ((uint64_t) (b & 0x7f)) << shift;
-      else if (!overflow)
-	{
-	  dwarf_buf_error (buf, "signed LEB128 overflows uint64_t", 0);
-	  overflow = 1;
-	}
-      shift += 7;
-    }
-  while ((b & 0x80) != 0);
-
-  if ((b & 0x40) != 0 && shift < 64)
-    val |= ((uint64_t) -1) << shift;
-
-  return (int64_t) val;
-}
-
-/* Return the length of an LEB128 number.  */
-
-static size_t
-leb128_len (const unsigned char *p)
-{
-  size_t ret;
-
-  ret = 1;
-  while ((*p & 0x80) != 0)
-    {
-      ++p;
-      ++ret;
-    }
-  return ret;
-}
-
-/* Read initial_length from BUF and advance the appropriate number of bytes.  */
-
-static uint64_t
-read_initial_length (struct dwarf_buf *buf, int *is_dwarf64)
-{
-  uint64_t len;
-
-  len = read_uint32 (buf);
-  if (len == 0xffffffff)
-    {
-      len = read_uint64 (buf);
-      *is_dwarf64 = 1;
-    }
-  else
-    *is_dwarf64 = 0;
-
-  return len;
-}
-
-/* Free an abbreviations structure.  */
-
-static void
-free_abbrevs (struct backtrace_state *state, struct abbrevs *abbrevs,
-	      backtrace_error_callback error_callback, void *data)
-{
-  size_t i;
-
-  for (i = 0; i < abbrevs->num_abbrevs; ++i)
-    backtrace_free (state, abbrevs->abbrevs[i].attrs,
-		    abbrevs->abbrevs[i].num_attrs * sizeof (struct attr),
-		    error_callback, data);
-  backtrace_free (state, abbrevs->abbrevs,
-		  abbrevs->num_abbrevs * sizeof (struct abbrev),
-		  error_callback, data);
-  abbrevs->num_abbrevs = 0;
-  abbrevs->abbrevs = NULL;
-}
-
-/* Read an attribute value.  Returns 1 on success, 0 on failure.  If
-   the value can be represented as a uint64_t, sets *VAL and sets
-   *IS_VALID to 1.  We don't try to store the value of other attribute
-   forms, because we don't care about them.  */
-
-static int
-read_attribute (enum dwarf_form form, uint64_t implicit_val,
-		struct dwarf_buf *buf, int is_dwarf64, int version,
-		int addrsize, const struct dwarf_sections *dwarf_sections,
-		struct dwarf_data *altlink, struct attr_val *val)
-{
-  /* Avoid warnings about val.u.FIELD may be used uninitialized if
-     this function is inlined.  The warnings aren't valid but can
-     occur because the different fields are set and used
-     conditionally.  */
-  memset (val, 0, sizeof *val);
-
-  switch (form)
-    {
-    case DW_FORM_addr:
-      val->encoding = ATTR_VAL_ADDRESS;
-      val->u.uint = read_address (buf, addrsize);
-      return 1;
-    case DW_FORM_block2:
-      val->encoding = ATTR_VAL_BLOCK;
-      return advance (buf, read_uint16 (buf));
-    case DW_FORM_block4:
-      val->encoding = ATTR_VAL_BLOCK;
-      return advance (buf, read_uint32 (buf));
-    case DW_FORM_data2:
-      val->encoding = ATTR_VAL_UINT;
-      val->u.uint = read_uint16 (buf);
-      return 1;
-    case DW_FORM_data4:
-      val->encoding = ATTR_VAL_UINT;
-      val->u.uint = read_uint32 (buf);
-      return 1;
-    case DW_FORM_data8:
-      val->encoding = ATTR_VAL_UINT;
-      val->u.uint = read_uint64 (buf);
-      return 1;
-    case DW_FORM_data16:
-      val->encoding = ATTR_VAL_BLOCK;
-      return advance (buf, 16);
-    case DW_FORM_string:
-      val->encoding = ATTR_VAL_STRING;
-      val->u.string = read_string (buf);
-      return val->u.string == NULL ? 0 : 1;
-    case DW_FORM_block:
-      val->encoding = ATTR_VAL_BLOCK;
-      return advance (buf, read_uleb128 (buf));
-    case DW_FORM_block1:
-      val->encoding = ATTR_VAL_BLOCK;
-      return advance (buf, read_byte (buf));
-    case DW_FORM_data1:
-      val->encoding = ATTR_VAL_UINT;
-      val->u.uint = read_byte (buf);
-      return 1;
-    case DW_FORM_flag:
-      val->encoding = ATTR_VAL_UINT;
-      val->u.uint = read_byte (buf);
-      return 1;
-    case DW_FORM_sdata:
-      val->encoding = ATTR_VAL_SINT;
-      val->u.sint = read_sleb128 (buf);
-      return 1;
-    case DW_FORM_strp:
-      {
-	uint64_t offset;
-
-	offset = read_offset (buf, is_dwarf64);
-	if (offset >= dwarf_sections->size[DEBUG_STR])
-	  {
-	    dwarf_buf_error (buf, "DW_FORM_strp out of range", 0);
-	    return 0;
-	  }
-	val->encoding = ATTR_VAL_STRING;
-	val->u.string =
-	  (const char *) dwarf_sections->data[DEBUG_STR] + offset;
-	return 1;
-      }
-    case DW_FORM_line_strp:
-      {
-	uint64_t offset;
-
-	offset = read_offset (buf, is_dwarf64);
-	if (offset >= dwarf_sections->size[DEBUG_LINE_STR])
-	  {
-	    dwarf_buf_error (buf, "DW_FORM_line_strp out of range", 0);
-	    return 0;
-	  }
-	val->encoding = ATTR_VAL_STRING;
-	val->u.string =
-	  (const char *) dwarf_sections->data[DEBUG_LINE_STR] + offset;
-	return 1;
-      }
-    case DW_FORM_udata:
-      val->encoding = ATTR_VAL_UINT;
-      val->u.uint = read_uleb128 (buf);
-      return 1;
-    case DW_FORM_ref_addr:
-      val->encoding = ATTR_VAL_REF_INFO;
-      if (version == 2)
-	val->u.uint = read_address (buf, addrsize);
-      else
-	val->u.uint = read_offset (buf, is_dwarf64);
-      return 1;
-    case DW_FORM_ref1:
-      val->encoding = ATTR_VAL_REF_UNIT;
-      val->u.uint = read_byte (buf);
-      return 1;
-    case DW_FORM_ref2:
-      val->encoding = ATTR_VAL_REF_UNIT;
-      val->u.uint = read_uint16 (buf);
-      return 1;
-    case DW_FORM_ref4:
-      val->encoding = ATTR_VAL_REF_UNIT;
-      val->u.uint = read_uint32 (buf);
-      return 1;
-    case DW_FORM_ref8:
-      val->encoding = ATTR_VAL_REF_UNIT;
-      val->u.uint = read_uint64 (buf);
-      return 1;
-    case DW_FORM_ref_udata:
-      val->encoding = ATTR_VAL_REF_UNIT;
-      val->u.uint = read_uleb128 (buf);
-      return 1;
-    case DW_FORM_indirect:
-      {
-	uint64_t form;
-
-	form = read_uleb128 (buf);
-	if (form == DW_FORM_implicit_const)
-	  {
-	    dwarf_buf_error (buf,
-			     "DW_FORM_indirect to DW_FORM_implicit_const",
-			     0);
-	    return 0;
-	  }
-	return read_attribute ((enum dwarf_form) form, 0, buf, is_dwarf64,
-			       version, addrsize, dwarf_sections, altlink,
-			       val);
-      }
-    case DW_FORM_sec_offset:
-      val->encoding = ATTR_VAL_REF_SECTION;
-      val->u.uint = read_offset (buf, is_dwarf64);
-      return 1;
-    case DW_FORM_exprloc:
-      val->encoding = ATTR_VAL_EXPR;
-      return advance (buf, read_uleb128 (buf));
-    case DW_FORM_flag_present:
-      val->encoding = ATTR_VAL_UINT;
-      val->u.uint = 1;
-      return 1;
-    case DW_FORM_ref_sig8:
-      val->encoding = ATTR_VAL_REF_TYPE;
-      val->u.uint = read_uint64 (buf);
-      return 1;
-    case DW_FORM_strx: case DW_FORM_strx1: case DW_FORM_strx2:
-    case DW_FORM_strx3: case DW_FORM_strx4:
-      {
-	uint64_t offset;
-
-	switch (form)
-	  {
-	  case DW_FORM_strx:
-	    offset = read_uleb128 (buf);
-	    break;
-	  case DW_FORM_strx1:
-	    offset = read_byte (buf);
-	    break;
-	  case DW_FORM_strx2:
-	    offset = read_uint16 (buf);
-	    break;
-	  case DW_FORM_strx3:
-	    offset = read_uint24 (buf);
-	    break;
-	  case DW_FORM_strx4:
-	    offset = read_uint32 (buf);
-	    break;
-	  default:
-	    /* This case can't happen.  */
-	    return 0;
-	  }
-	val->encoding = ATTR_VAL_STRING_INDEX;
-	val->u.uint = offset;
-	return 1;
-      }
-    case DW_FORM_addrx: case DW_FORM_addrx1: case DW_FORM_addrx2:
-    case DW_FORM_addrx3: case DW_FORM_addrx4:
-      {
-	uint64_t offset;
-
-	switch (form)
-	  {
-	  case DW_FORM_addrx:
-	    offset = read_uleb128 (buf);
-	    break;
-	  case DW_FORM_addrx1:
-	    offset = read_byte (buf);
-	    break;
-	  case DW_FORM_addrx2:
-	    offset = read_uint16 (buf);
-	    break;
-	  case DW_FORM_addrx3:
-	    offset = read_uint24 (buf);
-	    break;
-	  case DW_FORM_addrx4:
-	    offset = read_uint32 (buf);
-	    break;
-	  default:
-	    /* This case can't happen.  */
-	    return 0;
-	  }
-	val->encoding = ATTR_VAL_ADDRESS_INDEX;
-	val->u.uint = offset;
-	return 1;
-      }
-    case DW_FORM_ref_sup4:
-      val->encoding = ATTR_VAL_REF_SECTION;
-      val->u.uint = read_uint32 (buf);
-      return 1;
-    case DW_FORM_ref_sup8:
-      val->encoding = ATTR_VAL_REF_SECTION;
-      val->u.uint = read_uint64 (buf);
-      return 1;
-    case DW_FORM_implicit_const:
-      val->encoding = ATTR_VAL_UINT;
-      val->u.uint = implicit_val;
-      return 1;
-    case DW_FORM_loclistx:
-      /* We don't distinguish this from DW_FORM_sec_offset.  It
-       * shouldn't matter since we don't care about loclists.  */
-      val->encoding = ATTR_VAL_REF_SECTION;
-      val->u.uint = read_uleb128 (buf);
-      return 1;
-    case DW_FORM_rnglistx:
-      val->encoding = ATTR_VAL_RNGLISTS_INDEX;
-      val->u.uint = read_uleb128 (buf);
-      return 1;
-    case DW_FORM_GNU_addr_index:
-      val->encoding = ATTR_VAL_REF_SECTION;
-      val->u.uint = read_uleb128 (buf);
-      return 1;
-    case DW_FORM_GNU_str_index:
-      val->encoding = ATTR_VAL_REF_SECTION;
-      val->u.uint = read_uleb128 (buf);
-      return 1;
-    case DW_FORM_GNU_ref_alt:
-      val->u.uint = read_offset (buf, is_dwarf64);
-      if (altlink == NULL)
-	{
-	  val->encoding = ATTR_VAL_NONE;
-	  return 1;
-	}
-      val->encoding = ATTR_VAL_REF_ALT_INFO;
-      return 1;
-    case DW_FORM_strp_sup: case DW_FORM_GNU_strp_alt:
-      {
-	uint64_t offset;
-
-	offset = read_offset (buf, is_dwarf64);
-	if (altlink == NULL)
-	  {
-	    val->encoding = ATTR_VAL_NONE;
-	    return 1;
-	  }
-	if (offset >= altlink->dwarf_sections.size[DEBUG_STR])
-	  {
-	    dwarf_buf_error (buf, "DW_FORM_strp_sup out of range", 0);
-	    return 0;
-	  }
-	val->encoding = ATTR_VAL_STRING;
-	val->u.string =
-	  (const char *) altlink->dwarf_sections.data[DEBUG_STR] + offset;
-	return 1;
-      }
-    default:
-      dwarf_buf_error (buf, "unrecognized DWARF form", -1);
-      return 0;
-    }
-}
-
-/* If we can determine the value of a string attribute, set *STRING to
-   point to the string.  Return 1 on success, 0 on error.  If we don't
-   know the value, we consider that a success, and we don't change
-   *STRING.  An error is only reported for some sort of out of range
-   offset.  */
-
-static int
-resolve_string (const struct dwarf_sections *dwarf_sections, int is_dwarf64,
-		int is_bigendian, uint64_t str_offsets_base,
-		const struct attr_val *val,
-		backtrace_error_callback error_callback, void *data,
-		const char **string)
-{
-  switch (val->encoding)
-    {
-    case ATTR_VAL_STRING:
-      *string = val->u.string;
-      return 1;
-
-    case ATTR_VAL_STRING_INDEX:
-      {
-	uint64_t offset;
-	struct dwarf_buf offset_buf;
-
-	offset = val->u.uint * (is_dwarf64 ? 8 : 4) + str_offsets_base;
-	if (offset + (is_dwarf64 ? 8 : 4)
-	    > dwarf_sections->size[DEBUG_STR_OFFSETS])
-	  {
-	    error_callback (data, "DW_FORM_strx value out of range", 0);
-	    return 0;
-	  }
-
-	offset_buf.name = ".debug_str_offsets";
-	offset_buf.start = dwarf_sections->data[DEBUG_STR_OFFSETS];
-	offset_buf.buf = dwarf_sections->data[DEBUG_STR_OFFSETS] + offset;
-	offset_buf.left = dwarf_sections->size[DEBUG_STR_OFFSETS] - offset;
-	offset_buf.is_bigendian = is_bigendian;
-	offset_buf.error_callback = error_callback;
-	offset_buf.data = data;
-	offset_buf.reported_underflow = 0;
-
-	offset = read_offset (&offset_buf, is_dwarf64);
-	if (offset >= dwarf_sections->size[DEBUG_STR])
-	  {
-	    dwarf_buf_error (&offset_buf,
-			     "DW_FORM_strx offset out of range",
-			     0);
-	    return 0;
-	  }
-	*string = (const char *) dwarf_sections->data[DEBUG_STR] + offset;
-	return 1;
-      }
-
-    default:
-      return 1;
-    }
-}
-
-/* Set *ADDRESS to the real address for a ATTR_VAL_ADDRESS_INDEX.
-   Return 1 on success, 0 on error.  */
-
-static int
-resolve_addr_index (const struct dwarf_sections *dwarf_sections,
-		    uint64_t addr_base, int addrsize, int is_bigendian,
-		    uint64_t addr_index,
-		    backtrace_error_callback error_callback, void *data,
-		    uint64_t *address)
-{
-  uint64_t offset;
-  struct dwarf_buf addr_buf;
-
-  offset = addr_index * addrsize + addr_base;
-  if (offset + addrsize > dwarf_sections->size[DEBUG_ADDR])
-    {
-      error_callback (data, "DW_FORM_addrx value out of range", 0);
-      return 0;
-    }
-
-  addr_buf.name = ".debug_addr";
-  addr_buf.start = dwarf_sections->data[DEBUG_ADDR];
-  addr_buf.buf = dwarf_sections->data[DEBUG_ADDR] + offset;
-  addr_buf.left = dwarf_sections->size[DEBUG_ADDR] - offset;
-  addr_buf.is_bigendian = is_bigendian;
-  addr_buf.error_callback = error_callback;
-  addr_buf.data = data;
-  addr_buf.reported_underflow = 0;
-
-  *address = read_address (&addr_buf, addrsize);
-  return 1;
-}
-
-/* Compare a unit offset against a unit for bsearch.  */
-
-static int
-units_search (const void *vkey, const void *ventry)
-{
-  const size_t *key = (const size_t *) vkey;
-  const struct unit *entry = *((const struct unit *const *) ventry);
-  size_t offset;
-
-  offset = *key;
-  if (offset < entry->low_offset)
-    return -1;
-  else if (offset >= entry->high_offset)
-    return 1;
-  else
-    return 0;
-}
-
-/* Find a unit in PU containing OFFSET.  */
-
-static struct unit *
-find_unit (struct unit **pu, size_t units_count, size_t offset)
-{
-  struct unit **u;
-  u = bsearch (&offset, pu, units_count, sizeof (struct unit *), units_search);
-  return u == NULL ? NULL : *u;
-}
-
-/* Compare function_addrs for qsort.  When ranges are nested, make the
-   smallest one sort last.  */
-
-static int
-function_addrs_compare (const void *v1, const void *v2)
-{
-  const struct function_addrs *a1 = (const struct function_addrs *) v1;
-  const struct function_addrs *a2 = (const struct function_addrs *) v2;
-
-  if (a1->low < a2->low)
-    return -1;
-  if (a1->low > a2->low)
-    return 1;
-  if (a1->high < a2->high)
-    return 1;
-  if (a1->high > a2->high)
-    return -1;
-  return strcmp (a1->function->name, a2->function->name);
-}
-
-/* Compare a PC against a function_addrs for bsearch.  We always
-   allocate an entra entry at the end of the vector, so that this
-   routine can safely look at the next entry.  Note that if there are
-   multiple ranges containing PC, which one will be returned is
-   unpredictable.  We compensate for that in dwarf_fileline.  */
-
-static int
-function_addrs_search (const void *vkey, const void *ventry)
-{
-  const uintptr_t *key = (const uintptr_t *) vkey;
-  const struct function_addrs *entry = (const struct function_addrs *) ventry;
-  uintptr_t pc;
-
-  pc = *key;
-  if (pc < entry->low)
-    return -1;
-  else if (pc > (entry + 1)->low)
-    return 1;
-  else
-    return 0;
-}
-
-/* Add a new compilation unit address range to a vector.  This is
-   called via add_ranges.  Returns 1 on success, 0 on failure.  */
-
-static int
-add_unit_addr (struct backtrace_state *state, void *rdata,
-	       uint64_t lowpc, uint64_t highpc,
-	       backtrace_error_callback error_callback, void *data,
-	       void *pvec)
-{
-  struct unit *u = (struct unit *) rdata;
-  struct unit_addrs_vector *vec = (struct unit_addrs_vector *) pvec;
-  struct unit_addrs *p;
-
-  /* Try to merge with the last entry.  */
-  if (vec->count > 0)
-    {
-      p = (struct unit_addrs *) vec->vec.base + (vec->count - 1);
-      if ((lowpc == p->high || lowpc == p->high + 1)
-	  && u == p->u)
-	{
-	  if (highpc > p->high)
-	    p->high = highpc;
-	  return 1;
-	}
-    }
-
-  p = ((struct unit_addrs *)
-       backtrace_vector_grow (state, sizeof (struct unit_addrs),
-			      error_callback, data, &vec->vec));
-  if (p == NULL)
-    return 0;
-
-  p->low = lowpc;
-  p->high = highpc;
-  p->u = u;
-
-  ++vec->count;
-
-  return 1;
-}
-
-/* Compare unit_addrs for qsort.  When ranges are nested, make the
-   smallest one sort last.  */
-
-static int
-unit_addrs_compare (const void *v1, const void *v2)
-{
-  const struct unit_addrs *a1 = (const struct unit_addrs *) v1;
-  const struct unit_addrs *a2 = (const struct unit_addrs *) v2;
-
-  if (a1->low < a2->low)
-    return -1;
-  if (a1->low > a2->low)
-    return 1;
-  if (a1->high < a2->high)
-    return 1;
-  if (a1->high > a2->high)
-    return -1;
-  if (a1->u->lineoff < a2->u->lineoff)
-    return -1;
-  if (a1->u->lineoff > a2->u->lineoff)
-    return 1;
-  return 0;
-}
-
-/* Compare a PC against a unit_addrs for bsearch.  We always allocate
-   an entry entry at the end of the vector, so that this routine can
-   safely look at the next entry.  Note that if there are multiple
-   ranges containing PC, which one will be returned is unpredictable.
-   We compensate for that in dwarf_fileline.  */
-
-static int
-unit_addrs_search (const void *vkey, const void *ventry)
-{
-  const uintptr_t *key = (const uintptr_t *) vkey;
-  const struct unit_addrs *entry = (const struct unit_addrs *) ventry;
-  uintptr_t pc;
-
-  pc = *key;
-  if (pc < entry->low)
-    return -1;
-  else if (pc > (entry + 1)->low)
-    return 1;
-  else
-    return 0;
-}
-
-/* Sort the line vector by PC.  We want a stable sort here to maintain
-   the order of lines for the same PC values.  Since the sequence is
-   being sorted in place, their addresses cannot be relied on to
-   maintain stability.  That is the purpose of the index member.  */
-
-static int
-line_compare (const void *v1, const void *v2)
-{
-  const struct line *ln1 = (const struct line *) v1;
-  const struct line *ln2 = (const struct line *) v2;
-
-  if (ln1->pc < ln2->pc)
-    return -1;
-  else if (ln1->pc > ln2->pc)
-    return 1;
-  else if (ln1->idx < ln2->idx)
-    return -1;
-  else if (ln1->idx > ln2->idx)
-    return 1;
-  else
-    return 0;
-}
-
-/* Find a PC in a line vector.  We always allocate an extra entry at
-   the end of the lines vector, so that this routine can safely look
-   at the next entry.  Note that when there are multiple mappings for
-   the same PC value, this will return the last one.  */
-
-static int
-line_search (const void *vkey, const void *ventry)
-{
-  const uintptr_t *key = (const uintptr_t *) vkey;
-  const struct line *entry = (const struct line *) ventry;
-  uintptr_t pc;
-
-  pc = *key;
-  if (pc < entry->pc)
-    return -1;
-  else if (pc >= (entry + 1)->pc)
-    return 1;
-  else
-    return 0;
-}
-
-/* Sort the abbrevs by the abbrev code.  This function is passed to
-   both qsort and bsearch.  */
-
-static int
-abbrev_compare (const void *v1, const void *v2)
-{
-  const struct abbrev *a1 = (const struct abbrev *) v1;
-  const struct abbrev *a2 = (const struct abbrev *) v2;
-
-  if (a1->code < a2->code)
-    return -1;
-  else if (a1->code > a2->code)
-    return 1;
-  else
-    {
-      /* This really shouldn't happen.  It means there are two
-	 different abbrevs with the same code, and that means we don't
-	 know which one lookup_abbrev should return.  */
-      return 0;
-    }
-}
-
-/* Read the abbreviation table for a compilation unit.  Returns 1 on
-   success, 0 on failure.  */
-
-static int
-read_abbrevs (struct backtrace_state *state, uint64_t abbrev_offset,
-	      const unsigned char *dwarf_abbrev, size_t dwarf_abbrev_size,
-	      int is_bigendian, backtrace_error_callback error_callback,
-	      void *data, struct abbrevs *abbrevs)
-{
-  struct dwarf_buf abbrev_buf;
-  struct dwarf_buf count_buf;
-  size_t num_abbrevs;
-
-  abbrevs->num_abbrevs = 0;
-  abbrevs->abbrevs = NULL;
-
-  if (abbrev_offset >= dwarf_abbrev_size)
-    {
-      error_callback (data, "abbrev offset out of range", 0);
-      return 0;
-    }
-
-  abbrev_buf.name = ".debug_abbrev";
-  abbrev_buf.start = dwarf_abbrev;
-  abbrev_buf.buf = dwarf_abbrev + abbrev_offset;
-  abbrev_buf.left = dwarf_abbrev_size - abbrev_offset;
-  abbrev_buf.is_bigendian = is_bigendian;
-  abbrev_buf.error_callback = error_callback;
-  abbrev_buf.data = data;
-  abbrev_buf.reported_underflow = 0;
-
-  /* Count the number of abbrevs in this list.  */
-
-  count_buf = abbrev_buf;
-  num_abbrevs = 0;
-  while (read_uleb128 (&count_buf) != 0)
-    {
-      if (count_buf.reported_underflow)
-	return 0;
-      ++num_abbrevs;
-      // Skip tag.
-      read_uleb128 (&count_buf);
-      // Skip has_children.
-      read_byte (&count_buf);
-      // Skip attributes.
-      while (read_uleb128 (&count_buf) != 0)
-	{
-	  uint64_t form;
-
-	  form = read_uleb128 (&count_buf);
-	  if ((enum dwarf_form) form == DW_FORM_implicit_const)
-	    read_sleb128 (&count_buf);
-	}
-      // Skip form of last attribute.
-      read_uleb128 (&count_buf);
-    }
-
-  if (count_buf.reported_underflow)
-    return 0;
-
-  if (num_abbrevs == 0)
-    return 1;
-
-  abbrevs->abbrevs = ((struct abbrev *)
-		      backtrace_alloc (state,
-				       num_abbrevs * sizeof (struct abbrev),
-				       error_callback, data));
-  if (abbrevs->abbrevs == NULL)
-    return 0;
-  abbrevs->num_abbrevs = num_abbrevs;
-  memset (abbrevs->abbrevs, 0, num_abbrevs * sizeof (struct abbrev));
-
-  num_abbrevs = 0;
-  while (1)
-    {
-      uint64_t code;
-      struct abbrev a;
-      size_t num_attrs;
-      struct attr *attrs;
-
-      if (abbrev_buf.reported_underflow)
-	goto fail;
-
-      code = read_uleb128 (&abbrev_buf);
-      if (code == 0)
-	break;
-
-      a.code = code;
-      a.tag = (enum dwarf_tag) read_uleb128 (&abbrev_buf);
-      a.has_children = read_byte (&abbrev_buf);
-
-      count_buf = abbrev_buf;
-      num_attrs = 0;
-      while (read_uleb128 (&count_buf) != 0)
-	{
-	  uint64_t form;
-
-	  ++num_attrs;
-	  form = read_uleb128 (&count_buf);
-	  if ((enum dwarf_form) form == DW_FORM_implicit_const)
-	    read_sleb128 (&count_buf);
-	}
-
-      if (num_attrs == 0)
-	{
-	  attrs = NULL;
-	  read_uleb128 (&abbrev_buf);
-	  read_uleb128 (&abbrev_buf);
-	}
-      else
-	{
-	  attrs = ((struct attr *)
-		   backtrace_alloc (state, num_attrs * sizeof *attrs,
-				    error_callback, data));
-	  if (attrs == NULL)
-	    goto fail;
-	  num_attrs = 0;
-	  while (1)
-	    {
-	      uint64_t name;
-	      uint64_t form;
-
-	      name = read_uleb128 (&abbrev_buf);
-	      form = read_uleb128 (&abbrev_buf);
-	      if (name == 0)
-		break;
-	      attrs[num_attrs].name = (enum dwarf_attribute) name;
-	      attrs[num_attrs].form = (enum dwarf_form) form;
-	      if ((enum dwarf_form) form == DW_FORM_implicit_const)
-		attrs[num_attrs].val = read_sleb128 (&abbrev_buf);
-	      else
-		attrs[num_attrs].val = 0;
-	      ++num_attrs;
-	    }
-	}
-
-      a.num_attrs = num_attrs;
-      a.attrs = attrs;
-
-      abbrevs->abbrevs[num_abbrevs] = a;
-      ++num_abbrevs;
-    }
-
-  backtrace_qsort (abbrevs->abbrevs, abbrevs->num_abbrevs,
-		   sizeof (struct abbrev), abbrev_compare);
-
-  return 1;
-
- fail:
-  free_abbrevs (state, abbrevs, error_callback, data);
-  return 0;
-}
-
-/* Return the abbrev information for an abbrev code.  */
-
-static const struct abbrev *
-lookup_abbrev (struct abbrevs *abbrevs, uint64_t code,
-	       backtrace_error_callback error_callback, void *data)
-{
-  struct abbrev key;
-  void *p;
-
-  /* With GCC, where abbrevs are simply numbered in order, we should
-     be able to just look up the entry.  */
-  if (code - 1 < abbrevs->num_abbrevs
-      && abbrevs->abbrevs[code - 1].code == code)
-    return &abbrevs->abbrevs[code - 1];
-
-  /* Otherwise we have to search.  */
-  memset (&key, 0, sizeof key);
-  key.code = code;
-  p = bsearch (&key, abbrevs->abbrevs, abbrevs->num_abbrevs,
-	       sizeof (struct abbrev), abbrev_compare);
-  if (p == NULL)
-    {
-      error_callback (data, "invalid abbreviation code", 0);
-      return NULL;
-    }
-  return (const struct abbrev *) p;
-}
-
-/* This struct is used to gather address range information while
-   reading attributes.  We use this while building a mapping from
-   address ranges to compilation units and then again while mapping
-   from address ranges to function entries.  Normally either
-   lowpc/highpc is set or ranges is set.  */
-
-struct pcrange {
-  uint64_t lowpc;		/* The low PC value.  */
-  int have_lowpc;		/* Whether a low PC value was found.  */
-  int lowpc_is_addr_index;	/* Whether lowpc is in .debug_addr.  */
-  uint64_t highpc;		/* The high PC value.  */
-  int have_highpc;		/* Whether a high PC value was found.  */
-  int highpc_is_relative;	/* Whether highpc is relative to lowpc.  */
-  int highpc_is_addr_index;	/* Whether highpc is in .debug_addr.  */
-  uint64_t ranges;		/* Offset in ranges section.  */
-  int have_ranges;		/* Whether ranges is valid.  */
-  int ranges_is_index;		/* Whether ranges is DW_FORM_rnglistx.  */
-};
-
-/* Update PCRANGE from an attribute value.  */
-
-static void
-update_pcrange (const struct attr* attr, const struct attr_val* val,
-		struct pcrange *pcrange)
-{
-  switch (attr->name)
-    {
-    case DW_AT_low_pc:
-      if (val->encoding == ATTR_VAL_ADDRESS)
-	{
-	  pcrange->lowpc = val->u.uint;
-	  pcrange->have_lowpc = 1;
-	}
-      else if (val->encoding == ATTR_VAL_ADDRESS_INDEX)
-	{
-	  pcrange->lowpc = val->u.uint;
-	  pcrange->have_lowpc = 1;
-	  pcrange->lowpc_is_addr_index = 1;
-	}
-      break;
-
-    case DW_AT_high_pc:
-      if (val->encoding == ATTR_VAL_ADDRESS)
-	{
-	  pcrange->highpc = val->u.uint;
-	  pcrange->have_highpc = 1;
-	}
-      else if (val->encoding == ATTR_VAL_UINT)
-	{
-	  pcrange->highpc = val->u.uint;
-	  pcrange->have_highpc = 1;
-	  pcrange->highpc_is_relative = 1;
-	}
-      else if (val->encoding == ATTR_VAL_ADDRESS_INDEX)
-	{
-	  pcrange->highpc = val->u.uint;
-	  pcrange->have_highpc = 1;
-	  pcrange->highpc_is_addr_index = 1;
-	}
-      break;
-
-    case DW_AT_ranges:
-      if (val->encoding == ATTR_VAL_UINT
-	  || val->encoding == ATTR_VAL_REF_SECTION)
-	{
-	  pcrange->ranges = val->u.uint;
-	  pcrange->have_ranges = 1;
-	}
-      else if (val->encoding == ATTR_VAL_RNGLISTS_INDEX)
-	{
-	  pcrange->ranges = val->u.uint;
-	  pcrange->have_ranges = 1;
-	  pcrange->ranges_is_index = 1;
-	}
-      break;
-
-    default:
-      break;
-    }
-}
-
-/* Call ADD_RANGE for a low/high PC pair.  Returns 1 on success, 0 on
-  error.  */
-
-static int
-add_low_high_range (struct backtrace_state *state,
-		    const struct dwarf_sections *dwarf_sections,
-		    uintptr_t base_address, int is_bigendian,
-		    struct unit *u, const struct pcrange *pcrange,
-		    int (*add_range) (struct backtrace_state *state,
-				      void *rdata, uint64_t lowpc,
-				      uint64_t highpc,
-				      backtrace_error_callback error_callback,
-				      void *data, void *vec),
-		    void *rdata,
-		    backtrace_error_callback error_callback, void *data,
-		    void *vec)
-{
-  uint64_t lowpc;
-  uint64_t highpc;
-
-  lowpc = pcrange->lowpc;
-  if (pcrange->lowpc_is_addr_index)
-    {
-      if (!resolve_addr_index (dwarf_sections, u->addr_base, u->addrsize,
-			       is_bigendian, lowpc, error_callback, data,
-			       &lowpc))
-	return 0;
-    }
-
-  highpc = pcrange->highpc;
-  if (pcrange->highpc_is_addr_index)
-    {
-      if (!resolve_addr_index (dwarf_sections, u->addr_base, u->addrsize,
-			       is_bigendian, highpc, error_callback, data,
-			       &highpc))
-	return 0;
-    }
-  if (pcrange->highpc_is_relative)
-    highpc += lowpc;
-
-  /* Add in the base address of the module when recording PC values,
-     so that we can look up the PC directly.  */
-  lowpc += base_address;
-  highpc += base_address;
-
-  return add_range (state, rdata, lowpc, highpc, error_callback, data, vec);
-}
-
-/* Call ADD_RANGE for each range read from .debug_ranges, as used in
-   DWARF versions 2 through 4.  */
-
-static int
-add_ranges_from_ranges (
-    struct backtrace_state *state,
-    const struct dwarf_sections *dwarf_sections,
-    uintptr_t base_address, int is_bigendian,
-    struct unit *u, uint64_t base,
-    const struct pcrange *pcrange,
-    int (*add_range) (struct backtrace_state *state, void *rdata,
-		      uint64_t lowpc, uint64_t highpc,
-		      backtrace_error_callback error_callback, void *data,
-		      void *vec),
-    void *rdata,
-    backtrace_error_callback error_callback, void *data,
-    void *vec)
-{
-  struct dwarf_buf ranges_buf;
-
-  if (pcrange->ranges >= dwarf_sections->size[DEBUG_RANGES])
-    {
-      error_callback (data, "ranges offset out of range", 0);
-      return 0;
-    }
-
-  ranges_buf.name = ".debug_ranges";
-  ranges_buf.start = dwarf_sections->data[DEBUG_RANGES];
-  ranges_buf.buf = dwarf_sections->data[DEBUG_RANGES] + pcrange->ranges;
-  ranges_buf.left = dwarf_sections->size[DEBUG_RANGES] - pcrange->ranges;
-  ranges_buf.is_bigendian = is_bigendian;
-  ranges_buf.error_callback = error_callback;
-  ranges_buf.data = data;
-  ranges_buf.reported_underflow = 0;
-
-  while (1)
-    {
-      uint64_t low;
-      uint64_t high;
-
-      if (ranges_buf.reported_underflow)
-	return 0;
-
-      low = read_address (&ranges_buf, u->addrsize);
-      high = read_address (&ranges_buf, u->addrsize);
-
-      if (low == 0 && high == 0)
-	break;
-
-      if (is_highest_address (low, u->addrsize))
-	base = high;
-      else
-	{
-	  if (!add_range (state, rdata, 
-			  low + base + base_address,
-			  high + base + base_address,
-			  error_callback, data, vec))
-	    return 0;
-	}
-    }
-
-  if (ranges_buf.reported_underflow)
-    return 0;
-
-  return 1;
-}
-
-/* Call ADD_RANGE for each range read from .debug_rnglists, as used in
-   DWARF version 5.  */
-
-static int
-add_ranges_from_rnglists (
-    struct backtrace_state *state,
-    const struct dwarf_sections *dwarf_sections,
-    uintptr_t base_address, int is_bigendian,
-    struct unit *u, uint64_t base,
-    const struct pcrange *pcrange,
-    int (*add_range) (struct backtrace_state *state, void *rdata,
-		      uint64_t lowpc, uint64_t highpc,
-		      backtrace_error_callback error_callback, void *data,
-		      void *vec),
-    void *rdata,
-    backtrace_error_callback error_callback, void *data,
-    void *vec)
-{
-  uint64_t offset;
-  struct dwarf_buf rnglists_buf;
-
-  if (!pcrange->ranges_is_index)
-    offset = pcrange->ranges;
-  else
-    offset = u->rnglists_base + pcrange->ranges * (u->is_dwarf64 ? 8 : 4);
-  if (offset >= dwarf_sections->size[DEBUG_RNGLISTS])
-    {
-      error_callback (data, "rnglists offset out of range", 0);
-      return 0;
-    }
-
-  rnglists_buf.name = ".debug_rnglists";
-  rnglists_buf.start = dwarf_sections->data[DEBUG_RNGLISTS];
-  rnglists_buf.buf = dwarf_sections->data[DEBUG_RNGLISTS] + offset;
-  rnglists_buf.left = dwarf_sections->size[DEBUG_RNGLISTS] - offset;
-  rnglists_buf.is_bigendian = is_bigendian;
-  rnglists_buf.error_callback = error_callback;
-  rnglists_buf.data = data;
-  rnglists_buf.reported_underflow = 0;
-
-  if (pcrange->ranges_is_index)
-    {
-      offset = read_offset (&rnglists_buf, u->is_dwarf64);
-      offset += u->rnglists_base;
-      if (offset >= dwarf_sections->size[DEBUG_RNGLISTS])
-	{
-	  error_callback (data, "rnglists index offset out of range", 0);
-	  return 0;
-	}
-      rnglists_buf.buf = dwarf_sections->data[DEBUG_RNGLISTS] + offset;
-      rnglists_buf.left = dwarf_sections->size[DEBUG_RNGLISTS] - offset;
-    }
-
-  while (1)
-    {
-      unsigned char rle;
-
-      rle = read_byte (&rnglists_buf);
-      if (rle == DW_RLE_end_of_list)
-	break;
-      switch (rle)
-	{
-	case DW_RLE_base_addressx:
-	  {
-	    uint64_t index;
-
-	    index = read_uleb128 (&rnglists_buf);
-	    if (!resolve_addr_index (dwarf_sections, u->addr_base,
-				     u->addrsize, is_bigendian, index,
-				     error_callback, data, &base))
-	      return 0;
-	  }
-	  break;
-
-	case DW_RLE_startx_endx:
-	  {
-	    uint64_t index;
-	    uint64_t low;
-	    uint64_t high;
-
-	    index = read_uleb128 (&rnglists_buf);
-	    if (!resolve_addr_index (dwarf_sections, u->addr_base,
-				     u->addrsize, is_bigendian, index,
-				     error_callback, data, &low))
-	      return 0;
-	    index = read_uleb128 (&rnglists_buf);
-	    if (!resolve_addr_index (dwarf_sections, u->addr_base,
-				     u->addrsize, is_bigendian, index,
-				     error_callback, data, &high))
-	      return 0;
-	    if (!add_range (state, rdata, low + base_address,
-			    high + base_address, error_callback, data,
-			    vec))
-	      return 0;
-	  }
-	  break;
-
-	case DW_RLE_startx_length:
-	  {
-	    uint64_t index;
-	    uint64_t low;
-	    uint64_t length;
-
-	    index = read_uleb128 (&rnglists_buf);
-	    if (!resolve_addr_index (dwarf_sections, u->addr_base,
-				     u->addrsize, is_bigendian, index,
-				     error_callback, data, &low))
-	      return 0;
-	    length = read_uleb128 (&rnglists_buf);
-	    low += base_address;
-	    if (!add_range (state, rdata, low, low + length,
-			    error_callback, data, vec))
-	      return 0;
-	  }
-	  break;
-
-	case DW_RLE_offset_pair:
-	  {
-	    uint64_t low;
-	    uint64_t high;
-
-	    low = read_uleb128 (&rnglists_buf);
-	    high = read_uleb128 (&rnglists_buf);
-	    if (!add_range (state, rdata, low + base + base_address,
-			    high + base + base_address,
-			    error_callback, data, vec))
-	      return 0;
-	  }
-	  break;
-
-	case DW_RLE_base_address:
-	  base = read_address (&rnglists_buf, u->addrsize);
-	  break;
-
-	case DW_RLE_start_end:
-	  {
-	    uint64_t low;
-	    uint64_t high;
-
-	    low = read_address (&rnglists_buf, u->addrsize);
-	    high = read_address (&rnglists_buf, u->addrsize);
-	    if (!add_range (state, rdata, low + base_address,
-			    high + base_address, error_callback, data,
-			    vec))
-	      return 0;
-	  }
-	  break;
-
-	case DW_RLE_start_length:
-	  {
-	    uint64_t low;
-	    uint64_t length;
-
-	    low = read_address (&rnglists_buf, u->addrsize);
-	    length = read_uleb128 (&rnglists_buf);
-	    low += base_address;
-	    if (!add_range (state, rdata, low, low + length,
-			    error_callback, data, vec))
-	      return 0;
-	  }
-	  break;
-
-	default:
-	  dwarf_buf_error (&rnglists_buf, "unrecognized DW_RLE value", -1);
-	  return 0;
-	}
-    }
-
-  if (rnglists_buf.reported_underflow)
-    return 0;
-
-  return 1;
-}
-
-/* Call ADD_RANGE for each lowpc/highpc pair in PCRANGE.  RDATA is
-   passed to ADD_RANGE, and is either a struct unit * or a struct
-   function *.  VEC is the vector we are adding ranges to, and is
-   either a struct unit_addrs_vector * or a struct function_vector *.
