deps: back-port 306c412c from v8 upstream

The patch has been modified to maintain ABI compatibility.  The original
change removes the v8::FunctionCallbackInfo<T>::is_construct_call_ field
from deps/v8/include/v8.h.  The field is set directly by JIT-ted code so
the removal of those code paths has been backed out as well.

Original commit message:

    [api] Expose FunctionCallbackInfo::NewTarget

    This is needed by Blink to implement the Custom Elements spec.

    BUG=v8:4261
    LOG=y

    Review-Url: https://codereview.chromium.org/1910253005
    Cr-Commit-Position: refs/heads/master@{#35833}

Fixes: #9288
PR-URL: #9293
Reviewed-By: Ali Ijaz Sheikh <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Myles Borins <[email protected]>

Author: bnoordhuis

deps/v8/include/v8.h

@@ -3177,12 +3177,13 @@ class FunctionCallbackInfo {
                           Local<Function> Callee() const);
   V8_INLINE Local<Object> This() const;
   V8_INLINE Local<Object> Holder() const;
+  V8_INLINE Local<Value> NewTarget() const;
   V8_INLINE bool IsConstructCall() const;
   V8_INLINE Local<Value> Data() const;
   V8_INLINE Isolate* GetIsolate() const;
   V8_INLINE ReturnValue<T> GetReturnValue() const;
   // This shouldn't be public, but the arm compiler needs it.
-  static const int kArgsLength = 7;
+  static const int kArgsLength = 8;
 
  protected:
   friend class internal::FunctionCallbackArguments;
@@ -3194,6 +3195,7 @@ class FunctionCallbackInfo {
   static const int kDataIndex = 4;
   static const int kCalleeIndex = 5;
   static const int kContextSaveIndex = 6;
+  static const int kNewTargetIndex = 7;
 
   V8_INLINE FunctionCallbackInfo(internal::Object** implicit_args,
                    internal::Object** values,
@@ -7902,6 +7904,11 @@ Local<Object> FunctionCallbackInfo<T>::Holder() const {
       &implicit_args_[kHolderIndex]));
 }
 
+template<typename T>
+Local<Value> FunctionCallbackInfo<T>::NewTarget() const {
+  return Local<Value>(
+      reinterpret_cast<Value*>(&implicit_args_[kNewTargetIndex]));
+}
 
 template<typename T>
 Local<Value> FunctionCallbackInfo<T>::Data() const {

deps/v8/src/api-arguments.h

@@ -206,19 +206,22 @@ class FunctionCallbackArguments
   static const int kIsolateIndex = T::kIsolateIndex;
   static const int kCalleeIndex = T::kCalleeIndex;
   static const int kContextSaveIndex = T::kContextSaveIndex;
+  static const int kNewTargetIndex = T::kNewTargetIndex;
 
   FunctionCallbackArguments(internal::Isolate* isolate, internal::Object* data,
                             internal::HeapObject* callee,
-                            internal::Object* holder, internal::Object** argv,
-                            int argc, bool is_construct_call)
+                            internal::Object* holder,
+                            internal::HeapObject* new_target,
+                            internal::Object** argv, int argc)
       : Super(isolate),
         argv_(argv),
         argc_(argc),
-        is_construct_call_(is_construct_call) {
+        is_construct_call_(!new_target->IsUndefined()) {
     Object** values = begin();
     values[T::kDataIndex] = data;
     values[T::kCalleeIndex] = callee;
     values[T::kHolderIndex] = holder;
+    values[T::kNewTargetIndex] = new_target;
     values[T::kContextSaveIndex] = isolate->heap()->the_hole_value();
     values[T::kIsolateIndex] = reinterpret_cast<internal::Object*>(isolate);
     // Here the hole is set as default value.

deps/v8/src/arm/builtins-arm.cc

@@ -604,16 +604,9 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
     // r0: number of arguments
     // r1: constructor function
     // r3: new target
-    if (is_api_function) {
-      __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset));
-      Handle<Code> code =
-          masm->isolate()->builtins()->HandleApiCallConstruct();
-      __ Call(code, RelocInfo::CODE_TARGET);
-    } else {
-      ParameterCount actual(r0);
-      __ InvokeFunction(r1, r3, actual, CALL_FUNCTION,
-                        CheckDebugStepCallWrapper());
-    }
+    ParameterCount actual(r0);
+    __ InvokeFunction(r1, r3, actual, CALL_FUNCTION,
+                      CheckDebugStepCallWrapper());
 
