services/surfaceflinger/tests/unittests/FrameTracerTest.cpp - LeafOS-Project/android_frameworks_native - Gitiles

 /*
  * Copyright 2019 The Android Open Source Project
  *
  * 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
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #undef LOG_TAG
 #define LOG_TAG "LibSurfaceFlingerUnittests"

 #include <FrameTracer/FrameTracer.h>
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
 #include <log/log.h>
 #include <perfetto/trace/trace.pb.h>

 #include "libsurfaceflinger_unittest_main.h"

 using namespace google::protobuf;

 namespace android {
 namespace {

 class FrameTracerTest : public testing::Test {
 public:
     FrameTracerTest() {
         const ::testing::TestInfo* const test_info =
                 ::testing::UnitTest::GetInstance()->current_test_info();
         ALOGD("**** Setting up for %s.%s\n", test_info->test_case_name(), test_info->name());

         // Need to initialize tracing in process for testing, and only once per test suite.
         static bool wasInitialized = false;
         if (!wasInitialized) {
             perfetto::TracingInitArgs args;
             args.backends = perfetto::kInProcessBackend;
             perfetto::Tracing::Initialize(args);
             wasInitialized = true;
         }
     }

     ~FrameTracerTest() {
         const ::testing::TestInfo* const test_info =
                 ::testing::UnitTest::GetInstance()->current_test_info();
         ALOGD("**** Tearing down after %s.%s\n", test_info->test_case_name(), test_info->name());
     }

     void SetUp() override {
         mFrameTracer = std::make_unique<FrameTracer>();
         mFrameTracer->registerDataSource();
     }

     void TearDown() override { mFrameTracer.reset(); }

     // Each tracing session can be used for a single block of Start -> Stop.
     static std::unique_ptr<perfetto::TracingSession> getTracingSessionForTest() {
         perfetto::TraceConfig cfg;
         cfg.set_duration_ms(500);
         cfg.add_buffers()->set_size_kb(1024);
         auto* ds_cfg = cfg.add_data_sources()->mutable_config();
         ds_cfg->set_name(FrameTracer::kFrameTracerDataSource);

         auto tracingSession = perfetto::Tracing::NewTrace(perfetto::kInProcessBackend);
         tracingSession->Setup(cfg);
         return tracingSession;
     }

     std::unique_ptr<FrameTracer> mFrameTracer;
     FenceToFenceTimeMap fenceFactory;
 };

 TEST_F(FrameTracerTest, traceNewLayerStartsTrackingLayerWhenTracing) {
     EXPECT_EQ(mFrameTracer->miniDump(),
               "FrameTracer miniDump:\nNumber of layers currently being traced is 0\n");

     const std::string layerName = "co.layername#0";
     const int32_t layerId = 5;
     mFrameTracer->traceNewLayer(layerId, layerName);

     EXPECT_EQ(mFrameTracer->miniDump(),
               "FrameTracer miniDump:\nNumber of layers currently being traced is 0\n");

     auto tracingSession = getTracingSessionForTest();
     tracingSession->StartBlocking();
     EXPECT_EQ(mFrameTracer->miniDump(),
               "FrameTracer miniDump:\nNumber of layers currently being traced is 0\n");
     mFrameTracer->traceNewLayer(layerId, layerName);
     EXPECT_EQ(mFrameTracer->miniDump(),
               "FrameTracer miniDump:\nNumber of layers currently being traced is 1\n");
     tracingSession->StopBlocking();
 }

 TEST_F(FrameTracerTest, onDestroyRemovesTheTrackedLayer) {
     EXPECT_EQ(mFrameTracer->miniDump(),
               "FrameTracer miniDump:\nNumber of layers currently being traced is 0\n");

     const std::string layerName = "co.layername#0";
     const int32_t layerId = 5;
     const int32_t secondlayerId = 6;

     auto tracingSession = getTracingSessionForTest();
     tracingSession->StartBlocking();
     mFrameTracer->traceNewLayer(layerId, layerName);
     mFrameTracer->traceNewLayer(secondlayerId, layerName);
     EXPECT_EQ(mFrameTracer->miniDump(),
               "FrameTracer miniDump:\nNumber of layers currently being traced is 2\n");
     tracingSession->StopBlocking();

     mFrameTracer->onDestroy(layerId);
     EXPECT_EQ(mFrameTracer->miniDump(),
               "FrameTracer miniDump:\nNumber of layers currently being traced is 1\n");
     mFrameTracer->onDestroy(layerId);
     EXPECT_EQ(mFrameTracer->miniDump(),
               "FrameTracer miniDump:\nNumber of layers currently being traced is 1\n");
     mFrameTracer->onDestroy(secondlayerId);
     EXPECT_EQ(mFrameTracer->miniDump(),
               "FrameTracer miniDump:\nNumber of layers currently being traced is 0\n");
 }

