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Diffstat (limited to 'toolkit/crashreporter/google-breakpad/src/processor/source_line_resolver_base.cc')
-rw-r--r-- | toolkit/crashreporter/google-breakpad/src/processor/source_line_resolver_base.cc | 341 |
1 files changed, 341 insertions, 0 deletions
diff --git a/toolkit/crashreporter/google-breakpad/src/processor/source_line_resolver_base.cc b/toolkit/crashreporter/google-breakpad/src/processor/source_line_resolver_base.cc new file mode 100644 index 000000000..6eff1f991 --- /dev/null +++ b/toolkit/crashreporter/google-breakpad/src/processor/source_line_resolver_base.cc @@ -0,0 +1,341 @@ +// 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), + corrupt_modules_(new ModuleSet), + 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_; + modules_ = NULL; + + // Delete the set of corrupt modules. + delete corrupt_modules_; + corrupt_modules_ = NULL; + + MemoryMap::iterator iter = memory_buffers_->begin(); + for (; iter != memory_buffers_->end(); ++iter) { + delete [] iter->second; + } + // Delete the map of memory buffers. + delete memory_buffers_; + memory_buffers_ = NULL; + + delete module_factory_; + module_factory_ = NULL; +} + +bool SourceLineResolverBase::ReadSymbolFile(const string &map_file, + char **symbol_data, + size_t *symbol_data_size) { + if (symbol_data == NULL || symbol_data_size == 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_size = file_size + 1; + *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; + size_t memory_buffer_size; + if (!ReadSymbolFile(map_file, &memory_buffer, &memory_buffer_size)) + return false; + + BPLOG(INFO) << "Read symbol file " << map_file << " succeeded"; + + bool load_result = LoadModuleUsingMemoryBuffer(module, memory_buffer, + memory_buffer_size); + + 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; + } + + size_t memory_buffer_size = map_buffer.size() + 1; + char *memory_buffer = new char[memory_buffer_size]; + 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, + memory_buffer_size); + + 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, + size_t memory_buffer_size) { + 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, memory_buffer_size)) { + BPLOG(ERROR) << "Too many error while parsing symbol data for module " + << module->code_file(); + // Returning false from here would be an indication that the symbols for + // this module are missing which would be wrong. Intentionally fall through + // and add the module to both the modules_ and the corrupt_modules_ lists. + assert(basic_module->IsCorrupt()); + } + + modules_->insert(make_pair(module->code_file(), basic_module)); + if (basic_module->IsCorrupt()) { + corrupt_modules_->insert(module->code_file()); + } + 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; + corrupt_modules_->erase(mod_iter->first); + 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(); +} + +bool SourceLineResolverBase::IsModuleCorrupt(const CodeModule *module) { + if (!module) + return false; + return corrupt_modules_->find(module->code_file()) != corrupt_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 |