Input from Alan:

Most of the support for module aware agents went into JDK 9 as part of the module system in jdk-9+111. JDK-8153749 is in progress to add an additional capability that will allow agents get the CFLH in the primordial phase.

Remaining issues that need examination are:

1. There is currently isn't a way for agents to get the Module in a ClassFileLoadHook event for a class load (for a retransform then class_being_redefined is non-NULL and so the agent can use JNI GetModule).

2. Should the new transform method in ClassFileTransformer provide the ClassLoader in addition to the Module?