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Re: Getting spurious FAILS in testsuite?


On 8 June 2017 at 11:57, Georg-Johann Lay <avr@gjlay.de> wrote:
> On 05.06.2017 18:25, Jim Wilson wrote:
>>
>> On 06/01/2017 05:59 AM, Georg-Johann Lay wrote:
>>>
>>> Hi, when I am running the gcc testsuite in $builddir/gcc then
>>> $ make check-gcc RUNTESTFLAGS='ubsan.exp'
>>> comes up with spurious fails.
>>
>>
>> This was discussed before, and the suspicion was that it was a linux
>> kernel bug.  There were multiple kernel fixes pointed at, it wasn't
>> clear which one was required to fix it.
>>
>> I have Ubuntu 16.04 LTS on my laptop, and I see the problem.  I can't
>> run the ubsan testsuites with -j factor greater than one and get
>> reproducible results.  There may also be other ways to trigger the
>> problem.
>>
>> See for instance the thread
>>     https://gcc.gnu.org/ml/gcc/2016-07/msg00117.html
>> The first message in the thread from Andrew Pinski mentions that the log
>> output is corrupted from apparent buffer overflow.
>>
>> Jim
>
>
>
> I have "Ubuntu 16.04.2 LTS".
>
> Asking this at DejaGNU's, I got the following pointer:
>
> https://lists.gnu.org/archive/html/dejagnu/2016-03/msg00034.html
>
> AFAIU there is a problem separating stdout and stderr?
>

Be careful, I'm not a dejagnu maintainer/developer :-)
I just meant to say I had "similar" problems, but according to this
thread, I'm not the only one :(

> Johann
>
>
>


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