     // Store offset of return address for deoptimizer.
     if (create_implicit_receiver && !is_api_function) {

deps/v8/src/arm/code-stubs-arm.cc

@@ -5423,7 +5423,11 @@ void CallApiCallbackStub::Generate(MacroAssembler* masm) {
   STATIC_ASSERT(FCA::kReturnValueDefaultValueIndex == 2);
   STATIC_ASSERT(FCA::kIsolateIndex == 1);
   STATIC_ASSERT(FCA::kHolderIndex == 0);
-  STATIC_ASSERT(FCA::kArgsLength == 7);
+  STATIC_ASSERT(FCA::kNewTargetIndex == 7);
+  STATIC_ASSERT(FCA::kArgsLength == 8);
+
+  // new target
+  __ PushRoot(Heap::kUndefinedValueRootIndex);
 
   // context save
   __ push(context);

deps/v8/src/arm64/builtins-arm64.cc

@@ -605,16 +605,9 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
     // x0: number of arguments
     // x1: constructor function
     // x3: new target
-    if (is_api_function) {
-      __ Ldr(cp, FieldMemOperand(constructor, JSFunction::kContextOffset));
-      Handle<Code> code =
-          masm->isolate()->builtins()->HandleApiCallConstruct();
-      __ Call(code, RelocInfo::CODE_TARGET);
-    } else {
-      ParameterCount actual(argc);
-      __ InvokeFunction(constructor, new_target, actual, CALL_FUNCTION,
-                        CheckDebugStepCallWrapper());
-    }
+    ParameterCount actual(argc);
+    __ InvokeFunction(constructor, new_target, actual, CALL_FUNCTION,
+                      CheckDebugStepCallWrapper());
 
     // Store offset of return address for deoptimizer.
     if (create_implicit_receiver && !is_api_function) {

deps/v8/src/arm64/code-stubs-arm64.cc

@@ -5807,9 +5807,15 @@ void CallApiCallbackStub::Generate(MacroAssembler* masm) {
   STATIC_ASSERT(FCA::kReturnValueDefaultValueIndex == 2);
   STATIC_ASSERT(FCA::kIsolateIndex == 1);
   STATIC_ASSERT(FCA::kHolderIndex == 0);
-  STATIC_ASSERT(FCA::kArgsLength == 7);
+  STATIC_ASSERT(FCA::kNewTargetIndex == 7);
+  STATIC_ASSERT(FCA::kArgsLength == 8);
 
-  // FunctionCallbackArguments: context, callee and call data.
+  // FunctionCallbackArguments
+
+  // new target
+  __ PushRoot(Heap::kUndefinedValueRootIndex);
+
+  // context, callee and call data.
   __ Push(context, callee, call_data);
 
   if (!is_lazy()) {

deps/v8/src/builtins.cc

@@ -89,17 +89,6 @@ Handle<S> BuiltinArguments<BuiltinExtraArguments::kTarget>::target() {
   return Arguments::at<S>(Arguments::length() - 1);
 }
 
-template <>
-int BuiltinArguments<BuiltinExtraArguments::kNewTarget>::length() const {
-  return Arguments::length() - 1;
-}
-
-template <>
-Handle<HeapObject>
-BuiltinArguments<BuiltinExtraArguments::kNewTarget>::new_target() {
-  return Arguments::at<HeapObject>(Arguments::length() - 1);
-}
-
 template <>
 int BuiltinArguments<BuiltinExtraArguments::kTargetAndNewTarget>::length()
     const {
@@ -4247,11 +4236,13 @@ BUILTIN(RestrictedStrictArgumentsPropertiesThrower) {
 
 namespace {
 
-template <bool is_construct>
 MUST_USE_RESULT MaybeHandle<Object> HandleApiCallHelper(
-    Isolate* isolate, BuiltinArguments<BuiltinExtraArguments::kTarget> args) {
+    Isolate* isolate,
+    BuiltinArguments<BuiltinExtraArguments::kTargetAndNewTarget> args) {
   HandleScope scope(isolate);
   Handle<HeapObject> function = args.target<HeapObject>();
+  Handle<HeapObject> new_target = args.new_target();
+  bool is_construct = !new_target->IsUndefined();
   Handle<JSReceiver> receiver;
 
