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

Dmitry Fazunenko dmitry.fazunenko at oracle.com
Thu Nov 26 10:02:53 UTC 2015


Thank you, Bengt!

-- Dima

On 26.11.2015 10:17, Bengt Rutisson wrote:
>
> Hi Dima,
>
> On 2015-11-16 18:46, Dmitry Fazunenko wrote:
>> Hello,
>>
>> may I have a couple of reviews for a fix made Andrey Zakharov, please:
>>
>> https://bugs.openjdk.java.net/browse/JDK-8016752
>> http://cr.openjdk.java.net/~dfazunen/8016752/webrev.00/
>
> Looks ok.
>
> Thanks,
> Bengt
>
>>
>> Comments: during the fix TEST.ROOT is modified: java.version is 
>> registered as a property that can be used in the @requires tag.
>> It allows to declare a test as fastdebug specific:
>>
>> @requires java.version ~= ".*fastdebug"
>>
>> Thanks,
>> Dima
>>
>>
>>
>>
>>
>> -------- Forwarded Message --------
>> Subject: 	Re: [RFR] 8016752: Test case for 8005857/8016740 (assert in 
>> GC_locker from PSOldGen::expand with -XX:+PrintGCDetails and Verbose)
>> Date: 	Mon, 01 Jun 2015 14:28:14 +0300
>> From: 	Andrey Zakharov <andrey.x.zakharov at oracle.com>
>> To: 	Dmitry Fazunenko <dmitry.fazunenko at oracle.com>
>> CC: 	Thomas Schatzl <thomas.schatzl at oracle.com>, 
>> hotspot-gc-dev at openjdk.java.net
>>
>>
>>
>> It was resubmitted in February
>> http://mail.openjdk.java.net/pipermail/hotspot-gc-dev/2015-February/012028.html
>>
>> I'll update patch and re-upload it.
>> Thanks.
>>
>> On 27.05.2015 18:13, Dmitry Fazunenko wrote:
>> > Hi Andrey,
>> >
>> > jtreg does already support "~=" in @requires, could you resubmit the
>> > change please.
>> >
>> > Thanks,
>> > Dima
>> >
>> > On 12.11.2014 15:45, Dmitry Fazunenko wrote:
>> >> Hi Andrey,
>> >>
>> >> I think it's too early to rely on '~=' in @requires.  There is no
>> >> guarantee that it will be supported. (I hope it will).
>> >>
>> >> You also need to add @requires and list GC the test will work with.
>> >>
>> >> Thanks,
>> >> Dima
>> >>
>> >>
>> >> On 12.11.2014 14:59, Andrey Zakharov wrote:
>> >>> Hi, team
>> >>> As this test requires fastdebug build, here is update according to
>> >>> latest changes to jtreg (@requires tag).
>> >>> Also I've suggested patch to jtreg for support matching against
>> >>> regexp patterns in @requires expressions (like "foo bar" ~= ".*bar")
>> >>> *(its blocker for original tesbug now)
>> >>>
>> >>> webrev:
>> >>>http://cr.openjdk.java.net/~azakharov/8016752/webrev.02/
>> >>>
>> >>> testbug:
>> >>>https://bugs.openjdk.java.net/browse/JDK-8016752
>> >>>
>> >>> Thanks.
>> >>>
>> >>> On 10.11.2014 14:36, Andrey Zakharov wrote:
>> >>>> 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
>> >>>>>
>> >>>>>
>> >>>>
>> >>>
>> >>
>> >
>>
>>
>>
>

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