RFR (XXS): 7006810: G1: Introduce peace-of-mind checking in the Suspendible Thread Set

[Joseph Provino]

I made those changes:

http://cr.openjdk.java.net/~jprovino/7006810/webrev.04/

joe

On 4/14/2015 12:39 PM, Kim Barrett wrote:
> On Apr 10, 2015, at 11:04 AM, Joseph Provino <joseph.provino at oracle.com> wrote:
>> Per, your analysis seems to be right on the money.
>>
>> After initializing the variable and putting in asserts in join/leave
>> and removing the asserts (which did indeed get hit) in synchronize/desynchronize
>> it passes jprt.
>>
>> Here's the latest webrev for review:
>>
>> http://cr.openjdk.java.net/~jprovino/7006810/webrev.03
> A couple of minor nits in src/share/vm/gc_implementation/shared/suspendibleThreadSet.cpp
>
>    36   assert(Thread::current()->is_suspendible_thread() == false,
>    37     "Thread already joined”);
>
> I’d prefer !Thread::current()->is_suspendible_thread() rather than comparison to false.
>
>    43 #ifdef ASSERT
>    44   Thread::current()->set_suspendible_thread();
>    45 #endif
>   
> Hotspot Stye guidelines suggest preferring DEBUG_ONLY forms to #ifdef ASSERT for short single-line conditionalization.  Similarly for the call to clear_suspendible_thread() a few lines later.
>
>