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/*
* Copyright 2019 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "rtc_base/system/thread_registry.h"
#include <map>
#include <utility>
#include "absl/base/attributes.h"
#include "rtc_base/logging.h"
#include "rtc_base/platform_thread_types.h"
#include "rtc_base/synchronization/mutex.h"
#include "sdk/android/native_api/stacktrace/stacktrace.h"
namespace webrtc {
namespace {
struct ThreadData {
const rtc::PlatformThreadId thread_id;
const rtc::Location location;
};
// The map of registered threads, and the lock that protects it. We create the
// map on first use, and never destroy it.
ABSL_CONST_INIT GlobalMutex g_thread_registry_lock(absl::kConstInit);
ABSL_CONST_INIT std::map<const ScopedRegisterThreadForDebugging*, ThreadData>*
g_registered_threads = nullptr;
} // namespace
ScopedRegisterThreadForDebugging::ScopedRegisterThreadForDebugging(
rtc::Location location) {
GlobalMutexLock gls(&g_thread_registry_lock);
if (g_registered_threads == nullptr) {
g_registered_threads =
new std::map<const ScopedRegisterThreadForDebugging*, ThreadData>();
}
const auto result = g_registered_threads->insert(
std::make_pair(this, ThreadData{rtc::CurrentThreadId(), location}));
RTC_DCHECK(result.second); // Insertion succeeded without collisions.
}
ScopedRegisterThreadForDebugging::~ScopedRegisterThreadForDebugging() {
GlobalMutexLock gls(&g_thread_registry_lock);
RTC_DCHECK(g_registered_threads != nullptr);
const int num_erased = g_registered_threads->erase(this);
RTC_DCHECK_EQ(num_erased, 1);
}
void PrintStackTracesOfRegisteredThreads() {
GlobalMutexLock gls(&g_thread_registry_lock);
if (g_registered_threads == nullptr) {
return;
}
for (const auto& e : *g_registered_threads) {
const ThreadData& td = e.second;
RTC_LOG(LS_WARNING) << "Thread " << td.thread_id << " registered at "
<< td.location.ToString() << ":";
RTC_LOG(LS_WARNING) << StackTraceToString(GetStackTrace(td.thread_id));
}
}
} // namespace webrtc
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