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

[Joseph Provino]

Looks good to me.

joe

On 3/16/2015 12:17 PM, 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