   DCHECK(function->IsFunctionTemplateInfo() ||
@@ -4311,13 +4302,9 @@ MUST_USE_RESULT MaybeHandle<Object> HandleApiCallHelper(
     LOG(isolate, ApiObjectAccess("call", JSObject::cast(*args.receiver())));
     DCHECK(raw_holder->IsJSObject());
 
-    FunctionCallbackArguments custom(isolate,
-                                     data_obj,
-                                     *function,
-                                     raw_holder,
-                                     &args[0] - 1,
-                                     args.length() - 1,
-                                     is_construct);
+    FunctionCallbackArguments custom(isolate, data_obj, *function, raw_holder,
+                                     *new_target, &args[0] - 1,
+                                     args.length() - 1);
 
     Handle<Object> result = custom.Call(callback);
     if (result.is_null()) result = isolate->factory()->undefined_value();
@@ -4338,19 +4325,11 @@ BUILTIN(HandleApiCall) {
   HandleScope scope(isolate);
   Handle<Object> result;
   ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result,
-                                     HandleApiCallHelper<false>(isolate, args));
+                                     HandleApiCallHelper(isolate, args));
   return *result;
 }
 
 
-BUILTIN(HandleApiCallConstruct) {
-  HandleScope scope(isolate);
-  Handle<Object> result;
-  ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result,
-                                     HandleApiCallHelper<true>(isolate, args));
-  return *result;
-}
-
 Handle<Code> Builtins::CallFunction(ConvertReceiverMode mode,
                                     TailCallMode tail_call_mode) {
   switch (tail_call_mode) {
@@ -4432,11 +4411,12 @@ Handle<Code> Builtins::InterpreterPushArgsAndCall(TailCallMode tail_call_mode) {
 namespace {
 
 class RelocatableArguments
-    : public BuiltinArguments<BuiltinExtraArguments::kTarget>,
+    : public BuiltinArguments<BuiltinExtraArguments::kTargetAndNewTarget>,
       public Relocatable {
  public:
   RelocatableArguments(Isolate* isolate, int length, Object** arguments)
-      : BuiltinArguments<BuiltinExtraArguments::kTarget>(length, arguments),
+      : BuiltinArguments<BuiltinExtraArguments::kTargetAndNewTarget>(length,
+                                                                     arguments),
         Relocatable(isolate) {}
 
   virtual inline void IterateInstance(ObjectVisitor* v) {
@@ -4468,24 +4448,26 @@ MaybeHandle<Object> Builtins::InvokeApiFunction(Handle<HeapObject> function,
       }
     }
   }
-  // Construct BuiltinArguments object: function, arguments reversed, receiver.
+  // Construct BuiltinArguments object:
+  // new target, function, arguments reversed, receiver.
   const int kBufferSize = 32;
   Object* small_argv[kBufferSize];
   Object** argv;
-  if (argc + 2 <= kBufferSize) {
+  if (argc + 3 <= kBufferSize) {
     argv = small_argv;
   } else {
-    argv = new Object* [argc + 2];
+    argv = new Object*[argc + 3];
   }
-  argv[argc + 1] = *receiver;
+  argv[argc + 2] = *receiver;
   for (int i = 0; i < argc; ++i) {
-    argv[argc - i] = *args[i];
+    argv[argc - i + 1] = *args[i];
   }
-  argv[0] = *function;
+  argv[1] = *function;
+  argv[0] = isolate->heap()->undefined_value();  // new target
   MaybeHandle<Object> result;
   {
-    RelocatableArguments arguments(isolate, argc + 2, &argv[argc + 1]);
-    result = HandleApiCallHelper<false>(isolate, arguments);
+    RelocatableArguments arguments(isolate, argc + 3, &argv[argc] + 2);
+    result = HandleApiCallHelper(isolate, arguments);
   }
   if (argv != small_argv) {
     delete[] argv;
@@ -4505,6 +4487,18 @@ MUST_USE_RESULT static Object* HandleApiCallAsFunctionOrConstructor(
   // Get the object called.
   JSObject* obj = JSObject::cast(*receiver);
 
