Re: watchpoint hangs.

[Guillaume Yziquel <guillaume.yziquel@citycable.ch>]

Jan Kratochvil a écrit :
> On Sat, 02 Jan 2010 21:55:24 +0100, Guillaume Yziquel wrote:
>
>>> (gdb) print box
>>> $1 = {0x0 <repeats 64 times>}
>>> (gdb) watch box
>>> Watchpoint 2: box
>>> (gdb) continue
>>> Continuing.
>>
>> And it eats up 90% of one of my CPU from now on...
> 
> As it printed "Watchpoint" and not "Hardware watchpoint" it means it had to
> use software watchpoint for some reason.  Therefore it needs to singlestep the
> code which should work but it is very very slow.
> 
> On amd64 (x86_64) there are only 4 hardware watch registers with 8 bytes range
> each, that is 32 bytes of maximum hardware-watchable bytes of memory.
> 
> According to "{0x0 <repeats 64 times>}" your requested memory range is
> probably larger.
> 
> Try to reduce the watched memory range in your specific debugging case.
> 
> Regards,
> Jan

Thank you so much. This has helped tremendously. Symbol collision issue 
detected and solved.

By the way, completely off-topic: moving to git is indeed a very very 
worthwile solution. It takes quite some pain at the beginning, but it's 
totally worth it.

-- 
      Guillaume Yziquel
http://yziquel.homelinux.org/