RFR(S): 8061443: Whitebox get*VMFlag() methods fail with develop flags in product builds

[Tobias Hartmann]

Hi,

please review the following patch.

Bug: https://bugs.openjdk.java.net/browse/JDK-8061443
Webrev: http://cr.openjdk.java.net/~thartmann/8061443/webrev.00/

Problem:
The Whitebox API methods get*VMFlag() fail with develop/notproduct flags in
product builds.

Solution:
The code is changed to invoke 'Flag::find_flag' with allow_locked=true and
return_flag=true to return both locked and notproduct/develop flags. I also
changed the JVM monitoring and management code 'jmm_GetVMGlobals()'.

I adapted the existing tests to check for develop flags as well. I noticed that
HotspotDiagnosticMXBean.getVMOption() fails with double flags and filed
JDK-8061616 [1].

Testing:
- New testcases
- JPRT

Thanks,
Tobias


[1] https://bugs.openjdk.java.net/browse/JDK-8061616