 TEST_F(FrameTracerTest, canTraceAfterAddingLayer) {
     const std::string layerName = "co.layername#0";
     const int32_t layerId = 1;
     const uint32_t bufferID = 2;
     const uint64_t frameNumber = 3;
     const nsecs_t timestamp = 4;
     const nsecs_t duration = 5;
     const auto type = FrameTracer::FrameEvent::POST;

     {
         auto tracingSession = getTracingSessionForTest();

         tracingSession->StartBlocking();
         // Clean up irrelevant traces.
         tracingSession->ReadTraceBlocking();

         mFrameTracer->traceTimestamp(layerId, bufferID, frameNumber, timestamp, type, duration);
         // Create second trace packet to finalize the previous one.
         mFrameTracer->traceTimestamp(layerId, 0, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
         tracingSession->StopBlocking();

         std::vector<char> raw_trace = tracingSession->ReadTraceBlocking();
         EXPECT_EQ(raw_trace.size(), 0);
     }

     {
         auto tracingSession = getTracingSessionForTest();

         tracingSession->StartBlocking();
         // Clean up irrelevant traces.
         tracingSession->ReadTraceBlocking();

         mFrameTracer->traceNewLayer(layerId, layerName);
         mFrameTracer->traceTimestamp(layerId, bufferID, frameNumber, timestamp, type, duration);
         // Create second trace packet to finalize the previous one.
         mFrameTracer->traceTimestamp(layerId, 0, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
         tracingSession->StopBlocking();

         std::vector<char> raw_trace = tracingSession->ReadTraceBlocking();
         ASSERT_GT(raw_trace.size(), 0);

         perfetto::protos::Trace trace;
         ASSERT_TRUE(trace.ParseFromArray(raw_trace.data(), int(raw_trace.size())));
         ASSERT_FALSE(trace.packet().empty());
         EXPECT_EQ(trace.packet().size(), 1);

         const auto& packet = trace.packet().Get(0);
         ASSERT_TRUE(packet.has_timestamp());
         EXPECT_EQ(packet.timestamp(), timestamp);
         ASSERT_TRUE(packet.has_graphics_frame_event());
         const auto& frame_event = packet.graphics_frame_event();
         ASSERT_TRUE(frame_event.has_buffer_event());
         const auto& buffer_event = frame_event.buffer_event();
         ASSERT_TRUE(buffer_event.has_buffer_id());
         EXPECT_EQ(buffer_event.buffer_id(), bufferID);
         ASSERT_TRUE(buffer_event.has_frame_number());
         EXPECT_EQ(buffer_event.frame_number(), frameNumber);
         ASSERT_TRUE(buffer_event.has_type());
         EXPECT_EQ(buffer_event.type(), perfetto::protos::GraphicsFrameEvent_BufferEventType(type));
         ASSERT_TRUE(buffer_event.has_duration_ns());
         EXPECT_EQ(buffer_event.duration_ns(), duration);
     }
 }

 TEST_F(FrameTracerTest, traceFenceTriggersOnNextTraceAfterFenceFired) {
     const std::string layerName = "co.layername#0";
     const int32_t layerId = 5;
     const uint32_t bufferID = 4;
     const uint64_t frameNumber = 3;
     const auto type = FrameTracer::FrameEvent::ACQUIRE_FENCE;

     {
         auto fenceTime = fenceFactory.createFenceTimeForTest(Fence::NO_FENCE);
         fenceFactory.signalAllForTest(Fence::NO_FENCE, Fence::SIGNAL_TIME_PENDING);
         auto tracingSession = getTracingSessionForTest();
         tracingSession->StartBlocking();
         // Clean up irrelevant traces.
         tracingSession->ReadTraceBlocking();
         // Trace.
         mFrameTracer->traceNewLayer(layerId, layerName);
         mFrameTracer->traceFence(layerId, bufferID, frameNumber, fenceTime, type);
         // Create extra trace packet to (hopefully not) trigger and finalize the fence packet.
         mFrameTracer->traceTimestamp(layerId, bufferID, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
         tracingSession->StopBlocking();
         std::vector<char> raw_trace = tracingSession->ReadTraceBlocking();
         EXPECT_EQ(raw_trace.size(), 0);
     }

