Audioflinger dumpsys cleanup (f94040fd) · Commits · e / os / android_frameworks_av

services/audioflinger/AudioFlinger.cpp

+169 −153

Original line number	Diff line number	Diff line
		@@ -26,9 +26,7 @@
		#include "Configuration.h"
		#include "AudioFlinger.h"

		//#define BUFLOG_NDEBUG 0
		#include <afutils/BufLog.h>
		#include <afutils/DumpTryLock.h>
		#include <afutils/FallibleLockGuard.h>
		#include <afutils/NBAIO_Tee.h>
		#include <afutils/Permission.h>
		#include <afutils/PropertyUtils.h>
		@@ -68,6 +66,7 @@
		// not needed with the includes above, added to prevent transitive include dependency.
		#include <chrono>
		#include <thread>
		#include <string_view>

		// ----------------------------------------------------------------------------

		@@ -86,6 +85,8 @@

		namespace android {

		using namespace std::string_view_literals;

		using ::android::base::StringPrintf;
		using aidl_utils::statusTFromBinderStatus;
		using media::IEffectClient;
		@@ -102,10 +103,10 @@ using com::android::media::permission::ValidatedAttributionSourceState;
		static const AudioHalVersionInfo kMaxAAudioPropertyDeviceHalVersion =
		AudioHalVersionInfo(AudioHalVersionInfo::Type::HIDL, 7, 1);

		static constexpr char kDeadlockedString[] = "AudioFlinger may be deadlocked\n";
		static constexpr char kHardwareLockedString[] = "Hardware lock is taken\n";
		static constexpr char kClientLockedString[] = "Client lock is taken\n";
		static constexpr char kNoEffectsFactory[] = "Effects Factory is absent\n";
		constexpr auto kDeadlockedString = "AudioFlinger may be deadlocked\n"sv;
		constexpr auto kHardwareLockedString = "Hardware lock is taken\n"sv;
		constexpr auto kClientLockedString = "Client lock is taken\n"sv;
		constexpr auto kNoEffectsFactory = "Effects Factory is absent\n"sv;

		static constexpr char kAudioServiceName[] = "audio";

		@@ -116,19 +117,26 @@ static const nsecs_t kMinGlobalEffectEnabletimeNs = seconds(7200);
		// Keep a strong reference to media.log service around forever.
		// The service is within our parent process so it can never die in a way that we could observe.
		// These two variables are const after initialization.
		static sp<IBinder> sMediaLogServiceAsBinder;
		static sp<IMediaLogService> sMediaLogService;

		static pthread_once_t sMediaLogOnce = PTHREAD_ONCE_INIT;

		static void sMediaLogInit()
		{
		sMediaLogServiceAsBinder = defaultServiceManager()->getService(String16("media.log"));
		auto sMediaLogServiceAsBinder = defaultServiceManager()->getService(String16("media.log"));
		if (sMediaLogServiceAsBinder != 0) {
		sMediaLogService = interface_cast<IMediaLogService>(sMediaLogServiceAsBinder);
		}
		}

		static int writeStr(int fd, std::string_view s) {
		return write(fd, s.data(), s.size());
		}

		static int writeStr(int fd, const String8& s) {
		return write(fd, s.c_str(), s.size());
		}

		static error::BinderResult<ValidatedAttributionSourceState>
		validateAttributionFromContextOrTrustedCaller(AttributionSourceState attr,
		const IPermissionProvider& provider) {
		@@ -738,10 +746,10 @@ AudioHwDevice* AudioFlinger::findSuitableHwDev_l(
		return NULL;
		}

		void AudioFlinger::dumpClients_ll(int fd, const Vector<String16>& args __unused)
		{
		void AudioFlinger::dumpClients_ll(int fd, bool dumpAllocators) {
		String8 result;

		if (dumpAllocators) {
		result.append("Client Allocators:\n");
		for (size_t i = 0; i < mClients.size(); ++i) {
		sp<Client> client = mClients.valueAt(i).promote();
		@@ -750,6 +758,7 @@ void AudioFlinger::dumpClients_ll(int fd, const Vector<String16>& args __unused)
		result.append(client->allocator().dump().c_str());
		}
		}
		}

