Get rid of WeakReference-based logic in DirectMethodHandle::checkInitialized() and reimplement it with `Unsafe::ensureClassInitialized()`/`shouldBeInitialized()`.
The key observation is that `Unsafe::ensureClassInitialized()` does not block the initializing thread. Also, removed `Unsafe::shouldBeInitialized()` in `DMH::shouldBeInitialized(MemberName)` to save on calling into the VM. `Unsafe::ensureClassInitialized()` already has a fast-path check which checks whether the class is fully initialized or not. Testing: tier1 - tier6 ------------- Commit messages: - Remove WeakReference-based logic Changes: https://git.openjdk.java.net/jdk/pull/5258/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5258&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8273000 Stats: 35 lines in 1 file changed: 0 ins; 32 del; 3 mod Patch: https://git.openjdk.java.net/jdk/pull/5258.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/5258/head:pull/5258 PR: https://git.openjdk.java.net/jdk/pull/5258
