MIPS: new style of property/function callbacks

src/mips/stub-cache-mips.cc

 // Copyright 2012 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 824 matching lines @@
       ExternalReference(IC_Utility(IC::kLoadPropertyWithInterceptorOnly),
           masm->isolate());
   __ PrepareCEntryArgs(6);
   __ PrepareCEntryFunction(ref);
 
   CEntryStub stub(1);
   __ CallStub(&stub);
 }
 
 
-static const int kFastApiCallArguments = 4;
-
+static const int kFastApiCallArguments = FunctionCallbackArguments::kArgsLength;
 
 // Reserves space for the extra arguments to API function in the
 // caller's frame.
 //
 // These arguments are set by CheckPrototypes and GenerateFastApiDirectCall.
 static void ReserveSpaceForFastApiCall(MacroAssembler* masm,
                                        Register scratch) {
   ASSERT(Smi::FromInt(0) == 0);
   for (int i = 0; i < kFastApiCallArguments; i++) {
     __ push(zero_reg);
   }
 }
 
 
 // Undoes the effects of ReserveSpaceForFastApiCall.
 static void FreeSpaceForFastApiCall(MacroAssembler* masm) {
   __ Drop(kFastApiCallArguments);
 }
 
 
 static void GenerateFastApiDirectCall(MacroAssembler* masm,
                                       const CallOptimization& optimization,
                                       int argc) {
   // ----------- S t a t e -------------
   //  -- sp[0]              : holder (set by CheckPrototypes)
   //  -- sp[4]              : callee JS function
   //  -- sp[8]              : call data
   //  -- sp[12]             : isolate
-  //  -- sp[16]             : last JS argument
+  //  -- sp[16]             : ReturnValue
+  //  -- sp[20]             : last JS argument
   //  -- ...
-  //  -- sp[(argc + 3) * 4] : first JS argument
-  //  -- sp[(argc + 4) * 4] : receiver
+  //  -- sp[(argc + 4) * 4] : first JS argument
+  //  -- sp[(argc + 5) * 4] : receiver
   // -----------------------------------
   // Get the function and setup the context.
   Handle<JSFunction> function = optimization.constant_function();
   __ LoadHeapObject(t1, function);
   __ lw(cp, FieldMemOperand(t1, JSFunction::kContextOffset));
 
   // Pass the additional arguments.
   Handle<CallHandlerInfo> api_call_info = optimization.api_call_info();
   Handle<Object> call_data(api_call_info->data(), masm->isolate());
   if (masm->isolate()->heap()->InNewSpace(*call_data)) {
     __ li(a0, api_call_info);
     __ lw(t2, FieldMemOperand(a0, CallHandlerInfo::kDataOffset));
   } else {
     __ li(t2, call_data);
   }
 
   __ li(t3, Operand(ExternalReference::isolate_address(masm->isolate())));
-  // Store JS function, call data and isolate.
+  // Store JS function, call data, isolate and ReturnValue.
   __ sw(t1, MemOperand(sp, 1 * kPointerSize));
   __ sw(t2, MemOperand(sp, 2 * kPointerSize));
   __ sw(t3, MemOperand(sp, 3 * kPointerSize));
+  __ LoadRoot(t1, Heap::kUndefinedValueRootIndex);
+  __ sw(t1, MemOperand(sp, 4 * kPointerSize));
 
   // Prepare arguments.
-  __ Addu(a2, sp, Operand(3 * kPointerSize));
+  __ Addu(a2, sp, Operand(4 * kPointerSize));
 
   // Allocate the v8::Arguments structure in the arguments' space since
   // it's not controlled by GC.
   const int kApiStackSpace = 4;
 
   FrameScope frame_scope(masm, StackFrame::MANUAL);
   __ EnterExitFrame(false, kApiStackSpace);
 
   // NOTE: the O32 abi requires a0 to hold a special pointer when returning a
   // struct from the function (which is currently the case). This means we pass
@@ skipping 10 matching lines @@
   __ Addu(t0, a2, Operand(argc * kPointerSize));
   __ sw(t0, MemOperand(a1, 1 * kPointerSize));
   // v8::Arguments::length_ = argc
   __ li(t0, Operand(argc));
   __ sw(t0, MemOperand(a1, 2 * kPointerSize));
   // v8::Arguments::is_construct_call = 0
   __ sw(zero_reg, MemOperand(a1, 3 * kPointerSize));
 
