Go + JVMTI = ❤

This tool provides binding between JVMTI and Golang. The idea is simple: instead of writing C or C++ code we could utilize higher-level language like Go to interact with JVMTI interface.

How it works

• Main class simulates long running JVM process that we want to hook into
• CGO is used to compile Go program to be shared library accepted by JVM.

Unfortunately, CGO does not support function pointers which are used heavily in JVM + JVM TI. To overcome this I use simple proxy which exposes functions that CGO calls in order to communicate with JVMTI protocol.

• Compiled shared library is attached to the JVM process during startup using -agentpath:agent-go.so=dummy-option parameter. Please refer to Makefile to get better understanding of what is happening.

This POC is intended to show just a few basic things:

• how to read arguments passed to the agent and how to call JVMTI method from Go. The mumbo-jumbo related to CGO types are left to the reader - good luck.
• how to build CGO program to be shared library available for JVM