On 08/22/2012 10:58 AM, Jan Stancek wrote:
>
>
> ----- Original Message -----
>> From: "Kang Kai" <[email protected]>
>> To: "Jan Stancek" <[email protected]>
>> Cc: [email protected], [email protected], "Zhenfeng
>> Zhao" <[email protected]>
>> Sent: Wednesday, 22 August, 2012 10:28:59 AM
>> Subject: Re: [LTP] [PATCH] pthread_detach/4-3: workaround for segment fault
>
>> Hi Jan,
>>
>>> Is the above output from mips or x86_64?
>>> Are you running it as root user?
>>
>> This was tested on x86_64 with unprivileged user. I retest it with
>> root
>> and test passes.
>
> Your unprivileged user is hitting some resource limit, I'd be interested
> to see how many threads are actually running at the same time.
>
>> It passes on routerstation(mips) with your patch too.
>> So it looks like a race condition issue about stack attribute between
>> threads, right?
>
> I think so. We can try different way of signalling when threaded() is done
> and try it again with all scenarios.
I think this testcase is broken in more than 1 way. At least on my setup, I
don't see
a single pthread_detach() while signals are firing - which is exactly goal of
this test.
With following change:
diff --git
a/testcases/open_posix_testsuite/conformance/interfaces/pthread_detach/4-3.c
b/testcases/open_posix_testsuite/conforman
index dfa6e19..48e1343 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
@@ -277,6 +276,7 @@ int main(int argc, char *argv[])
do_it1 = 0;
} while (do_it1);
+ output(" %d thread detached while signals were firing.\n", count_ope);
sleep(1);
do {
I get:
[16:11:23] 1 thread detached while signals are firing.
[16:11:24]Test executed successfully.
[16:11:24] 77865 thread detached.
and that reported "1" is how many threads attempted to call pthread_detach, not
how many actually
succeeded. Signals are firing so frequently that threaded() can't progress at
all.
Regards,
Jan
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