		result.append("Notification Clients:\n");
		result.append(" pid uid name\n");
		@@ -770,12 +779,11 @@ void AudioFlinger::dumpClients_ll(int fd, const Vector<String16>& args __unused)
		result.appendFormat(" %7d %4d %7d %6u %s\n", r->mSessionid, r->mCnt, r->mPid,
		r->mUid, info->package.c_str());
		}
		write(fd, result.c_str(), result.size());
		writeStr(fd, result);
		}


		void AudioFlinger::dumpInternals_l(int fd, const Vector<String16>& args __unused)
		{
		void AudioFlinger::dumpInternals_l(int fd) {
		const size_t SIZE = 256;
		char buffer[SIZE];
		String8 result;
		@@ -783,7 +791,7 @@ void AudioFlinger::dumpInternals_l(int fd, const Vector<String16>& args __unused

		snprintf(buffer, SIZE, "Hardware status: %d\n", hardwareStatus);
		result.append(buffer);
		write(fd, result.c_str(), result.size());
		writeStr(fd, result);

		dprintf(fd, "Vibrator infos(size=%zu):\n", mAudioVibratorInfos.size());
		for (const auto& vibratorInfo : mAudioVibratorInfos) {
		@@ -793,8 +801,43 @@ void AudioFlinger::dumpInternals_l(int fd, const Vector<String16>& args __unused
		mBluetoothLatencyModesEnabled ? "" : "not ");
		}

		void AudioFlinger::dumpPermissionDenial(int fd, const Vector<String16>& args __unused)
		{
		void AudioFlinger::dumpStats(int fd) {
		// Dump binder stats
		dprintf(fd, "\nIAudioFlinger binder call profile:\n");
		writeStr(fd, getIAudioFlingerStatistics().dump());

		extern mediautils::MethodStatistics<int>& getIEffectStatistics();
		dprintf(fd, "\nIEffect binder call profile:\n");
		writeStr(fd, getIEffectStatistics().dump());

		// Automatically fetch HIDL or AIDL statistics.
		const std::string_view halType = (mDevicesFactoryHal->getHalVersion().getType() ==
		AudioHalVersionInfo::Type::HIDL)
		? METHOD_STATISTICS_MODULE_NAME_AUDIO_HIDL
		: METHOD_STATISTICS_MODULE_NAME_AUDIO_AIDL;
		const std::shared_ptr<std::vector<std::string>> halClassNames =
		mediautils::getStatisticsClassesForModule(halType);
		if (halClassNames) {
		for (const auto& className : *halClassNames) {
		auto stats = mediautils::getStatisticsForClass(className);
		if (stats) {
		dprintf(fd, "\n%s binder call profile:\n", className.c_str());
		writeStr(fd, stats->dump());
		}
		}
		}

		dprintf(fd, "\nTimeCheck:\n");
		writeStr(fd, mediautils::TimeCheck::toString());
		dprintf(fd, "\n");
		// dump mutex stats
		writeStr(fd, audio_utils::mutex::all_stats_to_string());
		// dump held mutexes
		writeStr(fd, audio_utils::mutex::all_threads_to_string());

		}

		void AudioFlinger::dumpPermissionDenial(int fd) {
		const size_t SIZE = 256;
		char buffer[SIZE];
		String8 result;
		@@ -803,52 +846,82 @@ void AudioFlinger::dumpPermissionDenial(int fd, const Vector<String16>& args __u
		IPCThreadState::self()->getCallingPid(),
		IPCThreadState::self()->getCallingUid());
		result.append(buffer);
		write(fd, result.c_str(), result.size());
		writeStr(fd, result);
		}

		static void dump_printHelp(int fd) {
		constexpr static auto helpStr =
		"AudioFlinger dumpsys help options\n"
		" -h/--help: Print this help text\n"
		" --hal: Include dump of audio hal\n"
		" --stats: Include call/lock/watchdog stats\n"
		" --effects: Include effect definitions\n"
		" --memory: Include memory dump\n"
		" -a/--all: Print all except --memory\n"sv;

