Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / Diagnostics / Debugger.cs / 1 / Debugger.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== // The Debugger class is a part of the System.Diagnostics package // and is used for communicating with a debugger. namespace System.Diagnostics { using System; using System.IO; using System.Collections; using System.Reflection; using System.Runtime.CompilerServices; using System.Security; using System.Security.Permissions; // No data, does not need to be marked with the serializable attribute [System.Runtime.InteropServices.ComVisible(true)] public sealed class Debugger { // Break causes a breakpoint to be signalled to an attached debugger. If no debugger // is attached, the user is asked if he wants to attach a debugger. If yes, then the // debugger is launched. public static void Break() { if (!IsDebuggerAttached()) { // Try and demand UnmanagedCodePermission. This is done in a try block because if this // fails we want to be able to silently eat the exception and just return so // that the call to Break does not possibly cause an unhandled exception. // The idea here is that partially trusted code shouldn't be able to launch a debugger // without the user going through Watson. try { new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Demand(); } // If we enter this block, we do not have permission to break into the debugger // and so we just return. catch (SecurityException) { return; } } // Causing a break is now allowed. BreakInternal(); } static void BreakCanThrow() { if (!IsDebuggerAttached()) { new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Demand(); } // Causing a break is now allowed. BreakInternal(); } [MethodImplAttribute(MethodImplOptions.InternalCall)] private static extern void BreakInternal(); // Launch launches & attaches a debugger to the process. If a debugger is already attached, // nothing happens. // public static bool Launch() { if (IsDebuggerAttached()) return (true); // Try and demand UnmanagedCodePermission. This is done in a try block because if this // fails we want to be able to silently eat the exception and just return so // that the call to Break does not possibly cause an unhandled exception. // The idea here is that partially trusted code shouldn't be able to launch a debugger // without the user going through Watson. try { new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Demand(); } // If we enter this block, we do not have permission to break into the debugger // and so we just return. catch (SecurityException) { return (false); } // Causing the debugger to launch is now allowed. return (LaunchInternal()); } [MethodImplAttribute(MethodImplOptions.InternalCall)] private static extern bool LaunchInternal(); // Returns whether or not a debugger is attached to the process. // public static bool IsAttached { get { return IsDebuggerAttached(); } } [MethodImplAttribute(MethodImplOptions.InternalCall)] private static extern bool IsDebuggerAttached(); // Constants representing the importance level of messages to be logged. // // An attached debugger can enable or disable which messages will // actually be reported to the user through the COM+ debugger // services API. This info is communicated to the runtime so only // desired events are actually reported to the debugger. // // Constant representing the default category public static readonly String DefaultCategory = null; // Posts a message for the attached debugger. If there is no // debugger attached, has no effect. The debugger may or may not // report the message depending on its settings. [MethodImplAttribute(MethodImplOptions.InternalCall)] public static extern void Log(int level, String category, String message); // Checks to see if an attached debugger has logging enabled // [MethodImplAttribute(MethodImplOptions.InternalCall)] public static extern bool IsLogging(); } }
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