     {
         auto fenceTime = fenceFactory.createFenceTimeForTest(Fence::NO_FENCE);
         auto tracingSession = getTracingSessionForTest();
         tracingSession->StartBlocking();
         // Clean up irrelevant traces.
         tracingSession->ReadTraceBlocking();
         mFrameTracer->traceNewLayer(layerId, layerName);
         mFrameTracer->traceFence(layerId, bufferID, frameNumber, fenceTime, type);
         const nsecs_t timestamp = systemTime();
         fenceFactory.signalAllForTest(Fence::NO_FENCE, timestamp);
         // Create extra trace packet to trigger and finalize fence trace packets.
         mFrameTracer->traceTimestamp(layerId, bufferID, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
         tracingSession->StopBlocking();

         std::vector<char> raw_trace = tracingSession->ReadTraceBlocking();
         ASSERT_GT(raw_trace.size(), 0);

         perfetto::protos::Trace trace;
         ASSERT_TRUE(trace.ParseFromArray(raw_trace.data(), int(raw_trace.size())));
         ASSERT_FALSE(trace.packet().empty());
         EXPECT_EQ(trace.packet().size(), 2); // Two packets because of the extra trace made above.

         const auto& packet = trace.packet().Get(1);
         ASSERT_TRUE(packet.has_timestamp());
         EXPECT_EQ(packet.timestamp(), timestamp);
         ASSERT_TRUE(packet.has_graphics_frame_event());
         const auto& frame_event = packet.graphics_frame_event();
         ASSERT_TRUE(frame_event.has_buffer_event());
         const auto& buffer_event = frame_event.buffer_event();
         ASSERT_TRUE(buffer_event.has_buffer_id());
         EXPECT_EQ(buffer_event.buffer_id(), bufferID);
         ASSERT_TRUE(buffer_event.has_frame_number());
         EXPECT_EQ(buffer_event.frame_number(), frameNumber);
         ASSERT_TRUE(buffer_event.has_type());
         EXPECT_EQ(buffer_event.type(), perfetto::protos::GraphicsFrameEvent_BufferEventType(type));
         EXPECT_FALSE(buffer_event.has_duration_ns());
     }
 }

 TEST_F(FrameTracerTest, traceFenceWithStartTimeAfterSignalTime_ShouldHaveNoDuration) {
     const std::string layerName = "co.layername#0";
     const int32_t layerId = 5;
     const uint32_t bufferID = 4;
     const uint64_t frameNumber = 3;
     const auto type = FrameTracer::FrameEvent::ACQUIRE_FENCE;

     auto tracingSession = getTracingSessionForTest();

     tracingSession->StartBlocking();
     // Clean up irrelevant traces.
     tracingSession->ReadTraceBlocking();
     mFrameTracer->traceNewLayer(layerId, layerName);

     // traceFence called after fence signalled.
     const nsecs_t signalTime1 = systemTime();
     const nsecs_t startTime1 = signalTime1 + 100000;
     auto fence1 = fenceFactory.createFenceTimeForTest(Fence::NO_FENCE);
     fenceFactory.signalAllForTest(Fence::NO_FENCE, signalTime1);
     mFrameTracer->traceFence(layerId, bufferID, frameNumber, fence1, type, startTime1);

     // traceFence called before fence signalled.
     const nsecs_t signalTime2 = systemTime();
     const nsecs_t startTime2 = signalTime2 + 100000;
     auto fence2 = fenceFactory.createFenceTimeForTest(Fence::NO_FENCE);
     mFrameTracer->traceFence(layerId, bufferID, frameNumber, fence2, type, startTime2);
     fenceFactory.signalAllForTest(Fence::NO_FENCE, signalTime2);

     // Create extra trace packet to trigger and finalize fence trace packets.
     mFrameTracer->traceTimestamp(layerId, bufferID, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
     tracingSession->StopBlocking();

     std::vector<char> raw_trace = tracingSession->ReadTraceBlocking();
     ASSERT_GT(raw_trace.size(), 0);

     perfetto::protos::Trace trace;
     ASSERT_TRUE(trace.ParseFromArray(raw_trace.data(), int(raw_trace.size())));
     ASSERT_FALSE(trace.packet().empty());
     EXPECT_EQ(trace.packet().size(), 2);

     const auto& packet1 = trace.packet().Get(0);
     ASSERT_TRUE(packet1.has_timestamp());
     EXPECT_EQ(packet1.timestamp(), signalTime1);
     ASSERT_TRUE(packet1.has_graphics_frame_event());
     ASSERT_TRUE(packet1.graphics_frame_event().has_buffer_event());
     ASSERT_FALSE(packet1.graphics_frame_event().buffer_event().has_duration_ns());

     const auto& packet2 = trace.packet().Get(1);
     ASSERT_TRUE(packet2.has_timestamp());
     EXPECT_EQ(packet2.timestamp(), signalTime2);
     ASSERT_TRUE(packet2.has_graphics_frame_event());
     ASSERT_TRUE(packet2.graphics_frame_event().has_buffer_event());
     ASSERT_FALSE(packet2.graphics_frame_event().buffer_event().has_duration_ns());
 }

