Optimizing HandleScope. Also fixed HandleScope destruction when API getter th...

src/x64/macro-assembler-x64.h

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 798 matching lines @@
   // of parameters.
   void TailCallExternalReference(const ExternalReference& ext,
                                  int num_arguments,
                                  int result_size);
 
   // Convenience function: tail call a runtime routine (jump).
   void TailCallRuntime(Runtime::FunctionId fid,
                        int num_arguments,
                        int result_size);
 
-  void PushHandleScope(Register scratch);
-
-  // Pops a handle scope using the specified scratch register and
-  // ensuring that saved register is left unchanged.
-  void PopHandleScope(Register saved, Register scratch);
-
-  // As PopHandleScope, but does not perform a GC.  Instead, returns a
-  // retry after GC failure object if GC is necessary.
-  Object* TryPopHandleScope(Register saved, Register scratch);
-
   // Jump to a runtime routine.
   void JumpToExternalReference(const ExternalReference& ext, int result_size);
 
+  // Prepares stack to put arguments (aligns and so on).
+  // Uses calle-saved esi to restore stack state after call.
+  void PrepareCallApiFunction(int stack_space);
+
+  // Tail call an API function (jump). Allocates HandleScope, extracts
+  // returned value from handle and propogates exceptions.
+  // Clobbers ebx, edi and caller-save registers.
+  void CallApiFunctionAndReturn(ApiFunction* function);
+
   // Before calling a C-function from generated code, align arguments on stack.
   // After aligning the frame, arguments must be stored in esp[0], esp[4],
   // etc., not pushed. The argument count assumes all arguments are word sized.
   // The number of slots reserved for arguments depends on platform. On Windows
   // stack slots are reserved for the arguments passed in registers. On other
   // platforms stack slots are only reserved for the arguments actually passed
   // on the stack.
   void PrepareCallCFunction(int num_arguments);
 
   // Calls a C function and cleans up the space for arguments allocated
@@ skipping 848 matching lines @@
       Jump(adaptor, RelocInfo::CODE_TARGET);
     }
     bind(&invoke);
   }
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_MACRO_ASSEMBLER_X64_H_