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(#26) r=mmentovai. git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@26 4c0a9323-5329-0410-9bdc-e9ce6186880e
92 lines
2.7 KiB
C++
92 lines
2.7 KiB
C++
// 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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#include "processor/source_line_resolver.h"
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#include "google/symbol_supplier.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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SymbolSupplier* supplier, void* supplier_data)
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: memory_(memory),
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modules_(modules),
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supplier_(supplier),
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supplier_data_(supplier_data) {
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}
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void Stackwalker::Walk(StackFrames *frames) {
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frames->clear();
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SourceLineResolver resolver;
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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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if (modules_ && supplier_) {
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string symbol_file =
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supplier_->GetSymbolFile(module, supplier_data_);
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if (!symbol_file.empty()) {
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resolver.LoadModule(*(module->GetName()), symbol_file);
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resolver.FillSourceLineInfo(frame.get());
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}
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}
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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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}
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} // namespace google_airbag
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