Direct call api functions (arm implementation)

src/arm/macro-assembler-arm.h

 // Copyright 2010 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 570 matching lines @@
 
   // ---------------------------------------------------------------------------
   // Runtime calls
 
   // Call a code stub.
   void CallStub(CodeStub* stub, Condition cond = al);
 
   // Call a code stub.
   void TailCallStub(CodeStub* stub, Condition cond = al);
 
+  // Tail call a code stub (jump) and return the code object called.  Try to
+  // generate the code if necessary.  Do not perform a GC but instead return
+  // a retry after GC failure.
+  MUST_USE_RESULT MaybeObject* TryTailCallStub(CodeStub* stub,
+                                               Condition cond = al);
+
   // Call a runtime routine.
   void CallRuntime(Runtime::Function* f, int num_arguments);
   void CallRuntimeSaveDoubles(Runtime::FunctionId id);
 
   // Convenience function: Same as above, but takes the fid instead.
   void CallRuntime(Runtime::FunctionId fid, int num_arguments);
 
   // Convenience function: call an external reference.
   void CallExternalReference(const ExternalReference& ext,
                              int num_arguments);
 
   // Tail call of a runtime routine (jump).
   // Like JumpToExternalReference, but also takes care of passing the number
   // of parameters.
   void TailCallExternalReference(const ExternalReference& ext,
                                  int num_arguments,
                                  int result_size);
 
+  // Tail call of a runtime routine (jump). Try to generate the code if
+  // necessary. Do not perform a GC but instead return a retry after GC
+  // failure.
+  MUST_USE_RESULT MaybeObject* TryTailCallExternalReference(
+      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);
 
   // Before calling a C-function from generated code, align arguments on stack.
   // After aligning the frame, non-register arguments must be stored in
   // sp[0], sp[4], etc., not pushed. The argument count assumes all arguments
   // are word sized.
   // Some compilers/platforms require the stack to be aligned when calling
   // C++ code.
   // Needs a scratch register to do some arithmetic. This register will be
   // trashed.
   void PrepareCallCFunction(int num_arguments, Register scratch);
 
   // Calls a C function and cleans up the space for arguments allocated
   // by PrepareCallCFunction. The called function is not allowed to trigger a
   // garbage collection, since that might move the code and invalidate the
   // return address (unless this is somehow accounted for by the called
   // function).
   void CallCFunction(ExternalReference function, int num_arguments);
   void CallCFunction(Register function, int num_arguments);
 
+  // Creates the exit frame, pushes the arguments and aligns the stack
+  // for the C call. saves the fp and context in top
+  // arg_stack_space - space allocated for the structure (e.g.

[antonm, 2011/01/13 12:47:08]

nit: we use |<parameter name>| convention.  Ditto for unwind_space below

[antonm, 2011/01/13 12:47:08]

maybe some other name?  allocation_size or something like that?

[Zaheer, 2011/01/13 14:17:09]

Done.

[Zaheer, 2011/01/13 14:17:09]

hmm arg_stack_size is taken from x64. do you insist on changing it

+  // v8::arguments in a direct call) on top of the exit frame
+  // unwind_space - space to be unwound on exit (includes the call js
+  // arguments space and the additonal space allocated for the fast call)
+  void PrepareCallApiFunction(int arg_stack_space,
+                              int unwind_space);
+
+  void EnterExitFramePrologue(int arg_stack_space);
+  void EnterExitFrameEpilogue(int unwind_space);
+
+  // Calls an API function. Allocates HandleScope, extracts
+  // returned value from handle and propagates exceptions.
+  // Restores context.
+  MaybeObject* TryCallApiFunctionAndReturn(ApiFunction* function);
+
   // Jump to a runtime routine.
   void JumpToExternalReference(const ExternalReference& builtin);
 
+  MaybeObject* TryJumpToExternalReference(const ExternalReference& ext);
+
   // Invoke specified builtin JavaScript function. Adds an entry to
   // the unresolved list if the name does not resolve.
   void InvokeBuiltin(Builtins::JavaScript id, InvokeJSFlags flags);
 
   // Store the code object for the given builtin in the target register and
   // setup the function in r1.
   void GetBuiltinEntry(Register target, Builtins::JavaScript id);
 
   // Store the function for the given builtin in the target register.
   void GetBuiltinFunction(Register target, Builtins::JavaScript id);
@@ skipping 175 matching lines @@
 #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__)
 #define ACCESS_MASM(masm) masm->stop(__FILE_LINE__); masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_MACRO_ASSEMBLER_ARM_H_