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79 lines
2.2 KiB
C++
79 lines
2.2 KiB
C++
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// Copyright (C) 2006 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// stackwalker.cc: Generic stackwalker.
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//
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// See stackwalker.h for documentation.
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//
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// Author: Mark Mentovai
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#include <memory>
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#include "processor/stackwalker.h"
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#include "processor/minidump.h"
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namespace google_airbag {
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using std::auto_ptr;
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Stackwalker::Stackwalker(MemoryRegion* memory, MinidumpModuleList* modules)
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: memory_(memory), modules_(modules) {
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}
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StackFrames* Stackwalker::Walk() {
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auto_ptr<StackFrames> frames(new StackFrames());
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// Begin with the context frame, and keep getting callers until there are
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// no more.
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auto_ptr<StackFrame> frame(new StackFrame());
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bool valid = GetContextFrame(frame.get());
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while (valid) {
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// frame already contains a good frame with properly set instruction and
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// frame_pointer fields. The frame structure comes from either the
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// context frame (above) or a caller frame (below).
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// Resolve the module information, if a module map was provided.
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if (modules_) {
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MinidumpModule* module =
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modules_->GetModuleForAddress(frame->instruction);
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if (module) {
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frame->module_name = *(module->GetName());
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frame->module_base = module->base_address();
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}
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}
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// Copy the frame into the frames vector.
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frames->push_back(*frame);
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// Use a new object for the next frame, even though the old object was
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// copied. If StackFrame provided some sort of Clear() method, then
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// the same frame could be reused.
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frame.reset(new StackFrame());
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// Get the next frame.
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valid = GetCallerFrame(frame.get());
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}
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return frames.release();
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}
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} // namespace google_airbag
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