-   Returns 1 on success, 0 on error.  */
-
-static int
-add_ranges (struct backtrace_state *state,
-	    const struct dwarf_sections *dwarf_sections,
-	    uintptr_t base_address, int is_bigendian,
-	    struct unit *u, uint64_t base, const struct pcrange *pcrange,
-	    int (*add_range) (struct backtrace_state *state, void *rdata, 
-			      uint64_t lowpc, uint64_t highpc,
-			      backtrace_error_callback error_callback,
-			      void *data, void *vec),
-	    void *rdata,
-	    backtrace_error_callback error_callback, void *data,
-	    void *vec)
-{
-  if (pcrange->have_lowpc && pcrange->have_highpc)
-    return add_low_high_range (state, dwarf_sections, base_address,
-			       is_bigendian, u, pcrange, add_range, rdata,
-			       error_callback, data, vec);
-
-  if (!pcrange->have_ranges)
-    {
-      /* Did not find any address ranges to add.  */
-      return 1;
-    }
-
-  if (u->version < 5)
-    return add_ranges_from_ranges (state, dwarf_sections, base_address,
-				   is_bigendian, u, base, pcrange, add_range,
-				   rdata, error_callback, data, vec);
-  else
-    return add_ranges_from_rnglists (state, dwarf_sections, base_address,
-				     is_bigendian, u, base, pcrange, add_range,
-				     rdata, error_callback, data, vec);
-}
-
-/* Find the address range covered by a compilation unit, reading from
-   UNIT_BUF and adding values to U.  Returns 1 if all data could be
-   read, 0 if there is some error.  */
-
-static int
-find_address_ranges (struct backtrace_state *state, uintptr_t base_address,
-		     struct dwarf_buf *unit_buf,
-		     const struct dwarf_sections *dwarf_sections,
-		     int is_bigendian, struct dwarf_data *altlink,
-		     backtrace_error_callback error_callback, void *data,
-		     struct unit *u, struct unit_addrs_vector *addrs,
-		     enum dwarf_tag *unit_tag)
-{
-  while (unit_buf->left > 0)
-    {
-      uint64_t code;
-      const struct abbrev *abbrev;
-      struct pcrange pcrange;
-      struct attr_val name_val;
-      int have_name_val;
-      struct attr_val comp_dir_val;
-      int have_comp_dir_val;
-      size_t i;
-
-      code = read_uleb128 (unit_buf);
-      if (code == 0)
-	return 1;
-
-      abbrev = lookup_abbrev (&u->abbrevs, code, error_callback, data);
-      if (abbrev == NULL)
-	return 0;
-
-      if (unit_tag != NULL)
-	*unit_tag = abbrev->tag;
-
-      memset (&pcrange, 0, sizeof pcrange);
-      memset (&name_val, 0, sizeof name_val);
-      have_name_val = 0;
-      memset (&comp_dir_val, 0, sizeof comp_dir_val);
-      have_comp_dir_val = 0;
-      for (i = 0; i < abbrev->num_attrs; ++i)
-	{
-	  struct attr_val val;
-
-	  if (!read_attribute (abbrev->attrs[i].form, abbrev->attrs[i].val,
-			       unit_buf, u->is_dwarf64, u->version,
-			       u->addrsize, dwarf_sections, altlink, &val))
-	    return 0;
-
-	  switch (abbrev->attrs[i].name)
-	    {
-	    case DW_AT_low_pc: case DW_AT_high_pc: case DW_AT_ranges:
-	      update_pcrange (&abbrev->attrs[i], &val, &pcrange);
-	      break;
-
-	    case DW_AT_stmt_list:
-	      if ((abbrev->tag == DW_TAG_compile_unit
-		   || abbrev->tag == DW_TAG_skeleton_unit)
-		  && (val.encoding == ATTR_VAL_UINT
-		      || val.encoding == ATTR_VAL_REF_SECTION))
-		u->lineoff = val.u.uint;
-	      break;
-
-	    case DW_AT_name:
-	      if (abbrev->tag == DW_TAG_compile_unit
-		  || abbrev->tag == DW_TAG_skeleton_unit)
-		{
-		  name_val = val;
-		  have_name_val = 1;
-		}
-	      break;
-
-	    case DW_AT_comp_dir:
-	      if (abbrev->tag == DW_TAG_compile_unit
-		  || abbrev->tag == DW_TAG_skeleton_unit)
-		{
-		  comp_dir_val = val;
-		  have_comp_dir_val = 1;
-		}
-	      break;
-
-	    case DW_AT_str_offsets_base:
-	      if ((abbrev->tag == DW_TAG_compile_unit
-		   || abbrev->tag == DW_TAG_skeleton_unit)
-		  && val.encoding == ATTR_VAL_REF_SECTION)
-		u->str_offsets_base = val.u.uint;
-	      break;
-
-	    case DW_AT_addr_base:
-	      if ((abbrev->tag == DW_TAG_compile_unit
-		   || abbrev->tag == DW_TAG_skeleton_unit)
-		  && val.encoding == ATTR_VAL_REF_SECTION)
-		u->addr_base = val.u.uint;
-	      break;
-
-	    case DW_AT_rnglists_base:
-	      if ((abbrev->tag == DW_TAG_compile_unit
-		   || abbrev->tag == DW_TAG_skeleton_unit)
-		  && val.encoding == ATTR_VAL_REF_SECTION)
-		u->rnglists_base = val.u.uint;
-	      break;
-
-	    default:
-	      break;
-	    }
-	}
-
-      // Resolve strings after we're sure that we have seen
-      // DW_AT_str_offsets_base.
-      if (have_name_val)
-	{
-	  if (!resolve_string (dwarf_sections, u->is_dwarf64, is_bigendian,
-			       u->str_offsets_base, &name_val,
-			       error_callback, data, &u->filename))
-	    return 0;
-	}
-      if (have_comp_dir_val)
-	{
-	  if (!resolve_string (dwarf_sections, u->is_dwarf64, is_bigendian,
-			       u->str_offsets_base, &comp_dir_val,
-			       error_callback, data, &u->comp_dir))
-	    return 0;
-	}
-
-      if (abbrev->tag == DW_TAG_compile_unit
-	  || abbrev->tag == DW_TAG_subprogram
-	  || abbrev->tag == DW_TAG_skeleton_unit)
-	{
-	  if (!add_ranges (state, dwarf_sections, base_address,
-			   is_bigendian, u, pcrange.lowpc, &pcrange,
-			   add_unit_addr, (void *) u, error_callback, data,
-			   (void *) addrs))
-	    return 0;
-
-	  /* If we found the PC range in the DW_TAG_compile_unit or
-	     DW_TAG_skeleton_unit, we can stop now.  */
-	  if ((abbrev->tag == DW_TAG_compile_unit
-	       || abbrev->tag == DW_TAG_skeleton_unit)
-	      && (pcrange.have_ranges
-		  || (pcrange.have_lowpc && pcrange.have_highpc)))
-	    return 1;
-	}
-
-      if (abbrev->has_children)
-	{
-	  if (!find_address_ranges (state, base_address, unit_buf,
-				    dwarf_sections, is_bigendian, altlink,
-				    error_callback, data, u, addrs, NULL))
-	    return 0;
-	}
-    }
-
-  return 1;
-}
-
-/* Build a mapping from address ranges to the compilation units where
-   the line number information for that range can be found.  Returns 1
-   on success, 0 on failure.  */
-
-static int
-build_address_map (struct backtrace_state *state, uintptr_t base_address,
-		   const struct dwarf_sections *dwarf_sections,
-		   int is_bigendian, struct dwarf_data *altlink,
-		   backtrace_error_callback error_callback, void *data,
-		   struct unit_addrs_vector *addrs,
-		   struct unit_vector *unit_vec)
-{
-  struct dwarf_buf info;
-  struct backtrace_vector units;
-  size_t units_count;
-  size_t i;
-  struct unit **pu;
-  size_t unit_offset = 0;
-  struct unit_addrs *pa;
-
-  memset (&addrs->vec, 0, sizeof addrs->vec);
-  memset (&unit_vec->vec, 0, sizeof unit_vec->vec);
-  addrs->count = 0;
-  unit_vec->count = 0;
-
-  /* Read through the .debug_info section.  FIXME: Should we use the
-     .debug_aranges section?  gdb and addr2line don't use it, but I'm
-     not sure why.  */
-
-  info.name = ".debug_info";
-  info.start = dwarf_sections->data[DEBUG_INFO];
-  info.buf = info.start;
-  info.left = dwarf_sections->size[DEBUG_INFO];
-  info.is_bigendian = is_bigendian;
-  info.error_callback = error_callback;
-  info.data = data;
-  info.reported_underflow = 0;
-
-  memset (&units, 0, sizeof units);
-  units_count = 0;
-
-  while (info.left > 0)
-    {
-      const unsigned char *unit_data_start;
-      uint64_t len;
-      int is_dwarf64;
-      struct dwarf_buf unit_buf;
-      int version;
-      int unit_type;
-      uint64_t abbrev_offset;
-      int addrsize;
-      struct unit *u;
-      enum dwarf_tag unit_tag;
-
-      if (info.reported_underflow)
-	goto fail;
-
-      unit_data_start = info.buf;
-
-      len = read_initial_length (&info, &is_dwarf64);
-      unit_buf = info;
-      unit_buf.left = len;
-
-      if (!advance (&info, len))
-	goto fail;
-
-      version = read_uint16 (&unit_buf);
-      if (version < 2 || version > 5)
-	{
-	  dwarf_buf_error (&unit_buf, "unrecognized DWARF version", -1);
-	  goto fail;
-	}
-
-      if (version < 5)
-	unit_type = 0;
-      else
-	{
-	  unit_type = read_byte (&unit_buf);
-	  if (unit_type == DW_UT_type || unit_type == DW_UT_split_type)
-	    {
-	      /* This unit doesn't have anything we need.  */
-	      continue;
-	    }
-	}
-
-      pu = ((struct unit **)
-	    backtrace_vector_grow (state, sizeof (struct unit *),
-				   error_callback, data, &units));
-      if (pu == NULL)
-	  goto fail;
-
-      u = ((struct unit *)
-	   backtrace_alloc (state, sizeof *u, error_callback, data));
-      if (u == NULL)
-	goto fail;
-
-      *pu = u;
-      ++units_count;
-
-      if (version < 5)
-	addrsize = 0; /* Set below.  */
-      else
-	addrsize = read_byte (&unit_buf);
-
-      memset (&u->abbrevs, 0, sizeof u->abbrevs);
-      abbrev_offset = read_offset (&unit_buf, is_dwarf64);
-      if (!read_abbrevs (state, abbrev_offset,
-			 dwarf_sections->data[DEBUG_ABBREV],
-			 dwarf_sections->size[DEBUG_ABBREV],
-			 is_bigendian, error_callback, data, &u->abbrevs))
-	goto fail;
-
-      if (version < 5)
-	addrsize = read_byte (&unit_buf);
-
-      switch (unit_type)
-	{
-	case 0:
-	  break;
-	case DW_UT_compile: case DW_UT_partial:
-	  break;
-	case DW_UT_skeleton: case DW_UT_split_compile:
-	  read_uint64 (&unit_buf); /* dwo_id */
-	  break;
-	default:
-	  break;
-	}
-
-      u->low_offset = unit_offset;
-      unit_offset += len + (is_dwarf64 ? 12 : 4);
-      u->high_offset = unit_offset;
-      u->unit_data = unit_buf.buf;
-      u->unit_data_len = unit_buf.left;
-      u->unit_data_offset = unit_buf.buf - unit_data_start;
-      u->version = version;
-      u->is_dwarf64 = is_dwarf64;
-      u->addrsize = addrsize;
-      u->filename = NULL;
-      u->comp_dir = NULL;
-      u->abs_filename = NULL;
-      u->lineoff = 0;
-      u->str_offsets_base = 0;
-      u->addr_base = 0;
-      u->rnglists_base = 0;
-
-      /* The actual line number mappings will be read as needed.  */
-      u->lines = NULL;
-      u->lines_count = 0;
-      u->function_addrs = NULL;
-      u->function_addrs_count = 0;
-
-      if (!find_address_ranges (state, base_address, &unit_buf, dwarf_sections,
-				is_bigendian, altlink, error_callback, data,
-				u, addrs, &unit_tag))
-	goto fail;
-
-      if (unit_buf.reported_underflow)
-	goto fail;
-    }
-  if (info.reported_underflow)
-    goto fail;
-
-  /* Add a trailing addrs entry, but don't include it in addrs->count.  */
-  pa = ((struct unit_addrs *)
-	backtrace_vector_grow (state, sizeof (struct unit_addrs),
-			       error_callback, data, &addrs->vec));
-  if (pa == NULL)
-    goto fail;
-  pa->low = 0;
-  --pa->low;
-  pa->high = pa->low;
-  pa->u = NULL;
-
-  unit_vec->vec = units;
-  unit_vec->count = units_count;
-  return 1;
-
- fail:
-  if (units_count > 0)
-    {
-      pu = (struct unit **) units.base;
-      for (i = 0; i < units_count; i++)
-	{
-	  free_abbrevs (state, &pu[i]->abbrevs, error_callback, data);
-	  backtrace_free (state, pu[i], sizeof **pu, error_callback, data);
-	}
-      backtrace_vector_free (state, &units, error_callback, data);
-    }
-  if (addrs->count > 0)
-    {
-      backtrace_vector_free (state, &addrs->vec, error_callback, data);
-      addrs->count = 0;
-    }
-  return 0;
-}
-
-/* Add a new mapping to the vector of line mappings that we are
-   building.  Returns 1 on success, 0 on failure.  */
-
-static int
-add_line (struct backtrace_state *state, struct dwarf_data *ddata,
-	  uintptr_t pc, const char *filename, int lineno,
-	  backtrace_error_callback error_callback, void *data,
-	  struct line_vector *vec)
-{
-  struct line *ln;
-
-  /* If we are adding the same mapping, ignore it.  This can happen
-     when using discriminators.  */
-  if (vec->count > 0)
-    {
-      ln = (struct line *) vec->vec.base + (vec->count - 1);
-      if (pc == ln->pc && filename == ln->filename && lineno == ln->lineno)
-	return 1;
-    }
-
-  ln = ((struct line *)
-	backtrace_vector_grow (state, sizeof (struct line), error_callback,
-			       data, &vec->vec));
-  if (ln == NULL)
-    return 0;
-
-  /* Add in the base address here, so that we can look up the PC
-     directly.  */
-  ln->pc = pc + ddata->base_address;
-
-  ln->filename = filename;
-  ln->lineno = lineno;
-  ln->idx = vec->count;
-
-  ++vec->count;
-
-  return 1;
-}
-
-/* Free the line header information.  */
-
-static void
-free_line_header (struct backtrace_state *state, struct line_header *hdr,
-		  backtrace_error_callback error_callback, void *data)
-{
-  if (hdr->dirs_count != 0)
-    backtrace_free (state, hdr->dirs, hdr->dirs_count * sizeof (const char *),
-		    error_callback, data);
-  backtrace_free (state, hdr->filenames,
-		  hdr->filenames_count * sizeof (char *),
-		  error_callback, data);
-}
-
-/* Read the directories and file names for a line header for version
-   2, setting fields in HDR.  Return 1 on success, 0 on failure.  */
-
-static int
-read_v2_paths (struct backtrace_state *state, struct unit *u,
-	       struct dwarf_buf *hdr_buf, struct line_header *hdr)
-{
-  const unsigned char *p;
-  const unsigned char *pend;
-  size_t i;
-
-  /* Count the number of directory entries.  */
-  hdr->dirs_count = 0;
-  p = hdr_buf->buf;
-  pend = p + hdr_buf->left;
-  while (p < pend && *p != '\0')
-    {
-      p += strnlen((const char *) p, pend - p) + 1;
-      ++hdr->dirs_count;
-    }
-
-  /* The index of the first entry in the list of directories is 1.  Index 0 is
-     used for the current directory of the compilation.  To simplify index
-     handling, we set entry 0 to the compilation unit directory.  */
-  ++hdr->dirs_count;
-  hdr->dirs = ((const char **)
-	       backtrace_alloc (state,
-				hdr->dirs_count * sizeof (const char *),
-				hdr_buf->error_callback,
-				hdr_buf->data));
-  if (hdr->dirs == NULL)
-    return 0;
-
-  hdr->dirs[0] = u->comp_dir;
-  i = 1;
-  while (*hdr_buf->buf != '\0')
-    {
-      if (hdr_buf->reported_underflow)
-	return 0;
-
-      hdr->dirs[i] = read_string (hdr_buf);
-      if (hdr->dirs[i] == NULL)
-	return 0;
-      ++i;
-    }
-  if (!advance (hdr_buf, 1))
-    return 0;
-
-  /* Count the number of file entries.  */
-  hdr->filenames_count = 0;
-  p = hdr_buf->buf;
-  pend = p + hdr_buf->left;
-  while (p < pend && *p != '\0')
-    {
-      p += strnlen ((const char *) p, pend - p) + 1;
-      p += leb128_len (p);
-      p += leb128_len (p);
-      p += leb128_len (p);
-      ++hdr->filenames_count;
-    }
-
-  /* The index of the first entry in the list of file names is 1.  Index 0 is
-     used for the DW_AT_name of the compilation unit.  To simplify index
-     handling, we set entry 0 to the compilation unit file name.  */
-  ++hdr->filenames_count;
-  hdr->filenames = ((const char **)
-		    backtrace_alloc (state,
-				     hdr->filenames_count * sizeof (char *),
-				     hdr_buf->error_callback,
-				     hdr_buf->data));
-  if (hdr->filenames == NULL)
-    return 0;
-  hdr->filenames[0] = u->filename;
-  i = 1;
-  while (*hdr_buf->buf != '\0')
-    {
-      const char *filename;
-      uint64_t dir_index;
-
-      if (hdr_buf->reported_underflow)
-	return 0;
-
-      filename = read_string (hdr_buf);
-      if (filename == NULL)
-	return 0;
-      dir_index = read_uleb128 (hdr_buf);
-      if (IS_ABSOLUTE_PATH (filename)
-	  || (dir_index < hdr->dirs_count && hdr->dirs[dir_index] == NULL))
-	hdr->filenames[i] = filename;
-      else
-	{
-	  const char *dir;
-	  size_t dir_len;
-	  size_t filename_len;
-	  char *s;
-
-	  if (dir_index < hdr->dirs_count)
-	    dir = hdr->dirs[dir_index];
-	  else
-	    {
-	      dwarf_buf_error (hdr_buf,
-			       ("invalid directory index in "
-				"line number program header"),
-			       0);
-	      return 0;
-	    }
-	  dir_len = strlen (dir);
-	  filename_len = strlen (filename);
-	  s = ((char *) backtrace_alloc (state, dir_len + filename_len + 2,
-					 hdr_buf->error_callback,
-					 hdr_buf->data));
-	  if (s == NULL)
-	    return 0;
-	  memcpy (s, dir, dir_len);
-	  /* FIXME: If we are on a DOS-based file system, and the
-	     directory or the file name use backslashes, then we
-	     should use a backslash here.  */
-	  s[dir_len] = '/';
-	  memcpy (s + dir_len + 1, filename, filename_len + 1);
-	  hdr->filenames[i] = s;
-	}
-
-      /* Ignore the modification time and size.  */
-      read_uleb128 (hdr_buf);
-      read_uleb128 (hdr_buf);
-
-      ++i;
-    }
-
-  return 1;
-}
-
-/* Read a single version 5 LNCT entry for a directory or file name in a
-   line header.  Sets *STRING to the resulting name, ignoring other
-   data.  Return 1 on success, 0 on failure.  */
-
-static int
-read_lnct (struct backtrace_state *state, struct dwarf_data *ddata,
-	   struct unit *u, struct dwarf_buf *hdr_buf,
-	   const struct line_header *hdr, size_t formats_count,
-	   const struct line_header_format *formats, const char **string)
-{
-  size_t i;
-  const char *dir;
-  const char *path;
-
-  dir = NULL;
-  path = NULL;
-  for (i = 0; i < formats_count; i++)
-    {
-      struct attr_val val;
-
-      if (!read_attribute (formats[i].form, 0, hdr_buf, u->is_dwarf64,
-			   u->version, hdr->addrsize, &ddata->dwarf_sections,
-			   ddata->altlink, &val))
-	return 0;
-      switch (formats[i].lnct)
-	{
-	case DW_LNCT_path:
-	  if (!resolve_string (&ddata->dwarf_sections, u->is_dwarf64,
-			       ddata->is_bigendian, u->str_offsets_base,
-			       &val, hdr_buf->error_callback, hdr_buf->data,
-			       &path))
-	    return 0;
-	  break;
-	case DW_LNCT_directory_index:
-	  if (val.encoding == ATTR_VAL_UINT)
-	    {
-	      if (val.u.uint >= hdr->dirs_count)
-		{
-		  dwarf_buf_error (hdr_buf,
-				   ("invalid directory index in "
-				    "line number program header"),
-				   0);
-		  return 0;
-		}
-	      dir = hdr->dirs[val.u.uint];
-	    }
-	  break;
-	default:
-	  /* We don't care about timestamps or sizes or hashes.  */
-	  break;
-	}
-    }
-
-  if (path == NULL)
-    {
-      dwarf_buf_error (hdr_buf,
-		       "missing file name in line number program header",
-		       0);
-      return 0;
-    }
-
-  if (dir == NULL)
-    *string = path;
-  else
-    {
-      size_t dir_len;
-      size_t path_len;
-      char *s;
-
-      dir_len = strlen (dir);
-      path_len = strlen (path);
-      s = (char *) backtrace_alloc (state, dir_len + path_len + 2,
-				    hdr_buf->error_callback, hdr_buf->data);
-      if (s == NULL)
-	return 0;
-      memcpy (s, dir, dir_len);
-      /* FIXME: If we are on a DOS-based file system, and the
-	 directory or the path name use backslashes, then we should
-	 use a backslash here.  */
-      s[dir_len] = '/';
-      memcpy (s + dir_len + 1, path, path_len + 1);
-      *string = s;
-    }
-
-  return 1;
-}
-
-/* Read a set of DWARF 5 line header format entries, setting *PCOUNT
-   and *PPATHS.  Return 1 on success, 0 on failure.  */
-
-static int
-read_line_header_format_entries (struct backtrace_state *state,
-				 struct dwarf_data *ddata,
-				 struct unit *u,
-				 struct dwarf_buf *hdr_buf,
-				 struct line_header *hdr,
-				 size_t *pcount,
-				 const char ***ppaths)
-{
-  size_t formats_count;
-  struct line_header_format *formats;
-  size_t paths_count;
-  const char **paths;
-  size_t i;
-  int ret;
-
-  formats_count = read_byte (hdr_buf);
-  if (formats_count == 0)
-    formats = NULL;
-  else
-    {
-      formats = ((struct line_header_format *)
-		 backtrace_alloc (state,
-				  (formats_count
-				   * sizeof (struct line_header_format)),
-				  hdr_buf->error_callback,
-				  hdr_buf->data));
-      if (formats == NULL)
-	return 0;
-
-      for (i = 0; i < formats_count; i++)
-	{
-	  formats[i].lnct = (int) read_uleb128(hdr_buf);
-	  formats[i].form = (enum dwarf_form) read_uleb128 (hdr_buf);
-	}
-    }
-
-  paths_count = read_uleb128 (hdr_buf);
-  if (paths_count == 0)
-    {
-      *pcount = 0;
-      *ppaths = NULL;
-      ret = 1;
-      goto exit;
-    }
-
-  paths = ((const char **)
-	   backtrace_alloc (state, paths_count * sizeof (const char *),
-			    hdr_buf->error_callback, hdr_buf->data));
-  if (paths == NULL)
-    {
-      ret = 0;
-      goto exit;
-    }
-  for (i = 0; i < paths_count; i++)
-    {
-      if (!read_lnct (state, ddata, u, hdr_buf, hdr, formats_count,
-		      formats, &paths[i]))
-	{
-	  backtrace_free (state, paths,
-			  paths_count * sizeof (const char *),
-			  hdr_buf->error_callback, hdr_buf->data);
-	  ret = 0;
-	  goto exit;
-	}
-    }
-
-  *pcount = paths_count;
-  *ppaths = paths;
-
-  ret = 1;
-
- exit:
-  if (formats != NULL)
-    backtrace_free (state, formats,
-		    formats_count * sizeof (struct line_header_format),
-		    hdr_buf->error_callback, hdr_buf->data);
-
-  return  ret;
-}
-
-/* Read the line header.  Return 1 on success, 0 on failure.  */
-
-static int
-read_line_header (struct backtrace_state *state, struct dwarf_data *ddata,
-		  struct unit *u, int is_dwarf64, struct dwarf_buf *line_buf,
-		  struct line_header *hdr)
-{
-  uint64_t hdrlen;
-  struct dwarf_buf hdr_buf;
-
-  hdr->version = read_uint16 (line_buf);
-  if (hdr->version < 2 || hdr->version > 5)
-    {
-      dwarf_buf_error (line_buf, "unsupported line number version", -1);
-      return 0;
-    }
-
-  if (hdr->version < 5)
-    hdr->addrsize = u->addrsize;
-  else
-    {
-      hdr->addrsize = read_byte (line_buf);
-      /* We could support a non-zero segment_selector_size but I doubt
-	 we'll ever see it.  */
-      if (read_byte (line_buf) != 0)
-	{
-	  dwarf_buf_error (line_buf,
-			   "non-zero segment_selector_size not supported",
-			   -1);
-	  return 0;
-	}
-    }
-
-  hdrlen = read_offset (line_buf, is_dwarf64);
-
-  hdr_buf = *line_buf;
-  hdr_buf.left = hdrlen;
-
-  if (!advance (line_buf, hdrlen))
-    return 0;
-
-  hdr->min_insn_len = read_byte (&hdr_buf);
-  if (hdr->version < 4)
-    hdr->max_ops_per_insn = 1;
-  else
-    hdr->max_ops_per_insn = read_byte (&hdr_buf);
-
-  /* We don't care about default_is_stmt.  */
-  read_byte (&hdr_buf);
-
-  hdr->line_base = read_sbyte (&hdr_buf);
-  hdr->line_range = read_byte (&hdr_buf);
-
-  hdr->opcode_base = read_byte (&hdr_buf);
-  hdr->opcode_lengths = hdr_buf.buf;
-  if (!advance (&hdr_buf, hdr->opcode_base - 1))
-    return 0;
-
-  if (hdr->version < 5)
-    {
-      if (!read_v2_paths (state, u, &hdr_buf, hdr))
-	return 0;
-    }
-  else
-    {
-      if (!read_line_header_format_entries (state, ddata, u, &hdr_buf, hdr,
-					    &hdr->dirs_count,
-					    &hdr->dirs))
-	return 0;
-      if (!read_line_header_format_entries (state, ddata, u, &hdr_buf, hdr,
-					    &hdr->filenames_count,
-					    &hdr->filenames))
-	return 0;
-    }
-
-  if (hdr_buf.reported_underflow)
-    return 0;
-
-  return 1;
-}
-
-/* Read the line program, adding line mappings to VEC.  Return 1 on
-   success, 0 on failure.  */
-
-static int
-read_line_program (struct backtrace_state *state, struct dwarf_data *ddata,
-		   const struct line_header *hdr, struct dwarf_buf *line_buf,
-		   struct line_vector *vec)
-{
-  uint64_t address;
-  unsigned int op_index;
-  const char *reset_filename;
-  const char *filename;
-  int lineno;
-
-  address = 0;
-  op_index = 0;
-  if (hdr->filenames_count > 1)
-    reset_filename = hdr->filenames[1];
-  else
-    reset_filename = "";
-  filename = reset_filename;
-  lineno = 1;
-  while (line_buf->left > 0)
-    {
-      unsigned int op;
-
-      op = read_byte (line_buf);
-      if (op >= hdr->opcode_base)
-	{
-	  unsigned int advance;
-
-	  /* Special opcode.  */
-	  op -= hdr->opcode_base;
-	  advance = op / hdr->line_range;
-	  address += (hdr->min_insn_len * (op_index + advance)
-		      / hdr->max_ops_per_insn);
-	  op_index = (op_index + advance) % hdr->max_ops_per_insn;
-	  lineno += hdr->line_base + (int) (op % hdr->line_range);
-	  add_line (state, ddata, address, filename, lineno,
-		    line_buf->error_callback, line_buf->data, vec);
-	}
-      else if (op == DW_LNS_extended_op)
-	{
-	  uint64_t len;
-
-	  len = read_uleb128 (line_buf);
-	  op = read_byte (line_buf);
-	  switch (op)
-	    {
-	    case DW_LNE_end_sequence:
-	      /* FIXME: Should we mark the high PC here?  It seems
-		 that we already have that information from the
-		 compilation unit.  */
-	      address = 0;
-	      op_index = 0;
-	      filename = reset_filename;
-	      lineno = 1;
-	      break;
-	    case DW_LNE_set_address:
-	      address = read_address (line_buf, hdr->addrsize);
-	      break;
-	    case DW_LNE_define_file:
-	      {
-		const char *f;
-		unsigned int dir_index;
-
-		f = read_string (line_buf);
-		if (f == NULL)
-		  return 0;
-		dir_index = read_uleb128 (line_buf);
-		/* Ignore that time and length.  */
-		read_uleb128 (line_buf);
-		read_uleb128 (line_buf);
-		if (IS_ABSOLUTE_PATH (f))
-		  filename = f;
-		else
-		  {
-		    const char *dir;
-		    size_t dir_len;
-		    size_t f_len;
-		    char *p;
-
-		    if (dir_index < hdr->dirs_count)
-		      dir = hdr->dirs[dir_index];
-		    else
-		      {
-			dwarf_buf_error (line_buf,
-					 ("invalid directory index "
-					  "in line number program"),
-					 0);
-			return 0;
-		      }
-		    dir_len = strlen (dir);
-		    f_len = strlen (f);
-		    p = ((char *)
-			 backtrace_alloc (state, dir_len + f_len + 2,
-					  line_buf->error_callback,
-					  line_buf->data));
-		    if (p == NULL)
-		      return 0;
-		    memcpy (p, dir, dir_len);
-		    /* FIXME: If we are on a DOS-based file system,
-		       and the directory or the file name use
-		       backslashes, then we should use a backslash
-		       here.  */
-		    p[dir_len] = '/';
-		    memcpy (p + dir_len + 1, f, f_len + 1);
-		    filename = p;
-		  }
-	      }
-	      break;
-	    case DW_LNE_set_discriminator:
-	      /* We don't care about discriminators.  */
-	      read_uleb128 (line_buf);
-	      break;
-	    default:
-	      if (!advance (line_buf, len - 1))
-		return 0;
-	      break;
-	    }
-	}
-      else
-	{
-	  switch (op)
-	    {
-	    case DW_LNS_copy:
-	      add_line (state, ddata, address, filename, lineno,
-			line_buf->error_callback, line_buf->data, vec);
-	      break;
-	    case DW_LNS_advance_pc:
-	      {
-		uint64_t advance;
-
-		advance = read_uleb128 (line_buf);
-		address += (hdr->min_insn_len * (op_index + advance)
-			    / hdr->max_ops_per_insn);
-		op_index = (op_index + advance) % hdr->max_ops_per_insn;
-	      }
-	      break;
-	    case DW_LNS_advance_line:
-	      lineno += (int) read_sleb128 (line_buf);
-	      break;
-	    case DW_LNS_set_file:
-	      {
-		uint64_t fileno;
-
-		fileno = read_uleb128 (line_buf);
-		if (fileno >= hdr->filenames_count)
-		  {
-		    dwarf_buf_error (line_buf,
-				     ("invalid file number in "
-				      "line number program"),
-				     0);
-		    return 0;
-		  }
-		filename = hdr->filenames[fileno];
-	      }
-	      break;
-	    case DW_LNS_set_column:
-	      read_uleb128 (line_buf);
-	      break;
-	    case DW_LNS_negate_stmt:
-	      break;
-	    case DW_LNS_set_basic_block:
-	      break;
-	    case DW_LNS_const_add_pc:
-	      {
-		unsigned int advance;
-
-		op = 255 - hdr->opcode_base;
-		advance = op / hdr->line_range;
-		address += (hdr->min_insn_len * (op_index + advance)
-			    / hdr->max_ops_per_insn);
-		op_index = (op_index + advance) % hdr->max_ops_per_insn;
-	      }
-	      break;
-	    case DW_LNS_fixed_advance_pc:
-	      address += read_uint16 (line_buf);
-	      op_index = 0;
-	      break;
-	    case DW_LNS_set_prologue_end:
-	      break;
-	    case DW_LNS_set_epilogue_begin:
-	      break;
-	    case DW_LNS_set_isa:
-	      read_uleb128 (line_buf);
-	      break;
-	    default:
-	      {
-		unsigned int i;
-
-		for (i = hdr->opcode_lengths[op - 1]; i > 0; --i)
-		  read_uleb128 (line_buf);
-	      }
-	      break;
-	    }
-	}
-    }
-
-  return 1;
-}
-
-/* Read the line number information for a compilation unit.  Returns 1
-   on success, 0 on failure.  */
-
-static int
-read_line_info (struct backtrace_state *state, struct dwarf_data *ddata,
-		backtrace_error_callback error_callback, void *data,
-		struct unit *u, struct line_header *hdr, struct line **lines,
-		size_t *lines_count)
-{
-  struct line_vector vec;
-  struct dwarf_buf line_buf;
-  uint64_t len;
-  int is_dwarf64;
-  struct line *ln;
-
-  memset (&vec.vec, 0, sizeof vec.vec);
-  vec.count = 0;
-
-  memset (hdr, 0, sizeof *hdr);
-
-  if (u->lineoff != (off_t) (size_t) u->lineoff
-      || (size_t) u->lineoff >= ddata->dwarf_sections.size[DEBUG_LINE])
-    {
-      error_callback (data, "unit line offset out of range", 0);
-      goto fail;
-    }
-
-  line_buf.name = ".debug_line";
-  line_buf.start = ddata->dwarf_sections.data[DEBUG_LINE];
-  line_buf.buf = ddata->dwarf_sections.data[DEBUG_LINE] + u->lineoff;
-  line_buf.left = ddata->dwarf_sections.size[DEBUG_LINE] - u->lineoff;
-  line_buf.is_bigendian = ddata->is_bigendian;
-  line_buf.error_callback = error_callback;
-  line_buf.data = data;
-  line_buf.reported_underflow = 0;
-
-  len = read_initial_length (&line_buf, &is_dwarf64);
-  line_buf.left = len;
-
-  if (!read_line_header (state, ddata, u, is_dwarf64, &line_buf, hdr))
-    goto fail;
-
-  if (!read_line_program (state, ddata, hdr, &line_buf, &vec))
-    goto fail;
-
-  if (line_buf.reported_underflow)
-    goto fail;
-
-  if (vec.count == 0)
-    {
-      /* This is not a failure in the sense of a generating an error,
-	 but it is a failure in that sense that we have no useful
-	 information.  */
-      goto fail;
-    }
-
-  /* Allocate one extra entry at the end.  */
-  ln = ((struct line *)
-	backtrace_vector_grow (state, sizeof (struct line), error_callback,
-			       data, &vec.vec));
-  if (ln == NULL)
-    goto fail;
-  ln->pc = (uintptr_t) -1;
-  ln->filename = NULL;
-  ln->lineno = 0;
-  ln->idx = 0;
-
-  if (!backtrace_vector_release (state, &vec.vec, error_callback, data))
-    goto fail;
-
-  ln = (struct line *) vec.vec.base;
-  backtrace_qsort (ln, vec.count, sizeof (struct line), line_compare);
-
-  *lines = ln;
-  *lines_count = vec.count;
-
-  return 1;
-
- fail:
-  backtrace_vector_free (state, &vec.vec, error_callback, data);
-  free_line_header (state, hdr, error_callback, data);
-  *lines = (struct line *) (uintptr_t) -1;
-  *lines_count = 0;
-  return 0;
-}
-
-static const char *read_referenced_name (struct dwarf_data *, struct unit *,
-					 uint64_t, backtrace_error_callback,
-					 void *);
-
-/* Read the name of a function from a DIE referenced by ATTR with VAL.  */
-
-static const char *
-read_referenced_name_from_attr (struct dwarf_data *ddata, struct unit *u,
-				struct attr *attr, struct attr_val *val,
-				backtrace_error_callback error_callback,
-				void *data)
-{
-  switch (attr->name)
-    {
-    case DW_AT_abstract_origin:
-    case DW_AT_specification:
-      break;
-    default:
-      return NULL;
-    }
-
-  if (attr->form == DW_FORM_ref_sig8)
-    return NULL;
-
-  if (val->encoding == ATTR_VAL_REF_INFO)
-    {
-      struct unit *unit
-	= find_unit (ddata->units, ddata->units_count,
-		     val->u.uint);
-      if (unit == NULL)
-	return NULL;
-
-      uint64_t offset = val->u.uint - unit->low_offset;
-      return read_referenced_name (ddata, unit, offset, error_callback, data);
-    }
-
-  if (val->encoding == ATTR_VAL_UINT
-      || val->encoding == ATTR_VAL_REF_UNIT)
-    return read_referenced_name (ddata, u, val->u.uint, error_callback, data);
-
-  if (val->encoding == ATTR_VAL_REF_ALT_INFO)
-    {
-      struct unit *alt_unit
-	= find_unit (ddata->altlink->units, ddata->altlink->units_count,
-		     val->u.uint);
-      if (alt_unit == NULL)
-	return NULL;
-
-      uint64_t offset = val->u.uint - alt_unit->low_offset;
-      return read_referenced_name (ddata->altlink, alt_unit, offset,
-				   error_callback, data);
-    }
-
-  return NULL;
-}
-
-/* Read the name of a function from a DIE referenced by a
-   DW_AT_abstract_origin or DW_AT_specification tag.  OFFSET is within
-   the same compilation unit.  */
-
-static const char *
-read_referenced_name (struct dwarf_data *ddata, struct unit *u,
-		      uint64_t offset, backtrace_error_callback error_callback,
-		      void *data)
-{
-  struct dwarf_buf unit_buf;
-  uint64_t code;
-  const struct abbrev *abbrev;
-  const char *ret;
-  size_t i;
-
-  /* OFFSET is from the start of the data for this compilation unit.
