Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WCF / SMDiagnostics / System / ServiceModel / Diagnostics / DiagnosticTrace.cs / 1305376 / DiagnosticTrace.cs
//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------
namespace System.ServiceModel.Diagnostics
{
using System.Collections.Generic;
using System.ComponentModel;
using System.Configuration;
using System.Diagnostics;
using System.Globalization;
using System.Runtime;
using System.Runtime.Diagnostics;
using System.Security;
using System.Security.Permissions;
using System.Text;
using System.Xml;
class DiagnosticTrace
{
const string DefaultTraceListenerName = "Default";
const int MaxTraceSize = 65535;
bool tracingEnabled = true;
bool haveListeners = false;
object localSyncObject = new object(); // only used by ShouldTrace, only used once.
DateTime lastFailure = DateTime.MinValue;
SourceLevels level;
bool calledShutdown = false;
bool shouldUseActivity = false;
string AppDomainFriendlyName = null;
PiiTraceSource traceSource = null;
TraceSourceKind traceSourceType = TraceSourceKind.PiiTraceSource;
const string subType = "";
const string version = "1";
const int traceFailureLogThreshold = 1;
string TraceSourceName = string.Empty;
const string TraceRecordVersion = "http://schemas.microsoft.com/2004/10/E2ETraceEvent/TraceRecord";
const SourceLevels DefaultLevel = SourceLevels.Off;
static object classLockObject = new object();
[Fx.Tag.SecurityNote(Critical = "This determines the event source name.")]
[SecurityCritical]
string eventSourceName = string.Empty;
internal static string ProcessName
{
get
{
string retval = null;
try
{
using (Process process = Process.GetCurrentProcess())
{
retval = process.ProcessName;
}
}
catch (SecurityException)
{
}
return retval;
}
}
internal static int ProcessId
{
get
{
int retval = -1;
try
{
using (Process process = Process.GetCurrentProcess())
{
retval = process.Id;
}
}
catch (SecurityException)
{
}
return retval;
}
}
internal PiiTraceSource TraceSource
{
get
{
return this.traceSource;
}
set
{
this.traceSource = value;
}
}
SourceLevels FixLevel(SourceLevels level)
{
//the bit fixing below is meant to keep the trace level legal even if somebody uses numbers in config
if (((level & ~SourceLevels.Information) & SourceLevels.Verbose) != 0)
{
level |= SourceLevels.Verbose;
}
else if (((level & ~SourceLevels.Warning) & SourceLevels.Information) != 0)
{
level |= SourceLevels.Information;
}
else if (((level & ~SourceLevels.Error) & SourceLevels.Warning) != 0)
{
level |= SourceLevels.Warning;
}
if (((level & ~SourceLevels.Critical) & SourceLevels.Error) != 0)
{
level |= SourceLevels.Error;
}
if ((level & SourceLevels.Critical) != 0)
{
level |= SourceLevels.Critical;
}
// If only the ActivityTracing flag is set, then
// we really have Off. Do not do ActivityTracing then.
if (level == SourceLevels.ActivityTracing)
{
level = SourceLevels.Off;
}
return level;
}
void SetLevel(SourceLevels level)
{
SourceLevels fixedLevel = FixLevel(level);
this.level = fixedLevel;
if (this.TraceSource != null)
{
// Need this for setup from places like TransactionBridge.
this.haveListeners = this.TraceSource.Listeners.Count > 0;
if (this.TraceSource.Switch.Level != SourceLevels.Off &&
level == SourceLevels.Off)
{
TraceSource temp = this.TraceSource;
this.CreateTraceSource();
temp.Close();
}
#pragma warning disable 618
this.tracingEnabled = this.HaveListeners && (fixedLevel != SourceLevels.Off);
#pragma warning restore 618
this.TraceSource.Switch.Level = fixedLevel;
this.shouldUseActivity = (fixedLevel & SourceLevels.ActivityTracing) != 0;
}
}
void SetLevelThreadSafe(SourceLevels level)
{
lock (this.localSyncObject)
{
SetLevel(level);
}
}
[Obsolete("For SMDiagnostics.dll use only. Call DiagnosticUtility.Level instead")]
internal SourceLevels Level
{
//Do not call this property from Initialize!