 TEST_F(FrameTracerTest, traceFenceOlderThanDeadline_ShouldBeIgnored) {
     const std::string layerName = "co.layername#0";
     const int32_t layerId = 5;
     const uint32_t bufferID = 4;
     const uint64_t frameNumber = 3;
     const auto type = FrameTracer::FrameEvent::ACQUIRE_FENCE;
     const nsecs_t signalTime = systemTime() - FrameTracer::kFenceSignallingDeadline;

     auto tracingSession = getTracingSessionForTest();
     auto fence = fenceFactory.createFenceTimeForTest(Fence::NO_FENCE);

     tracingSession->StartBlocking();
     // Clean up irrelevant traces.
     tracingSession->ReadTraceBlocking();
     mFrameTracer->traceNewLayer(layerId, layerName);
     mFrameTracer->traceFence(layerId, bufferID, frameNumber, fence, type);
     fenceFactory.signalAllForTest(Fence::NO_FENCE, signalTime);
     // Create extra trace packet to trigger and finalize any previous fence packets.
     mFrameTracer->traceTimestamp(layerId, bufferID, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
     tracingSession->StopBlocking();

     std::vector<char> raw_trace = tracingSession->ReadTraceBlocking();
     EXPECT_EQ(raw_trace.size(), 0);
 }

 TEST_F(FrameTracerTest, traceFenceWithValidStartTime_ShouldHaveCorrectDuration) {
     const std::string layerName = "co.layername#0";
     const int32_t layerId = 5;
     const uint32_t bufferID = 4;
     const uint64_t frameNumber = 3;
     const auto type = FrameTracer::FrameEvent::ACQUIRE_FENCE;
     const nsecs_t duration = 1234;

     auto tracingSession = getTracingSessionForTest();

     tracingSession->StartBlocking();
     // Clean up irrelevant traces.
     tracingSession->ReadTraceBlocking();
     mFrameTracer->traceNewLayer(layerId, layerName);

     // traceFence called after fence signalled.
     const nsecs_t signalTime1 = systemTime();
     const nsecs_t startTime1 = signalTime1 - duration;
     auto fence1 = fenceFactory.createFenceTimeForTest(Fence::NO_FENCE);
     fenceFactory.signalAllForTest(Fence::NO_FENCE, signalTime1);
     mFrameTracer->traceFence(layerId, bufferID, frameNumber, fence1, type, startTime1);

     // traceFence called before fence signalled.
     const nsecs_t signalTime2 = systemTime();
     const nsecs_t startTime2 = signalTime2 - duration;
     auto fence2 = fenceFactory.createFenceTimeForTest(Fence::NO_FENCE);
     mFrameTracer->traceFence(layerId, bufferID, frameNumber, fence2, type, startTime2);
     fenceFactory.signalAllForTest(Fence::NO_FENCE, signalTime2);

     // Create extra trace packet to trigger and finalize fence trace packets.
     mFrameTracer->traceTimestamp(layerId, bufferID, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
     tracingSession->StopBlocking();

     std::vector<char> raw_trace = tracingSession->ReadTraceBlocking();
     ASSERT_GT(raw_trace.size(), 0);

     perfetto::protos::Trace trace;
     ASSERT_TRUE(trace.ParseFromArray(raw_trace.data(), int(raw_trace.size())));
     ASSERT_FALSE(trace.packet().empty());
     EXPECT_EQ(trace.packet().size(), 2);

     const auto& packet1 = trace.packet().Get(0);
     ASSERT_TRUE(packet1.has_timestamp());
     EXPECT_EQ(packet1.timestamp(), startTime1);
     ASSERT_TRUE(packet1.has_graphics_frame_event());
     ASSERT_TRUE(packet1.graphics_frame_event().has_buffer_event());
     ASSERT_TRUE(packet1.graphics_frame_event().buffer_event().has_duration_ns());
     const auto& buffer_event1 = packet1.graphics_frame_event().buffer_event();
     EXPECT_EQ(buffer_event1.duration_ns(), duration);

     const auto& packet2 = trace.packet().Get(1);
     ASSERT_TRUE(packet2.has_timestamp());
     EXPECT_EQ(packet2.timestamp(), startTime2);
     ASSERT_TRUE(packet2.has_graphics_frame_event());
     ASSERT_TRUE(packet2.graphics_frame_event().has_buffer_event());
     ASSERT_TRUE(packet2.graphics_frame_event().buffer_event().has_duration_ns());
     const auto& buffer_event2 = packet2.graphics_frame_event().buffer_event();
     EXPECT_EQ(buffer_event2.duration_ns(), duration);
 }

