| /* |
| * Copyright 2017 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 "SurfaceTracing" |
| #define ATRACE_TAG ATRACE_TAG_GRAPHICS |
| |
| #include "SurfaceTracing.h" |
| #include <SurfaceFlinger.h> |
| |
| #include <android-base/file.h> |
| #include <android-base/stringprintf.h> |
| #include <log/log.h> |
| #include <utils/SystemClock.h> |
| #include <utils/Trace.h> |
| |
| namespace android { |
| |
| SurfaceTracing::SurfaceTracing(SurfaceFlinger& flinger) : mFlinger(flinger) {} |
| |
| bool SurfaceTracing::enable() { |
| std::scoped_lock lock(mTraceLock); |
| if (mEnabled) { |
| return false; |
| } |
| |
| if (flagIsSet(TRACE_SYNC)) { |
| runner = std::make_unique<SurfaceTracing::Runner>(mFlinger, mConfig); |
| } else { |
| runner = std::make_unique<SurfaceTracing::AsyncRunner>(mFlinger, mConfig, |
| mFlinger.mTracingLock); |
| } |
| mEnabled = true; |
| return true; |
| } |
| |
| bool SurfaceTracing::disable() { |
| std::scoped_lock lock(mTraceLock); |
| if (!mEnabled) { |
| return false; |
| } |
| mEnabled = false; |
| runner->stop(); |
| return true; |
| } |
| |
| bool SurfaceTracing::isEnabled() const { |
| std::scoped_lock lock(mTraceLock); |
| return mEnabled; |
| } |
| |
| status_t SurfaceTracing::writeToFile() { |
| std::scoped_lock lock(mTraceLock); |
| if (!mEnabled) { |
| return STATUS_OK; |
| } |
| return runner->writeToFile(); |
| } |
| |
| void SurfaceTracing::notify(const char* where) { |
| std::scoped_lock lock(mTraceLock); |
| if (mEnabled) { |
| runner->notify(where); |
| } |
| } |
| |
| void SurfaceTracing::notifyLocked(const char* where) { |
| std::scoped_lock lock(mTraceLock); |
| if (mEnabled) { |
| runner->notifyLocked(where); |
| } |
| } |
| |
| void SurfaceTracing::dump(std::string& result) const { |
| std::scoped_lock lock(mTraceLock); |
| base::StringAppendF(&result, "Tracing state: %s\n", mEnabled ? "enabled" : "disabled"); |
| if (mEnabled) { |
| runner->dump(result); |
| } |
| } |
| |
| void SurfaceTracing::LayersTraceBuffer::reset(size_t newSize) { |
| // use the swap trick to make sure memory is released |
| std::queue<LayersTraceProto>().swap(mStorage); |
| mSizeInBytes = newSize; |
| mUsedInBytes = 0U; |
| } |
| |
| void SurfaceTracing::LayersTraceBuffer::emplace(LayersTraceProto&& proto) { |
| size_t protoSize = static_cast<size_t>(proto.ByteSize()); |
| while (mUsedInBytes + protoSize > mSizeInBytes) { |
| if (mStorage.empty()) { |
| return; |
| } |
| mUsedInBytes -= static_cast<size_t>(mStorage.front().ByteSize()); |
| mStorage.pop(); |
| } |
| mUsedInBytes += protoSize; |
| mStorage.emplace(); |
| mStorage.back().Swap(&proto); |
| } |
| |
| void SurfaceTracing::LayersTraceBuffer::flush(LayersTraceFileProto* fileProto) { |
| fileProto->mutable_entry()->Reserve(static_cast<int>(mStorage.size())); |
| |
| while (!mStorage.empty()) { |
| auto entry = fileProto->add_entry(); |
| entry->Swap(&mStorage.front()); |
| mStorage.pop(); |
| } |
| } |
| |
| SurfaceTracing::Runner::Runner(SurfaceFlinger& flinger, SurfaceTracing::Config& config) |
| : mFlinger(flinger), mConfig(config) { |
| mBuffer.setSize(mConfig.bufferSize); |
| } |
| |
| void SurfaceTracing::Runner::notify(const char* where) { |
| LayersTraceProto entry = traceLayers(where); |
| mBuffer.emplace(std::move(entry)); |
| } |
| |
| status_t SurfaceTracing::Runner::stop() { |
| return writeToFile(); |
| } |
| |
| status_t SurfaceTracing::Runner::writeToFile() { |
| ATRACE_CALL(); |