-     U->unit_data is the data, but it starts U->unit_data_offset bytes
-     from the beginning.  */
-
-  if (offset < u->unit_data_offset
-      || offset - u->unit_data_offset >= u->unit_data_len)
-    {
-      error_callback (data,
-		      "abstract origin or specification out of range",
-		      0);
-      return NULL;
-    }
-
-  offset -= u->unit_data_offset;
-
-  unit_buf.name = ".debug_info";
-  unit_buf.start = ddata->dwarf_sections.data[DEBUG_INFO];
-  unit_buf.buf = u->unit_data + offset;
-  unit_buf.left = u->unit_data_len - offset;
-  unit_buf.is_bigendian = ddata->is_bigendian;
-  unit_buf.error_callback = error_callback;
-  unit_buf.data = data;
-  unit_buf.reported_underflow = 0;
-
-  code = read_uleb128 (&unit_buf);
-  if (code == 0)
-    {
-      dwarf_buf_error (&unit_buf,
-		       "invalid abstract origin or specification",
-		       0);
-      return NULL;
-    }
-
-  abbrev = lookup_abbrev (&u->abbrevs, code, error_callback, data);
-  if (abbrev == NULL)
-    return NULL;
-
-  ret = NULL;
-  for (i = 0; i < abbrev->num_attrs; ++i)
-    {
-      struct attr_val val;
-
-      if (!read_attribute (abbrev->attrs[i].form, abbrev->attrs[i].val,
-			   &unit_buf, u->is_dwarf64, u->version, u->addrsize,
-			   &ddata->dwarf_sections, ddata->altlink, &val))
-	return NULL;
-
-      switch (abbrev->attrs[i].name)
-	{
-	case DW_AT_name:
-	  /* Third name preference: don't override.  A name we found in some
-	     other way, will normally be more useful -- e.g., this name is
-	     normally not mangled.  */
-	  if (ret != NULL)
-	    break;
-	  if (!resolve_string (&ddata->dwarf_sections, u->is_dwarf64,
-			       ddata->is_bigendian, u->str_offsets_base,
-			       &val, error_callback, data, &ret))
-	    return NULL;
-	  break;
-
-	case DW_AT_linkage_name:
-	case DW_AT_MIPS_linkage_name:
-	  /* First name preference: override all.  */
-	  {
-	    const char *s;
-
-	    s = NULL;
-	    if (!resolve_string (&ddata->dwarf_sections, u->is_dwarf64,
-				 ddata->is_bigendian, u->str_offsets_base,
-				 &val, error_callback, data, &s))
-	      return NULL;
-	    if (s != NULL)
-	      return s;
-	  }
-	  break;
-
-	case DW_AT_specification:
-	  /* Second name preference: override DW_AT_name, don't override
-	     DW_AT_linkage_name.  */
-	  {
-	    const char *name;
-
-	    name = read_referenced_name_from_attr (ddata, u, &abbrev->attrs[i],
-						   &val, error_callback, data);
-	    if (name != NULL)
-	      ret = name;
-	  }
-	  break;
-
-	default:
-	  break;
-	}
-    }
-
-  return ret;
-}
-
-/* Add a range to a unit that maps to a function.  This is called via
-   add_ranges.  Returns 1 on success, 0 on error.  */
-
-static int
-add_function_range (struct backtrace_state *state, void *rdata,
-		    uint64_t lowpc, uint64_t highpc,
-		    backtrace_error_callback error_callback, void *data,
-		    void *pvec)
-{
-  struct function *function = (struct function *) rdata;
-  struct function_vector *vec = (struct function_vector *) pvec;
-  struct function_addrs *p;
-
-  if (vec->count > 0)
-    {
-      p = (struct function_addrs *) vec->vec.base + (vec->count - 1);
-      if ((lowpc == p->high || lowpc == p->high + 1)
-	  && function == p->function)
-	{
-	  if (highpc > p->high)
-	    p->high = highpc;
-	  return 1;
-	}
-    }
-
-  p = ((struct function_addrs *)
-       backtrace_vector_grow (state, sizeof (struct function_addrs),
-			      error_callback, data, &vec->vec));
-  if (p == NULL)
-    return 0;
-
-  p->low = lowpc;
-  p->high = highpc;
-  p->function = function;
-
-  ++vec->count;
-
-  return 1;
-}
-
-/* Read one entry plus all its children.  Add function addresses to
-   VEC.  Returns 1 on success, 0 on error.  */
-
-static int
-read_function_entry (struct backtrace_state *state, struct dwarf_data *ddata,
-		     struct unit *u, uint64_t base, struct dwarf_buf *unit_buf,
-		     const struct line_header *lhdr,
-		     backtrace_error_callback error_callback, void *data,
-		     struct function_vector *vec_function,
-		     struct function_vector *vec_inlined)
-{
-  while (unit_buf->left > 0)
-    {
-      uint64_t code;
-      const struct abbrev *abbrev;
-      int is_function;
-      struct function *function;
-      struct function_vector *vec;
-      size_t i;
-      struct pcrange pcrange;
-      int have_linkage_name;
-
-      code = read_uleb128 (unit_buf);
-      if (code == 0)
-	return 1;
-
-      abbrev = lookup_abbrev (&u->abbrevs, code, error_callback, data);
-      if (abbrev == NULL)
-	return 0;
-
-      is_function = (abbrev->tag == DW_TAG_subprogram
-		     || abbrev->tag == DW_TAG_entry_point
-		     || abbrev->tag == DW_TAG_inlined_subroutine);
-
-      if (abbrev->tag == DW_TAG_inlined_subroutine)
-	vec = vec_inlined;
-      else
-	vec = vec_function;
-
-      function = NULL;
-      if (is_function)
-	{
-	  function = ((struct function *)
-		      backtrace_alloc (state, sizeof *function,
-				       error_callback, data));
-	  if (function == NULL)
-	    return 0;
-	  memset (function, 0, sizeof *function);
-	}
-
-      memset (&pcrange, 0, sizeof pcrange);
-      have_linkage_name = 0;
-      for (i = 0; i < abbrev->num_attrs; ++i)
-	{
-	  struct attr_val val;
-
-	  if (!read_attribute (abbrev->attrs[i].form, abbrev->attrs[i].val,
-			       unit_buf, u->is_dwarf64, u->version,
-			       u->addrsize, &ddata->dwarf_sections,
-			       ddata->altlink, &val))
-	    return 0;
-
-	  /* The compile unit sets the base address for any address
-	     ranges in the function entries.  */
-	  if ((abbrev->tag == DW_TAG_compile_unit
-	       || abbrev->tag == DW_TAG_skeleton_unit)
-	      && abbrev->attrs[i].name == DW_AT_low_pc)
-	    {
-	      if (val.encoding == ATTR_VAL_ADDRESS)
-		base = val.u.uint;
-	      else if (val.encoding == ATTR_VAL_ADDRESS_INDEX)
-		{
-		  if (!resolve_addr_index (&ddata->dwarf_sections,
-					   u->addr_base, u->addrsize,
-					   ddata->is_bigendian, val.u.uint,
-					   error_callback, data, &base))
-		    return 0;
-		}
-	    }
-
-	  if (is_function)
-	    {
-	      switch (abbrev->attrs[i].name)
-		{
-		case DW_AT_call_file:
-		  if (val.encoding == ATTR_VAL_UINT)
-		    {
-		      if (val.u.uint >= lhdr->filenames_count)
-			{
-			  dwarf_buf_error (unit_buf,
-					   ("invalid file number in "
-					    "DW_AT_call_file attribute"),
-					   0);
-			  return 0;
-			}
-		      function->caller_filename = lhdr->filenames[val.u.uint];
-		    }
-		  break;
-
-		case DW_AT_call_line:
-		  if (val.encoding == ATTR_VAL_UINT)
-		    function->caller_lineno = val.u.uint;
-		  break;
-
-		case DW_AT_abstract_origin:
-		case DW_AT_specification:
-		  /* Second name preference: override DW_AT_name, don't override
-		     DW_AT_linkage_name.  */
-		  if (have_linkage_name)
-		    break;
-		  {
-		    const char *name;
-
-		    name
-		      = read_referenced_name_from_attr (ddata, u,
-							&abbrev->attrs[i], &val,
-							error_callback, data);
-		    if (name != NULL)
-		      function->name = name;
-		  }
-		  break;
-
-		case DW_AT_name:
-		  /* Third name preference: don't override.  */
-		  if (function->name != NULL)
-		    break;
-		  if (!resolve_string (&ddata->dwarf_sections, u->is_dwarf64,
-				       ddata->is_bigendian,
-				       u->str_offsets_base, &val,
-				       error_callback, data, &function->name))
-		    return 0;
-		  break;
-
-		case DW_AT_linkage_name:
-		case DW_AT_MIPS_linkage_name:
-		  /* First name preference: override all.  */
-		  {
-		    const char *s;
-
-		    s = NULL;
-		    if (!resolve_string (&ddata->dwarf_sections, u->is_dwarf64,
-					 ddata->is_bigendian,
-					 u->str_offsets_base, &val,
-					 error_callback, data, &s))
-		      return 0;
-		    if (s != NULL)
-		      {
-			function->name = s;
-			have_linkage_name = 1;
-		      }
-		  }
-		  break;
-
-		case DW_AT_low_pc: case DW_AT_high_pc: case DW_AT_ranges:
-		  update_pcrange (&abbrev->attrs[i], &val, &pcrange);
-		  break;
-
-		default:
-		  break;
-		}
-	    }
-	}
-
-      /* If we couldn't find a name for the function, we have no use
-	 for it.  */
-      if (is_function && function->name == NULL)
-	{
-	  backtrace_free (state, function, sizeof *function,
-			  error_callback, data);
-	  is_function = 0;
-	}
-
-      if (is_function)
-	{
-	  if (pcrange.have_ranges
-	      || (pcrange.have_lowpc && pcrange.have_highpc))
-	    {
-	      if (!add_ranges (state, &ddata->dwarf_sections,
-			       ddata->base_address, ddata->is_bigendian,
-			       u, base, &pcrange, add_function_range,
-			       (void *) function, error_callback, data,
-			       (void *) vec))
-		return 0;
-	    }
-	  else
-	    {
-	      backtrace_free (state, function, sizeof *function,
-			      error_callback, data);
-	      is_function = 0;
-	    }
-	}
-
-      if (abbrev->has_children)
-	{
-	  if (!is_function)
-	    {
-	      if (!read_function_entry (state, ddata, u, base, unit_buf, lhdr,
-					error_callback, data, vec_function,
-					vec_inlined))
-		return 0;
-	    }
-	  else
-	    {
-	      struct function_vector fvec;
-
-	      /* Gather any information for inlined functions in
-		 FVEC.  */
-
-	      memset (&fvec, 0, sizeof fvec);
-
-	      if (!read_function_entry (state, ddata, u, base, unit_buf, lhdr,
-					error_callback, data, vec_function,
-					&fvec))
-		return 0;
-
-	      if (fvec.count > 0)
-		{
-		  struct function_addrs *p;
-		  struct function_addrs *faddrs;
-
-		  /* Allocate a trailing entry, but don't include it
-		     in fvec.count.  */
-		  p = ((struct function_addrs *)
-		       backtrace_vector_grow (state,
-					      sizeof (struct function_addrs),
-					      error_callback, data,
-					      &fvec.vec));
-		  if (p == NULL)
-		    return 0;
-		  p->low = 0;
-		  --p->low;
-		  p->high = p->low;
-		  p->function = NULL;
-
-		  if (!backtrace_vector_release (state, &fvec.vec,
-						 error_callback, data))
-		    return 0;
-
-		  faddrs = (struct function_addrs *) fvec.vec.base;
-		  backtrace_qsort (faddrs, fvec.count,
-				   sizeof (struct function_addrs),
-				   function_addrs_compare);
-
-		  function->function_addrs = faddrs;
-		  function->function_addrs_count = fvec.count;
-		}
-	    }
-	}
-    }
-
-  return 1;
-}
-
-/* Read function name information for a compilation unit.  We look
-   through the whole unit looking for function tags.  */
-
-static void
-read_function_info (struct backtrace_state *state, struct dwarf_data *ddata,
-		    const struct line_header *lhdr,
-		    backtrace_error_callback error_callback, void *data,
-		    struct unit *u, struct function_vector *fvec,
-		    struct function_addrs **ret_addrs,
-		    size_t *ret_addrs_count)
-{
-  struct function_vector lvec;
-  struct function_vector *pfvec;
-  struct dwarf_buf unit_buf;
-  struct function_addrs *p;
-  struct function_addrs *addrs;
-  size_t addrs_count;
-
-  /* Use FVEC if it is not NULL.  Otherwise use our own vector.  */
-  if (fvec != NULL)
-    pfvec = fvec;
-  else
-    {
-      memset (&lvec, 0, sizeof lvec);
-      pfvec = &lvec;
-    }
-
-  unit_buf.name = ".debug_info";
-  unit_buf.start = ddata->dwarf_sections.data[DEBUG_INFO];
-  unit_buf.buf = u->unit_data;
-  unit_buf.left = u->unit_data_len;
-  unit_buf.is_bigendian = ddata->is_bigendian;
-  unit_buf.error_callback = error_callback;
-  unit_buf.data = data;
-  unit_buf.reported_underflow = 0;
-
-  while (unit_buf.left > 0)
-    {
-      if (!read_function_entry (state, ddata, u, 0, &unit_buf, lhdr,
-				error_callback, data, pfvec, pfvec))
-	return;
-    }
-
-  if (pfvec->count == 0)
-    return;
-
-  /* Allocate a trailing entry, but don't include it in
-     pfvec->count.  */
-  p = ((struct function_addrs *)
-       backtrace_vector_grow (state, sizeof (struct function_addrs),
-			      error_callback, data, &pfvec->vec));
-  if (p == NULL)
-    return;
-  p->low = 0;
-  --p->low;
-  p->high = p->low;
-  p->function = NULL;
-
-  addrs_count = pfvec->count;
-
-  if (fvec == NULL)
-    {
-      if (!backtrace_vector_release (state, &lvec.vec, error_callback, data))
-	return;
-      addrs = (struct function_addrs *) pfvec->vec.base;
-    }
-  else
-    {
-      /* Finish this list of addresses, but leave the remaining space in
-	 the vector available for the next function unit.  */
-      addrs = ((struct function_addrs *)
-	       backtrace_vector_finish (state, &fvec->vec,
-					error_callback, data));
-      if (addrs == NULL)
-	return;
-      fvec->count = 0;
-    }
-
-  backtrace_qsort (addrs, addrs_count, sizeof (struct function_addrs),
-		   function_addrs_compare);
-
-  *ret_addrs = addrs;
-  *ret_addrs_count = addrs_count;
-}
-
-/* See if PC is inlined in FUNCTION.  If it is, print out the inlined
-   information, and update FILENAME and LINENO for the caller.
-   Returns whatever CALLBACK returns, or 0 to keep going.  */
-
-static int
-report_inlined_functions (uintptr_t pc, struct function *function,
-			  backtrace_full_callback callback, void *data,
-			  const char **filename, int *lineno)
-{
-  struct function_addrs *p;
-  struct function_addrs *match;
-  struct function *inlined;
-  int ret;
-
-  if (function->function_addrs_count == 0)
-    return 0;
-
-  /* Our search isn't safe if pc == -1, as that is the sentinel
-     value.  */
-  if (pc + 1 == 0)
-    return 0;
-
-  p = ((struct function_addrs *)
-       bsearch (&pc, function->function_addrs,
-		function->function_addrs_count,
-		sizeof (struct function_addrs),
-		function_addrs_search));
-  if (p == NULL)
-    return 0;
-
-  /* Here pc >= p->low && pc < (p + 1)->low.  The function_addrs are
-     sorted by low, so if pc > p->low we are at the end of a range of
-     function_addrs with the same low value.  If pc == p->low walk
-     forward to the end of the range with that low value.  Then walk
-     backward and use the first range that includes pc.  */
-  while (pc == (p + 1)->low)
-    ++p;
-  match = NULL;
-  while (1)
-    {
-      if (pc < p->high)
-	{
-	  match = p;
-	  break;
-	}
-      if (p == function->function_addrs)
-	break;
-      if ((p - 1)->low < p->low)
-	break;
-      --p;
-    }
-  if (match == NULL)
-    return 0;
-
-  /* We found an inlined call.  */
-
-  inlined = match->function;
-
-  /* Report any calls inlined into this one.  */
-  ret = report_inlined_functions (pc, inlined, callback, data,
-				  filename, lineno);
-  if (ret != 0)
-    return ret;
-
-  /* Report this inlined call.  */
-  ret = callback (data, pc, *filename, *lineno, inlined->name);
-  if (ret != 0)
-    return ret;
-
-  /* Our caller will report the caller of the inlined function; tell
-     it the appropriate filename and line number.  */
-  *filename = inlined->caller_filename;
-  *lineno = inlined->caller_lineno;
-
-  return 0;
-}
-
-/* Look for a PC in the DWARF mapping for one module.  On success,
-   call CALLBACK and return whatever it returns.  On error, call
-   ERROR_CALLBACK and return 0.  Sets *FOUND to 1 if the PC is found,
-   0 if not.  */
-
-static int
-dwarf_lookup_pc (struct backtrace_state *state, struct dwarf_data *ddata,
-		 uintptr_t pc, backtrace_full_callback callback,
-		 backtrace_error_callback error_callback, void *data,
-		 int *found)
-{
-  struct unit_addrs *entry;
-  int found_entry;
-  struct unit *u;
-  int new_data;
-  struct line *lines;
-  struct line *ln;
-  struct function_addrs *p;
-  struct function_addrs *fmatch;
-  struct function *function;
-  const char *filename;
-  int lineno;
-  int ret;
-
-  *found = 1;
-
-  /* Find an address range that includes PC.  Our search isn't safe if
-     PC == -1, as we use that as a sentinel value, so skip the search
-     in that case.  */
-  entry = (ddata->addrs_count == 0 || pc + 1 == 0
-	   ? NULL
-	   : bsearch (&pc, ddata->addrs, ddata->addrs_count,
-		      sizeof (struct unit_addrs), unit_addrs_search));
-
-  if (entry == NULL)
-    {
-      *found = 0;
-      return 0;
-    }
-
-  /* Here pc >= entry->low && pc < (entry + 1)->low.  The unit_addrs
-     are sorted by low, so if pc > p->low we are at the end of a range
-     of unit_addrs with the same low value.  If pc == p->low walk
-     forward to the end of the range with that low value.  Then walk
-     backward and use the first range that includes pc.  */
-  while (pc == (entry + 1)->low)
-    ++entry;
-  found_entry = 0;
-  while (1)
-    {
-      if (pc < entry->high)
-	{
-	  found_entry = 1;
-	  break;
-	}
-      if (entry == ddata->addrs)
-	break;
-      if ((entry - 1)->low < entry->low)
-	break;
-      --entry;
-    }
-  if (!found_entry)
-    {
-      *found = 0;
-      return 0;
-    }
-
-  /* We need the lines, lines_count, function_addrs,
-     function_addrs_count fields of u.  If they are not set, we need
-     to set them.  When running in threaded mode, we need to allow for
-     the possibility that some other thread is setting them
-     simultaneously.  */
-
-  u = entry->u;
-  lines = u->lines;
-
-  /* Skip units with no useful line number information by walking
-     backward.  Useless line number information is marked by setting
-     lines == -1.  */
-  while (entry > ddata->addrs
-	 && pc >= (entry - 1)->low
-	 && pc < (entry - 1)->high)
-    {
-      if (state->threaded)
-	lines = (struct line *) backtrace_atomic_load_pointer (&u->lines);
-
-      if (lines != (struct line *) (uintptr_t) -1)
-	break;
-
-      --entry;
-
-      u = entry->u;
-      lines = u->lines;
-    }
-
-  if (state->threaded)
-    lines = backtrace_atomic_load_pointer (&u->lines);
-
-  new_data = 0;
-  if (lines == NULL)
-    {
-      struct function_addrs *function_addrs;
-      size_t function_addrs_count;
-      struct line_header lhdr;
-      size_t count;
-
-      /* We have never read the line information for this unit.  Read
-	 it now.  */
-
-      function_addrs = NULL;
-      function_addrs_count = 0;
-      if (read_line_info (state, ddata, error_callback, data, entry->u, &lhdr,
-			  &lines, &count))
-	{
-	  struct function_vector *pfvec;
-
-	  /* If not threaded, reuse DDATA->FVEC for better memory
-	     consumption.  */
-	  if (state->threaded)
-	    pfvec = NULL;
-	  else
-	    pfvec = &ddata->fvec;
-	  read_function_info (state, ddata, &lhdr, error_callback, data,
-			      entry->u, pfvec, &function_addrs,
-			      &function_addrs_count);
-	  free_line_header (state, &lhdr, error_callback, data);
-	  new_data = 1;
-	}
-
-      /* Atomically store the information we just read into the unit.
-	 If another thread is simultaneously writing, it presumably
-	 read the same information, and we don't care which one we
-	 wind up with; we just leak the other one.  We do have to
-	 write the lines field last, so that the acquire-loads above
-	 ensure that the other fields are set.  */
-
-      if (!state->threaded)
-	{
-	  u->lines_count = count;
-	  u->function_addrs = function_addrs;
-	  u->function_addrs_count = function_addrs_count;
-	  u->lines = lines;
-	}
-      else
-	{
-	  backtrace_atomic_store_size_t (&u->lines_count, count);
-	  backtrace_atomic_store_pointer (&u->function_addrs, function_addrs);
-	  backtrace_atomic_store_size_t (&u->function_addrs_count,
-					 function_addrs_count);
-	  backtrace_atomic_store_pointer (&u->lines, lines);
-	}
-    }
-
-  /* Now all fields of U have been initialized.  */
-
-  if (lines == (struct line *) (uintptr_t) -1)
-    {
-      /* If reading the line number information failed in some way,
-	 try again to see if there is a better compilation unit for
-	 this PC.  */
-      if (new_data)
-	return dwarf_lookup_pc (state, ddata, pc, callback, error_callback,
-				data, found);
-      return callback (data, pc, NULL, 0, NULL);
-    }
-
-  /* Search for PC within this unit.  */
-
-  ln = (struct line *) bsearch (&pc, lines, entry->u->lines_count,
-				sizeof (struct line), line_search);
-  if (ln == NULL)
-    {
-      /* The PC is between the low_pc and high_pc attributes of the
-	 compilation unit, but no entry in the line table covers it.
-	 This implies that the start of the compilation unit has no
-	 line number information.  */
-
-      if (entry->u->abs_filename == NULL)
-	{
-	  const char *filename;
-
-	  filename = entry->u->filename;
-	  if (filename != NULL
-	      && !IS_ABSOLUTE_PATH (filename)
-	      && entry->u->comp_dir != NULL)
-	    {
-	      size_t filename_len;
-	      const char *dir;
-	      size_t dir_len;
-	      char *s;
-
-	      filename_len = strlen (filename);
-	      dir = entry->u->comp_dir;
-	      dir_len = strlen (dir);
-	      s = (char *) backtrace_alloc (state, dir_len + filename_len + 2,
-					    error_callback, data);
-	      if (s == NULL)
-		{
-		  *found = 0;
-		  return 0;
-		}
-	      memcpy (s, dir, dir_len);
-	      /* FIXME: Should use backslash if DOS file system.  */
-	      s[dir_len] = '/';
-	      memcpy (s + dir_len + 1, filename, filename_len + 1);
-	      filename = s;
-	    }
-	  entry->u->abs_filename = filename;
-	}
-
-      return callback (data, pc, entry->u->abs_filename, 0, NULL);
-    }
-
-  /* Search for function name within this unit.  */
-
-  if (entry->u->function_addrs_count == 0)
-    return callback (data, pc, ln->filename, ln->lineno, NULL);
-
-  p = ((struct function_addrs *)
-       bsearch (&pc, entry->u->function_addrs,
-		entry->u->function_addrs_count,
-		sizeof (struct function_addrs),
-		function_addrs_search));
-  if (p == NULL)
-    return callback (data, pc, ln->filename, ln->lineno, NULL);
-
-  /* Here pc >= p->low && pc < (p + 1)->low.  The function_addrs are
-     sorted by low, so if pc > p->low we are at the end of a range of
-     function_addrs with the same low value.  If pc == p->low walk
-     forward to the end of the range with that low value.  Then walk
-     backward and use the first range that includes pc.  */
-  while (pc == (p + 1)->low)
-    ++p;
-  fmatch = NULL;
-  while (1)
-    {
-      if (pc < p->high)
-	{
-	  fmatch = p;
-	  break;
-	}
-      if (p == entry->u->function_addrs)
-	break;
-      if ((p - 1)->low < p->low)
-	break;
-      --p;
-    }
-  if (fmatch == NULL)
-    return callback (data, pc, ln->filename, ln->lineno, NULL);
-
-  function = fmatch->function;
-
-  filename = ln->filename;
-  lineno = ln->lineno;
-
-  ret = report_inlined_functions (pc, function, callback, data,
-				  &filename, &lineno);
-  if (ret != 0)
-    return ret;
-
-  return callback (data, pc, filename, lineno, function->name);
-}
-
-
-/* Return the file/line information for a PC using the DWARF mapping
-   we built earlier.  */
-
-static int
-dwarf_fileline (struct backtrace_state *state, uintptr_t pc,
-		backtrace_full_callback callback,
-		backtrace_error_callback error_callback, void *data)
-{
-  struct dwarf_data *ddata;
-  int found;
-  int ret;
-
-  if (!state->threaded)
-    {
-      for (ddata = (struct dwarf_data *) state->fileline_data;
-	   ddata != NULL;
-	   ddata = ddata->next)
-	{
-	  ret = dwarf_lookup_pc (state, ddata, pc, callback, error_callback,
-				 data, &found);
-	  if (ret != 0 || found)
-	    return ret;
-	}
-    }
-  else
-    {
-      struct dwarf_data **pp;
-
-      pp = (struct dwarf_data **) (void *) &state->fileline_data;
-      while (1)
-	{
-	  ddata = backtrace_atomic_load_pointer (pp);
-	  if (ddata == NULL)
-	    break;
-
-	  ret = dwarf_lookup_pc (state, ddata, pc, callback, error_callback,
-				 data, &found);
-	  if (ret != 0 || found)
-	    return ret;
-
-	  pp = &ddata->next;
-	}
-    }
-
-  /* FIXME: See if any libraries have been dlopen'ed.  */
-
-  return callback (data, pc, NULL, 0, NULL);
-}
-
-/* Initialize our data structures from the DWARF debug info for a
-   file.  Return NULL on failure.  */
-
-static struct dwarf_data *
-build_dwarf_data (struct backtrace_state *state,
-		  uintptr_t base_address,
-		  const struct dwarf_sections *dwarf_sections,
-		  int is_bigendian,
-		  struct dwarf_data *altlink,
-		  backtrace_error_callback error_callback,
-		  void *data)
-{
-  struct unit_addrs_vector addrs_vec;
-  struct unit_addrs *addrs;
-  size_t addrs_count;
-  struct unit_vector units_vec;
-  struct unit **units;
-  size_t units_count;
-  struct dwarf_data *fdata;
-
-  if (!build_address_map (state, base_address, dwarf_sections, is_bigendian,
-			  altlink, error_callback, data, &addrs_vec,
-			  &units_vec))
-    return NULL;
-
-  if (!backtrace_vector_release (state, &addrs_vec.vec, error_callback, data))
-    return NULL;
-  if (!backtrace_vector_release (state, &units_vec.vec, error_callback, data))
-    return NULL;
-  addrs = (struct unit_addrs *) addrs_vec.vec.base;
-  units = (struct unit **) units_vec.vec.base;
-  addrs_count = addrs_vec.count;
-  units_count = units_vec.count;
-  backtrace_qsort (addrs, addrs_count, sizeof (struct unit_addrs),
-		   unit_addrs_compare);
-  /* No qsort for units required, already sorted.  */
-
-  fdata = ((struct dwarf_data *)
-	   backtrace_alloc (state, sizeof (struct dwarf_data),
-			    error_callback, data));
-  if (fdata == NULL)
-    return NULL;
-
-  fdata->next = NULL;
-  fdata->altlink = altlink;
-  fdata->base_address = base_address;
-  fdata->addrs = addrs;
-  fdata->addrs_count = addrs_count;
-  fdata->units = units;
-  fdata->units_count = units_count;
-  fdata->dwarf_sections = *dwarf_sections;
-  fdata->is_bigendian = is_bigendian;
-  memset (&fdata->fvec, 0, sizeof fdata->fvec);
-
-  return fdata;
-}
-
-/* Build our data structures from the DWARF sections for a module.
-   Set FILELINE_FN and STATE->FILELINE_DATA.  Return 1 on success, 0
-   on failure.  */
-
-int
-backtrace_dwarf_add (struct backtrace_state *state,
-		     uintptr_t base_address,
-		     const struct dwarf_sections *dwarf_sections,
-		     int is_bigendian,
-		     struct dwarf_data *fileline_altlink,
-		     backtrace_error_callback error_callback,
-		     void *data, fileline *fileline_fn,
-		     struct dwarf_data **fileline_entry)
-{
-  struct dwarf_data *fdata;
-
-  fdata = build_dwarf_data (state, base_address, dwarf_sections, is_bigendian,
-			    fileline_altlink, error_callback, data);
-  if (fdata == NULL)
-    return 0;
-
-  if (fileline_entry != NULL)
-    *fileline_entry = fdata;
-
-  if (!state->threaded)
-    {
-      struct dwarf_data **pp;
-
-      for (pp = (struct dwarf_data **) (void *) &state->fileline_data;
-	   *pp != NULL;
-	   pp = &(*pp)->next)
-	;
-      *pp = fdata;
-    }
-  else
-    {
-      while (1)
-	{
-	  struct dwarf_data **pp;
-
-	  pp = (struct dwarf_data **) (void *) &state->fileline_data;
-
-	  while (1)
-	    {
-	      struct dwarf_data *p;
-
-	      p = backtrace_atomic_load_pointer (pp);
-
-	      if (p == NULL)
-		break;
-
-	      pp = &p->next;
-	    }
-
-	  if (__sync_bool_compare_and_swap (pp, NULL, fdata))
-	    break;
-	}
-    }
-
-  *fileline_fn = dwarf_fileline;
-
-  return 1;
-}
diff --git a/contrib/libs/backtrace/elf.c b/contrib/libs/backtrace/elf.c
deleted file mode 100644
index 77a1a728fd..0000000000
--- a/contrib/libs/backtrace/elf.c
+++ /dev/null
@@ -1,4924 +0,0 @@
-/* elf.c -- Get debug data from an ELF file for backtraces.
-   Copyright (C) 2012-2021 Free Software Foundation, Inc.
-   Written by Ian Lance Taylor, Google.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-    (1) Redistributions of source code must retain the above copyright
-    notice, this list of conditions and the following disclaimer.
-
-    (2) Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in
-    the documentation and/or other materials provided with the
-    distribution.
-
-    (3) The name of the author may not be used to
-    endorse or promote products derived from this software without
-    specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
-IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
-INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
-IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGE.  */
-
-#include "config.h"
-
-#include <errno.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
-
-#ifdef HAVE_DL_ITERATE_PHDR
- #ifdef HAVE_LINK_H
-  #include <link.h>
- #endif
- #ifdef HAVE_SYS_LINK_H
-  #error #include <sys/link.h>
- #endif
-#endif
-
-#include "backtrace.h"
-#include "internal.h"
-
-#ifndef S_ISLNK
- #ifndef S_IFLNK
-  #define S_IFLNK 0120000
- #endif
- #ifndef S_IFMT
-  #define S_IFMT 0170000
- #endif
- #define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
-#endif
-
-#ifndef __GNUC__
-#define __builtin_prefetch(p, r, l)
-#define unlikely(x) (x)
-#else
-#define unlikely(x) __builtin_expect(!!(x), 0)
-#endif
-
-#if !defined(HAVE_DECL_STRNLEN) || !HAVE_DECL_STRNLEN
-
-/* If strnlen is not declared, provide our own version.  */
-
-static size_t
-xstrnlen (const char *s, size_t maxlen)
-{
-  size_t i;
-
-  for (i = 0; i < maxlen; ++i)
-    if (s[i] == '\0')
-      break;
-  return i;
-}
-
-#define strnlen xstrnlen
-
-#endif
-
-#ifndef HAVE_LSTAT
-
-/* Dummy version of lstat for systems that don't have it.  */
-
-static int
-xlstat (const char *path ATTRIBUTE_UNUSED, struct stat *st ATTRIBUTE_UNUSED)
-{
-  return -1;
-}
-
-#define lstat xlstat
-
-#endif
-
-#ifndef HAVE_READLINK
-
-/* Dummy version of readlink for systems that don't have it.  */
-
-static ssize_t
-xreadlink (const char *path ATTRIBUTE_UNUSED, char *buf ATTRIBUTE_UNUSED,
-	   size_t bufsz ATTRIBUTE_UNUSED)
-{
-  return -1;
-}
-
-#define readlink xreadlink
-
-#endif
-
-#ifndef HAVE_DL_ITERATE_PHDR
-
-/* Dummy version of dl_iterate_phdr for systems that don't have it.  */
-
-#define dl_phdr_info x_dl_phdr_info
-#define dl_iterate_phdr x_dl_iterate_phdr
-
-struct dl_phdr_info
-{
-  uintptr_t dlpi_addr;
-  const char *dlpi_name;
-};
-
-static int
-dl_iterate_phdr (int (*callback) (struct dl_phdr_info *,
-				  size_t, void *) ATTRIBUTE_UNUSED,
-		 void *data ATTRIBUTE_UNUSED)
-{
-  return 0;
-}
-
-#endif /* ! defined (HAVE_DL_ITERATE_PHDR) */
-
-/* The configure script must tell us whether we are 32-bit or 64-bit
-   ELF.  We could make this code test and support either possibility,
-   but there is no point.  This code only works for the currently
-   running executable, which means that we know the ELF mode at
-   configure time.  */
-
-#if BACKTRACE_ELF_SIZE != 32 && BACKTRACE_ELF_SIZE != 64
-#error "Unknown BACKTRACE_ELF_SIZE"
-#endif
-
-/* <link.h> might #include <elf.h> which might define our constants
-   with slightly different values.  Undefine them to be safe.  */
-
-#undef EI_NIDENT
-#undef EI_MAG0
-#undef EI_MAG1
-#undef EI_MAG2
-#undef EI_MAG3
-#undef EI_CLASS
-#undef EI_DATA
-#undef EI_VERSION
-#undef ELF_MAG0
-#undef ELF_MAG1
-#undef ELF_MAG2
-#undef ELF_MAG3
-#undef ELFCLASS32
-#undef ELFCLASS64
-#undef ELFDATA2LSB
-#undef ELFDATA2MSB
-#undef EV_CURRENT
-#undef ET_DYN
-#undef EM_PPC64
-#undef EF_PPC64_ABI
-#undef SHN_LORESERVE
-#undef SHN_XINDEX
-#undef SHN_UNDEF
-#undef SHT_PROGBITS
-#undef SHT_SYMTAB
-#undef SHT_STRTAB
-#undef SHT_DYNSYM
-#undef SHF_COMPRESSED
-#undef STT_OBJECT
-#undef STT_FUNC
-#undef NT_GNU_BUILD_ID
-#undef ELFCOMPRESS_ZLIB
-
-/* Basic types.  */
-
-typedef uint16_t b_elf_half;    /* Elf_Half.  */
-typedef uint32_t b_elf_word;    /* Elf_Word.  */
-typedef int32_t  b_elf_sword;   /* Elf_Sword.  */
-
-#if BACKTRACE_ELF_SIZE == 32
-
-typedef uint32_t b_elf_addr;    /* Elf_Addr.  */
-typedef uint32_t b_elf_off;     /* Elf_Off.  */
-
-typedef uint32_t b_elf_wxword;  /* 32-bit Elf_Word, 64-bit ELF_Xword.  */
-
-#else
-
-typedef uint64_t b_elf_addr;    /* Elf_Addr.  */
-typedef uint64_t b_elf_off;     /* Elf_Off.  */
-typedef uint64_t b_elf_xword;   /* Elf_Xword.  */
-typedef int64_t  b_elf_sxword;  /* Elf_Sxword.  */
-
-typedef uint64_t b_elf_wxword;  /* 32-bit Elf_Word, 64-bit ELF_Xword.  */
-
-#endif
-
-/* Data structures and associated constants.  */
-
-#define EI_NIDENT 16
-
-typedef struct {
-  unsigned char	e_ident[EI_NIDENT];	/* ELF "magic number" */
-  b_elf_half	e_type;			/* Identifies object file type */
-  b_elf_half	e_machine;		/* Specifies required architecture */
-  b_elf_word	e_version;		/* Identifies object file version */
-  b_elf_addr	e_entry;		/* Entry point virtual address */
-  b_elf_off	e_phoff;		/* Program header table file offset */
-  b_elf_off	e_shoff;		/* Section header table file offset */
-  b_elf_word	e_flags;		/* Processor-specific flags */
-  b_elf_half	e_ehsize;		/* ELF header size in bytes */
-  b_elf_half	e_phentsize;		/* Program header table entry size */
-  b_elf_half	e_phnum;		/* Program header table entry count */
-  b_elf_half	e_shentsize;		/* Section header table entry size */
-  b_elf_half	e_shnum;		/* Section header table entry count */
-  b_elf_half	e_shstrndx;		/* Section header string table index */
-} b_elf_ehdr;  /* Elf_Ehdr.  */
-
-#define EI_MAG0 0
-#define EI_MAG1 1
-#define EI_MAG2 2
-#define EI_MAG3 3
-#define EI_CLASS 4
-#define EI_DATA 5
-#define EI_VERSION 6
-
-#define ELFMAG0 0x7f
-#define ELFMAG1 'E'
-#define ELFMAG2 'L'
-#define ELFMAG3 'F'
-
-#define ELFCLASS32 1
-#define ELFCLASS64 2
-
-#define ELFDATA2LSB 1
-#define ELFDATA2MSB 2
-
-#define EV_CURRENT 1
-
-#define ET_DYN 3
-
-#define EM_PPC64 21
-#define EF_PPC64_ABI 3
-
-typedef struct {
-  b_elf_word	sh_name;		/* Section name, index in string tbl */
-  b_elf_word	sh_type;		/* Type of section */
-  b_elf_wxword	sh_flags;		/* Miscellaneous section attributes */
-  b_elf_addr	sh_addr;		/* Section virtual addr at execution */
-  b_elf_off	sh_offset;		/* Section file offset */
-  b_elf_wxword	sh_size;		/* Size of section in bytes */
-  b_elf_word	sh_link;		/* Index of another section */
-  b_elf_word	sh_info;		/* Additional section information */
-  b_elf_wxword	sh_addralign;		/* Section alignment */
-  b_elf_wxword	sh_entsize;		/* Entry size if section holds table */
-} b_elf_shdr;  /* Elf_Shdr.  */
-
-#define SHN_UNDEF	0x0000		/* Undefined section */
-#define SHN_LORESERVE	0xFF00		/* Begin range of reserved indices */
-#define SHN_XINDEX	0xFFFF		/* Section index is held elsewhere */
-
-#define SHT_PROGBITS 1
-#define SHT_SYMTAB 2
-#define SHT_STRTAB 3
-#define SHT_DYNSYM 11
-
-#define SHF_COMPRESSED 0x800
-
-#if BACKTRACE_ELF_SIZE == 32
-
-typedef struct
-{
-  b_elf_word	st_name;		/* Symbol name, index in string tbl */
-  b_elf_addr	st_value;		/* Symbol value */
-  b_elf_word	st_size;		/* Symbol size */
-  unsigned char	st_info;		/* Symbol binding and type */
-  unsigned char	st_other;		/* Visibility and other data */
-  b_elf_half	st_shndx;		/* Symbol section index */
-} b_elf_sym;  /* Elf_Sym.  */
-
-#else /* BACKTRACE_ELF_SIZE != 32 */
-
-typedef struct
-{
-  b_elf_word	st_name;		/* Symbol name, index in string tbl */
-  unsigned char	st_info;		/* Symbol binding and type */
-  unsigned char	st_other;		/* Visibility and other data */
-  b_elf_half	st_shndx;		/* Symbol section index */
-  b_elf_addr	st_value;		/* Symbol value */
-  b_elf_xword	st_size;		/* Symbol size */
-} b_elf_sym;  /* Elf_Sym.  */
-
-#endif /* BACKTRACE_ELF_SIZE != 32 */
-
-#define STT_OBJECT 1
-#define STT_FUNC 2
-
-typedef struct
-{
-  uint32_t namesz;
-  uint32_t descsz;
-  uint32_t type;
-  char name[1];
-} b_elf_note;
-
-#define NT_GNU_BUILD_ID 3
-
-#if BACKTRACE_ELF_SIZE == 32
-
-typedef struct
-{
-  b_elf_word	ch_type;		/* Compresstion algorithm */
-  b_elf_word	ch_size;		/* Uncompressed size */
-  b_elf_word	ch_addralign;		/* Alignment for uncompressed data */
-} b_elf_chdr;  /* Elf_Chdr */
-
-#else /* BACKTRACE_ELF_SIZE != 32 */
-
-typedef struct
-{
-  b_elf_word	ch_type;		/* Compression algorithm */
-  b_elf_word	ch_reserved;		/* Reserved */
-  b_elf_xword	ch_size;		/* Uncompressed size */
-  b_elf_xword	ch_addralign;		/* Alignment for uncompressed data */
-} b_elf_chdr;  /* Elf_Chdr */
-
-#endif /* BACKTRACE_ELF_SIZE != 32 */
-
-#define ELFCOMPRESS_ZLIB 1
-
-/* Names of sections, indexed by enum dwarf_section in internal.h.  */
-
-static const char * const dwarf_section_names[DEBUG_MAX] =
-{
-  ".debug_info",
-  ".debug_line",
-  ".debug_abbrev",
-  ".debug_ranges",
-  ".debug_str",
-  ".debug_addr",
-  ".debug_str_offsets",
-  ".debug_line_str",
-  ".debug_rnglists"
-};
-
-/* Information we gather for the sections we care about.  */
-
-struct debug_section_info
-{
-  /* Section file offset.  */
-  off_t offset;
-  /* Section size.  */
-  size_t size;
-  /* Section contents, after read from file.  */
-  const unsigned char *data;
-  /* Whether the SHF_COMPRESSED flag is set for the section.  */
-  int compressed;
-};
-
-/* Information we keep for an ELF symbol.  */
-
-struct elf_symbol
-{
-  /* The name of the symbol.  */
-  const char *name;
-  /* The address of the symbol.  */
-  uintptr_t address;
-  /* The size of the symbol.  */
-  size_t size;
-};
-
-/* Information to pass to elf_syminfo.  */
-
-struct elf_syminfo_data
-{
-  /* Symbols for the next module.  */
-  struct elf_syminfo_data *next;
-  /* The ELF symbols, sorted by address.  */
-  struct elf_symbol *symbols;
-  /* The number of symbols.  */
-  size_t count;
-};
-
-/* A view that works for either a file or memory.  */
-
-struct elf_view
-{
-  struct backtrace_view view;
-  int release; /* If non-zero, must call backtrace_release_view.  */
-};
-
-/* Information about PowerPC64 ELFv1 .opd section.  */
-
-struct elf_ppc64_opd_data
-{
-  /* Address of the .opd section.  */
-  b_elf_addr addr;
-  /* Section data.  */
-  const char *data;
-  /* Size of the .opd section.  */
-  size_t size;
-  /* Corresponding section view.  */
-  struct elf_view view;
-};
-
-/* Create a view of SIZE bytes from DESCRIPTOR/MEMORY at OFFSET.  */
-
-static int
-elf_get_view (struct backtrace_state *state, int descriptor,
-	      const unsigned char *memory, size_t memory_size, off_t offset,
-	      uint64_t size, backtrace_error_callback error_callback,
-	      void *data, struct elf_view *view)
-{
-  if (memory == NULL)
-    {
-      view->release = 1;
-      return backtrace_get_view (state, descriptor, offset, size,
-				 error_callback, data, &view->view);
-    }
-  else
-    {
-      if ((uint64_t) offset + size > (uint64_t) memory_size)
-	{
-	  error_callback (data, "out of range for in-memory file", 0);
-	  return 0;
-	}
-      view->view.data = (const void *) (memory + offset);
-      view->view.base = NULL;
-      view->view.len = size;
-      view->release = 0;
-      return 1;
-    }
-}
-
-/* Release a view read by elf_get_view.  */
-
-static void
-elf_release_view (struct backtrace_state *state, struct elf_view *view,
-		  backtrace_error_callback error_callback, void *data)
-{
-  if (view->release)
-    backtrace_release_view (state, &view->view, error_callback, data);
-}
-
-/* Compute the CRC-32 of BUF/LEN.  This uses the CRC used for
-   .gnu_debuglink files.  */
-
-static uint32_t
-elf_crc32 (uint32_t crc, const unsigned char *buf, size_t len)
-{
-  static const uint32_t crc32_table[256] =
-    {
-      0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419,
-      0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,
-      0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07,
-      0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
-      0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856,
-      0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
-      0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4,
-      0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
-      0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3,
-      0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,
-      0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599,
-      0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
-      0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190,
-      0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,
-      0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e,
-      0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
-      0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed,
-      0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
-      0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3,
-      0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
-      0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a,
-      0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,
-      0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010,
-      0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
-      0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17,
-      0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
-      0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615,
-      0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
-      0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344,
-      0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
-      0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a,
-      0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
-      0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1,
-      0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,
-      0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef,
-      0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
-      0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe,
-      0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,
-      0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c,
-      0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
-      0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b,
-      0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
-      0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1,
-      0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
-      0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278,
-      0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,
-      0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66,
-      0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
-      0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605,
-      0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,
-      0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b,
-      0x2d02ef8d
-    };
-  const unsigned char *end;
-
-  crc = ~crc;
-  for (end = buf + len; buf < end; ++ buf)
-    crc = crc32_table[(crc ^ *buf) & 0xff] ^ (crc >> 8);
-  return ~crc;
-}
-
-/* Return the CRC-32 of the entire file open at DESCRIPTOR.  */
-
-static uint32_t
-elf_crc32_file (struct backtrace_state *state, int descriptor,
-		backtrace_error_callback error_callback, void *data)
-{
-  struct stat st;
-  struct backtrace_view file_view;
-  uint32_t ret;
-
-  if (fstat (descriptor, &st) < 0)
-    {
-      error_callback (data, "fstat", errno);
-      return 0;
-    }
-
-  if (!backtrace_get_view (state, descriptor, 0, st.st_size, error_callback,
-			   data, &file_view))
-    return 0;
-
-  ret = elf_crc32 (0, (const unsigned char *) file_view.data, st.st_size);
-
-  backtrace_release_view (state, &file_view, error_callback, data);
-
-  return ret;
-}
-
-/* A dummy callback function used when we can't find a symbol
-   table.  */
-
-static void
-elf_nosyms (struct backtrace_state *state ATTRIBUTE_UNUSED,
-	    uintptr_t addr ATTRIBUTE_UNUSED,
-	    backtrace_syminfo_callback callback ATTRIBUTE_UNUSED,
-	    backtrace_error_callback error_callback, void *data)
-{
-  error_callback (data, "no symbol table in ELF executable", -1);
-}
-
-/* A callback function used when we can't find any debug info.  */
-
-static int
-elf_nodebug (struct backtrace_state *state, uintptr_t pc,
-	     backtrace_full_callback callback,
-	     backtrace_error_callback error_callback, void *data)
-{
-  if (state->syminfo_fn != NULL && state->syminfo_fn != elf_nosyms)
-    {
-      struct backtrace_call_full bdata;
-
-      /* Fetch symbol information so that we can least get the
-	 function name.  */
-
-      bdata.full_callback = callback;
-      bdata.full_error_callback = error_callback;
-      bdata.full_data = data;
-      bdata.ret = 0;
-      state->syminfo_fn (state, pc, backtrace_syminfo_to_full_callback,
-			 backtrace_syminfo_to_full_error_callback, &bdata);
-      return bdata.ret;
-    }
-
-  error_callback (data, "no debug info in ELF executable", -1);
-  return 0;
-}
-
-/* Compare struct elf_symbol for qsort.  */
-
-static int
-elf_symbol_compare (const void *v1, const void *v2)
-{
-  const struct elf_symbol *e1 = (const struct elf_symbol *) v1;
-  const struct elf_symbol *e2 = (const struct elf_symbol *) v2;
-
-  if (e1->address < e2->address)
-    return -1;
-  else if (e1->address > e2->address)
-    return 1;
-  else
-    return 0;
-}
-
-/* Compare an ADDR against an elf_symbol for bsearch.  We allocate one
-   extra entry in the array so that this can look safely at the next
-   entry.  */
-
-static int
-elf_symbol_search (const void *vkey, const void *ventry)
-{
-  const uintptr_t *key = (const uintptr_t *) vkey;
-  const struct elf_symbol *entry = (const struct elf_symbol *) ventry;
-  uintptr_t addr;
-
-  addr = *key;
-  if (addr < entry->address)
-    return -1;
-  else if (addr >= entry->address + entry->size)
-    return 1;
-  else
-    return 0;
-}
-
-/* Initialize the symbol table info for elf_syminfo.  */
-
-static int
-elf_initialize_syminfo (struct backtrace_state *state,
-			uintptr_t base_address,
-			const unsigned char *symtab_data, size_t symtab_size,
-			const unsigned char *strtab, size_t strtab_size,
-			backtrace_error_callback error_callback,
-			void *data, struct elf_syminfo_data *sdata,
-			struct elf_ppc64_opd_data *opd)
-{
-  size_t sym_count;
-  const b_elf_sym *sym;
-  size_t elf_symbol_count;
-  size_t elf_symbol_size;
-  struct elf_symbol *elf_symbols;
-  size_t i;
-  unsigned int j;
-
-  sym_count = symtab_size / sizeof (b_elf_sym);
-
-  /* We only care about function symbols.  Count them.  */
-  sym = (const b_elf_sym *) symtab_data;
-  elf_symbol_count = 0;
-  for (i = 0; i < sym_count; ++i, ++sym)
-    {
-      int info;
-
-      info = sym->st_info & 0xf;
-      if ((info == STT_FUNC || info == STT_OBJECT)
-	  && sym->st_shndx != SHN_UNDEF)
-	++elf_symbol_count;
-    }
-
-  elf_symbol_size = elf_symbol_count * sizeof (struct elf_symbol);
-  elf_symbols = ((struct elf_symbol *)
-		 backtrace_alloc (state, elf_symbol_size, error_callback,
-				  data));
-  if (elf_symbols == NULL)
-    return 0;
-
-  sym = (const b_elf_sym *) symtab_data;
-  j = 0;
-  for (i = 0; i < sym_count; ++i, ++sym)
-    {
-      int info;
-
-      info = sym->st_info & 0xf;
-      if (info != STT_FUNC && info != STT_OBJECT)
-	continue;
-      if (sym->st_shndx == SHN_UNDEF)
-	continue;
-      if (sym->st_name >= strtab_size)
-	{
-	  error_callback (data, "symbol string index out of range", 0);
-	  backtrace_free (state, elf_symbols, elf_symbol_size, error_callback,
-			  data);
-	  return 0;
-	}
-      elf_symbols[j].name = (const char *) strtab + sym->st_name;
-      /* Special case PowerPC64 ELFv1 symbols in .opd section, if the symbol
-	 is a function descriptor, read the actual code address from the
-	 descriptor.  */
-      if (opd
-	  && sym->st_value >= opd->addr
-	  && sym->st_value < opd->addr + opd->size)
-	elf_symbols[j].address
-	  = *(const b_elf_addr *) (opd->data + (sym->st_value - opd->addr));
-      else
-	elf_symbols[j].address = sym->st_value;
-      elf_symbols[j].address += base_address;
-      elf_symbols[j].size = sym->st_size;
-      ++j;
-    }
-
-  backtrace_qsort (elf_symbols, elf_symbol_count, sizeof (struct elf_symbol),
-		   elf_symbol_compare);
-
-  sdata->next = NULL;
-  sdata->symbols = elf_symbols;
-  sdata->count = elf_symbol_count;
-
-  return 1;
-}
-
-/* Add EDATA to the list in STATE.  */
-
-static void
-elf_add_syminfo_data (struct backtrace_state *state,
-		      struct elf_syminfo_data *edata)
-{
-  if (!state->threaded)
-    {
-      struct elf_syminfo_data **pp;
-
-      for (pp = (struct elf_syminfo_data **) (void *) &state->syminfo_data;
-	   *pp != NULL;
-	   pp = &(*pp)->next)
-	;
-      *pp = edata;
-    }
-  else
-    {
-      while (1)
-	{
-	  struct elf_syminfo_data **pp;
-
-	  pp = (struct elf_syminfo_data **) (void *) &state->syminfo_data;
-
-	  while (1)
-	    {
-	      struct elf_syminfo_data *p;
-
-	      p = backtrace_atomic_load_pointer (pp);
-
-	      if (p == NULL)
-		break;
-
-	      pp = &p->next;
-	    }
-
-	  if (__sync_bool_compare_and_swap (pp, NULL, edata))
-	    break;
-	}
-    }
-}
-
-/* Return the symbol name and value for an ADDR.  */
-
-static void
-elf_syminfo (struct backtrace_state *state, uintptr_t addr,
-	     backtrace_syminfo_callback callback,
-	     backtrace_error_callback error_callback ATTRIBUTE_UNUSED,
-	     void *data)
-{
-  struct elf_syminfo_data *edata;
-  struct elf_symbol *sym = NULL;
-
-  if (!state->threaded)
-    {
-      for (edata = (struct elf_syminfo_data *) state->syminfo_data;
-	   edata != NULL;
-	   edata = edata->next)
-	{
-	  sym = ((struct elf_symbol *)
-		 bsearch (&addr, edata->symbols, edata->count,
-			  sizeof (struct elf_symbol), elf_symbol_search));
-	  if (sym != NULL)
-	    break;
-	}
-    }
-  else
-    {
-      struct elf_syminfo_data **pp;
-
-      pp = (struct elf_syminfo_data **) (void *) &state->syminfo_data;
-      while (1)
-	{
-	  edata = backtrace_atomic_load_pointer (pp);
-	  if (edata == NULL)
-	    break;
-
-	  sym = ((struct elf_symbol *)
-		 bsearch (&addr, edata->symbols, edata->count,
-			  sizeof (struct elf_symbol), elf_symbol_search));
-	  if (sym != NULL)
-	    break;
-
-	  pp = &edata->next;
-	}
-    }
-
-  if (sym == NULL)
-    callback (data, addr, NULL, 0, 0);
-  else
-    callback (data, addr, sym->name, sym->address, sym->size);
-}
-
-/* Return whether FILENAME is a symlink.  */
-
-static int
-elf_is_symlink (const char *filename)
-{
-  struct stat st;
-
-  if (lstat (filename, &st) < 0)
-    return 0;
-  return S_ISLNK (st.st_mode);
-}
-
-/* Return the results of reading the symlink FILENAME in a buffer
-   allocated by backtrace_alloc.  Return the length of the buffer in
-   *LEN.  */
-
-static char *
-elf_readlink (struct backtrace_state *state, const char *filename,
-	      backtrace_error_callback error_callback, void *data,
-	      size_t *plen)
-{
-  size_t len;
-  char *buf;
-
-  len = 128;
-  while (1)
-    {
-      ssize_t rl;
-
-      buf = backtrace_alloc (state, len, error_callback, data);
-      if (buf == NULL)
-	return NULL;
-      rl = readlink (filename, buf, len);
-      if (rl < 0)
-	{
-	  backtrace_free (state, buf, len, error_callback, data);
-	  return NULL;
-	}
-      if ((size_t) rl < len - 1)
-	{
-	  buf[rl] = '\0';
-	  *plen = len;
-	  return buf;
-	}
-      backtrace_free (state, buf, len, error_callback, data);
-      len *= 2;
-    }
-}
-
-#define SYSTEM_BUILD_ID_DIR "/usr/lib/debug/.build-id/"
-
-/* Open a separate debug info file, using the build ID to find it.
