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/*
* 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 <android-base/file.h>
#include <log/log.h>
#include <utils/SystemClock.h>
#include <utils/Trace.h>
namespace android {
void SurfaceTracing::enable() {
ATRACE_CALL();
std::lock_guard<std::mutex> protoGuard(mTraceMutex);
if (mEnabled) {
return;
}
mEnabled = true;
mTrace = std::make_unique<LayersTraceFileProto>();
mTrace->set_magic_number(uint64_t(LayersTraceFileProto_MagicNumber_MAGIC_NUMBER_H) << 32 |
LayersTraceFileProto_MagicNumber_MAGIC_NUMBER_L);
}
status_t SurfaceTracing::disable() {
ATRACE_CALL();
std::lock_guard<std::mutex> protoGuard(mTraceMutex);
if (!mEnabled) {
return NO_ERROR;
}
mEnabled = false;
status_t err(writeProtoFileLocked());
ALOGE_IF(err == PERMISSION_DENIED, "Could not save the proto file! Permission denied");
ALOGE_IF(err == NOT_ENOUGH_DATA, "Could not save the proto file! There are missing fields");
mTrace.reset();
return err;
}
bool SurfaceTracing::isEnabled() const {
std::lock_guard<std::mutex> protoGuard(mTraceMutex);
return mEnabled;
}
void SurfaceTracing::traceLayers(const char* where, LayersProto layers) {
std::lock_guard<std::mutex> protoGuard(mTraceMutex);
if (!mEnabled) {
return;
}
LayersTraceProto* entry = mTrace->add_entry();
entry->set_elapsed_realtime_nanos(elapsedRealtimeNano());
entry->set_where(where);
entry->mutable_layers()->Swap(&layers);
constexpr int maxBufferedEntryCount = 3600;
if (mTrace->entry_size() >= maxBufferedEntryCount) {
// TODO: flush buffered entries without disabling tracing
ALOGE("too many buffered frames; force disable tracing");
mEnabled = false;
writeProtoFileLocked();
mTrace.reset();
}
}
status_t SurfaceTracing::writeProtoFileLocked() {
ATRACE_CALL();
if (!mTrace->IsInitialized()) {
return NOT_ENOUGH_DATA;
}
std::string output;
if (!mTrace->SerializeToString(&output)) {
return PERMISSION_DENIED;
}
if (!android::base::WriteStringToFile(output, mOutputFileName, true)) {
return PERMISSION_DENIED;
}
return NO_ERROR;
}
void SurfaceTracing::dump(String8& result) const {
std::lock_guard<std::mutex> protoGuard(mTraceMutex);
result.appendFormat("Tracing state: %s\n", mEnabled ? "enabled" : "disabled");
result.appendFormat(" number of entries: %d\n", mTrace ? mTrace->entry_size() : 0);
}
} // namespace android
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