| |
| LayersTraceFileProto fileProto; |
| std::string output; |
| |
| fileProto.set_magic_number(uint64_t(LayersTraceFileProto_MagicNumber_MAGIC_NUMBER_H) << 32 | |
| LayersTraceFileProto_MagicNumber_MAGIC_NUMBER_L); |
| mBuffer.flush(&fileProto); |
| mBuffer.reset(mConfig.bufferSize); |
| |
| if (!fileProto.SerializeToString(&output)) { |
| ALOGE("Could not save the proto file! Permission denied"); |
| return PERMISSION_DENIED; |
| } |
| |
| // -rw-r--r-- |
| const mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH; |
| if (!android::base::WriteStringToFile(output, DEFAULT_FILE_NAME, mode, getuid(), getgid(), |
| true)) { |
| ALOGE("Could not save the proto file! There are missing fields"); |
| return PERMISSION_DENIED; |
| } |
| |
| return NO_ERROR; |
| } |
| |
| LayersTraceProto SurfaceTracing::Runner::traceLayers(const char* where) { |
| ATRACE_CALL(); |
| |
| LayersTraceProto entry; |
| entry.set_elapsed_realtime_nanos(elapsedRealtimeNano()); |
| entry.set_where(where); |
| LayersProto layers(mFlinger.dumpDrawingStateProto(mConfig.flags)); |
| |
| if (flagIsSet(SurfaceTracing::TRACE_EXTRA)) { |
| mFlinger.dumpOffscreenLayersProto(layers); |
| } |
| entry.mutable_layers()->Swap(&layers); |
| |
| if (flagIsSet(SurfaceTracing::TRACE_HWC)) { |
| std::string hwcDump; |
| mFlinger.dumpHwc(hwcDump); |
| entry.set_hwc_blob(hwcDump); |
| } |
| if (!flagIsSet(SurfaceTracing::TRACE_COMPOSITION)) { |
| entry.set_excludes_composition_state(true); |
| } |
| entry.set_missed_entries(mMissedTraceEntries); |
| |
| return entry; |
| } |
| |
| void SurfaceTracing::Runner::dump(std::string& result) const { |
| base::StringAppendF(&result, " number of entries: %zu (%.2fMB / %.2fMB)\n", |
| mBuffer.frameCount(), float(mBuffer.used()) / float(1_MB), |
| float(mBuffer.size()) / float(1_MB)); |
| } |
| |
| SurfaceTracing::AsyncRunner::AsyncRunner(SurfaceFlinger& flinger, SurfaceTracing::Config& config, |
| std::mutex& sfLock) |
| : SurfaceTracing::Runner(flinger, config), mSfLock(sfLock) { |
| mEnabled = true; |
| mThread = std::thread(&AsyncRunner::loop, this); |
| } |
| |
| void SurfaceTracing::AsyncRunner::loop() { |
| while (mEnabled) { |
| LayersTraceProto entry; |
| bool entryAdded = traceWhenNotified(&entry); |
| if (entryAdded) { |
| mBuffer.emplace(std::move(entry)); |
| } |
| if (mWriteToFile) { |
| Runner::writeToFile(); |
| mWriteToFile = false; |
| } |
| } |
| } |
| |
| bool SurfaceTracing::AsyncRunner::traceWhenNotified(LayersTraceProto* outProto) { |
| std::unique_lock<std::mutex> lock(mSfLock); |
| mCanStartTrace.wait(lock); |
| if (!mAddEntry) { |
| return false; |
| } |
| *outProto = traceLayers(mWhere); |
| mAddEntry = false; |
| mMissedTraceEntries = 0; |
| return true; |
| } |
| |
| void SurfaceTracing::AsyncRunner::notify(const char* where) { |
| std::scoped_lock lock(mSfLock); |
| notifyLocked(where); |
| } |
| |
| void SurfaceTracing::AsyncRunner::notifyLocked(const char* where) { |
| mWhere = where; |
| if (mAddEntry) { |
| mMissedTraceEntries++; |
| } |
| mAddEntry = true; |
| mCanStartTrace.notify_one(); |
| } |
| |
| status_t SurfaceTracing::AsyncRunner::writeToFile() { |
| mWriteToFile = true; |
| mCanStartTrace.notify_one(); |
| return STATUS_OK; |
| } |
| |
| status_t SurfaceTracing::AsyncRunner::stop() { |
| mEnabled = false; |
| mCanStartTrace.notify_one(); |
| mThread.join(); |
| return Runner::writeToFile(); |
| } |
| |
| } // namespace android |