-   Returns an open file descriptor, or -1.
-
-   The GDB manual says that the only place gdb looks for a debug file
-   when the build ID is known is in /usr/lib/debug/.build-id.  */
-
-static int
-elf_open_debugfile_by_buildid (struct backtrace_state *state,
-			       const char *buildid_data, size_t buildid_size,
-			       backtrace_error_callback error_callback,
-			       void *data)
-{
-  const char * const prefix = SYSTEM_BUILD_ID_DIR;
-  const size_t prefix_len = strlen (prefix);
-  const char * const suffix = ".debug";
-  const size_t suffix_len = strlen (suffix);
-  size_t len;
-  char *bd_filename;
-  char *t;
-  size_t i;
-  int ret;
-  int does_not_exist;
-
-  len = prefix_len + buildid_size * 2 + suffix_len + 2;
-  bd_filename = backtrace_alloc (state, len, error_callback, data);
-  if (bd_filename == NULL)
-    return -1;
-
-  t = bd_filename;
-  memcpy (t, prefix, prefix_len);
-  t += prefix_len;
-  for (i = 0; i < buildid_size; i++)
-    {
-      unsigned char b;
-      unsigned char nib;
-
-      b = (unsigned char) buildid_data[i];
-      nib = (b & 0xf0) >> 4;
-      *t++ = nib < 10 ? '0' + nib : 'a' + nib - 10;
-      nib = b & 0x0f;
-      *t++ = nib < 10 ? '0' + nib : 'a' + nib - 10;
-      if (i == 0)
-	*t++ = '/';
-    }
-  memcpy (t, suffix, suffix_len);
-  t[suffix_len] = '\0';
-
-  ret = backtrace_open (bd_filename, error_callback, data, &does_not_exist);
-
-  backtrace_free (state, bd_filename, len, error_callback, data);
-
-  /* gdb checks that the debuginfo file has the same build ID note.
-     That seems kind of pointless to me--why would it have the right
-     name but not the right build ID?--so skipping the check.  */
-
-  return ret;
-}
-
-/* Try to open a file whose name is PREFIX (length PREFIX_LEN)
-   concatenated with PREFIX2 (length PREFIX2_LEN) concatenated with
-   DEBUGLINK_NAME.  Returns an open file descriptor, or -1.  */
-
-static int
-elf_try_debugfile (struct backtrace_state *state, const char *prefix,
-		   size_t prefix_len, const char *prefix2, size_t prefix2_len,
-		   const char *debuglink_name,
-		   backtrace_error_callback error_callback, void *data)
-{
-  size_t debuglink_len;
-  size_t try_len;
-  char *try;
-  int does_not_exist;
-  int ret;
-
-  debuglink_len = strlen (debuglink_name);
-  try_len = prefix_len + prefix2_len + debuglink_len + 1;
-  try = backtrace_alloc (state, try_len, error_callback, data);
-  if (try == NULL)
-    return -1;
-
-  memcpy (try, prefix, prefix_len);
-  memcpy (try + prefix_len, prefix2, prefix2_len);
-  memcpy (try + prefix_len + prefix2_len, debuglink_name, debuglink_len);
-  try[prefix_len + prefix2_len + debuglink_len] = '\0';
-
-  ret = backtrace_open (try, error_callback, data, &does_not_exist);
-
-  backtrace_free (state, try, try_len, error_callback, data);
-
-  return ret;
-}
-
-/* Find a separate debug info file, using the debuglink section data
-   to find it.  Returns an open file descriptor, or -1.  */
-
-static int
-elf_find_debugfile_by_debuglink (struct backtrace_state *state,
-				 const char *filename,
-				 const char *debuglink_name,
-				 backtrace_error_callback error_callback,
-				 void *data)
-{
-  int ret;
-  char *alc;
-  size_t alc_len;
-  const char *slash;
-  int ddescriptor;
-  const char *prefix;
-  size_t prefix_len;
-
-  /* Resolve symlinks in FILENAME.  Since FILENAME is fairly likely to
-     be /proc/self/exe, symlinks are common.  We don't try to resolve
-     the whole path name, just the base name.  */
-  ret = -1;
-  alc = NULL;
-  alc_len = 0;
-  while (elf_is_symlink (filename))
-    {
-      char *new_buf;
-      size_t new_len;
-
-      new_buf = elf_readlink (state, filename, error_callback, data, &new_len);
-      if (new_buf == NULL)
-	break;
-
-      if (new_buf[0] == '/')
-	filename = new_buf;
-      else
-	{
-	  slash = strrchr (filename, '/');
-	  if (slash == NULL)
-	    filename = new_buf;
-	  else
-	    {
-	      size_t clen;
-	      char *c;
-
-	      slash++;
-	      clen = slash - filename + strlen (new_buf) + 1;
-	      c = backtrace_alloc (state, clen, error_callback, data);
-	      if (c == NULL)
-		goto done;
-
-	      memcpy (c, filename, slash - filename);
-	      memcpy (c + (slash - filename), new_buf, strlen (new_buf));
-	      c[slash - filename + strlen (new_buf)] = '\0';
-	      backtrace_free (state, new_buf, new_len, error_callback, data);
-	      filename = c;
-	      new_buf = c;
-	      new_len = clen;
-	    }
-	}
-
-      if (alc != NULL)
-	backtrace_free (state, alc, alc_len, error_callback, data);
-      alc = new_buf;
-      alc_len = new_len;
-    }
-
-  /* Look for DEBUGLINK_NAME in the same directory as FILENAME.  */
-
-  slash = strrchr (filename, '/');
-  if (slash == NULL)
-    {
-      prefix = "";
-      prefix_len = 0;
-    }
-  else
-    {
-      slash++;
-      prefix = filename;
-      prefix_len = slash - filename;
-    }
-
-  ddescriptor = elf_try_debugfile (state, prefix, prefix_len, "", 0,
-				   debuglink_name, error_callback, data);
-  if (ddescriptor >= 0)
-    {
-      ret = ddescriptor;
-      goto done;
-    }
-
-  /* Look for DEBUGLINK_NAME in a .debug subdirectory of FILENAME.  */
-
-  ddescriptor = elf_try_debugfile (state, prefix, prefix_len, ".debug/",
-				   strlen (".debug/"), debuglink_name,
-				   error_callback, data);
-  if (ddescriptor >= 0)
-    {
-      ret = ddescriptor;
-      goto done;
-    }
-
-  /* Look for DEBUGLINK_NAME in /usr/lib/debug.  */
-
-  ddescriptor = elf_try_debugfile (state, "/usr/lib/debug/",
-				   strlen ("/usr/lib/debug/"), prefix,
-				   prefix_len, debuglink_name,
-				   error_callback, data);
-  if (ddescriptor >= 0)
-    ret = ddescriptor;
-
- done:
-  if (alc != NULL && alc_len > 0)
-    backtrace_free (state, alc, alc_len, error_callback, data);
-  return ret;
-}
-
-/* Open a separate debug info file, using the debuglink section data
-   to find it.  Returns an open file descriptor, or -1.  */
-
-static int
-elf_open_debugfile_by_debuglink (struct backtrace_state *state,
-				 const char *filename,
-				 const char *debuglink_name,
-				 uint32_t debuglink_crc,
-				 backtrace_error_callback error_callback,
-				 void *data)
-{
-  int ddescriptor;
-
-  ddescriptor = elf_find_debugfile_by_debuglink (state, filename,
-						 debuglink_name,
-						 error_callback, data);
-  if (ddescriptor < 0)
-    return -1;
-
-  if (debuglink_crc != 0)
-    {
-      uint32_t got_crc;
-
-      got_crc = elf_crc32_file (state, ddescriptor, error_callback, data);
-      if (got_crc != debuglink_crc)
-	{
-	  backtrace_close (ddescriptor, error_callback, data);
-	  return -1;
-	}
-    }
-
-  return ddescriptor;
-}
-
-/* A function useful for setting a breakpoint for an inflation failure
-   when this code is compiled with -g.  */
-
-static void
-elf_uncompress_failed(void)
-{
-}
-
-/* *PVAL is the current value being read from the stream, and *PBITS
-   is the number of valid bits.  Ensure that *PVAL holds at least 15
-   bits by reading additional bits from *PPIN, up to PINEND, as
-   needed.  Updates *PPIN, *PVAL and *PBITS.  Returns 1 on success, 0
-   on error.  */
-
-static int
-elf_zlib_fetch (const unsigned char **ppin, const unsigned char *pinend,
-		uint64_t *pval, unsigned int *pbits)
-{
-  unsigned int bits;
-  const unsigned char *pin;
-  uint64_t val;
-  uint32_t next;
-
-  bits = *pbits;
-  if (bits >= 15)
-    return 1;
-  pin = *ppin;
-  val = *pval;
-
-  if (unlikely (pinend - pin < 4))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-
-#if defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) \
-    && defined(__ORDER_BIG_ENDIAN__) \
-    && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ \
-        || __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
-  /* We've ensured that PIN is aligned.  */
-  next = *(const uint32_t *)pin;
-
-#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
-  next = __builtin_bswap32 (next);
-#endif
-#else
-  next = pin[0] | (pin[1] << 8) | (pin[2] << 16) | (pin[3] << 24);
-#endif
-
-  val |= (uint64_t)next << bits;
-  bits += 32;
-  pin += 4;
-
-  /* We will need the next four bytes soon.  */
-  __builtin_prefetch (pin, 0, 0);
-
-  *ppin = pin;
-  *pval = val;
-  *pbits = bits;
-  return 1;
-}
-
-/* Huffman code tables, like the rest of the zlib format, are defined
-   by RFC 1951.  We store a Huffman code table as a series of tables
-   stored sequentially in memory.  Each entry in a table is 16 bits.
-   The first, main, table has 256 entries.  It is followed by a set of
-   secondary tables of length 2 to 128 entries.  The maximum length of
-   a code sequence in the deflate format is 15 bits, so that is all we
-   need.  Each secondary table has an index, which is the offset of
-   the table in the overall memory storage.
-
-   The deflate format says that all codes of a given bit length are
-   lexicographically consecutive.  Perhaps we could have 130 values
-   that require a 15-bit code, perhaps requiring three secondary
-   tables of size 128.  I don't know if this is actually possible, but
-   it suggests that the maximum size required for secondary tables is
-   3 * 128 + 3 * 64 ... == 768.  The zlib enough program reports 660
-   as the maximum.  We permit 768, since in addition to the 256 for
-   the primary table, with two bytes per entry, and with the two
-   tables we need, that gives us a page.
-
-   A single table entry needs to store a value or (for the main table
-   only) the index and size of a secondary table.  Values range from 0
-   to 285, inclusive.  Secondary table indexes, per above, range from
-   0 to 510.  For a value we need to store the number of bits we need
-   to determine that value (one value may appear multiple times in the
-   table), which is 1 to 8.  For a secondary table we need to store
-   the number of bits used to index into the table, which is 1 to 7.
-   And of course we need 1 bit to decide whether we have a value or a
-   secondary table index.  So each entry needs 9 bits for value/table
-   index, 3 bits for size, 1 bit what it is.  For simplicity we use 16
-   bits per entry.  */
-
-/* Number of entries we allocate to for one code table.  We get a page
-   for the two code tables we need.  */
-
-#define HUFFMAN_TABLE_SIZE (1024)
-
-/* Bit masks and shifts for the values in the table.  */
-
-#define HUFFMAN_VALUE_MASK 0x01ff
-#define HUFFMAN_BITS_SHIFT 9
-#define HUFFMAN_BITS_MASK 0x7
-#define HUFFMAN_SECONDARY_SHIFT 12
-
-/* For working memory while inflating we need two code tables, we need
-   an array of code lengths (max value 15, so we use unsigned char),
-   and an array of unsigned shorts used while building a table.  The
-   latter two arrays must be large enough to hold the maximum number
-   of code lengths, which RFC 1951 defines as 286 + 30.  */
-
-#define ZDEBUG_TABLE_SIZE \
-  (2 * HUFFMAN_TABLE_SIZE * sizeof (uint16_t) \
-   + (286 + 30) * sizeof (uint16_t)	      \
-   + (286 + 30) * sizeof (unsigned char))
-
-#define ZDEBUG_TABLE_CODELEN_OFFSET \
-  (2 * HUFFMAN_TABLE_SIZE * sizeof (uint16_t) \
-   + (286 + 30) * sizeof (uint16_t))
-
-#define ZDEBUG_TABLE_WORK_OFFSET \
-  (2 * HUFFMAN_TABLE_SIZE * sizeof (uint16_t))
-
-#ifdef BACKTRACE_GENERATE_FIXED_HUFFMAN_TABLE
-
-/* Used by the main function that generates the fixed table to learn
-   the table size.  */
-static size_t final_next_secondary;
-
-#endif
-
-/* Build a Huffman code table from an array of lengths in CODES of
-   length CODES_LEN.  The table is stored into *TABLE.  ZDEBUG_TABLE
-   is the same as for elf_zlib_inflate, used to find some work space.
-   Returns 1 on success, 0 on error.  */
-
-static int
-elf_zlib_inflate_table (unsigned char *codes, size_t codes_len,
-			uint16_t *zdebug_table, uint16_t *table)
-{
-  uint16_t count[16];
-  uint16_t start[16];
-  uint16_t prev[16];
-  uint16_t firstcode[7];
-  uint16_t *next;
-  size_t i;
-  size_t j;
-  unsigned int code;
-  size_t next_secondary;
-
-  /* Count the number of code of each length.  Set NEXT[val] to be the
-     next value after VAL with the same bit length.  */
-
-  next = (uint16_t *) (((unsigned char *) zdebug_table)
-		       + ZDEBUG_TABLE_WORK_OFFSET);
-
-  memset (&count[0], 0, 16 * sizeof (uint16_t));
-  for (i = 0; i < codes_len; ++i)
-    {
-      if (unlikely (codes[i] >= 16))
-	{
-	  elf_uncompress_failed ();
-	  return 0;
-	}
-
-      if (count[codes[i]] == 0)
-	{
-	  start[codes[i]] = i;
-	  prev[codes[i]] = i;
-	}
-      else
-	{
-	  next[prev[codes[i]]] = i;
-	  prev[codes[i]] = i;
-	}
-
-      ++count[codes[i]];
-    }
-
-  /* For each length, fill in the table for the codes of that
-     length.  */
-
-  memset (table, 0, HUFFMAN_TABLE_SIZE * sizeof (uint16_t));
-
-  /* Handle the values that do not require a secondary table.  */
-
-  code = 0;
-  for (j = 1; j <= 8; ++j)
-    {
-      unsigned int jcnt;
-      unsigned int val;
-
-      jcnt = count[j];
-      if (jcnt == 0)
-	continue;
-
-      if (unlikely (jcnt > (1U << j)))
-	{
-	  elf_uncompress_failed ();
-	  return 0;
-	}
-
-      /* There are JCNT values that have this length, the values
-	 starting from START[j] continuing through NEXT[VAL].  Those
-	 values are assigned consecutive values starting at CODE.  */
-
-      val = start[j];
-      for (i = 0; i < jcnt; ++i)
-	{
-	  uint16_t tval;
-	  size_t ind;
-	  unsigned int incr;
-
-	  /* In the compressed bit stream, the value VAL is encoded as
-	     J bits with the value C.  */
-
-	  if (unlikely ((val & ~HUFFMAN_VALUE_MASK) != 0))
-	    {
-	      elf_uncompress_failed ();
-	      return 0;
-	    }
-
-	  tval = val | ((j - 1) << HUFFMAN_BITS_SHIFT);
-
-	  /* The table lookup uses 8 bits.  If J is less than 8, we
-	     don't know what the other bits will be.  We need to fill
-	     in all possibilities in the table.  Since the Huffman
-	     code is unambiguous, those entries can't be used for any
-	     other code.  */
-
-	  for (ind = code; ind < 0x100; ind += 1 << j)
-	    {
-	      if (unlikely (table[ind] != 0))
-		{
-		  elf_uncompress_failed ();
-		  return 0;
-		}
-	      table[ind] = tval;
-	    }
-
-	  /* Advance to the next value with this length.  */
-	  if (i + 1 < jcnt)
-	    val = next[val];
-
-	  /* The Huffman codes are stored in the bitstream with the
-	     most significant bit first, as is required to make them
-	     unambiguous.  The effect is that when we read them from
-	     the bitstream we see the bit sequence in reverse order:
-	     the most significant bit of the Huffman code is the least
-	     significant bit of the value we read from the bitstream.
-	     That means that to make our table lookups work, we need
-	     to reverse the bits of CODE.  Since reversing bits is
-	     tedious and in general requires using a table, we instead
-	     increment CODE in reverse order.  That is, if the number
-	     of bits we are currently using, here named J, is 3, we
-	     count as 000, 100, 010, 110, 001, 101, 011, 111, which is
-	     to say the numbers from 0 to 7 but with the bits
-	     reversed.  Going to more bits, aka incrementing J,
-	     effectively just adds more zero bits as the beginning,
-	     and as such does not change the numeric value of CODE.
-
-	     To increment CODE of length J in reverse order, find the
-	     most significant zero bit and set it to one while
-	     clearing all higher bits.  In other words, add 1 modulo
-	     2^J, only reversed.  */
-
-	  incr = 1U << (j - 1);
-	  while ((code & incr) != 0)
-	    incr >>= 1;
-	  if (incr == 0)
-	    code = 0;
-	  else
-	    {
-	      code &= incr - 1;
-	      code += incr;
-	    }
-	}
-    }
-
-  /* Handle the values that require a secondary table.  */
-
-  /* Set FIRSTCODE, the number at which the codes start, for each
-     length.  */
-
-  for (j = 9; j < 16; j++)
-    {
-      unsigned int jcnt;
-      unsigned int k;
-
-      jcnt = count[j];
-      if (jcnt == 0)
-	continue;
-
-      /* There are JCNT values that have this length, the values
-	 starting from START[j].  Those values are assigned
-	 consecutive values starting at CODE.  */
-
-      firstcode[j - 9] = code;
-
-      /* Reverse add JCNT to CODE modulo 2^J.  */
-      for (k = 0; k < j; ++k)
-	{
-	  if ((jcnt & (1U << k)) != 0)
-	    {
-	      unsigned int m;
-	      unsigned int bit;
-
-	      bit = 1U << (j - k - 1);
-	      for (m = 0; m < j - k; ++m, bit >>= 1)
-		{
-		  if ((code & bit) == 0)
-		    {
-		      code += bit;
-		      break;
-		    }
-		  code &= ~bit;
-		}
-	      jcnt &= ~(1U << k);
-	    }
-	}
-      if (unlikely (jcnt != 0))
-	{
-	  elf_uncompress_failed ();
-	  return 0;
-	}
-    }
-
-  /* For J from 9 to 15, inclusive, we store COUNT[J] consecutive
-     values starting at START[J] with consecutive codes starting at
-     FIRSTCODE[J - 9].  In the primary table we need to point to the
-     secondary table, and the secondary table will be indexed by J - 9
-     bits.  We count down from 15 so that we install the larger
-     secondary tables first, as the smaller ones may be embedded in
-     the larger ones.  */
-
-  next_secondary = 0; /* Index of next secondary table (after primary).  */
-  for (j = 15; j >= 9; j--)
-    {
-      unsigned int jcnt;
-      unsigned int val;
-      size_t primary; /* Current primary index.  */
-      size_t secondary; /* Offset to current secondary table.  */
-      size_t secondary_bits; /* Bit size of current secondary table.  */
-
-      jcnt = count[j];
-      if (jcnt == 0)
-	continue;
-
-      val = start[j];
-      code = firstcode[j - 9];
-      primary = 0x100;
-      secondary = 0;
-      secondary_bits = 0;
-      for (i = 0; i < jcnt; ++i)
-	{
-	  uint16_t tval;
-	  size_t ind;
-	  unsigned int incr;
-
-	  if ((code & 0xff) != primary)
-	    {
-	      uint16_t tprimary;
-
-	      /* Fill in a new primary table entry.  */
-
-	      primary = code & 0xff;
-
-	      tprimary = table[primary];
-	      if (tprimary == 0)
-		{
-		  /* Start a new secondary table.  */
-
-		  if (unlikely ((next_secondary & HUFFMAN_VALUE_MASK)
-				!= next_secondary))
-		    {
-		      elf_uncompress_failed ();
-		      return 0;
-		    }
-
-		  secondary = next_secondary;
-		  secondary_bits = j - 8;
-		  next_secondary += 1 << secondary_bits;
-		  table[primary] = (secondary
-				    + ((j - 8) << HUFFMAN_BITS_SHIFT)
-				    + (1U << HUFFMAN_SECONDARY_SHIFT));
-		}
-	      else
-		{
-		  /* There is an existing entry.  It had better be a
-		     secondary table with enough bits.  */
-		  if (unlikely ((tprimary & (1U << HUFFMAN_SECONDARY_SHIFT))
-				== 0))
-		    {
-		      elf_uncompress_failed ();
-		      return 0;
-		    }
-		  secondary = tprimary & HUFFMAN_VALUE_MASK;
-		  secondary_bits = ((tprimary >> HUFFMAN_BITS_SHIFT)
-				    & HUFFMAN_BITS_MASK);
-		  if (unlikely (secondary_bits < j - 8))
-		    {
-		      elf_uncompress_failed ();
-		      return 0;
-		    }
-		}
-	    }
-
-	  /* Fill in secondary table entries.  */
-
-	  tval = val | ((j - 8) << HUFFMAN_BITS_SHIFT);
-
-	  for (ind = code >> 8;
-	       ind < (1U << secondary_bits);
-	       ind += 1U << (j - 8))
-	    {
-	      if (unlikely (table[secondary + 0x100 + ind] != 0))
-		{
-		  elf_uncompress_failed ();
-		  return 0;
-		}
-	      table[secondary + 0x100 + ind] = tval;
-	    }
-
-	  if (i + 1 < jcnt)
-	    val = next[val];
-
-	  incr = 1U << (j - 1);
-	  while ((code & incr) != 0)
-	    incr >>= 1;
-	  if (incr == 0)
-	    code = 0;
-	  else
-	    {
-	      code &= incr - 1;
-	      code += incr;
-	    }
-	}
-    }
-
-#ifdef BACKTRACE_GENERATE_FIXED_HUFFMAN_TABLE
-  final_next_secondary = next_secondary;
-#endif
-
-  return 1;
-}
-
-#ifdef BACKTRACE_GENERATE_FIXED_HUFFMAN_TABLE
-
-/* Used to generate the fixed Huffman table for block type 1.  */
-
-#include <stdio.h>
-
-static uint16_t table[ZDEBUG_TABLE_SIZE];
-static unsigned char codes[288];
-
-int
-main ()
-{
-  size_t i;
-
-  for (i = 0; i <= 143; ++i)
-    codes[i] = 8;
-  for (i = 144; i <= 255; ++i)
-    codes[i] = 9;
-  for (i = 256; i <= 279; ++i)
-    codes[i] = 7;
-  for (i = 280; i <= 287; ++i)
-    codes[i] = 8;
-  if (!elf_zlib_inflate_table (&codes[0], 288, &table[0], &table[0]))
-    {
-      fprintf (stderr, "elf_zlib_inflate_table failed\n");
-      exit (EXIT_FAILURE);
-    }
-
-  printf ("static const uint16_t elf_zlib_default_table[%#zx] =\n",
-	  final_next_secondary + 0x100);
-  printf ("{\n");
-  for (i = 0; i < final_next_secondary + 0x100; i += 8)
-    {
-      size_t j;
-
-      printf (" ");
-      for (j = i; j < final_next_secondary + 0x100 && j < i + 8; ++j)
-	printf (" %#x,", table[j]);
-      printf ("\n");
-    }
-  printf ("};\n");
-  printf ("\n");
-
-  for (i = 0; i < 32; ++i)
-    codes[i] = 5;
-  if (!elf_zlib_inflate_table (&codes[0], 32, &table[0], &table[0]))
-    {
-      fprintf (stderr, "elf_zlib_inflate_table failed\n");
-      exit (EXIT_FAILURE);
-    }
-
-  printf ("static const uint16_t elf_zlib_default_dist_table[%#zx] =\n",
-	  final_next_secondary + 0x100);
-  printf ("{\n");
-  for (i = 0; i < final_next_secondary + 0x100; i += 8)
-    {
-      size_t j;
-
-      printf (" ");
-      for (j = i; j < final_next_secondary + 0x100 && j < i + 8; ++j)
-	printf (" %#x,", table[j]);
-      printf ("\n");
-    }
-  printf ("};\n");
-
-  return 0;
-}
-
-#endif
-
-/* The fixed tables generated by the #ifdef'ed out main function
-   above.  */
-
-static const uint16_t elf_zlib_default_table[0x170] =
-{
-  0xd00, 0xe50, 0xe10, 0xf18, 0xd10, 0xe70, 0xe30, 0x1230,
-  0xd08, 0xe60, 0xe20, 0x1210, 0xe00, 0xe80, 0xe40, 0x1250,
-  0xd04, 0xe58, 0xe18, 0x1200, 0xd14, 0xe78, 0xe38, 0x1240,
-  0xd0c, 0xe68, 0xe28, 0x1220, 0xe08, 0xe88, 0xe48, 0x1260,
-  0xd02, 0xe54, 0xe14, 0xf1c, 0xd12, 0xe74, 0xe34, 0x1238,
-  0xd0a, 0xe64, 0xe24, 0x1218, 0xe04, 0xe84, 0xe44, 0x1258,
-  0xd06, 0xe5c, 0xe1c, 0x1208, 0xd16, 0xe7c, 0xe3c, 0x1248,
-  0xd0e, 0xe6c, 0xe2c, 0x1228, 0xe0c, 0xe8c, 0xe4c, 0x1268,
-  0xd01, 0xe52, 0xe12, 0xf1a, 0xd11, 0xe72, 0xe32, 0x1234,
-  0xd09, 0xe62, 0xe22, 0x1214, 0xe02, 0xe82, 0xe42, 0x1254,
-  0xd05, 0xe5a, 0xe1a, 0x1204, 0xd15, 0xe7a, 0xe3a, 0x1244,
-  0xd0d, 0xe6a, 0xe2a, 0x1224, 0xe0a, 0xe8a, 0xe4a, 0x1264,
-  0xd03, 0xe56, 0xe16, 0xf1e, 0xd13, 0xe76, 0xe36, 0x123c,
-  0xd0b, 0xe66, 0xe26, 0x121c, 0xe06, 0xe86, 0xe46, 0x125c,
-  0xd07, 0xe5e, 0xe1e, 0x120c, 0xd17, 0xe7e, 0xe3e, 0x124c,
-  0xd0f, 0xe6e, 0xe2e, 0x122c, 0xe0e, 0xe8e, 0xe4e, 0x126c,
-  0xd00, 0xe51, 0xe11, 0xf19, 0xd10, 0xe71, 0xe31, 0x1232,
-  0xd08, 0xe61, 0xe21, 0x1212, 0xe01, 0xe81, 0xe41, 0x1252,
-  0xd04, 0xe59, 0xe19, 0x1202, 0xd14, 0xe79, 0xe39, 0x1242,
-  0xd0c, 0xe69, 0xe29, 0x1222, 0xe09, 0xe89, 0xe49, 0x1262,
-  0xd02, 0xe55, 0xe15, 0xf1d, 0xd12, 0xe75, 0xe35, 0x123a,
-  0xd0a, 0xe65, 0xe25, 0x121a, 0xe05, 0xe85, 0xe45, 0x125a,
-  0xd06, 0xe5d, 0xe1d, 0x120a, 0xd16, 0xe7d, 0xe3d, 0x124a,
-  0xd0e, 0xe6d, 0xe2d, 0x122a, 0xe0d, 0xe8d, 0xe4d, 0x126a,
-  0xd01, 0xe53, 0xe13, 0xf1b, 0xd11, 0xe73, 0xe33, 0x1236,
-  0xd09, 0xe63, 0xe23, 0x1216, 0xe03, 0xe83, 0xe43, 0x1256,
-  0xd05, 0xe5b, 0xe1b, 0x1206, 0xd15, 0xe7b, 0xe3b, 0x1246,
-  0xd0d, 0xe6b, 0xe2b, 0x1226, 0xe0b, 0xe8b, 0xe4b, 0x1266,
-  0xd03, 0xe57, 0xe17, 0xf1f, 0xd13, 0xe77, 0xe37, 0x123e,
-  0xd0b, 0xe67, 0xe27, 0x121e, 0xe07, 0xe87, 0xe47, 0x125e,
-  0xd07, 0xe5f, 0xe1f, 0x120e, 0xd17, 0xe7f, 0xe3f, 0x124e,
-  0xd0f, 0xe6f, 0xe2f, 0x122e, 0xe0f, 0xe8f, 0xe4f, 0x126e,
-  0x290, 0x291, 0x292, 0x293, 0x294, 0x295, 0x296, 0x297,
-  0x298, 0x299, 0x29a, 0x29b, 0x29c, 0x29d, 0x29e, 0x29f,
-  0x2a0, 0x2a1, 0x2a2, 0x2a3, 0x2a4, 0x2a5, 0x2a6, 0x2a7,
-  0x2a8, 0x2a9, 0x2aa, 0x2ab, 0x2ac, 0x2ad, 0x2ae, 0x2af,
-  0x2b0, 0x2b1, 0x2b2, 0x2b3, 0x2b4, 0x2b5, 0x2b6, 0x2b7,
-  0x2b8, 0x2b9, 0x2ba, 0x2bb, 0x2bc, 0x2bd, 0x2be, 0x2bf,
-  0x2c0, 0x2c1, 0x2c2, 0x2c3, 0x2c4, 0x2c5, 0x2c6, 0x2c7,
-  0x2c8, 0x2c9, 0x2ca, 0x2cb, 0x2cc, 0x2cd, 0x2ce, 0x2cf,
-  0x2d0, 0x2d1, 0x2d2, 0x2d3, 0x2d4, 0x2d5, 0x2d6, 0x2d7,
-  0x2d8, 0x2d9, 0x2da, 0x2db, 0x2dc, 0x2dd, 0x2de, 0x2df,
-  0x2e0, 0x2e1, 0x2e2, 0x2e3, 0x2e4, 0x2e5, 0x2e6, 0x2e7,
-  0x2e8, 0x2e9, 0x2ea, 0x2eb, 0x2ec, 0x2ed, 0x2ee, 0x2ef,
-  0x2f0, 0x2f1, 0x2f2, 0x2f3, 0x2f4, 0x2f5, 0x2f6, 0x2f7,
-  0x2f8, 0x2f9, 0x2fa, 0x2fb, 0x2fc, 0x2fd, 0x2fe, 0x2ff,
-};
-
-static const uint16_t elf_zlib_default_dist_table[0x100] =
-{
-  0x800, 0x810, 0x808, 0x818, 0x804, 0x814, 0x80c, 0x81c,
-  0x802, 0x812, 0x80a, 0x81a, 0x806, 0x816, 0x80e, 0x81e,
-  0x801, 0x811, 0x809, 0x819, 0x805, 0x815, 0x80d, 0x81d,
-  0x803, 0x813, 0x80b, 0x81b, 0x807, 0x817, 0x80f, 0x81f,
-  0x800, 0x810, 0x808, 0x818, 0x804, 0x814, 0x80c, 0x81c,
-  0x802, 0x812, 0x80a, 0x81a, 0x806, 0x816, 0x80e, 0x81e,
-  0x801, 0x811, 0x809, 0x819, 0x805, 0x815, 0x80d, 0x81d,
-  0x803, 0x813, 0x80b, 0x81b, 0x807, 0x817, 0x80f, 0x81f,
-  0x800, 0x810, 0x808, 0x818, 0x804, 0x814, 0x80c, 0x81c,
-  0x802, 0x812, 0x80a, 0x81a, 0x806, 0x816, 0x80e, 0x81e,
-  0x801, 0x811, 0x809, 0x819, 0x805, 0x815, 0x80d, 0x81d,
-  0x803, 0x813, 0x80b, 0x81b, 0x807, 0x817, 0x80f, 0x81f,
-  0x800, 0x810, 0x808, 0x818, 0x804, 0x814, 0x80c, 0x81c,
-  0x802, 0x812, 0x80a, 0x81a, 0x806, 0x816, 0x80e, 0x81e,
-  0x801, 0x811, 0x809, 0x819, 0x805, 0x815, 0x80d, 0x81d,
-  0x803, 0x813, 0x80b, 0x81b, 0x807, 0x817, 0x80f, 0x81f,
-  0x800, 0x810, 0x808, 0x818, 0x804, 0x814, 0x80c, 0x81c,
-  0x802, 0x812, 0x80a, 0x81a, 0x806, 0x816, 0x80e, 0x81e,
-  0x801, 0x811, 0x809, 0x819, 0x805, 0x815, 0x80d, 0x81d,
-  0x803, 0x813, 0x80b, 0x81b, 0x807, 0x817, 0x80f, 0x81f,
-  0x800, 0x810, 0x808, 0x818, 0x804, 0x814, 0x80c, 0x81c,
-  0x802, 0x812, 0x80a, 0x81a, 0x806, 0x816, 0x80e, 0x81e,
-  0x801, 0x811, 0x809, 0x819, 0x805, 0x815, 0x80d, 0x81d,
-  0x803, 0x813, 0x80b, 0x81b, 0x807, 0x817, 0x80f, 0x81f,
-  0x800, 0x810, 0x808, 0x818, 0x804, 0x814, 0x80c, 0x81c,
-  0x802, 0x812, 0x80a, 0x81a, 0x806, 0x816, 0x80e, 0x81e,
-  0x801, 0x811, 0x809, 0x819, 0x805, 0x815, 0x80d, 0x81d,
-  0x803, 0x813, 0x80b, 0x81b, 0x807, 0x817, 0x80f, 0x81f,
-  0x800, 0x810, 0x808, 0x818, 0x804, 0x814, 0x80c, 0x81c,
-  0x802, 0x812, 0x80a, 0x81a, 0x806, 0x816, 0x80e, 0x81e,
-  0x801, 0x811, 0x809, 0x819, 0x805, 0x815, 0x80d, 0x81d,
-  0x803, 0x813, 0x80b, 0x81b, 0x807, 0x817, 0x80f, 0x81f,
-};
-
-/* Inflate a zlib stream from PIN/SIN to POUT/SOUT.  Return 1 on
-   success, 0 on some error parsing the stream.  */
-
-static int
-elf_zlib_inflate (const unsigned char *pin, size_t sin, uint16_t *zdebug_table,
-		  unsigned char *pout, size_t sout)
-{
-  unsigned char *porigout;
-  const unsigned char *pinend;
-  unsigned char *poutend;
-
-  /* We can apparently see multiple zlib streams concatenated
-     together, so keep going as long as there is something to read.
