Direct call API functions.

src/ia32/stub-cache-ia32.cc

 // Copyright 2006-2009 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 395 matching lines @@
                                                    Register holder,
                                                    Register name,
                                                    JSObject* holder_obj) {
   PushInterceptorArguments(masm, receiver, holder, name, holder_obj);
   __ CallExternalReference(
         ExternalReference(IC_Utility(IC::kLoadPropertyWithInterceptorOnly)),
         5);
 }
 
 
+// Amount of pointers to be reserved on stack for v8::Arguments::implicit_args_.

[antonm, 2010/11/09 13:56:19]

I am not a native speaker, but I would rather say 'number of pointers'

[antonm, 2010/11/09 13:56:19]

'v8::Arguments::implicit_args_': should either be 'for fast API call' or
constant renamed back, imho

+static const int kFastApiCallArguments = 3;
+
+
 // Reserves space for the extra arguments to FastHandleApiCall in the
 // caller's frame.
 //
 // These arguments are set by CheckPrototypes and GenerateFastApiCall.
 static void ReserveSpaceForFastApiCall(MacroAssembler* masm, Register scratch) {
   // ----------- S t a t e -------------
   //  -- esp[0] : return address
   //  -- esp[4] : last argument in the internal frame of the caller
   // -----------------------------------
   __ pop(scratch);
-  __ push(Immediate(Smi::FromInt(0)));
-  __ push(Immediate(Smi::FromInt(0)));
-  __ push(Immediate(Smi::FromInt(0)));
-  __ push(Immediate(Smi::FromInt(0)));
+  for (int i = 0; i < kFastApiCallArguments; i++) {
+    __ push(Immediate(Smi::FromInt(0)));
+  }
   __ push(scratch);
 }
 
 
 // Undoes the effects of ReserveSpaceForFastApiCall.
 static void FreeSpaceForFastApiCall(MacroAssembler* masm, Register scratch) {
   // ----------- S t a t e -------------
-  //  -- esp[0]  : return address
-  //  -- esp[4]  : last fast api call extra argument
+  //  -- esp[0]  : return address.
+  //  -- esp[4]  : last fast api call extra argument.
   //  -- ...
-  //  -- esp[16] : first fast api call extra argument
-  //  -- esp[20] : last argument in the internal frame
+  //  -- esp[kFastApiCallArguments * 4] : first fast api call extra argument.
+  //  -- esp[kFastApiCallArguments * 4 + 4] : last argument in the internal
+  //                                          frame.
   // -----------------------------------
   __ pop(scratch);
-  __ add(Operand(esp), Immediate(kPointerSize * 4));
+  __ add(Operand(esp), Immediate(kPointerSize * kFastApiCallArguments));
   __ push(scratch);
 }
 
 
 // Generates call to FastHandleApiCall builtin.
-static void GenerateFastApiCall(MacroAssembler* masm,
+static bool GenerateFastApiCall(MacroAssembler* masm,
                                 const CallOptimization& optimization,
-                                int argc) {
+                                int argc,
+                                Failure** failure) {
   // ----------- S t a t e -------------
   //  -- esp[0]              : return address
   //  -- esp[4]              : object passing the type check
   //                           (last fast api call extra argument,
   //                            set by CheckPrototypes)
-  //  -- esp[8]              : api call data
-  //  -- esp[12]             : api callback
-  //  -- esp[16]             : api function
+  //  -- esp[8]              : api function
   //                           (first fast api call extra argument)
-  //  -- esp[20]             : last argument
+  //  -- esp[12]             : api call data
+  //  -- esp[16]             : last argument
   //  -- ...
-  //  -- esp[(argc + 5) * 4] : first argument
-  //  -- esp[(argc + 6) * 4] : receiver
+  //  -- esp[(argc + 3) * 4] : first argument
+  //  -- esp[(argc + 4) * 4] : receiver
   // -----------------------------------
-
   // Get the function and setup the context.
   JSFunction* function = optimization.constant_function();
   __ mov(edi, Immediate(Handle<JSFunction>(function)));
   __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset));
 
