stub api getters

src/x64/code-stubs-x64.cc

Index: src/x64/code-stubs-x64.cc
diff --git a/src/x64/code-stubs-x64.cc b/src/x64/code-stubs-x64.cc
index 757c58f90753242a51f988c61507f31f587a2e49..1e20da3117c5242439c09daabfa0f3e4c022bc82 100644
--- a/src/x64/code-stubs-x64.cc
+++ b/src/x64/code-stubs-x64.cc
@@ -5274,6 +5274,66 @@ void CallApiFunctionStub::Generate(MacroAssembler* masm) {
 }
 
 
+void CallApiGetterStub::Generate(MacroAssembler* masm) {
+  // ----------- S t a t e -------------
+  //  -- rsp[0]                  : return address
+  //  -- rsp[8]                  : name
+  //  -- rsp[16 - kArgsLength*8] : PropertyCallbackArguments object
+  //  -- ...
+  //  -- r8                    : api_function_address
+  // -----------------------------------
+
+#if defined(__MINGW64__) || defined(_WIN64)
+  Register getter_arg = r8;
+  Register accessor_info_arg = rdx;
+  Register name_arg = rcx;
+#else
+  Register getter_arg = rdx;
+  Register accessor_info_arg = rsi;
+  Register name_arg = rdi;
+#endif
+  Register api_function_address = r8;
+  Register scratch = rax;
+
+  // v8::Arguments::values_ and handler for name.
+  const int kStackSpace = PropertyCallbackArguments::kArgsLength + 1;
+
+  // Allocate v8::AccessorInfo in non-GCed stack space.
+  const int kArgStackSpace = 1;
+
+  __ lea(name_arg, Operand(rsp, 1 * kPointerSize));
+
+  __ PrepareCallApiFunction(kArgStackSpace);
+  __ lea(scratch, Operand(name_arg, 1 * kPointerSize));
+
+  // v8::PropertyAccessorInfo::args_.
+  __ movp(StackSpaceOperand(0), scratch);
+
+  // The context register (rsi) has been saved in PrepareCallApiFunction and
+  // could be used to pass arguments.
+  __ lea(accessor_info_arg, StackSpaceOperand(0));
+
+  Address thunk_address = FUNCTION_ADDR(&InvokeAccessorGetterCallback);
+
+  // It's okay if api_function_address == getter_arg
+  // but not accessor_info_arg or name_arg
+  ASSERT(!api_function_address.is(accessor_info_arg) &&
+         !api_function_address.is(name_arg));
+
+  // The name handler is counted as an argument.
+  StackArgumentsAccessor args(rbp, PropertyCallbackArguments::kArgsLength);
+  Operand return_value_operand = args.GetArgumentOperand(
+      PropertyCallbackArguments::kArgsLength - 1 -
+      PropertyCallbackArguments::kReturnValueOffset);
+  __ CallApiFunctionAndReturn(api_function_address,
+                              thunk_address,
+                              getter_arg,
+                              kStackSpace,
+                              return_value_operand,
+                              NULL);
+}
+
+
 #undef __
 
 } }  // namespace v8::internal