| // Copyright 2012 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #if V8_TARGET_ARCH_X87 |
| |
| #include "src/ic/handler-compiler.h" |
| |
| #include "src/api-arguments.h" |
| #include "src/field-type.h" |
| #include "src/ic/call-optimization.h" |
| #include "src/ic/ic.h" |
| #include "src/isolate-inl.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| #define __ ACCESS_MASM(masm) |
| |
| |
| void NamedLoadHandlerCompiler::GenerateLoadViaGetter( |
| MacroAssembler* masm, Handle<Map> map, Register receiver, Register holder, |
| int accessor_index, int expected_arguments, Register scratch) { |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| |
| // Save context register |
| __ push(esi); |
| |
| if (accessor_index >= 0) { |
| DCHECK(!holder.is(scratch)); |
| DCHECK(!receiver.is(scratch)); |
| // Call the JavaScript getter with the receiver on the stack. |
| if (map->IsJSGlobalObjectMap()) { |
| // Swap in the global receiver. |
| __ mov(scratch, |
| FieldOperand(receiver, JSGlobalObject::kGlobalProxyOffset)); |
| receiver = scratch; |
| } |
| __ push(receiver); |
| __ LoadAccessor(edi, holder, accessor_index, ACCESSOR_GETTER); |
| __ Set(eax, 0); |
| __ Call(masm->isolate()->builtins()->CallFunction( |
| ConvertReceiverMode::kNotNullOrUndefined), |
| RelocInfo::CODE_TARGET); |
| } else { |
| // If we generate a global code snippet for deoptimization only, remember |
| // the place to continue after deoptimization. |
| masm->isolate()->heap()->SetGetterStubDeoptPCOffset(masm->pc_offset()); |
| } |
| |
| // Restore context register. |
| __ pop(esi); |
| } |
| __ ret(0); |
| } |
| |
| |
| void PropertyHandlerCompiler::PushVectorAndSlot(Register vector, |
| Register slot) { |
| MacroAssembler* masm = this->masm(); |
| __ push(vector); |
| __ push(slot); |
| } |
| |
| |
| void PropertyHandlerCompiler::PopVectorAndSlot(Register vector, Register slot) { |
| MacroAssembler* masm = this->masm(); |
| __ pop(slot); |
| __ pop(vector); |
| } |
| |
| |
| void PropertyHandlerCompiler::DiscardVectorAndSlot() { |
| MacroAssembler* masm = this->masm(); |
| // Remove vector and slot. |
| __ add(esp, Immediate(2 * kPointerSize)); |
| } |
| |
| |
| void PropertyHandlerCompiler::GenerateDictionaryNegativeLookup( |
| MacroAssembler* masm, Label* miss_label, Register receiver, |
| Handle<Name> name, Register scratch0, Register scratch1) { |
| DCHECK(name->IsUniqueName()); |
| DCHECK(!receiver.is(scratch0)); |
| Counters* counters = masm->isolate()->counters(); |
| __ IncrementCounter(counters->negative_lookups(), 1); |
| __ IncrementCounter(counters->negative_lookups_miss(), 1); |
| |
| __ mov(scratch0, FieldOperand(receiver, HeapObject::kMapOffset)); |
| |
| const int kInterceptorOrAccessCheckNeededMask = |
| (1 << Map::kHasNamedInterceptor) | (1 << Map::kIsAccessCheckNeeded); |
| |
| // Bail out if the receiver has a named interceptor or requires access checks. |
| __ test_b(FieldOperand(scratch0, Map::kBitFieldOffset), |
| Immediate(kInterceptorOrAccessCheckNeededMask)); |
| __ j(not_zero, miss_label); |
| |
| // Check that receiver is a JSObject. |
| __ CmpInstanceType(scratch0, FIRST_JS_RECEIVER_TYPE); |
| __ j(below, miss_label); |
| |
| // Load properties array. |
| Register properties = scratch0; |
| __ mov(properties, FieldOperand(receiver, JSObject::kPropertiesOffset)); |
| |
