[GR-44867] [GR-45798] Use a synchronous ThreadLocalAction for killing other threads

PullRequest: truffleruby/3795

Author: eregon

src/main/java/org/truffleruby/core/thread/ThreadManager.java

@@ -684,7 +684,7 @@ private void doKillOtherThreads() {
 
         context.getSafepointManager().pauseAllThreadsAndExecute(
                 DummyNode.INSTANCE,
-                new SafepointAction("kill other threads for shutdown", predicate, true, false) {
+                new SafepointAction("kill other threads for shutdown", predicate, true, true) {
                     @Override
                     public void run(RubyThread rubyThread, Node currentNode) {
                         rubyThread.status = ThreadStatus.ABORTING;