[inspector] exposed builtins for injected script source

src/api.cc

 // Copyright 2012 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/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 9538 matching lines @@
   if (object->IsJSSetIterator()) {
     i::Handle<i::JSSetIterator> it = i::Handle<i::JSSetIterator>::cast(object);
     *is_key_value = false;
     if (!it->HasMore()) return v8::Array::New(v8_isolate);
     return Utils::ToLocal(
         SetAsArray(isolate, it->table(), i::Smi::cast(it->index())->value()));
   }
   return v8::MaybeLocal<v8::Array>();
 }
 
+Local<Function> debug::GetBuiltin(Isolate* v8_isolate, Builtin builtin) {
+  i::Isolate* isolate = reinterpret_cast<i::Isolate*>(v8_isolate);
+  ENTER_V8(isolate);
+  i::HandleScope handle_scope(isolate);
+  i::Builtins::Name name;
+  int len = 1;
+  switch (builtin) {
+    case kObjectKeys:
+      name = i::Builtins::kObjectKeys;
+      break;
+    case kObjectGetPrototypeOf:
+      name = i::Builtins::kObjectGetPrototypeOf;
+      break;
+    case kObjectGetOwnPropertyDescriptor:
+      name = i::Builtins::kObjectGetOwnPropertyDescriptor;
+      len = 2;
+      break;
+    case kObjectGetOwnPropertyNames:
+      name = i::Builtins::kObjectGetOwnPropertyNames;
+      break;
+    case kObjectGetOwnPropertySymbols:
+      name = i::Builtins::kObjectGetOwnPropertySymbols;
+      break;
+  }
+  i::Handle<i::Code> call_code(isolate->builtins()->builtin(name));
+  i::Handle<i::JSFunction> fun =
+      isolate->factory()->NewFunctionWithoutPrototype(
+          isolate->factory()->empty_string(), call_code, false);
+  fun->shared()->set_native(true);

[Yang, 2017/03/24 21:19:31]

No need to set this native. We only need this for stack traces.

[kozy, 2017/03/24 21:39:55]

Done.

+  fun->shared()->DontAdaptArguments();
+  fun->shared()->set_length(len);

[Yang, 2017/03/24 21:19:31]

Also no need to set length, I think.

[kozy, 2017/03/24 21:39:55]

Done.

+  return Utils::ToLocal(handle_scope.CloseAndEscape(fun));
+}
+
 MaybeLocal<debug::Script> debug::GeneratorObject::Script() {
   i::Handle<i::JSGeneratorObject> obj = Utils::OpenHandle(this);
   i::Object* maybe_script = obj->function()->shared()->script();
   if (!maybe_script->IsScript()) return MaybeLocal<debug::Script>();
   i::Handle<i::Script> script(i::Script::cast(maybe_script), obj->GetIsolate());
   return ToApiHandle<debug::Script>(script);
 }
 
 Local<Function> debug::GeneratorObject::Function() {
   i::Handle<i::JSGeneratorObject> obj = Utils::OpenHandle(this);
@@ skipping 747 matching lines @@
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 }  // namespace internal
 }  // namespace v8