/thirdparty/breakpad/processor/source_line_resolver_base.cc
http://github.com/tomahawk-player/tomahawk · C++ · 311 lines · 208 code · 53 blank · 50 comment · 52 complexity · 95968702c56e949bbf4e053615ba0896 MD5 · raw file
- // 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.
- //
- // source_line_resolver_base.cc: Implementation of SourceLineResolverBase.
- //
- // See source_line_resolver_base.h and source_line_resolver_base_types.h for
- // more documentation.
- //
- // Author: Siyang Xie (lambxsy@google.com)
- #include <stdio.h>
- #include <string.h>
- #include <sys/stat.h>
- #include <map>
- #include <utility>
- #include "google_breakpad/processor/source_line_resolver_base.h"
- #include "processor/source_line_resolver_base_types.h"
- #include "processor/module_factory.h"
- using std::map;
- using std::make_pair;
- namespace google_breakpad {
- SourceLineResolverBase::SourceLineResolverBase(
- ModuleFactory *module_factory)
- : modules_(new ModuleMap),
- memory_buffers_(new MemoryMap),
- module_factory_(module_factory) {
- }
- SourceLineResolverBase::~SourceLineResolverBase() {
- ModuleMap::iterator it;
- // Iterate through ModuleMap and delete all loaded modules.
- for (it = modules_->begin(); it != modules_->end(); ++it) {
- // Delete individual module.
- delete it->second;
- }
- // Delete the map of modules.
- delete modules_;
- MemoryMap::iterator iter = memory_buffers_->begin();
- for (; iter != memory_buffers_->end(); ++iter) {
- delete [] iter->second;
- }
- // Delete the map of memory buffers.
- delete memory_buffers_;
- delete module_factory_;
- }
- bool SourceLineResolverBase::ReadSymbolFile(char **symbol_data,
- const string &map_file) {
- if (symbol_data == NULL) {
- BPLOG(ERROR) << "Could not Read file into Null memory pointer";
- return false;
- }
- struct stat buf;
- int error_code = stat(map_file.c_str(), &buf);
- if (error_code == -1) {
- string error_string;
- error_code = ErrnoString(&error_string);
- BPLOG(ERROR) << "Could not open " << map_file <<
- ", error " << error_code << ": " << error_string;
- return false;
- }
- off_t file_size = buf.st_size;
- // Allocate memory for file contents, plus a null terminator
- // since we may use strtok() on the contents.
- *symbol_data = new char[file_size + 1];
- if (*symbol_data == NULL) {
- BPLOG(ERROR) << "Could not allocate memory for " << map_file;
- return false;
- }
- BPLOG(INFO) << "Opening " << map_file;
- FILE *f = fopen(map_file.c_str(), "rt");
- if (!f) {
- string error_string;
- error_code = ErrnoString(&error_string);
- BPLOG(ERROR) << "Could not open " << map_file <<
- ", error " << error_code << ": " << error_string;
- delete [] (*symbol_data);
- *symbol_data = NULL;
- return false;
- }
- AutoFileCloser closer(f);
- int items_read = 0;
- items_read = fread(*symbol_data, 1, file_size, f);
- if (items_read != file_size) {
- string error_string;
- error_code = ErrnoString(&error_string);
- BPLOG(ERROR) << "Could not slurp " << map_file <<
- ", error " << error_code << ": " << error_string;
- delete [] (*symbol_data);
- *symbol_data = NULL;
- return false;
- }
- (*symbol_data)[file_size] = '\0';
- return true;
- }
- bool SourceLineResolverBase::LoadModule(const CodeModule *module,
- const string &map_file) {
- if (module == NULL)
- return false;
- // Make sure we don't already have a module with the given name.
- if (modules_->find(module->code_file()) != modules_->end()) {
- BPLOG(INFO) << "Symbols for module " << module->code_file()
- << " already loaded";
- return false;
- }
- BPLOG(INFO) << "Loading symbols for module " << module->code_file()
- << " from " << map_file;
- char *memory_buffer;
- if (!ReadSymbolFile(&memory_buffer, map_file))
- return false;
- BPLOG(INFO) << "Read symbol file " << map_file << " succeeded";
- bool load_result = LoadModuleUsingMemoryBuffer(module, memory_buffer);
- if (load_result && !ShouldDeleteMemoryBufferAfterLoadModule()) {
- // memory_buffer has to stay alive as long as the module.
- memory_buffers_->insert(make_pair(module->code_file(), memory_buffer));
- } else {
- delete [] memory_buffer;
- }
- return load_result;
- }
- bool SourceLineResolverBase::LoadModuleUsingMapBuffer(
- const CodeModule *module, const string &map_buffer) {
- if (module == NULL)
- return false;
- // Make sure we don't already have a module with the given name.