   // Pass the additional arguments FastHandleApiCall expects.
-  __ mov(Operand(esp, 4 * kPointerSize), edi);
-  bool info_loaded = false;
-  Object* callback = optimization.api_call_info()->callback();
-  if (Heap::InNewSpace(callback)) {
-    info_loaded = true;
-    __ mov(ecx, Handle<CallHandlerInfo>(optimization.api_call_info()));
-    __ mov(ebx, FieldOperand(ecx, CallHandlerInfo::kCallbackOffset));
+  __ mov(Operand(esp, 2 * kPointerSize), edi);
+  Object* call_data = optimization.api_call_info()->data();
+  Handle<CallHandlerInfo> api_call_info_handle(optimization.api_call_info());
+  if (Heap::InNewSpace(call_data)) {
+    __ mov(ecx, api_call_info_handle);
+    __ mov(ebx, FieldOperand(ecx, CallHandlerInfo::kDataOffset));
     __ mov(Operand(esp, 3 * kPointerSize), ebx);
   } else {
-    __ mov(Operand(esp, 3 * kPointerSize), Immediate(Handle<Object>(callback)));
-  }
-  Object* call_data = optimization.api_call_info()->data();
-  if (Heap::InNewSpace(call_data)) {
-    if (!info_loaded) {
-      __ mov(ecx, Handle<CallHandlerInfo>(optimization.api_call_info()));
-    }
-    __ mov(ebx, FieldOperand(ecx, CallHandlerInfo::kDataOffset));
-    __ mov(Operand(esp, 2 * kPointerSize), ebx);
-  } else {
-    __ mov(Operand(esp, 2 * kPointerSize),
+    __ mov(Operand(esp, 3 * kPointerSize),
            Immediate(Handle<Object>(call_data)));
   }
 
-  // Set the number of arguments.
-  __ mov(eax, Immediate(argc + 4));
+  // Prepare arguments for ApiCallEntryStub.
+  __ lea(eax, Operand(esp, 3 * kPointerSize));
+  __ lea(ebx, Operand(esp, (argc + 3) * kPointerSize));
+  __ Set(edx, Immediate(argc));
 
-  // Jump to the fast api call builtin (tail call).
-  Handle<Code> code = Handle<Code>(
-      Builtins::builtin(Builtins::FastHandleApiCall));
-  ParameterCount expected(0);
-  __ InvokeCode(code, expected, expected,
-                RelocInfo::CODE_TARGET, JUMP_FUNCTION);
+  Object* callback = optimization.api_call_info()->callback();
+  Address api_function_address = v8::ToCData<Address>(callback);
+  ApiFunction fun(api_function_address);
+
+  ApiCallEntryStub stub(api_call_info_handle, &fun);
+
+  __ EnterInternalFrame();
+
+  // Emitting a stub call may try to allocate (if the code is not
+  // already generated).  Do not allow the assembler to perform a
+  // garbage collection but instead return the allocation failure
+  // object.
+  MaybeObject* result = masm->TryCallStub(&stub);
+  if (result->IsFailure()) {
+    *failure = Failure::cast(result);
+    return false;
+  }
+
+  __ LeaveInternalFrame();
+  __ ret((argc + 4) * kPointerSize);
+  return true;
 }
 
 
 class CallInterceptorCompiler BASE_EMBEDDED {
  public:
   CallInterceptorCompiler(StubCompiler* stub_compiler,
                           const ParameterCount& arguments,
                           Register name)
       : stub_compiler_(stub_compiler),
         arguments_(arguments),
         name_(name) {}
 