| // Check that the properties array is a dictionary. |
| __ cmp(FieldOperand(properties, HeapObject::kMapOffset), |
| Immediate(masm->isolate()->factory()->hash_table_map())); |
| __ j(not_equal, miss_label); |
| |
| Label done; |
| NameDictionaryLookupStub::GenerateNegativeLookup(masm, miss_label, &done, |
| properties, name, scratch1); |
| __ bind(&done); |
| __ DecrementCounter(counters->negative_lookups_miss(), 1); |
| } |
| |
| |
| void NamedLoadHandlerCompiler::GenerateDirectLoadGlobalFunctionPrototype( |
| MacroAssembler* masm, int index, Register result, Label* miss) { |
| __ LoadGlobalFunction(index, result); |
| // Load its initial map. The global functions all have initial maps. |
| __ mov(result, |
| FieldOperand(result, JSFunction::kPrototypeOrInitialMapOffset)); |
| // Load the prototype from the initial map. |
| __ mov(result, FieldOperand(result, Map::kPrototypeOffset)); |
| } |
| |
| |
| void NamedLoadHandlerCompiler::GenerateLoadFunctionPrototype( |
| MacroAssembler* masm, Register receiver, Register scratch1, |
| Register scratch2, Label* miss_label) { |
| // TODO(mvstanton): This isn't used on ia32. Move all the other |
| // platform implementations into a code stub so this method can be removed. |
| UNREACHABLE(); |
| } |
| |
| |
| // Generate call to api function. |
| // This function uses push() to generate smaller, faster code than |
| // the version above. It is an optimization that should will be removed |
| // when api call ICs are generated in hydrogen. |
| void PropertyHandlerCompiler::GenerateApiAccessorCall( |
| MacroAssembler* masm, const CallOptimization& optimization, |
| Handle<Map> receiver_map, Register receiver, Register scratch, |
| bool is_store, Register store_parameter, Register accessor_holder, |
| int accessor_index) { |
| DCHECK(!accessor_holder.is(scratch)); |
| // Copy return value. |
| __ pop(scratch); |
| // receiver |
| __ push(receiver); |
| // Write the arguments to stack frame. |
| if (is_store) { |
| DCHECK(!receiver.is(store_parameter)); |
| DCHECK(!scratch.is(store_parameter)); |
| __ push(store_parameter); |
| } |
| __ push(scratch); |
| // Stack now matches JSFunction abi. |
| DCHECK(optimization.is_simple_api_call()); |
| |
| // Abi for CallApiCallbackStub. |
| Register callee = edi; |
| Register data = ebx; |
| Register holder = ecx; |
| Register api_function_address = edx; |
| scratch = no_reg; |
| |
| // Put callee in place. |
| __ LoadAccessor(callee, accessor_holder, accessor_index, |
| is_store ? ACCESSOR_SETTER : ACCESSOR_GETTER); |
| |
| // Put holder in place. |
| CallOptimization::HolderLookup holder_lookup; |
| int holder_depth = 0; |
| optimization.LookupHolderOfExpectedType(receiver_map, &holder_lookup, |
| &holder_depth); |
| switch (holder_lookup) { |
| case CallOptimization::kHolderIsReceiver: |
| __ Move(holder, receiver); |
| break; |
| case CallOptimization::kHolderFound: |
| __ mov(holder, FieldOperand(receiver, HeapObject::kMapOffset)); |
| __ mov(holder, FieldOperand(holder, Map::kPrototypeOffset)); |
| for (int i = 1; i < holder_depth; i++) { |
| __ mov(holder, FieldOperand(holder, HeapObject::kMapOffset)); |
| __ mov(holder, FieldOperand(holder, Map::kPrototypeOffset)); |
| } |
| break; |
| case CallOptimization::kHolderNotFound: |
| UNREACHABLE(); |
| break; |
| } |
| |
| Isolate* isolate = masm->isolate(); |