get
{
if (this.TraceSource != null && (this.TraceSource.Switch.Level != this.level))
{
this.level = this.TraceSource.Switch.Level;
}
return this.level;
}
set
{
SetLevelThreadSafe(value);
}
}
[Obsolete("For SMDiagnostics.dll use only. Call DiagnosticUtility.HaveListeners instead")]
internal bool HaveListeners
{
get
{
return this.haveListeners;
}
}
[Obsolete("For SMDiagnostics.dll use only. Call DiagnosticUtility.ShouldTrace instead")]
internal bool ShouldTrace(TraceEventType type)
{
return this.TracingEnabled &&
(this.TraceSource != null) &&
0 != ((int)type & (int)this.Level);
}
[Obsolete("For SMDiagnostics.dll use only. Call DiagnosticUtility.ShouldUseActivity instead")]
internal bool ShouldUseActivity
{
get { return this.shouldUseActivity; }
}
[Obsolete("For SMDiagnostics.dll use only. Call DiagnosticUtility.TracingEnabled instead")]
internal bool TracingEnabled
{
get
{
return this.tracingEnabled && this.traceSource != null;
}
}
#pragma warning disable 56500
[Obsolete("For SMDiagnostics.dll use only. Never 'new' this type up unless you are DiagnosticUtility.")]
[Fx.Tag.SecurityNote(Critical = "Sets eventSourceName.")]
[SecurityCritical]
internal DiagnosticTrace(TraceSourceKind sourceType, string traceSourceName, string eventSourceName)
{
this.traceSourceType = sourceType;
this.TraceSourceName = traceSourceName;
this.eventSourceName = eventSourceName;
// We own the resource and it hasn't been filled in yet.
//needed for logging events to event log
this.AppDomainFriendlyName = AppDomain.CurrentDomain.FriendlyName;
try
{
this.CreateTraceSource();
this.UnsafeAddDomainEventHandlersForCleanup();
}
catch (ConfigurationErrorsException)
{
throw;
}
catch (Exception e)
{
if (Fx.IsFatal(e))
{
throw;
}
EventLogger logger = new EventLogger(this.eventSourceName, null);
logger.LogEvent(TraceEventType.Error, EventLogCategory.Tracing, EventLogEventId.FailedToSetupTracing, false,
e.ToString());
}
}
#pragma warning restore 56500
[SecurityCritical]
[SecurityPermission(SecurityAction.Assert, UnmanagedCode = true)]
[Obsolete("For SMDiagnostics.dll use only")]
void UnsafeAddDomainEventHandlersForCleanup()
{
AppDomain currentDomain = AppDomain.CurrentDomain;
this.haveListeners = this.TraceSource.Listeners.Count > 0;
this.tracingEnabled = this.HaveListeners;
if (this.TracingEnabled)
{
currentDomain.UnhandledException += new UnhandledExceptionEventHandler(UnhandledExceptionHandler);
this.SetLevel(this.TraceSource.Switch.Level);
currentDomain.DomainUnload += new EventHandler(ExitOrUnloadEventHandler);
currentDomain.ProcessExit += new EventHandler(ExitOrUnloadEventHandler);
}
}
[SecurityCritical]
[SecurityPermission(SecurityAction.Assert, UnmanagedCode = true)]
void UnsafeRemoveDefaultTraceListener(PiiTraceSource piiTraceSource)
{
piiTraceSource.Listeners.Remove(DiagnosticTrace.DefaultTraceListenerName);
}
[SecuritySafeCritical]
void CreateTraceSource()
{
PiiTraceSource tempSource = null;
if (this.traceSourceType == TraceSourceKind.PiiTraceSource)
{
tempSource = new PiiTraceSource(this.TraceSourceName, this.eventSourceName, DiagnosticTrace.DefaultLevel);
}
else
{
tempSource = new DiagnosticTraceSource(this.TraceSourceName, this.eventSourceName, DiagnosticTrace.DefaultLevel);
}
UnsafeRemoveDefaultTraceListener(tempSource);
this.TraceSource = tempSource;
}
#pragma warning disable 56500
internal void TraceEvent(TraceEventType type, int code, string msdnTraceCode, string description, TraceRecord trace, Exception exception, object source)
{
#pragma warning disable 618