 } // namespace
 } // namespace android
	/*
	* Copyright 2019 The Android Open Source Project
	*
	* 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
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#undef LOG_TAG
	#define LOG_TAG "LibSurfaceFlingerUnittests"

	#include <FrameTracer/FrameTracer.h>
	#include <gmock/gmock.h>
	#include <gtest/gtest.h>
	#include <log/log.h>
	#include <perfetto/trace/trace.pb.h>

	#include "libsurfaceflinger_unittest_main.h"

	using namespace google::protobuf;

	namespace android {
	namespace {

	class FrameTracerTest : public testing::Test {
	public:
	FrameTracerTest() {
	const ::testing::TestInfo* const test_info =
	::testing::UnitTest::GetInstance()->current_test_info();
	ALOGD("**** Setting up for %s.%s\n", test_info->test_case_name(), test_info->name());

	// Need to initialize tracing in process for testing, and only once per test suite.
	static bool wasInitialized = false;
	if (!wasInitialized) {
	perfetto::TracingInitArgs args;
	args.backends = perfetto::kInProcessBackend;
	perfetto::Tracing::Initialize(args);
	wasInitialized = true;
	}
	}

	~FrameTracerTest() {
	const ::testing::TestInfo* const test_info =
	::testing::UnitTest::GetInstance()->current_test_info();
	ALOGD("**** Tearing down after %s.%s\n", test_info->test_case_name(), test_info->name());
	}

	void SetUp() override {
	mFrameTracer = std::make_unique<FrameTracer>();
	mFrameTracer->registerDataSource();
	}

	void TearDown() override { mFrameTracer.reset(); }

	// Each tracing session can be used for a single block of Start -> Stop.
	static std::unique_ptr<perfetto::TracingSession> getTracingSessionForTest() {
	perfetto::TraceConfig cfg;
	cfg.set_duration_ms(500);
	cfg.add_buffers()->set_size_kb(1024);
	auto* ds_cfg = cfg.add_data_sources()->mutable_config();
	ds_cfg->set_name(FrameTracer::kFrameTracerDataSource);

	auto tracingSession = perfetto::Tracing::NewTrace(perfetto::kInProcessBackend);
	tracingSession->Setup(cfg);
	return tracingSession;
	}

	std::unique_ptr<FrameTracer> mFrameTracer;
	FenceToFenceTimeMap fenceFactory;
	};

	TEST_F(FrameTracerTest, traceNewLayerStartsTrackingLayerWhenTracing) {
	EXPECT_EQ(mFrameTracer->miniDump(),
	"FrameTracer miniDump:\nNumber of layers currently being traced is 0\n");

	const std::string layerName = "co.layername#0";
	const int32_t layerId = 5;
	mFrameTracer->traceNewLayer(layerId, layerName);

	EXPECT_EQ(mFrameTracer->miniDump(),
	"FrameTracer miniDump:\nNumber of layers currently being traced is 0\n");

	auto tracingSession = getTracingSessionForTest();
	tracingSession->StartBlocking();
	EXPECT_EQ(mFrameTracer->miniDump(),
	"FrameTracer miniDump:\nNumber of layers currently being traced is 0\n");
	mFrameTracer->traceNewLayer(layerId, layerName);
	EXPECT_EQ(mFrameTracer->miniDump(),
	"FrameTracer miniDump:\nNumber of layers currently being traced is 1\n");
	tracingSession->StopBlocking();
	}

	TEST_F(FrameTracerTest, onDestroyRemovesTheTrackedLayer) {
	EXPECT_EQ(mFrameTracer->miniDump(),
	"FrameTracer miniDump:\nNumber of layers currently being traced is 0\n");

	const std::string layerName = "co.layername#0";
	const int32_t layerId = 5;
	const int32_t secondlayerId = 6;

	auto tracingSession = getTracingSessionForTest();
	tracingSession->StartBlocking();
	mFrameTracer->traceNewLayer(layerId, layerName);
	mFrameTracer->traceNewLayer(secondlayerId, layerName);
	EXPECT_EQ(mFrameTracer->miniDump(),
	"FrameTracer miniDump:\nNumber of layers currently being traced is 2\n");
	tracingSession->StopBlocking();

	mFrameTracer->onDestroy(layerId);
	EXPECT_EQ(mFrameTracer->miniDump(),
	"FrameTracer miniDump:\nNumber of layers currently being traced is 1\n");
	mFrameTracer->onDestroy(layerId);
	EXPECT_EQ(mFrameTracer->miniDump(),
	"FrameTracer miniDump:\nNumber of layers currently being traced is 1\n");
	mFrameTracer->onDestroy(secondlayerId);
	EXPECT_EQ(mFrameTracer->miniDump(),
	"FrameTracer miniDump:\nNumber of layers currently being traced is 0\n");
	}

