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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,
size_t *symbol_data_size) {
assert(symbol_data);
assert(symbol_data_size);
string symbol_data_string;
SymbolSupplier::SymbolResult s =
GetSymbolFile(module, system_info, symbol_file, &symbol_data_string);
if (s == FOUND) {
*symbol_data_size = symbol_data_string.size() + 1;
*symbol_data = new char[*symbol_data_size];
if (*symbol_data == NULL) {
BPLOG(ERROR) << "Memory allocation for size " << *symbol_data_size
<< " failed";
return INTERRUPT;
}
memcpy(*symbol_data, symbol_data_string.c_str(), symbol_data_string.size());
(*symbol_data)[symbol_data_string.size()] = '\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