RFR: 8072128: Fixed missing "++" in _mutex_array[] initialization.

[David Holmes]

Reviewed!

Thanks Max!

David

On 17/03/2015 2:17 AM, Max Ockner wrote:
> Hello,
> Please review this small fix.
>
> Bug ID: 8072128
> Webrev: http://cr.openjdk.java.net/~mockner/8072128/
> Summary:  The fix for bug 8047290 introduced a bug in mutexLocker.cpp in
> which the index into _mutex_array[] never increments. The bug did not
> cause any test failures, and was caught upon inspection of an hs_err
> file which claimed that no locks were owned.  The solution was to
> restore the original code which increments the index.
>
> Tests: jtreg runtime/Safepoint and runtime/RedefineTests.
> To make sure the desired functionality was restored, the change was
> manually tested by crashing the vm during VM_RedefineClasses::doit()
> when we know that some locks are owned, and inspecting the hs_err file.
> This is difficult to write a test for, so it was only done manually.
>
> Thanks,
> Max