   const int kStackUnwindSpace = argc + kFastApiCallArguments + 1;
   Address function_address = v8::ToCData<Address>(api_call_info->callback());
+  bool returns_handle =
+      !CallbackTable::ReturnsVoid(masm->isolate(), function_address);
   ApiFunction fun(function_address);
   ExternalReference ref =
       ExternalReference(&fun,
                         ExternalReference::DIRECT_API_CALL,
                         masm->isolate());
   AllowExternalCallThatCantCauseGC scope(masm);
-  __ CallApiFunctionAndReturn(ref, kStackUnwindSpace);
+  __ CallApiFunctionAndReturn(ref,
+                              kStackUnwindSpace,
+                              returns_handle,
+                              kFastApiCallArguments + 1);
 }
 
 class CallInterceptorCompiler BASE_EMBEDDED {
  public:
   CallInterceptorCompiler(StubCompiler* stub_compiler,
                           const ParameterCount& arguments,
                           Register name,
                           Code::ExtraICState extra_ic_state)
       : stub_compiler_(stub_compiler),
         arguments_(arguments),
@@ skipping 453 matching lines @@
   // the exit frame to make GC aware of them and store pointers to them.
   __ push(receiver());
   __ mov(scratch2(), sp);  // scratch2 = AccessorInfo::args_
   if (heap()->InNewSpace(callback->data())) {
     __ li(scratch3(), callback);
     __ lw(scratch3(), FieldMemOperand(scratch3(),
                                       ExecutableAccessorInfo::kDataOffset));
   } else {
     __ li(scratch3(), Handle<Object>(callback->data(), isolate()));
   }
-  __ Subu(sp, sp, 4 * kPointerSize);
-  __ sw(reg, MemOperand(sp, 3 * kPointerSize));
-  __ sw(scratch3(), MemOperand(sp, 2 * kPointerSize));
+  __ Subu(sp, sp, 5 * kPointerSize);
+  __ sw(reg, MemOperand(sp, 4 * kPointerSize));
+  __ sw(scratch3(), MemOperand(sp, 3 * kPointerSize));
   __ li(scratch3(),
         Operand(ExternalReference::isolate_address(isolate())));
-  __ sw(scratch3(), MemOperand(sp, 1 * kPointerSize));
+  __ LoadRoot(scratch4(), Heap::kUndefinedValueRootIndex);
+  __ sw(scratch3(), MemOperand(sp, 2 * kPointerSize));
+  __ sw(scratch4(), MemOperand(sp, 1 * kPointerSize));
   __ sw(name(), MemOperand(sp, 0 * kPointerSize));
 
   __ mov(a2, scratch2());  // Saved in case scratch2 == a1.
   __ mov(a1, sp);  // a1 (first argument - see note below) = Handle<Name>
 
   // NOTE: the O32 abi requires a0 to hold a special pointer when returning a
   // struct from the function (which is currently the case). This means we pass
   // the arguments in a1-a2 instead of a0-a1. TryCallApiFunctionAndReturn
   // will handle setting up a0.
 
   const int kApiStackSpace = 1;
   FrameScope frame_scope(masm(), StackFrame::MANUAL);
   __ EnterExitFrame(false, kApiStackSpace);
 
   // Create AccessorInfo instance on the stack above the exit frame with
   // scratch2 (internal::Object** args_) as the data.
   __ sw(a2, MemOperand(sp, kPointerSize));
   // a2 (second argument - see note above) = AccessorInfo&
   __ Addu(a2, sp, kPointerSize);
 
-  const int kStackUnwindSpace = 5;
+  const int kStackUnwindSpace = kFastApiCallArguments + 1;
   Address getter_address = v8::ToCData<Address>(callback->getter());
+  bool returns_handle =
+      !CallbackTable::ReturnsVoid(isolate(), getter_address);
   ApiFunction fun(getter_address);
   ExternalReference ref = ExternalReference(
       &fun, ExternalReference::DIRECT_GETTER_CALL, isolate());
-  __ CallApiFunctionAndReturn(ref, kStackUnwindSpace);
+  __ CallApiFunctionAndReturn(ref,
+                              kStackUnwindSpace,
+                              returns_handle,
+                              3);
 }
 
 
 void BaseLoadStubCompiler::GenerateLoadInterceptor(
     Register holder_reg,
     Handle<JSObject> object,
     Handle<JSObject> interceptor_holder,
     LookupResult* lookup,
     Handle<Name> name) {
   ASSERT(interceptor_holder->HasNamedInterceptor());
@@ skipping 2408 matching lines @@
     TailCallBuiltin(masm, Builtins::kKeyedStoreIC_Slow);
   }
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS