[graalvm-dev] A PR to support dynamic class loading and class serialization/deserialization in SubstrateVM

[林子熠(层风)]

Dear all,

We have committed a PR to support dynamic class loading and class
serialization/deserialization in SubstrateVM.

https://urldefense.com/v3/__https://github.com/oracle/graal/pull/2323__;!!GqivPVa7Brio!I9JJfIe3JyijYwHeZxP1gfgmWYa6h2H6FoD6rGzqiOGK40VXyMOYIMfamEmtMVLLXT6n9A$ 

The basic idea for supporting dynamic class loading is dumping classes
generated at run time in a beforehand run with native-image-agent to a
specified directory which is added to the classpath to build native-image.
Serialization/deserialization is basically dynamic class loading +
reflection.
This is implemented in 3 steps:

1.	Intercept java.lang.ClassLoader.postDefineClass and
sun.reflect.ClassDefiner.defineClass by native-image-agent to dump the
dynamically generated class to file system.
2.	Make sure the generated classes' names are fixed through Hotspot
version runtime and native-image version runtime.
3.	Substitute relevant classes in SubstrateVM to load the previously
dumped classes.

More details can be found the PR.

 

Ziyi Lin

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