Revert "async_hooks: only set up hooks if used"

This reverts commit 410b141.

PR-URL: #13509
Reviewed-By: Andreas Madsen <amwebdk@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>

lib/async_hooks.js

@@ -49,7 +49,12 @@ const before_symbol = Symbol('before');
 const after_symbol = Symbol('after');
 const destroy_symbol = Symbol('destroy');
 
-let setupHooksCalled = false;
+// Setup the callbacks that node::AsyncWrap will call when there are hooks to
+// process. They use the same functions as the JS embedder API.
+async_wrap.setupHooks({ init,
+ before: emitBeforeN,
+ after: emitAfterN,
+ destroy: emitDestroyN });
 
 // Used to fatally abort the process if a callback throws.
 function fatalError(e) {
@@ -98,16 +103,6 @@ class AsyncHook {
  if (hooks_array.includes(this))
  return this;
 
- if (!setupHooksCalled) {
- setupHooksCalled = true;
- // Setup the callbacks that node::AsyncWrap will call when there are
- // hooks to process. They use the same functions as the JS embedder API.
- async_wrap.setupHooks({ init,
- before: emitBeforeN,
- after: emitAfterN,
- destroy: emitDestroyN });
- }
-
  // createHook() has already enforced that the callbacks are all functions,
  // so here simply increment the count of whether each callbacks exists or
  // not.