- if (modules_->find(module->code_file()) != modules_->end()) {
- BPLOG(INFO) << "Symbols for module " << module->code_file()
- << " already loaded";
- return false;
- }
- char *memory_buffer = new char[map_buffer.size() + 1];
- if (memory_buffer == NULL) {
- BPLOG(ERROR) << "Could not allocate memory for " << module->code_file();
- return false;
- }
- // Can't use strcpy, as the data may contain '\0's before the end.
- memcpy(memory_buffer, map_buffer.c_str(), map_buffer.size());
- memory_buffer[map_buffer.size()] = '\0';
- bool load_result = LoadModuleUsingMemoryBuffer(module, memory_buffer);
- if (load_result && !ShouldDeleteMemoryBufferAfterLoadModule()) {
- // memory_buffer has to stay alive as long as the module.
- memory_buffers_->insert(make_pair(module->code_file(), memory_buffer));
- } else {
- delete [] memory_buffer;
- }
- return load_result;
- }
- bool SourceLineResolverBase::LoadModuleUsingMemoryBuffer(
- const CodeModule *module, char *memory_buffer) {
- if (!module)
- return false;
- // Make sure we don't already have a module with the given name.
- if (modules_->find(module->code_file()) != modules_->end()) {
- BPLOG(INFO) << "Symbols for module " << module->code_file()
- << " already loaded";
- return false;
- }
- BPLOG(INFO) << "Loading symbols for module " << module->code_file()
- << " from memory buffer";
- Module *basic_module = module_factory_->CreateModule(module->code_file());
- // Ownership of memory is NOT transfered to Module::LoadMapFromMemory().
- if (!basic_module->LoadMapFromMemory(memory_buffer)) {
- delete basic_module;
- return false;
- }
- modules_->insert(make_pair(module->code_file(), basic_module));
- return true;
- }
- bool SourceLineResolverBase::ShouldDeleteMemoryBufferAfterLoadModule() {
- return true;
- }
- void SourceLineResolverBase::UnloadModule(const CodeModule *code_module) {
- if (!code_module)
- return;
- ModuleMap::iterator mod_iter = modules_->find(code_module->code_file());
- if (mod_iter != modules_->end()) {
- Module *symbol_module = mod_iter->second;
- delete symbol_module;
- modules_->erase(mod_iter);
- }
- if (ShouldDeleteMemoryBufferAfterLoadModule()) {
- // No-op. Because we never store any memory buffers.
- } else {
- // There may be a buffer stored locally, we need to find and delete it.
- MemoryMap::iterator iter = memory_buffers_->find(code_module->code_file());
- if (iter != memory_buffers_->end()) {
- delete [] iter->second;
- memory_buffers_->erase(iter);
- }
- }
- }
- bool SourceLineResolverBase::HasModule(const CodeModule *module) {
- if (!module)
- return false;
- return modules_->find(module->code_file()) != modules_->end();
- }
- void SourceLineResolverBase::FillSourceLineInfo(StackFrame *frame) {
- if (frame->module) {
- ModuleMap::const_iterator it = modules_->find(frame->module->code_file());
- if (it != modules_->end()) {
- it->second->LookupAddress(frame);
- }
- }
- }
- WindowsFrameInfo *SourceLineResolverBase::FindWindowsFrameInfo(
- const StackFrame *frame) {
- if (frame->module) {
- ModuleMap::const_iterator it = modules_->find(frame->module->code_file());
- if (it != modules_->end()) {
- return it->second->FindWindowsFrameInfo(frame);
- }
- }
- return NULL;
- }
- CFIFrameInfo *SourceLineResolverBase::FindCFIFrameInfo(
- const StackFrame *frame) {
- if (frame->module) {
- ModuleMap::const_iterator it = modules_->find(frame->module->code_file());
- if (it != modules_->end()) {
- return it->second->FindCFIFrameInfo(frame);
- }
- }
- return NULL;
- }
- bool SourceLineResolverBase::CompareString::operator()(
- const string &s1, const string &s2) const {
- return strcmp(s1.c_str(), s2.c_str()) < 0;
- }
- bool SourceLineResolverBase::Module::ParseCFIRuleSet(
- const string &rule_set, CFIFrameInfo *frame_info) const {
- CFIFrameInfoParseHandler handler(frame_info);
- CFIRuleParser parser(&handler);
- return parser.Parse(rule_set);
- }
- } // namespace google_breakpad