	TEST_F(FrameTracerTest, canTraceAfterAddingLayer) {
	const std::string layerName = "co.layername#0";
	const int32_t layerId = 1;
	const uint32_t bufferID = 2;
	const uint64_t frameNumber = 3;
	const nsecs_t timestamp = 4;
	const nsecs_t duration = 5;
	const auto type = FrameTracer::FrameEvent::POST;

	{
	auto tracingSession = getTracingSessionForTest();

	tracingSession->StartBlocking();
	// Clean up irrelevant traces.
	tracingSession->ReadTraceBlocking();

	mFrameTracer->traceTimestamp(layerId, bufferID, frameNumber, timestamp, type, duration);
	// Create second trace packet to finalize the previous one.
	mFrameTracer->traceTimestamp(layerId, 0, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
	tracingSession->StopBlocking();

	std::vector<char> raw_trace = tracingSession->ReadTraceBlocking();
	EXPECT_EQ(raw_trace.size(), 0);
	}

	{
	auto tracingSession = getTracingSessionForTest();

	tracingSession->StartBlocking();
	// Clean up irrelevant traces.
	tracingSession->ReadTraceBlocking();

	mFrameTracer->traceNewLayer(layerId, layerName);
	mFrameTracer->traceTimestamp(layerId, bufferID, frameNumber, timestamp, type, duration);
	// Create second trace packet to finalize the previous one.
	mFrameTracer->traceTimestamp(layerId, 0, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
	tracingSession->StopBlocking();

	std::vector<char> raw_trace = tracingSession->ReadTraceBlocking();
	ASSERT_GT(raw_trace.size(), 0);

	perfetto::protos::Trace trace;
	ASSERT_TRUE(trace.ParseFromArray(raw_trace.data(), int(raw_trace.size())));
	ASSERT_FALSE(trace.packet().empty());
	EXPECT_EQ(trace.packet().size(), 1);

	const auto& packet = trace.packet().Get(0);
	ASSERT_TRUE(packet.has_timestamp());
	EXPECT_EQ(packet.timestamp(), timestamp);
	ASSERT_TRUE(packet.has_graphics_frame_event());
	const auto& frame_event = packet.graphics_frame_event();
	ASSERT_TRUE(frame_event.has_buffer_event());
	const auto& buffer_event = frame_event.buffer_event();
	ASSERT_TRUE(buffer_event.has_buffer_id());
	EXPECT_EQ(buffer_event.buffer_id(), bufferID);
	ASSERT_TRUE(buffer_event.has_frame_number());
	EXPECT_EQ(buffer_event.frame_number(), frameNumber);
	ASSERT_TRUE(buffer_event.has_type());
	EXPECT_EQ(buffer_event.type(), perfetto::protos::GraphicsFrameEvent_BufferEventType(type));
	ASSERT_TRUE(buffer_event.has_duration_ns());
	EXPECT_EQ(buffer_event.duration_ns(), duration);
	}
	}

	TEST_F(FrameTracerTest, traceFenceTriggersOnNextTraceAfterFenceFired) {
	const std::string layerName = "co.layername#0";
	const int32_t layerId = 5;
	const uint32_t bufferID = 4;
	const uint64_t frameNumber = 3;
	const auto type = FrameTracer::FrameEvent::ACQUIRE_FENCE;

	{
	auto fenceTime = fenceFactory.createFenceTimeForTest(Fence::NO_FENCE);
	fenceFactory.signalAllForTest(Fence::NO_FENCE, Fence::SIGNAL_TIME_PENDING);
	auto tracingSession = getTracingSessionForTest();
	tracingSession->StartBlocking();
	// Clean up irrelevant traces.
	tracingSession->ReadTraceBlocking();
	// Trace.
	mFrameTracer->traceNewLayer(layerId, layerName);
	mFrameTracer->traceFence(layerId, bufferID, frameNumber, fenceTime, type);
	// Create extra trace packet to (hopefully not) trigger and finalize the fence packet.
	mFrameTracer->traceTimestamp(layerId, bufferID, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
	tracingSession->StopBlocking();
	std::vector<char> raw_trace = tracingSession->ReadTraceBlocking();
	EXPECT_EQ(raw_trace.size(), 0);
	}

