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Re: Bug with watchpoints on Linux

At 13:01 21/11/2001 , vous avez écrit:

>   There seems to be a big problem with
>hardware watchpoints under Linux.
>   If I compile a simple program :
>/* START of twatch.c */
>static int x,y;
>main ()
>   x = 5;
>   y = x * 2;
>   x = y / 2;
>   x = 7;
>   return 0;
>/* END of twatch.c */
>and set a hardware watchpoint on variable 'x',
>the debugger correctly stops at each program location where this global 
>var is changed.
>   But at the second run, the program is never stopped because
>of the changes to this global variable.
>   It seems like there is a problem with the hardware watchpoint
>   I tested this on only one Linux machine,
>but both the main and the 5.1 branches show this problem.
>   The current main CVS tree with a patch (not yet submitted)
>to add hardware watchpoints on cygwin target does not
>have this problem (It works but there are still some problems).

Whoops, I was too fast once again...

I do see the same problem in my cygwin implementation ...

>This makes me suspect that the problem is truely Linux specific.
>   Is this a known Linux problem of version 5.1 ?

   Is this a known problem for i386 hardware watches ?

Pierre Muller
Institut Charles Sadron
6,rue Boussingault
Phone : (33)-3-88-41-40-07  Fax : (33)-3-88-41-40-99

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