See https://mail.openjdk.java.net/pipermail/core-libs-dev/2019-July/061268.html

A few ideas of potential clean up:

1. ClassLoader::sys_paths is the library path for boot loader whereas ClassLoader::usr_paths is the library path for user-defined loaders

We should consider refactoring the native library loading implementation
such that ClassLoader::loadLibrary can delegate to BootLoader::loadLibrary
and the permission checks for user-defined loader is not needed for the boot loader. So BootLoader::loadLibrary can further be optimized.

2. This refactoring enables Panama LibraryLookup to load a native library without the limitation to restrict only lookups from the same class loader can access functions from a native library.

JDK-8236075 has addressed the potential race in initializing sys_paths and usr_paths.