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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/. */
/*
* Functions for controlling profilers from within JS: Valgrind, Perf, etc
*/
#ifndef builtin_Profilers_h
#define builtin_Profilers_h
#include "jstypes.h"
#ifdef _MSC_VER
typedef int pid_t;
#else
# include <unistd.h>
#endif
/**
* Start any profilers that are available and have been configured on for this
* platform. This is NOT thread safe.
*
* The profileName is used by some profilers to describe the current profiling
* run. It may be used for part of the filename of the output, but the
* specifics depend on the profiler. Many profilers will ignore it. Passing in
* nullptr is legal; some profilers may use it to output to stdout or similar.
*
* Returns true if no profilers fail to start.
*/
[[nodiscard]] extern JS_PUBLIC_API bool JS_StartProfiling(
const char* profileName, pid_t pid);
/**
* Stop any profilers that were previously started with JS_StartProfiling.
* Returns true if no profilers fail to stop.
*/
[[nodiscard]] extern JS_PUBLIC_API bool JS_StopProfiling(
const char* profileName);
/**
* Write the current profile data to the given file, if applicable to whatever
* profiler is being used.
*/
[[nodiscard]] extern JS_PUBLIC_API bool JS_DumpProfile(const char* outfile,
const char* profileName);
/**
* Pause currently active profilers (only supported by some profilers). Returns
* whether any profilers failed to pause. (Profilers that do not support
* pause/resume do not count.)
*/
[[nodiscard]] extern JS_PUBLIC_API bool JS_PauseProfilers(
const char* profileName);
/**
* Resume suspended profilers
*/
[[nodiscard]] extern JS_PUBLIC_API bool JS_ResumeProfilers(
const char* profileName);
/**
* The profiling API calls are not able to report errors, so they use a
* thread-unsafe global memory buffer to hold the last error encountered. This
* should only be called after something returns false.
*/
JS_PUBLIC_API const char* JS_UnsafeGetLastProfilingError();
#ifdef MOZ_CALLGRIND
[[nodiscard]] extern JS_PUBLIC_API bool js_StopCallgrind();
[[nodiscard]] extern JS_PUBLIC_API bool js_StartCallgrind();
[[nodiscard]] extern JS_PUBLIC_API bool js_DumpCallgrind(const char* outfile);
#endif /* MOZ_CALLGRIND */
#ifdef __linux__
[[nodiscard]] extern JS_PUBLIC_API bool js_StartPerf();
[[nodiscard]] extern JS_PUBLIC_API bool js_StopPerf();
#endif /* __linux__ */
#endif /* builtin_Profilers_h */
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