Debugger.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FX-1434 / FX-1434 / 1.0 / 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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