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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
#ifndef __SAMPLEPROFILER_H__
#define __SAMPLEPROFILER_H__
#ifdef FEATURE_PERFTRACING
#include "common.h"
#include "eventpipe.h"
enum class SampleProfilerSampleType
{
Error = 0,
External = 1,
Managed = 2
};
class SampleProfiler
{
// Declare friends.
friend class EventPipe;
friend class SampleProfilerEventInstance;
public:
// Enable profiling.
static void Enable();
// Disable profiling.
static void Disable();
// Set the sampling rate.
static void SetSamplingRate(long nanoseconds);
private:
// Iterate through all managed threads and walk all stacks.
static void WalkManagedThreads();
// Profiling thread proc. Invoked on a new thread when profiling is enabled.
static DWORD WINAPI ThreadProc(void *args);
// True when profiling is enabled.
static Volatile<BOOL> s_profilingEnabled;
// The sampling thread.
static Thread *s_pSamplingThread;
// The provider and event emitted by the profiler.
static const GUID s_providerID;
static EventPipeProvider *s_pEventPipeProvider;
static EventPipeEvent *s_pThreadTimeEvent;
// Event payloads.
// External represents a sample in external or native code.
// Managed represents a sample in managed code.
static BYTE *s_pPayloadExternal;
static BYTE *s_pPayloadManaged;
static const unsigned int c_payloadSize = sizeof(unsigned int);
// Thread shutdown event for synchronization between Disable() and the sampling thread.
static CLREventStatic s_threadShutdownEvent;
// The sampling rate.
static long s_samplingRateInNs;
};
#endif // FEATURE_PERFTRACING
#endif // __SAMPLEPROFILER_H__
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