(XS) RFR: 8131045: Obsolete JNIDetachReleasesMonitors

[David Simms]

Looks good !

/David Simms

On 27/10/15 06:11, David Holmes wrote:
> bug: https://bugs.openjdk.java.net/browse/JDK-8131045
>
> webrev: http://cr.openjdk.java.net/~dholmes/8131045/webrev/
>
> The JNIDetachReleasesMonitors flag was added to JDK 6 when it was 
> realized that the VM was not compliant with the JNI specification 
> regarding the release of monitors when a JNI attached thread detached 
> - see JDK-6336479. The flag allowed for restoration of the incorrect 
> behaviour if an application was somehow relying on it.
>
> By now all applications should themselves be JNI-spec compliant and 
> this workaround should not be needed, so we can obsolete the 
> JNIDetachReleasesMonitors flag in JDK 9 (accept it, report it, but 
> take no action) and expire (remove) it in JDK 10.
>
> > ./b00/linux-i586-internal/images/jdk/bin/java 
> -XX:-JNIDetachReleasesMonitors -version
> Java HotSpot(TM) Server VM warning: Ignoring option 
> JNIDetachReleasesMonitors; support was removed in 9.0
>
> Testing: JPRT
>
> I haven't yet found any tests that involve this flag but there's bound 
> to be at least one hiding somewhere. :)
>
> A CCC request has been filed.
>
> Thanks,
> David