worker: use snapshot in workers spawned by workers

Previously we didn't pass the snapshot data down to the isolate
data of workers so workers spawned by workers won't use the
snapshot. Fixes it by passing the snapshot data down.

PR-URL: #47731
Reviewed-By: Yagiz Nizipli <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Benjamin Gruenbaum <[email protected]>
Reviewed-By: Chengzhong Wu <[email protected]>

Author: joyeecheung

src/node_worker.cc

@@ -179,10 +179,12 @@ class WorkerThreadData {
       isolate->SetStackLimit(w->stack_base_);
 
       HandleScope handle_scope(isolate);
-      isolate_data_.reset(CreateIsolateData(isolate,
-                                            &loop_,
-                                            w_->platform_,
-                                            allocator.get()));
+      isolate_data_.reset(
+          CreateIsolateData(isolate,
+                            &loop_,
+                            w_->platform_,
+                            allocator.get(),
+                            w->snapshot_data()->AsEmbedderWrapper().get()));
       CHECK(isolate_data_);
       if (w_->per_isolate_opts_)
         isolate_data_->set_options(std::move(w_->per_isolate_opts_));
@@ -315,6 +317,10 @@ void Worker::Run() {
         // though.
         TryCatch try_catch(isolate_);
         if (snapshot_data_ != nullptr) {
+          Debug(this,
+                "Worker %llu uses context from snapshot %d\n",
+                thread_id_.id,
+                static_cast<int>(SnapshotData::kNodeBaseContextIndex));
           context = Context::FromSnapshot(isolate_,
                                           SnapshotData::kNodeBaseContextIndex)
                         .ToLocalChecked();
@@ -323,6 +329,8 @@ void Worker::Run() {
             context = Local<Context>();
           }
         } else {
+          Debug(
+              this, "Worker %llu builds context from scratch\n", thread_id_.id);
           context = NewContext(isolate_);
         }
         if (context.IsEmpty()) {