+  // Set the new target.
+  HeapObject* new_target;
+  if (is_construct_call) {
+    // TODO(adamk): This should be passed through in args instead of
+    // being patched in here. We need to set a non-undefined value
+    // for v8::FunctionCallbackInfo::IsConstructCall() to get the
+    // right answer.
+    new_target = obj;
+  } else {
+    new_target = isolate->heap()->undefined_value();
+  }
+
   // Get the invocation callback from the function descriptor that was
   // used to create the called object.
   DCHECK(obj->map()->is_callable());
@@ -4527,13 +4521,9 @@ MUST_USE_RESULT static Object* HandleApiCallAsFunctionOrConstructor(
     HandleScope scope(isolate);
     LOG(isolate, ApiObjectAccess("call non-function", obj));
 
-    FunctionCallbackArguments custom(isolate,
-                                     call_data->data(),
-                                     constructor,
-                                     obj,
-                                     &args[0] - 1,
-                                     args.length() - 1,
-                                     is_construct_call);
+    FunctionCallbackArguments custom(isolate, call_data->data(), constructor,
+                                     obj, new_target, &args[0] - 1,
+                                     args.length() - 1);
     Handle<Object> result_handle = custom.Call(callback);
     if (result_handle.is_null()) {
       result = isolate->heap()->undefined_value();

deps/v8/src/builtins.h

@@ -166,8 +166,7 @@ inline bool operator&(BuiltinExtraArguments lhs, BuiltinExtraArguments rhs) {
   V(SymbolConstructor, kNone)                                  \
   V(SymbolConstructor_ConstructStub, kTarget)                  \
                                                                \
-  V(HandleApiCall, kTarget)                                    \
-  V(HandleApiCallConstruct, kTarget)                           \
+  V(HandleApiCall, kTargetAndNewTarget)                        \
   V(HandleApiCallAsFunction, kNone)                            \
   V(HandleApiCallAsConstructor, kNone)                         \
                                                                \

deps/v8/src/ia32/builtins-ia32.cc

@@ -186,16 +186,9 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
     __ j(greater_equal, &loop);
 
     // Call the function.
-    if (is_api_function) {
-      __ mov(esi, FieldOperand(edi, JSFunction::kContextOffset));
-      Handle<Code> code =
-          masm->isolate()->builtins()->HandleApiCallConstruct();
-      __ call(code, RelocInfo::CODE_TARGET);
-    } else {
-      ParameterCount actual(eax);
-      __ InvokeFunction(edi, edx, actual, CALL_FUNCTION,
-                        CheckDebugStepCallWrapper());
-    }
+    ParameterCount actual(eax);
+    __ InvokeFunction(edi, edx, actual, CALL_FUNCTION,
+                      CheckDebugStepCallWrapper());
 
     // Store offset of return address for deoptimizer.
     if (create_implicit_receiver && !is_api_function) {

deps/v8/src/ia32/code-stubs-ia32.cc

@@ -5686,9 +5686,14 @@ void CallApiCallbackStub::Generate(MacroAssembler* masm) {
   STATIC_ASSERT(FCA::kReturnValueDefaultValueIndex == 2);
   STATIC_ASSERT(FCA::kIsolateIndex == 1);
   STATIC_ASSERT(FCA::kHolderIndex == 0);
-  STATIC_ASSERT(FCA::kArgsLength == 7);
+  STATIC_ASSERT(FCA::kNewTargetIndex == 7);
+  STATIC_ASSERT(FCA::kArgsLength == 8);
 
   __ pop(return_address);
+
+  // new target
+  __ PushRoot(Heap::kUndefinedValueRootIndex);
+
   // context save.
   __ push(context);