-     The last 4 bytes are the checksum.  */
-  porigout = pout;
-  pinend = pin + sin;
-  poutend = pout + sout;
-  while ((pinend - pin) > 4)
-    {
-      uint64_t val;
-      unsigned int bits;
-      int last;
-
-      /* Read the two byte zlib header.  */
-
-      if (unlikely ((pin[0] & 0xf) != 8)) /* 8 is zlib encoding.  */
-	{
-	  /* Unknown compression method.  */
-	  elf_uncompress_failed ();
-	  return 0;
-	}
-      if (unlikely ((pin[0] >> 4) > 7))
-	{
-	  /* Window size too large.  Other than this check, we don't
-	     care about the window size.  */
-	  elf_uncompress_failed ();
-	  return 0;
-	}
-      if (unlikely ((pin[1] & 0x20) != 0))
-	{
-	  /* Stream expects a predefined dictionary, but we have no
-	     dictionary.  */
-	  elf_uncompress_failed ();
-	  return 0;
-	}
-      val = (pin[0] << 8) | pin[1];
-      if (unlikely (val % 31 != 0))
-	{
-	  /* Header check failure.  */
-	  elf_uncompress_failed ();
-	  return 0;
-	}
-      pin += 2;
-
-      /* Align PIN to a 32-bit boundary.  */
-
-      val = 0;
-      bits = 0;
-      while ((((uintptr_t) pin) & 3) != 0)
-	{
-	  val |= (uint64_t)*pin << bits;
-	  bits += 8;
-	  ++pin;
-	}
-
-      /* Read blocks until one is marked last.  */
-
-      last = 0;
-
-      while (!last)
-	{
-	  unsigned int type;
-	  const uint16_t *tlit;
-	  const uint16_t *tdist;
-
-	  if (!elf_zlib_fetch (&pin, pinend, &val, &bits))
-	    return 0;
-
-	  last = val & 1;
-	  type = (val >> 1) & 3;
-	  val >>= 3;
-	  bits -= 3;
-
-	  if (unlikely (type == 3))
-	    {
-	      /* Invalid block type.  */
-	      elf_uncompress_failed ();
-	      return 0;
-	    }
-
-	  if (type == 0)
-	    {
-	      uint16_t len;
-	      uint16_t lenc;
-
-	      /* An uncompressed block.  */
-
-	      /* If we've read ahead more than a byte, back up.  */
-	      while (bits >= 8)
-		{
-		  --pin;
-		  bits -= 8;
-		}
-
-	      val = 0;
-	      bits = 0;
-	      if (unlikely ((pinend - pin) < 4))
-		{
-		  /* Missing length.  */
-		  elf_uncompress_failed ();
-		  return 0;
-		}
-	      len = pin[0] | (pin[1] << 8);
-	      lenc = pin[2] | (pin[3] << 8);
-	      pin += 4;
-	      lenc = ~lenc;
-	      if (unlikely (len != lenc))
-		{
-		  /* Corrupt data.  */
-		  elf_uncompress_failed ();
-		  return 0;
-		}
-	      if (unlikely (len > (unsigned int) (pinend - pin)
-			    || len > (unsigned int) (poutend - pout)))
-		{
-		  /* Not enough space in buffers.  */
-		  elf_uncompress_failed ();
-		  return 0;
-		}
-	      memcpy (pout, pin, len);
-	      pout += len;
-	      pin += len;
-
-	      /* Align PIN.  */
-	      while ((((uintptr_t) pin) & 3) != 0)
-		{
-		  val |= (uint64_t)*pin << bits;
-		  bits += 8;
-		  ++pin;
-		}
-
-	      /* Go around to read the next block.  */
-	      continue;
-	    }
-
-	  if (type == 1)
-	    {
-	      tlit = elf_zlib_default_table;
-	      tdist = elf_zlib_default_dist_table;
-	    }
-	  else
-	    {
-	      unsigned int nlit;
-	      unsigned int ndist;
-	      unsigned int nclen;
-	      unsigned char codebits[19];
-	      unsigned char *plenbase;
-	      unsigned char *plen;
-	      unsigned char *plenend;
-
-	      /* Read a Huffman encoding table.  The various magic
-		 numbers here are from RFC 1951.  */
-
-	      if (!elf_zlib_fetch (&pin, pinend, &val, &bits))
-		return 0;
-
-	      nlit = (val & 0x1f) + 257;
-	      val >>= 5;
-	      ndist = (val & 0x1f) + 1;
-	      val >>= 5;
-	      nclen = (val & 0xf) + 4;
-	      val >>= 4;
-	      bits -= 14;
-	      if (unlikely (nlit > 286 || ndist > 30))
-		{
-		  /* Values out of range.  */
-		  elf_uncompress_failed ();
-		  return 0;
-		}
-
-	      /* Read and build the table used to compress the
-		 literal, length, and distance codes.  */
-
-	      memset(&codebits[0], 0, 19);
-
-	      /* There are always at least 4 elements in the
-		 table.  */
-
-	      if (!elf_zlib_fetch (&pin, pinend, &val, &bits))
-		return 0;
-
-	      codebits[16] = val & 7;
-	      codebits[17] = (val >> 3) & 7;
-	      codebits[18] = (val >> 6) & 7;
-	      codebits[0] = (val >> 9) & 7;
-	      val >>= 12;
-	      bits -= 12;
-
-	      if (nclen == 4)
-		goto codebitsdone;
-
-	      codebits[8] = val & 7;
-	      val >>= 3;
-	      bits -= 3;
-
-	      if (nclen == 5)
-		goto codebitsdone;
-
-	      if (!elf_zlib_fetch (&pin, pinend, &val, &bits))
-		return 0;
-
-	      codebits[7] = val & 7;
-	      val >>= 3;
-	      bits -= 3;
-
-	      if (nclen == 6)
-		goto codebitsdone;
-
-	      codebits[9] = val & 7;
-	      val >>= 3;
-	      bits -= 3;
-
-	      if (nclen == 7)
-		goto codebitsdone;
-
-	      codebits[6] = val & 7;
-	      val >>= 3;
-	      bits -= 3;
-
-	      if (nclen == 8)
-		goto codebitsdone;
-
-	      codebits[10] = val & 7;
-	      val >>= 3;
-	      bits -= 3;
-
-	      if (nclen == 9)
-		goto codebitsdone;
-
-	      codebits[5] = val & 7;
-	      val >>= 3;
-	      bits -= 3;
-
-	      if (nclen == 10)
-		goto codebitsdone;
-
-	      if (!elf_zlib_fetch (&pin, pinend, &val, &bits))
-		return 0;
-
-	      codebits[11] = val & 7;
-	      val >>= 3;
-	      bits -= 3;
-
-	      if (nclen == 11)
-		goto codebitsdone;
-
-	      codebits[4] = val & 7;
-	      val >>= 3;
-	      bits -= 3;
-
-	      if (nclen == 12)
-		goto codebitsdone;
-
-	      codebits[12] = val & 7;
-	      val >>= 3;
-	      bits -= 3;
-
-	      if (nclen == 13)
-		goto codebitsdone;
-
-	      codebits[3] = val & 7;
-	      val >>= 3;
-	      bits -= 3;
-
-	      if (nclen == 14)
-		goto codebitsdone;
-
-	      codebits[13] = val & 7;
-	      val >>= 3;
-	      bits -= 3;
-
-	      if (nclen == 15)
-		goto codebitsdone;
-
-	      if (!elf_zlib_fetch (&pin, pinend, &val, &bits))
-		return 0;
-
-	      codebits[2] = val & 7;
-	      val >>= 3;
-	      bits -= 3;
-
-	      if (nclen == 16)
-		goto codebitsdone;
-
-	      codebits[14] = val & 7;
-	      val >>= 3;
-	      bits -= 3;
-
-	      if (nclen == 17)
-		goto codebitsdone;
-
-	      codebits[1] = val & 7;
-	      val >>= 3;
-	      bits -= 3;
-
-	      if (nclen == 18)
-		goto codebitsdone;
-
-	      codebits[15] = val & 7;
-	      val >>= 3;
-	      bits -= 3;
-
-	    codebitsdone:
-
-	      if (!elf_zlib_inflate_table (codebits, 19, zdebug_table,
-					   zdebug_table))
-		return 0;
-
-	      /* Read the compressed bit lengths of the literal,
-		 length, and distance codes.  We have allocated space
-		 at the end of zdebug_table to hold them.  */
-
-	      plenbase = (((unsigned char *) zdebug_table)
-			  + ZDEBUG_TABLE_CODELEN_OFFSET);
-	      plen = plenbase;
-	      plenend = plen + nlit + ndist;
-	      while (plen < plenend)
-		{
-		  uint16_t t;
-		  unsigned int b;
-		  uint16_t v;
-
-		  if (!elf_zlib_fetch (&pin, pinend, &val, &bits))
-		    return 0;
-
-		  t = zdebug_table[val & 0xff];
-
-		  /* The compression here uses bit lengths up to 7, so
-		     a secondary table is never necessary.  */
-		  if (unlikely ((t & (1U << HUFFMAN_SECONDARY_SHIFT)) != 0))
-		    {
-		      elf_uncompress_failed ();
-		      return 0;
-		    }
-
-		  b = (t >> HUFFMAN_BITS_SHIFT) & HUFFMAN_BITS_MASK;
-		  val >>= b + 1;
-		  bits -= b + 1;
-
-		  v = t & HUFFMAN_VALUE_MASK;
-		  if (v < 16)
-		    *plen++ = v;
-		  else if (v == 16)
-		    {
-		      unsigned int c;
-		      unsigned int prev;
-
-		      /* Copy previous entry 3 to 6 times.  */
-
-		      if (unlikely (plen == plenbase))
-			{
-			  elf_uncompress_failed ();
-			  return 0;
-			}
-
-		      /* We used up to 7 bits since the last
-			 elf_zlib_fetch, so we have at least 8 bits
-			 available here.  */
-
-		      c = 3 + (val & 0x3);
-		      val >>= 2;
-		      bits -= 2;
-		      if (unlikely ((unsigned int) (plenend - plen) < c))
-			{
-			  elf_uncompress_failed ();
-			  return 0;
-			}
-
-		      prev = plen[-1];
-		      switch (c)
-			{
-			case 6:
-			  *plen++ = prev;
-			  ATTRIBUTE_FALLTHROUGH;
-			case 5:
-			  *plen++ = prev;
-			  ATTRIBUTE_FALLTHROUGH;
-			case 4:
-			  *plen++ = prev;
-			}
-		      *plen++ = prev;
-		      *plen++ = prev;
-		      *plen++ = prev;
-		    }
-		  else if (v == 17)
-		    {
-		      unsigned int c;
-
-		      /* Store zero 3 to 10 times.  */
-
-		      /* We used up to 7 bits since the last
-			 elf_zlib_fetch, so we have at least 8 bits
-			 available here.  */
-
-		      c = 3 + (val & 0x7);
-		      val >>= 3;
-		      bits -= 3;
-		      if (unlikely ((unsigned int) (plenend - plen) < c))
-			{
-			  elf_uncompress_failed ();
-			  return 0;
-			}
-
-		      switch (c)
-			{
-			case 10:
-			  *plen++ = 0;
-			  ATTRIBUTE_FALLTHROUGH;
-			case 9:
-			  *plen++ = 0;
-			  ATTRIBUTE_FALLTHROUGH;
-			case 8:
-			  *plen++ = 0;
-			  ATTRIBUTE_FALLTHROUGH;
-			case 7:
-			  *plen++ = 0;
-			  ATTRIBUTE_FALLTHROUGH;
-			case 6:
-			  *plen++ = 0;
-			  ATTRIBUTE_FALLTHROUGH;
-			case 5:
-			  *plen++ = 0;
-			  ATTRIBUTE_FALLTHROUGH;
-			case 4:
-			  *plen++ = 0;
-			}
-		      *plen++ = 0;
-		      *plen++ = 0;
-		      *plen++ = 0;
-		    }
-		  else if (v == 18)
-		    {
-		      unsigned int c;
-
-		      /* Store zero 11 to 138 times.  */
-
-		      /* We used up to 7 bits since the last
-			 elf_zlib_fetch, so we have at least 8 bits
-			 available here.  */
-
-		      c = 11 + (val & 0x7f);
-		      val >>= 7;
-		      bits -= 7;
-		      if (unlikely ((unsigned int) (plenend - plen) < c))
-			{
-			  elf_uncompress_failed ();
-			  return 0;
-			}
-
-		      memset (plen, 0, c);
-		      plen += c;
-		    }
-		  else
-		    {
-		      elf_uncompress_failed ();
-		      return 0;
-		    }
-		}
-
-	      /* Make sure that the stop code can appear.  */
-
-	      plen = plenbase;
-	      if (unlikely (plen[256] == 0))
-		{
-		  elf_uncompress_failed ();
-		  return 0;
-		}
-
-	      /* Build the decompression tables.  */
-
-	      if (!elf_zlib_inflate_table (plen, nlit, zdebug_table,
-					   zdebug_table))
-		return 0;
-	      if (!elf_zlib_inflate_table (plen + nlit, ndist, zdebug_table,
-					   zdebug_table + HUFFMAN_TABLE_SIZE))
-		return 0;
-	      tlit = zdebug_table;
-	      tdist = zdebug_table + HUFFMAN_TABLE_SIZE;
-	    }
-
-	  /* Inflate values until the end of the block.  This is the
-	     main loop of the inflation code.  */
-
-	  while (1)
-	    {
-	      uint16_t t;
-	      unsigned int b;
-	      uint16_t v;
-	      unsigned int lit;
-
-	      if (!elf_zlib_fetch (&pin, pinend, &val, &bits))
-		return 0;
-
-	      t = tlit[val & 0xff];
-	      b = (t >> HUFFMAN_BITS_SHIFT) & HUFFMAN_BITS_MASK;
-	      v = t & HUFFMAN_VALUE_MASK;
-
-	      if ((t & (1U << HUFFMAN_SECONDARY_SHIFT)) == 0)
-		{
-		  lit = v;
-		  val >>= b + 1;
-		  bits -= b + 1;
-		}
-	      else
-		{
-		  t = tlit[v + 0x100 + ((val >> 8) & ((1U << b) - 1))];
-		  b = (t >> HUFFMAN_BITS_SHIFT) & HUFFMAN_BITS_MASK;
-		  lit = t & HUFFMAN_VALUE_MASK;
-		  val >>= b + 8;
-		  bits -= b + 8;
-		}
-
-	      if (lit < 256)
-		{
-		  if (unlikely (pout == poutend))
-		    {
-		      elf_uncompress_failed ();
-		      return 0;
-		    }
-
-		  *pout++ = lit;
-
-		  /* We will need to write the next byte soon.  We ask
-		     for high temporal locality because we will write
-		     to the whole cache line soon.  */
-		  __builtin_prefetch (pout, 1, 3);
-		}
-	      else if (lit == 256)
-		{
-		  /* The end of the block.  */
-		  break;
-		}
-	      else
-		{
-		  unsigned int dist;
-		  unsigned int len;
-
-		  /* Convert lit into a length.  */
-
-		  if (lit < 265)
-		    len = lit - 257 + 3;
-		  else if (lit == 285)
-		    len = 258;
-		  else if (unlikely (lit > 285))
-		    {
-		      elf_uncompress_failed ();
-		      return 0;
-		    }
-		  else
-		    {
-		      unsigned int extra;
-
-		      if (!elf_zlib_fetch (&pin, pinend, &val, &bits))
-			return 0;
-
-		      /* This is an expression for the table of length
-			 codes in RFC 1951 3.2.5.  */
-		      lit -= 265;
-		      extra = (lit >> 2) + 1;
-		      len = (lit & 3) << extra;
-		      len += 11;
-		      len += ((1U << (extra - 1)) - 1) << 3;
-		      len += val & ((1U << extra) - 1);
-		      val >>= extra;
-		      bits -= extra;
-		    }
-
-		  if (!elf_zlib_fetch (&pin, pinend, &val, &bits))
-		    return 0;
-
-		  t = tdist[val & 0xff];
-		  b = (t >> HUFFMAN_BITS_SHIFT) & HUFFMAN_BITS_MASK;
-		  v = t & HUFFMAN_VALUE_MASK;
-
-		  if ((t & (1U << HUFFMAN_SECONDARY_SHIFT)) == 0)
-		    {
-		      dist = v;
-		      val >>= b + 1;
-		      bits -= b + 1;
-		    }
-		  else
-		    {
-		      t = tdist[v + 0x100 + ((val >> 8) & ((1U << b) - 1))];
-		      b = (t >> HUFFMAN_BITS_SHIFT) & HUFFMAN_BITS_MASK;
-		      dist = t & HUFFMAN_VALUE_MASK;
-		      val >>= b + 8;
-		      bits -= b + 8;
-		    }
-
-		  /* Convert dist to a distance.  */
-
-		  if (dist == 0)
-		    {
-		      /* A distance of 1.  A common case, meaning
-			 repeat the last character LEN times.  */
-
-		      if (unlikely (pout == porigout))
-			{
-			  elf_uncompress_failed ();
-			  return 0;
-			}
-
-		      if (unlikely ((unsigned int) (poutend - pout) < len))
-			{
-			  elf_uncompress_failed ();
-			  return 0;
-			}
-
-		      memset (pout, pout[-1], len);
-		      pout += len;
-		    }
-		  else if (unlikely (dist > 29))
-		    {
-		      elf_uncompress_failed ();
-		      return 0;
-		    }
-		  else
-		    {
-		      if (dist < 4)
-			dist = dist + 1;
-		      else
-			{
-			  unsigned int extra;
-
-			  if (!elf_zlib_fetch (&pin, pinend, &val, &bits))
-			    return 0;
-
-			  /* This is an expression for the table of
-			     distance codes in RFC 1951 3.2.5.  */
-			  dist -= 4;
-			  extra = (dist >> 1) + 1;
-			  dist = (dist & 1) << extra;
-			  dist += 5;
-			  dist += ((1U << (extra - 1)) - 1) << 2;
-			  dist += val & ((1U << extra) - 1);
-			  val >>= extra;
-			  bits -= extra;
-			}
-
-		      /* Go back dist bytes, and copy len bytes from
-			 there.  */
-
-		      if (unlikely ((unsigned int) (pout - porigout) < dist))
-			{
-			  elf_uncompress_failed ();
-			  return 0;
-			}
-
-		      if (unlikely ((unsigned int) (poutend - pout) < len))
-			{
-			  elf_uncompress_failed ();
-			  return 0;
-			}
-
-		      if (dist >= len)
-			{
-			  memcpy (pout, pout - dist, len);
-			  pout += len;
-			}
-		      else
-			{
-			  while (len > 0)
-			    {
-			      unsigned int copy;
-
-			      copy = len < dist ? len : dist;
-			      memcpy (pout, pout - dist, copy);
-			      len -= copy;
-			      pout += copy;
-			    }
-			}
-		    }
-		}
-	    }
-	}
-    }
-
-  /* We should have filled the output buffer.  */
-  if (unlikely (pout != poutend))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-
-  return 1;
-}
-
-/* Verify the zlib checksum.  The checksum is in the 4 bytes at
-   CHECKBYTES, and the uncompressed data is at UNCOMPRESSED /
-   UNCOMPRESSED_SIZE.  Returns 1 on success, 0 on failure.  */
-
-static int
-elf_zlib_verify_checksum (const unsigned char *checkbytes,
-			  const unsigned char *uncompressed,
-			  size_t uncompressed_size)
-{
-  unsigned int i;
-  unsigned int cksum;
-  const unsigned char *p;
-  uint32_t s1;
-  uint32_t s2;
-  size_t hsz;
-
-  cksum = 0;
-  for (i = 0; i < 4; i++)
-    cksum = (cksum << 8) | checkbytes[i];
-
-  s1 = 1;
-  s2 = 0;
-
-  /* Minimize modulo operations.  */
-
-  p = uncompressed;
-  hsz = uncompressed_size;
-  while (hsz >= 5552)
-    {
-      for (i = 0; i < 5552; i += 16)
-	{
-	  /* Manually unroll loop 16 times.  */
-	  s1 = s1 + *p++;
-	  s2 = s2 + s1;
-	  s1 = s1 + *p++;
-	  s2 = s2 + s1;
-	  s1 = s1 + *p++;
-	  s2 = s2 + s1;
-	  s1 = s1 + *p++;
-	  s2 = s2 + s1;
-	  s1 = s1 + *p++;
-	  s2 = s2 + s1;
-	  s1 = s1 + *p++;
-	  s2 = s2 + s1;
-	  s1 = s1 + *p++;
-	  s2 = s2 + s1;
-	  s1 = s1 + *p++;
-	  s2 = s2 + s1;
-	  s1 = s1 + *p++;
-	  s2 = s2 + s1;
-	  s1 = s1 + *p++;
-	  s2 = s2 + s1;
-	  s1 = s1 + *p++;
-	  s2 = s2 + s1;
-	  s1 = s1 + *p++;
-	  s2 = s2 + s1;
-	  s1 = s1 + *p++;
-	  s2 = s2 + s1;
-	  s1 = s1 + *p++;
-	  s2 = s2 + s1;
-	  s1 = s1 + *p++;
-	  s2 = s2 + s1;
-	  s1 = s1 + *p++;
-	  s2 = s2 + s1;
-	}
-      hsz -= 5552;
-      s1 %= 65521;
-      s2 %= 65521;
-    }
-
-  while (hsz >= 16)
-    {
-      /* Manually unroll loop 16 times.  */
-      s1 = s1 + *p++;
-      s2 = s2 + s1;
-      s1 = s1 + *p++;
-      s2 = s2 + s1;
-      s1 = s1 + *p++;
-      s2 = s2 + s1;
-      s1 = s1 + *p++;
-      s2 = s2 + s1;
-      s1 = s1 + *p++;
-      s2 = s2 + s1;
-      s1 = s1 + *p++;
-      s2 = s2 + s1;
-      s1 = s1 + *p++;
-      s2 = s2 + s1;
-      s1 = s1 + *p++;
-      s2 = s2 + s1;
-      s1 = s1 + *p++;
-      s2 = s2 + s1;
-      s1 = s1 + *p++;
-      s2 = s2 + s1;
-      s1 = s1 + *p++;
-      s2 = s2 + s1;
-      s1 = s1 + *p++;
-      s2 = s2 + s1;
-      s1 = s1 + *p++;
-      s2 = s2 + s1;
-      s1 = s1 + *p++;
-      s2 = s2 + s1;
-      s1 = s1 + *p++;
-      s2 = s2 + s1;
-      s1 = s1 + *p++;
-      s2 = s2 + s1;
-
-      hsz -= 16;
-    }
-
-  for (i = 0; i < hsz; ++i)
-    {
-      s1 = s1 + *p++;
-      s2 = s2 + s1;
-    }
-
-  s1 %= 65521;
-  s2 %= 65521;
-
-  if (unlikely ((s2 << 16) + s1 != cksum))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-
-  return 1;
-}
-
-/* Inflate a zlib stream from PIN/SIN to POUT/SOUT, and verify the
-   checksum.  Return 1 on success, 0 on error.  */
-
-static int
-elf_zlib_inflate_and_verify (const unsigned char *pin, size_t sin,
-			     uint16_t *zdebug_table, unsigned char *pout,
-			     size_t sout)
-{
-  if (!elf_zlib_inflate (pin, sin, zdebug_table, pout, sout))
-    return 0;
-  if (!elf_zlib_verify_checksum (pin + sin - 4, pout, sout))
-    return 0;
-  return 1;
-}
-
-/* Uncompress the old compressed debug format, the one emitted by
-   --compress-debug-sections=zlib-gnu.  The compressed data is in
-   COMPRESSED / COMPRESSED_SIZE, and the function writes to
-   *UNCOMPRESSED / *UNCOMPRESSED_SIZE.  ZDEBUG_TABLE is work space to
-   hold Huffman tables.  Returns 0 on error, 1 on successful
-   decompression or if something goes wrong.  In general we try to
-   carry on, by returning 1, even if we can't decompress.  */
-
-static int
-elf_uncompress_zdebug (struct backtrace_state *state,
-		       const unsigned char *compressed, size_t compressed_size,
-		       uint16_t *zdebug_table,
-		       backtrace_error_callback error_callback, void *data,
-		       unsigned char **uncompressed, size_t *uncompressed_size)
-{
-  size_t sz;
-  size_t i;
-  unsigned char *po;
-
-  *uncompressed = NULL;
-  *uncompressed_size = 0;
-
-  /* The format starts with the four bytes ZLIB, followed by the 8
-     byte length of the uncompressed data in big-endian order,
-     followed by a zlib stream.  */
-
-  if (compressed_size < 12 || memcmp (compressed, "ZLIB", 4) != 0)
-    return 1;
-
-  sz = 0;
-  for (i = 0; i < 8; i++)
-    sz = (sz << 8) | compressed[i + 4];
-
-  if (*uncompressed != NULL && *uncompressed_size >= sz)
-    po = *uncompressed;
-  else
-    {
-      po = (unsigned char *) backtrace_alloc (state, sz, error_callback, data);
-      if (po == NULL)
-	return 0;
-    }
-
-  if (!elf_zlib_inflate_and_verify (compressed + 12, compressed_size - 12,
-				    zdebug_table, po, sz))
-    return 1;
-
-  *uncompressed = po;
-  *uncompressed_size = sz;
-
-  return 1;
-}
-
-/* Uncompress the new compressed debug format, the official standard
-   ELF approach emitted by --compress-debug-sections=zlib-gabi.  The
-   compressed data is in COMPRESSED / COMPRESSED_SIZE, and the
-   function writes to *UNCOMPRESSED / *UNCOMPRESSED_SIZE.
-   ZDEBUG_TABLE is work space as for elf_uncompress_zdebug.  Returns 0
-   on error, 1 on successful decompression or if something goes wrong.
-   In general we try to carry on, by returning 1, even if we can't
-   decompress.  */
-
-static int
-elf_uncompress_chdr (struct backtrace_state *state,
-		     const unsigned char *compressed, size_t compressed_size,
-		     uint16_t *zdebug_table,
-		     backtrace_error_callback error_callback, void *data,
-		     unsigned char **uncompressed, size_t *uncompressed_size)
-{
-  const b_elf_chdr *chdr;
-  unsigned char *po;
-
-  *uncompressed = NULL;
-  *uncompressed_size = 0;
-
-  /* The format starts with an ELF compression header.  */
-  if (compressed_size < sizeof (b_elf_chdr))
-    return 1;
-
-  chdr = (const b_elf_chdr *) compressed;
-
-  if (chdr->ch_type != ELFCOMPRESS_ZLIB)
-    {
-      /* Unsupported compression algorithm.  */
-      return 1;
-    }
-
-  if (*uncompressed != NULL && *uncompressed_size >= chdr->ch_size)
-    po = *uncompressed;
-  else
-    {
-      po = (unsigned char *) backtrace_alloc (state, chdr->ch_size,
-					      error_callback, data);
-      if (po == NULL)
-	return 0;
-    }
-
-  if (!elf_zlib_inflate_and_verify (compressed + sizeof (b_elf_chdr),
-				    compressed_size - sizeof (b_elf_chdr),
-				    zdebug_table, po, chdr->ch_size))
-    return 1;
-
-  *uncompressed = po;
-  *uncompressed_size = chdr->ch_size;
-
-  return 1;
-}
-
-/* This function is a hook for testing the zlib support.  It is only
-   used by tests.  */
-
-int
-backtrace_uncompress_zdebug (struct backtrace_state *state,
-			     const unsigned char *compressed,
-			     size_t compressed_size,
-			     backtrace_error_callback error_callback,
-			     void *data, unsigned char **uncompressed,
-			     size_t *uncompressed_size)
-{
-  uint16_t *zdebug_table;
-  int ret;
-
-  zdebug_table = ((uint16_t *) backtrace_alloc (state, ZDEBUG_TABLE_SIZE,
-						error_callback, data));
-  if (zdebug_table == NULL)
-    return 0;
-  ret = elf_uncompress_zdebug (state, compressed, compressed_size,
-			       zdebug_table, error_callback, data,
-			       uncompressed, uncompressed_size);
-  backtrace_free (state, zdebug_table, ZDEBUG_TABLE_SIZE,
-		  error_callback, data);
-  return ret;
-}
-
-/* Number of LZMA states.  */
-#define LZMA_STATES (12)
-
-/* Number of LZMA position states.  The pb value of the property byte
-   is the number of bits to include in these states, and the maximum
-   value of pb is 4.  */
-#define LZMA_POS_STATES (16)
-
-/* Number of LZMA distance states.  These are used match distances
-   with a short match length: up to 4 bytes.  */
-#define LZMA_DIST_STATES (4)
-
-/* Number of LZMA distance slots.  LZMA uses six bits to encode larger
-   match lengths, so 1 << 6 possible probabilities.  */
-#define LZMA_DIST_SLOTS (64)
-
-/* LZMA distances 0 to 3 are encoded directly, larger values use a
-   probability model.  */
-#define LZMA_DIST_MODEL_START (4)
-
-/* The LZMA probability model ends at 14.  */
-#define LZMA_DIST_MODEL_END (14)
-
-/* LZMA distance slots for distances less than 127.  */
-#define LZMA_FULL_DISTANCES (128)
-
-/* LZMA uses four alignment bits.  */
-#define LZMA_ALIGN_SIZE (16)
-
-/* LZMA match length is encoded with 4, 5, or 10 bits, some of which
-   are already known.  */
-#define LZMA_LEN_LOW_SYMBOLS (8)
-#define LZMA_LEN_MID_SYMBOLS (8)
-#define LZMA_LEN_HIGH_SYMBOLS (256)
-
-/* LZMA literal encoding.  */
-#define LZMA_LITERAL_CODERS_MAX (16)
-#define LZMA_LITERAL_CODER_SIZE (0x300)
-
-/* LZMA is based on a large set of probabilities, each managed
-   independently.  Each probability is an 11 bit number that we store
-   in a uint16_t.  We use a single large array of probabilities.  */
-
-/* Lengths of entries in the LZMA probabilities array.  The names used
-   here are copied from the Linux kernel implementation.  */
-
-#define LZMA_PROB_IS_MATCH_LEN (LZMA_STATES * LZMA_POS_STATES)
-#define LZMA_PROB_IS_REP_LEN LZMA_STATES
-#define LZMA_PROB_IS_REP0_LEN LZMA_STATES
-#define LZMA_PROB_IS_REP1_LEN LZMA_STATES
-#define LZMA_PROB_IS_REP2_LEN LZMA_STATES
-#define LZMA_PROB_IS_REP0_LONG_LEN (LZMA_STATES * LZMA_POS_STATES)
-#define LZMA_PROB_DIST_SLOT_LEN (LZMA_DIST_STATES * LZMA_DIST_SLOTS)
-#define LZMA_PROB_DIST_SPECIAL_LEN (LZMA_FULL_DISTANCES - LZMA_DIST_MODEL_END)
-#define LZMA_PROB_DIST_ALIGN_LEN LZMA_ALIGN_SIZE
-#define LZMA_PROB_MATCH_LEN_CHOICE_LEN 1
-#define LZMA_PROB_MATCH_LEN_CHOICE2_LEN 1
-#define LZMA_PROB_MATCH_LEN_LOW_LEN (LZMA_POS_STATES * LZMA_LEN_LOW_SYMBOLS)
-#define LZMA_PROB_MATCH_LEN_MID_LEN (LZMA_POS_STATES * LZMA_LEN_MID_SYMBOLS)
-#define LZMA_PROB_MATCH_LEN_HIGH_LEN LZMA_LEN_HIGH_SYMBOLS
-#define LZMA_PROB_REP_LEN_CHOICE_LEN 1
-#define LZMA_PROB_REP_LEN_CHOICE2_LEN 1
-#define LZMA_PROB_REP_LEN_LOW_LEN (LZMA_POS_STATES * LZMA_LEN_LOW_SYMBOLS)
-#define LZMA_PROB_REP_LEN_MID_LEN (LZMA_POS_STATES * LZMA_LEN_MID_SYMBOLS)
-#define LZMA_PROB_REP_LEN_HIGH_LEN LZMA_LEN_HIGH_SYMBOLS
-#define LZMA_PROB_LITERAL_LEN \
-  (LZMA_LITERAL_CODERS_MAX * LZMA_LITERAL_CODER_SIZE)
-
-/* Offsets into the LZMA probabilities array.  This is mechanically
-   generated from the above lengths.  */
-
-#define LZMA_PROB_IS_MATCH_OFFSET 0
-#define LZMA_PROB_IS_REP_OFFSET \
-  (LZMA_PROB_IS_MATCH_OFFSET + LZMA_PROB_IS_MATCH_LEN)
-#define LZMA_PROB_IS_REP0_OFFSET \
-  (LZMA_PROB_IS_REP_OFFSET + LZMA_PROB_IS_REP_LEN)
-#define LZMA_PROB_IS_REP1_OFFSET \
-  (LZMA_PROB_IS_REP0_OFFSET + LZMA_PROB_IS_REP0_LEN)
-#define LZMA_PROB_IS_REP2_OFFSET \
-  (LZMA_PROB_IS_REP1_OFFSET + LZMA_PROB_IS_REP1_LEN)
-#define LZMA_PROB_IS_REP0_LONG_OFFSET \
-  (LZMA_PROB_IS_REP2_OFFSET + LZMA_PROB_IS_REP2_LEN)
-#define LZMA_PROB_DIST_SLOT_OFFSET \
-  (LZMA_PROB_IS_REP0_LONG_OFFSET + LZMA_PROB_IS_REP0_LONG_LEN)
-#define LZMA_PROB_DIST_SPECIAL_OFFSET \
-  (LZMA_PROB_DIST_SLOT_OFFSET + LZMA_PROB_DIST_SLOT_LEN)
-#define LZMA_PROB_DIST_ALIGN_OFFSET \
-  (LZMA_PROB_DIST_SPECIAL_OFFSET + LZMA_PROB_DIST_SPECIAL_LEN)
-#define LZMA_PROB_MATCH_LEN_CHOICE_OFFSET \
-  (LZMA_PROB_DIST_ALIGN_OFFSET + LZMA_PROB_DIST_ALIGN_LEN)
-#define LZMA_PROB_MATCH_LEN_CHOICE2_OFFSET \
-  (LZMA_PROB_MATCH_LEN_CHOICE_OFFSET + LZMA_PROB_MATCH_LEN_CHOICE_LEN)
-#define LZMA_PROB_MATCH_LEN_LOW_OFFSET \
-  (LZMA_PROB_MATCH_LEN_CHOICE2_OFFSET + LZMA_PROB_MATCH_LEN_CHOICE2_LEN)
-#define LZMA_PROB_MATCH_LEN_MID_OFFSET \
-  (LZMA_PROB_MATCH_LEN_LOW_OFFSET + LZMA_PROB_MATCH_LEN_LOW_LEN)
-#define LZMA_PROB_MATCH_LEN_HIGH_OFFSET \
-  (LZMA_PROB_MATCH_LEN_MID_OFFSET + LZMA_PROB_MATCH_LEN_MID_LEN)
-#define LZMA_PROB_REP_LEN_CHOICE_OFFSET \
-  (LZMA_PROB_MATCH_LEN_HIGH_OFFSET + LZMA_PROB_MATCH_LEN_HIGH_LEN)
-#define LZMA_PROB_REP_LEN_CHOICE2_OFFSET \
-  (LZMA_PROB_REP_LEN_CHOICE_OFFSET + LZMA_PROB_REP_LEN_CHOICE_LEN)
-#define LZMA_PROB_REP_LEN_LOW_OFFSET \
-  (LZMA_PROB_REP_LEN_CHOICE2_OFFSET + LZMA_PROB_REP_LEN_CHOICE2_LEN)
-#define LZMA_PROB_REP_LEN_MID_OFFSET \
-  (LZMA_PROB_REP_LEN_LOW_OFFSET + LZMA_PROB_REP_LEN_LOW_LEN)
-#define LZMA_PROB_REP_LEN_HIGH_OFFSET \
-  (LZMA_PROB_REP_LEN_MID_OFFSET + LZMA_PROB_REP_LEN_MID_LEN)
-#define LZMA_PROB_LITERAL_OFFSET \
-  (LZMA_PROB_REP_LEN_HIGH_OFFSET + LZMA_PROB_REP_LEN_HIGH_LEN)
-
-#define LZMA_PROB_TOTAL_COUNT \
-  (LZMA_PROB_LITERAL_OFFSET + LZMA_PROB_LITERAL_LEN)
-
-/* Check that the number of LZMA probabilities is the same as the
-   Linux kernel implementation.  */
-
-#if LZMA_PROB_TOTAL_COUNT != 1846 + (1 << 4) * 0x300
- #error Wrong number of LZMA probabilities
-#endif
-
-/* Expressions for the offset in the LZMA probabilities array of a
-   specific probability.  */
-
-#define LZMA_IS_MATCH(state, pos) \
-  (LZMA_PROB_IS_MATCH_OFFSET + (state) * LZMA_POS_STATES + (pos))
-#define LZMA_IS_REP(state) \
-  (LZMA_PROB_IS_REP_OFFSET + (state))
-#define LZMA_IS_REP0(state) \
-  (LZMA_PROB_IS_REP0_OFFSET + (state))
-#define LZMA_IS_REP1(state) \
-  (LZMA_PROB_IS_REP1_OFFSET + (state))
-#define LZMA_IS_REP2(state) \
-  (LZMA_PROB_IS_REP2_OFFSET + (state))
-#define LZMA_IS_REP0_LONG(state, pos) \
-  (LZMA_PROB_IS_REP0_LONG_OFFSET + (state) * LZMA_POS_STATES + (pos))
-#define LZMA_DIST_SLOT(dist, slot) \
-  (LZMA_PROB_DIST_SLOT_OFFSET + (dist) * LZMA_DIST_SLOTS + (slot))
-#define LZMA_DIST_SPECIAL(dist) \
-  (LZMA_PROB_DIST_SPECIAL_OFFSET + (dist))
-#define LZMA_DIST_ALIGN(dist) \
-  (LZMA_PROB_DIST_ALIGN_OFFSET + (dist))
-#define LZMA_MATCH_LEN_CHOICE \
-  LZMA_PROB_MATCH_LEN_CHOICE_OFFSET
-#define LZMA_MATCH_LEN_CHOICE2 \
-  LZMA_PROB_MATCH_LEN_CHOICE2_OFFSET
-#define LZMA_MATCH_LEN_LOW(pos, sym) \
-  (LZMA_PROB_MATCH_LEN_LOW_OFFSET + (pos) * LZMA_LEN_LOW_SYMBOLS + (sym))
-#define LZMA_MATCH_LEN_MID(pos, sym) \
-  (LZMA_PROB_MATCH_LEN_MID_OFFSET + (pos) * LZMA_LEN_MID_SYMBOLS + (sym))
-#define LZMA_MATCH_LEN_HIGH(sym) \
-  (LZMA_PROB_MATCH_LEN_HIGH_OFFSET + (sym))
-#define LZMA_REP_LEN_CHOICE \
-  LZMA_PROB_REP_LEN_CHOICE_OFFSET
-#define LZMA_REP_LEN_CHOICE2 \
-  LZMA_PROB_REP_LEN_CHOICE2_OFFSET
-#define LZMA_REP_LEN_LOW(pos, sym) \
-  (LZMA_PROB_REP_LEN_LOW_OFFSET + (pos) * LZMA_LEN_LOW_SYMBOLS + (sym))
-#define LZMA_REP_LEN_MID(pos, sym) \
-  (LZMA_PROB_REP_LEN_MID_OFFSET + (pos) * LZMA_LEN_MID_SYMBOLS + (sym))
-#define LZMA_REP_LEN_HIGH(sym) \
-  (LZMA_PROB_REP_LEN_HIGH_OFFSET + (sym))
-#define LZMA_LITERAL(code, size) \
-  (LZMA_PROB_LITERAL_OFFSET + (code) * LZMA_LITERAL_CODER_SIZE + (size))
-
-/* Read an LZMA varint from BUF, reading and updating *POFFSET,
-   setting *VAL.  Returns 0 on error, 1 on success.  */
-
-static int
-elf_lzma_varint (const unsigned char *compressed, size_t compressed_size,
-		 size_t *poffset, uint64_t *val)
-{
-  size_t off;
-  int i;
-  uint64_t v;
-  unsigned char b;
-
-  off = *poffset;
-  i = 0;
-  v = 0;
-  while (1)
-    {
-      if (unlikely (off >= compressed_size))
-	{
-	  elf_uncompress_failed ();
-	  return 0;
-	}
-      b = compressed[off];
-      v |= (b & 0x7f) << (i * 7);
-      ++off;
-      if ((b & 0x80) == 0)
-	{
-	  *poffset = off;
-	  *val = v;
-	  return 1;
-	}
-      ++i;
-      if (unlikely (i >= 9))
-	{
-	  elf_uncompress_failed ();
-	  return 0;
-	}
-    }
-}
-
-/* Normalize the LZMA range decoder, pulling in an extra input byte if
-   needed.  */
-
-static void
-elf_lzma_range_normalize (const unsigned char *compressed,
-			  size_t compressed_size, size_t *poffset,
-			  uint32_t *prange, uint32_t *pcode)
-{
-  if (*prange < (1U << 24))
-    {
-      if (unlikely (*poffset >= compressed_size))
-	{
-	  /* We assume this will be caught elsewhere.  */
-	  elf_uncompress_failed ();
-	  return;
-	}
-      *prange <<= 8;
-      *pcode <<= 8;
-      *pcode += compressed[*poffset];
-      ++*poffset;
-    }
-}
-
-/* Read and return a single bit from the LZMA stream, reading and
-   updating *PROB.  Each bit comes from the range coder.  */
-
-static int
-elf_lzma_bit (const unsigned char *compressed, size_t compressed_size,
-	      uint16_t *prob, size_t *poffset, uint32_t *prange,
-	      uint32_t *pcode)
-{
-  uint32_t bound;
-
-  elf_lzma_range_normalize (compressed, compressed_size, poffset,
-			    prange, pcode);
-  bound = (*prange >> 11) * (uint32_t) *prob;
-  if (*pcode < bound)
-    {
-      *prange = bound;
-      *prob += ((1U << 11) - *prob) >> 5;
-      return 0;
-    }
-  else
-    {
-      *prange -= bound;
-      *pcode -= bound;
-      *prob -= *prob >> 5;
-      return 1;
-    }
-}
-
