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-rw-r--r--tools/profiler/core/ProfilerBacktrace.cpp101
1 files changed, 101 insertions, 0 deletions
diff --git a/tools/profiler/core/ProfilerBacktrace.cpp b/tools/profiler/core/ProfilerBacktrace.cpp
new file mode 100644
index 0000000000..a264d85d64
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+++ b/tools/profiler/core/ProfilerBacktrace.cpp
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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 "ProfileBuffer.h"
+#include "ProfiledThreadData.h"
+
+#include "mozilla/ProfileJSONWriter.h"
+
+ProfilerBacktrace::ProfilerBacktrace(
+ const char* aName,
+ mozilla::UniquePtr<mozilla::ProfileChunkedBuffer>
+ aProfileChunkedBufferStorage,
+ mozilla::UniquePtr<ProfileBuffer>
+ aProfileBufferStorageOrNull /* = nullptr */)
+ : mName(aName),
+ mOptionalProfileChunkedBufferStorage(
+ std::move(aProfileChunkedBufferStorage)),
+ mProfileChunkedBuffer(mOptionalProfileChunkedBufferStorage.get()),
+ mOptionalProfileBufferStorage(std::move(aProfileBufferStorageOrNull)),
+ mProfileBuffer(mOptionalProfileBufferStorage.get()) {
+ MOZ_COUNT_CTOR(ProfilerBacktrace);
+ 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,
+ mozilla::ProfileChunkedBuffer* aExternalProfileChunkedBuffer,
+ ProfileBuffer* aExternalProfileBuffer)
+ : mName(aName),
+ mProfileChunkedBuffer(aExternalProfileChunkedBuffer),
+ mProfileBuffer(aExternalProfileBuffer) {
+ MOZ_COUNT_CTOR(ProfilerBacktrace);
+ 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() { MOZ_COUNT_DTOR(ProfilerBacktrace); }
+
+ProfilerThreadId ProfilerBacktrace::StreamJSON(
+ SpliceableJSONWriter& aWriter, const mozilla::TimeStamp& aProcessStartTime,
+ UniqueStacks& aUniqueStacks) {
+ ProfilerThreadId 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(), ProfilerThreadId{}, *mProfileBuffer, aWriter, ""_ns,
+ ""_ns, aProcessStartTime,
+ /* aRegisterTime */ mozilla::TimeStamp(),
+ /* aUnregisterTime */ mozilla::TimeStamp(),
+ /* aSinceTime */ 0, aUniqueStacks, mozilla::ProgressLogger{});
+ } else if (mProfileChunkedBuffer) {
+ ProfileBuffer profileBuffer(*mProfileChunkedBuffer);
+ processedThreadId = StreamSamplesAndMarkers(
+ mName.c_str(), ProfilerThreadId{}, profileBuffer, aWriter, ""_ns, ""_ns,
+ aProcessStartTime,
+ /* aRegisterTime */ mozilla::TimeStamp(),
+ /* aUnregisterTime */ mozilla::TimeStamp(),
+ /* aSinceTime */ 0, aUniqueStacks, mozilla::ProgressLogger{});
+ }
+ // If there are no buffers, the backtrace is empty and nothing is streamed.
+
+ return processedThreadId;
+}