llvm dev - Jan 2016 - Some ASan and TSan tests go into an infinite loop on Debian/sid x86_64

Hi,

I was just building the top-of-trunk of LLVM/Clang/compiler-rt on
Debian/sid x86_64 (with gcc (Debian 5.3.1-7) 5.3.1 20160121) and for
me Asan-x86_64-inline-Test/AddressSanitizer.ManyThreadsTest does not
finish running:

Note: Google Test filter = AddressSanitizer.ManyThreadsTest
[==========] Running 1 test from 1 test case.
[----------] Global test environment set-up.
[----------] 1 test from AddressSanitizer
[ RUN      ] AddressSanitizer.ManyThreadsTest
<just keeps going for minutes>

Same for 'ThreadSanitizer :: mmap_stress.cc', but it doesn't produce
any output.

The tests seem to be multithreaded, so I want to mention that this is
an 18-core VM.  Maybe the tests are not scaling well?

Is this a known issue?

Dmitri

-- 
main(i,j){for(i=2;;i++){for(j=2;j<i;j++){if(!(i%j)){j=0;break;}}if
(j){printf("%d\n",i);}}} /*Dmitri Gribenko <gribozavr at
gmail.com>*/

On 28-01-2016 05:20, Dmitri Gribenko via llvm-dev wrote:
> Hi,
> 
> I was just building the top-of-trunk of LLVM/Clang/compiler-rt on
> Debian/sid x86_64 (with gcc (Debian 5.3.1-7) 5.3.1 20160121) and for
> me Asan-x86_64-inline-Test/AddressSanitizer.ManyThreadsTest does not
> finish running:
> 
> Note: Google Test filter = AddressSanitizer.ManyThreadsTest
> [==========] Running 1 test from 1 test case.
> [----------] Global test environment set-up.
> [----------] 1 test from AddressSanitizer
> [ RUN      ] AddressSanitizer.ManyThreadsTest
> <just keeps going for minutes>
> 
> Same for 'ThreadSanitizer :: mmap_stress.cc', but it doesn't
produce any output.
> 
> The tests seem to be multithreaded, so I want to mention that this is
> an 18-core VM.  Maybe the tests are not scaling well?
> 
> Is this a known issue?
> 
> Dmitri
> 
We noted on AArch64 buildbot constantly [1] so we disabled it on aarch64 for
further investigation (I haven't check it yet). Failing on x86_64 makes me
believe this is not an architecture specific issue.

[1] https://llvm.org/bugs/show_bug.cgi?id=24389

Have you tried attaching gdb to the running test and collecting the stack trace?

On Thu, Jan 28, 2016 at 8:20 AM, Dmitri Gribenko via llvm-dev
<llvm-dev at lists.llvm.org> wrote:
> Hi,
>
> I was just building the top-of-trunk of LLVM/Clang/compiler-rt on
> Debian/sid x86_64 (with gcc (Debian 5.3.1-7) 5.3.1 20160121) and for
> me Asan-x86_64-inline-Test/AddressSanitizer.ManyThreadsTest does not
> finish running:
>
> Note: Google Test filter = AddressSanitizer.ManyThreadsTest
> [==========] Running 1 test from 1 test case.
> [----------] Global test environment set-up.
> [----------] 1 test from AddressSanitizer
> [ RUN      ] AddressSanitizer.ManyThreadsTest
> <just keeps going for minutes>
>
> Same for 'ThreadSanitizer :: mmap_stress.cc', but it doesn't
produce any output.
>
> The tests seem to be multithreaded, so I want to mention that this is
> an 18-core VM.  Maybe the tests are not scaling well?
>
> Is this a known issue?
>
> Dmitri
>
> --
> main(i,j){for(i=2;;i++){for(j=2;j<i;j++){if(!(i%j)){j=0;break;}}if
> (j){printf("%d\n",i);}}} /*Dmitri Gribenko <gribozavr at
gmail.com>*/
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev


-- 
Alexander Potapenko
Software Engineer

Google Germany GmbH
Erika-Mann-Straße, 33
80636 München

Geschäftsführer: Matthew Scott Sucherman, Paul Terence Manicle
Registergericht und -nummer: Hamburg, HRB 86891
Sitz der Gesellschaft: Hamburg
Diese E-Mail ist vertraulich. Wenn Sie nicht der richtige Adressat sind,
leiten Sie diese bitte nicht weiter, informieren Sie den
Absender und löschen Sie die E-Mail und alle Anhänge. Vielen Dank.
This e-mail is confidential. If you are not the right addressee please
do not forward it, please inform the sender, and please erase this
e-mail including any attachments. Thanks.