// Copyright (c) 2012 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #include "base/threading/platform_thread.h" #include #include #include #include #include #include "base/android/jni_android.h" #include "base/base_jni_headers/ThreadUtils_jni.h" #include "base/lazy_instance.h" #include "base/logging.h" #include "base/threading/platform_thread_internal_posix.h" #include "base/threading/thread_id_name_manager.h" #include "third_party/abseil-cpp/absl/types/optional.h" namespace base { namespace internal { // - kRealtimeAudio corresponds to Android's PRIORITY_AUDIO = -16 value. // - kDisplay corresponds to Android's PRIORITY_DISPLAY = -4 value. // - kBackground corresponds to Android's PRIORITY_BACKGROUND = 10 value and can // result in heavy throttling and force the thread onto a little core on // big.LITTLE devices. const ThreadPriorityToNiceValuePairForTest kThreadPriorityToNiceValueMapForTest[4] = { {ThreadPriorityForTest::kRealtimeAudio, -16}, {ThreadPriorityForTest::kDisplay, -4}, {ThreadPriorityForTest::kNormal, 0}, {ThreadPriorityForTest::kBackground, 10}, }; // - kBackground corresponds to Android's PRIORITY_BACKGROUND = 10 value and can // result in heavy throttling and force the thread onto a little core on // big.LITTLE devices. // - kCompositing and kDisplayCritical corresponds to Android's PRIORITY_DISPLAY // = -4 value. // - kRealtimeAudio corresponds to Android's PRIORITY_AUDIO = -16 value. const ThreadTypeToNiceValuePair kThreadTypeToNiceValueMap[6] = { {ThreadType::kBackground, 10}, {ThreadType::kResourceEfficient, 0}, {ThreadType::kDefault, 0}, {ThreadType::kCompositing, -4}, {ThreadType::kDisplayCritical, -4}, {ThreadType::kRealtimeAudio, -16}, }; bool CanSetThreadTypeToRealtimeAudio() { return true; } bool SetCurrentThreadTypeForPlatform(ThreadType thread_type, MessagePumpType pump_type_hint) { // On Android, we set the Audio priority through JNI as Audio priority // will also allow the process to run while it is backgrounded. if (thread_type == ThreadType::kRealtimeAudio) { JNIEnv* env = base::android::AttachCurrentThread(); Java_ThreadUtils_setThreadPriorityAudio(env, PlatformThread::CurrentId()); return true; } // Recent versions of Android (O+) up the priority of the UI thread // automatically. if (thread_type == ThreadType::kCompositing && pump_type_hint == MessagePumpType::UI && GetCurrentThreadNiceValue() <= ThreadTypeToNiceValue(ThreadType::kCompositing)) { return true; } return false; } absl::optional GetCurrentThreadPriorityForPlatformForTest() { JNIEnv* env = base::android::AttachCurrentThread(); if (Java_ThreadUtils_isThreadPriorityAudio( env, PlatformThread::CurrentId())) { return absl::make_optional(ThreadPriorityForTest::kRealtimeAudio); } return absl::nullopt; } } // namespace internal void PlatformThread::SetName(const std::string& name) { ThreadIdNameManager::GetInstance()->SetName(name); // Like linux, on android we can get the thread names to show up in the // debugger by setting the process name for the LWP. // We don't want to do this for the main thread because that would rename // the process, causing tools like killall to stop working. if (PlatformThread::CurrentId() == getpid()) return; // Set the name for the LWP (which gets truncated to 15 characters). int err = prctl(PR_SET_NAME, name.c_str()); if (err < 0 && errno != EPERM) DPLOG(ERROR) << "prctl(PR_SET_NAME)"; } void InitThreading() { } void TerminateOnThread() { base::android::DetachFromVM(); } size_t GetDefaultThreadStackSize(const pthread_attr_t& attributes) { #if !defined(ADDRESS_SANITIZER) return 0; #else // AddressSanitizer bloats the stack approximately 2x. Default stack size of // 1Mb is not enough for some tests (see http://crbug.com/263749 for example). return 2 * (1 << 20); // 2Mb #endif } } // namespace base