126 lines
4.9 KiB
C++
126 lines
4.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "ProfilerBacktrace.h"
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#include "BaseProfiler.h"
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#include "ProfileBuffer.h"
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#include "ProfiledThreadData.h"
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#include "ThreadInfo.h"
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#include "mozilla/BaseProfileJSONWriter.h"
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namespace mozilla {
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namespace baseprofiler {
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ProfilerBacktrace::ProfilerBacktrace(
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const char* aName,
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UniquePtr<ProfileChunkedBuffer> aProfileChunkedBufferStorage,
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UniquePtr<ProfileBuffer> aProfileBufferStorageOrNull /* = nullptr */)
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: mName(aName),
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mOptionalProfileChunkedBufferStorage(
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std::move(aProfileChunkedBufferStorage)),
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mProfileChunkedBuffer(mOptionalProfileChunkedBufferStorage.get()),
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mOptionalProfileBufferStorage(std::move(aProfileBufferStorageOrNull)),
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mProfileBuffer(mOptionalProfileBufferStorage.get()) {
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if (mProfileBuffer) {
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MOZ_RELEASE_ASSERT(mProfileChunkedBuffer,
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"If we take ownership of a ProfileBuffer, we must also "
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"receive ownership of a ProfileChunkedBuffer");
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MOZ_RELEASE_ASSERT(
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mProfileChunkedBuffer == &mProfileBuffer->UnderlyingChunkedBuffer(),
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"If we take ownership of a ProfileBuffer, we must also receive "
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"ownership of its ProfileChunkedBuffer");
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}
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MOZ_ASSERT(
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!mProfileChunkedBuffer || !mProfileChunkedBuffer->IsThreadSafe(),
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"ProfilerBacktrace only takes a non-thread-safe ProfileChunkedBuffer");
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}
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ProfilerBacktrace::ProfilerBacktrace(
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const char* aName,
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ProfileChunkedBuffer* aExternalProfileChunkedBufferOrNull /* = nullptr */,
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ProfileBuffer* aExternalProfileBufferOrNull /* = nullptr */)
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: mName(aName),
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mProfileChunkedBuffer(aExternalProfileChunkedBufferOrNull),
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mProfileBuffer(aExternalProfileBufferOrNull) {
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if (!mProfileChunkedBuffer) {
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if (mProfileBuffer) {
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// We don't have a ProfileChunkedBuffer but we have a ProfileBuffer, use
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// the latter's ProfileChunkedBuffer.
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mProfileChunkedBuffer = &mProfileBuffer->UnderlyingChunkedBuffer();
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MOZ_ASSERT(!mProfileChunkedBuffer->IsThreadSafe(),
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"ProfilerBacktrace only takes a non-thread-safe "
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"ProfileChunkedBuffer");
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}
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} else {
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if (mProfileBuffer) {
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MOZ_RELEASE_ASSERT(
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mProfileChunkedBuffer == &mProfileBuffer->UnderlyingChunkedBuffer(),
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"If we reference both ProfileChunkedBuffer and ProfileBuffer, they "
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"must already be connected");
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}
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MOZ_ASSERT(!mProfileChunkedBuffer->IsThreadSafe(),
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"ProfilerBacktrace only takes a non-thread-safe "
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"ProfileChunkedBuffer");
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}
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}
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ProfilerBacktrace::~ProfilerBacktrace() {}
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BaseProfilerThreadId ProfilerBacktrace::StreamJSON(
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SpliceableJSONWriter& aWriter, const TimeStamp& aProcessStartTime,
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UniqueStacks& aUniqueStacks) {
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BaseProfilerThreadId processedThreadId;
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// Unlike ProfiledThreadData::StreamJSON, we don't need to call
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// ProfileBuffer::AddJITInfoForRange because ProfileBuffer does not contain
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// any JitReturnAddr entries. For synchronous samples, JIT frames get expanded
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// at sample time.
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if (mProfileBuffer) {
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processedThreadId = StreamSamplesAndMarkers(
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mName.c_str(), BaseProfilerThreadId{}, *mProfileBuffer, aWriter, "", "",
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aProcessStartTime,
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/* aRegisterTime */ TimeStamp(),
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/* aUnregisterTime */ TimeStamp(),
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/* aSinceTime */ 0, aUniqueStacks);
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} else if (mProfileChunkedBuffer) {
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ProfileBuffer profileBuffer(*mProfileChunkedBuffer);
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processedThreadId = StreamSamplesAndMarkers(
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mName.c_str(), BaseProfilerThreadId{}, profileBuffer, aWriter, "", "",
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aProcessStartTime,
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/* aRegisterTime */ TimeStamp(),
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/* aUnregisterTime */ TimeStamp(),
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/* aSinceTime */ 0, aUniqueStacks);
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}
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// If there are no buffers, the backtrace is empty and nothing is streamed.
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return processedThreadId;
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}
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} // namespace baseprofiler
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// static
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template <typename Destructor>
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UniquePtr<baseprofiler::ProfilerBacktrace, Destructor>
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ProfileBufferEntryReader::
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Deserializer<UniquePtr<baseprofiler::ProfilerBacktrace, Destructor>>::Read(
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ProfileBufferEntryReader& aER) {
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auto profileChunkedBuffer = aER.ReadObject<UniquePtr<ProfileChunkedBuffer>>();
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if (!profileChunkedBuffer) {
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return nullptr;
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}
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MOZ_ASSERT(
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!profileChunkedBuffer->IsThreadSafe(),
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"ProfilerBacktrace only stores non-thread-safe ProfileChunkedBuffers");
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std::string name = aER.ReadObject<std::string>();
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return UniquePtr<baseprofiler::ProfilerBacktrace, Destructor>{
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new baseprofiler::ProfilerBacktrace(name.c_str(),
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std::move(profileChunkedBuffer))};
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};
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} // namespace mozilla
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