Integrated: 8227745: Enable Escape Analysis for Better Performance in the Presence of JVMTI Agents

[Richard Reingruber]

On Thu, 10 Sep 2020 20:48:23 GMT, Richard Reingruber <rrich at openjdk.org> wrote:

> Hi,
> 
> this is the continuation of the review of the implementation for:
> 
> https://bugs.openjdk.java.net/browse/JDK-8227745
> https://bugs.openjdk.java.net/browse/JDK-8233915
> 
> It allows for JIT optimizations based on escape analysis even if JVMTI agents acquire capabilities to access references
> to objects that are subject to such optimizations, e.g. scalar replacement. The implementation reverts such
> optimizations just before access very much as when switching from JIT compiled execution to the interpreter, aka
> "deoptimization".  Webrev.8 was the last one before before the transition to Git/Github:
> 
> http://cr.openjdk.java.net/~rrich/webrevs/8227745/webrev.8/
> 
> Thanks, Richard.

This pull request has now been integrated.

Changeset: 40f847e2
Author:    Richard Reingruber <rrich at openjdk.org>
URL:       https://git.openjdk.java.net/jdk/commit/40f847e2
Stats:     5860 lines in 53 files changed: 5642 ins; 116 del; 102 mod

8227745: Enable Escape Analysis for Better Performance in the Presence of JVMTI Agents
8233915: JVMTI FollowReferences: Java Heap Leak not found because of C2 Scalar Replacement

Reviewed-by: mdoerr, goetz, sspitsyn, kvn

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PR: https://git.openjdk.java.net/jdk/pull/119