Implemented specialized stubs for API getters. This includes a number...

src/x64/codegen-x64.cc

Index: src/x64/codegen-x64.cc
===================================================================
--- src/x64/codegen-x64.cc	(revision 3149)
+++ src/x64/codegen-x64.cc	(working copy)
@@ -6771,7 +6771,7 @@
                               Label* throw_normal_exception,
                               Label* throw_termination_exception,
                               Label* throw_out_of_memory_exception,
-                              StackFrame::Type frame_type,
+                              ExitFrame::Mode mode,
                               bool do_gc,
                               bool always_allocate_scope) {
   // rax: result parameter for PerformGC, if any.
@@ -6854,7 +6854,7 @@
   __ j(zero, &failure_returned);
 
   // Exit the JavaScript to C++ exit frame.
-  __ LeaveExitFrame(frame_type, result_size_);
+  __ LeaveExitFrame(mode, result_size_);
   __ ret(0);
 
   // Handling of failure.
@@ -6984,12 +6984,12 @@
   // this by performing a garbage collection and retrying the
   // builtin once.
 
-  StackFrame::Type frame_type = is_debug_break ?
-      StackFrame::EXIT_DEBUG :
-      StackFrame::EXIT;
+  ExitFrame::Mode mode = is_debug_break ?
+      ExitFrame::MODE_DEBUG :
+      ExitFrame::MODE_NORMAL;
 
   // Enter the exit frame that transitions from JavaScript to C++.
-  __ EnterExitFrame(frame_type, result_size_);
+  __ EnterExitFrame(mode, result_size_);
 
   // rax: Holds the context at this point, but should not be used.
   //      On entry to code generated by GenerateCore, it must hold
@@ -7012,7 +7012,7 @@
                &throw_normal_exception,
                &throw_termination_exception,
                &throw_out_of_memory_exception,
-               frame_type,
+               mode,
                false,
                false);
 
@@ -7021,7 +7021,7 @@
                &throw_normal_exception,
                &throw_termination_exception,
                &throw_out_of_memory_exception,
-               frame_type,
+               mode,
                true,
                false);
 
@@ -7032,7 +7032,7 @@
                &throw_normal_exception,
                &throw_termination_exception,
                &throw_out_of_memory_exception,
-               frame_type,
+               mode,
                true,
                true);
 
@@ -7047,6 +7047,11 @@
 }
 
 
+void ApiGetterEntryStub::Generate(MacroAssembler* masm) {
+  UNREACHABLE();
+}
+
+
 void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   Label invoke, exit;
 #ifdef ENABLE_LOGGING_AND_PROFILING