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/*
* Copyright (C) 2025 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <stdio.h>
#include <wtf/FilePrintStream.h>
#include <wtf/HashMap.h>
#include <wtf/Lock.h>
#include <wtf/NeverDestroyed.h>
#include <wtf/TZoneMalloc.h>
#include <wtf/WorkQueue.h>
#include <wtf/text/CString.h>
namespace JSC {
#define JSC_PROFILER_SUPPORT_CATEGORY(macro) \
macro(JSGlobalObjectSignpost) \
class ProfilerSupport {
WTF_MAKE_TZONE_ALLOCATED(ProfilerSupport);
WTF_MAKE_NONCOPYABLE(ProfilerSupport);
friend class LazyNeverDestroyed<ProfilerSupport>;
public:
enum class Category : uint8_t {
#define JSC_DEFINE_CATEGORY(name) name,
JSC_PROFILER_SUPPORT_CATEGORY(JSC_DEFINE_CATEGORY)
#undef JSC_DEFINE_CATEGORY
};
#define JSC_COUNT_CATEGORY(name) + 1
static constexpr unsigned numberOfCategories = 0 JSC_PROFILER_SUPPORT_CATEGORY(JSC_COUNT_CATEGORY);
#undef JSC_COUNT_CATEGORY
static void markStart(const void*, Category, CString&&);
static void markEnd(const void*, Category, CString&&);
static void mark(const void*, Category, CString&&);
WorkQueue& queue() { return m_queue.get(); }
static uint64_t generateTimestamp();
static ProfilerSupport& singleton();
private:
ProfilerSupport();
void write(const AbstractLocker&, uint64_t start, uint64_t end, const CString& message) WTF_REQUIRES_LOCK(m_lock);
const Ref<WorkQueue> m_queue;
std::unique_ptr<FilePrintStream> m_fileStream;
std::array<HashMap<const void*, uint64_t>, numberOfCategories> m_markers;
int m_fd { -1 };
Lock m_tableLock;
Lock m_lock;
};
} // namespace JSC
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