RFR 4947890 : Minimize JNI upcalls in system-properties initialization

[Andrew Luo]

I'm not a reviewer, but aren't names that begin with _ in the global namespace (_awt_headless_NDX for example) reserved for the C/C++ library?

Thanks,

Andrew

-----Original Message-----
From: core-libs-dev <core-libs-dev-bounces at openjdk.java.net> On Behalf Of Roger Riggs
Sent: Tuesday, November 13, 2018 8:00 AM
To: Core-Libs-Dev <core-libs-dev at openjdk.java.net>; hotspot-runtime-dev at openjdk.java.net
Subject: RFR 4947890 : Minimize JNI upcalls in system-properties initialization

Please review a re-implementation of the initialization of System properties moving some functions from native to Java.

The upcalls from native to java for each property are replaced by a mechanism to gather the platform, VM and command line properties and return them from a single JNI call.  The creation of the Properties instance and applying command line overrides is handled in Java instead of native.

The JVM_initProperties interface in Hotspot is replaced by JVM_getProperties.

Webrev:
   http://cr.openjdk.java.net/~rriggs/webrev-props-only-raw/

Issue:
   https://bugs.openjdk.java.net/browse/JDK-4947890

Thanks, Roger