Merge changes I5cf0d014,Ib46f0646 am: 609630e7ba (d090042c) · Commits · e / os / android_system_core

logd/LogBuffer.h

+8 −9

Original line number	Original line	Diff line number	Diff line
	@@ -21,13 +21,11 @@
	#include <functional>		#include <functional>

	#include <log/log.h>		#include <log/log.h>
	#include <sysutils/SocketClient.h>		#include <log/log_read.h>

	#include "LogBufferElement.h"		#include "LogWriter.h"

	class LogWriter;		enum class FilterResult {

	enum class FlushToResult {
	kSkip,		kSkip,
	kStop,		kStop,
	kWrite,		kWrite,
	@@ -45,10 +43,11 @@ class LogBuffer {
	// valid message was from the same source so we can differentiate chatty		// valid message was from the same source so we can differentiate chatty
	// filter types (identical or expired)		// filter types (identical or expired)
	static const uint64_t FLUSH_ERROR = 0;		static const uint64_t FLUSH_ERROR = 0;
	virtual uint64_t FlushTo(		virtual uint64_t FlushTo(LogWriter* writer, uint64_t start,
	LogWriter* writer, uint64_t start,
	pid_t* last_tid, // nullable		pid_t* last_tid, // nullable
	const std::function<FlushToResult(const LogBufferElement* element)>& filter) = 0;		const std::function<FilterResult(log_id_t log_id, pid_t pid,
			uint64_t sequence, log_time realtime,
			uint16_t dropped_count)>& filter) = 0;

	virtual bool Clear(log_id_t id, uid_t uid) = 0;		virtual bool Clear(log_id_t id, uid_t uid) = 0;
	virtual unsigned long GetSize(log_id_t id) = 0;		virtual unsigned long GetSize(log_id_t id) = 0;

logd/LogReader.cpp

+15 −13

Original line number	Original line	Diff line number	Diff line
	@@ -171,27 +171,29 @@ bool LogReader::onDataAvailable(SocketClient* cli) {
	if (start != log_time::EPOCH) {		if (start != log_time::EPOCH) {
	bool start_time_set = false;		bool start_time_set = false;
	uint64_t last = sequence;		uint64_t last = sequence;
	auto log_find_start = [pid, logMask, start, &sequence, &start_time_set,		auto log_find_start = [pid, logMask, start, &sequence, &start_time_set, &last](
	&last](const LogBufferElement* element) -> FlushToResult {		log_id_t element_log_id, pid_t element_pid,
	if (pid && pid != element->getPid()) {		uint64_t element_sequence, log_time element_realtime,
	return FlushToResult::kSkip;		uint16_t) -> FilterResult {
			if (pid && pid != element_pid) {
			return FilterResult::kSkip;
	}		}
	if ((logMask & (1 << element->getLogId())) == 0) {		if ((logMask & (1 << element_log_id)) == 0) {
	return FlushToResult::kSkip;		return FilterResult::kSkip;
	}		}
	if (start == element->getRealTime()) {		if (start == element_realtime) {
	sequence = element->getSequence();		sequence = element_sequence;
	start_time_set = true;		start_time_set = true;
	return FlushToResult::kStop;		return FilterResult::kStop;
	} else {		} else {
	if (start < element->getRealTime()) {		if (start < element_realtime) {
	sequence = last;		sequence = last;
	start_time_set = true;		start_time_set = true;
	return FlushToResult::kStop;		return FilterResult::kStop;
	}		}
	last = element->getSequence();		last = element_sequence;
	}		}
	return FlushToResult::kSkip;		return FilterResult::kSkip;
	};		};

	log_buffer_->FlushTo(socket_log_writer.get(), sequence, nullptr, log_find_start);		log_buffer_->FlushTo(socket_log_writer.get(), sequence, nullptr, log_find_start);

logd/LogReaderThread.cpp

+38 −28

Original line number	Original line	Diff line number	Diff line
	@@ -75,13 +75,21 @@ void LogReaderThread::ThreadFunction() {

