Move Error methods to C++

src/bootstrapper.cc

 // Copyright 2014 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/bootstrapper.h"
 
 #include "src/accessors.h"
 #include "src/api-natives.h"
 #include "src/base/ieee754.h"
 #include "src/code-stubs.h"
@@ skipping 1098 matching lines @@
 
 static void InstallWithIntrinsicDefaultProto(Isolate* isolate,
                                              Handle<JSFunction> function,
                                              int context_index) {
   Handle<Smi> index(Smi::FromInt(context_index), isolate);
   JSObject::AddProperty(
       function, isolate->factory()->native_context_index_symbol(), index, NONE);
   isolate->native_context()->set(context_index, *function);
 }
 
+static void InstallError(Isolate* isolate, Handle<JSObject> global,
+                         Handle<String> name, int context_index) {
+  Factory* factory = isolate->factory();
+
+  Handle<JSFunction> error_fun =
+      InstallFunction(global, name, JS_ERROR_TYPE, JSObject::kHeaderSize,
+                      isolate->initial_object_prototype(),
+                      Builtins::kErrorConstructor, DONT_ENUM);
+  error_fun->shared()->set_instance_class_name(*factory->Error_string());
+  error_fun->shared()->DontAdaptArguments();
+  error_fun->shared()->set_construct_stub(
+      *isolate->builtins()->ErrorConstructor());
+  error_fun->shared()->set_length(1);
+  error_fun->shared()->set_native(true);
+
+  if (context_index == Context::ERROR_FUNCTION_INDEX) {
+    Handle<JSFunction> capture_stack_trace_fun =
+        SimpleInstallFunction(error_fun, "captureStackTrace",
+                              Builtins::kErrorCaptureStackTrace, 2, false);
+    capture_stack_trace_fun->shared()->set_native(true);
+  }
+
+  InstallWithIntrinsicDefaultProto(isolate, error_fun, context_index);
+
+  {
+    Handle<JSObject> prototype =
+        factory->NewJSObject(isolate->object_function(), TENURED);
+
+    JSObject::AddProperty(prototype, factory->name_string(), name, DONT_ENUM);
+    JSObject::AddProperty(prototype, factory->message_string(),
+                          factory->empty_string(), DONT_ENUM);
+    JSObject::AddProperty(prototype, factory->constructor_string(), error_fun,
+                          DONT_ENUM);
+
+    Handle<JSFunction> to_string_fun =
+        SimpleInstallFunction(prototype, factory->toString_string(),
+                              Builtins::kErrorPrototypeToString, 0, true);
+    to_string_fun->shared()->set_native(true);
+
+    if (context_index != Context::ERROR_FUNCTION_INDEX) {
+      Handle<JSFunction> globalError = isolate->error_function();

[Yang, 2016/07/15 13:10:11]

let's name this "global_error" to be consistent with the rest.

[jgruber, 2016/07/18 13:06:11]

Done.

+      CHECK(JSReceiver::SetPrototype(error_fun, globalError, false,
+                                     Object::THROW_ON_ERROR)
+                .FromMaybe(false));
+      CHECK(JSReceiver::SetPrototype(prototype,
+                                     handle(globalError->prototype(), isolate),
+                                     false, Object::THROW_ON_ERROR)
+                .FromMaybe(false));
+    }
+
+    Accessors::FunctionSetPrototype(error_fun, prototype).Assert();
+  }
+
+  Handle<Map> initial_map(error_fun->initial_map());
+  Map::EnsureDescriptorSlack(initial_map, 1);
+
+  PropertyAttributes attribs = DONT_ENUM;
+  Handle<AccessorInfo> error_stack =
+      Accessors::ErrorStackInfo(isolate, attribs);
+  {
+    AccessorConstantDescriptor d(Handle<Name>(Name::cast(error_stack->name())),
+                                 error_stack, attribs);
+    initial_map->AppendDescriptor(&d);
+  }
+}
 
 // This is only called if we are not using snapshots.  The equivalent
 // work in the snapshot case is done in HookUpGlobalObject.
 void Genesis::InitializeGlobal(Handle<JSGlobalObject> global_object,
                                Handle<JSFunction> empty_function,
                                GlobalContextType context_type) {
   // --- N a t i v e   C o n t e x t ---
   // Use the empty function as closure (no scope info).
   native_context()->set_closure(*empty_function);
   native_context()->set_previous(NULL);
@@ skipping 523 matching lines @@
     initial_map->AppendDescriptor(&field);
 
     static const int num_fields = JSRegExp::kInObjectFieldCount;
     initial_map->SetInObjectProperties(num_fields);
     initial_map->set_unused_property_fields(0);
     initial_map->set_instance_size(initial_map->instance_size() +
                                    num_fields * kPointerSize);
   }
 