		write(fd, helpStr.data(), helpStr.length());
		}

		status_t AudioFlinger::dump(int fd, const Vector<String16>& args)
		NO_THREAD_SAFETY_ANALYSIS // conditional try lock
		{
		using afutils::FallibleLockGuard;
		if (!dumpAllowed()) {
		dumpPermissionDenial(fd, args);
		} else {
		// get state of hardware lock
		const bool hardwareLocked = afutils::dumpTryLock(hardwareMutex());
		if (!hardwareLocked) {
		String8 result(kHardwareLockedString);
		write(fd, result.c_str(), result.size());
		} else {
		hardwareMutex().unlock();
		dumpPermissionDenial(fd);
		return NO_ERROR;
		}
		// Arg parsing
		struct {
		bool shouldDumpMem, shouldDumpStats, shouldDumpHal, shouldDumpEffects;
		} parsedArgs {}; // zero-init

		const bool locked = afutils::dumpTryLock(mutex());

		// failed to lock - AudioFlinger is probably deadlocked
		if (!locked) {
		String8 result(kDeadlockedString);
		write(fd, result.c_str(), result.size());
		for (const auto& arg : args) {
		const String8 utf8arg{arg};
		if (utf8arg == "-h" \|\| utf8arg == "--help") {
		dump_printHelp(fd);
		return NO_ERROR;
		}

		const bool clientLocked = afutils::dumpTryLock(clientMutex());
		if (!clientLocked) {
		String8 result(kClientLockedString);
		write(fd, result.c_str(), result.size());
		if (utf8arg == "-a" \|\| utf8arg == "--all") {
		parsedArgs.shouldDumpStats = true;
		parsedArgs.shouldDumpHal = true;
		parsedArgs.shouldDumpEffects = true;
		continue;
		}

		if (mEffectsFactoryHal != 0) {
		mEffectsFactoryHal->dumpEffects(fd);
		} else {
		String8 result(kNoEffectsFactory);
		write(fd, result.c_str(), result.size());
		if (utf8arg == "--hal") {
		parsedArgs.shouldDumpHal = true;
		continue;
		}
		if (utf8arg == "--stats") {
		parsedArgs.shouldDumpStats = true;
		continue;
		}
		if (utf8arg == "--effects") {
		parsedArgs.shouldDumpEffects = true;
		continue;
		}
		if (utf8arg == "--memory") {
		parsedArgs.shouldDumpMem = true;
		continue;
		}
		// Unknown arg silently ignored
		}

		dumpClients_ll(fd, args);
		if (clientLocked) {
		clientMutex().unlock();
		// get state of hardware lock
		{
		FallibleLockGuard l{hardwareMutex()};
		if (!l) writeStr(fd, kHardwareLockedString);
		}
		{
		FallibleLockGuard l{mutex()};
		if (!l) writeStr(fd, kDeadlockedString);
		{
		FallibleLockGuard ll{clientMutex()};
		if (!ll) writeStr(fd, kClientLockedString);
		dumpClients_ll(fd, parsedArgs.shouldDumpMem);
		}

		dumpInternals_l(fd, args);
		dumpInternals_l(fd);

		dprintf(fd, "\n ## BEGIN thread dump \n");
		// dump playback threads
		for (size_t i = 0; i < mPlaybackThreads.size(); i++) {
		mPlaybackThreads.valueAt(i)->dump(fd, args);
		@@ -866,25 +939,18 @@ NO_THREAD_SAFETY_ANALYSIS // conditional try lock

