RFR (S) 8024517: runtime/CDSCompressedKPtrs/XShareAuto.java failed with RuntimeException

[harold seigel]

Hi,

Please review this small fix for bug 8024517.  This test failed when run 
on a small system because CDS was not disabled by default. Although the 
test was run with '-server', CDS was not disabled because function 
os::is_server_class_machine() returned FALSE.  This fix disables CDS by 
default if either os::is_server_class_machine() returns TRUE or the 
server compiler is running.

Also, the '-server' option was added to the test's '-Xshare:dump' 
command to ensure that the CDS region gets created by the same JVM that 
tries to read it.

The change was tested with the XShareAuto.java test, by hand using the 
NeverActAsServerClassMachine and AlwaysActAsServerClassMachine options, 
the UTE vm quicktests, and JPRT.

Open webrev at: http://cr.openjdk.java.net/~hseigel/bug_8024517/
<http://cr.openjdk.java.net/%7Ehseigel/bug_8024517/>
Bug: https://bugs.openjdk.java.net/browse/JDK-8024517

Thanks! Harold