Re: Regression for watchpoint-fork.exp [Re: [PATCH v3 2/5] PR breakpoints/7143 - Watchpoint does not trigger when first set]

[Pedro Alves <palves@redhat.com>]

On 06/17/2014 08:18 PM, Jan Kratochvil wrote:
> On Thu, 20 Mar 2014 14:57:36 +0100, Pedro Alves wrote:
>> Here's what I pushed (nothing else changed).
> 
> 31e77af205cf6564c2bf4c18400b4ca16bdf92cd is the first bad commit
> commit 31e77af205cf6564c2bf4c18400b4ca16bdf92cd
> Author: Pedro Alves <palves@redhat.com>
> Date:   Thu Mar 20 13:26:32 2014 +0000
>     PR breakpoints/7143 - Watchpoint does not trigger when first set
> 
> PASS kernel-3.14.6-200.fc20.x86_64
> FAIL kernel-3.13.10-200.dentrybuflen.fc20.x86_64
> 
> continue^M
> Continuing.^M
> main () at ./gdb.threads/watchpoint-fork-st.c:50^M
> 50        forkoff (1);^M
> Couldn't write debug register: Invalid argument.^M

Odd.

> (gdb) FAIL: gdb.threads/watchpoint-fork.exp: parent: singlethreaded: breakpoint after the first fork
> 
> Being tested for default linux-nat.
> 
> That 'dentrybuflen' patch should not matter.  I did not check which Linux
> kernels are / are not affected by the regression but it would be probably
> better to make the GDB behavior more Linux kernel compatible.

Yes, though off hand I'm clueless on what's going on.

-- 
Pedro Alves