		// dump orphan effect chains
		if (mOrphanEffectChains.size() != 0) {
		write(fd, " Orphan Effect Chains\n", strlen(" Orphan Effect Chains\n"));
		writeStr(fd, " Orphan Effect Chains\n");
		for (size_t i = 0; i < mOrphanEffectChains.size(); i++) {
		mOrphanEffectChains.valueAt(i)->dump(fd, args);
		}
		}
		// dump all hardware devs
		for (size_t i = 0; i < mAudioHwDevs.size(); i++) {
		sp<DeviceHalInterface> dev = mAudioHwDevs.valueAt(i)->hwDevice();
		dev->dump(fd, args);
		}

		mPatchPanel->dump(fd);

		mDeviceEffectManager->dump(fd);

		std::string melOutput = mMelReporter->dump();
		write(fd, melOutput.c_str(), melOutput.size());
		// dump historical threads in the last 10 seconds
		writeStr(fd, mThreadLog.dumpToString(
		"Historical Thread Log ", 0 /* lines */,
		audio_utils_get_real_time_ns() - 10 * 60 * NANOS_PER_SECOND));

		// dump external setParameters
		dprintf(fd, "\n ## BEGIN setParameters dump \n");
		auto dumpLogger = [fd](SimpleLog& logger, const char* name) {
		dprintf(fd, "\n %s setParameters:\n", name);
		logger.dump(fd, " " /* prefix */);
		@@ -893,103 +959,53 @@ NO_THREAD_SAFETY_ANALYSIS // conditional try lock
		dumpLogger(mAppSetParameterLog, "App");
		dumpLogger(mSystemSetParameterLog, "System");

		// dump historical threads in the last 10 seconds
		const std::string threadLog = mThreadLog.dumpToString(
		"Historical Thread Log ", 0 /* lines */,
		audio_utils_get_real_time_ns() - 10 * 60 * NANOS_PER_SECOND);
		write(fd, threadLog.c_str(), threadLog.size());

		BUFLOG_RESET;
		dprintf(fd, "\n ## BEGIN misc af dump \n");
		mPatchPanel->dump(fd);
		mDeviceEffectManager->dump(fd);
		writeStr(fd, mMelReporter->dump());

		if (media::psh_utils::AudioPowerManager::enabled()) {
		char value[PROPERTY_VALUE_MAX];
		property_get("ro.build.display.id", value, "Unknown build");
		std::string build(value);
		build.append("\n");
		write(fd, build.c_str(), build.size());
		const std::string powerLog =
		media::psh_utils::AudioPowerManager::getAudioPowerManager().toString();
		write(fd, powerLog.c_str(), powerLog.size());
		writeStr(fd, build + "\n");
		writeStr(fd, media::psh_utils::AudioPowerManager::getAudioPowerManager().toString());
		}

		if (locked) {
		mutex().unlock();
		if (parsedArgs.shouldDumpEffects) {
		dprintf(fd, "\n ## BEGIN effects dump \n");
		if (mEffectsFactoryHal != 0) {
		mEffectsFactoryHal->dumpEffects(fd);
		} else {
		writeStr(fd, kNoEffectsFactory);
		}

		#ifdef TEE_SINK
		// NBAIO_Tee dump is safe to call outside of AF lock.
		NBAIO_Tee::dumpAll(fd, "_DUMP");
		#endif
		// append a copy of media.log here by forwarding fd to it, but don't attempt
		// to lookup the service if it's not running, as it will block for a second
		if (sMediaLogServiceAsBinder != 0) {
		dprintf(fd, "\nmedia.log:\n");
		sMediaLogServiceAsBinder->dump(fd, args);
		}

		// check for optional arguments
		bool dumpMem = false;
		bool unreachableMemory = false;
		for (const auto &arg : args) {
		if (arg == String16("-m")) {
		dumpMem = true;
		} else if (arg == String16("--unreachable")) {
		unreachableMemory = true;
		if (parsedArgs.shouldDumpHal) {
		dprintf(fd, "\n ## BEGIN HAL dump \n");
		FallibleLockGuard ll{hardwareMutex()};
		// dump all hardware devs
		for (size_t i = 0; i < mAudioHwDevs.size(); i++) {
		sp<DeviceHalInterface> dev = mAudioHwDevs.valueAt(i)->hwDevice();
		dev->dump(fd, args);
		}
		}
		} // end af lock