   {  // -- E r r o r
-    Handle<JSFunction> error_fun = InstallFunction(
-        global, "Error", JS_ERROR_TYPE, JSObject::kHeaderSize,
-        isolate->initial_object_prototype(), Builtins::kIllegal);
-    InstallWithIntrinsicDefaultProto(isolate, error_fun,
-                                     Context::ERROR_FUNCTION_INDEX);
+    InstallError(isolate, global, factory->Error_string(),
+                 Context::ERROR_FUNCTION_INDEX);
   }
 
   {  // -- E v a l E r r o r
-    Handle<JSFunction> eval_error_fun = InstallFunction(
-        global, "EvalError", JS_ERROR_TYPE, JSObject::kHeaderSize,
-        isolate->initial_object_prototype(), Builtins::kIllegal);
-    InstallWithIntrinsicDefaultProto(isolate, eval_error_fun,
-                                     Context::EVAL_ERROR_FUNCTION_INDEX);
+    InstallError(isolate, global, factory->EvalError_string(),
+                 Context::EVAL_ERROR_FUNCTION_INDEX);
   }
 
   {  // -- R a n g e E r r o r
-    Handle<JSFunction> range_error_fun = InstallFunction(
-        global, "RangeError", JS_ERROR_TYPE, JSObject::kHeaderSize,
-        isolate->initial_object_prototype(), Builtins::kIllegal);
-    InstallWithIntrinsicDefaultProto(isolate, range_error_fun,
-                                     Context::RANGE_ERROR_FUNCTION_INDEX);
+    InstallError(isolate, global, factory->RangeError_string(),
+                 Context::RANGE_ERROR_FUNCTION_INDEX);
   }
 
   {  // -- R e f e r e n c e E r r o r
-    Handle<JSFunction> reference_error_fun = InstallFunction(
-        global, "ReferenceError", JS_ERROR_TYPE, JSObject::kHeaderSize,
-        isolate->initial_object_prototype(), Builtins::kIllegal);
-    InstallWithIntrinsicDefaultProto(isolate, reference_error_fun,
-                                     Context::REFERENCE_ERROR_FUNCTION_INDEX);
+    InstallError(isolate, global, factory->ReferenceError_string(),
+                 Context::REFERENCE_ERROR_FUNCTION_INDEX);
   }
 
   {  // -- S y n t a x E r r o r
-    Handle<JSFunction> syntax_error_fun = InstallFunction(
-        global, "SyntaxError", JS_ERROR_TYPE, JSObject::kHeaderSize,
-        isolate->initial_object_prototype(), Builtins::kIllegal);
-    InstallWithIntrinsicDefaultProto(isolate, syntax_error_fun,
-                                     Context::SYNTAX_ERROR_FUNCTION_INDEX);
+    InstallError(isolate, global, factory->SyntaxError_string(),
+                 Context::SYNTAX_ERROR_FUNCTION_INDEX);
   }
 
   {  // -- T y p e E r r o r
-    Handle<JSFunction> type_error_fun = InstallFunction(
-        global, "TypeError", JS_ERROR_TYPE, JSObject::kHeaderSize,
-        isolate->initial_object_prototype(), Builtins::kIllegal);
-    InstallWithIntrinsicDefaultProto(isolate, type_error_fun,
-                                     Context::TYPE_ERROR_FUNCTION_INDEX);
+    InstallError(isolate, global, factory->TypeError_string(),
+                 Context::TYPE_ERROR_FUNCTION_INDEX);
   }
 
   {  // -- U R I E r r o r
-    Handle<JSFunction> uri_error_fun = InstallFunction(
-        global, "URIError", JS_ERROR_TYPE, JSObject::kHeaderSize,
-        isolate->initial_object_prototype(), Builtins::kIllegal);
-    InstallWithIntrinsicDefaultProto(isolate, uri_error_fun,
-                                     Context::URI_ERROR_FUNCTION_INDEX);
+    InstallError(isolate, global, factory->URIError_string(),
+                 Context::URI_ERROR_FUNCTION_INDEX);
   }
 
   // Initialize the embedder data slot.
   Handle<FixedArray> embedder_data = factory->NewFixedArray(3);
   native_context()->set_embedder_data(*embedder_data);
 
   {  // -- J S O N
     Handle<String> name = factory->InternalizeUtf8String("JSON");
     Handle<JSFunction> cons = factory->NewFunction(name);
     JSFunction::SetInstancePrototype(cons,
@@ skipping 2376 matching lines @@
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 }  // namespace internal
 }  // namespace v8