Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Core / System / Diagnostics / Eventing / Reader / EventLogRecord.cs / 1305376 / EventLogRecord.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== /*============================================================ ** ** Class: EventLogRecord ** ** Purpose: ** This public class is an EventLog implementation of EventRecord. An ** instance of this is obtained from an EventLogReader. ** ============================================================*/ using System; using System.Collections; using System.Collections.Generic; using System.Text; using System.Security.Permissions; using Microsoft.Win32; namespace System.Diagnostics.Eventing.Reader { [System.Security.Permissions.HostProtection(MayLeakOnAbort = true)] public class EventLogRecord : EventRecord { private const int SYSTEM_PROPERTY_COUNT = 18; // // access to the data member reference is safe, while // invoking methods on it is marked SecurityCritical as appropriate. // [System.Security.SecuritySafeCritical] private EventLogHandle handle; private EventLogSession session; private NativeWrapper.SystemProperties systemProperties; private string containerChannel; private int[] matchedQueryIds; //a dummy object which is used only for the locking. object syncObject; //cached DisplayNames for each instance private string levelName = null; private string taskName = null; private string opcodeName = null; private IEnumerablekeywordsNames = null; //cached DisplayNames for each instance private bool levelNameReady; private bool taskNameReady; private bool opcodeNameReady; private ProviderMetadataCachedInformation cachedMetadataInformation; // marking as TreatAsSafe because just passing around a reference to an EventLogHandle is safe. [System.Security.SecuritySafeCritical] internal EventLogRecord(EventLogHandle handle, EventLogSession session, ProviderMetadataCachedInformation cachedMetadataInfo) { this.cachedMetadataInformation = cachedMetadataInfo; this.handle = handle; this.session = session; systemProperties = new NativeWrapper.SystemProperties(); syncObject = new object(); } internal EventLogHandle Handle { // just returning reference to security critical type, the methods // of that type are protected by SecurityCritical as appropriate. [System.Security.SecuritySafeCritical] get { return handle; } } internal void PrepareSystemData() { if (this.systemProperties.filled) return; //prepare the System Context, if it is not already initialized. this.session.SetupSystemContext(); lock (this.syncObject) { if (this.systemProperties.filled == false) { NativeWrapper.EvtRenderBufferWithContextSystem(this.session.renderContextHandleSystem, this.handle, UnsafeNativeMethods.EvtRenderFlags.EvtRenderEventValues, this.systemProperties, SYSTEM_PROPERTY_COUNT); this.systemProperties.filled = true; } } } public override int Id { get { PrepareSystemData(); if (this.systemProperties.Id == null) return 0; return (int)this.systemProperties.Id; } } public override byte? Version { get { PrepareSystemData(); return this.systemProperties.Version; } } public override int? Qualifiers { get { PrepareSystemData(); return (int?)(uint?)this.systemProperties.Qualifiers; } } public override byte? Level { get { PrepareSystemData(); return this.systemProperties.Level; } } public override int? Task { get { PrepareSystemData(); return (int?)(uint?)this.systemProperties.Task; } } public override short? Opcode { get { PrepareSystemData(); return (short?)(ushort?)this.systemProperties.Opcode; } } public override long? Keywords { get { PrepareSystemData(); return (long?)this.systemProperties.Keywords; } } public override long? RecordId { get { PrepareSystemData(); return (long?)this.systemProperties.RecordId; } } public override string ProviderName { get { PrepareSystemData(); return this.systemProperties.ProviderName; } } public override Guid? ProviderId { get { PrepareSystemData(); return this.systemProperties.ProviderId; } } public override string LogName { get { PrepareSystemData(); return this.systemProperties.ChannelName; } } public override int? ProcessId { get { PrepareSystemData(); return (int?)this.systemProperties.ProcessId; } } public override int? ThreadId { get { PrepareSystemData(); return (int?)this.systemProperties.ThreadId; } } public override string MachineName { get { PrepareSystemData(); return this.systemProperties.ComputerName; } } public override System.Security.Principal.SecurityIdentifier UserId { get { PrepareSystemData(); return this.systemProperties.UserId; } } public override DateTime? TimeCreated { get { PrepareSystemData(); return this.systemProperties.TimeCreated; } } public override Guid? ActivityId { get { PrepareSystemData(); return this.systemProperties.ActivityId; } } public override Guid? RelatedActivityId { get { PrepareSystemData(); return this.systemProperties.RelatedActivityId; } } public string ContainerLog { get { if (this.containerChannel != null) return this.containerChannel; lock (this.syncObject) { if (this.containerChannel == null) { this.containerChannel = (string)NativeWrapper.EvtGetEventInfo(this.Handle, UnsafeNativeMethods.EvtEventPropertyId.EvtEventPath); } return this.containerChannel; } } } public IEnumerable MatchedQueryIds { get { if (this.matchedQueryIds != null) return this.matchedQueryIds; lock (this.syncObject) { if (this.matchedQueryIds == null) { this.matchedQueryIds = (int[])NativeWrapper.EvtGetEventInfo(this.Handle, UnsafeNativeMethods.EvtEventPropertyId.EvtEventQueryIDs); } return this.matchedQueryIds; } } } public override EventBookmark Bookmark { [System.Security.SecuritySafeCritical] get { EventLogPermissionHolder.GetEventLogPermission().Demand(); EventLogHandle bookmarkHandle = NativeWrapper.EvtCreateBookmark(null); NativeWrapper.EvtUpdateBookmark(bookmarkHandle, this.handle); string bookmarkText = NativeWrapper.EvtRenderBookmark(bookmarkHandle); return new EventBookmark(bookmarkText); } } public override string FormatDescription() { return this.cachedMetadataInformation.GetFormatDescription(this.ProviderName, this.handle); } public override string FormatDescription(IEnumerable
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