		if (dumpMem) {
		dprintf(fd, "\nDumping memory:\n");
		std::string s = dumpMemoryAddresses(100 /* limit */);
		write(fd, s.c_str(), s.size());
		if (parsedArgs.shouldDumpStats) {
		dprintf(fd, "\n ## BEGIN stats dump \n");
		dumpStats(fd);
		}
		if (unreachableMemory) {

		if (parsedArgs.shouldDumpMem) {
		dprintf(fd, "\n ## BEGIN memory dump \n");
		writeStr(fd, dumpMemoryAddresses(100 /* limit */));
		dprintf(fd, "\nDumping unreachable memory:\n");
		// TODO - should limit be an argument parameter?
		std::string s = GetUnreachableMemoryString(true /* contents /, 100 / limit */);
		write(fd, s.c_str(), s.size());
		}
		{
		std::string timeCheckStats = getIAudioFlingerStatistics().dump();
		dprintf(fd, "\nIAudioFlinger binder call profile:\n");
		write(fd, timeCheckStats.c_str(), timeCheckStats.size());

		extern mediautils::MethodStatistics<int>& getIEffectStatistics();
		timeCheckStats = getIEffectStatistics().dump();
		dprintf(fd, "\nIEffect binder call profile:\n");
		write(fd, timeCheckStats.c_str(), timeCheckStats.size());

		// Automatically fetch HIDL or AIDL statistics.
		const std::string_view halType = (mDevicesFactoryHal->getHalVersion().getType() ==
		AudioHalVersionInfo::Type::HIDL)
		? METHOD_STATISTICS_MODULE_NAME_AUDIO_HIDL
		: METHOD_STATISTICS_MODULE_NAME_AUDIO_AIDL;
		const std::shared_ptr<std::vector<std::string>> halClassNames =
		mediautils::getStatisticsClassesForModule(halType);
		if (halClassNames) {
		for (const auto& className : *halClassNames) {
		auto stats = mediautils::getStatisticsForClass(className);
		if (stats) {
		timeCheckStats = stats->dump();
		dprintf(fd, "\n%s binder call profile:\n", className.c_str());
		write(fd, timeCheckStats.c_str(), timeCheckStats.size());
		}
		}
		writeStr(fd, GetUnreachableMemoryString(true /* contents /, 100 / limit */));
		}

		timeCheckStats = mediautils::TimeCheck::toString();
		dprintf(fd, "\nTimeCheck:\n");
		write(fd, timeCheckStats.c_str(), timeCheckStats.size());
		dprintf(fd, "\n");
		}
		// dump mutex stats
		const auto mutexStats = audio_utils::mutex::all_stats_to_string();
		write(fd, mutexStats.c_str(), mutexStats.size());

		// dump held mutexes
		const auto mutexThreadInfo = audio_utils::mutex::all_threads_to_string();
		write(fd, mutexThreadInfo.c_str(), mutexThreadInfo.size());
		}
		return NO_ERROR;
		}

services/audioflinger/AudioFlinger.h

+4 −3

Original line number	Diff line number	Diff line
		@@ -469,9 +469,10 @@ private:
		// AudioFlinger::setParameters() updates with mutex().
		std::atomic_uint32_t mScreenState{};

		void dumpPermissionDenial(int fd, const Vector<String16>& args);
		void dumpClients_ll(int fd, const Vector<String16>& args) REQUIRES(mutex(), clientMutex());
		void dumpInternals_l(int fd, const Vector<String16>& args) REQUIRES(mutex());
		void dumpPermissionDenial(int fd);
		void dumpClients_ll(int fd, bool dumpAllocators) REQUIRES(mutex(), clientMutex());
		void dumpInternals_l(int fd) REQUIRES(mutex());
		void dumpStats(int fd);

		SimpleLog mThreadLog{16}; // 16 Thread history limit

services/audioflinger/DeviceEffectManager.cpp

+3 −8

Original line number	Diff line number	Diff line
		@@ -22,7 +22,7 @@

		#include "EffectConfiguration.h"

