// Copyright (c) 2012 Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Implementation of StackFrameSymbolizer, which encapsulates the logic of how
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// SourceLineResolverInterface interacts with SymbolSupplier to fill source
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// line information in a stack frame, and also looks up WindowsFrameInfo or
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// CFIFrameInfo for a stack frame.
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#include "google_breakpad/processor/stack_frame_symbolizer.h"
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#include <assert.h>
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#include "common/scoped_ptr.h"
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#include "google_breakpad/processor/code_module.h"
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#include "google_breakpad/processor/code_modules.h"
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#include "google_breakpad/processor/source_line_resolver_interface.h"
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#include "google_breakpad/processor/stack_frame.h"
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#include "google_breakpad/processor/symbol_supplier.h"
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#include "google_breakpad/processor/system_info.h"
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#include "processor/linked_ptr.h"
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#include "processor/logging.h"
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namespace google_breakpad {
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StackFrameSymbolizer::StackFrameSymbolizer(
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SymbolSupplier* supplier,
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SourceLineResolverInterface* resolver) : supplier_(supplier),
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resolver_(resolver) { }
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StackFrameSymbolizer::SymbolizerResult StackFrameSymbolizer::FillSourceLineInfo(
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const CodeModules* modules,
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const SystemInfo* system_info,
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StackFrame* frame) {
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assert(frame);
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if (!modules) return kError;
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const CodeModule* module = modules->GetModuleForAddress(frame->instruction);
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if (!module) return kError;
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frame->module = module;
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if (!resolver_) return kError; // no resolver.
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// If module is known to have missing symbol file, return.
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if (no_symbol_modules_.find(module->code_file()) !=
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no_symbol_modules_.end()) {
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return kError;
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}
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// If module is already loaded, go ahead to fill source line info and return.
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if (resolver_->HasModule(frame->module)) {
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resolver_->FillSourceLineInfo(frame);
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return resolver_->IsModuleCorrupt(frame->module) ?
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kWarningCorruptSymbols : kNoError;
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}
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// Module needs to fetch symbol file. First check to see if supplier exists.
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if (!supplier_) {
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return kError;
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}
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// Start fetching symbol from supplier.
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string symbol_file;
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char* symbol_data = NULL;
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size_t symbol_data_size;
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SymbolSupplier::SymbolResult symbol_result = supplier_->GetCStringSymbolData(
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module, system_info, &symbol_file, &symbol_data, &symbol_data_size);
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switch (symbol_result) {
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case SymbolSupplier::FOUND: {
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bool load_success = resolver_->LoadModuleUsingMemoryBuffer(
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frame->module,
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symbol_data,
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symbol_data_size);
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if (resolver_->ShouldDeleteMemoryBufferAfterLoadModule()) {
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supplier_->FreeSymbolData(module);
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}
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if (load_success) {
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resolver_->FillSourceLineInfo(frame);
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return resolver_->IsModuleCorrupt(frame->module) ?
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kWarningCorruptSymbols : kNoError;
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} else {
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BPLOG(ERROR) << "Failed to load symbol file in resolver.";
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no_symbol_modules_.insert(module->code_file());
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return kError;
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}
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}
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case SymbolSupplier::NOT_FOUND:
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no_symbol_modules_.insert(module->code_file());
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return kError;
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case SymbolSupplier::INTERRUPT:
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return kInterrupt;
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default:
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BPLOG(ERROR) << "Unknown SymbolResult enum: " << symbol_result;
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return kError;
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}
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return kError;
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}
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WindowsFrameInfo* StackFrameSymbolizer::FindWindowsFrameInfo(
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const StackFrame* frame) {
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return resolver_ ? resolver_->FindWindowsFrameInfo(frame) : NULL;
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}
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CFIFrameInfo* StackFrameSymbolizer::FindCFIFrameInfo(
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const StackFrame* frame) {
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return resolver_ ? resolver_->FindCFIFrameInfo(frame) : NULL;
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}
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} // namespace google_breakpad
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