The Tor Browser: comparison toolkit/crashreporter/google-breakpad/src/processor/simple_symbol

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+// Copyright (c) 2006, 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.
+// simple_symbol_supplier.cc: A simple SymbolSupplier implementation
+//
+// See simple_symbol_supplier.h for documentation.
+//
+// Author: Mark Mentovai
+#include "processor/simple_symbol_supplier.h"
+#include <assert.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <algorithm>
+#include <iostream>
+#include <fstream>
+#include "common/using_std_string.h"
+#include "google_breakpad/processor/code_module.h"
+#include "google_breakpad/processor/system_info.h"
+#include "processor/logging.h"
+#include "processor/pathname_stripper.h"
+namespace google_breakpad {
+static bool file_exists(const string &file_name) {
+struct stat sb;
+return stat(file_name.c_str(), &sb) == 0;
+}
+SymbolSupplier::SymbolResult SimpleSymbolSupplier::GetSymbolFile(
+const CodeModule *module, const SystemInfo *system_info,
+string *symbol_file) {
+BPLOG_IF(ERROR, !symbol_file) << "SimpleSymbolSupplier::GetSymbolFile "
+"requires |symbol_file|";
+assert(symbol_file);
+symbol_file->clear();
+for (unsigned int path_index = 0; path_index < paths_.size(); ++path_index) {
+SymbolResult result;
+if ((result = GetSymbolFileAtPathFromRoot(module, system_info,
+paths_[path_index],
+symbol_file)) != NOT_FOUND) {
+return result;
+}
+}
+return NOT_FOUND;
+}
+SymbolSupplier::SymbolResult SimpleSymbolSupplier::GetSymbolFile(
+const CodeModule *module,
+const SystemInfo *system_info,
+string *symbol_file,
+string *symbol_data) {
+assert(symbol_data);
+symbol_data->clear();
+SymbolSupplier::SymbolResult s = GetSymbolFile(module, system_info, symbol_file);
+if (s == FOUND) {
+std::ifstream in(symbol_file->c_str());
+std::getline(in, *symbol_data, string::traits_type::to_char_type(
+string::traits_type::eof()));
+in.close();
+}
+return s;
+}
+SymbolSupplier::SymbolResult SimpleSymbolSupplier::GetCStringSymbolData(
+const CodeModule *module,
+const SystemInfo *system_info,
+string *symbol_file,
+char **symbol_data) {
+assert(symbol_data);
+string symbol_data_string;
+SymbolSupplier::SymbolResult s =
+GetSymbolFile(module, system_info, symbol_file, &symbol_data_string);
+if (s == FOUND) {
+unsigned int size = symbol_data_string.size() + 1;
+*symbol_data = new char[size];
+if (*symbol_data == NULL) {
+BPLOG(ERROR) << "Memory allocation for size " << size << " failed";
+return INTERRUPT;
+}
+memcpy(*symbol_data, symbol_data_string.c_str(), size - 1);
+(*symbol_data)[size - 1] = '\0';
+memory_buffers_.insert(make_pair(module->code_file(), *symbol_data));
+}
+return s;
+}
+void SimpleSymbolSupplier::FreeSymbolData(const CodeModule *module) {
+if (!module) {
+BPLOG(INFO) << "Cannot free symbol data buffer for NULL module";
+return;
+}
+map<string, char *>::iterator it = memory_buffers_.find(module->code_file());
+if (it == memory_buffers_.end()) {
+BPLOG(INFO) << "Cannot find symbol data buffer for module "
+<< module->code_file();
+return;
+}
+delete [] it->second;
+memory_buffers_.erase(it);
+}
+SymbolSupplier::SymbolResult SimpleSymbolSupplier::GetSymbolFileAtPathFromRoot(
+const CodeModule *module, const SystemInfo *system_info,
+const string &root_path, string *symbol_file) {
+BPLOG_IF(ERROR, !symbol_file) << "SimpleSymbolSupplier::GetSymbolFileAtPath "
+"requires |symbol_file|";
+assert(symbol_file);
+symbol_file->clear();
+if (!module)
+return NOT_FOUND;
+// Start with the base path.
+string path = root_path;
+// Append the debug (pdb) file name as a directory name.
+path.append("/");
+string debug_file_name = PathnameStripper::File(module->debug_file());
+if (debug_file_name.empty()) {
+BPLOG(ERROR) << "Can't construct symbol file path without debug_file "
+"(code_file = " <<
+PathnameStripper::File(module->code_file()) << ")";
+return NOT_FOUND;
+}
+path.append(debug_file_name);
+// Append the identifier as a directory name.
+path.append("/");
+string identifier = module->debug_identifier();
+if (identifier.empty()) {
+BPLOG(ERROR) << "Can't construct symbol file path without debug_identifier "
+"(code_file = " <<
+PathnameStripper::File(module->code_file()) <<
+", debug_file = " << debug_file_name << ")";
+return NOT_FOUND;
+}
+path.append(identifier);
+// Transform the debug file name into one ending in .sym.  If the existing
+// name ends in .pdb, strip the .pdb.  Otherwise, add .sym to the non-.pdb
+// name.
+path.append("/");
+string debug_file_extension;
+if (debug_file_name.size() > 4)
+debug_file_extension = debug_file_name.substr(debug_file_name.size() - 4);
+std::transform(debug_file_extension.begin(), debug_file_extension.end(),
+debug_file_extension.begin(), tolower);
+if (debug_file_extension == ".pdb") {
+path.append(debug_file_name.substr(0, debug_file_name.size() - 4));
+} else {
+path.append(debug_file_name);
+}
+path.append(".sym");
+if (!file_exists(path)) {
+BPLOG(INFO) << "No symbol file at " << path;
+return NOT_FOUND;
+}
+*symbol_file = path;
+return FOUND;
+}
+}  // namespace google_breakpad

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toolkit/crashreporter/google-breakpad/src/processor/simple_symbol_supplier.cc