The orginal version of the jvmti_wrapper and jvmti_sys is not available from github.com(link). So I cannot fork the repository to improve the functionality. But the code is available from docs.rs. The first commit is copied code from jvmti_wrapper and jvmti_sys.
I modified the code, fit Rust 2021.
Welcome, if you found something is wrong, please report it to the issue tracker.
Thank You!