Code Review request for bug fixes found by the Contended Locking project

[Daniel D. Daugherty]

Thanks Serguei!

Dan


On 1/17/13 2:21 PM, serguei.spitsyn at oracle.com wrote:
> Dan,
>
> The fixes look good.
>
>
> Thanks,
> Serguei
>
>
> On 1/17/13 10:45 AM, Daniel D. Daugherty wrote:
>> Greetings,
>>
>> I have been working on the Contended Locking project and there are some
>> bug fixes that I'd like to push into HSX-25 independently of the 
>> Contended
>> Locking project.
>>
>> I'm using three different bug IDs to track these very distinct bug
>> fixes:
>>
>>     6444286 Possible naked oop related to biased locking revocation
>>             safepoint in jni_exit()
>>     http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6444286
>>     https://jbs.oracle.com/bugs/browse/JDK-6444286
>>
>>     8004902 correctness fixes motivated by contended locking work 
>> (6607129)
>>     http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=8004902
>>     https://jbs.oracle.com/bugs/browse/JDK-8004902
>>
>>     8004903 VMThread::execute() calls 
>> Thread::check_for_valid_safepoint_state()
>>             on concurrent VM ops
>>     http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=8004903
>>     https://jbs.oracle.com/bugs/browse/JDK-8004903
>>
>> Here is the URL for the webrev:
>>
>> http://cr.openjdk.java.net/~dcubed/cl_bug_fix_bucket-webrev/2/
>>
>> These changes have been through two internal rounds of code review so I
>> think they are ready for wider review. The changes for 8004902 are very
>> tricky and there is long write-up attached to the 8004902 bug report 
>> that
>> explains the intricate details of the "triangular race". The changes for
>> 6444286 and 8004903 are more straight forward.
>>
>> These changes have been through JPRT build-and-test and have also been
>> tested with the vm.parallel_class_loading and vm.quick subsuites via
>> the Aurora ad-hoc testing mechanism.
>>
>> The current set of reviewers is:
>>
>>     acorn, dholmes, dice
>>
>> As always, other reviewers are welcome. Comments, questions and
>> suggestions are also welcome.
>>
>> Dan
>>
>