-/* Read an integer of size BITS from the LZMA stream, most significant
-   bit first.  The bits are predicted using PROBS.  */
-
-static uint32_t
-elf_lzma_integer (const unsigned char *compressed, size_t compressed_size,
-		  uint16_t *probs, uint32_t bits, size_t *poffset,
-		  uint32_t *prange, uint32_t *pcode)
-{
-  uint32_t sym;
-  uint32_t i;
-
-  sym = 1;
-  for (i = 0; i < bits; i++)
-    {
-      int bit;
-
-      bit = elf_lzma_bit (compressed, compressed_size, probs + sym, poffset,
-			  prange, pcode);
-      sym <<= 1;
-      sym += bit;
-    }
-  return sym - (1 << bits);
-}
-
-/* Read an integer of size BITS from the LZMA stream, least
-   significant bit first.  The bits are predicted using PROBS.  */
-
-static uint32_t
-elf_lzma_reverse_integer (const unsigned char *compressed,
-			  size_t compressed_size, uint16_t *probs,
-			  uint32_t bits, size_t *poffset, uint32_t *prange,
-			  uint32_t *pcode)
-{
-  uint32_t sym;
-  uint32_t val;
-  uint32_t i;
-
-  sym = 1;
-  val = 0;
-  for (i = 0; i < bits; i++)
-    {
-      int bit;
-
-      bit = elf_lzma_bit (compressed, compressed_size, probs + sym, poffset,
-			  prange, pcode);
-      sym <<= 1;
-      sym += bit;
-      val += bit << i;
-    }
-  return val;
-}
-
-/* Read a length from the LZMA stream.  IS_REP picks either LZMA_MATCH
-   or LZMA_REP probabilities.  */
-
-static uint32_t
-elf_lzma_len (const unsigned char *compressed, size_t compressed_size,
-	      uint16_t *probs, int is_rep, unsigned int pos_state,
-	      size_t *poffset, uint32_t *prange, uint32_t *pcode)
-{
-  uint16_t *probs_choice;
-  uint16_t *probs_sym;
-  uint32_t bits;
-  uint32_t len;
-
-  probs_choice = probs + (is_rep
-			  ? LZMA_REP_LEN_CHOICE
-			  : LZMA_MATCH_LEN_CHOICE);
-  if (elf_lzma_bit (compressed, compressed_size, probs_choice, poffset,
-		    prange, pcode))
-    {
-      probs_choice = probs + (is_rep
-			      ? LZMA_REP_LEN_CHOICE2
-			      : LZMA_MATCH_LEN_CHOICE2);
-      if (elf_lzma_bit (compressed, compressed_size, probs_choice,
-			poffset, prange, pcode))
-	{
-	  probs_sym = probs + (is_rep
-			       ? LZMA_REP_LEN_HIGH (0)
-			       : LZMA_MATCH_LEN_HIGH (0));
-	  bits = 8;
-	  len = 2 + 8 + 8;
-	}
-      else
-	{
-	  probs_sym = probs + (is_rep
-			       ? LZMA_REP_LEN_MID (pos_state, 0)
-			       : LZMA_MATCH_LEN_MID (pos_state, 0));
-	  bits = 3;
-	  len = 2 + 8;
-	}
-    }
-  else
-    {
-      probs_sym = probs + (is_rep
-			   ? LZMA_REP_LEN_LOW (pos_state, 0)
-			   : LZMA_MATCH_LEN_LOW (pos_state, 0));
-      bits = 3;
-      len = 2;
-    }
-
-  len += elf_lzma_integer (compressed, compressed_size, probs_sym, bits,
-			   poffset, prange, pcode);
-  return len;
-}
-
-/* Uncompress one LZMA block from a minidebug file.  The compressed
-   data is at COMPRESSED + *POFFSET.  Update *POFFSET.  Store the data
-   into the memory at UNCOMPRESSED, size UNCOMPRESSED_SIZE.  CHECK is
-   the stream flag from the xz header.  Return 1 on successful
-   decompression.  */
-
-static int
-elf_uncompress_lzma_block (const unsigned char *compressed,
-			   size_t compressed_size, unsigned char check,
-			   uint16_t *probs, unsigned char *uncompressed,
-			   size_t uncompressed_size, size_t *poffset)
-{
-  size_t off;
-  size_t block_header_offset;
-  size_t block_header_size;
-  unsigned char block_flags;
-  uint64_t header_compressed_size;
-  uint64_t header_uncompressed_size;
-  unsigned char lzma2_properties;
-  uint32_t computed_crc;
-  uint32_t stream_crc;
-  size_t uncompressed_offset;
-  size_t dict_start_offset;
-  unsigned int lc;
-  unsigned int lp;
-  unsigned int pb;
-  uint32_t range;
-  uint32_t code;
-  uint32_t lstate;
-  uint32_t dist[4];
-
-  off = *poffset;
-  block_header_offset = off;
-
-  /* Block header size is a single byte.  */
-  if (unlikely (off >= compressed_size))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-  block_header_size = (compressed[off] + 1) * 4;
-  if (unlikely (off + block_header_size > compressed_size))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-
-  /* Block flags.  */
-  block_flags = compressed[off + 1];
-  if (unlikely ((block_flags & 0x3c) != 0))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-
-  off += 2;
-
-  /* Optional compressed size.  */
-  header_compressed_size = 0;
-  if ((block_flags & 0x40) != 0)
-    {
-      *poffset = off;
-      if (!elf_lzma_varint (compressed, compressed_size, poffset,
-			    &header_compressed_size))
-	return 0;
-      off = *poffset;
-    }
-
-  /* Optional uncompressed size.  */
-  header_uncompressed_size = 0;
-  if ((block_flags & 0x80) != 0)
-    {
-      *poffset = off;
-      if (!elf_lzma_varint (compressed, compressed_size, poffset,
-			    &header_uncompressed_size))
-	return 0;
-      off = *poffset;
-    }
-
-  /* The recipe for creating a minidebug file is to run the xz program
-     with no arguments, so we expect exactly one filter: lzma2.  */
-
-  if (unlikely ((block_flags & 0x3) != 0))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-
-  if (unlikely (off + 2 >= block_header_offset + block_header_size))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-
-  /* The filter ID for LZMA2 is 0x21.  */
-  if (unlikely (compressed[off] != 0x21))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-  ++off;
-
-  /* The size of the filter properties for LZMA2 is 1.  */
-  if (unlikely (compressed[off] != 1))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-  ++off;
-
-  lzma2_properties = compressed[off];
-  ++off;
-
-  if (unlikely (lzma2_properties > 40))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-
-  /* The properties describe the dictionary size, but we don't care
-     what that is.  */
-
-  /* Block header padding.  */
-  if (unlikely (off + 4 > compressed_size))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-
-  off = (off + 3) &~ (size_t) 3;
-
-  if (unlikely (off + 4 > compressed_size))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-
-  /* Block header CRC.  */
-  computed_crc = elf_crc32 (0, compressed + block_header_offset,
-			    block_header_size - 4);
-  stream_crc = (compressed[off]
-		| (compressed[off + 1] << 8)
-		| (compressed[off + 2] << 16)
-		| (compressed[off + 3] << 24));
-  if (unlikely (computed_crc != stream_crc))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-  off += 4;
-
-  /* Read a sequence of LZMA2 packets.  */
-
-  uncompressed_offset = 0;
-  dict_start_offset = 0;
-  lc = 0;
-  lp = 0;
-  pb = 0;
-  lstate = 0;
-  while (off < compressed_size)
-    {
-      unsigned char control;
-
-      range = 0xffffffff;
-      code = 0;
-
-      control = compressed[off];
-      ++off;
-      if (unlikely (control == 0))
-	{
-	  /* End of packets.  */
-	  break;
-	}
-
-      if (control == 1 || control >= 0xe0)
-	{
-	  /* Reset dictionary to empty.  */
-	  dict_start_offset = uncompressed_offset;
-	}
-
-      if (control < 0x80)
-	{
-	  size_t chunk_size;
-
-	  /* The only valid values here are 1 or 2.  A 1 means to
-	     reset the dictionary (done above).  Then we see an
-	     uncompressed chunk.  */
-
-	  if (unlikely (control > 2))
-	    {
-	      elf_uncompress_failed ();
-	      return 0;
-	    }
-
-	  /* An uncompressed chunk is a two byte size followed by
-	     data.  */
-
-	  if (unlikely (off + 2 > compressed_size))
-	    {
-	      elf_uncompress_failed ();
-	      return 0;
-	    }
-
-	  chunk_size = compressed[off] << 8;
-	  chunk_size += compressed[off + 1];
-	  ++chunk_size;
-
-	  off += 2;
-
-	  if (unlikely (off + chunk_size > compressed_size))
-	    {
-	      elf_uncompress_failed ();
-	      return 0;
-	    }
-	  if (unlikely (uncompressed_offset + chunk_size > uncompressed_size))
-	    {
-	      elf_uncompress_failed ();
-	      return 0;
-	    }
-
-	  memcpy (uncompressed + uncompressed_offset, compressed + off,
-		  chunk_size);
-	  uncompressed_offset += chunk_size;
-	  off += chunk_size;
-	}
-      else
-	{
-	  size_t uncompressed_chunk_start;
-	  size_t uncompressed_chunk_size;
-	  size_t compressed_chunk_size;
-	  size_t limit;
-
-	  /* An LZMA chunk.  This starts with an uncompressed size and
-	     a compressed size.  */
-
-	  if (unlikely (off + 4 >= compressed_size))
-	    {
-	      elf_uncompress_failed ();
-	      return 0;
-	    }
-
-	  uncompressed_chunk_start = uncompressed_offset;
-
-	  uncompressed_chunk_size = (control & 0x1f) << 16;
-	  uncompressed_chunk_size += compressed[off] << 8;
-	  uncompressed_chunk_size += compressed[off + 1];
-	  ++uncompressed_chunk_size;
-
-	  compressed_chunk_size = compressed[off + 2] << 8;
-	  compressed_chunk_size += compressed[off + 3];
-	  ++compressed_chunk_size;
-
-	  off += 4;
-
-	  /* Bit 7 (0x80) is set.
-	     Bits 6 and 5 (0x40 and 0x20) are as follows:
-	     0: don't reset anything
-	     1: reset state
-	     2: reset state, read properties
-	     3: reset state, read properties, reset dictionary (done above) */
-
-	  if (control >= 0xc0)
-	    {
-	      unsigned char props;
-
-	      /* Bit 6 is set, read properties.  */
-
-	      if (unlikely (off >= compressed_size))
-		{
-		  elf_uncompress_failed ();
-		  return 0;
-		}
-	      props = compressed[off];
-	      ++off;
-	      if (unlikely (props > (4 * 5 + 4) * 9 + 8))
-		{
-		  elf_uncompress_failed ();
-		  return 0;
-		}
-	      pb = 0;
-	      while (props >= 9 * 5)
-		{
-		  props -= 9 * 5;
-		  ++pb;
-		}
-	      lp = 0;
-	      while (props > 9)
-		{
-		  props -= 9;
-		  ++lp;
-		}
-	      lc = props;
-	      if (unlikely (lc + lp > 4))
-		{
-		  elf_uncompress_failed ();
-		  return 0;
-		}
-	    }
-
-	  if (control >= 0xa0)
-	    {
-	      size_t i;
-
-	      /* Bit 5 or 6 is set, reset LZMA state.  */
-
-	      lstate = 0;
-	      memset (&dist, 0, sizeof dist);
-	      for (i = 0; i < LZMA_PROB_TOTAL_COUNT; i++)
-		probs[i] = 1 << 10;
-	      range = 0xffffffff;
-	      code = 0;
-	    }
-
-	  /* Read the range code.  */
-
-	  if (unlikely (off + 5 > compressed_size))
-	    {
-	      elf_uncompress_failed ();
-	      return 0;
-	    }
-
-	  /* The byte at compressed[off] is ignored for some
-	     reason.  */
-
-	  code = ((compressed[off + 1] << 24)
-		  + (compressed[off + 2] << 16)
-		  + (compressed[off + 3] << 8)
-		  + compressed[off + 4]);
-	  off += 5;
-
-	  /* This is the main LZMA decode loop.  */
-
-	  limit = off + compressed_chunk_size;
-	  *poffset = off;
-	  while (*poffset < limit)
-	    {
-	      unsigned int pos_state;
-
-	      if (unlikely (uncompressed_offset
-			    == (uncompressed_chunk_start
-				+ uncompressed_chunk_size)))
-		{
-		  /* We've decompressed all the expected bytes.  */
-		  break;
-		}
-
-	      pos_state = ((uncompressed_offset - dict_start_offset)
-			   & ((1 << pb) - 1));
-
-	      if (elf_lzma_bit (compressed, compressed_size,
-				probs + LZMA_IS_MATCH (lstate, pos_state),
-				poffset, &range, &code))
-		{
-		  uint32_t len;
-
-		  if (elf_lzma_bit (compressed, compressed_size,
-				    probs + LZMA_IS_REP (lstate),
-				    poffset, &range, &code))
-		    {
-		      int short_rep;
-		      uint32_t next_dist;
-
-		      /* Repeated match.  */
-
-		      short_rep = 0;
-		      if (elf_lzma_bit (compressed, compressed_size,
-					probs + LZMA_IS_REP0 (lstate),
-					poffset, &range, &code))
-			{
-			  if (elf_lzma_bit (compressed, compressed_size,
-					    probs + LZMA_IS_REP1 (lstate),
-					    poffset, &range, &code))
-			    {
-			      if (elf_lzma_bit (compressed, compressed_size,
-						probs + LZMA_IS_REP2 (lstate),
-						poffset, &range, &code))
-				{
-				  next_dist = dist[3];
-				  dist[3] = dist[2];
-				}
-			      else
-				{
-				  next_dist = dist[2];
-				}
-			      dist[2] = dist[1];
-			    }
-			  else
-			    {
-			      next_dist = dist[1];
-			    }
-
-			  dist[1] = dist[0];
-			  dist[0] = next_dist;
-			}
-		      else
-			{
-			  if (!elf_lzma_bit (compressed, compressed_size,
-					    (probs
-					     + LZMA_IS_REP0_LONG (lstate,
-								  pos_state)),
-					    poffset, &range, &code))
-			    short_rep = 1;
-			}
-
-		      if (lstate < 7)
-			lstate = short_rep ? 9 : 8;
-		      else
-			lstate = 11;
-
-		      if (short_rep)
-			len = 1;
-		      else
-			len = elf_lzma_len (compressed, compressed_size,
-					    probs, 1, pos_state, poffset,
-					    &range, &code);
-		    }
-		  else
-		    {
-		      uint32_t dist_state;
-		      uint32_t dist_slot;
-		      uint16_t *probs_dist;
-
-		      /* Match.  */
-
-		      if (lstate < 7)
-			lstate = 7;
-		      else
-			lstate = 10;
-		      dist[3] = dist[2];
-		      dist[2] = dist[1];
-		      dist[1] = dist[0];
-		      len = elf_lzma_len (compressed, compressed_size,
-					  probs, 0, pos_state, poffset,
-					  &range, &code);
-
-		      if (len < 4 + 2)
-			dist_state = len - 2;
-		      else
-			dist_state = 3;
-		      probs_dist = probs + LZMA_DIST_SLOT (dist_state, 0);
-		      dist_slot = elf_lzma_integer (compressed,
-						    compressed_size,
-						    probs_dist, 6,
-						    poffset, &range,
-						    &code);
-		      if (dist_slot < LZMA_DIST_MODEL_START)
-			dist[0] = dist_slot;
-		      else
-			{
-			  uint32_t limit;
-
-			  limit = (dist_slot >> 1) - 1;
-			  dist[0] = 2 + (dist_slot & 1);
-			  if (dist_slot < LZMA_DIST_MODEL_END)
-			    {
-			      dist[0] <<= limit;
-			      probs_dist = (probs
-					    + LZMA_DIST_SPECIAL(dist[0]
-								- dist_slot
-								- 1));
-			      dist[0] +=
-				elf_lzma_reverse_integer (compressed,
-							  compressed_size,
-							  probs_dist,
-							  limit, poffset,
-							  &range, &code);
-			    }
-			  else
-			    {
-			      uint32_t dist0;
-			      uint32_t i;
-
-			      dist0 = dist[0];
-			      for (i = 0; i < limit - 4; i++)
-				{
-				  uint32_t mask;
-
-				  elf_lzma_range_normalize (compressed,
-							    compressed_size,
-							    poffset,
-							    &range, &code);
-				  range >>= 1;
-				  code -= range;
-				  mask = -(code >> 31);
-				  code += range & mask;
-				  dist0 <<= 1;
-				  dist0 += mask + 1;
-				}
-			      dist0 <<= 4;
-			      probs_dist = probs + LZMA_DIST_ALIGN (0);
-			      dist0 +=
-				elf_lzma_reverse_integer (compressed,
-							  compressed_size,
-							  probs_dist, 4,
-							  poffset,
-							  &range, &code);
-			      dist[0] = dist0;
-			    }
-			}
-		    }
-
-		  if (unlikely (uncompressed_offset
-				- dict_start_offset < dist[0] + 1))
-		    {
-		      elf_uncompress_failed ();
-		      return 0;
-		    }
-		  if (unlikely (uncompressed_offset + len > uncompressed_size))
-		    {
-		      elf_uncompress_failed ();
-		      return 0;
-		    }
-
-		  if (dist[0] == 0)
-		    {
-		      /* A common case, meaning repeat the last
-			 character LEN times.  */
-		      memset (uncompressed + uncompressed_offset,
-			      uncompressed[uncompressed_offset - 1],
-			      len);
-		      uncompressed_offset += len;
-		    }
-		  else if (dist[0] + 1 >= len)
-		    {
-		      memcpy (uncompressed + uncompressed_offset,
-			      uncompressed + uncompressed_offset - dist[0] - 1,
-			      len);
-		      uncompressed_offset += len;
-		    }
-		  else
-		    {
-		      while (len > 0)
-			{
-			  uint32_t copy;
-
-			  copy = len < dist[0] + 1 ? len : dist[0] + 1;
-			  memcpy (uncompressed + uncompressed_offset,
-				  (uncompressed + uncompressed_offset
-				   - dist[0] - 1),
-				  copy);
-			  len -= copy;
-			  uncompressed_offset += copy;
-			}
-		    }
-		}
-	      else
-		{
-		  unsigned char prev;
-		  unsigned char low;
-		  size_t high;
-		  uint16_t *lit_probs;
-		  unsigned int sym;
-
-		  /* Literal value.  */
-
-		  if (uncompressed_offset > 0)
-		    prev = uncompressed[uncompressed_offset - 1];
-		  else
-		    prev = 0;
-		  low = prev >> (8 - lc);
-		  high = (((uncompressed_offset - dict_start_offset)
-			   & ((1 << lp) - 1))
-			  << lc);
-		  lit_probs = probs + LZMA_LITERAL (low + high, 0);
-		  if (lstate < 7)
-		    sym = elf_lzma_integer (compressed, compressed_size,
-					    lit_probs, 8, poffset, &range,
-					    &code);
-		  else
-		    {
-		      unsigned int match;
-		      unsigned int bit;
-		      unsigned int match_bit;
-		      unsigned int idx;
-
-		      sym = 1;
-		      if (uncompressed_offset >= dist[0] + 1)
-			match = uncompressed[uncompressed_offset - dist[0] - 1];
-		      else
-			match = 0;
-		      match <<= 1;
-		      bit = 0x100;
-		      do
-			{
-			  match_bit = match & bit;
-			  match <<= 1;
-			  idx = bit + match_bit + sym;
-			  sym <<= 1;
-			  if (elf_lzma_bit (compressed, compressed_size,
-					    lit_probs + idx, poffset,
-					    &range, &code))
-			    {
-			      ++sym;
-			      bit &= match_bit;
-			    }
-			  else
-			    {
-			      bit &= ~ match_bit;
-			    }
-			}
-		      while (sym < 0x100);
-		    }
-
-		  if (unlikely (uncompressed_offset >= uncompressed_size))
-		    {
-		      elf_uncompress_failed ();
-		      return 0;
-		    }
-
-		  uncompressed[uncompressed_offset] = (unsigned char) sym;
-		  ++uncompressed_offset;
-		  if (lstate <= 3)
-		    lstate = 0;
-		  else if (lstate <= 9)
-		    lstate -= 3;
-		  else
-		    lstate -= 6;
-		}
-	    }
-
-	  elf_lzma_range_normalize (compressed, compressed_size, poffset,
-				    &range, &code);
-
-	  off = *poffset;
-	}
-    }
-
-  /* We have reached the end of the block.  Pad to four byte
-     boundary.  */
-  off = (off + 3) &~ (size_t) 3;
-  if (unlikely (off > compressed_size))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-
-  switch (check)
-    {
-    case 0:
-      /* No check.  */
-      break;
-
-    case 1:
-      /* CRC32 */
-      if (unlikely (off + 4 > compressed_size))
-	{
-	  elf_uncompress_failed ();
-	  return 0;
-	}
-      computed_crc = elf_crc32 (0, uncompressed, uncompressed_offset);
-      stream_crc = (compressed[off]
-		    | (compressed[off + 1] << 8)
-		    | (compressed[off + 2] << 16)
-		    | (compressed[off + 3] << 24));
-      if (computed_crc != stream_crc)
-	{
-	  elf_uncompress_failed ();
-	  return 0;
-	}
-      off += 4;
-      break;
-
-    case 4:
-      /* CRC64.  We don't bother computing a CRC64 checksum.  */
-      if (unlikely (off + 8 > compressed_size))
-	{
-	  elf_uncompress_failed ();
-	  return 0;
-	}
-      off += 8;
-      break;
-
-    case 10:
-      /* SHA.  We don't bother computing a SHA checksum.  */
-      if (unlikely (off + 32 > compressed_size))
-	{
-	  elf_uncompress_failed ();
-	  return 0;
-	}
-      off += 32;
-      break;
-
-    default:
-      elf_uncompress_failed ();
-      return 0;
-    }
-
-  *poffset = off;
-
-  return 1;
-}
-
-/* Uncompress LZMA data found in a minidebug file.  The minidebug
-   format is described at
-   https://sourceware.org/gdb/current/onlinedocs/gdb/MiniDebugInfo.html.
-   Returns 0 on error, 1 on successful decompression.  For this
-   function we return 0 on failure to decompress, as the calling code
-   will carry on in that case.  */
-
-static int
-elf_uncompress_lzma (struct backtrace_state *state,
-		     const unsigned char *compressed, size_t compressed_size,
-		     backtrace_error_callback error_callback, void *data,
-		     unsigned char **uncompressed, size_t *uncompressed_size)
-{
-  size_t header_size;
-  size_t footer_size;
-  unsigned char check;
-  uint32_t computed_crc;
-  uint32_t stream_crc;
-  size_t offset;
-  size_t index_size;
-  size_t footer_offset;
-  size_t index_offset;
-  uint64_t index_compressed_size;
-  uint64_t index_uncompressed_size;
-  unsigned char *mem;
-  uint16_t *probs;
-  size_t compressed_block_size;
-
-  /* The format starts with a stream header and ends with a stream
-     footer.  */
-  header_size = 12;
-  footer_size = 12;
-  if (unlikely (compressed_size < header_size + footer_size))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-
-  /* The stream header starts with a magic string.  */
-  if (unlikely (memcmp (compressed, "\375" "7zXZ\0", 6) != 0))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-
-  /* Next come stream flags.  The first byte is zero, the second byte
-     is the check.  */
-  if (unlikely (compressed[6] != 0))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-  check = compressed[7];
-  if (unlikely ((check & 0xf8) != 0))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-
-  /* Next comes a CRC of the stream flags.  */
-  computed_crc = elf_crc32 (0, compressed + 6, 2);
-  stream_crc = (compressed[8]
-		| (compressed[9] << 8)
-		| (compressed[10] << 16)
-		| (compressed[11] << 24));
-  if (unlikely (computed_crc != stream_crc))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-
-  /* Now that we've parsed the header, parse the footer, so that we
-     can get the uncompressed size.  */
-
-  /* The footer ends with two magic bytes.  */
-
-  offset = compressed_size;
-  if (unlikely (memcmp (compressed + offset - 2, "YZ", 2) != 0))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-  offset -= 2;
-
-  /* Before that are the stream flags, which should be the same as the
-     flags in the header.  */
-  if (unlikely (compressed[offset - 2] != 0
-		|| compressed[offset - 1] != check))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-  offset -= 2;
-
-  /* Before that is the size of the index field, which precedes the
-     footer.  */
-  index_size = (compressed[offset - 4]
-		| (compressed[offset - 3] << 8)
-		| (compressed[offset - 2] << 16)
-		| (compressed[offset - 1] << 24));
-  index_size = (index_size + 1) * 4;
-  offset -= 4;
-
-  /* Before that is a footer CRC.  */
-  computed_crc = elf_crc32 (0, compressed + offset, 6);
-  stream_crc = (compressed[offset - 4]
-		| (compressed[offset - 3] << 8)
-		| (compressed[offset - 2] << 16)
-		| (compressed[offset - 1] << 24));
-  if (unlikely (computed_crc != stream_crc))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-  offset -= 4;
-
-  /* The index comes just before the footer.  */
-  if (unlikely (offset < index_size + header_size))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-
-  footer_offset = offset;
-  offset -= index_size;
-  index_offset = offset;
-
-  /* The index starts with a zero byte.  */
-  if (unlikely (compressed[offset] != 0))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-  ++offset;
-
-  /* Next is the number of blocks.  We expect zero blocks for an empty
-     stream, and otherwise a single block.  */
-  if (unlikely (compressed[offset] == 0))
-    {
-      *uncompressed = NULL;
-      *uncompressed_size = 0;
-      return 1;
-    }
-  if (unlikely (compressed[offset] != 1))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-  ++offset;
-
-  /* Next is the compressed size and the uncompressed size.  */
-  if (!elf_lzma_varint (compressed, compressed_size, &offset,
-			&index_compressed_size))
-    return 0;
-  if (!elf_lzma_varint (compressed, compressed_size, &offset,
-			&index_uncompressed_size))
-    return 0;
-
-  /* Pad to a four byte boundary.  */
-  offset = (offset + 3) &~ (size_t) 3;
-
-  /* Next is a CRC of the index.  */
-  computed_crc = elf_crc32 (0, compressed + index_offset,
-			    offset - index_offset);
-  stream_crc = (compressed[offset]
-		| (compressed[offset + 1] << 8)
-		| (compressed[offset + 2] << 16)
-		| (compressed[offset + 3] << 24));
-  if (unlikely (computed_crc != stream_crc))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-  offset += 4;
-
-  /* We should now be back at the footer.  */
-  if (unlikely (offset != footer_offset))
-    {
-      elf_uncompress_failed ();
-      return 0;
-    }
-
-  /* Allocate space to hold the uncompressed data.  If we succeed in
-     uncompressing the LZMA data, we never free this memory.  */
-  mem = (unsigned char *) backtrace_alloc (state, index_uncompressed_size,
-					   error_callback, data);
-  if (unlikely (mem == NULL))
-    return 0;
-  *uncompressed = mem;
-  *uncompressed_size = index_uncompressed_size;
-
-  /* Allocate space for probabilities.  */
-  probs = ((uint16_t *)
-	   backtrace_alloc (state,
-			    LZMA_PROB_TOTAL_COUNT * sizeof (uint16_t),
-			    error_callback, data));
-  if (unlikely (probs == NULL))
-    {
-      backtrace_free (state, mem, index_uncompressed_size, error_callback,
-		      data);
-      return 0;
-    }
-
-  /* Uncompress the block, which follows the header.  */
-  offset = 12;
-  if (!elf_uncompress_lzma_block (compressed, compressed_size, check, probs,
-				  mem, index_uncompressed_size, &offset))
-    {
-      backtrace_free (state, mem, index_uncompressed_size, error_callback,
-		      data);
-      return 0;
-    }
-
-  compressed_block_size = offset - 12;
-  if (unlikely (compressed_block_size
-		!= ((index_compressed_size + 3) &~ (size_t) 3)))
-    {
-      elf_uncompress_failed ();
-      backtrace_free (state, mem, index_uncompressed_size, error_callback,
-		      data);
-      return 0;
-    }
-
-  offset = (offset + 3) &~ (size_t) 3;
-  if (unlikely (offset != index_offset))
-    {
-      elf_uncompress_failed ();
-      backtrace_free (state, mem, index_uncompressed_size, error_callback,
-		      data);
-      return 0;
-    }
-
-  return 1;
-}
-
-/* This function is a hook for testing the LZMA support.  It is only
-   used by tests.  */
-
-int
-backtrace_uncompress_lzma (struct backtrace_state *state,
-			   const unsigned char *compressed,
-			   size_t compressed_size,
-			   backtrace_error_callback error_callback,
-			   void *data, unsigned char **uncompressed,
-			   size_t *uncompressed_size)
-{
-  return elf_uncompress_lzma (state, compressed, compressed_size,
-			      error_callback, data, uncompressed,
-			      uncompressed_size);
-}
-
-/* Add the backtrace data for one ELF file.  Returns 1 on success,
-   0 on failure (in both cases descriptor is closed) or -1 if exe
-   is non-zero and the ELF file is ET_DYN, which tells the caller that
-   elf_add will need to be called on the descriptor again after
-   base_address is determined.  */
-
-static int
-elf_add (struct backtrace_state *state, const char *filename, int descriptor,
-	 const unsigned char *memory, size_t memory_size,
-	 uintptr_t base_address, backtrace_error_callback error_callback,
-	 void *data, fileline *fileline_fn, int *found_sym, int *found_dwarf,
-	 struct dwarf_data **fileline_entry, int exe, int debuginfo,
-	 const char *with_buildid_data, uint32_t with_buildid_size)
-{
-  struct elf_view ehdr_view;
-  b_elf_ehdr ehdr;
-  off_t shoff;
-  unsigned int shnum;
-  unsigned int shstrndx;
-  struct elf_view shdrs_view;
-  int shdrs_view_valid;
-  const b_elf_shdr *shdrs;
-  const b_elf_shdr *shstrhdr;
-  size_t shstr_size;
-  off_t shstr_off;
-  struct elf_view names_view;
-  int names_view_valid;
-  const char *names;
-  unsigned int symtab_shndx;
-  unsigned int dynsym_shndx;
-  unsigned int i;
-  struct debug_section_info sections[DEBUG_MAX];
-  struct debug_section_info zsections[DEBUG_MAX];
-  struct elf_view symtab_view;
-  int symtab_view_valid;
-  struct elf_view strtab_view;
-  int strtab_view_valid;
-  struct elf_view buildid_view;
-  int buildid_view_valid;
-  const char *buildid_data;
-  uint32_t buildid_size;
-  struct elf_view debuglink_view;
-  int debuglink_view_valid;
-  const char *debuglink_name;
-  uint32_t debuglink_crc;
-  struct elf_view debugaltlink_view;
-  int debugaltlink_view_valid;
-  const char *debugaltlink_name;
-  const char *debugaltlink_buildid_data;
-  uint32_t debugaltlink_buildid_size;
-  struct elf_view gnu_debugdata_view;
-  int gnu_debugdata_view_valid;
-  size_t gnu_debugdata_size;
-  unsigned char *gnu_debugdata_uncompressed;
-  size_t gnu_debugdata_uncompressed_size;
-  off_t min_offset;
-  off_t max_offset;
-  off_t debug_size;
-  struct elf_view debug_view;
-  int debug_view_valid;
-  unsigned int using_debug_view;
-  uint16_t *zdebug_table;
-  struct elf_view split_debug_view[DEBUG_MAX];
-  unsigned char split_debug_view_valid[DEBUG_MAX];
-  struct elf_ppc64_opd_data opd_data, *opd;
-  struct dwarf_sections dwarf_sections;
-
-  if (!debuginfo)
-    {
-      *found_sym = 0;
-      *found_dwarf = 0;
-    }
-
-  shdrs_view_valid = 0;
-  names_view_valid = 0;
-  symtab_view_valid = 0;
-  strtab_view_valid = 0;
-  buildid_view_valid = 0;
-  buildid_data = NULL;
-  buildid_size = 0;
-  debuglink_view_valid = 0;
-  debuglink_name = NULL;
-  debuglink_crc = 0;
-  debugaltlink_view_valid = 0;
-  debugaltlink_name = NULL;
-  debugaltlink_buildid_data = NULL;
-  debugaltlink_buildid_size = 0;
-  gnu_debugdata_view_valid = 0;
-  gnu_debugdata_size = 0;
-  debug_view_valid = 0;
-  memset (&split_debug_view_valid[0], 0, sizeof split_debug_view_valid);
-  opd = NULL;
-
-  if (!elf_get_view (state, descriptor, memory, memory_size, 0, sizeof ehdr,
-		     error_callback, data, &ehdr_view))
-    goto fail;
-
-  memcpy (&ehdr, ehdr_view.view.data, sizeof ehdr);
-
-  elf_release_view (state, &ehdr_view, error_callback, data);
-
-  if (ehdr.e_ident[EI_MAG0] != ELFMAG0
-      || ehdr.e_ident[EI_MAG1] != ELFMAG1
-      || ehdr.e_ident[EI_MAG2] != ELFMAG2
-      || ehdr.e_ident[EI_MAG3] != ELFMAG3)
-    {
-      error_callback (data, "executable file is not ELF", 0);
-      goto fail;
-    }
-  if (ehdr.e_ident[EI_VERSION] != EV_CURRENT)
-    {
-      error_callback (data, "executable file is unrecognized ELF version", 0);
-      goto fail;
-    }
-
-#if BACKTRACE_ELF_SIZE == 32
-#define BACKTRACE_ELFCLASS ELFCLASS32
-#else
-#define BACKTRACE_ELFCLASS ELFCLASS64
-#endif
-
-  if (ehdr.e_ident[EI_CLASS] != BACKTRACE_ELFCLASS)
-    {
-      error_callback (data, "executable file is unexpected ELF class", 0);
-      goto fail;
-    }
-
-  if (ehdr.e_ident[EI_DATA] != ELFDATA2LSB
-      && ehdr.e_ident[EI_DATA] != ELFDATA2MSB)
-    {
-      error_callback (data, "executable file has unknown endianness", 0);
-      goto fail;
-    }
-
-  /* If the executable is ET_DYN, it is either a PIE, or we are running
-     directly a shared library with .interp.  We need to wait for
-     dl_iterate_phdr in that case to determine the actual base_address.  */
-  if (exe && ehdr.e_type == ET_DYN)
-    return -1;
-
-  shoff = ehdr.e_shoff;
-  shnum = ehdr.e_shnum;
-  shstrndx = ehdr.e_shstrndx;
-
-  if ((shnum == 0 || shstrndx == SHN_XINDEX)
-      && shoff != 0)
-    {
-      struct elf_view shdr_view;
-      const b_elf_shdr *shdr;
-
-      if (!elf_get_view (state, descriptor, memory, memory_size, shoff,
-			 sizeof shdr, error_callback, data, &shdr_view))
-	goto fail;
-
-      shdr = (const b_elf_shdr *) shdr_view.view.data;
-
-      if (shnum == 0)
-	shnum = shdr->sh_size;
-
-      if (shstrndx == SHN_XINDEX)
-	{
-	  shstrndx = shdr->sh_link;
-
-	  /* Versions of the GNU binutils between 2.12 and 2.18 did
-	     not handle objects with more than SHN_LORESERVE sections
-	     correctly.  All large section indexes were offset by
-	     0x100.  There is more information at
-	     http://sourceware.org/bugzilla/show_bug.cgi?id-5900 .
