gamedevlists-linux

RE: [GD-Linux] watch/awatch?

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

Works fine here with GNU gdb 20010813 (MI_OUT) which comes with Mandrake
8.1.

- Daniel Vogel, Programmer, Epic Games Inc.

> -----Original Message-----
> From: gam...@li...
> [mailto:gam...@li...]On Behalf Of Ryan
> C. Gordon
> Sent: Friday, November 16, 2001 1:55 AM
> To: gam...@li...
> Subject: [GD-Linux] watch/awatch?
>
>
>
> Has anyone actually gotten "watch", "rwatch" or "awatch" to work on
> GDB/Linux/x86?
>
> These commands seem to be to be broken/useless in gdb 5.0, but maybe I'm
> just using them wrong...?
>
> for example:
>
> #include <stdio.h>
>
> int main(void)
> {
>     int x;
>
>     x = 5;
>     x = 10;
>     x = 15;
>
>     return(0);
> }
>
> Compile:
>
>    gcc -g -o ./x ./x.c
>    gdb ./x
>
>
>    b main
>    r
>    watch x != 5
>    c
>
> Doesn't stop until main returns.
>
> (*shrug*)
>
> --ryan.
>
>
>
>
>
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> Gamedevlists-linux mailing list
> Gam...@li...
> https://lists.sourceforge.net/lists/listinfo/gamedevlists-linux
>

Re: [GD-Linux] watch/awatch?

[Ryan C. G. <ic...@cl...>]

(Said Steve Baker in an email presumably meant for the list:  :)  )
> It's a long-shot but yaybe the compiler optimised out all those
> useless assignments?


0x80483c6 <main+6>:	movl   $0x5,0xfffffffc(%ebp)
0x80483cd <main+13>:	movl   $0xa,0xfffffffc(%ebp)
0x80483d4 <main+20>:	movl   $0xf,0xfffffffc(%ebp)

They are definitely there.

I'm willing to believe that my GDB is old/buggy/miscompiled, since Daniel
is having more luck than I. I'll try a CVS version of GDB later and report
back. I remember having miseries with this when working on Descent3, too,
though...it will definitely be nice to be able to track an arbitrary chunk
of memory though a jazillion lines of code, though.

--ryan.