Re: [Mingw-users] Trap to the debugger?

[Jeremy B. <je...@de...>]

Background:  I came to mingw from the NeXT compiler.  NeXT's version of gdb
had a feature called future-break, which was real handy, it would let you
set a breakpoint in a dll and then it would hold it until the dll loaded and
then set the breakpoint.

My problem is that I have some dll functions that I need to break on, but
since the dll's are runtime loaded, I can't set the breakpoint on them until
it's too late, and with the state of ctrl-c handling in gdb, it wasn't
likely that I was able to catch it in time.

Here is my solution:

Ok, imagine I have a program called main, and a dll called debug, and a dll
called runtimecode.  My debug dll has one function which is called
breakpoint.  It is a empty function that does nothing.  Main links against
debug-dll at compile time, but loads runtimecode using LoadLibrary().  So in
my .gdbinit I have this code:

b main
comm
b debugging.c:breakpoint
c
end

The runtimecode dll also links against the debug-dll at compile time, and
whenever I need to stop somewhere I just add a call to the breakpoint()
function.

It works good for me, but I still wish we had a future-break function, and I
wish that breakpoints in dll's would stick around after stopping and
re-running the program. I also wish that you could nest the "command"
command in gdb, but alas you cannot.

----- Original Message ----- 
From: "Duncan Murdoch" <mi...@mu...>
To: <min...@li...>
Sent: Thursday, October 23, 2003 9:33 AM
Subject: [Mingw-users] Trap to the debugger?


> Is there a simple function or macro to put into code to trap to the
> debugger (using Insight on top of gdb)?
>
> I've tried DebugBreak (a windows.h function), but it traps first
> somewhere in the Windows library, and I need to single step to get
> into my own code.  I'd like Insight to stop right on the source line
> that asked for the trap.
>
> Duncan Murdoch
>
>
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