-	     Fortunately these object files are easy to detect, as the
-	     GNU binutils always put the section header string table
-	     near the end of the list of sections.  Thus if the
-	     section header string table index is larger than the
-	     number of sections, then we know we have to subtract
-	     0x100 to get the real section index.  */
-	  if (shstrndx >= shnum && shstrndx >= SHN_LORESERVE + 0x100)
-	    shstrndx -= 0x100;
-	}
-
-      elf_release_view (state, &shdr_view, error_callback, data);
-    }
-
-  if (shnum == 0 || shstrndx == 0)
-    goto fail;
-
-  /* To translate PC to file/line when using DWARF, we need to find
-     the .debug_info and .debug_line sections.  */
-
-  /* Read the section headers, skipping the first one.  */
-
-  if (!elf_get_view (state, descriptor, memory, memory_size,
-		     shoff + sizeof (b_elf_shdr),
-		     (shnum - 1) * sizeof (b_elf_shdr),
-		     error_callback, data, &shdrs_view))
-    goto fail;
-  shdrs_view_valid = 1;
-  shdrs = (const b_elf_shdr *) shdrs_view.view.data;
-
-  /* Read the section names.  */
-
-  shstrhdr = &shdrs[shstrndx - 1];
-  shstr_size = shstrhdr->sh_size;
-  shstr_off = shstrhdr->sh_offset;
-
-  if (!elf_get_view (state, descriptor, memory, memory_size, shstr_off,
-		     shstrhdr->sh_size, error_callback, data, &names_view))
-    goto fail;
-  names_view_valid = 1;
-  names = (const char *) names_view.view.data;
-
-  symtab_shndx = 0;
-  dynsym_shndx = 0;
-
-  memset (sections, 0, sizeof sections);
-  memset (zsections, 0, sizeof zsections);
-
-  /* Look for the symbol table.  */
-  for (i = 1; i < shnum; ++i)
-    {
-      const b_elf_shdr *shdr;
-      unsigned int sh_name;
-      const char *name;
-      int j;
-
-      shdr = &shdrs[i - 1];
-
-      if (shdr->sh_type == SHT_SYMTAB)
-	symtab_shndx = i;
-      else if (shdr->sh_type == SHT_DYNSYM)
-	dynsym_shndx = i;
-
-      sh_name = shdr->sh_name;
-      if (sh_name >= shstr_size)
-	{
-	  error_callback (data, "ELF section name out of range", 0);
-	  goto fail;
-	}
-
-      name = names + sh_name;
-
-      for (j = 0; j < (int) DEBUG_MAX; ++j)
-	{
-	  if (strcmp (name, dwarf_section_names[j]) == 0)
-	    {
-	      sections[j].offset = shdr->sh_offset;
-	      sections[j].size = shdr->sh_size;
-	      sections[j].compressed = (shdr->sh_flags & SHF_COMPRESSED) != 0;
-	      break;
-	    }
-	}
-
-      if (name[0] == '.' && name[1] == 'z')
-	{
-	  for (j = 0; j < (int) DEBUG_MAX; ++j)
-	    {
-	      if (strcmp (name + 2, dwarf_section_names[j] + 1) == 0)
-		{
-		  zsections[j].offset = shdr->sh_offset;
-		  zsections[j].size = shdr->sh_size;
-		  break;
-		}
-	    }
-	}
-
-      /* Read the build ID if present.  This could check for any
-	 SHT_NOTE section with the right note name and type, but gdb
-	 looks for a specific section name.  */
-      if ((!debuginfo || with_buildid_data != NULL)
-	  && !buildid_view_valid
-	  && strcmp (name, ".note.gnu.build-id") == 0)
-	{
-	  const b_elf_note *note;
-
-	  if (!elf_get_view (state, descriptor, memory, memory_size,
-			     shdr->sh_offset, shdr->sh_size, error_callback,
-			     data, &buildid_view))
-	    goto fail;
-
-	  buildid_view_valid = 1;
-	  note = (const b_elf_note *) buildid_view.view.data;
-	  if (note->type == NT_GNU_BUILD_ID
-	      && note->namesz == 4
-	      && strncmp (note->name, "GNU", 4) == 0
-	      && shdr->sh_size <= 12 + ((note->namesz + 3) & ~ 3) + note->descsz)
-	    {
-	      buildid_data = &note->name[0] + ((note->namesz + 3) & ~ 3);
-	      buildid_size = note->descsz;
-	    }
-
-	  if (with_buildid_size != 0)
-	    {
-	      if (buildid_size != with_buildid_size)
-		goto fail;
-
-	      if (memcmp (buildid_data, with_buildid_data, buildid_size) != 0)
-		goto fail;
-	    }
-	}
-
-      /* Read the debuglink file if present.  */
-      if (!debuginfo
-	  && !debuglink_view_valid
-	  && strcmp (name, ".gnu_debuglink") == 0)
-	{
-	  const char *debuglink_data;
-	  size_t crc_offset;
-
-	  if (!elf_get_view (state, descriptor, memory, memory_size,
-			     shdr->sh_offset, shdr->sh_size, error_callback,
-			     data, &debuglink_view))
-	    goto fail;
-
-	  debuglink_view_valid = 1;
-	  debuglink_data = (const char *) debuglink_view.view.data;
-	  crc_offset = strnlen (debuglink_data, shdr->sh_size);
-	  crc_offset = (crc_offset + 3) & ~3;
-	  if (crc_offset + 4 <= shdr->sh_size)
-	    {
-	      debuglink_name = debuglink_data;
-	      debuglink_crc = *(const uint32_t*)(debuglink_data + crc_offset);
-	    }
-	}
-
-      if (!debugaltlink_view_valid
-	  && strcmp (name, ".gnu_debugaltlink") == 0)
-	{
-	  const char *debugaltlink_data;
-	  size_t debugaltlink_name_len;
-
-	  if (!elf_get_view (state, descriptor, memory, memory_size,
-			     shdr->sh_offset, shdr->sh_size, error_callback,
-			     data, &debugaltlink_view))
-	    goto fail;
-
-	  debugaltlink_view_valid = 1;
-	  debugaltlink_data = (const char *) debugaltlink_view.view.data;
-	  debugaltlink_name = debugaltlink_data;
-	  debugaltlink_name_len = strnlen (debugaltlink_data, shdr->sh_size);
-	  if (debugaltlink_name_len < shdr->sh_size)
-	    {
-	      /* Include terminating zero.  */
-	      debugaltlink_name_len += 1;
-
-	      debugaltlink_buildid_data
-		= debugaltlink_data + debugaltlink_name_len;
-	      debugaltlink_buildid_size = shdr->sh_size - debugaltlink_name_len;
-	    }
-	}
-
-      if (!gnu_debugdata_view_valid
-	  && strcmp (name, ".gnu_debugdata") == 0)
-	{
-	  if (!elf_get_view (state, descriptor, memory, memory_size,
-			     shdr->sh_offset, shdr->sh_size, error_callback,
-			     data, &gnu_debugdata_view))
-	    goto fail;
-
-	  gnu_debugdata_size = shdr->sh_size;
-	  gnu_debugdata_view_valid = 1;
-	}
-
-      /* Read the .opd section on PowerPC64 ELFv1.  */
-      if (ehdr.e_machine == EM_PPC64
-	  && (ehdr.e_flags & EF_PPC64_ABI) < 2
-	  && shdr->sh_type == SHT_PROGBITS
-	  && strcmp (name, ".opd") == 0)
-	{
-	  if (!elf_get_view (state, descriptor, memory, memory_size,
-			     shdr->sh_offset, shdr->sh_size, error_callback,
-			     data, &opd_data.view))
-	    goto fail;
-
-	  opd = &opd_data;
-	  opd->addr = shdr->sh_addr;
-	  opd->data = (const char *) opd_data.view.view.data;
-	  opd->size = shdr->sh_size;
-	}
-    }
-
-  if (symtab_shndx == 0)
-    symtab_shndx = dynsym_shndx;
-  if (symtab_shndx != 0 && !debuginfo)
-    {
-      const b_elf_shdr *symtab_shdr;
-      unsigned int strtab_shndx;
-      const b_elf_shdr *strtab_shdr;
-      struct elf_syminfo_data *sdata;
-
-      symtab_shdr = &shdrs[symtab_shndx - 1];
-      strtab_shndx = symtab_shdr->sh_link;
-      if (strtab_shndx >= shnum)
-	{
-	  error_callback (data,
-			  "ELF symbol table strtab link out of range", 0);
-	  goto fail;
-	}
-      strtab_shdr = &shdrs[strtab_shndx - 1];
-
-      if (!elf_get_view (state, descriptor, memory, memory_size,
-			 symtab_shdr->sh_offset, symtab_shdr->sh_size,
-			 error_callback, data, &symtab_view))
-	goto fail;
-      symtab_view_valid = 1;
-
-      if (!elf_get_view (state, descriptor, memory, memory_size,
-			 strtab_shdr->sh_offset, strtab_shdr->sh_size,
-			 error_callback, data, &strtab_view))
-	goto fail;
-      strtab_view_valid = 1;
-
-      sdata = ((struct elf_syminfo_data *)
-	       backtrace_alloc (state, sizeof *sdata, error_callback, data));
-      if (sdata == NULL)
-	goto fail;
-
-      if (!elf_initialize_syminfo (state, base_address,
-				   symtab_view.view.data, symtab_shdr->sh_size,
-				   strtab_view.view.data, strtab_shdr->sh_size,
-				   error_callback, data, sdata, opd))
-	{
-	  backtrace_free (state, sdata, sizeof *sdata, error_callback, data);
-	  goto fail;
-	}
-
-      /* We no longer need the symbol table, but we hold on to the
-	 string table permanently.  */
-      elf_release_view (state, &symtab_view, error_callback, data);
-      symtab_view_valid = 0;
-      strtab_view_valid = 0;
-
-      *found_sym = 1;
-
-      elf_add_syminfo_data (state, sdata);
-    }
-
-  elf_release_view (state, &shdrs_view, error_callback, data);
-  shdrs_view_valid = 0;
-  elf_release_view (state, &names_view, error_callback, data);
-  names_view_valid = 0;
-
-  /* If the debug info is in a separate file, read that one instead.  */
-
-  if (buildid_data != NULL)
-    {
-      int d;
-
-      d = elf_open_debugfile_by_buildid (state, buildid_data, buildid_size,
-					 error_callback, data);
-      if (d >= 0)
-	{
-	  int ret;
-
-	  elf_release_view (state, &buildid_view, error_callback, data);
-	  if (debuglink_view_valid)
-	    elf_release_view (state, &debuglink_view, error_callback, data);
-	  if (debugaltlink_view_valid)
-	    elf_release_view (state, &debugaltlink_view, error_callback, data);
-	  ret = elf_add (state, "", d, NULL, 0, base_address, error_callback,
-			 data, fileline_fn, found_sym, found_dwarf, NULL, 0,
-			 1, NULL, 0);
-	  if (ret < 0)
-	    backtrace_close (d, error_callback, data);
-	  else if (descriptor >= 0)
-	    backtrace_close (descriptor, error_callback, data);
-	  return ret;
-	}
-    }
-
-  if (buildid_view_valid)
-    {
-      elf_release_view (state, &buildid_view, error_callback, data);
-      buildid_view_valid = 0;
-    }
-
-  if (opd)
-    {
-      elf_release_view (state, &opd->view, error_callback, data);
-      opd = NULL;
-    }
-
-  if (debuglink_name != NULL)
-    {
-      int d;
-
-      d = elf_open_debugfile_by_debuglink (state, filename, debuglink_name,
-					   debuglink_crc, error_callback,
-					   data);
-      if (d >= 0)
-	{
-	  int ret;
-
-	  elf_release_view (state, &debuglink_view, error_callback, data);
-	  if (debugaltlink_view_valid)
-	    elf_release_view (state, &debugaltlink_view, error_callback, data);
-	  ret = elf_add (state, "", d, NULL, 0, base_address, error_callback,
-			 data, fileline_fn, found_sym, found_dwarf, NULL, 0,
-			 1, NULL, 0);
-	  if (ret < 0)
-	    backtrace_close (d, error_callback, data);
-	  else if (descriptor >= 0)
-	    backtrace_close(descriptor, error_callback, data);
-	  return ret;
-	}
-    }
-
-  if (debuglink_view_valid)
-    {
-      elf_release_view (state, &debuglink_view, error_callback, data);
-      debuglink_view_valid = 0;
-    }
-
-  struct dwarf_data *fileline_altlink = NULL;
-  if (debugaltlink_name != NULL)
-    {
-      int d;
-
-      d = elf_open_debugfile_by_debuglink (state, filename, debugaltlink_name,
-					   0, error_callback, data);
-      if (d >= 0)
-	{
-	  int ret;
-
-	  ret = elf_add (state, filename, d, NULL, 0, base_address,
-			 error_callback, data, fileline_fn, found_sym,
-			 found_dwarf, &fileline_altlink, 0, 1,
-			 debugaltlink_buildid_data, debugaltlink_buildid_size);
-	  elf_release_view (state, &debugaltlink_view, error_callback, data);
-	  debugaltlink_view_valid = 0;
-	  if (ret < 0)
-	    {
-	      backtrace_close (d, error_callback, data);
-	      return ret;
-	    }
-	}
-    }
-
-  if (debugaltlink_view_valid)
-    {
-      elf_release_view (state, &debugaltlink_view, error_callback, data);
-      debugaltlink_view_valid = 0;
-    }
-
-  if (gnu_debugdata_view_valid)
-    {
-      int ret;
-
-      ret = elf_uncompress_lzma (state,
-				 ((const unsigned char *)
-				  gnu_debugdata_view.view.data),
-				 gnu_debugdata_size, error_callback, data,
-				 &gnu_debugdata_uncompressed,
-				 &gnu_debugdata_uncompressed_size);
-
-      elf_release_view (state, &gnu_debugdata_view, error_callback, data);
-      gnu_debugdata_view_valid = 0;
-
-      if (ret)
-	{
-	  ret = elf_add (state, filename, -1, gnu_debugdata_uncompressed,
-			 gnu_debugdata_uncompressed_size, base_address,
-			 error_callback, data, fileline_fn, found_sym,
-			 found_dwarf, NULL, 0, 0, NULL, 0);
-	  if (ret >= 0 && descriptor >= 0)
-	    backtrace_close(descriptor, error_callback, data);
-	  return ret;
-	}
-    }
-
-  /* Read all the debug sections in a single view, since they are
-     probably adjacent in the file.  If any of sections are
-     uncompressed, we never release this view.  */
-
-  min_offset = 0;
-  max_offset = 0;
-  debug_size = 0;
-  for (i = 0; i < (int) DEBUG_MAX; ++i)
-    {
-      off_t end;
-
-      if (sections[i].size != 0)
-	{
-	  if (min_offset == 0 || sections[i].offset < min_offset)
-	    min_offset = sections[i].offset;
-	  end = sections[i].offset + sections[i].size;
-	  if (end > max_offset)
-	    max_offset = end;
-	  debug_size += sections[i].size;
-	}
-      if (zsections[i].size != 0)
-	{
-	  if (min_offset == 0 || zsections[i].offset < min_offset)
-	    min_offset = zsections[i].offset;
-	  end = zsections[i].offset + zsections[i].size;
-	  if (end > max_offset)
-	    max_offset = end;
-	  debug_size += zsections[i].size;
-	}
-    }
-  if (min_offset == 0 || max_offset == 0)
-    {
-      if (descriptor >= 0)
-	{
-	  if (!backtrace_close (descriptor, error_callback, data))
-	    goto fail;
-	}
-      return 1;
-    }
-
-  /* If the total debug section size is large, assume that there are
-     gaps between the sections, and read them individually.  */
-
-  if (max_offset - min_offset < 0x20000000
-      || max_offset - min_offset < debug_size + 0x10000)
-    {
-      if (!elf_get_view (state, descriptor, memory, memory_size, min_offset,
-			 max_offset - min_offset, error_callback, data,
-			 &debug_view))
-	goto fail;
-      debug_view_valid = 1;
-    }
-  else
-    {
-      memset (&split_debug_view[0], 0, sizeof split_debug_view);
-      for (i = 0; i < (int) DEBUG_MAX; ++i)
-	{
-	  struct debug_section_info *dsec;
-
-	  if (sections[i].size != 0)
-	    dsec = &sections[i];
-	  else if (zsections[i].size != 0)
-	    dsec = &zsections[i];
-	  else
-	    continue;
-
-	  if (!elf_get_view (state, descriptor, memory, memory_size,
-			     dsec->offset, dsec->size, error_callback, data,
-			     &split_debug_view[i]))
-	    goto fail;
-	  split_debug_view_valid[i] = 1;
-
-	  if (sections[i].size != 0)
-	    sections[i].data = ((const unsigned char *)
-				split_debug_view[i].view.data);
-	  else
-	    zsections[i].data = ((const unsigned char *)
-				 split_debug_view[i].view.data);
-	}
-    }
-
-  /* We've read all we need from the executable.  */
-  if (descriptor >= 0)
-    {
-      if (!backtrace_close (descriptor, error_callback, data))
-	goto fail;
-      descriptor = -1;
-    }
-
-  using_debug_view = 0;
-  if (debug_view_valid)
-    {
-      for (i = 0; i < (int) DEBUG_MAX; ++i)
-	{
-	  if (sections[i].size == 0)
-	    sections[i].data = NULL;
-	  else
-	    {
-	      sections[i].data = ((const unsigned char *) debug_view.view.data
-				  + (sections[i].offset - min_offset));
-	      ++using_debug_view;
-	    }
-
-	  if (zsections[i].size == 0)
-	    zsections[i].data = NULL;
-	  else
-	    zsections[i].data = ((const unsigned char *) debug_view.view.data
-				 + (zsections[i].offset - min_offset));
-	}
-    }
-
-  /* Uncompress the old format (--compress-debug-sections=zlib-gnu).  */
-
-  zdebug_table = NULL;
-  for (i = 0; i < (int) DEBUG_MAX; ++i)
-    {
-      if (sections[i].size == 0 && zsections[i].size > 0)
-	{
-	  unsigned char *uncompressed_data;
-	  size_t uncompressed_size;
-
-	  if (zdebug_table == NULL)
-	    {
-	      zdebug_table = ((uint16_t *)
-			      backtrace_alloc (state, ZDEBUG_TABLE_SIZE,
-					       error_callback, data));
-	      if (zdebug_table == NULL)
-		goto fail;
-	    }
-
-	  uncompressed_data = NULL;
-	  uncompressed_size = 0;
-	  if (!elf_uncompress_zdebug (state, zsections[i].data,
-				      zsections[i].size, zdebug_table,
-				      error_callback, data,
-				      &uncompressed_data, &uncompressed_size))
-	    goto fail;
-	  sections[i].data = uncompressed_data;
-	  sections[i].size = uncompressed_size;
-	  sections[i].compressed = 0;
-
-	  if (split_debug_view_valid[i])
-	    {
-	      elf_release_view (state, &split_debug_view[i],
-				error_callback, data);
-	      split_debug_view_valid[i] = 0;
-	    }
-	}
-    }
-
-  /* Uncompress the official ELF format
-     (--compress-debug-sections=zlib-gabi).  */
-  for (i = 0; i < (int) DEBUG_MAX; ++i)
-    {
-      unsigned char *uncompressed_data;
-      size_t uncompressed_size;
-
-      if (sections[i].size == 0 || !sections[i].compressed)
-	continue;
-
-      if (zdebug_table == NULL)
-	{
-	  zdebug_table = ((uint16_t *)
-			  backtrace_alloc (state, ZDEBUG_TABLE_SIZE,
-					   error_callback, data));
-	  if (zdebug_table == NULL)
-	    goto fail;
-	}
-
-      uncompressed_data = NULL;
-      uncompressed_size = 0;
-      if (!elf_uncompress_chdr (state, sections[i].data, sections[i].size,
-				zdebug_table, error_callback, data,
-				&uncompressed_data, &uncompressed_size))
-	goto fail;
-      sections[i].data = uncompressed_data;
-      sections[i].size = uncompressed_size;
-      sections[i].compressed = 0;
-
-      if (debug_view_valid)
-	--using_debug_view;
-      else if (split_debug_view_valid[i])
-	{
-	  elf_release_view (state, &split_debug_view[i], error_callback, data);
-	  split_debug_view_valid[i] = 0;
-	}
-    }
-
-  if (zdebug_table != NULL)
-    backtrace_free (state, zdebug_table, ZDEBUG_TABLE_SIZE,
-		    error_callback, data);
-
-  if (debug_view_valid && using_debug_view == 0)
-    {
-      elf_release_view (state, &debug_view, error_callback, data);
-      debug_view_valid = 0;
-    }
-
-  for (i = 0; i < (int) DEBUG_MAX; ++i)
-    {
-      dwarf_sections.data[i] = sections[i].data;
-      dwarf_sections.size[i] = sections[i].size;
-    }
-
-  if (!backtrace_dwarf_add (state, base_address, &dwarf_sections,
-			    ehdr.e_ident[EI_DATA] == ELFDATA2MSB,
-			    fileline_altlink,
-			    error_callback, data, fileline_fn,
-			    fileline_entry))
-    goto fail;
-
-  *found_dwarf = 1;
-
-  return 1;
-
- fail:
-  if (shdrs_view_valid)
-    elf_release_view (state, &shdrs_view, error_callback, data);
-  if (names_view_valid)
-    elf_release_view (state, &names_view, error_callback, data);
-  if (symtab_view_valid)
-    elf_release_view (state, &symtab_view, error_callback, data);
-  if (strtab_view_valid)
-    elf_release_view (state, &strtab_view, error_callback, data);
-  if (debuglink_view_valid)
-    elf_release_view (state, &debuglink_view, error_callback, data);
-  if (debugaltlink_view_valid)
-    elf_release_view (state, &debugaltlink_view, error_callback, data);
-  if (gnu_debugdata_view_valid)
-    elf_release_view (state, &gnu_debugdata_view, error_callback, data);
-  if (buildid_view_valid)
-    elf_release_view (state, &buildid_view, error_callback, data);
-  if (debug_view_valid)
-    elf_release_view (state, &debug_view, error_callback, data);
-  for (i = 0; i < (int) DEBUG_MAX; ++i)
-    {
-      if (split_debug_view_valid[i])
-	elf_release_view (state, &split_debug_view[i], error_callback, data);
-    }
-  if (opd)
-    elf_release_view (state, &opd->view, error_callback, data);
-  if (descriptor >= 0)
-    backtrace_close (descriptor, error_callback, data);
-  return 0;
-}
-
-/* Data passed to phdr_callback.  */
-
-struct phdr_data
-{
-  struct backtrace_state *state;
-  backtrace_error_callback error_callback;
-  void *data;
-  fileline *fileline_fn;
-  int *found_sym;
-  int *found_dwarf;
-  const char *exe_filename;
-  int exe_descriptor;
-};
-
-/* Callback passed to dl_iterate_phdr.  Load debug info from shared
-   libraries.  */
-
-static int
-#ifdef __i386__
-__attribute__ ((__force_align_arg_pointer__))
-#endif
-phdr_callback (struct dl_phdr_info *info, size_t size ATTRIBUTE_UNUSED,
-	       void *pdata)
-{
-  struct phdr_data *pd = (struct phdr_data *) pdata;
-  const char *filename;
-  int descriptor;
-  int does_not_exist;
-  fileline elf_fileline_fn;
-  int found_dwarf;
-
-  /* There is not much we can do if we don't have the module name,
-     unless executable is ET_DYN, where we expect the very first
-     phdr_callback to be for the PIE.  */
-  if (info->dlpi_name == NULL || info->dlpi_name[0] == '\0')
-    {
-      if (pd->exe_descriptor == -1)
-	return 0;
-      filename = pd->exe_filename;
-      descriptor = pd->exe_descriptor;
-      pd->exe_descriptor = -1;
-    }
-  else
-    {
-      if (pd->exe_descriptor != -1)
-	{
-	  backtrace_close (pd->exe_descriptor, pd->error_callback, pd->data);
-	  pd->exe_descriptor = -1;
-	}
-
-      filename = info->dlpi_name;
-      descriptor = backtrace_open (info->dlpi_name, pd->error_callback,
-				   pd->data, &does_not_exist);
-      if (descriptor < 0)
-	return 0;
-    }
-
-  if (elf_add (pd->state, filename, descriptor, NULL, 0, info->dlpi_addr,
-	       pd->error_callback, pd->data, &elf_fileline_fn, pd->found_sym,
-	       &found_dwarf, NULL, 0, 0, NULL, 0))
-    {
-      if (found_dwarf)
-	{
-	  *pd->found_dwarf = 1;
-	  *pd->fileline_fn = elf_fileline_fn;
-	}
-    }
-
-  return 0;
-}
-
-/* Initialize the backtrace data we need from an ELF executable.  At
-   the ELF level, all we need to do is find the debug info
-   sections.  */
-
-int
-backtrace_initialize (struct backtrace_state *state, const char *filename,
-		      int descriptor, backtrace_error_callback error_callback,
-		      void *data, fileline *fileline_fn)
-{
-  int ret;
-  int found_sym;
-  int found_dwarf;
-  fileline elf_fileline_fn = elf_nodebug;
-  struct phdr_data pd;
-
-  ret = elf_add (state, filename, descriptor, NULL, 0, 0, error_callback, data,
-		 &elf_fileline_fn, &found_sym, &found_dwarf, NULL, 1, 0, NULL,
-		 0);
-  if (!ret)
-    return 0;
-
-  pd.state = state;
-  pd.error_callback = error_callback;
-  pd.data = data;
-  pd.fileline_fn = &elf_fileline_fn;
-  pd.found_sym = &found_sym;
-  pd.found_dwarf = &found_dwarf;
-  pd.exe_filename = filename;
-  pd.exe_descriptor = ret < 0 ? descriptor : -1;
-
-  dl_iterate_phdr (phdr_callback, (void *) &pd);
-
-  if (!state->threaded)
-    {
-      if (found_sym)
-	state->syminfo_fn = elf_syminfo;
-      else if (state->syminfo_fn == NULL)
-	state->syminfo_fn = elf_nosyms;
-    }
-  else
-    {
-      if (found_sym)
-	backtrace_atomic_store_pointer (&state->syminfo_fn, elf_syminfo);
-      else
-	(void) __sync_bool_compare_and_swap (&state->syminfo_fn, NULL,
-					     elf_nosyms);
-    }
-
-  if (!state->threaded)
-    *fileline_fn = state->fileline_fn;
-  else
-    *fileline_fn = backtrace_atomic_load_pointer (&state->fileline_fn);
-
-  if (*fileline_fn == NULL || *fileline_fn == elf_nodebug)
-    *fileline_fn = elf_fileline_fn;
-
-  return 1;
-}
diff --git a/contrib/libs/backtrace/fileline.c b/contrib/libs/backtrace/fileline.c
deleted file mode 100644
index 0472f4721a..0000000000
--- a/contrib/libs/backtrace/fileline.c
+++ /dev/null
@@ -1,346 +0,0 @@
-/* fileline.c -- Get file and line number information in a backtrace.
-   Copyright (C) 2012-2021 Free Software Foundation, Inc.
-   Written by Ian Lance Taylor, Google.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-    (1) Redistributions of source code must retain the above copyright
-    notice, this list of conditions and the following disclaimer.
-
-    (2) Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in
-    the documentation and/or other materials provided with the
-    distribution.
-
-    (3) The name of the author may not be used to
-    endorse or promote products derived from this software without
-    specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
-IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
-INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
-IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGE.  */
-
-#include "config.h"
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <stdlib.h>
-#include <unistd.h>
-
-#if defined (HAVE_KERN_PROC_ARGS) || defined (HAVE_KERN_PROC)
-#include <sys/sysctl.h>
-#endif
-
-#ifdef HAVE_MACH_O_DYLD_H
-#include <mach-o/dyld.h>
-#endif
-
-#include "backtrace.h"
-#include "internal.h"
-
-#ifndef HAVE_GETEXECNAME
-#define getexecname() NULL
-#endif
-
-#if !defined (HAVE_KERN_PROC_ARGS) && !defined (HAVE_KERN_PROC)
-
-#define sysctl_exec_name1(state, error_callback, data) NULL
-#define sysctl_exec_name2(state, error_callback, data) NULL
-
-#else /* defined (HAVE_KERN_PROC_ARGS) || |defined (HAVE_KERN_PROC) */
-
-static char *
-sysctl_exec_name (struct backtrace_state *state,
-		  int mib0, int mib1, int mib2, int mib3,
-		  backtrace_error_callback error_callback, void *data)
-{
-  int mib[4];
-  size_t len;
-  char *name;
-  size_t rlen;
-
-  mib[0] = mib0;
-  mib[1] = mib1;
-  mib[2] = mib2;
-  mib[3] = mib3;
-
-  if (sysctl (mib, 4, NULL, &len, NULL, 0) < 0)
-    return NULL;
-  name = (char *) backtrace_alloc (state, len, error_callback, data);
-  if (name == NULL)
-    return NULL;
-  rlen = len;
-  if (sysctl (mib, 4, name, &rlen, NULL, 0) < 0)
-    {
-      backtrace_free (state, name, len, error_callback, data);
-      return NULL;
-    }
-  return name;
-}
-
-#ifdef HAVE_KERN_PROC_ARGS
-
-static char *
-sysctl_exec_name1 (struct backtrace_state *state,
-		   backtrace_error_callback error_callback, void *data)
-{
-  /* This variant is used on NetBSD.  */
-  return sysctl_exec_name (state, CTL_KERN, KERN_PROC_ARGS, -1,
-			   KERN_PROC_PATHNAME, error_callback, data);
-}
-
-#else
-
-#define sysctl_exec_name1(state, error_callback, data) NULL
-
-#endif
-
-#ifdef HAVE_KERN_PROC
-
-static char *
-sysctl_exec_name2 (struct backtrace_state *state,
-		   backtrace_error_callback error_callback, void *data)
-{
-  /* This variant is used on FreeBSD.  */
-  return sysctl_exec_name (state, CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1,
-			   error_callback, data);
-}
-
-#else
-
-#define sysctl_exec_name2(state, error_callback, data) NULL
-
-#endif
-
-#endif /* defined (HAVE_KERN_PROC_ARGS) || |defined (HAVE_KERN_PROC) */
-
-#ifdef HAVE_MACH_O_DYLD_H
-
-static char *
-macho_get_executable_path (struct backtrace_state *state,
-			   backtrace_error_callback error_callback, void *data)
-{
-  uint32_t len;
-  char *name;
-
-  len = 0;
-  if (_NSGetExecutablePath (NULL, &len) == 0)
-    return NULL;
-  name = (char *) backtrace_alloc (state, len, error_callback, data);
-  if (name == NULL)
-    return NULL;
-  if (_NSGetExecutablePath (name, &len) != 0)
-    {
-      backtrace_free (state, name, len, error_callback, data);
-      return NULL;
-    }
-  return name;
-}
-
-#else /* !defined (HAVE_MACH_O_DYLD_H) */
-
-#define macho_get_executable_path(state, error_callback, data) NULL
-
-#endif /* !defined (HAVE_MACH_O_DYLD_H) */
-
-/* Initialize the fileline information from the executable.  Returns 1
-   on success, 0 on failure.  */
-
-static int
-fileline_initialize (struct backtrace_state *state,
-		     backtrace_error_callback error_callback, void *data)
-{
-  int failed;
-  fileline fileline_fn;
-  int pass;
-  int called_error_callback;
-  int descriptor;
-  const char *filename;
-  char buf[64];
-
-  if (!state->threaded)
-    failed = state->fileline_initialization_failed;
-  else
-    failed = backtrace_atomic_load_int (&state->fileline_initialization_failed);
-
-  if (failed)
-    {
-      error_callback (data, "failed to read executable information", -1);
-      return 0;
-    }
-
-  if (!state->threaded)
-    fileline_fn = state->fileline_fn;
-  else
-    fileline_fn = backtrace_atomic_load_pointer (&state->fileline_fn);
-  if (fileline_fn != NULL)
-    return 1;
-
-  /* We have not initialized the information.  Do it now.  */
-
-  descriptor = -1;
-  called_error_callback = 0;
-  for (pass = 0; pass < 8; ++pass)
-    {
-      int does_not_exist;
-
-      switch (pass)
-	{
-	case 0:
-	  filename = state->filename;
-	  break;
-	case 1:
-	  filename = getexecname ();
-	  break;
-	case 2:
-	  filename = "/proc/self/exe";
-	  break;
-	case 3:
-	  filename = "/proc/curproc/file";
-	  break;
-	case 4:
-	  snprintf (buf, sizeof (buf), "/proc/%ld/object/a.out",
-		    (long) getpid ());
-	  filename = buf;
-	  break;
-	case 5:
-	  filename = sysctl_exec_name1 (state, error_callback, data);
-	  break;
-	case 6:
-	  filename = sysctl_exec_name2 (state, error_callback, data);
-	  break;
-	case 7:
-	  filename = macho_get_executable_path (state, error_callback, data);
-	  break;
-	default:
-	  abort ();
-	}
-
-      if (filename == NULL)
-	continue;
-
-      descriptor = backtrace_open (filename, error_callback, data,
-				   &does_not_exist);
-      if (descriptor < 0 && !does_not_exist)
-	{
-	  called_error_callback = 1;
-	  break;
-	}
-      if (descriptor >= 0)
-	break;
-    }
-
-  if (descriptor < 0)
-    {
-      if (!called_error_callback)
-	{
-	  if (state->filename != NULL)
-	    error_callback (data, state->filename, ENOENT);
-	  else
-	    error_callback (data,
-			    "libbacktrace could not find executable to open",
-			    0);
-	}
-      failed = 1;
-    }
-
-  if (!failed)
-    {
-      if (!backtrace_initialize (state, filename, descriptor, error_callback,
-				 data, &fileline_fn))
-	failed = 1;
-    }
-
-  if (failed)
-    {
-      if (!state->threaded)
-	state->fileline_initialization_failed = 1;
-      else
-	backtrace_atomic_store_int (&state->fileline_initialization_failed, 1);
-      return 0;
-    }
-
-  if (!state->threaded)
-    state->fileline_fn = fileline_fn;
-  else
-    {
-      backtrace_atomic_store_pointer (&state->fileline_fn, fileline_fn);
-
-      /* Note that if two threads initialize at once, one of the data
-	 sets may be leaked.  */
-    }
-
-  return 1;
-}
-
-/* Given a PC, find the file name, line number, and function name.  */
-
-int
-backtrace_pcinfo (struct backtrace_state *state, uintptr_t pc,
-		  backtrace_full_callback callback,
-		  backtrace_error_callback error_callback, void *data)
-{
-  if (!fileline_initialize (state, error_callback, data))
-    return 0;
-
-  if (state->fileline_initialization_failed)
-    return 0;
-
-  return state->fileline_fn (state, pc, callback, error_callback, data);
-}
-
-/* Given a PC, find the symbol for it, and its value.  */
-
-int
-backtrace_syminfo (struct backtrace_state *state, uintptr_t pc,
-		   backtrace_syminfo_callback callback,
-		   backtrace_error_callback error_callback, void *data)
-{
-  if (!fileline_initialize (state, error_callback, data))
-    return 0;
-
-  if (state->fileline_initialization_failed)
-    return 0;
-
-  state->syminfo_fn (state, pc, callback, error_callback, data);
-  return 1;
-}
-
-/* A backtrace_syminfo_callback that can call into a
-   backtrace_full_callback, used when we have a symbol table but no
-   debug info.  */
-
-void
-backtrace_syminfo_to_full_callback (void *data, uintptr_t pc,
-				    const char *symname,
-				    uintptr_t symval ATTRIBUTE_UNUSED,
-				    uintptr_t symsize ATTRIBUTE_UNUSED)
-{
-  struct backtrace_call_full *bdata = (struct backtrace_call_full *) data;
-
-  bdata->ret = bdata->full_callback (bdata->full_data, pc, NULL, 0, symname);
-}
-
-/* An error callback that corresponds to
-   backtrace_syminfo_to_full_callback.  */
-
-void
-backtrace_syminfo_to_full_error_callback (void *data, const char *msg,
-					  int errnum)
-{
-  struct backtrace_call_full *bdata = (struct backtrace_call_full *) data;
-
-  bdata->full_error_callback (bdata->full_data, msg, errnum);
-}
diff --git a/contrib/libs/backtrace/filenames.h b/contrib/libs/backtrace/filenames.h
deleted file mode 100644
index aa7bd7adff..0000000000
--- a/contrib/libs/backtrace/filenames.h
+++ /dev/null
@@ -1,52 +0,0 @@
-/* btest.c -- Filename header for libbacktrace library
-   Copyright (C) 2012-2018 Free Software Foundation, Inc.
-   Written by Ian Lance Taylor, Google.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-    (1) Redistributions of source code must retain the above copyright
-    notice, this list of conditions and the following disclaimer.
-
-    (2) Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in
-    the documentation and/or other materials provided with the
-    distribution.
-
-    (3) The name of the author may not be used to
-    endorse or promote products derived from this software without
-    specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
-IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
-INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
-IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGE.  */
-
-#ifndef GCC_VERSION
-# define GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__)
-#endif
-
-#if (GCC_VERSION < 2007)
-# define __attribute__(x)
-#endif
-
-#ifndef ATTRIBUTE_UNUSED
-# define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
-#endif
-
-#if defined(__MSDOS__) || defined(_WIN32) || defined(__OS2__) || defined (__CYGWIN__)
-# define IS_DIR_SEPARATOR(c) ((c) == '/' || (c) == '\\')
-# define HAS_DRIVE_SPEC(f) ((f)[0] != '\0' && (f)[1] == ':')
-# define IS_ABSOLUTE_PATH(f) (IS_DIR_SEPARATOR((f)[0]) || HAS_DRIVE_SPEC(f))
-#else
-# define IS_DIR_SEPARATOR(c) ((c) == '/')
-# define IS_ABSOLUTE_PATH(f) (IS_DIR_SEPARATOR((f)[0]))
-#endif
diff --git a/contrib/libs/backtrace/internal.h b/contrib/libs/backtrace/internal.h
deleted file mode 100644
index bb481f373b..0000000000
--- a/contrib/libs/backtrace/internal.h
+++ /dev/null
@@ -1,380 +0,0 @@
-/* internal.h -- Internal header file for stack backtrace library.
-   Copyright (C) 2012-2021 Free Software Foundation, Inc.
-   Written by Ian Lance Taylor, Google.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-    (1) Redistributions of source code must retain the above copyright
-    notice, this list of conditions and the following disclaimer.
-
-    (2) Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in
-    the documentation and/or other materials provided with the
-    distribution.
-
-    (3) The name of the author may not be used to
-    endorse or promote products derived from this software without
-    specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
-IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
-INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
-IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGE.  */
-
-#ifndef BACKTRACE_INTERNAL_H
-#define BACKTRACE_INTERNAL_H
-
-/* We assume that <sys/types.h> and "backtrace.h" have already been
-   included.  */
-
-#ifndef GCC_VERSION
-# define GCC_VERSION (__GNUC__ * 1000 + __GNUC_MINOR__)
-#endif
-
-#if (GCC_VERSION < 2007)
-# define __attribute__(x)
-#endif
-
-#ifndef ATTRIBUTE_UNUSED
-# define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
-#endif
-
-#ifndef ATTRIBUTE_MALLOC
-# if (GCC_VERSION >= 2096)
-#  define ATTRIBUTE_MALLOC __attribute__ ((__malloc__))
-# else
-#  define ATTRIBUTE_MALLOC
-# endif
-#endif
-
-#ifndef ATTRIBUTE_FALLTHROUGH
-# if (GCC_VERSION >= 7000)
-#  define ATTRIBUTE_FALLTHROUGH __attribute__ ((__fallthrough__))
-# else
-#  define ATTRIBUTE_FALLTHROUGH
-# endif
-#endif
-
-#ifndef HAVE_SYNC_FUNCTIONS
-
-/* Define out the sync functions.  These should never be called if
-   they are not available.  */
-
-#define __sync_bool_compare_and_swap(A, B, C) (abort(), 1)
-#define __sync_lock_test_and_set(A, B) (abort(), 0)
-#define __sync_lock_release(A) abort()
-
-#endif /* !defined (HAVE_SYNC_FUNCTIONS) */
-
-#ifdef HAVE_ATOMIC_FUNCTIONS
-
-/* We have the atomic builtin functions.  */
-
-#define backtrace_atomic_load_pointer(p) \
-    __atomic_load_n ((p), __ATOMIC_ACQUIRE)
-#define backtrace_atomic_load_int(p) \
-    __atomic_load_n ((p), __ATOMIC_ACQUIRE)
-#define backtrace_atomic_store_pointer(p, v) \
-    __atomic_store_n ((p), (v), __ATOMIC_RELEASE)
-#define backtrace_atomic_store_size_t(p, v) \
-    __atomic_store_n ((p), (v), __ATOMIC_RELEASE)
-#define backtrace_atomic_store_int(p, v) \
-    __atomic_store_n ((p), (v), __ATOMIC_RELEASE)
-
-#else /* !defined (HAVE_ATOMIC_FUNCTIONS) */
-#ifdef HAVE_SYNC_FUNCTIONS
-
-/* We have the sync functions but not the atomic functions.  Define
-   the atomic ones in terms of the sync ones.  */
-
-extern void *backtrace_atomic_load_pointer (void *);
-extern int backtrace_atomic_load_int (int *);
-extern void backtrace_atomic_store_pointer (void *, void *);
-extern void backtrace_atomic_store_size_t (size_t *, size_t);
-extern void backtrace_atomic_store_int (int *, int);
-
-#else /* !defined (HAVE_SYNC_FUNCTIONS) */
-
-/* We have neither the sync nor the atomic functions.  These will
-   never be called.  */
-
-#define backtrace_atomic_load_pointer(p) (abort(), (void *) NULL)
-#define backtrace_atomic_load_int(p) (abort(), 0)
-#define backtrace_atomic_store_pointer(p, v) abort()
-#define backtrace_atomic_store_size_t(p, v) abort()
-#define backtrace_atomic_store_int(p, v) abort()
-
-#endif /* !defined (HAVE_SYNC_FUNCTIONS) */
-#endif /* !defined (HAVE_ATOMIC_FUNCTIONS) */
-
-/* The type of the function that collects file/line information.  This
-   is like backtrace_pcinfo.  */
-
-typedef int (*fileline) (struct backtrace_state *state, uintptr_t pc,
-			 backtrace_full_callback callback,
-			 backtrace_error_callback error_callback, void *data);
-
-/* The type of the function that collects symbol information.  This is
-   like backtrace_syminfo.  */
-
-typedef void (*syminfo) (struct backtrace_state *state, uintptr_t pc,
-			 backtrace_syminfo_callback callback,
-			 backtrace_error_callback error_callback, void *data);
-
-/* What the backtrace state pointer points to.  */
-
-struct backtrace_state
-{
-  /* The name of the executable.  */
-  const char *filename;
-  /* Non-zero if threaded.  */
-  int threaded;
-  /* The master lock for fileline_fn, fileline_data, syminfo_fn,
-     syminfo_data, fileline_initialization_failed and everything the
-     data pointers point to.  */
-  void *lock;
-  /* The function that returns file/line information.  */
-  fileline fileline_fn;
-  /* The data to pass to FILELINE_FN.  */
-  void *fileline_data;
-  /* The function that returns symbol information.  */
-  syminfo syminfo_fn;
-  /* The data to pass to SYMINFO_FN.  */
-  void *syminfo_data;
-  /* Whether initializing the file/line information failed.  */
-  int fileline_initialization_failed;
-  /* The lock for the freelist.  */
-  int lock_alloc;
-  /* The freelist when using mmap.  */
-  struct backtrace_freelist_struct *freelist;
-};
-
-/* Open a file for reading.  Returns -1 on error.  If DOES_NOT_EXIST
-   is not NULL, *DOES_NOT_EXIST will be set to 0 normally and set to 1
-   if the file does not exist.  If the file does not exist and
-   DOES_NOT_EXIST is not NULL, the function will return -1 and will
-   not call ERROR_CALLBACK.  On other errors, or if DOES_NOT_EXIST is
-   NULL, the function will call ERROR_CALLBACK before returning.  */
-extern int backtrace_open (const char *filename,
-			   backtrace_error_callback error_callback,
-			   void *data,
-			   int *does_not_exist);
-
-/* A view of the contents of a file.  This supports mmap when
-   available.  A view will remain in memory even after backtrace_close
-   is called on the file descriptor from which the view was
-   obtained.  */
-
-struct backtrace_view
-{
-  /* The data that the caller requested.  */
-  const void *data;
-  /* The base of the view.  */
-  void *base;
-  /* The total length of the view.  */
-  size_t len;
-};
-
-/* Create a view of SIZE bytes from DESCRIPTOR at OFFSET.  Store the
-   result in *VIEW.  Returns 1 on success, 0 on error.  */
-extern int backtrace_get_view (struct backtrace_state *state, int descriptor,
-			       off_t offset, uint64_t size,
-			       backtrace_error_callback error_callback,
-			       void *data, struct backtrace_view *view);
-
-/* Release a view created by backtrace_get_view.  */
-extern void backtrace_release_view (struct backtrace_state *state,
-				    struct backtrace_view *view,
-				    backtrace_error_callback error_callback,
-				    void *data);
-
-/* Close a file opened by backtrace_open.  Returns 1 on success, 0 on
-   error.  */
-
-extern int backtrace_close (int descriptor,
-			    backtrace_error_callback error_callback,
-			    void *data);
-
-/* Sort without using memory.  */
-
-extern void backtrace_qsort (void *base, size_t count, size_t size,
-			     int (*compar) (const void *, const void *));
-
-/* Allocate memory.  This is like malloc.  If ERROR_CALLBACK is NULL,
-   this does not report an error, it just returns NULL.  */
-
-extern void *backtrace_alloc (struct backtrace_state *state, size_t size,
-			      backtrace_error_callback error_callback,
-			      void *data) ATTRIBUTE_MALLOC;
-
-/* Free memory allocated by backtrace_alloc.  If ERROR_CALLBACK is
-   NULL, this does not report an error.  */
-
-extern void backtrace_free (struct backtrace_state *state, void *mem,
-			    size_t size,
-			    backtrace_error_callback error_callback,
-			    void *data);
-
-/* A growable vector of some struct.  This is used for more efficient
-   allocation when we don't know the final size of some group of data
-   that we want to represent as an array.  */
-
-struct backtrace_vector
-{
-  /* The base of the vector.  */
-  void *base;
-  /* The number of bytes in the vector.  */
-  size_t size;
-  /* The number of bytes available at the current allocation.  */
-  size_t alc;
-};
-
-/* Grow VEC by SIZE bytes.  Return a pointer to the newly allocated
-   bytes.  Note that this may move the entire vector to a new memory
-   location.  Returns NULL on failure.  */
-
-extern void *backtrace_vector_grow (struct backtrace_state *state, size_t size,
-				    backtrace_error_callback error_callback,
-				    void *data,
-				    struct backtrace_vector *vec);
-
-/* Finish the current allocation on VEC.  Prepare to start a new
-   allocation.  The finished allocation will never be freed.  Returns
-   a pointer to the base of the finished entries, or NULL on
-   failure.  */
-
-extern void* backtrace_vector_finish (struct backtrace_state *state,
-				      struct backtrace_vector *vec,
-				      backtrace_error_callback error_callback,
-				      void *data);
-
-/* Release any extra space allocated for VEC.  This may change
-   VEC->base.  Returns 1 on success, 0 on failure.  */
-
-extern int backtrace_vector_release (struct backtrace_state *state,
-				     struct backtrace_vector *vec,
-				     backtrace_error_callback error_callback,
-				     void *data);
-
-/* Free the space managed by VEC.  This will reset VEC.  */
-
-static inline void
-backtrace_vector_free (struct backtrace_state *state,
-		       struct backtrace_vector *vec,
-		       backtrace_error_callback error_callback, void *data)
-{
-  vec->alc += vec->size;
-  vec->size = 0;
-  backtrace_vector_release (state, vec, error_callback, data);
-}
-
-/* Read initial debug data from a descriptor, and set the
-   fileline_data, syminfo_fn, and syminfo_data fields of STATE.
