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// Copyright 2020 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_LIBPLATFORM_TRACING_RECORDER_H_
#define V8_LIBPLATFORM_TRACING_RECORDER_H_
#include <stdint.h>
#include "include/libplatform/v8-tracing.h"
#if !defined(V8_ENABLE_SYSTEM_INSTRUMENTATION)
#error "only include this file if V8_ENABLE_SYSTEM_INSTRUMENTATION"
#endif
#if V8_OS_MACOSX
#include <os/signpost.h>
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunguarded-availability"
#endif
#if V8_OS_WIN
#ifndef V8_ETW_GUID
#define V8_ETW_GUID \
0x57277741, 0x3638, 0x4A4B, 0xBD, 0xBA, 0x0A, 0xC6, 0xE4, 0x5D, 0xA5, 0x6C
#endif
#endif
namespace v8 {
namespace platform {
namespace tracing {
// This class serves as a base class for emitting events to system event
// controllers: ETW for Windows, Signposts on Mac (to be implemented). It is
// enabled by turning on both the ENABLE_SYSTEM_INSTRUMENTATION build flag and
// the --enable-system-instrumentation command line flag. When enabled, it is
// called from within SystemInstrumentationTraceWriter and replaces the
// JSONTraceWriter for event-tracing.
class V8_PLATFORM_EXPORT Recorder {
public:
Recorder();
~Recorder();
bool IsEnabled();
bool IsEnabled(const uint8_t level);
void AddEvent(TraceObject* trace_event);
private:
#if V8_OS_MACOSX
os_log_t v8Provider;
#endif
};
} // namespace tracing
} // namespace platform
} // namespace v8
#if V8_OS_MACOSX
#pragma clang diagnostic pop
#endif
#endif // V8_LIBPLATFORM_TRACING_RECORDER_H_
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