RFR(S) 8239449: [TESTBUG] test/hotspot/jtreg/runtime/TLS/TestTLS.java: skip test if glibc too old for AdjustStackSizeForTLS

[David Holmes]

Hi Richard,

On 19/02/2020 8:44 pm, Reingruber, Richard wrote:
> Hi,
> 
> please review this small test fix
> 
> Webrev: http://cr.openjdk.java.net/~rrich/webrevs/8239449/webrev.0/
> Bug:    https://bugs.openjdk.java.net/browse/JDK-8239449
> 
> On linux systems with older glibc versions (e.g. 2.11) the option -XX:+AdjustStackSizeForTLS has no effect, because the private function __pthread_get_minstack is not provided, and the test fails. With the fix the test is skipped instead.

How old is glibc 2.11?

Is it not simpler for the test to try to dlsym the function itself to 
see if it exists?

Thanks,
David

> Thanks, Richard.
>