mirror of
https://github.com/yuzu-emu/breakpad.git
synced 2025-10-09 17:27:11 +00:00
83e085b7a3
We've gotten mixed advice from the lawyery types about whether this matters. But it's easy enough to do. a=jimblandy, r=nealsid git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@517 4c0a9323-5329-0410-9bdc-e9ce6186880e
130 lines
4.5 KiB
C++
130 lines
4.5 KiB
C++
// 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_amd64.cc: amd64-specific stackwalker.
|
|
//
|
|
// See stackwalker_amd64.h for documentation.
|
|
//
|
|
// Author: Mark Mentovai, Ted Mielczarek
|
|
|
|
|
|
#include "processor/stackwalker_amd64.h"
|
|
#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"
|
|
|
|
namespace google_breakpad {
|
|
|
|
|
|
StackwalkerAMD64::StackwalkerAMD64(const SystemInfo *system_info,
|
|
const MDRawContextAMD64 *context,
|
|
MemoryRegion *memory,
|
|
const CodeModules *modules,
|
|
SymbolSupplier *supplier,
|
|
SourceLineResolverInterface *resolver)
|
|
: Stackwalker(system_info, memory, modules, supplier, resolver),
|
|
context_(context) {
|
|
}
|
|
|
|
|
|
StackFrame* StackwalkerAMD64::GetContextFrame() {
|
|
if (!context_ || !memory_) {
|
|
BPLOG(ERROR) << "Can't get context frame without context or memory";
|
|
return NULL;
|
|
}
|
|
|
|
StackFrameAMD64 *frame = new StackFrameAMD64();
|
|
|
|
// 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 = StackFrameAMD64::CONTEXT_VALID_ALL;
|
|
frame->instruction = frame->context.rip;
|
|
|
|
return frame;
|
|
}
|
|
|
|
|
|
StackFrame* StackwalkerAMD64::GetCallerFrame(const CallStack *stack) {
|
|
if (!memory_ || !stack) {
|
|
BPLOG(ERROR) << "Can't get caller frame without memory or stack";
|
|
return NULL;
|
|
}
|
|
|
|
StackFrameAMD64 *last_frame = static_cast<StackFrameAMD64*>(
|
|
stack->frames()->back());
|
|
|
|
//FIXME: this pretty much doesn't work at all due to FPO
|
|
// being enabled by default.
|
|
// Brain-dead stackwalking:
|
|
// %rip_new = *(%rbp_old + 8)
|
|
// %rsp_new = %rbp_old + 16
|
|
// %rbp_new = *(%rbp_old)
|
|
|
|
// 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.
|
|
u_int64_t stack_pointer = last_frame->context.rbp + 16;
|
|
if (stack_pointer <= last_frame->context.rsp) {
|
|
return NULL;
|
|
}
|
|
|
|
u_int64_t instruction;
|
|
if (!memory_->GetMemoryAtAddress(last_frame->context.rbp + 8,
|
|
&instruction) ||
|
|
instruction <= 1) {
|
|
return NULL;
|
|
}
|
|
|
|
u_int64_t stack_base;
|
|
if (!memory_->GetMemoryAtAddress(last_frame->context.rbp,
|
|
&stack_base) ||
|
|
stack_base <= 1) {
|
|
return NULL;
|
|
}
|
|
|
|
StackFrameAMD64 *frame = new StackFrameAMD64();
|
|
|
|
frame->context = last_frame->context;
|
|
frame->context.rip = instruction;
|
|
frame->context.rsp = stack_pointer;
|
|
frame->context.rbp = stack_base;
|
|
frame->context_validity = StackFrameAMD64::CONTEXT_VALID_RIP |
|
|
StackFrameAMD64::CONTEXT_VALID_RSP |
|
|
StackFrameAMD64::CONTEXT_VALID_RBP;
|
|
|
|
frame->instruction = frame->context.rip - 1;
|
|
|
|
return frame;
|
|
}
|
|
|
|
|
|
} // namespace google_breakpad
|