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//===-- sanitizer_common.cpp ----------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file is shared between sanitizers' run-time libraries.
//
//===----------------------------------------------------------------------===//
#include "sanitizer_stacktrace_printer.h"
#include "sanitizer_file.h"
#include "sanitizer_fuchsia.h"
namespace __sanitizer {
// sanitizer_symbolizer_markup.cpp implements these differently.
#if !SANITIZER_SYMBOLIZER_MARKUP
static const char *StripFunctionName(const char *function, const char *prefix) {
if (!function) return nullptr;
if (!prefix) return function;
uptr prefix_len = internal_strlen(prefix);
if (0 == internal_strncmp(function, prefix, prefix_len))
return function + prefix_len;
return function;
}
static const char *DemangleFunctionName(const char *function) {
if (!function) return nullptr;
// NetBSD uses indirection for old threading functions for historical reasons
// The mangled names are internal implementation detail and should not be
// exposed even in backtraces.
#if SANITIZER_NETBSD
if (!internal_strcmp(function, "__libc_mutex_init"))
return "pthread_mutex_init";
if (!internal_strcmp(function, "__libc_mutex_lock"))
return "pthread_mutex_lock";
if (!internal_strcmp(function, "__libc_mutex_trylock"))
return "pthread_mutex_trylock";
if (!internal_strcmp(function, "__libc_mutex_unlock"))
return "pthread_mutex_unlock";
if (!internal_strcmp(function, "__libc_mutex_destroy"))
return "pthread_mutex_destroy";
if (!internal_strcmp(function, "__libc_mutexattr_init"))
return "pthread_mutexattr_init";
if (!internal_strcmp(function, "__libc_mutexattr_settype"))
return "pthread_mutexattr_settype";
if (!internal_strcmp(function, "__libc_mutexattr_destroy"))
return "pthread_mutexattr_destroy";
if (!internal_strcmp(function, "__libc_cond_init"))
return "pthread_cond_init";
if (!internal_strcmp(function, "__libc_cond_signal"))
return "pthread_cond_signal";
if (!internal_strcmp(function, "__libc_cond_broadcast"))
return "pthread_cond_broadcast";
if (!internal_strcmp(function, "__libc_cond_wait"))
return "pthread_cond_wait";
if (!internal_strcmp(function, "__libc_cond_timedwait"))
return "pthread_cond_timedwait";
if (!internal_strcmp(function, "__libc_cond_destroy"))
return "pthread_cond_destroy";
if (!internal_strcmp(function, "__libc_rwlock_init"))
return "pthread_rwlock_init";
if (!internal_strcmp(function, "__libc_rwlock_rdlock"))
return "pthread_rwlock_rdlock";
if (!internal_strcmp(function, "__libc_rwlock_wrlock"))
return "pthread_rwlock_wrlock";
if (!internal_strcmp(function, "__libc_rwlock_tryrdlock"))
return "pthread_rwlock_tryrdlock";
if (!internal_strcmp(function, "__libc_rwlock_trywrlock"))
return "pthread_rwlock_trywrlock";
if (!internal_strcmp(function, "__libc_rwlock_unlock"))
return "pthread_rwlock_unlock";
if (!internal_strcmp(function, "__libc_rwlock_destroy"))
return "pthread_rwlock_destroy";
if (!internal_strcmp(function, "__libc_thr_keycreate"))
return "pthread_key_create";
if (!internal_strcmp(function, "__libc_thr_setspecific"))
return "pthread_setspecific";
if (!internal_strcmp(function, "__libc_thr_getspecific"))
return "pthread_getspecific";
if (!internal_strcmp(function, "__libc_thr_keydelete"))
return "pthread_key_delete";
if (!internal_strcmp(function, "__libc_thr_once"))
return "pthread_once";
if (!internal_strcmp(function, "__libc_thr_self"))
return "pthread_self";
if (!internal_strcmp(function, "__libc_thr_exit"))
return "pthread_exit";
if (!internal_strcmp(function, "__libc_thr_setcancelstate"))
return "pthread_setcancelstate";
if (!internal_strcmp(function, "__libc_thr_equal"))
return "pthread_equal";
if (!internal_strcmp(function, "__libc_thr_curcpu"))
return "pthread_curcpu_np";
if (!internal_strcmp(function, "__libc_thr_sigsetmask"))
return "pthread_sigmask";
#endif
return function;
}
static void MaybeBuildIdToBuffer(const AddressInfo &info, bool PrefixSpace,
InternalScopedString *buffer) {
if (info.uuid_size) {
if (PrefixSpace)
buffer->append(" ");
buffer->append("(BuildId: ");
for (uptr i = 0; i < info.uuid_size; ++i) {
buffer->append("%02x", info.uuid[i]);
}
buffer->append(")");
}
}
static const char kDefaultFormat[] = " #%n %p %F %L";
void RenderFrame(InternalScopedString *buffer, const char *format, int frame_no,
uptr address, const AddressInfo *info, bool vs_style,
const char *strip_path_prefix, const char *strip_func_prefix) {
// info will be null in the case where symbolization is not needed for the
// given format. This ensures that the code below will get a hard failure
// rather than print incorrect information in case RenderNeedsSymbolization
// ever ends up out of sync with this function. If non-null, the addresses
// should match.