| Handle<CallHandlerInfo> api_call_info = optimization.api_call_info(); |
| bool call_data_undefined = false; |
| // Put call data in place. |
| if (api_call_info->data()->IsUndefined()) { |
| call_data_undefined = true; |
| __ mov(data, Immediate(isolate->factory()->undefined_value())); |
| } else { |
| if (optimization.is_constant_call()) { |
| __ mov(data, FieldOperand(callee, JSFunction::kSharedFunctionInfoOffset)); |
| __ mov(data, FieldOperand(data, SharedFunctionInfo::kFunctionDataOffset)); |
| __ mov(data, FieldOperand(data, FunctionTemplateInfo::kCallCodeOffset)); |
| } else { |
| __ mov(data, FieldOperand(callee, FunctionTemplateInfo::kCallCodeOffset)); |
| } |
| __ mov(data, FieldOperand(data, CallHandlerInfo::kDataOffset)); |
| } |
| |
| if (api_call_info->fast_handler()->IsCode()) { |
| // Just tail call into the code. |
| __ Jump(handle(Code::cast(api_call_info->fast_handler())), |
| RelocInfo::CODE_TARGET); |
| return; |
| } |
| // Put api_function_address in place. |
| Address function_address = v8::ToCData<Address>(api_call_info->callback()); |
| __ mov(api_function_address, Immediate(function_address)); |
| |
| // Jump to stub. |
| CallApiCallbackStub stub(isolate, is_store, call_data_undefined, |
| !optimization.is_constant_call()); |
| __ TailCallStub(&stub); |
| } |
| |
| |
| // Generate code to check that a global property cell is empty. Create |
| // the property cell at compilation time if no cell exists for the |
| // property. |
| void PropertyHandlerCompiler::GenerateCheckPropertyCell( |
| MacroAssembler* masm, Handle<JSGlobalObject> global, Handle<Name> name, |
| Register scratch, Label* miss) { |
| Handle<PropertyCell> cell = JSGlobalObject::EnsurePropertyCell(global, name); |
| DCHECK(cell->value()->IsTheHole()); |
| Factory* factory = masm->isolate()->factory(); |
| Handle<WeakCell> weak_cell = factory->NewWeakCell(cell); |
| __ LoadWeakValue(scratch, weak_cell, miss); |
| __ cmp(FieldOperand(scratch, PropertyCell::kValueOffset), |
| Immediate(factory->the_hole_value())); |
| __ j(not_equal, miss); |
| } |
| |
| |
| void NamedStoreHandlerCompiler::GenerateStoreViaSetter( |
| MacroAssembler* masm, Handle<Map> map, Register receiver, Register holder, |
| int accessor_index, int expected_arguments, Register scratch) { |
| // ----------- S t a t e ------------- |
| // -- esp[0] : return address |
| // ----------------------------------- |
| { |
| FrameScope scope(masm, StackFrame::INTERNAL); |
| |
| // Save context register |
| __ push(esi); |
| // Save value register, so we can restore it later. |
| __ push(value()); |
| |
| if (accessor_index >= 0) { |
| DCHECK(!holder.is(scratch)); |
| DCHECK(!receiver.is(scratch)); |
| DCHECK(!value().is(scratch)); |
| // Call the JavaScript setter with receiver and value on the stack. |
| if (map->IsJSGlobalObjectMap()) { |
| __ mov(scratch, |
| FieldOperand(receiver, JSGlobalObject::kGlobalProxyOffset)); |
| receiver = scratch; |
| } |
| __ push(receiver); |
| __ push(value()); |
| __ LoadAccessor(edi, holder, accessor_index, ACCESSOR_SETTER); |
| __ Set(eax, 1); |
| __ Call(masm->isolate()->builtins()->CallFunction( |
| ConvertReceiverMode::kNotNullOrUndefined), |
| RelocInfo::CODE_TARGET); |
| } else { |
| // If we generate a global code snippet for deoptimization only, remember |
| // the place to continue after deoptimization. |
