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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.
using System.Collections.Generic;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Security;
using Microsoft.Win32;
namespace System.Diagnostics.Tracing
{
[StructLayout(LayoutKind.Sequential)]
internal struct EventPipeProviderConfiguration
{
[MarshalAs(UnmanagedType.LPWStr)]
private string m_providerName;
private UInt64 m_keywords;
private uint m_loggingLevel;
internal EventPipeProviderConfiguration(
string providerName,
UInt64 keywords,
uint loggingLevel)
{
if(string.IsNullOrEmpty(providerName))
{
throw new ArgumentNullException(nameof(providerName));
}
if(loggingLevel > 5) // 5 == Verbose, the highest value in EventPipeLoggingLevel.
{
throw new ArgumentOutOfRangeException(nameof(loggingLevel));
}
m_providerName = providerName;
m_keywords = keywords;
m_loggingLevel = loggingLevel;
}
internal string ProviderName
{
get { return m_providerName; }
}
internal UInt64 Keywords
{
get { return m_keywords; }
}
internal uint LoggingLevel
{
get { return m_loggingLevel; }
}
}
internal sealed class EventPipeConfiguration
{
private string m_outputFile;
private uint m_circularBufferSizeInMB;
private List<EventPipeProviderConfiguration> m_providers;
private TimeSpan m_minTimeBetweenSamples = TimeSpan.FromMilliseconds(1);
internal EventPipeConfiguration(
string outputFile,
uint circularBufferSizeInMB)
{
if(string.IsNullOrEmpty(outputFile))
{
throw new ArgumentNullException(nameof(outputFile));
}
if(circularBufferSizeInMB == 0)
{
throw new ArgumentOutOfRangeException(nameof(circularBufferSizeInMB));
}
m_outputFile = outputFile;
m_circularBufferSizeInMB = circularBufferSizeInMB;
m_providers = new List<EventPipeProviderConfiguration>();
}
internal string OutputFile
{
get { return m_outputFile; }
}
internal uint CircularBufferSizeInMB
{
get { return m_circularBufferSizeInMB; }
}
internal EventPipeProviderConfiguration[] Providers
{
get { return m_providers.ToArray(); }
}
internal long ProfilerSamplingRateInNanoseconds
{
// 100 nanoseconds == 1 tick.
get { return m_minTimeBetweenSamples.Ticks * 100; }
}
internal void EnableProvider(string providerName, UInt64 keywords, uint loggingLevel)
{
m_providers.Add(new EventPipeProviderConfiguration(
providerName,
keywords,
loggingLevel));
}
internal void SetProfilerSamplingRate(TimeSpan minTimeBetweenSamples)
{
if(minTimeBetweenSamples.Ticks <= 0)
{
throw new ArgumentOutOfRangeException(nameof(minTimeBetweenSamples));
}
m_minTimeBetweenSamples = minTimeBetweenSamples;
}
}
internal static class EventPipe
{
internal static void Enable(EventPipeConfiguration configuration)
{
if(configuration == null)
{
throw new ArgumentNullException(nameof(configuration));
}
EventPipeProviderConfiguration[] providers = configuration.Providers;
EventPipeInternal.Enable(
configuration.OutputFile,
configuration.CircularBufferSizeInMB,
configuration.ProfilerSamplingRateInNanoseconds,
providers,
providers.Length);
}
internal static void Disable()
{
EventPipeInternal.Disable();
}
}
internal static class EventPipeInternal
{
//
// These PInvokes are used by the configuration APIs to interact with EventPipe.
//
[DllImport(JitHelpers.QCall, CharSet = CharSet.Unicode)]
internal static extern void Enable(string outputFile, uint circularBufferSizeInMB, long profilerSamplingRateInNanoseconds, EventPipeProviderConfiguration[] providers, int numProviders);
[DllImport(JitHelpers.QCall, CharSet = CharSet.Unicode)]
internal static extern void Disable();
//
// These PInvokes are used by EventSource to interact with the EventPipe.
//
[DllImport(JitHelpers.QCall, CharSet = CharSet.Unicode)]
internal static extern IntPtr CreateProvider(string providerName, UnsafeNativeMethods.ManifestEtw.EtwEnableCallback callbackFunc);
[DllImport(JitHelpers.QCall, CharSet = CharSet.Unicode)]
internal static extern unsafe IntPtr DefineEvent(IntPtr provHandle, uint eventID, Int64 keywords, uint eventVersion, uint level, void *pMetadata, uint metadataLength);
[DllImport(JitHelpers.QCall, CharSet = CharSet.Unicode)]
internal static extern void DeleteProvider(IntPtr provHandle);
[DllImport(JitHelpers.QCall, CharSet = CharSet.Unicode)]
internal static extern unsafe void WriteEvent(IntPtr eventHandle, uint eventID, void* pData, uint length, Guid* activityId, Guid* relatedActivityId);
[DllImport(JitHelpers.QCall, CharSet = CharSet.Unicode)]
internal static extern unsafe void WriteEventData(IntPtr eventHandle, uint eventID, EventProvider.EventData** pEventData, uint dataCount, Guid* activityId, Guid* relatedActivityId);
}
}
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