-  void Compile(MacroAssembler* masm,
+  bool Compile(MacroAssembler* masm,
                JSObject* object,
                JSObject* holder,
                String* name,
                LookupResult* lookup,
                Register receiver,
                Register scratch1,
                Register scratch2,
                Register scratch3,
-               Label* miss) {
+               Label* miss,
+               Failure** failure) {
     ASSERT(holder->HasNamedInterceptor());
     ASSERT(!holder->GetNamedInterceptor()->getter()->IsUndefined());
 
     // Check that the receiver isn't a smi.
     __ test(receiver, Immediate(kSmiTagMask));
     __ j(zero, miss, not_taken);
 
     CallOptimization optimization(lookup);
 
     if (optimization.is_constant_call()) {
-      CompileCacheable(masm,
-                       object,
-                       receiver,
-                       scratch1,
-                       scratch2,
-                       scratch3,
-                       holder,
-                       lookup,
-                       name,
-                       optimization,
-                       miss);
+      return CompileCacheable(masm,
+                              object,
+                              receiver,
+                              scratch1,
+                              scratch2,
+                              scratch3,
+                              holder,
+                              lookup,
+                              name,
+                              optimization,
+                              miss,
+                              failure);
     } else {
       CompileRegular(masm,
                      object,
                      receiver,
                      scratch1,
                      scratch2,
                      scratch3,
                      name,
                      holder,
                      miss);
+      return true;
     }
   }
 
  private:
-  void CompileCacheable(MacroAssembler* masm,
+  bool CompileCacheable(MacroAssembler* masm,
                         JSObject* object,
                         Register receiver,
                         Register scratch1,
                         Register scratch2,
                         Register scratch3,
                         JSObject* interceptor_holder,
                         LookupResult* lookup,
                         String* name,
                         const CallOptimization& optimization,
-                        Label* miss_label) {
+                        Label* miss_label,
+                        Failure** failure) {
     ASSERT(optimization.is_constant_call());
     ASSERT(!lookup->holder()->IsGlobalObject());
 
     int depth1 = kInvalidProtoDepth;
     int depth2 = kInvalidProtoDepth;
     bool can_do_fast_api_call = false;
     if (optimization.is_simple_api_call() &&
         !lookup->holder()->IsGlobalObject()) {
       depth1 =
           optimization.GetPrototypeDepthOfExpectedType(object,
@@ skipping 41 matching lines @@
     } else {
       // CheckPrototypes has a side effect of fetching a 'holder'
       // for API (object which is instanceof for the signature).  It's
       // safe to omit it here, as if present, it should be fetched
       // by the previous CheckPrototypes.
       ASSERT(depth2 == kInvalidProtoDepth);
     }
 
     // Invoke function.
     if (can_do_fast_api_call) {
-      GenerateFastApiCall(masm, optimization, arguments_.immediate());
+      bool success = GenerateFastApiCall(masm, optimization,
+                                         arguments_.immediate(), failure);
+      if (!success) {
+        return false;
+      }
     } else {
       __ InvokeFunction(optimization.constant_function(), arguments_,
                         JUMP_FUNCTION);
     }
 
     // Deferred code for fast API call case---clean preallocated space.
     if (can_do_fast_api_call) {
       __ bind(&miss_cleanup);
       FreeSpaceForFastApiCall(masm, scratch1);
       __ jmp(miss_label);
     }
 
     // Invoke a regular function.
     __ bind(&regular_invoke);
     if (can_do_fast_api_call) {
       FreeSpaceForFastApiCall(masm, scratch1);
     }
+
+    return true;
   }
 
   void CompileRegular(MacroAssembler* masm,
                       JSObject* object,
                       Register receiver,
                       Register scratch1,
                       Register scratch2,
                       Register scratch3,
                       String* name,
                       JSObject* interceptor_holder,
@@ skipping 376 matching lines @@
 
   // Check that the maps haven't changed.
   Register reg =
       CheckPrototypes(object, receiver, holder, scratch1,
                       scratch2, scratch3, name, miss);
 
   Handle<AccessorInfo> callback_handle(callback);
 
