blob: 3796830827d9568fa2cb1bf7bf5d04831cf2839a [file] [log] [blame]
// Copyright 2017 Google Inc. All Rights Reserved.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
#include "cobalt/h5vcc/h5vcc_crash_log.h"
#include <map>
#include <string>
#include "base/atomicops.h"
#include "base/memory/singleton.h"
#include "base/synchronization/lock.h"
// Unfortunately, the Starboard interface is still experimental and supported
// only on the PS4 for now.
#include "starboard/ps4/core_dump_handler.h"
#include "starboard/system.h"
namespace cobalt {
namespace h5vcc {
// We keep a global mapping of all registered logs. When a crash occurs, we
// will iterate through the mapping in this dictionary to extract all
// logged entries and write them to the system's crash logger via Starboard.
class CrashLogDictionary {
static CrashLogDictionary* GetInstance() {
return Singleton<CrashLogDictionary,
LeakySingletonTraits<CrashLogDictionary> >::get();
void SetString(const std::string& key, const std::string& value) {
base::AutoLock lock(mutex_);
// While the lock prevents contention between other calls to SetString(),
// the atomics guard against OnCrash(), which doesn't acquire |mutex_|, from
// accessing the data at the same time. In the case that OnCrash() is
// being called, we give up and skip adding the data.
if (base::subtle::Acquire_CompareAndSwap(&accessing_log_data_, 0, 1) == 0) {
string_log_map_[key] = value;
base::subtle::Release_Store(&accessing_log_data_, 0);
CrashLogDictionary() : accessing_log_data_(0) {
SbCoreDumpRegisterHandler(&CoreDumpHandler, this);
static void CoreDumpHandler(void* context) {
CrashLogDictionary* crash_log_dictionary =
void OnCrash() {
// Check that we're not already updating log data. If we are, we just
// give up and skip recording any crash data, but hopefully this is rare.
if (base::subtle::Acquire_CompareAndSwap(&accessing_log_data_, 0, 1) == 0) {
for (StringMap::const_iterator iter = string_log_map_.begin();
iter != string_log_map_.end(); ++iter) {
SbCoreDumpLogString(iter->first.c_str(), iter->second.c_str());
base::subtle::Release_Store(&accessing_log_data_, 0);
friend struct DefaultSingletonTraits<CrashLogDictionary>;
base::subtle::Atomic32 accessing_log_data_;
// It is possible for multiple threads to call the H5VCC interface at the
// same time, and they will all forward to this global singleton, so we
// use this mutex to protect against concurrent access.
base::Lock mutex_;
typedef std::map<std::string, std::string> StringMap;
// Keeps track of all string values to be logged when a crash occurs.
StringMap string_log_map_;
bool H5vccCrashLog::SetString(const std::string& key,
const std::string& value) {
// Forward the call to a global singleton so that we keep a consistent crash
// log globally.
CrashLogDictionary::GetInstance()->SetString(key, value);
return true;
} // namespace h5vcc
} // namespace cobalt