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