	if (tail_) {		if (tail_) {
	log_buffer_->FlushTo(writer_.get(), start, nullptr,		log_buffer_->FlushTo(writer_.get(), start, nullptr,
	std::bind(&LogReaderThread::FilterFirstPass, this, _1));		[this](log_id_t log_id, pid_t pid, uint64_t sequence,
			log_time realtime, uint16_t dropped_count) {
			return FilterFirstPass(log_id, pid, sequence, realtime,
			dropped_count);
			});
	leading_dropped_ =		leading_dropped_ =
	true; // TODO: Likely a bug, if leading_dropped_ was not true before calling		true; // TODO: Likely a bug, if leading_dropped_ was not true before calling
	// flushTo(), then it should not be reset to true after.		// flushTo(), then it should not be reset to true after.
	}		}
	start = log_buffer_->FlushTo(writer_.get(), start, last_tid_,		start = log_buffer_->FlushTo(writer_.get(), start, last_tid_,
	std::bind(&LogReaderThread::FilterSecondPass, this, _1));		[this](log_id_t log_id, pid_t pid, uint64_t sequence,
			log_time realtime, uint16_t dropped_count) {
			return FilterSecondPass(log_id, pid, sequence, realtime,
			dropped_count);
			});

	// We only ignore entries before the original start time for the first flushTo(), if we		// We only ignore entries before the original start time for the first flushTo(), if we
	// get entries after this first flush before the original start time, then the client		// get entries after this first flush before the original start time, then the client
	@@ -123,65 +131,67 @@ void LogReaderThread::ThreadFunction() {
	}		}

	// A first pass to count the number of elements		// A first pass to count the number of elements
	FlushToResult LogReaderThread::FilterFirstPass(const LogBufferElement* element) {		FilterResult LogReaderThread::FilterFirstPass(log_id_t log_id, pid_t pid, uint64_t sequence,
			log_time realtime, uint16_t dropped_count) {
	auto lock = std::lock_guard{reader_list_->reader_threads_lock()};		auto lock = std::lock_guard{reader_list_->reader_threads_lock()};

	if (leading_dropped_) {		if (leading_dropped_) {
	if (element->getDropped()) {		if (dropped_count) {
	return FlushToResult::kSkip;		return FilterResult::kSkip;
	}		}
	leading_dropped_ = false;		leading_dropped_ = false;
	}		}

	if (count_ == 0) {		if (count_ == 0) {
	start_ = element->getSequence();		start_ = sequence;
	}		}

	if ((!pid_ \|\| pid_ == element->getPid()) && IsWatching(element->getLogId()) &&		if ((!pid_ \|\| pid_ == pid) && IsWatching(log_id) &&
	(start_time_ == log_time::EPOCH \|\| start_time_ <= element->getRealTime())) {		(start_time_ == log_time::EPOCH \|\| start_time_ <= realtime)) {
	++count_;		++count_;
	}		}

	return FlushToResult::kSkip;		return FilterResult::kSkip;
	}		}

	// A second pass to send the selected elements		// A second pass to send the selected elements
	FlushToResult LogReaderThread::FilterSecondPass(const LogBufferElement* element) {		FilterResult LogReaderThread::FilterSecondPass(log_id_t log_id, pid_t pid, uint64_t sequence,
			log_time realtime, uint16_t dropped_count) {
	auto lock = std::lock_guard{reader_list_->reader_threads_lock()};		auto lock = std::lock_guard{reader_list_->reader_threads_lock()};

	start_ = element->getSequence();		start_ = sequence;

	if (skip_ahead_[element->getLogId()]) {		if (skip_ahead_[log_id]) {
	skip_ahead_[element->getLogId()]--;		skip_ahead_[log_id]--;
	return FlushToResult::kSkip;		return FilterResult::kSkip;
	}		}

	if (leading_dropped_) {		if (leading_dropped_) {
	if (element->getDropped()) {		if (dropped_count) {
	return FlushToResult::kSkip;		return FilterResult::kSkip;
	}		}
	leading_dropped_ = false;		leading_dropped_ = false;
	}		}