| masm->isolate()->heap()->SetSetterStubDeoptPCOffset(masm->pc_offset()); |
| } |
| |
| // We have to return the passed value, not the return value of the setter. |
| __ pop(eax); |
| // Restore context register. |
| __ pop(esi); |
| } |
| __ ret(0); |
| } |
| |
| |
| static void PushInterceptorArguments(MacroAssembler* masm, Register receiver, |
| Register holder, Register name, |
| Handle<JSObject> holder_obj) { |
| STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsNameIndex == 0); |
| STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsThisIndex == 1); |
| STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsHolderIndex == 2); |
| STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsLength == 3); |
| __ push(name); |
| __ push(receiver); |
| __ push(holder); |
| } |
| |
| |
| static void CompileCallLoadPropertyWithInterceptor( |
| MacroAssembler* masm, Register receiver, Register holder, Register name, |
| Handle<JSObject> holder_obj, Runtime::FunctionId id) { |
| DCHECK(NamedLoadHandlerCompiler::kInterceptorArgsLength == |
| Runtime::FunctionForId(id)->nargs); |
| PushInterceptorArguments(masm, receiver, holder, name, holder_obj); |
| __ CallRuntime(id); |
| } |
| |
| |
| static void StoreIC_PushArgs(MacroAssembler* masm) { |
| Register receiver = StoreDescriptor::ReceiverRegister(); |
| Register name = StoreDescriptor::NameRegister(); |
| Register value = StoreDescriptor::ValueRegister(); |
| Register slot = VectorStoreICDescriptor::SlotRegister(); |
| Register vector = VectorStoreICDescriptor::VectorRegister(); |
| |
| __ xchg(receiver, Operand(esp, 0)); |
| __ push(name); |
| __ push(value); |
| __ push(slot); |
| __ push(vector); |
| __ push(receiver); // which contains the return address. |
| } |
| |
| |
| void NamedStoreHandlerCompiler::GenerateSlow(MacroAssembler* masm) { |
| // Return address is on the stack. |
| StoreIC_PushArgs(masm); |
| |
| // Do tail-call to runtime routine. |
| __ TailCallRuntime(Runtime::kStoreIC_Slow); |
| } |
| |
| |
| void ElementHandlerCompiler::GenerateStoreSlow(MacroAssembler* masm) { |
| // Return address is on the stack. |
| StoreIC_PushArgs(masm); |
| |
| // Do tail-call to runtime routine. |
| __ TailCallRuntime(Runtime::kKeyedStoreIC_Slow); |
| } |
| |
| |
| #undef __ |
| #define __ ACCESS_MASM(masm()) |
| |
| |
| void NamedStoreHandlerCompiler::GenerateRestoreName(Label* label, |
| Handle<Name> name) { |
| if (!label->is_unused()) { |
| __ bind(label); |
| __ mov(this->name(), Immediate(name)); |
| } |
| } |
| |
| |
| void NamedStoreHandlerCompiler::GenerateRestoreName(Handle<Name> name) { |
| __ mov(this->name(), Immediate(name)); |
| } |
| |
| |
| void NamedStoreHandlerCompiler::RearrangeVectorAndSlot( |
| Register current_map, Register destination_map) { |
| DCHECK(destination_map.is(StoreTransitionHelper::MapRegister())); |
| DCHECK(current_map.is(StoreTransitionHelper::VectorRegister())); |
| ExternalReference virtual_slot = |
| ExternalReference::virtual_slot_register(isolate()); |
| __ mov(destination_map, current_map); |
| __ pop(current_map); |
| __ mov(Operand::StaticVariable(virtual_slot), current_map); |
| __ pop(current_map); // put vector in place. |
| } |
| |
| |
| void NamedStoreHandlerCompiler::GenerateRestoreMap(Handle<Map> transition, |
| Register map_reg, |
| Register scratch, |