	{
	auto fenceTime = fenceFactory.createFenceTimeForTest(Fence::NO_FENCE);
	auto tracingSession = getTracingSessionForTest();
	tracingSession->StartBlocking();
	// Clean up irrelevant traces.
	tracingSession->ReadTraceBlocking();
	mFrameTracer->traceNewLayer(layerId, layerName);
	mFrameTracer->traceFence(layerId, bufferID, frameNumber, fenceTime, type);
	const nsecs_t timestamp = systemTime();
	fenceFactory.signalAllForTest(Fence::NO_FENCE, timestamp);
	// Create extra trace packet to trigger and finalize fence trace packets.
	mFrameTracer->traceTimestamp(layerId, bufferID, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
	tracingSession->StopBlocking();

	std::vector<char> raw_trace = tracingSession->ReadTraceBlocking();
	ASSERT_GT(raw_trace.size(), 0);

	perfetto::protos::Trace trace;
	ASSERT_TRUE(trace.ParseFromArray(raw_trace.data(), int(raw_trace.size())));
	ASSERT_FALSE(trace.packet().empty());
	EXPECT_EQ(trace.packet().size(), 2); // Two packets because of the extra trace made above.

	const auto& packet = trace.packet().Get(1);
	ASSERT_TRUE(packet.has_timestamp());
	EXPECT_EQ(packet.timestamp(), timestamp);
	ASSERT_TRUE(packet.has_graphics_frame_event());
	const auto& frame_event = packet.graphics_frame_event();
	ASSERT_TRUE(frame_event.has_buffer_event());
	const auto& buffer_event = frame_event.buffer_event();
	ASSERT_TRUE(buffer_event.has_buffer_id());
	EXPECT_EQ(buffer_event.buffer_id(), bufferID);
	ASSERT_TRUE(buffer_event.has_frame_number());
	EXPECT_EQ(buffer_event.frame_number(), frameNumber);
	ASSERT_TRUE(buffer_event.has_type());
	EXPECT_EQ(buffer_event.type(), perfetto::protos::GraphicsFrameEvent_BufferEventType(type));
	EXPECT_FALSE(buffer_event.has_duration_ns());
	}
	}

	TEST_F(FrameTracerTest, traceFenceWithStartTimeAfterSignalTime_ShouldHaveNoDuration) {
	const std::string layerName = "co.layername#0";
	const int32_t layerId = 5;
	const uint32_t bufferID = 4;
	const uint64_t frameNumber = 3;
	const auto type = FrameTracer::FrameEvent::ACQUIRE_FENCE;

	auto tracingSession = getTracingSessionForTest();

	tracingSession->StartBlocking();
	// Clean up irrelevant traces.
	tracingSession->ReadTraceBlocking();
	mFrameTracer->traceNewLayer(layerId, layerName);

	// traceFence called after fence signalled.
	const nsecs_t signalTime1 = systemTime();
	const nsecs_t startTime1 = signalTime1 + 100000;
	auto fence1 = fenceFactory.createFenceTimeForTest(Fence::NO_FENCE);
	fenceFactory.signalAllForTest(Fence::NO_FENCE, signalTime1);
	mFrameTracer->traceFence(layerId, bufferID, frameNumber, fence1, type, startTime1);

	// traceFence called before fence signalled.
	const nsecs_t signalTime2 = systemTime();
	const nsecs_t startTime2 = signalTime2 + 100000;
	auto fence2 = fenceFactory.createFenceTimeForTest(Fence::NO_FENCE);
	mFrameTracer->traceFence(layerId, bufferID, frameNumber, fence2, type, startTime2);
	fenceFactory.signalAllForTest(Fence::NO_FENCE, signalTime2);

	// Create extra trace packet to trigger and finalize fence trace packets.
	mFrameTracer->traceTimestamp(layerId, bufferID, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
	tracingSession->StopBlocking();

	std::vector<char> raw_trace = tracingSession->ReadTraceBlocking();
	ASSERT_GT(raw_trace.size(), 0);

	perfetto::protos::Trace trace;
	ASSERT_TRUE(trace.ParseFromArray(raw_trace.data(), int(raw_trace.size())));
	ASSERT_FALSE(trace.packet().empty());
	EXPECT_EQ(trace.packet().size(), 2);

	const auto& packet1 = trace.packet().Get(0);
	ASSERT_TRUE(packet1.has_timestamp());
	EXPECT_EQ(packet1.timestamp(), signalTime1);
	ASSERT_TRUE(packet1.has_graphics_frame_event());
	ASSERT_TRUE(packet1.graphics_frame_event().has_buffer_event());
	ASSERT_FALSE(packet1.graphics_frame_event().buffer_event().has_duration_ns());

	const auto& packet2 = trace.packet().Get(1);
	ASSERT_TRUE(packet2.has_timestamp());
	EXPECT_EQ(packet2.timestamp(), signalTime2);
	ASSERT_TRUE(packet2.has_graphics_frame_event());
	ASSERT_TRUE(packet2.graphics_frame_event().has_buffer_event());
	ASSERT_FALSE(packet2.graphics_frame_event().buffer_event().has_duration_ns());
	}

