(XS) RFR: 8131045: Obsolete JNIDetachReleasesMonitors (original) (raw)

David Simms david.simms at oracle.com
Tue Oct 27 09:21:28 UTC 2015

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

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