worker: runtime error on pthread creation

With large number of worker threads pthread
fails with hard assertion.
Instead of hard assertion throw a runtime error.

PR-URL: #32344
Fixes: #32319
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>

src/node_errors.h

@@ -58,6 +58,7 @@ void OnFatalError(const char* location, const char* message);
   V(ERR_TRANSFERRING_EXTERNALIZED_SHAREDARRAYBUFFER, TypeError)                \
   V(ERR_TLS_PSK_SET_IDENTIY_HINT_FAILED, Error)                                \
   V(ERR_VM_MODULE_CACHED_DATA_REJECTED, Error)                                 \
+  V(ERR_WORKER_INIT_FAILED, Error)                                             \
   V(ERR_PROTO_ACCESS, Error)
 
 #define V(code, type)                                                         \
@@ -107,6 +108,7 @@ void OnFatalError(const char* location, const char* message);
   V(ERR_TRANSFERRING_EXTERNALIZED_SHAREDARRAYBUFFER,                           \
     "Cannot serialize externalized SharedArrayBuffer")                         \
   V(ERR_TLS_PSK_SET_IDENTIY_HINT_FAILED, "Failed to set PSK identity hint")    \
+  V(ERR_WORKER_INIT_FAILED, "Worker initialization failure")                   \
   V(ERR_PROTO_ACCESS,                                                          \
     "Accessing Object.prototype.__proto__ has been "                           \
     "disallowed with --disable-proto=throw")

src/node_worker.cc

@@ -625,7 +625,7 @@ void Worker::StartThread(const FunctionCallbackInfo<Value>& args) {
   uv_thread_options_t thread_options;
   thread_options.flags = UV_THREAD_HAS_STACK_SIZE;
   thread_options.stack_size = kStackSize;
-  CHECK_EQ(uv_thread_create_ex(&w->tid_, &thread_options, [](void* arg) {
+  int ret = uv_thread_create_ex(&w->tid_, &thread_options, [](void* arg) {
     // XXX: This could become a std::unique_ptr, but that makes at least
     // gcc 6.3 detect undefined behaviour when there shouldn't be any.
     // gcc 7+ handles this well.
@@ -646,7 +646,23 @@ void Worker::StartThread(const FunctionCallbackInfo<Value>& args) {
           w->JoinThread();
           // implicitly delete w
         });
-  }, static_cast<void*>(w)), 0);
+  }, static_cast<void*>(w));
+  if (ret != 0) {
+    char err_buf[128];
+    uv_err_name_r(ret, err_buf, sizeof(err_buf));
+    w->custom_error_ = "ERR_WORKER_INIT_FAILED";
+    w->custom_error_str_ = err_buf;
+    w->loop_init_failed_ = true;
+    w->thread_joined_ = true;
+    w->stopped_ = true;
+    w->env()->remove_sub_worker_context(w);
+    {
+      Isolate* isolate = w->env()->isolate();
+      HandleScope handle_scope(isolate);
+      THROW_ERR_WORKER_INIT_FAILED(isolate, err_buf);
+    }
+    w->MakeWeak();
+  }
 }
 
 void Worker::StopThread(const FunctionCallbackInfo<Value>& args) {