// 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. #include "src/codegen/interface-descriptors.h" #include "src/codegen/macro-assembler.h" namespace v8 { namespace internal { void CallInterfaceDescriptorData::InitializePlatformSpecific( int register_parameter_count, const Register* registers) { DCHECK(!IsInitializedPlatformIndependent()); register_param_count_ = register_parameter_count; // UBSan doesn't like creating zero-length arrays. if (register_parameter_count == 0) return; // InterfaceDescriptor owns a copy of the registers array. register_params_ = NewArray<Register>(register_parameter_count, no_reg); for (int i = 0; i < register_parameter_count; i++) { // The value of the root register must be reserved, thus any uses // within the calling convention are disallowed. DCHECK_NE(registers[i], kRootRegister); register_params_[i] = registers[i]; } } void CallInterfaceDescriptorData::InitializePlatformIndependent( Flags flags, int return_count, int parameter_count, const MachineType* machine_types, int machine_types_length, StackArgumentOrder stack_order) { DCHECK(IsInitializedPlatformSpecific()); flags_ = flags; stack_order_ = stack_order; return_count_ = return_count; param_count_ = parameter_count; const int types_length = return_count_ + param_count_; // Machine types are either fully initialized or null. if (machine_types == nullptr) { machine_types_ = NewArray<MachineType>(types_length, MachineType::AnyTagged()); } else { DCHECK_EQ(machine_types_length, types_length); machine_types_ = NewArray<MachineType>(types_length); for (int i = 0; i < types_length; i++) machine_types_[i] = machine_types[i]; } if (!(flags_ & kNoStackScan)) DCHECK(AllStackParametersAreTagged()); } #ifdef DEBUG bool CallInterfaceDescriptorData::AllStackParametersAreTagged() const { DCHECK(IsInitialized()); const int types_length = return_count_ + param_count_; const int first_stack_param = return_count_ + register_param_count_; for (int i = first_stack_param; i < types_length; i++) { if (!machine_types_[i].IsTagged()) return false; } return true; } #endif // DEBUG void CallInterfaceDescriptorData::Reset() { delete[] machine_types_; machine_types_ = nullptr; delete[] register_params_; register_params_ = nullptr; } // static CallInterfaceDescriptorData CallDescriptors::call_descriptor_data_[NUMBER_OF_DESCRIPTORS]; void CallDescriptors::InitializeOncePerProcess() { #define INTERFACE_DESCRIPTOR(name, ...) \ name##Descriptor().Initialize(&call_descriptor_data_[CallDescriptors::name]); INTERFACE_DESCRIPTOR_LIST(INTERFACE_DESCRIPTOR) #undef INTERFACE_DESCRIPTOR DCHECK(ContextOnlyDescriptor{}.HasContextParameter()); DCHECK(!NoContextDescriptor{}.HasContextParameter()); DCHECK(!AllocateDescriptor{}.HasContextParameter()); DCHECK(!AbortDescriptor{}.HasContextParameter()); DCHECK(!WasmFloat32ToNumberDescriptor{}.HasContextParameter()); DCHECK(!WasmFloat64ToNumberDescriptor{}.HasContextParameter()); } void CallDescriptors::TearDown() { for (CallInterfaceDescriptorData& data : call_descriptor_data_) { data.Reset(); } } void CallInterfaceDescriptor::JSDefaultInitializePlatformSpecific( CallInterfaceDescriptorData* data, int non_js_register_parameter_count) { DCHECK_LE(static_cast<unsigned>(non_js_register_parameter_count), 1); // 3 is for kTarget, kNewTarget and kActualArgumentsCount int register_parameter_count = 3 + non_js_register_parameter_count; DCHECK(!AreAliased( kJavaScriptCallTargetRegister, kJavaScriptCallNewTargetRegister, kJavaScriptCallArgCountRegister, kJavaScriptCallExtraArg1Register)); const Register default_js_stub_registers[] = { kJavaScriptCallTargetRegister, kJavaScriptCallNewTargetRegister, kJavaScriptCallArgCountRegister, kJavaScriptCallExtraArg1Register}; CHECK_LE(static_cast<size_t>(register_parameter_count), arraysize(default_js_stub_registers)); data->InitializePlatformSpecific(register_parameter_count, default_js_stub_registers); } const char* CallInterfaceDescriptor::DebugName() const { CallDescriptors::Key key = CallDescriptors::GetKey(data_); switch (key) { #define DEF_CASE(name, ...) \ case CallDescriptors::name: \ return #name " Descriptor"; INTERFACE_DESCRIPTOR_LIST(DEF_CASE) #undef DEF_CASE case CallDescriptors::NUMBER_OF_DESCRIPTORS: break; } return ""; } #if !defined(V8_TARGET_ARCH_MIPS) && !defined(V8_TARGET_ARCH_MIPS64) bool CallInterfaceDescriptor::IsValidFloatParameterRegister(Register reg) { return true; } #endif void VoidDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { data->InitializePlatformSpecific(0, nullptr); } void AllocateDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { Register registers[] = {kAllocateSizeRegister}; data->InitializePlatformSpecific(arraysize(registers), registers); } void CEntry1ArgvOnStackDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { Register registers[] = {kRuntimeCallArgCountRegister, kRuntimeCallFunctionRegister}; data->InitializePlatformSpecific(arraysize(registers), registers); } namespace { void InterpreterCEntryDescriptor_InitializePlatformSpecific( CallInterfaceDescriptorData* data) { Register registers[] = {kRuntimeCallArgCountRegister, kRuntimeCallArgvRegister, kRuntimeCallFunctionRegister}; data->InitializePlatformSpecific(arraysize(registers), registers); } } // namespace void InterpreterCEntry1Descriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { InterpreterCEntryDescriptor_InitializePlatformSpecific(data); } void InterpreterCEntry2Descriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { InterpreterCEntryDescriptor_InitializePlatformSpecific(data); } void FastNewObjectDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { Register registers[] = {TargetRegister(), NewTargetRegister()}; data->InitializePlatformSpecific(arraysize(registers), registers); } const Register FastNewObjectDescriptor::TargetRegister() { return kJSFunctionRegister; } const Register FastNewObjectDescriptor::NewTargetRegister() { return kJavaScriptCallNewTargetRegister; } void LoadDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { Register registers[] = {ReceiverRegister(), NameRegister(), SlotRegister()}; data->InitializePlatformSpecific(arraysize(registers), registers); } void LoadNoFeedbackDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { Register registers[] = {ReceiverRegister(), NameRegister(), ICKindRegister()}; data->InitializePlatformSpecific(arraysize(registers), registers); } void LoadGlobalDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { Register registers[] = {NameRegister(), SlotRegister()}; data->InitializePlatformSpecific(arraysize(registers), registers); } void LoadGlobalNoFeedbackDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { Register registers[] = {NameRegister(), ICKindRegister()}; data->InitializePlatformSpecific(arraysize(registers), registers); } void LoadGlobalWithVectorDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { Register registers[] = {NameRegister(), SlotRegister(), VectorRegister()}; data->InitializePlatformSpecific(arraysize(registers), registers); } void StoreGlobalDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { Register registers[] = {NameRegister(), ValueRegister(), SlotRegister()}; int len = arraysize(registers) - kStackArgumentsCount; data->InitializePlatformSpecific(len, registers); } void StoreGlobalWithVectorDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { Register registers[] = {NameRegister(), ValueRegister(), SlotRegister(), VectorRegister()}; int len = arraysize(registers) - kStackArgumentsCount; data->InitializePlatformSpecific(len, registers); } void StoreDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { Register registers[] = {ReceiverRegister(), NameRegister(), ValueRegister(), SlotRegister()}; int len = arraysize(registers) - kStackArgumentsCount; data->InitializePlatformSpecific(len, registers); } void StoreTransitionDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { Register registers[] = { ReceiverRegister(), NameRegister(), MapRegister(), ValueRegister(), SlotRegister(), VectorRegister(), }; int len = arraysize(registers) - kStackArgumentsCount; data->InitializePlatformSpecific(len, registers); } void StringAtDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { DefaultInitializePlatformSpecific(data, kParameterCount); } void StringAtAsStringDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { DefaultInitializePlatformSpecific(data, kParameterCount); } void StringSubstringDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { DefaultInitializePlatformSpecific(data, kParameterCount); } void TypeConversionDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { Register registers[] = {ArgumentRegister()}; data->InitializePlatformSpecific(arraysize(registers), registers); } void TypeConversionStackParameterDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { data->InitializePlatformSpecific(0, nullptr); } void AsyncFunctionStackParameterDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { data->InitializePlatformSpecific(0, nullptr); } void GetIteratorStackParameterDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { data->InitializePlatformSpecific(0, nullptr); } void LoadWithVectorDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { Register registers[] = {ReceiverRegister(), NameRegister(), SlotRegister(), VectorRegister()}; // TODO(jgruber): This DCHECK could be enabled if RegisterBase::ListOf were // to allow no_reg entries. // DCHECK(!AreAliased(ReceiverRegister(), NameRegister(), SlotRegister(), // VectorRegister(), kRootRegister)); int len = arraysize(registers) - kStackArgumentsCount; data->InitializePlatformSpecific(len, registers); } void StoreWithVectorDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { Register registers[] = {ReceiverRegister(), NameRegister(), ValueRegister(), SlotRegister(), VectorRegister()}; // TODO(jgruber): This DCHECK could be enabled if RegisterBase::ListOf were // to allow no_reg entries. // DCHECK(!AreAliased(ReceiverRegister(), NameRegister(), kRootRegister)); int len = arraysize(registers) - kStackArgumentsCount; data->InitializePlatformSpecific(len, registers); } const Register ApiGetterDescriptor::ReceiverRegister() { return LoadDescriptor::ReceiverRegister(); } void ApiGetterDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { Register registers[] = {ReceiverRegister(), HolderRegister(), CallbackRegister()}; data->InitializePlatformSpecific(arraysize(registers), registers); } void ContextOnlyDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { data->InitializePlatformSpecific(0, nullptr); } void NoContextDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { data->InitializePlatformSpecific(0, nullptr); } void GrowArrayElementsDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { Register registers[] = {ObjectRegister(), KeyRegister()}; data->InitializePlatformSpecific(arraysize(registers), registers); } void ArrayNoArgumentConstructorDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { // This descriptor must use the same set of registers as the // ArrayNArgumentsConstructorDescriptor. ArrayNArgumentsConstructorDescriptor::InitializePlatformSpecific(data); } void ArraySingleArgumentConstructorDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { // This descriptor must use the same set of registers as the // ArrayNArgumentsConstructorDescriptor. ArrayNArgumentsConstructorDescriptor::InitializePlatformSpecific(data); } void ArrayNArgumentsConstructorDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { // Keep the arguments on the same registers as they were in // ArrayConstructorDescriptor to avoid unnecessary register moves. // kFunction, kAllocationSite, kActualArgumentsCount Register registers[] = {kJavaScriptCallTargetRegister, kJavaScriptCallExtraArg1Register, kJavaScriptCallArgCountRegister}; data->InitializePlatformSpecific(arraysize(registers), registers); } #if !V8_TARGET_ARCH_IA32 // We need a custom descriptor on ia32 to avoid using xmm0. void WasmFloat32ToNumberDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { DefaultInitializePlatformSpecific(data, kParameterCount); } // We need a custom descriptor on ia32 to avoid using xmm0. void WasmFloat64ToNumberDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { DefaultInitializePlatformSpecific(data, kParameterCount); } #endif // !V8_TARGET_ARCH_IA32 #if !defined(V8_TARGET_ARCH_MIPS) && !defined(V8_TARGET_ARCH_MIPS64) void WasmI32AtomicWait32Descriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { DefaultInitializePlatformSpecific(data, kParameterCount); } void WasmI64AtomicWait32Descriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { DefaultInitializePlatformSpecific(data, kParameterCount - kStackArgumentsCount); } #endif void CloneObjectWithVectorDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { DefaultInitializePlatformSpecific(data, kParameterCount); } // static Register RunMicrotasksDescriptor::MicrotaskQueueRegister() { return CallDescriptors::call_descriptor_data(CallDescriptors::RunMicrotasks) ->register_param(0); } void RunMicrotasksDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { DefaultInitializePlatformSpecific(data, kParameterCount); } void I64ToBigIntDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { DefaultInitializePlatformSpecific(data, kParameterCount); } void I32PairToBigIntDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { DefaultInitializePlatformSpecific(data, kParameterCount); } void BigIntToI64Descriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { DefaultInitializePlatformSpecific(data, kParameterCount); } void BigIntToI32PairDescriptor::InitializePlatformSpecific( CallInterfaceDescriptorData* data) { DefaultInitializePlatformSpecific(data, kParameterCount); } } // namespace internal } // namespace v8