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

[Jon Masamitsu]

Joe,

Changes look good.

Reviewed.

Jon


On 4/14/2015 10:14 AM, Joseph Provino wrote:
> 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.
>>
>>
>