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Date: Wed, 27 May 2009 19:25:00 -0000
From: Eli Zaretskii <eliz@gnu.org>
Subject: Re: [RFA] Fix troubles with watchpoints in DJGPP
In-reply-to: <001401c9de9f$928b9f80$b7a2de80$@u-strasbg.fr>
To: "Pierre Muller (IMAP)" <muller@ics.u-strasbg.fr>
Cc: gdb-patches@sourceware.org
Reply-to: Eli Zaretskii <eliz@gnu.org>
Message-id: <83ab4ys5zy.fsf@gnu.org>
References: <001401c9de9f$928b9f80$b7a2de80$@u-strasbg.fr>
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> From: "Pierre Muller \(IMAP\)" <muller@ics.u-strasbg.fr>
> Date: Wed, 27 May 2009 09:48:49 +0200
> 
> 
>   I also tried to use it but I have several problems,
> some are probably DJGPP specific
> (bad file descriptor errors when trying to restart 
> a ./gdb executable at level 2, meaning inside another gdb
> itself being debugged by gdb).

Please give me some simple test program and a transcript of a GDB
session that reproduces this problem.  I debug GDB with itself a lot,
and I never saw this.

Also, on what platform (OS and version) is that?

>   After some debugging, I realized that 
> DJGPP only calls insert_breakpoints ()
> that does call update_watchpoint with reparse set to one,
> after pushing go32 target,
> while with cygwin, the DLL loaded caused a 
> reloading of all breakpoints and triggered a
> call to update_watchpoint with reparse = 1.
> 
> 
> This one line patch fixes the problem.
> 
> Is this patch OK?

Thanks, but here, too, I would like a simple test program and a
transcript of a GDB session before and after the patch.

> PS-2) Eli,
> do you have anything that could help me debug the
> Bad file descriptor problems, like a library recording
> file opening/closing using the DJGPP file system extensions?

No, but you can put a breakpoint on the respective library functions,
couldn't you?