| Label* miss) { |
| Handle<WeakCell> cell = Map::WeakCellForMap(transition); |
| DCHECK(!map_reg.is(scratch)); |
| __ LoadWeakValue(map_reg, cell, miss); |
| if (transition->CanBeDeprecated()) { |
| __ mov(scratch, FieldOperand(map_reg, Map::kBitField3Offset)); |
| __ and_(scratch, Immediate(Map::Deprecated::kMask)); |
| __ j(not_zero, miss); |
| } |
| } |
| |
| |
| void NamedStoreHandlerCompiler::GenerateConstantCheck(Register map_reg, |
| int descriptor, |
| Register value_reg, |
| Register scratch, |
| Label* miss_label) { |
| DCHECK(!map_reg.is(scratch)); |
| DCHECK(!map_reg.is(value_reg)); |
| DCHECK(!value_reg.is(scratch)); |
| __ LoadInstanceDescriptors(map_reg, scratch); |
| __ mov(scratch, |
| FieldOperand(scratch, DescriptorArray::GetValueOffset(descriptor))); |
| __ cmp(value_reg, scratch); |
| __ j(not_equal, miss_label); |
| } |
| |
| void NamedStoreHandlerCompiler::GenerateFieldTypeChecks(FieldType* field_type, |
| Register value_reg, |
| Label* miss_label) { |
| Register map_reg = scratch1(); |
| Register scratch = scratch2(); |
| DCHECK(!value_reg.is(map_reg)); |
| DCHECK(!value_reg.is(scratch)); |
| __ JumpIfSmi(value_reg, miss_label); |
| if (field_type->IsClass()) { |
| __ mov(map_reg, FieldOperand(value_reg, HeapObject::kMapOffset)); |
| __ CmpWeakValue(map_reg, Map::WeakCellForMap(field_type->AsClass()), |
| scratch); |
| __ j(not_equal, miss_label); |
| } |
| } |
| |
| |
| Register PropertyHandlerCompiler::CheckPrototypes( |
| Register object_reg, Register holder_reg, Register scratch1, |
| Register scratch2, Handle<Name> name, Label* miss, PrototypeCheckType check, |
| ReturnHolder return_what) { |
| Handle<Map> receiver_map = map(); |
| |
| // Make sure there's no overlap between holder and object registers. |
| DCHECK(!scratch1.is(object_reg) && !scratch1.is(holder_reg)); |
| DCHECK(!scratch2.is(object_reg) && !scratch2.is(holder_reg) && |
| !scratch2.is(scratch1)); |
| |
| if (FLAG_eliminate_prototype_chain_checks) { |
| Handle<Cell> validity_cell = |
| Map::GetOrCreatePrototypeChainValidityCell(receiver_map, isolate()); |
| if (!validity_cell.is_null()) { |
| DCHECK_EQ(Smi::FromInt(Map::kPrototypeChainValid), |
| validity_cell->value()); |
| // Operand::ForCell(...) points to the cell's payload! |
| __ cmp(Operand::ForCell(validity_cell), |
| Immediate(Smi::FromInt(Map::kPrototypeChainValid))); |
| __ j(not_equal, miss); |
| } |
| |
| // The prototype chain of primitives (and their JSValue wrappers) depends |
| // on the native context, which can't be guarded by validity cells. |
| // |object_reg| holds the native context specific prototype in this case; |
| // we need to check its map. |
| if (check == CHECK_ALL_MAPS) { |
| __ mov(scratch1, FieldOperand(object_reg, HeapObject::kMapOffset)); |
| Handle<WeakCell> cell = Map::WeakCellForMap(receiver_map); |
| __ CmpWeakValue(scratch1, cell, scratch2); |
| __ j(not_equal, miss); |
| } |
| } |
| |
| // Keep track of the current object in register reg. |
| Register reg = object_reg; |
| int depth = 0; |
| |
| Handle<JSObject> current = Handle<JSObject>::null(); |
| if (receiver_map->IsJSGlobalObjectMap()) { |
| current = isolate()->global_object(); |
| } |
| |
| // Check access rights to the global object. This has to happen after |
| // the map check so that we know that the object is actually a global |
| // object. |
