src,test: add regression test for nested Worker termination

This adds a regression test for terminating a Worker inside which another Worker is running. PR-URL: #32623 Refs: #32531 Reviewed-By: James M Snell <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Gireesh Punathil <[email protected]>

Author: addaleax

src/env.cc

@@ -1038,6 +1038,8 @@ void Environment::Exit(int exit_code){
 }
 
 voidEnvironment::stop_sub_worker_contexts(){
+DCHECK_EQ(Isolate::GetCurrent(), isolate());
+
 while (!sub_worker_contexts_.empty()){
  Worker* w = *sub_worker_contexts_.begin();
 remove_sub_worker_context(w);

test/parallel/test-worker-terminate-nested.js

@@ -0,0 +1,15 @@
+'use strict';
+constcommon=require('../common');
+const{ Worker }=require('worker_threads');
+
+// Check that a Worker that's running another Worker can be terminated.
+
+constworker=newWorker(`
+const{Worker, parentPort } = require('worker_threads');
+const worker = new Worker('setInterval(() =>{}, 10);',{eval: true });
+worker.on('online', () =>{
+ parentPort.postMessage({});
+});
+`,{eval: true});
+
+worker.on('message',common.mustCall(()=>worker.terminate()));