-   Return the fileln_fn field in *FILELN_FN--this is done this way so
-   that the synchronization code is only implemented once.  This is
-   called after the descriptor has first been opened.  It will close
-   the descriptor if it is no longer needed.  Returns 1 on success, 0
-   on error.  There will be multiple implementations of this function,
-   for different file formats.  Each system will compile the
-   appropriate one.  */
-
-extern int backtrace_initialize (struct backtrace_state *state,
-				 const char *filename,
-				 int descriptor,
-				 backtrace_error_callback error_callback,
-				 void *data,
-				 fileline *fileline_fn);
-
-/* An enum for the DWARF sections we care about.  */
-
-enum dwarf_section
-{
-  DEBUG_INFO,
-  DEBUG_LINE,
-  DEBUG_ABBREV,
-  DEBUG_RANGES,
-  DEBUG_STR,
-  DEBUG_ADDR,
-  DEBUG_STR_OFFSETS,
-  DEBUG_LINE_STR,
-  DEBUG_RNGLISTS,
-
-  DEBUG_MAX
-};
-
-/* Data for the DWARF sections we care about.  */
-
-struct dwarf_sections
-{
-  const unsigned char *data[DEBUG_MAX];
-  size_t size[DEBUG_MAX];
-};
-
-/* DWARF data read from a file, used for .gnu_debugaltlink.  */
-
-struct dwarf_data;
-
-/* Add file/line information for a DWARF module.  */
-
-extern int backtrace_dwarf_add (struct backtrace_state *state,
-				uintptr_t base_address,
-				const struct dwarf_sections *dwarf_sections,
-				int is_bigendian,
-				struct dwarf_data *fileline_altlink,
-				backtrace_error_callback error_callback,
-				void *data, fileline *fileline_fn,
-				struct dwarf_data **fileline_entry);
-
-/* A data structure to pass to backtrace_syminfo_to_full.  */
-
-struct backtrace_call_full
-{
-  backtrace_full_callback full_callback;
-  backtrace_error_callback full_error_callback;
-  void *full_data;
-  int ret;
-};
-
-/* A backtrace_syminfo_callback that can call into a
-   backtrace_full_callback, used when we have a symbol table but no
-   debug info.  */
-
-extern void backtrace_syminfo_to_full_callback (void *data, uintptr_t pc,
-						const char *symname,
-						uintptr_t symval,
-						uintptr_t symsize);
-
-/* An error callback that corresponds to
-   backtrace_syminfo_to_full_callback.  */
-
-extern void backtrace_syminfo_to_full_error_callback (void *, const char *,
-						      int);
-
-/* A test-only hook for elf_uncompress_zdebug.  */
-
-extern int backtrace_uncompress_zdebug (struct backtrace_state *,
-					const unsigned char *compressed,
-					size_t compressed_size,
-					backtrace_error_callback, void *data,
-					unsigned char **uncompressed,
-					size_t *uncompressed_size);
-
-/* A test-only hook for elf_uncompress_lzma.  */
-
-extern int backtrace_uncompress_lzma (struct backtrace_state *,
-				      const unsigned char *compressed,
-				      size_t compressed_size,
-				      backtrace_error_callback, void *data,
-				      unsigned char **uncompressed,
-				      size_t *uncompressed_size);
-
-#endif
diff --git a/contrib/libs/backtrace/mmap.c b/contrib/libs/backtrace/mmap.c
deleted file mode 100644
index d7313be73f..0000000000
--- a/contrib/libs/backtrace/mmap.c
+++ /dev/null
@@ -1,331 +0,0 @@
-/* mmap.c -- Memory allocation with mmap.
-   Copyright (C) 2012-2021 Free Software Foundation, Inc.
-   Written by Ian Lance Taylor, Google.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-    (1) Redistributions of source code must retain the above copyright
-    notice, this list of conditions and the following disclaimer.
-
-    (2) Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in
-    the documentation and/or other materials provided with the
-    distribution.
-
-    (3) The name of the author may not be used to
-    endorse or promote products derived from this software without
-    specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
-IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
-INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
-IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGE.  */
-
-#include "config.h"
-
-#include <errno.h>
-#include <string.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/mman.h>
-
-#include "backtrace.h"
-#include "internal.h"
-
-#ifndef HAVE_DECL_GETPAGESIZE
-extern int getpagesize (void);
-#endif
-
-/* Memory allocation on systems that provide anonymous mmap.  This
-   permits the backtrace functions to be invoked from a signal
-   handler, assuming that mmap is async-signal safe.  */
-
-#ifndef MAP_ANONYMOUS
-#define MAP_ANONYMOUS MAP_ANON
-#endif
-
-#ifndef MAP_FAILED
-#define MAP_FAILED ((void *)-1)
-#endif
-
-/* A list of free memory blocks.  */
-
-struct backtrace_freelist_struct
-{
-  /* Next on list.  */
-  struct backtrace_freelist_struct *next;
-  /* Size of this block, including this structure.  */
-  size_t size;
-};
-
-/* Free memory allocated by backtrace_alloc.  */
-
-static void
-backtrace_free_locked (struct backtrace_state *state, void *addr, size_t size)
-{
-  /* Just leak small blocks.  We don't have to be perfect.  Don't put
-     more than 16 entries on the free list, to avoid wasting time
-     searching when allocating a block.  If we have more than 16
-     entries, leak the smallest entry.  */
-
-  if (size >= sizeof (struct backtrace_freelist_struct))
-    {
-      size_t c;
-      struct backtrace_freelist_struct **ppsmall;
-      struct backtrace_freelist_struct **pp;
-      struct backtrace_freelist_struct *p;
-
-      c = 0;
-      ppsmall = NULL;
-      for (pp = &state->freelist; *pp != NULL; pp = &(*pp)->next)
-	{
-	  if (ppsmall == NULL || (*pp)->size < (*ppsmall)->size)
-	    ppsmall = pp;
-	  ++c;
-	}
-      if (c >= 16)
-	{
-	  if (size <= (*ppsmall)->size)
-	    return;
-	  *ppsmall = (*ppsmall)->next;
-	}
-
-      p = (struct backtrace_freelist_struct *) addr;
-      p->next = state->freelist;
-      p->size = size;
-      state->freelist = p;
-    }
-}
-
-/* Allocate memory like malloc.  If ERROR_CALLBACK is NULL, don't
-   report an error.  */
-
-void *
-backtrace_alloc (struct backtrace_state *state,
-		 size_t size, backtrace_error_callback error_callback,
-		 void *data)
-{
-  void *ret;
-  int locked;
-  struct backtrace_freelist_struct **pp;
-  size_t pagesize;
-  size_t asksize;
-  void *page;
-
-  ret = NULL;
-
-  /* If we can acquire the lock, then see if there is space on the
-     free list.  If we can't acquire the lock, drop straight into
-     using mmap.  __sync_lock_test_and_set returns the old state of
-     the lock, so we have acquired it if it returns 0.  */
-
-  if (!state->threaded)
-    locked = 1;
-  else
-    locked = __sync_lock_test_and_set (&state->lock_alloc, 1) == 0;
-
-  if (locked)
-    {
-      for (pp = &state->freelist; *pp != NULL; pp = &(*pp)->next)
-	{
-	  if ((*pp)->size >= size)
-	    {
-	      struct backtrace_freelist_struct *p;
-
-	      p = *pp;
-	      *pp = p->next;
-
-	      /* Round for alignment; we assume that no type we care about
-		 is more than 8 bytes.  */
-	      size = (size + 7) & ~ (size_t) 7;
-	      if (size < p->size)
-		backtrace_free_locked (state, (char *) p + size,
-				       p->size - size);
-
-	      ret = (void *) p;
-
-	      break;
-	    }
-	}
-
-      if (state->threaded)
-	__sync_lock_release (&state->lock_alloc);
-    }
-
-  if (ret == NULL)
-    {
-      /* Allocate a new page.  */
-
-      pagesize = getpagesize ();
-      asksize = (size + pagesize - 1) & ~ (pagesize - 1);
-      page = mmap (NULL, asksize, PROT_READ | PROT_WRITE,
-		   MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-      if (page == MAP_FAILED)
-	{
-	  if (error_callback)
-	    error_callback (data, "mmap", errno);
-	}
-      else
-	{
-	  size = (size + 7) & ~ (size_t) 7;
-	  if (size < asksize)
-	    backtrace_free (state, (char *) page + size, asksize - size,
-			    error_callback, data);
-
-	  ret = page;
-	}
-    }
-
-  return ret;
-}
-
-/* Free memory allocated by backtrace_alloc.  */
-
-void
-backtrace_free (struct backtrace_state *state, void *addr, size_t size,
-		backtrace_error_callback error_callback ATTRIBUTE_UNUSED,
-		void *data ATTRIBUTE_UNUSED)
-{
-  int locked;
-
-  /* If we are freeing a large aligned block, just release it back to
-     the system.  This case arises when growing a vector for a large
-     binary with lots of debug info.  Calling munmap here may cause us
-     to call mmap again if there is also a large shared library; we
-     just live with that.  */
-  if (size >= 16 * 4096)
-    {
-      size_t pagesize;
-
-      pagesize = getpagesize ();
-      if (((uintptr_t) addr & (pagesize - 1)) == 0
-	  && (size & (pagesize - 1)) == 0)
-	{
-	  /* If munmap fails for some reason, just add the block to
-	     the freelist.  */
-	  if (munmap (addr, size) == 0)
-	    return;
-	}
-    }
-
-  /* If we can acquire the lock, add the new space to the free list.
-     If we can't acquire the lock, just leak the memory.
-     __sync_lock_test_and_set returns the old state of the lock, so we
-     have acquired it if it returns 0.  */
-
-  if (!state->threaded)
-    locked = 1;
-  else
-    locked = __sync_lock_test_and_set (&state->lock_alloc, 1) == 0;
-
-  if (locked)
-    {
-      backtrace_free_locked (state, addr, size);
-
-      if (state->threaded)
-	__sync_lock_release (&state->lock_alloc);
-    }
-}
-
-/* Grow VEC by SIZE bytes.  */
-
-void *
-backtrace_vector_grow (struct backtrace_state *state,size_t size,
-		       backtrace_error_callback error_callback,
-		       void *data, struct backtrace_vector *vec)
-{
-  void *ret;
-
-  if (size > vec->alc)
-    {
-      size_t pagesize;
-      size_t alc;
-      void *base;
-
-      pagesize = getpagesize ();
-      alc = vec->size + size;
-      if (vec->size == 0)
-	alc = 16 * size;
-      else if (alc < pagesize)
-	{
-	  alc *= 2;
-	  if (alc > pagesize)
-	    alc = pagesize;
-	}
-      else
-	{
-	  alc *= 2;
-	  alc = (alc + pagesize - 1) & ~ (pagesize - 1);
-	}
-      base = backtrace_alloc (state, alc, error_callback, data);
-      if (base == NULL)
-	return NULL;
-      if (vec->base != NULL)
-	{
-	  memcpy (base, vec->base, vec->size);
-	  backtrace_free (state, vec->base, vec->size + vec->alc,
-			  error_callback, data);
-	}
-      vec->base = base;
-      vec->alc = alc - vec->size;
-    }
-
-  ret = (char *) vec->base + vec->size;
-  vec->size += size;
-  vec->alc -= size;
-  return ret;
-}
-
-/* Finish the current allocation on VEC.  */
-
-void *
-backtrace_vector_finish (
-  struct backtrace_state *state ATTRIBUTE_UNUSED,
-  struct backtrace_vector *vec,
-  backtrace_error_callback error_callback ATTRIBUTE_UNUSED,
-  void *data ATTRIBUTE_UNUSED)
-{
-  void *ret;
-
-  ret = vec->base;
-  vec->base = (char *) vec->base + vec->size;
-  vec->size = 0;
-  return ret;
-}
-
-/* Release any extra space allocated for VEC.  */
-
-int
-backtrace_vector_release (struct backtrace_state *state,
-			  struct backtrace_vector *vec,
-			  backtrace_error_callback error_callback,
-			  void *data)
-{
-  size_t size;
-  size_t alc;
-  size_t aligned;
-
-  /* Make sure that the block that we free is aligned on an 8-byte
-     boundary.  */
-  size = vec->size;
-  alc = vec->alc;
-  aligned = (size + 7) & ~ (size_t) 7;
-  alc -= aligned - size;
-
-  backtrace_free (state, (char *) vec->base + aligned, alc,
-		  error_callback, data);
-  vec->alc = 0;
-  if (vec->size == 0)
-    vec->base = NULL;
-  return 1;
-}
diff --git a/contrib/libs/backtrace/mmapio.c b/contrib/libs/backtrace/mmapio.c
deleted file mode 100644
index 7f6fa8d274..0000000000
--- a/contrib/libs/backtrace/mmapio.c
+++ /dev/null
@@ -1,110 +0,0 @@
-/* mmapio.c -- File views using mmap.
-   Copyright (C) 2012-2021 Free Software Foundation, Inc.
-   Written by Ian Lance Taylor, Google.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-    (1) Redistributions of source code must retain the above copyright
-    notice, this list of conditions and the following disclaimer.
-
-    (2) Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in
-    the documentation and/or other materials provided with the
-    distribution.
-
-    (3) The name of the author may not be used to
-    endorse or promote products derived from this software without
-    specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
-IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
-INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
-IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGE.  */
-
-#include "config.h"
-
-#include <errno.h>
-#include <sys/types.h>
-#include <sys/mman.h>
-#include <unistd.h>
-
-#include "backtrace.h"
-#include "internal.h"
-
-#ifndef HAVE_DECL_GETPAGESIZE
-extern int getpagesize (void);
-#endif
-
-#ifndef MAP_FAILED
-#define MAP_FAILED ((void *)-1)
-#endif
-
-/* This file implements file views and memory allocation when mmap is
-   available.  */
-
-/* Create a view of SIZE bytes from DESCRIPTOR at OFFSET.  */
-
-int
-backtrace_get_view (struct backtrace_state *state ATTRIBUTE_UNUSED,
-		    int descriptor, off_t offset, uint64_t size,
-		    backtrace_error_callback error_callback,
-		    void *data, struct backtrace_view *view)
-{
-  size_t pagesize;
-  unsigned int inpage;
-  off_t pageoff;
-  void *map;
-
-  if ((uint64_t) (size_t) size != size)
-    {
-      error_callback (data, "file size too large", 0);
-      return 0;
-    }
-
-  pagesize = getpagesize ();
-  inpage = offset % pagesize;
-  pageoff = offset - inpage;
-
-  size += inpage;
-  size = (size + (pagesize - 1)) & ~ (pagesize - 1);
-
-  map = mmap (NULL, size, PROT_READ, MAP_PRIVATE, descriptor, pageoff);
-  if (map == MAP_FAILED)
-    {
-      error_callback (data, "mmap", errno);
-      return 0;
-    }
-
-  view->data = (char *) map + inpage;
-  view->base = map;
-  view->len = size;
-
-  return 1;
-}
-
-/* Release a view read by backtrace_get_view.  */
-
-void
-backtrace_release_view (struct backtrace_state *state ATTRIBUTE_UNUSED,
-			struct backtrace_view *view,
-			backtrace_error_callback error_callback,
-			void *data)
-{
-  union {
-    const void *cv;
-    void *v;
-  } const_cast;
-
-  const_cast.cv = view->base;
-  if (munmap (const_cast.v, view->len) < 0)
-    error_callback (data, "munmap", errno);
-}
diff --git a/contrib/libs/backtrace/posix.c b/contrib/libs/backtrace/posix.c
deleted file mode 100644
index 924631d2e6..0000000000
--- a/contrib/libs/backtrace/posix.c
+++ /dev/null
@@ -1,104 +0,0 @@
-/* posix.c -- POSIX file I/O routines for the backtrace library.
-   Copyright (C) 2012-2021 Free Software Foundation, Inc.
-   Written by Ian Lance Taylor, Google.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-    (1) Redistributions of source code must retain the above copyright
-    notice, this list of conditions and the following disclaimer.
-
-    (2) Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in
-    the documentation and/or other materials provided with the
-    distribution.
-
-    (3) The name of the author may not be used to
-    endorse or promote products derived from this software without
-    specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
-IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
-INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
-IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGE.  */
-
-#include "config.h"
-
-#include <errno.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
-
-#include "backtrace.h"
-#include "internal.h"
-
-#ifndef O_BINARY
-#define O_BINARY 0
-#endif
-
-#ifndef O_CLOEXEC
-#define O_CLOEXEC 0
-#endif
-
-#ifndef FD_CLOEXEC
-#define FD_CLOEXEC 1
-#endif
-
-/* Open a file for reading.  */
-
-int
-backtrace_open (const char *filename, backtrace_error_callback error_callback,
-		void *data, int *does_not_exist)
-{
-  int descriptor;
-
-  if (does_not_exist != NULL)
-    *does_not_exist = 0;
-
-  descriptor = open (filename, (int) (O_RDONLY | O_BINARY | O_CLOEXEC));
-  if (descriptor < 0)
-    {
-      /* If DOES_NOT_EXIST is not NULL, then don't call ERROR_CALLBACK
-	 if the file does not exist.  We treat lacking permission to
-	 open the file as the file not existing; this case arises when
-	 running the libgo syscall package tests as root.  */
-      if (does_not_exist != NULL && (errno == ENOENT || errno == EACCES))
-	*does_not_exist = 1;
-      else
-	error_callback (data, filename, errno);
-      return -1;
-    }
-
-#ifdef HAVE_FCNTL
-  /* Set FD_CLOEXEC just in case the kernel does not support
-     O_CLOEXEC. It doesn't matter if this fails for some reason.
-     FIXME: At some point it should be safe to only do this if
-     O_CLOEXEC == 0.  */
-  fcntl (descriptor, F_SETFD, FD_CLOEXEC);
-#endif
-
-  return descriptor;
-}
-
-/* Close DESCRIPTOR.  */
-
-int
-backtrace_close (int descriptor, backtrace_error_callback error_callback,
-		 void *data)
-{
-  if (close (descriptor) < 0)
-    {
-      error_callback (data, "close", errno);
-      return 0;
-    }
-  return 1;
-}
diff --git a/contrib/libs/backtrace/print.c b/contrib/libs/backtrace/print.c
deleted file mode 100644
index 93d0d3abb4..0000000000
--- a/contrib/libs/backtrace/print.c
+++ /dev/null
@@ -1,92 +0,0 @@
-/* print.c -- Print the current backtrace.
-   Copyright (C) 2012-2021 Free Software Foundation, Inc.
-   Written by Ian Lance Taylor, Google.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-    (1) Redistributions of source code must retain the above copyright
-    notice, this list of conditions and the following disclaimer.
-
-    (2) Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in
-    the documentation and/or other materials provided with the
-    distribution.
-
-    (3) The name of the author may not be used to
-    endorse or promote products derived from this software without
-    specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
-IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
-INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
-IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGE.  */
-
-#include "config.h"
-
-#include <stdio.h>
-#include <string.h>
-#include <sys/types.h>
-
-#include "backtrace.h"
-#include "internal.h"
-
-/* Passed to callbacks.  */
-
-struct print_data
-{
-  struct backtrace_state *state;
-  FILE *f;
-};
-
-/* Print one level of a backtrace.  */
-
-static int
-print_callback (void *data, uintptr_t pc, const char *filename, int lineno,
-		const char *function)
-{
-  struct print_data *pdata = (struct print_data *) data;
-
-  fprintf (pdata->f, "0x%lx %s\n\t%s:%d\n",
-	   (unsigned long) pc,
-	   function == NULL ? "???" : function,
-	   filename == NULL ? "???" : filename,
-	   lineno);
-  return 0;
-}
-
-/* Print errors to stderr.  */
-
-static void
-error_callback (void *data, const char *msg, int errnum)
-{
-  struct print_data *pdata = (struct print_data *) data;
-
-  if (pdata->state->filename != NULL)
-    fprintf (stderr, "%s: ", pdata->state->filename);
-  fprintf (stderr, "libbacktrace: %s", msg);
-  if (errnum > 0)
-    fprintf (stderr, ": %s", strerror (errnum));
-  fputc ('\n', stderr);
-}
-
-/* Print a backtrace.  */
-
-void __attribute__((noinline))
-backtrace_print (struct backtrace_state *state, int skip, FILE *f)
-{
-  struct print_data data;
-
-  data.state = state;
-  data.f = f;
-  backtrace_full (state, skip + 1, print_callback, error_callback,
-		  (void *) &data);
-}
diff --git a/contrib/libs/backtrace/simple.c b/contrib/libs/backtrace/simple.c
deleted file mode 100644
index 785e726e6b..0000000000
--- a/contrib/libs/backtrace/simple.c
+++ /dev/null
@@ -1,108 +0,0 @@
-/* simple.c -- The backtrace_simple function.
-   Copyright (C) 2012-2021 Free Software Foundation, Inc.
-   Written by Ian Lance Taylor, Google.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-    (1) Redistributions of source code must retain the above copyright
-    notice, this list of conditions and the following disclaimer.
-
-    (2) Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in
-    the documentation and/or other materials provided with the
-    distribution.
-
-    (3) The name of the author may not be used to
-    endorse or promote products derived from this software without
-    specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
-IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
-INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
-IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGE.  */
-
-#include "config.h"
-
-#include "unwind.h"
-#include "backtrace.h"
-
-/* The simple_backtrace routine.  */
-
-/* Data passed through _Unwind_Backtrace.  */
-
-struct backtrace_simple_data
-{
-  /* Number of frames to skip.  */
-  int skip;
-  /* Library state.  */
-  struct backtrace_state *state;
-  /* Callback routine.  */
-  backtrace_simple_callback callback;
-  /* Error callback routine.  */
-  backtrace_error_callback error_callback;
-  /* Data to pass to callback routine.  */
-  void *data;
-  /* Value to return from backtrace.  */
-  int ret;
-};
-
-/* Unwind library callback routine.  This is passed to
-   _Unwind_Backtrace.  */
-
-static _Unwind_Reason_Code
-simple_unwind (struct _Unwind_Context *context, void *vdata)
-{
-  struct backtrace_simple_data *bdata = (struct backtrace_simple_data *) vdata;
-  uintptr_t pc;
-  int ip_before_insn = 0;
-
-#ifdef HAVE_GETIPINFO
-  pc = _Unwind_GetIPInfo (context, &ip_before_insn);
-#else
-  pc = _Unwind_GetIP (context);
-#endif
-
-  if (bdata->skip > 0)
-    {
-      --bdata->skip;
-      return _URC_NO_REASON;
-    }
-
-  if (!ip_before_insn)
-    --pc;
-
-  bdata->ret = bdata->callback (bdata->data, pc);
-
-  if (bdata->ret != 0)
-    return _URC_END_OF_STACK;
-
-  return _URC_NO_REASON;
-}
-
-/* Get a simple stack backtrace.  */
-
-int __attribute__((noinline))
-backtrace_simple (struct backtrace_state *state, int skip,
-		  backtrace_simple_callback callback,
-		  backtrace_error_callback error_callback, void *data)
-{
-  struct backtrace_simple_data bdata;
-
-  bdata.skip = skip + 1;
-  bdata.state = state;
-  bdata.callback = callback;
-  bdata.error_callback = error_callback;
-  bdata.data = data;
-  bdata.ret = 0;
-  _Unwind_Backtrace (simple_unwind, &bdata);
-  return bdata.ret;
-}
diff --git a/contrib/libs/backtrace/sort.c b/contrib/libs/backtrace/sort.c
deleted file mode 100644
index a60a980e65..0000000000
--- a/contrib/libs/backtrace/sort.c
+++ /dev/null
@@ -1,108 +0,0 @@
-/* sort.c -- Sort without allocating memory
-   Copyright (C) 2012-2021 Free Software Foundation, Inc.
-   Written by Ian Lance Taylor, Google.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-    (1) Redistributions of source code must retain the above copyright
-    notice, this list of conditions and the following disclaimer.
-
-    (2) Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in
-    the documentation and/or other materials provided with the
-    distribution.
-
-    (3) The name of the author may not be used to
-    endorse or promote products derived from this software without
-    specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
-IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
-INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
-IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGE.  */
-
-#include "config.h"
-
-#include <stddef.h>
-#include <sys/types.h>
-
-#include "backtrace.h"
-#include "internal.h"
-
-/* The GNU glibc version of qsort allocates memory, which we must not
-   do if we are invoked by a signal handler.  So provide our own
-   sort.  */
-
-static void
-swap (char *a, char *b, size_t size)
-{
-  size_t i;
-
-  for (i = 0; i < size; i++, a++, b++)
-    {
-      char t;
-
-      t = *a;
-      *a = *b;
-      *b = t;
-    }
-}
-
-void
-backtrace_qsort (void *basearg, size_t count, size_t size,
-		 int (*compar) (const void *, const void *))
-{
-  char *base = (char *) basearg;
-  size_t i;
-  size_t mid;
-
- tail_recurse:
-  if (count < 2)
-    return;
-
-  /* The symbol table and DWARF tables, which is all we use this
-     routine for, tend to be roughly sorted.  Pick the middle element
-     in the array as our pivot point, so that we are more likely to
-     cut the array in half for each recursion step.  */
-  swap (base, base + (count / 2) * size, size);
-
-  mid = 0;
-  for (i = 1; i < count; i++)
-    {
-      if ((*compar) (base, base + i * size) > 0)
-	{
-	  ++mid;
-	  if (i != mid)
-	    swap (base + mid * size, base + i * size, size);
-	}
-    }
-
-  if (mid > 0)
-    swap (base, base + mid * size, size);
-
-  /* Recurse with the smaller array, loop with the larger one.  That
-     ensures that our maximum stack depth is log count.  */
-  if (2 * mid < count)
-    {
-      backtrace_qsort (base, mid, size, compar);
-      base += (mid + 1) * size;
-      count -= mid + 1;
-      goto tail_recurse;
-    }
-  else
-    {
-      backtrace_qsort (base + (mid + 1) * size, count - (mid + 1),
-		       size, compar);
-      count = mid;
-      goto tail_recurse;
-    }
-}
diff --git a/contrib/libs/backtrace/state.c b/contrib/libs/backtrace/state.c
deleted file mode 100644
index 0f368a2390..0000000000
--- a/contrib/libs/backtrace/state.c
+++ /dev/null
@@ -1,72 +0,0 @@
-/* state.c -- Create the backtrace state.
-   Copyright (C) 2012-2021 Free Software Foundation, Inc.
-   Written by Ian Lance Taylor, Google.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-    (1) Redistributions of source code must retain the above copyright
-    notice, this list of conditions and the following disclaimer.
-
-    (2) Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in
-    the documentation and/or other materials provided with the
-    distribution.
-
-    (3) The name of the author may not be used to
-    endorse or promote products derived from this software without
-    specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
-IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
-INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
-IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGE.  */
-
-#include "config.h"
-
-#include <string.h>
-#include <sys/types.h>
-
-#include "backtrace.h"
-#include "backtrace-supported.h"
-#include "internal.h"
-
-/* Create the backtrace state.  This will then be passed to all the
-   other routines.  */
-
-struct backtrace_state *
-backtrace_create_state (const char *filename, int threaded,
-			backtrace_error_callback error_callback,
-			void *data)
-{
-  struct backtrace_state init_state;
-  struct backtrace_state *state;
-
-#ifndef HAVE_SYNC_FUNCTIONS
-  if (threaded)
-    {
-      error_callback (data, "backtrace library does not support threads", 0);
-      return NULL;
-    }
-#endif
-
-  memset (&init_state, 0, sizeof init_state);
-  init_state.filename = filename;
-  init_state.threaded = threaded;
-
-  state = ((struct backtrace_state *)
-	   backtrace_alloc (&init_state, sizeof *state, error_callback, data));
-  if (state == NULL)
-    return NULL;
-  *state = init_state;
-
-  return state;
-}
diff --git a/contrib/libs/python/Include/bufferobject.h b/contrib/libs/python/Include/bufferobject.h
deleted file mode 100644
index aed38f50a9..0000000000
--- a/contrib/libs/python/Include/bufferobject.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#error "No <bufferobject.h> in Python3"
-#else
-#include <contrib/tools/python/src/Include/bufferobject.h>
-#endif
diff --git a/contrib/libs/python/Include/cellobject.h b/contrib/libs/python/Include/cellobject.h
deleted file mode 100644
index 3345daa7fd..0000000000
--- a/contrib/libs/python/Include/cellobject.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/cellobject.h>
-#else
-#include <contrib/tools/python/src/Include/cellobject.h>
-#endif
diff --git a/contrib/libs/python/Include/ceval.h b/contrib/libs/python/Include/ceval.h
deleted file mode 100644
index f169fdbe79..0000000000
--- a/contrib/libs/python/Include/ceval.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/ceval.h>
-#else
-#include <contrib/tools/python/src/Include/ceval.h>
-#endif
diff --git a/contrib/libs/python/Include/classobject.h b/contrib/libs/python/Include/classobject.h
deleted file mode 100644
index 6f7a4f5e6e..0000000000
--- a/contrib/libs/python/Include/classobject.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/classobject.h>
-#else
-#include <contrib/tools/python/src/Include/classobject.h>
-#endif
diff --git a/contrib/libs/python/Include/cobject.h b/contrib/libs/python/Include/cobject.h
deleted file mode 100644
index 8fd2754e01..0000000000
--- a/contrib/libs/python/Include/cobject.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#error "No <cobject.h> in Python3"
-#else
-#include <contrib/tools/python/src/Include/cobject.h>
-#endif
diff --git a/contrib/libs/python/Include/codecs.h b/contrib/libs/python/Include/codecs.h
deleted file mode 100644
index 52f76040fb..0000000000
--- a/contrib/libs/python/Include/codecs.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/codecs.h>
-#else
-#include <contrib/tools/python/src/Include/codecs.h>
-#endif
diff --git a/contrib/libs/python/Include/complexobject.h b/contrib/libs/python/Include/complexobject.h
deleted file mode 100644
index 2c510c47f4..0000000000
--- a/contrib/libs/python/Include/complexobject.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/complexobject.h>
-#else
-#include <contrib/tools/python/src/Include/complexobject.h>
-#endif
diff --git a/contrib/libs/python/Include/dictobject.h b/contrib/libs/python/Include/dictobject.h
deleted file mode 100644
index 36026b4962..0000000000
--- a/contrib/libs/python/Include/dictobject.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/dictobject.h>
-#else
-#include <contrib/tools/python/src/Include/dictobject.h>
-#endif
diff --git a/contrib/libs/python/Include/fileobject.h b/contrib/libs/python/Include/fileobject.h
deleted file mode 100644
index ac3aa4c7a2..0000000000
--- a/contrib/libs/python/Include/fileobject.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/fileobject.h>
-#else
-#include <contrib/tools/python/src/Include/fileobject.h>
-#endif
diff --git a/contrib/libs/python/Include/floatobject.h b/contrib/libs/python/Include/floatobject.h
deleted file mode 100644
index d08083f632..0000000000
--- a/contrib/libs/python/Include/floatobject.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/floatobject.h>
-#else
-#include <contrib/tools/python/src/Include/floatobject.h>
-#endif
diff --git a/contrib/libs/python/Include/funcobject.h b/contrib/libs/python/Include/funcobject.h
deleted file mode 100644
index d0bde3deb4..0000000000
--- a/contrib/libs/python/Include/funcobject.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/funcobject.h>
-#else
-#include <contrib/tools/python/src/Include/funcobject.h>
-#endif
diff --git a/contrib/libs/python/Include/import.h b/contrib/libs/python/Include/import.h
deleted file mode 100644
index cfa6515cdf..0000000000
--- a/contrib/libs/python/Include/import.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/import.h>
-#else
-#include <contrib/tools/python/src/Include/import.h>
-#endif
diff --git a/contrib/libs/python/Include/intobject.h b/contrib/libs/python/Include/intobject.h
deleted file mode 100644
index 4ec1b915df..0000000000
--- a/contrib/libs/python/Include/intobject.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#error "No <intobject.h> in Python3"
-#else
-#include <contrib/tools/python/src/Include/intobject.h>
-#endif
diff --git a/contrib/libs/python/Include/intrcheck.h b/contrib/libs/python/Include/intrcheck.h
deleted file mode 100644
index 68aabf6d48..0000000000
--- a/contrib/libs/python/Include/intrcheck.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/intrcheck.h>
-#else
-#include <contrib/tools/python/src/Include/intrcheck.h>
-#endif
diff --git a/contrib/libs/python/Include/iterobject.h b/contrib/libs/python/Include/iterobject.h
deleted file mode 100644
index 19b24e317a..0000000000
--- a/contrib/libs/python/Include/iterobject.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/iterobject.h>
-#else
-#include <contrib/tools/python/src/Include/iterobject.h>
-#endif
diff --git a/contrib/libs/python/Include/listobject.h b/contrib/libs/python/Include/listobject.h
deleted file mode 100644
index e16f38f988..0000000000
--- a/contrib/libs/python/Include/listobject.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/listobject.h>
-#else
-#include <contrib/tools/python/src/Include/listobject.h>
-#endif
diff --git a/contrib/libs/python/Include/longobject.h b/contrib/libs/python/Include/longobject.h
deleted file mode 100644
index 18760d63cc..0000000000
--- a/contrib/libs/python/Include/longobject.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/longobject.h>
-#else
-#include <contrib/tools/python/src/Include/longobject.h>
-#endif
diff --git a/contrib/libs/python/Include/methodobject.h b/contrib/libs/python/Include/methodobject.h
deleted file mode 100644
index 12ff79b2e2..0000000000
--- a/contrib/libs/python/Include/methodobject.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/methodobject.h>
-#else
-#include <contrib/tools/python/src/Include/methodobject.h>
-#endif
diff --git a/contrib/libs/python/Include/modsupport.h b/contrib/libs/python/Include/modsupport.h
deleted file mode 100644
index 61dae25ba3..0000000000
--- a/contrib/libs/python/Include/modsupport.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/modsupport.h>
-#else
-#include <contrib/tools/python/src/Include/modsupport.h>
-#endif
diff --git a/contrib/libs/python/Include/moduleobject.h b/contrib/libs/python/Include/moduleobject.h
deleted file mode 100644
index d138ab73ca..0000000000
--- a/contrib/libs/python/Include/moduleobject.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/moduleobject.h>
-#else
-#include <contrib/tools/python/src/Include/moduleobject.h>
-#endif
diff --git a/contrib/libs/python/Include/object.h b/contrib/libs/python/Include/object.h
deleted file mode 100644
index 1a7e8a96bd..0000000000
--- a/contrib/libs/python/Include/object.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/object.h>
-#else
-#include <contrib/tools/python/src/Include/object.h>
-#endif
diff --git a/contrib/libs/python/Include/objimpl.h b/contrib/libs/python/Include/objimpl.h
deleted file mode 100644
index d33a4815a5..0000000000
--- a/contrib/libs/python/Include/objimpl.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/objimpl.h>
-#else
-#include <contrib/tools/python/src/Include/objimpl.h>
-#endif
diff --git a/contrib/libs/python/Include/patchlevel.h b/contrib/libs/python/Include/patchlevel.h
deleted file mode 100644
index 75ce0b8f9a..0000000000
--- a/contrib/libs/python/Include/patchlevel.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/patchlevel.h>
-#else
-#include <contrib/tools/python/src/Include/patchlevel.h>
-#endif
diff --git a/contrib/libs/python/Include/pydebug.h b/contrib/libs/python/Include/pydebug.h
deleted file mode 100644
index c20724196b..0000000000
--- a/contrib/libs/python/Include/pydebug.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#error "No <pydebug.h> in Python3"
-#else
-#include <contrib/tools/python/src/Include/pydebug.h>
-#endif
diff --git a/contrib/libs/python/Include/pyerrors.h b/contrib/libs/python/Include/pyerrors.h
deleted file mode 100644
index 587690a2b2..0000000000
--- a/contrib/libs/python/Include/pyerrors.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/pyerrors.h>
-#else
-#include <contrib/tools/python/src/Include/pyerrors.h>
-#endif
diff --git a/contrib/libs/python/Include/pyfpe.h b/contrib/libs/python/Include/pyfpe.h
deleted file mode 100644
index bafbbb8cf3..0000000000
--- a/contrib/libs/python/Include/pyfpe.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#error "No <pyfpe.h> in Python3"
-#else
-#include <contrib/tools/python/src/Include/pyfpe.h>
-#endif
diff --git a/contrib/libs/python/Include/pyport.h b/contrib/libs/python/Include/pyport.h
deleted file mode 100644
index a32beac0c1..0000000000
--- a/contrib/libs/python/Include/pyport.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/pyport.h>
-#else
-#include <contrib/tools/python/src/Include/pyport.h>
-#endif
diff --git a/contrib/libs/python/Include/pythonrun.h b/contrib/libs/python/Include/pythonrun.h
deleted file mode 100644
index 381610c54e..0000000000
--- a/contrib/libs/python/Include/pythonrun.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/pythonrun.h>
-#else
-#include <contrib/tools/python/src/Include/pythonrun.h>
-#endif
diff --git a/contrib/libs/python/Include/rangeobject.h b/contrib/libs/python/Include/rangeobject.h
deleted file mode 100644
index dc0b4a219b..0000000000
--- a/contrib/libs/python/Include/rangeobject.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/rangeobject.h>
-#else
-#include <contrib/tools/python/src/Include/rangeobject.h>
-#endif
diff --git a/contrib/libs/python/Include/sliceobject.h b/contrib/libs/python/Include/sliceobject.h
deleted file mode 100644
index b124a7a15b..0000000000
--- a/contrib/libs/python/Include/sliceobject.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/sliceobject.h>
-#else
-#include <contrib/tools/python/src/Include/sliceobject.h>
-#endif
diff --git a/contrib/libs/python/Include/stringobject.h b/contrib/libs/python/Include/stringobject.h
deleted file mode 100644
index 374c66667b..0000000000
--- a/contrib/libs/python/Include/stringobject.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#error "No <stringobject.h> in Python3"
-#else
-#include <contrib/tools/python/src/Include/stringobject.h>
-#endif
diff --git a/contrib/libs/python/Include/sysmodule.h b/contrib/libs/python/Include/sysmodule.h
deleted file mode 100644
index 6b50a48c2d..0000000000
--- a/contrib/libs/python/Include/sysmodule.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/sysmodule.h>
-#else
-#include <contrib/tools/python/src/Include/sysmodule.h>
-#endif
diff --git a/contrib/libs/python/Include/tupleobject.h b/contrib/libs/python/Include/tupleobject.h
deleted file mode 100644
index 8b924b9b4c..0000000000
--- a/contrib/libs/python/Include/tupleobject.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/tupleobject.h>
-#else
-#include <contrib/tools/python/src/Include/tupleobject.h>
-#endif
diff --git a/contrib/libs/python/Include/weakrefobject.h b/contrib/libs/python/Include/weakrefobject.h
deleted file mode 100644
index 3fed3fa764..0000000000
--- a/contrib/libs/python/Include/weakrefobject.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#ifdef USE_PYTHON3
-#include <contrib/tools/python3/src/Include/weakrefobject.h>
-#else
-#include <contrib/tools/python/src/Include/weakrefobject.h>
-#endif