Move FormatStackTrace to C++

src/builtins/builtins-error.cc

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/builtins/builtins.h"
 #include "src/builtins/builtins-utils.h"
 
-#include "src/bootstrapper.h"
 #include "src/messages.h"
 #include "src/property-descriptor.h"
 #include "src/string-builder.h"
 
 namespace v8 {
 namespace internal {
 
 // ES6 section 19.5.1.1 Error ( message )
 BUILTIN(ErrorConstructor) {
   HandleScope scope(isolate);
@@ skipping 37 matching lines @@
   desc.set_writable(true);
   desc.set_value(formatted_stack_trace);
   Maybe<bool> status = JSReceiver::DefineOwnProperty(
       isolate, object, isolate->factory()->stack_string(), &desc,
       Object::THROW_ON_ERROR);
   if (!status.IsJust()) return isolate->heap()->exception();
   CHECK(status.FromJust());
   return isolate->heap()->undefined_value();
 }
 
-namespace {
-
-MaybeHandle<String> GetStringPropertyOrDefault(Isolate* isolate,
-                                               Handle<JSReceiver> recv,
-                                               Handle<String> key,
-                                               Handle<String> default_str) {
-  Handle<Object> obj;
-  ASSIGN_RETURN_ON_EXCEPTION(isolate, obj, JSObject::GetProperty(recv, key),
-                             String);
-
-  Handle<String> str;
-  if (obj->IsUndefined(isolate)) {
-    str = default_str;
-  } else {
-    ASSIGN_RETURN_ON_EXCEPTION(isolate, str, Object::ToString(isolate, obj),
-                               String);
-  }
-
-  return str;
-}
-
-}  // namespace
-
 // ES6 section 19.5.3.4 Error.prototype.toString ( )
 BUILTIN(ErrorPrototypeToString) {
   HandleScope scope(isolate);
-
-  // 1. Let O be the this value.
-  // 2. If Type(O) is not Object, throw a TypeError exception.
-  CHECK_RECEIVER(JSReceiver, receiver, "Error.prototype.toString");
-
-  // 3. Let name be ? Get(O, "name").
-  // 4. If name is undefined, let name be "Error"; otherwise let name be
-  // ? ToString(name).
-  Handle<String> name_key = isolate->factory()->name_string();
-  Handle<String> name_default = isolate->factory()->Error_string();
-  Handle<String> name;
-  ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
-      isolate, name,
-      GetStringPropertyOrDefault(isolate, receiver, name_key, name_default));
-
-  // 5. Let msg be ? Get(O, "message").
-  // 6. If msg is undefined, let msg be the empty String; otherwise let msg be
-  // ? ToString(msg).
-  Handle<String> msg_key = isolate->factory()->message_string();
-  Handle<String> msg_default = isolate->factory()->empty_string();
-  Handle<String> msg;
-  ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
-      isolate, msg,
-      GetStringPropertyOrDefault(isolate, receiver, msg_key, msg_default));
-
-  // 7. If name is the empty String, return msg.
-  // 8. If msg is the empty String, return name.
-  if (name->length() == 0) return *msg;
-  if (msg->length() == 0) return *name;
-
-  // 9. Return the result of concatenating name, the code unit 0x003A (COLON),
-  // the code unit 0x0020 (SPACE), and msg.
-  IncrementalStringBuilder builder(isolate);
-  builder.AppendString(name);
-  builder.AppendCString(": ");
-  builder.AppendString(msg);
-  RETURN_RESULT_OR_FAILURE(isolate, builder.Finish());
+  RETURN_RESULT_OR_FAILURE(isolate, ErrorToString(isolate, args.receiver()));
 }
 
 }  // namespace internal
 }  // namespace v8