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//----------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//----------------------------------------------------------------
namespace System.Runtime
{
using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;
/// <remarks>
/// [....] (11/15/10, CSDMain 194940) - Previously, this code first checked that the opcode was set to informational. If not, it would check
/// the opcode name for start, stop, suspend, or resume and use that or return Information otherwise. This does not work well with the latest
/// ETW changes where almost every event has a task and opcode. With the old logic, if an opcode is set on the event with a level such as
/// warning or error, the level would be incorrectly reported in diagnostic tracing as informational. Also, start/stop/suspend/resume events
/// have an overloaded meaning in diagnostic tracing that the svctraceviewer would misinterpret. To keep diagnostic tracing from breaking, this
/// class now checks for start/stop/suspend/resume opcodes and returns the level if any of those do not match. Furthermore, any events defined
/// that are shared between diagnostics and ETW should not use start/stop/suspend/resume opcodes unless explicitly intended for use in
/// diagnostics tracing.
/// </remarks>
class TraceLevelHelper
{
static TraceEventType[] EtwLevelToTraceEventType = { TraceEventType.Critical, TraceEventType.Critical, TraceEventType.Error,
TraceEventType.Warning, TraceEventType.Information, TraceEventType.Verbose
};
internal static TraceEventType GetTraceEventType(byte level, byte opcode)
{
switch (opcode)
{
case (byte)TraceEventOpcode.Start:
return TraceEventType.Start;
case (byte)TraceEventOpcode.Stop:
return TraceEventType.Stop;
case (byte)TraceEventOpcode.Suspend:
return TraceEventType.Suspend;
case (byte)TraceEventOpcode.Resume:
return TraceEventType.Resume;
default:
return EtwLevelToTraceEventType[(int)level];
}
}
internal static TraceEventType GetTraceEventType(TraceEventLevel level)
{
return EtwLevelToTraceEventType[(int)level];
}
internal static TraceEventType GetTraceEventType(byte level)
{
return EtwLevelToTraceEventType[(int)level];
}
internal static string LookupSeverity(TraceEventLevel level, TraceEventOpcode opcode)
{
string severity;
switch (opcode)
{
case TraceEventOpcode.Start:
severity = "Start";
break;
case TraceEventOpcode.Stop:
severity = "Stop";
break;
case TraceEventOpcode.Suspend:
severity = "Suspend";
break;
case TraceEventOpcode.Resume:
severity = "Resume";
break;
default:
switch (level)
{
case TraceEventLevel.Critical:
severity = "Critical";
break;
case TraceEventLevel.Error:
severity = "Error";
break;
case TraceEventLevel.Warning:
severity = "Warning";
break;
case TraceEventLevel.Informational:
severity = "Information";
break;
case TraceEventLevel.Verbose:
severity = "Verbose";
break;
default:
severity = level.ToString();
break;
}
break;
}
return severity;
}
}
}
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