RFR (S) 8178870: instrumentation.retransformClasses cause coredump

[Jiangli Zhou]

Hi Coleen,

Not an expert in JVMTI area. The bug analysis, fix and test look good to me!

Thanks,
Jiangli

> On Oct 5, 2017, at 11:15 AM, coleen.phillimore at oracle.com wrote:
> 
> Summary: Don't double-free cached class bytes on redefinition loading failure.
> 
> See bug for more description.  Tested with test/jdk/java/lang/instrument, test/hotspot/jtreg/runtime/RedefineTests, internal CDS tests, internal nsk.jvmti tests, and added test.
> 
> open webrev at http://cr.openjdk.java.net/~coleenp/8178870.01/webrev
> bug link https://bugs.openjdk.java.net/browse/JDK-8178870
> 
> Thanks,
> Coleen