		#include <afutils/DumpTryLock.h>
		#include <afutils/FallibleLockGuard.h>
		#include <audio_utils/primitives.h>
		#include <media/audiohal/EffectsFactoryHalInterface.h>
		#include <utils/Log.h>
		@@ -208,10 +208,9 @@ status_t DeviceEffectManager::createEffectHal(
		}

		void DeviceEffectManager::dump(int fd)
		NO_THREAD_SAFETY_ANALYSIS // conditional try lock
		{
		const bool locked = afutils::dumpTryLock(mutex());
		if (!locked) {
		afutils::FallibleLockGuard l{mutex()};
		if (!l) {
		String8 result("DeviceEffectManager may be deadlocked\n");
		write(fd, result.c_str(), result.size());
		}
		@@ -227,10 +226,6 @@ NO_THREAD_SAFETY_ANALYSIS // conditional try lock
		effect->dump2(fd, 4);
		}
		}

		if (locked) {
		mutex().unlock();
		}
		}

		size_t DeviceEffectManager::removeEffect(const sp<IAfDeviceEffectProxy>& effect)

services/audioflinger/Effects.cpp

+71 −89

Original line number	Diff line number	Diff line
		@@ -24,7 +24,7 @@
		#include "Client.h"
		#include "EffectConfiguration.h"

		#include <afutils/DumpTryLock.h>
		#include <afutils/FallibleLockGuard.h>
		#include <audio_utils/channels.h>
		#include <audio_utils/primitives.h>
		#include <media/AudioCommonTypes.h>
		@@ -506,15 +506,15 @@ static String8 effectFlagsToString(uint32_t flags) {
		}

		void EffectBase::dump(int fd, const Vector<String16>& args __unused) const
		NO_THREAD_SAFETY_ANALYSIS // conditional try lock
		{
		String8 result;

		result.appendFormat("\tEffect ID %d:\n", mId);

		const bool locked = afutils::dumpTryLock(mutex());
		{
		afutils::FallibleLockGuard l{mutex()};
		// failed to lock - AudioFlinger is probably deadlocked
		if (!locked) {
		if (!l) {
		result.append("\t\tCould not lock Fx mutex:\n");
		}
		bool isInternal = isInternal_l();
		@@ -550,8 +550,6 @@ NO_THREAD_SAFETY_ANALYSIS // conditional try lock
		result.append(buffer);
		}
		}
		if (locked) {
		mutex().unlock();
		}

		write(fd, result.c_str(), result.length());
		@@ -1710,13 +1708,11 @@ static std::string dumpInOutBuffer(bool isInput, const sp<EffectBufferHalInterfa
		return ss.str();
		}

		void EffectModule::dump(int fd, const Vector<String16>& args) const
		NO_THREAD_SAFETY_ANALYSIS // conditional try lock
		{
		void EffectModule::dump(int fd, const Vector<String16>& args) const {
		EffectBase::dump(fd, args);

		String8 result;
		const bool locked = afutils::dumpTryLock(mutex());
		afutils::FallibleLockGuard l{mutex()};

		result.append("\t\tStatus Engine:\n");
		result.appendFormat("\t\t%03d %p\n",
		@@ -1758,9 +1754,6 @@ NO_THREAD_SAFETY_ANALYSIS // conditional try lock
		(void)mEffectInterface->dump(fd);
		}

		if (locked) {
		mutex().unlock();
		}
		}

		// ----------------------------------------------------------------------------
		@@ -2203,22 +2196,20 @@ void EffectHandle::framesProcessed(int32_t frames) const
		}

		void EffectHandle::dumpToBuffer(char* buffer, size_t size) const
		NO_THREAD_SAFETY_ANALYSIS // conditional try lock
		{
		const bool locked = mCblk != nullptr && afutils::dumpTryLock(mCblk->lock);
		std::optional<afutils::FallibleLockGuard> guard;
		if (mCblk != nullptr) {
		guard.emplace(mCblk->lock);
		}

