Add contib/libs/breakpad to export

commit_hash:9d85255f8d9249f14105e4626bf4484805b8aed4

1 files changed, 146 insertions, 0 deletions

diff --git a/contrib/libs/breakpad/src/processor/stackwalker_sparc.cc b/contrib/libs/breakpad/src/processor/stackwalker_sparc.cc
new file mode 100644
index 0000000000..df58570d21
--- /dev/null
+++ b/contrib/libs/breakpad/src/processor/stackwalker_sparc.cc
@@ -0,0 +1,146 @@
+// Copyright (c) 2010 Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * 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.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "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 COPYRIGHT
+// OWNER OR CONTRIBUTORS 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.
+
+// stackwalker_sparc.cc: sparc-specific stackwalker.
+//
+// See stackwalker_sparc.h for documentation.
+//
+// Author: Michael Shang
+
+
+#include "google_breakpad/processor/call_stack.h"
+#include "google_breakpad/processor/memory_region.h"
+#include "google_breakpad/processor/stack_frame_cpu.h"
+#include "processor/logging.h"
+#include "processor/stackwalker_sparc.h"
+
+namespace google_breakpad {
+
+
+StackwalkerSPARC::StackwalkerSPARC(const SystemInfo* system_info,
+                                   const MDRawContextSPARC* context,
+                                   MemoryRegion* memory,
+                                   const CodeModules* modules,
+                                   StackFrameSymbolizer* resolver_helper)
+    : Stackwalker(system_info, memory, modules, resolver_helper),
+      context_(context) {
+}
+
+
+StackFrame* StackwalkerSPARC::GetContextFrame() {
+  if (!context_) {
+    BPLOG(ERROR) << "Can't get context frame without context";
+    return NULL;
+  }
+
+  StackFrameSPARC* frame = new StackFrameSPARC();
+
+  // The instruction pointer is stored directly in a register, so pull it
+  // straight out of the CPU context structure.
+  frame->context = *context_;
+  frame->context_validity = StackFrameSPARC::CONTEXT_VALID_ALL;
+  frame->trust = StackFrame::FRAME_TRUST_CONTEXT;
+  frame->instruction = frame->context.pc;
+
+  return frame;
+}
+
+
+StackFrame* StackwalkerSPARC::GetCallerFrame(const CallStack* stack,
+                                             bool stack_scan_allowed) {
+  if (!memory_ || !stack) {
+    BPLOG(ERROR) << "Can't get caller frame without memory or stack";
+    return NULL;
+  }
+
+  StackFrameSPARC* last_frame = static_cast<StackFrameSPARC*>(
+      stack->frames()->back());
+
+  // new: caller
+  // old: callee
+  // %fp, %i6 and g_r[30] is the same, see minidump_format.h
+  // %sp, %o6 and g_r[14] is the same, see minidump_format.h
+  // %sp_new = %fp_old
+  // %fp_new = *(%fp_old + 32 + 32 - 8), where the callee's %i6
+  // %pc_new = *(%fp_old + 32 + 32 - 4) + 8
+  // which is callee's %i7 plus 8
+
+  // A caller frame must reside higher in memory than its callee frames.
+  // Anything else is an error, or an indication that we've reached the
+  // end of the stack.
+  uint64_t stack_pointer = last_frame->context.g_r[30];
+  if (stack_pointer <= last_frame->context.g_r[14]) {
+    return NULL;
+  }
+
+  uint32_t instruction;
+  if (!memory_->GetMemoryAtAddress(stack_pointer + 60,
+                     &instruction) || instruction <= 1) {
+    return NULL;
+  }
+
+  uint32_t stack_base;
+  if (!memory_->GetMemoryAtAddress(stack_pointer + 56,
+                     &stack_base) || stack_base <= 1) {
+    return NULL;
+  }
+
+  // Should we terminate the stack walk? (end-of-stack or broken invariant)
+  if (TerminateWalk(instruction, stack_pointer, last_frame->context.g_r[14],
+                    /*is_context_frame=*/last_frame->trust ==
+                        StackFrame::FRAME_TRUST_CONTEXT)) {
+    return NULL;
+  }
+
+  StackFrameSPARC* frame = new StackFrameSPARC();
+
+  frame->context = last_frame->context;
+  frame->context.g_r[14] = stack_pointer;
+  frame->context.g_r[30] = stack_base;
+
+  // frame->context.pc is the return address, which is 2 instruction
+  // past the branch that caused us to arrive at the callee, which are
+  // a CALL instruction then a NOP instruction.
+  // frame_ppc->instruction to 8 less than that.  Since all sparc
+  // instructions are 4 bytes wide, this is the address of the branch
+  // instruction.  This allows source line information to match up with the
+  // line that contains a function call.  Callers that require the exact
+  // return address value may access the %i7/g_r[31] field of StackFrameSPARC.
+  frame->context.pc = instruction + 8;
+  frame->instruction = instruction;
+  frame->context_validity = StackFrameSPARC::CONTEXT_VALID_PC |
+                            StackFrameSPARC::CONTEXT_VALID_SP |
+                            StackFrameSPARC::CONTEXT_VALID_FP;
+  frame->trust = StackFrame::FRAME_TRUST_FP;
+
+  return frame;
+}
+
+
+}  // namespace google_breakpad