	TEST_F(FrameTracerTest, traceFenceOlderThanDeadline_ShouldBeIgnored) {
	const std::string layerName = "co.layername#0";
	const int32_t layerId = 5;
	const uint32_t bufferID = 4;
	const uint64_t frameNumber = 3;
	const auto type = FrameTracer::FrameEvent::ACQUIRE_FENCE;
	const nsecs_t signalTime = systemTime() - FrameTracer::kFenceSignallingDeadline;

	auto tracingSession = getTracingSessionForTest();
	auto fence = fenceFactory.createFenceTimeForTest(Fence::NO_FENCE);

	tracingSession->StartBlocking();
	// Clean up irrelevant traces.
	tracingSession->ReadTraceBlocking();
	mFrameTracer->traceNewLayer(layerId, layerName);
	mFrameTracer->traceFence(layerId, bufferID, frameNumber, fence, type);
	fenceFactory.signalAllForTest(Fence::NO_FENCE, signalTime);
	// Create extra trace packet to trigger and finalize any previous fence packets.
	mFrameTracer->traceTimestamp(layerId, bufferID, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
	tracingSession->StopBlocking();

	std::vector<char> raw_trace = tracingSession->ReadTraceBlocking();
	EXPECT_EQ(raw_trace.size(), 0);
	}

	TEST_F(FrameTracerTest, traceFenceWithValidStartTime_ShouldHaveCorrectDuration) {
	const std::string layerName = "co.layername#0";
	const int32_t layerId = 5;
	const uint32_t bufferID = 4;
	const uint64_t frameNumber = 3;
	const auto type = FrameTracer::FrameEvent::ACQUIRE_FENCE;
	const nsecs_t duration = 1234;

	auto tracingSession = getTracingSessionForTest();

	tracingSession->StartBlocking();
	// Clean up irrelevant traces.
	tracingSession->ReadTraceBlocking();
	mFrameTracer->traceNewLayer(layerId, layerName);

	// traceFence called after fence signalled.
	const nsecs_t signalTime1 = systemTime();
	const nsecs_t startTime1 = signalTime1 - duration;
	auto fence1 = fenceFactory.createFenceTimeForTest(Fence::NO_FENCE);
	fenceFactory.signalAllForTest(Fence::NO_FENCE, signalTime1);
	mFrameTracer->traceFence(layerId, bufferID, frameNumber, fence1, type, startTime1);

	// traceFence called before fence signalled.
	const nsecs_t signalTime2 = systemTime();
	const nsecs_t startTime2 = signalTime2 - duration;
	auto fence2 = fenceFactory.createFenceTimeForTest(Fence::NO_FENCE);
	mFrameTracer->traceFence(layerId, bufferID, frameNumber, fence2, type, startTime2);
	fenceFactory.signalAllForTest(Fence::NO_FENCE, signalTime2);

	// Create extra trace packet to trigger and finalize fence trace packets.
	mFrameTracer->traceTimestamp(layerId, bufferID, 0, 0, FrameTracer::FrameEvent::UNSPECIFIED);
	tracingSession->StopBlocking();

	std::vector<char> raw_trace = tracingSession->ReadTraceBlocking();
	ASSERT_GT(raw_trace.size(), 0);

	perfetto::protos::Trace trace;
	ASSERT_TRUE(trace.ParseFromArray(raw_trace.data(), int(raw_trace.size())));
	ASSERT_FALSE(trace.packet().empty());
	EXPECT_EQ(trace.packet().size(), 2);

	const auto& packet1 = trace.packet().Get(0);
	ASSERT_TRUE(packet1.has_timestamp());
	EXPECT_EQ(packet1.timestamp(), startTime1);
	ASSERT_TRUE(packet1.has_graphics_frame_event());
	ASSERT_TRUE(packet1.graphics_frame_event().has_buffer_event());
	ASSERT_TRUE(packet1.graphics_frame_event().buffer_event().has_duration_ns());
	const auto& buffer_event1 = packet1.graphics_frame_event().buffer_event();
	EXPECT_EQ(buffer_event1.duration_ns(), duration);

	const auto& packet2 = trace.packet().Get(1);
	ASSERT_TRUE(packet2.has_timestamp());
	EXPECT_EQ(packet2.timestamp(), startTime2);
	ASSERT_TRUE(packet2.has_graphics_frame_event());
	ASSERT_TRUE(packet2.graphics_frame_event().has_buffer_event());
	ASSERT_TRUE(packet2.graphics_frame_event().buffer_event().has_duration_ns());
	const auto& buffer_event2 = packet2.graphics_frame_event().buffer_event();
	EXPECT_EQ(buffer_event2.duration_ns(), duration);
	}

	} // namespace
	} // namespace android