AssertUtility.DebugAssert(exception == null || type <= TraceEventType.Information, "Exceptions should be traced at Information or higher");
AssertUtility.DebugAssert(!string.IsNullOrEmpty(description), "All TraceCodes should have a description");
#pragma warning restore 618
TraceXPathNavigator navigator = null;
try
{
#pragma warning disable 618
if (this.TraceSource != null && this.HaveListeners)
#pragma warning restore 618
{
try
{
BuildTrace(type, msdnTraceCode, description, trace, exception, source, out navigator);
}
catch (PlainXmlWriter.MaxSizeExceededException)
{
StringTraceRecord codeTraceRecord = new StringTraceRecord("TruncatedTraceId", msdnTraceCode);
this.TraceEvent(type, DiagnosticsTraceCode.TraceTruncatedQuotaExceeded, DiagnosticTrace.GenerateMsdnTraceCode("System.ServiceModel.Diagnostics", "TraceTruncatedQuotaExceeded"), TraceSR.GetString(TraceSR.TraceCodeTraceTruncatedQuotaExceeded), codeTraceRecord, null, null);
}
this.TraceSource.TraceData(type, code, navigator);
if (this.calledShutdown)
{
this.TraceSource.Flush();
}
// Must have been a successful trace.
this.LastFailure = DateTime.MinValue;
}
}
catch (Exception e)
{
if (Fx.IsFatal(e))
{
throw;
}
LogTraceFailure(navigator == null ? string.Empty : navigator.ToString(), e);
}
}
#pragma warning restore 56500
internal void TraceEvent(TraceEventType type, int code, string msdnTraceCode, string description, TraceRecord trace, Exception exception, Guid activityId, object source)
{
#pragma warning disable 618
using ((this.ShouldUseActivity && Guid.Empty != activityId) ? Activity.CreateActivity(activityId) : null)
#pragma warning restore 618
{
this.TraceEvent(type, code, msdnTraceCode, description, trace, exception, source);
}
}
// helper for standardized trace code generation
static internal string GenerateMsdnTraceCode(string traceSource, string traceCodeString)
{
return string.Format(CultureInfo.InvariantCulture,
"http://msdn.microsoft.com/{0}/library/{1}.{2}.aspx",
CultureInfo.CurrentCulture.Name,
traceSource, traceCodeString);
}
#pragma warning disable 56500
internal void TraceTransfer(Guid newId)
{
#pragma warning disable 618
if (this.ShouldUseActivity)
#pragma warning restore 618
{
Guid oldId = DiagnosticTrace.ActivityId;
if (newId != oldId)
{
#pragma warning disable 618
if (this.HaveListeners)
#pragma warning restore 618
{
try
{
this.TraceSource.TraceTransfer(0, null, newId);
}
catch (Exception e)
{
if (Fx.IsFatal(e))
{
throw;
}
LogTraceFailure(null, e);
}
}
}
}
}
#pragma warning restore 56500
static string LookupSeverity(TraceEventType type)
{
string s;
switch (type)
{
case TraceEventType.Critical:
s = "Critical";
break;
case TraceEventType.Error:
s = "Error";
break;
case TraceEventType.Warning:
s = "Warning";
break;
case TraceEventType.Information:
s = "Information";
break;
case TraceEventType.Verbose:
s = "Verbose";
break;
case TraceEventType.Start:
s = "Start";
break;
case TraceEventType.Stop:
s = "Stop";
break;
case TraceEventType.Suspend:
s = "Suspend";
break;
case TraceEventType.Transfer:
s = "Transfer";
break;
default:
s = type.ToString();
break;
}
#pragma warning disable 618
AssertUtility.DebugAssert(s == type.ToString(), "Return value should equal the name of the enum");
#pragma warning restore 618
return s;
}
DateTime LastFailure
{
get { return this.lastFailure; }
set { this.lastFailure = value; }
}
[Fx.Tag.SecurityNote(Critical = "Calls unsafe methods, UnsafeCreateEventLogger and UnsafeLogEvent.",
Safe = "Event identities cannot be spoofed as they are constants determined inside the method.")]
