On 2012年08月21日 17:45, Jan Stancek wrote:
> On 08/21/2012 11:24 AM, Kang Kai wrote:
>> On 2012年08月21日 09:35, Wanlong Gao wrote:
>>> On 08/21/2012 09:31 AM, Kang Kai wrote:
>>>> On 2012年08月20日 10:21, Kang Kai wrote:
>>>>> On 2012年08月20日 10:01, Wanlong Gao wrote:
>>>>>> On 08/20/2012 09:39 AM, Kang Kai wrote:
>>>>>>> On 2012年08月19日 06:58, Wanlong Gao wrote:
>>>>>>>> On 08/14/2012 05:00 PM, Kang Kai wrote:
>>>>>>>>> This case fails randomly with "Segmentation fault". Reset VERBOSE to 6
>>>>>>>>> can avoid this problem.
>>>>>>>> Can you explain that why "reset VERBOSE" can avoid this "Seg Fault"
>>>>>>>> problem?
>>>>>>> It is a multi-thread issue. You can run it for less than 10 times, and
>>>>>>> it will fail with "Segmentation fault".
>>>>>> I didn't see this on my side.
>>>> Hi Wanlong,
>>>>
>>>>> It fails both on mips and x86_64.
>>>>> On the x86_64,
>>>>> cpu: Intel I7
>>>>> OS: Ubuntu 11.10
>>>>> libc: eglibc 2.13
>>>>> kernel: 3.0.0-12-generic
>>>>>
>>>>> How about try this script on a x86_64 machine:
>>>>> for i in $(seq 100); do echo $i; ./4-3.run-test ; ret=$?; if [ $ret -ne
>>>>> 0 ]; then echo $? ; break; fi; done
>>>> Do you meet the "Segmentation Fault" yet?
>> Hi Wanlong,
>>> Not yet.
>> I test it on x86_64 with Redhat 5.3, it doesn't fail.
> I tried to reproduce it on x86_64 RHEL6/7 (real hw+kvm) and
> ubuntu-12.04-server (kvm),
> but without any luck.
>
> I spotted one possible issue:
>
> diff --git
> a/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/4-3.c
> b/testcases/open_posix_testsuite/conforman
> index 5c15e93..7b738e7 100644
> ---
> a/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/4-3.c
> +++
> b/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/4-3.c
> @@ -129,9 +129,13 @@ static void *threaded(void *arg)
> UNRESOLVED(ret, "Unable to unblock SIGUSR1 and SIGUSR2"
> " in worker thread");
>
> - ret = pthread_detach(pthread_self());
> - if (ret == EINTR)
> - FAILED("pthread_detach() returned EINTR");
> + /* Attempting to detach an already detached thread results
> + * in unspecified behavior */
> + if (scenarii[sc].detached != 1) {
> + ret = pthread_detach(pthread_self());
> + if (ret == EINTR)
> + FAILED("pthread_detach() returned EINTR");
> + }
>
Hi Jan,
Thanks.
I am sorry that It doesn't work and still "segment fault".
Regards,
Kai
> /* Signal we're done */
> do {
>
> Regards,
> Jan
>
>> I try to compare them to find why it fails with Ubuntu 11.10.
>>
>> Thanks,
>> Kai
>>
>>> Thanks,
>>> Wanlong Gao
>>>
>>>> Regards,
>>>> Kai
>>>>
>>>>>>> It is hard to debug and I didn't find the root cause, but open the
>>>>>>> VERBOSE will avoid this situation. So it is a workaround.
>>>>>> I'd like to send a patch to fix this typo first.
>>>>> Fine.
>>>>>
>>>>> Regards,
>>>>> Kai
>>>>>
>>>>>> Thanks,
>>>>>> Wanlong Gao
>>>>>>
>>>>>>> Regards,
>>>>>>> Kai
>>>>>>>
>>>>>>>>> Fix typo at same time.
>>>>>>>> The typo fix is OK.
>>>>>>>>
>>>>>>>> Thanks,
>>>>>>>> Wanlong Gao
>>>>>>>>
>>>>>>>>> Signed-off-by: Kang Kai<kai.k...@windriver.com>
>>>>>>>>> ---
>>>>>>>>> .../conformance/interfaces/pthread_detach/4-3.c | 4 ++--
>>>>>>>>> 1 files changed, 2 insertions(+), 2 deletions(-)
>>>>>>>>>
>>>>>>>>> diff --git
>>>>>>>>> a/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/4-3.c
>>>>>>>>>
>>>>>>>>> b/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/4-3.c
>>>>>>>>> index 5c15e93..23738dc 100644
>>>>>>>>> ---
>>>>>>>>> a/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/4-3.c
>>>>>>>>> +++
>>>>>>>>> b/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/4-3.c
>>>>>>>>> @@ -49,7 +49,7 @@
>>>>>>>>> #include "../testfrmw/testfrmw.c"
>>>>>>>>>
>>>>>>>>> #ifndef VERBOSE
>>>>>>>>> -#define VERBOSE 1
>>>>>>>>> +#define VERBOSE 6
>>>>>>>>> #endif
>>>>>>>>>
>>>>>>>>> #define WITH_SYNCHRO
>>>>>>>>> @@ -281,7 +281,7 @@ int main(int argc, char *argv[])
>>>>>>>>>
>>>>>>>>> do {
>>>>>>>>> do_it2 = 0;
>>>>>>>>> - } while (do_it2 = 0);
>>>>>>>>> + } while (do_it2);
>>>>>>>>>
>>>>>>>>> ret = pthread_join(th_sig1, NULL);
>>>>>>>>> if (ret)
>>>>>>>>>
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