   __ EnterInternalFrame();
   // Push the stack address where the list of arguments ends.
-  __ mov(scratch2, esp);
-  __ sub(Operand(scratch2), Immediate(2 * kPointerSize));
+  __ lea(scratch2, Operand(esp, -2 * kPointerSize));
   __ push(scratch2);
   __ push(receiver);  // receiver
   __ push(reg);  // holder
   // Push data from AccessorInfo.
   if (Heap::InNewSpace(callback_handle->data())) {
     __ mov(scratch2, Immediate(callback_handle));
     __ push(FieldOperand(scratch2, AccessorInfo::kDataOffset));
   } else {
     __ push(Immediate(Handle<Object>(callback_handle->data())));
   }
   __ push(name_reg);  // name
   // Save a pointer to where we pushed the arguments pointer.
   // This will be passed as the const AccessorInfo& to the C++ callback.
-  __ mov(eax, esp);
-  __ add(Operand(eax), Immediate(4 * kPointerSize));
+  STATIC_ASSERT(ApiGetterEntryStub::kStackSpace == 5);
+  __ lea(eax, Operand(esp, 4 * kPointerSize));
   __ mov(ebx, esp);
 
   // Do call through the api.
-  ASSERT_EQ(5, ApiGetterEntryStub::kStackSpace);
   Address getter_address = v8::ToCData<Address>(callback->getter());
   ApiFunction fun(getter_address);
   ApiGetterEntryStub stub(callback_handle, &fun);
   // Emitting a stub call may try to allocate (if the code is not
   // already generated).  Do not allow the assembler to perform a
   // garbage collection but instead return the allocation failure
   // object.
   Object* result = NULL;  // Initialization to please compiler.
   { MaybeObject* try_call_result = masm()->TryCallStub(&stub);
     if (!try_call_result->ToObject(&result)) {
@@ skipping 1121 matching lines @@
                         ebx, edx, edi, name, &miss);
       }
       break;
     }
 
     default:
       UNREACHABLE();
   }
 
   if (depth != kInvalidProtoDepth) {
-    GenerateFastApiCall(masm(), optimization, argc);
+    Failure* failure;
+    bool success = GenerateFastApiCall(masm(), optimization, argc, &failure);
+    if (!success) {
+      return failure;
+    }
   } else {
     __ InvokeFunction(function, arguments(), JUMP_FUNCTION);
   }
 
   // Handle call cache miss.
   __ bind(&miss);
   if (depth != kInvalidProtoDepth) {
     FreeSpaceForFastApiCall(masm(), eax);
   }
   __ bind(&miss_in_smi_check);
@@ skipping 24 matching lines @@
   // Get the number of arguments.
   const int argc = arguments().immediate();
 
   LookupResult lookup;
   LookupPostInterceptor(holder, name, &lookup);
 
   // Get the receiver from the stack.
   __ mov(edx, Operand(esp, (argc + 1) * kPointerSize));
 
   CallInterceptorCompiler compiler(this, arguments(), ecx);
-  compiler.Compile(masm(),
-                   object,
-                   holder,
-                   name,
-                   &lookup,
-                   edx,
-                   ebx,
-                   edi,
-                   eax,
-                   &miss);
+  Failure* failure;
+  bool success = compiler.Compile(masm(),
+                                  object,
+                                  holder,
+                                  name,
+                                  &lookup,
+                                  edx,
+                                  ebx,
+                                  edi,
+                                  eax,
+                                  &miss,
+                                  &failure);
+  if (!success) {
+    return false;
+  }
 
   // Restore receiver.
   __ mov(edx, Operand(esp, (argc + 1) * kPointerSize));
 
   // Check that the function really is a function.
   __ test(eax, Immediate(kSmiTagMask));
   __ j(zero, &miss, not_taken);
   __ CmpObjectType(eax, JS_FUNCTION_TYPE, ebx);
   __ j(not_equal, &miss, not_taken);
 
@@ skipping 822 matching lines @@
   // Return the generated code.
   return GetCode();
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32