| // This allows us to install generated handlers for accesses to the |
| // global proxy (as opposed to using slow ICs). See corresponding code |
| // in LookupForRead(). |
| if (receiver_map->IsJSGlobalProxyMap()) { |
| __ CheckAccessGlobalProxy(reg, scratch1, scratch2, miss); |
| } |
| |
| Handle<JSObject> prototype = Handle<JSObject>::null(); |
| Handle<Map> current_map = receiver_map; |
| Handle<Map> holder_map(holder()->map()); |
| // Traverse the prototype chain and check the maps in the prototype chain for |
| // fast and global objects or do negative lookup for normal objects. |
| while (!current_map.is_identical_to(holder_map)) { |
| ++depth; |
| |
| // Only global objects and objects that do not require access |
| // checks are allowed in stubs. |
| DCHECK(current_map->IsJSGlobalProxyMap() || |
| !current_map->is_access_check_needed()); |
| |
| prototype = handle(JSObject::cast(current_map->prototype())); |
| if (current_map->is_dictionary_map() && |
| !current_map->IsJSGlobalObjectMap()) { |
| DCHECK(!current_map->IsJSGlobalProxyMap()); // Proxy maps are fast. |
| if (!name->IsUniqueName()) { |
| DCHECK(name->IsString()); |
| name = factory()->InternalizeString(Handle<String>::cast(name)); |
| } |
| DCHECK(current.is_null() || |
| current->property_dictionary()->FindEntry(name) == |
| NameDictionary::kNotFound); |
| |
| if (FLAG_eliminate_prototype_chain_checks && depth > 1) { |
| // TODO(jkummerow): Cache and re-use weak cell. |
| __ LoadWeakValue(reg, isolate()->factory()->NewWeakCell(current), miss); |
| } |
| GenerateDictionaryNegativeLookup(masm(), miss, reg, name, scratch1, |
| scratch2); |
| |
| if (!FLAG_eliminate_prototype_chain_checks) { |
| __ mov(scratch1, FieldOperand(reg, HeapObject::kMapOffset)); |
| __ mov(holder_reg, FieldOperand(scratch1, Map::kPrototypeOffset)); |
| } |
| } else { |
| Register map_reg = scratch1; |
| if (!FLAG_eliminate_prototype_chain_checks) { |
| __ mov(map_reg, FieldOperand(reg, HeapObject::kMapOffset)); |
| } |
| if (current_map->IsJSGlobalObjectMap()) { |
| GenerateCheckPropertyCell(masm(), Handle<JSGlobalObject>::cast(current), |
| name, scratch2, miss); |
| } else if (!FLAG_eliminate_prototype_chain_checks && |
| (depth != 1 || check == CHECK_ALL_MAPS)) { |
| Handle<WeakCell> cell = Map::WeakCellForMap(current_map); |
| __ CmpWeakValue(map_reg, cell, scratch2); |
| __ j(not_equal, miss); |
| } |
| if (!FLAG_eliminate_prototype_chain_checks) { |
| __ mov(holder_reg, FieldOperand(map_reg, Map::kPrototypeOffset)); |
| } |
| } |
| |
| reg = holder_reg; // From now on the object will be in holder_reg. |
| // Go to the next object in the prototype chain. |
| current = prototype; |
| current_map = handle(current->map()); |
| } |
| |
| DCHECK(!current_map->IsJSGlobalProxyMap()); |
| |
| // Log the check depth. |
| LOG(isolate(), IntEvent("check-maps-depth", depth + 1)); |
| |
| if (!FLAG_eliminate_prototype_chain_checks && |
| (depth != 0 || check == CHECK_ALL_MAPS)) { |
| // Check the holder map. |
| __ mov(scratch1, FieldOperand(reg, HeapObject::kMapOffset)); |
| Handle<WeakCell> cell = Map::WeakCellForMap(current_map); |
| __ CmpWeakValue(scratch1, cell, scratch2); |
| __ j(not_equal, miss); |
| } |
| |
| bool return_holder = return_what == RETURN_HOLDER; |
| if (FLAG_eliminate_prototype_chain_checks && return_holder && depth != 0) { |
| __ LoadWeakValue(reg, isolate()->factory()->NewWeakCell(current), miss); |
| } |
| |
| // Return the register containing the holder. |
| return return_holder ? reg : no_reg; |
| } |
| |
| |
| void NamedLoadHandlerCompiler::FrontendFooter(Handle<Name> name, Label* miss) { |
| if (!miss->is_unused()) { |
| Label success; |
| __ jmp(&success); |
| __ bind(miss); |
| if (IC::ICUseVector(kind())) { |
| DCHECK(kind() == Code::LOAD_IC); |
| PopVectorAndSlot(); |
| } |
| TailCallBuiltin(masm(), MissBuiltin(kind())); |
| __ bind(&success); |
| } |
| } |
| |
| |
| void NamedStoreHandlerCompiler::FrontendFooter(Handle<Name> name, Label* miss) { |
| if (!miss->is_unused()) { |
| Label success; |
| __ jmp(&success); |
| GenerateRestoreName(miss, name); |
| if (IC::ICUseVector(kind())) PopVectorAndSlot(); |
| TailCallBuiltin(masm(), MissBuiltin(kind())); |
| __ bind(&success); |
| } |
| } |
| |
| |
| void NamedLoadHandlerCompiler::GenerateLoadConstant(Handle<Object> value) { |
| // Return the constant value. |
| __ LoadObject(eax, value); |
| __ ret(0); |
| } |
| |
| |
| void NamedLoadHandlerCompiler::GenerateLoadInterceptorWithFollowup( |
| LookupIterator* it, Register holder_reg) { |
| DCHECK(holder()->HasNamedInterceptor()); |
| DCHECK(!holder()->GetNamedInterceptor()->getter()->IsUndefined()); |
| |
| // Compile the interceptor call, followed by inline code to load the |
| // property from further up the prototype chain if the call fails. |
| // Check that the maps haven't changed. |
| DCHECK(holder_reg.is(receiver()) || holder_reg.is(scratch1())); |
| |
| // Preserve the receiver register explicitly whenever it is different from the |
| // holder and it is needed should the interceptor return without any result. |
| // The ACCESSOR case needs the receiver to be passed into C++ code, the FIELD |
| // case might cause a miss during the prototype check. |
| bool must_perform_prototype_check = |
| !holder().is_identical_to(it->GetHolder<JSObject>()); |
| bool must_preserve_receiver_reg = |
| !receiver().is(holder_reg) && |
| (it->state() == LookupIterator::ACCESSOR || must_perform_prototype_check); |
| |
| // Save necessary data before invoking an interceptor. |
| // Requires a frame to make GC aware of pushed pointers. |
| { |
| FrameScope frame_scope(masm(), StackFrame::INTERNAL); |
| |
| if (must_preserve_receiver_reg) { |
| __ push(receiver()); |
| } |
| __ push(holder_reg); |
| __ push(this->name()); |
| InterceptorVectorSlotPush(holder_reg); |
| // Invoke an interceptor. Note: map checks from receiver to |
| // interceptor's holder has been compiled before (see a caller |
| // of this method.) |
| CompileCallLoadPropertyWithInterceptor( |
| masm(), receiver(), holder_reg, this->name(), holder(), |
| Runtime::kLoadPropertyWithInterceptorOnly); |
| |
| // Check if interceptor provided a value for property. If it's |
| // the case, return immediately. |
| Label interceptor_failed; |
| __ cmp(eax, factory()->no_interceptor_result_sentinel()); |
| __ j(equal, &interceptor_failed); |
| frame_scope.GenerateLeaveFrame(); |
| __ ret(0); |
| |
| // Clobber registers when generating debug-code to provoke errors. |
| __ bind(&interceptor_failed); |
| if (FLAG_debug_code) { |
| __ mov(receiver(), Immediate(bit_cast<int32_t>(kZapValue))); |
| __ mov(holder_reg, Immediate(bit_cast<int32_t>(kZapValue))); |
