RFR [8055338]: (process) Add instrumentation to help diagnose JDK-6573254

[David Holmes]

On 19/08/2014 10:12 AM, Ioi Lam wrote:
> With the Windows/x86/x64 memory model, is the write to
> vm_getting_terminated guaranteed to be observable by java_start()?

In the general case, not immediately. For the threads actually of 
interest the logic that tells the threads to terminate happens after the 
write to the flag, and that logic contains sufficient "synchronization" 
that if the termination logic is correct then the flag must also be visible.

David

> - Ioi
>
> On 8/18/14, 2:19 PM, Ivan Gerasimov wrote:
>> Hello!
>>
>> This is a request to temporarily add some instrumentation code to
>> hotspot to help diagnose the intermittent failure on Windows, which
>> results in a wrong exit code of (sub-)process.
>>
>> BUGURL: https://bugs.openjdk.java.net/browse/JDK-8055338
>> WEBREV: http://cr.openjdk.java.net/~igerasim/8055338/0/webrev/
>>
>> Sincerely yours,
>> Ivan
>>
>