	// Truncate to close race between first and second pass		// Truncate to close race between first and second pass
	if (non_block_ && tail_ && index_ >= count_) {		if (non_block_ && tail_ && index_ >= count_) {
	return FlushToResult::kStop;		return FilterResult::kStop;
	}		}

	if (!IsWatching(element->getLogId())) {		if (!IsWatching(log_id)) {
	return FlushToResult::kSkip;		return FilterResult::kSkip;
	}		}

	if (pid_ && pid_ != element->getPid()) {		if (pid_ && pid_ != pid) {
	return FlushToResult::kSkip;		return FilterResult::kSkip;
	}		}

	if (start_time_ != log_time::EPOCH && element->getRealTime() <= start_time_) {		if (start_time_ != log_time::EPOCH && realtime <= start_time_) {
	return FlushToResult::kSkip;		return FilterResult::kSkip;
	}		}

	if (release_) {		if (release_) {
	return FlushToResult::kStop;		return FilterResult::kStop;
	}		}

	if (!tail_) {		if (!tail_) {
	@@ -191,7 +201,7 @@ FlushToResult LogReaderThread::FilterSecondPass(const LogBufferElement* element)
	++index_;		++index_;

	if (count_ > tail_ && index_ <= (count_ - tail_)) {		if (count_ > tail_ && index_ <= (count_ - tail_)) {
	return FlushToResult::kSkip;		return FilterResult::kSkip;
	}		}

	if (!non_block_) {		if (!non_block_) {
	@@ -199,10 +209,10 @@ FlushToResult LogReaderThread::FilterSecondPass(const LogBufferElement* element)
	}		}

	ok:		ok:
	if (!skip_ahead_[element->getLogId()]) {		if (!skip_ahead_[log_id]) {
	return FlushToResult::kWrite;		return FilterResult::kWrite;
	}		}
	return FlushToResult::kSkip;		return FilterResult::kSkip;
	}		}

	void LogReaderThread::cleanSkip_Locked(void) {		void LogReaderThread::cleanSkip_Locked(void) {

logd/LogReaderThread.h

+4 −3

Original line number	Original line	Diff line number	Diff line
	@@ -30,7 +30,6 @@
	#include <sysutils/SocketClient.h>		#include <sysutils/SocketClient.h>

	#include "LogBuffer.h"		#include "LogBuffer.h"
	#include "LogBufferElement.h"
	#include "LogWriter.h"		#include "LogWriter.h"

	class LogReaderList;		class LogReaderList;
	@@ -63,8 +62,10 @@ class LogReaderThread {
	private:		private:
	void ThreadFunction();		void ThreadFunction();
	// flushTo filter callbacks		// flushTo filter callbacks
	FlushToResult FilterFirstPass(const LogBufferElement* element);		FilterResult FilterFirstPass(log_id_t log_id, pid_t pid, uint64_t sequence, log_time realtime,
	FlushToResult FilterSecondPass(const LogBufferElement* element);		uint16_t dropped_count);
			FilterResult FilterSecondPass(log_id_t log_id, pid_t pid, uint64_t sequence, log_time realtime,
			uint16_t dropped_count);

	std::condition_variable thread_triggered_condition_;		std::condition_variable thread_triggered_condition_;
	LogBuffer* log_buffer_;		LogBuffer* log_buffer_;

logd/SimpleLogBuffer.cpp

+6 −4

Original line number	Original line	Diff line number	Diff line
	@@ -112,7 +112,8 @@ void SimpleLogBuffer::LogInternal(LogBufferElement&& elem) {

	uint64_t SimpleLogBuffer::FlushTo(		uint64_t SimpleLogBuffer::FlushTo(
	LogWriter* writer, uint64_t start, pid_t* last_tid,		LogWriter* writer, uint64_t start, pid_t* last_tid,
	const std::function<FlushToResult(const LogBufferElement* element)>& filter) {		const std::function<FilterResult(log_id_t log_id, pid_t pid, uint64_t sequence,
			log_time realtime, uint16_t dropped_count)>& filter) {
	auto shared_lock = SharedLock{lock_};		auto shared_lock = SharedLock{lock_};

	std::list<LogBufferElement>::iterator it;		std::list<LogBufferElement>::iterator it;
	@@ -146,11 +147,12 @@ uint64_t SimpleLogBuffer::FlushTo(
	}		}

	if (filter) {		if (filter) {
	FlushToResult ret = filter(&element);		FilterResult ret = filter(element.getLogId(), element.getPid(), element.getSequence(),
	if (ret == FlushToResult::kSkip) {		element.getRealTime(), element.getDropped());
			if (ret == FilterResult::kSkip) {
	continue;		continue;
	}		}
	if (ret == FlushToResult::kStop) {		if (ret == FilterResult::kStop) {
	break;		break;
	}		}
	}		}