[SecuritySafeCritical]
void LogTraceFailure(string traceString, Exception e)
{
const int FailureBlackoutDuration = 10;
TimeSpan FailureBlackout = TimeSpan.FromMinutes(FailureBlackoutDuration);
try
{
lock (this.localSyncObject)
{
if (DateTime.UtcNow.Subtract(this.LastFailure) >= FailureBlackout)
{
this.LastFailure = DateTime.UtcNow;
#pragma warning disable 618
EventLogger logger = EventLogger.UnsafeCreateEventLogger(this.eventSourceName, this);
#pragma warning restore 618
if (e == null)
{
logger.UnsafeLogEvent(TraceEventType.Error, EventLogCategory.Tracing, EventLogEventId.FailedToTraceEvent, false,
traceString);
}
else
{
logger.UnsafeLogEvent(TraceEventType.Error, EventLogCategory.Tracing, EventLogEventId.FailedToTraceEventWithException, false,
traceString,
e.ToString());
}
}
}
}
#pragma warning suppress 56500 //[....]; Taken care of by FxCop
catch { }
}
void ShutdownTracing()
{
if (null != this.TraceSource && !this.calledShutdown)
{
try
{
#pragma warning disable 618
if (this.Level != SourceLevels.Off)
{
if (this.ShouldTrace(TraceEventType.Information))
#pragma warning restore 618
{
Dictionary values = new Dictionary(3);
values["AppDomain.FriendlyName"] = AppDomain.CurrentDomain.FriendlyName;
values["ProcessName"] = DiagnosticTrace.ProcessName;
values["ProcessId"] = DiagnosticTrace.ProcessId.ToString(CultureInfo.CurrentCulture);
this.TraceEvent(TraceEventType.Information, DiagnosticsTraceCode.AppDomainUnload, DiagnosticTrace.GenerateMsdnTraceCode("System.ServiceModel.Diagnostics", "AppDomainUnload"), TraceSR.GetString(TraceSR.TraceCodeAppDomainUnload),
new DictionaryTraceRecord(values), null, null);
}
this.calledShutdown = true;
this.TraceSource.Flush();
}
}
#pragma warning suppress 56500 //[....]; Taken care of by FxCop
catch (Exception exception)
{
if (Fx.IsFatal(exception))
{
throw;
}
LogTraceFailure(null, exception);
}
}
}
void ExitOrUnloadEventHandler(object sender, EventArgs e)
{
ShutdownTracing();
}
void UnhandledExceptionHandler(object sender, UnhandledExceptionEventArgs args)
{
Exception e = (Exception)args.ExceptionObject;
TraceEvent(TraceEventType.Critical, DiagnosticsTraceCode.UnhandledException, "UnhandledException", TraceSR.GetString(TraceSR.UnhandledException), null, e, null);
ShutdownTracing();
}
void BuildTrace(TraceEventType type, string msdnTraceCode, string description, TraceRecord trace,
Exception exception, object source, out TraceXPathNavigator navigator)
{
PlainXmlWriter xmlWriter = new PlainXmlWriter(DiagnosticTrace.MaxTraceSize);
navigator = xmlWriter.Navigator;
this.BuildTrace(xmlWriter, type, msdnTraceCode, description, trace, exception, source);
if (!this.TraceSource.ShouldLogPii)
{
navigator.RemovePii(DiagnosticStrings.HeadersPaths);
}
}
static string CreateSourceString(object source)
{
return source.GetType().ToString() + "/" + source.GetHashCode().ToString(CultureInfo.CurrentCulture);
}
void BuildTrace(PlainXmlWriter xml, TraceEventType type, string msdnTraceCode, string description,
TraceRecord trace, Exception exception, object source)
{
xml.WriteStartElement(DiagnosticStrings.TraceRecordTag);
xml.WriteAttributeString(DiagnosticStrings.NamespaceTag, DiagnosticTrace.TraceRecordVersion);
xml.WriteAttributeString(DiagnosticStrings.SeverityTag, DiagnosticTrace.LookupSeverity(type));
xml.WriteElementString(DiagnosticStrings.TraceCodeTag, msdnTraceCode);
