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/* 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 */
// The Gecko Profiler is an always-on profiler that takes fast and low overhead
// samples of the program execution using only userspace functionality for
// portability. The goal of this module is to provide performance data in a
// generic cross-platform way without requiring custom tools or kernel support.
// Samples are collected to form a timeline with optional timeline event
// (markers) used for filtering. The samples include both native stacks and
// platform-independent "label stack" frames.
#ifndef ProfileAdditionalInformation_h
#define ProfileAdditionalInformation_h
#include "shared-libraries.h"
#include "js/Value.h"
#include "nsString.h"
namespace IPC {
class MessageReader;
class MessageWriter;
template <typename T>
struct ParamTraits;
} // namespace IPC
namespace mozilla {
// This structure contains additional information gathered while generating the
// profile json and iterating the buffer.
struct ProfileGenerationAdditionalInformation {
ProfileGenerationAdditionalInformation() = default;
explicit ProfileGenerationAdditionalInformation(
const SharedLibraryInfo&& aSharedLibraries)
: mSharedLibraries(aSharedLibraries) {}
size_t SizeOf() const { return mSharedLibraries.SizeOf(); }
void Append(ProfileGenerationAdditionalInformation&& aOther) {
void FinishGathering() { mSharedLibraries.DeduplicateEntries(); }
void ToJSValue(JSContext* aCx, JS::MutableHandle<JS::Value> aRetVal) const;
SharedLibraryInfo mSharedLibraries;
struct ProfileAndAdditionalInformation {
ProfileAndAdditionalInformation() = default;
explicit ProfileAndAdditionalInformation(const nsCString&& aProfile)
: mProfile(aProfile) {}
const nsCString&& aProfile,
const ProfileGenerationAdditionalInformation&& aAdditionalInformation)
: mProfile(aProfile),
mAdditionalInformation(Some(aAdditionalInformation)) {}
size_t SizeOf() const {
size_t size = mProfile.Length();
if (mAdditionalInformation.isSome()) {
size += mAdditionalInformation->SizeOf();
return size;
nsCString mProfile;
Maybe<ProfileGenerationAdditionalInformation> mAdditionalInformation;
} // namespace mozilla
namespace IPC {
template <>
struct ParamTraits<mozilla::ProfileGenerationAdditionalInformation> {
typedef mozilla::ProfileGenerationAdditionalInformation paramType;
static void Write(MessageWriter* aWriter, const paramType& aParam);
static bool Read(MessageReader* aReader, paramType* aResult);
} // namespace IPC
#endif // ProfileAdditionalInformation_h