		snprintf(buffer, size, "\t\t\t%5d %5d %3s %3s %5u %5u\n",
		(mClient == 0) ? getpid() : mClient->pid(),
		mPriority,
		mHasControl ? "yes" : "no",
		locked ? "yes" : "no",
		guard.has_value() && *guard ? "yes" : "no",
		mCblk ? mCblk->clientIndex : 0,
		mCblk ? mCblk->serverIndex : 0
		);

		if (locked) {
		mCblk->lock.unlock();
		}
		}

		#undef LOG_TAG
		@@ -2803,17 +2794,19 @@ void EffectChain::syncHalEffectsState_l()
		}

		void EffectChain::dump(int fd, const Vector<String16>& args) const
		NO_THREAD_SAFETY_ANALYSIS // conditional try lock
		{
		String8 result;

		afutils::FallibleLockGuard l{mutex()};
		const size_t numEffects = mEffects.size();
		result.appendFormat(" %zu effects for session %d\n", numEffects, mSessionId);
		if (numEffects == 0) {
		write(fd, result.c_str(), result.size());
		return;
		}


		if (numEffects) {
		const bool locked = afutils::dumpTryLock(mutex());
		// failed to lock - AudioFlinger is probably deadlocked
		if (!locked) {
		if (!l) {
		result.append("\tCould not lock mutex:\n");
		}

		@@ -2832,13 +2825,6 @@ NO_THREAD_SAFETY_ANALYSIS // conditional try lock
		effect->dump(fd, args);
		}
		}

		if (locked) {
		mutex().unlock();
		}
		} else {
		write(fd, result.c_str(), result.size());
		}
		}

		// must be called with IAfThreadBase::mutex() held
		@@ -3712,13 +3698,13 @@ uint32_t DeviceEffectProxy::channelCount() const {
		}

		void DeviceEffectProxy::dump2(int fd, int spaces) const
		NO_THREAD_SAFETY_ANALYSIS // conditional try lock
		{
		const Vector<String16> args;
		EffectBase::dump(fd, args);

		const bool locked = afutils::dumpTryLock(proxyMutex());
		if (!locked) {
		afutils::FallibleLockGuard l{proxyMutex()};

		if (!l) {
		String8 result("DeviceEffectProxy may be deadlocked\n");
		write(fd, result.c_str(), result.size());
		}
		@@ -3745,10 +3731,6 @@ NO_THREAD_SAFETY_ANALYSIS // conditional try lock
		effect->dump(fd, args);
		}
		}

		if (locked) {
		proxyMutex().unlock();
		}
		}

		#undef LOG_TAG

services/audioflinger/Threads.cpp

+10 −14

Original line number	Diff line number	Diff line
		@@ -27,7 +27,7 @@
		#include "MelReporter.h"
		#include "ResamplerBufferProvider.h"

		#include <afutils/DumpTryLock.h>
		#include <afutils/FallibleLockGuard.h>
		#include <afutils/Permission.h>
		#include <afutils/TypedLogger.h>
		#include <afutils/Vibrator.h>
		@@ -1042,23 +1042,19 @@ String8 channelMaskToString(audio_channel_mask_t mask, bool output) {
		}

		void ThreadBase::dump(int fd, const Vector<String16>& args)
		NO_THREAD_SAFETY_ANALYSIS // conditional try lock
		{
		dprintf(fd, "\n%s thread %p, name %s, tid %d, type %d (%s):\n", isOutput() ? "Output" : "Input",
		this, mThreadName, getTid(), type(), threadTypeToString(type()));

		const bool locked = afutils::dumpTryLock(mutex());
		if (!locked) {
		{
		afutils::FallibleLockGuard l{mutex()};
		if (!l) {
		dprintf(fd, " Thread may be deadlocked\n");
		}

		dumpBase_l(fd, args);
		dumpInternals_l(fd, args);
		dumpTracks_l(fd, args);
		dumpEffectChains_l(fd, args);

		if (locked) {
		mutex().unlock();
		}

		dprintf(fd, " Local log:\n");