JDK-8135081 : Better C1 handling for VarHandles.(get|set)Opaque
  • Type: Sub-task
  • Component: core-libs
  • Sub-Component: java.lang.invoke
  • Priority: P4
  • Status: Closed
  • Resolution: Fixed
  • Submitted: 2015-09-04
  • Updated: 2015-09-15
  • Resolved: 2015-09-15
The Version table provides details related to the release that this issue/RFE will be addressed.

Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.

To download the current JDK release, click here.
JDK 9
9Fixed
Related Reports
Relates :  
JDK-8134293 - VH.(get|set)Opaque implementations
Description
After JDK-8134293, C1 does (get|set)Opaque by delegating to unsafe.cpp calls.
We can do better: say, a non-inlineable Java method, or a runtime stub that avoids JNI.
Comments
We should nominally delegate to volatile handlers, as unsafe.cpp does. This improves the performance significantly already. Pushed: http://hg.openjdk.java.net/jdk9/sandbox/hotspot/rev/65b109952173
15-09-2015