xml.WriteElementString(DiagnosticStrings.DescriptionTag, description);
xml.WriteElementString(DiagnosticStrings.AppDomain, this.AppDomainFriendlyName);
if (source != null)
{
xml.WriteElementString(DiagnosticStrings.SourceTag, CreateSourceString(source));
}
if (trace != null)
{
xml.WriteStartElement(DiagnosticStrings.ExtendedDataTag);
xml.WriteAttributeString(DiagnosticStrings.NamespaceTag, trace.EventId);
trace.WriteTo(xml);
xml.WriteEndElement();
}
if (exception != null)
{
xml.WriteStartElement(DiagnosticStrings.ExceptionTag);
this.AddExceptionToTraceString(xml, exception);
xml.WriteEndElement();
}
xml.WriteEndElement();
}
static internal Guid ActivityId
{
get
{
return System.Runtime.Diagnostics.DiagnosticTrace.ActivityId;
}
set
{
System.Runtime.Diagnostics.DiagnosticTrace.ActivityId = value;
}
}
void AddExceptionToTraceString(XmlWriter xml, Exception exception)
{
xml.WriteElementString(DiagnosticStrings.ExceptionTypeTag, System.Runtime.Diagnostics.DiagnosticTrace.XmlEncode(exception.GetType().AssemblyQualifiedName));
xml.WriteElementString(DiagnosticStrings.MessageTag, System.Runtime.Diagnostics.DiagnosticTrace.XmlEncode(exception.Message));
xml.WriteElementString(DiagnosticStrings.StackTraceTag, System.Runtime.Diagnostics.DiagnosticTrace.XmlEncode(this.StackTraceString(exception)));
xml.WriteElementString(DiagnosticStrings.ExceptionStringTag, System.Runtime.Diagnostics.DiagnosticTrace.XmlEncode(exception.ToString()));
Win32Exception win32Exception = exception as Win32Exception;
if (win32Exception != null)
{
xml.WriteElementString(DiagnosticStrings.NativeErrorCodeTag, win32Exception.NativeErrorCode.ToString("X", CultureInfo.InvariantCulture));
}
if (exception.Data != null && exception.Data.Count > 0)
{
xml.WriteStartElement(DiagnosticStrings.DataItemsTag);
foreach (object dataItem in exception.Data.Keys)
{
xml.WriteStartElement(DiagnosticStrings.DataTag);
xml.WriteElementString(DiagnosticStrings.KeyTag, System.Runtime.Diagnostics.DiagnosticTrace.XmlEncode(dataItem.ToString()));
xml.WriteElementString(DiagnosticStrings.ValueTag, System.Runtime.Diagnostics.DiagnosticTrace.XmlEncode(exception.Data[dataItem].ToString()));
xml.WriteEndElement();
}
xml.WriteEndElement();
}
if (exception.InnerException != null)
{
xml.WriteStartElement(DiagnosticStrings.InnerExceptionTag);
this.AddExceptionToTraceString(xml, exception.InnerException);
xml.WriteEndElement();
}
}
string StackTraceString(Exception exception)
{
string retval = exception.StackTrace;
if (string.IsNullOrEmpty(retval))
{
// This means that the exception hasn't been thrown yet. We need to manufacture the stack then.
StackTrace stackTrace = new StackTrace(false);
// Figure out how many frames should be throw away
System.Diagnostics.StackFrame[] stackFrames = stackTrace.GetFrames();
int frameCount = 0;
bool breakLoop = false;
foreach (StackFrame frame in stackFrames)
{
string methodName = frame.GetMethod().Name;
switch (methodName)
{
case "StackTraceString":
case "AddExceptionToTraceString":
case "BuildTrace":
case "TraceEvent":
case "TraceException":
++frameCount;
break;
default:
if (methodName.StartsWith("ThrowHelper", StringComparison.Ordinal))
{
++ frameCount;
}
else
{
breakLoop = true;
}
break;
}
if (breakLoop)
{
break;
}
}
stackTrace = new StackTrace(frameCount, false);
retval = stackTrace.ToString();
}
return retval;
}
}
}
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