Please, review the Jigsaw fix for the enhancement:
  https://bugs.openjdk.java.net/browse/JDK-8159145


The Hotspot webrev:
http://javaweb.sfbay.sun.com/java/svc/ss45998/webrevs/2016/hotspot/8159145-jigsaw-jvmti-pkg.1/

The Jdk webrev:
http://javaweb.sfbay.sun.com/java/svc/ss45998/webrevs/2016/hotspot/8159145-jigsaw-jvmti-pkg.jdk1/


Summary:

JVM TI agents that instrument code in named modules need the Module at class load time.

One way to do this is by introducing a new ClassFileLoadHook that takes an additional parameter but this approach is disruptive. The alternative option is a JVM TI function that maps a classloader + package name to a module. We were initially not confident with this approach so we introduced it as JVM function JVM_GetModuleByPackageName. Based on experience to date then this approach seems okay and so this function needs to be promoted to a JVMTI function.

  This fix is to introduce new JVMTI function GetModuleByPackageName.
  It includes new jtreg test with native JVMTI agent.

  A CCC is fast-tracked and getting an approval is in progress.

Testing:
   Run newly developed jtreg test.

Thanks,
Serguei

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