[builtins] Add receiver to builtin exit frames

src/frames-inl.h

 // 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.
 
 #ifndef V8_FRAMES_INL_H_
 #define V8_FRAMES_INL_H_
 
 #include "src/frames.h"
 #include "src/isolate.h"
 #include "src/objects-inl.h"
@@ skipping 83 matching lines @@
 }
 
 
 inline ExitFrame::ExitFrame(StackFrameIteratorBase* iterator)
     : StackFrame(iterator) {
 }
 
 inline BuiltinExitFrame::BuiltinExitFrame(StackFrameIteratorBase* iterator)
     : ExitFrame(iterator) {}
 
-inline Object* BuiltinExitFrame::function_slot_object() const {
+inline Object* BuiltinExitFrame::target_slot_object() const {
   return Memory::Object_at(fp() + BuiltinExitFrameConstants::kTargetOffset);
 }
 
+inline Object* BuiltinExitFrame::new_target_slot_object() const {
+  return Memory::Object_at(fp() + BuiltinExitFrameConstants::kNewTargetOffset);
+}
+
+inline Object* BuiltinExitFrame::receiver_slot_object() const {
+  // The receiver is the first argument on the frame.
+  // fp[1]: return address.
+  // fp[2]: the last argument (new target).
+  // fp[4]: argc.
+  // fp[2 + argc - 1]: receiver.
+  Object* argc_slot =
+      Memory::Object_at(fp() + BuiltinExitFrameConstants::kArgcOffset);
+  DCHECK(argc_slot->IsSmi());
+  int argc = Smi::cast(argc_slot)->value();
+
+  const int receiverOffset =
+      BuiltinExitFrameConstants::kNewTargetOffset + (argc - 1) * kPointerSize;
+  return Memory::Object_at(fp() + receiverOffset);
+}
+
 inline StandardFrame::StandardFrame(StackFrameIteratorBase* iterator)
     : StackFrame(iterator) {
 }
 
 
 inline Object* StandardFrame::GetExpression(int index) const {
   return Memory::Object_at(GetExpressionAddress(index));
 }
 
 
@@ skipping 182 matching lines @@
   DCHECK(frame_->is_java_script() || frame_->is_exit() ||
          frame_->is_builtin_exit());
   return frame_;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_FRAMES_INL_H_