CHECK(!info || address == info->address);
if (0 == internal_strcmp(format, "DEFAULT"))
format = kDefaultFormat;
for (const char *p = format; *p != '\0'; p++) {
if (*p != '%') {
buffer->append("%c", *p);
continue;
}
p++;
switch (*p) {
case '%':
buffer->append("%%");
break;
// Frame number and all fields of AddressInfo structure.
case 'n':
buffer->append("%u", frame_no);
break;
case 'p':
buffer->append("0x%zx", address);
break;
case 'm':
buffer->append("%s", StripPathPrefix(info->module, strip_path_prefix));
break;
case 'o':
buffer->append("0x%zx", info->module_offset);
break;
case 'b':
MaybeBuildIdToBuffer(*info, /*PrefixSpace=*/false, buffer);
break;
case 'f':
buffer->append("%s", DemangleFunctionName(StripFunctionName(
info->function, strip_func_prefix)));
break;
case 'q':
buffer->append("0x%zx", info->function_offset != AddressInfo::kUnknown
? info->function_offset
: 0x0);
break;
case 's':
buffer->append("%s", StripPathPrefix(info->file, strip_path_prefix));
break;
case 'l':
buffer->append("%d", info->line);
break;
case 'c':
buffer->append("%d", info->column);
break;
// Smarter special cases.
case 'F':
// Function name and offset, if file is unknown.
if (info->function) {
buffer->append("in %s", DemangleFunctionName(StripFunctionName(
info->function, strip_func_prefix)));
if (!info->file && info->function_offset != AddressInfo::kUnknown)
buffer->append("+0x%zx", info->function_offset);
}
break;
case 'S':
// File/line information.
RenderSourceLocation(buffer, info->file, info->line, info->column,
vs_style, strip_path_prefix);
break;
case 'L':
// Source location, or module location.
if (info->file) {
RenderSourceLocation(buffer, info->file, info->line, info->column,
vs_style, strip_path_prefix);
} else if (info->module) {
RenderModuleLocation(buffer, info->module, info->module_offset,
info->module_arch, strip_path_prefix);
MaybeBuildIdToBuffer(*info, /*PrefixSpace=*/true, buffer);
} else {
buffer->append("(<unknown module>)");
}
break;
case 'M':
// Module basename and offset, or PC.
if (address & kExternalPCBit) {
// There PCs are not meaningful.
} else if (info->module) {
// Always strip the module name for %M.
RenderModuleLocation(buffer, StripModuleName(info->module),
info->module_offset, info->module_arch, "");
MaybeBuildIdToBuffer(*info, /*PrefixSpace=*/true, buffer);
} else {
buffer->append("(%p)", (void *)address);
}
break;
default:
Report("Unsupported specifier in stack frame format: %c (%p)!\n", *p,
(void *)p);
Die();
}
}
}
bool RenderNeedsSymbolization(const char *format) {
if (0 == internal_strcmp(format, "DEFAULT"))
format = kDefaultFormat;
for (const char *p = format; *p != '\0'; p++) {
if (*p != '%')
continue;
p++;
switch (*p) {
case '%':
break;
case 'n':
// frame_no
break;
case 'p':
// address
break;
default:
return true;
}
}
return false;
}
void RenderData(InternalScopedString *buffer, const char *format,
const DataInfo *DI, const char *strip_path_prefix) {
for (const char *p = format; *p != '\0'; p++) {
if (*p != '%') {
buffer->append("%c", *p);
continue;
}
p++;
switch (*p) {
case '%':
buffer->append("%%");
break;
case 's':
buffer->append("%s", StripPathPrefix(DI->file, strip_path_prefix));
break;
case 'l':
buffer->append("%zu", DI->line);
break;
case 'g':
buffer->append("%s", DI->name);
break;
default:
Report("Unsupported specifier in stack frame format: %c (%p)!\n", *p,
(void *)p);
Die();
}
}
}
#endif // !SANITIZER_SYMBOLIZER_MARKUP
void RenderSourceLocation(InternalScopedString *buffer, const char *file,
int line, int column, bool vs_style,
const char *strip_path_prefix) {
if (vs_style && line > 0) {
buffer->append("%s(%d", StripPathPrefix(file, strip_path_prefix), line);
if (column > 0)
buffer->append(",%d", column);
buffer->append(")");
return;
}
buffer->append("%s", StripPathPrefix(file, strip_path_prefix));
if (line > 0) {
buffer->append(":%d", line);
if (column > 0)
buffer->append(":%d", column);
}
}
void RenderModuleLocation(InternalScopedString *buffer, const char *module,
uptr offset, ModuleArch arch,
const char *strip_path_prefix) {
buffer->append("(%s", StripPathPrefix(module, strip_path_prefix));
if (arch != kModuleArchUnknown) {
buffer->append(":%s", ModuleArchToString(arch));
}
buffer->append("+0x%zx)", offset);
}
} // namespace __sanitizer
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