RE: [GD-General] Is it possible to detect debugging?

[Daniel V. <vo...@ep...>]

UBOOL appIsDebuggerPresent()
{
	UBOOL Result = 0;
	OSVERSIONINFO WinVersion;

	HINSTANCE KernLib =  LoadLibraryEx( TEXT("kernel32.dll"), NULL, 0);
	if( KernLib )
	{
		FARPROC lIsDebuggerPresent = GetProcAddress( KernLib,
"IsDebuggerPresent" );
		if( lIsDebuggerPresent && lIsDebuggerPresent() )
			Result = 1;

		FreeLibrary( KernLib );
	}
	return Result;
}

-- Daniel, Epic Games Inc. 

> -----Original Message-----
> From: gam...@li... 
> [mailto:gam...@li...] On 
> Behalf Of Colin Fahey
> Sent: Thursday, October 09, 2003 12:59 PM
> To: gam...@li...
> Subject: [GD-General] Is it possible to detect debugging?
> 
> 
> 
> Can a Windows application determine if it is being debugged?
> Naturally it can't do anything if it has been suspended at a 
> breakpoint, 
> but I'm wondering if there is a way, during execution, to 
> check for debugging.
> 
> Sorry, it has been a while since I was in to Windows process 
> information
> stuff, so I forget all the cool things a process can do.
> 
> Anyhow, let's say the application is started.  Meanwhile, 
> something like
> Visual C++ has already been started, or is now started.  Some time 
> during the execution of the application, the user of Visual C++ uses 
> the "Attach to Process..." option, and selects the application.
> Is there any way for the application to detect that it is 
> being debugged,
> assuming it has not been immediately paused?
> 
> The method cannot depend on any particular debugger (like 
> checking for 
> certain states of, say, Visual Studio).  But I assume that 
> many debuggers
> work the same way -- although the 1337 haX0r might run the 
> whole app in 
> an 80x86 emulator...
> 
> I don't really have any particular objective, like popping up a dialog
> to embarrass the first haX0r who attempts to crack my application.
> I'm just making conversation.  Relax!  Talk amongst yourselves!
> 
> --- Colin
> 
> cp...@ea...
> 
> 
> 
> 
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