| __ mov(this->name(), Immediate(bit_cast<int32_t>(kZapValue))); |
| } |
| |
| InterceptorVectorSlotPop(holder_reg); |
| __ pop(this->name()); |
| __ pop(holder_reg); |
| if (must_preserve_receiver_reg) { |
| __ pop(receiver()); |
| } |
| |
| // Leave the internal frame. |
| } |
| |
| GenerateLoadPostInterceptor(it, holder_reg); |
| } |
| |
| |
| void NamedLoadHandlerCompiler::GenerateLoadInterceptor(Register holder_reg) { |
| DCHECK(holder()->HasNamedInterceptor()); |
| DCHECK(!holder()->GetNamedInterceptor()->getter()->IsUndefined()); |
| // Call the runtime system to load the interceptor. |
| __ pop(scratch2()); // save old return address |
| PushInterceptorArguments(masm(), receiver(), holder_reg, this->name(), |
| holder()); |
| __ push(scratch2()); // restore old return address |
| |
| __ TailCallRuntime(Runtime::kLoadPropertyWithInterceptor); |
| } |
| |
| |
| Handle<Code> NamedStoreHandlerCompiler::CompileStoreCallback( |
| Handle<JSObject> object, Handle<Name> name, Handle<AccessorInfo> callback, |
| LanguageMode language_mode) { |
| Register holder_reg = Frontend(name); |
| |
| __ pop(scratch1()); // remove the return address |
| __ push(receiver()); |
| __ push(holder_reg); |
| // If the callback cannot leak, then push the callback directly, |
| // otherwise wrap it in a weak cell. |
| if (callback->data()->IsUndefined() || callback->data()->IsSmi()) { |
| __ Push(callback); |
| } else { |
| Handle<WeakCell> cell = isolate()->factory()->NewWeakCell(callback); |
| __ Push(cell); |
| } |
| __ Push(name); |
| __ push(value()); |
| __ push(Immediate(Smi::FromInt(language_mode))); |
| __ push(scratch1()); // restore return address |
| |
| // Do tail-call to the runtime system. |
| __ TailCallRuntime(Runtime::kStoreCallbackProperty); |
| |
| // Return the generated code. |
| return GetCode(kind(), name); |
| } |
| |
| |
| Register NamedStoreHandlerCompiler::value() { |
| return StoreDescriptor::ValueRegister(); |
| } |
| |
| |
| Handle<Code> NamedLoadHandlerCompiler::CompileLoadGlobal( |
| Handle<PropertyCell> cell, Handle<Name> name, bool is_configurable) { |
| Label miss; |
| if (IC::ICUseVector(kind())) { |
| PushVectorAndSlot(); |
| } |
| FrontendHeader(receiver(), name, &miss, DONT_RETURN_ANYTHING); |
| // Get the value from the cell. |
| Register result = StoreDescriptor::ValueRegister(); |
| Handle<WeakCell> weak_cell = factory()->NewWeakCell(cell); |
| __ LoadWeakValue(result, weak_cell, &miss); |
| __ mov(result, FieldOperand(result, PropertyCell::kValueOffset)); |
| |
| // Check for deleted property if property can actually be deleted. |
| if (is_configurable) { |
| __ cmp(result, factory()->the_hole_value()); |
| __ j(equal, &miss); |
| } else if (FLAG_debug_code) { |
| __ cmp(result, factory()->the_hole_value()); |
| __ Check(not_equal, kDontDeleteCellsCannotContainTheHole); |
| } |
| |
| Counters* counters = isolate()->counters(); |
| __ IncrementCounter(counters->ic_named_load_global_stub(), 1); |
| // The code above already loads the result into the return register. |
| if (IC::ICUseVector(kind())) { |
| DiscardVectorAndSlot(); |
| } |
| __ ret(0); |
| |
| FrontendFooter(name, &miss); |
| |
| // Return the generated code. |
| return GetCode(kind(), name); |
| } |
| |
| |
| #undef __ |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_TARGET_ARCH_X87 |