RFR(S) 8230677: Should disable Escape Analysis if JVMTI capability can_get_owned_monitor_info was taken

[Reingruber, Richard]

Hi,

could I please get reviews for

Webrev: http://cr.openjdk.java.net/~rrich/webrevs/2019/8230677/webrev.0/
Bug:    https://bugs.openjdk.java.net/browse/JDK-8230677

The JVMTI functions GetOwnedMonitorInfo() and GetOwnedMonitorStackDepthInfo() can be used to
retrieve objects locked by a thread. In terms of escape analysis those references escape and
optimizations like scalar replacement become invalid.

The runtime currently cannot cope with objects escaping through JVMTI (try included
tests). Therefore escape analysis should be disabled if an agent requests the capabilities
can_get_owned_monitor_info or can_get_owned_monitor_stack_depth_info.

This was taken out of JDK-8227745 [1] to make it smaller. With JDK-8227745 there's no need to
disable escape analysis, instead optimizations based on escape analysis will be reverted just before
objects escape through JVMTI.

I've run tier1 tests.

Thanks, Richard.

[1] https://bugs.openjdk.java.net/browse/JDK-8227745