[PATCH] Test case for BZ 19329

[Joseph Myers]

On Thu, 24 Nov 2016, Szabolcs Nagy wrote:

> Test concurrent dlopen and pthread_create when the loaded
> modules have TLS.  This triggers dl-tls assertion failures
> more reliably than the tst-stack4 test.
> 
> The dlopened module has 100 DT_NEEDED dependencies and
> for me about 4000 concurrent thread creations are needed
> to see failures on x86_64.

I'd be concerned about 4000 threads exceeding task or memory limits, 
possibly interfering with other things the same user is doing that also 
try to create tasks.

(I rountinely see tst-eintr1 failing with "pthread_create failed: Resource 
temporarily unavailable", sometimes terminating the test run because make 
fails to fork to run evaluate-test.sh, apparently not all threads having 
properly terminated by the time the test does.  I don't know how many 
threads that is creating.)

-- 
Joseph S. Myers
joseph@codesourcery.com