[api] Expose FunctionCallbackInfo::NewTarget

src/x64/code-stubs-x64.cc

 // Copyright 2013 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.
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/code-stubs.h"
 #include "src/api-arguments.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 5386 matching lines @@
 
   typedef FunctionCallbackArguments FCA;
 
   STATIC_ASSERT(FCA::kContextSaveIndex == 6);
   STATIC_ASSERT(FCA::kCalleeIndex == 5);
   STATIC_ASSERT(FCA::kDataIndex == 4);
   STATIC_ASSERT(FCA::kReturnValueOffset == 3);
   STATIC_ASSERT(FCA::kReturnValueDefaultValueIndex == 2);
   STATIC_ASSERT(FCA::kIsolateIndex == 1);
   STATIC_ASSERT(FCA::kHolderIndex == 0);
-  STATIC_ASSERT(FCA::kArgsLength == 7);
+  STATIC_ASSERT(FCA::kNewTargetIndex == 7);
+  STATIC_ASSERT(FCA::kArgsLength == 8);
 
   __ PopReturnAddressTo(return_address);
 
+  // new target
+  __ PushRoot(Heap::kUndefinedValueRootIndex);
+
   // context save
   __ Push(context);
 
   // callee
   __ Push(callee);
 
   // call data
   __ Push(call_data);
   Register scratch = call_data;
   if (!this->call_data_undefined()) {
@@ skipping 13 matching lines @@
   // Push return address back on stack.
   __ PushReturnAddressFrom(return_address);
 
   if (!this->is_lazy()) {
     // load context from callee
     __ movp(context, FieldOperand(callee, JSFunction::kContextOffset));
   }
 
   // Allocate the v8::Arguments structure in the arguments' space since
   // it's not controlled by GC.
-  const int kApiStackSpace = 4;
+  const int kApiStackSpace = 3;
 
   PrepareCallApiFunction(masm, kApiStackSpace);
 
   // FunctionCallbackInfo::implicit_args_.
   int argc = this->argc();
   __ movp(StackSpaceOperand(0), scratch);
   __ addp(scratch, Immediate((argc + FCA::kArgsLength - 1) * kPointerSize));
   // FunctionCallbackInfo::values_.
   __ movp(StackSpaceOperand(1), scratch);
   // FunctionCallbackInfo::length_.
   __ Set(StackSpaceOperand(2), argc);
-  // FunctionCallbackInfo::is_construct_call_.
-  __ Set(StackSpaceOperand(3), 0);
 
 #if defined(__MINGW64__) || defined(_WIN64)
   Register arguments_arg = rcx;
   Register callback_arg = rdx;
 #else
   Register arguments_arg = rdi;
   Register callback_arg = rsi;
 #endif
 
   // It's okay if api_function_address == callback_arg
   // but not arguments_arg
   DCHECK(!api_function_address.is(arguments_arg));
 
   // v8::InvocationCallback's argument.
   __ leap(arguments_arg, StackSpaceOperand(0));
 
   ExternalReference thunk_ref =
       ExternalReference::invoke_function_callback(masm->isolate());
 
   // Accessor for FunctionCallbackInfo and first js arg.
   StackArgumentsAccessor args_from_rbp(rbp, FCA::kArgsLength + 1,
                                        ARGUMENTS_DONT_CONTAIN_RECEIVER);
   Operand context_restore_operand = args_from_rbp.GetArgumentOperand(
       FCA::kArgsLength - FCA::kContextSaveIndex);
-  Operand is_construct_call_operand = StackSpaceOperand(3);
+  Operand length_operand = StackSpaceOperand(2);
   Operand return_value_operand = args_from_rbp.GetArgumentOperand(
       this->is_store() ? 0 : FCA::kArgsLength - FCA::kReturnValueOffset);
   int stack_space = 0;
-  Operand* stack_space_operand = &is_construct_call_operand;
+  Operand* stack_space_operand = &length_operand;
   stack_space = argc + FCA::kArgsLength + 1;
   stack_space_operand = nullptr;
   CallApiFunctionAndReturn(masm, api_function_address, thunk_ref, callback_arg,
                            stack_space, stack_space_operand,
                            return_value_operand, &context_restore_operand);
 }
 
 
 void CallApiGetterStub::Generate(MacroAssembler* masm) {
 #if defined(__MINGW64__) || defined(_WIN64)
@@ skipping 74 matching lines @@
                            kStackUnwindSpace, nullptr, return_value_operand,
                            NULL);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64