[RFR] 8016752: Test case for 8005857/8016740 (assert in GC_locker from PSOldGen::expand with -XX:+PrintGCDetails and Verbose)

[Andrey Zakharov]

Hi, Thomas
Yes, its fails very stable on 7u40b31
#  Internal Error 
(/HUDSON/workspace/jdk7u40-2-build-linux-amd64-product/jdk7u40/hotspot/src/share/vm/memory/gcLocker.hpp:94), 
pid=15099, tid=139928946063104
#  assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: 
only read at safepoint

with elapsed time (seconds): 1.273
on local linux x64 box.
And passed on b32.

Also, there are batches in comments of bugs for builds before fix and 
with fix.


On 04.11.2014 13:55, Thomas Schatzl wrote:
> Hi Andrey,
>
> On Wed, 2014-10-22 at 12:29 +0400, Andrey Zakharov wrote:
>> Hi, team.
>> Here is simple test for JVM don't crash when its with PSOldGen, low
>> memory and with -XX:+PrintGCDetails and -XX:+Verbose flags
>> (https://bugs.openjdk.java.net/browse/JDK-8016740) based on Crasher
>> attached to original incident bug
>>
>> webrev:
>> http://cr.openjdk.java.net/~azakharov/8016752/webrev/
> The test looks okay, but did you check that if you revert JDK-8016740,
> the test actually fails?
> The original reproducer was stressing the GC a lot more as it tried to
> cause crashes for 60 seconds.
>
> If that is the case, it looks okay to me.
>
> Thanks,
>    Thomas
>
>