| // Copyright 2014 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. |
| |
| #ifndef V8_RUNTIME_RUNTIME_UTILS_H_ |
| #define V8_RUNTIME_RUNTIME_UTILS_H_ |
| |
| |
| namespace v8 { |
| namespace internal { |
| |
| #define RUNTIME_ASSERT(value) \ |
| if (!(value)) return isolate->ThrowIllegalOperation(); |
| |
| #define RUNTIME_ASSERT_HANDLIFIED(value, T) \ |
| if (!(value)) { \ |
| isolate->ThrowIllegalOperation(); \ |
| return MaybeHandle<T>(); \ |
| } |
| |
| // Cast the given object to a value of the specified type and store |
| // it in a variable with the given name. If the object is not of the |
| // expected type call IllegalOperation and return. |
| #define CONVERT_ARG_CHECKED(Type, name, index) \ |
| RUNTIME_ASSERT(args[index]->Is##Type()); \ |
| Type* name = Type::cast(args[index]); |
| |
| #define CONVERT_ARG_HANDLE_CHECKED(Type, name, index) \ |
| RUNTIME_ASSERT(args[index]->Is##Type()); \ |
| Handle<Type> name = args.at<Type>(index); |
| |
| #define CONVERT_NUMBER_ARG_HANDLE_CHECKED(name, index) \ |
| RUNTIME_ASSERT(args[index]->IsNumber()); \ |
| Handle<Object> name = args.at<Object>(index); |
| |
| // Cast the given object to a boolean and store it in a variable with |
| // the given name. If the object is not a boolean call IllegalOperation |
| // and return. |
| #define CONVERT_BOOLEAN_ARG_CHECKED(name, index) \ |
| RUNTIME_ASSERT(args[index]->IsBoolean()); \ |
| bool name = args[index]->IsTrue(); |
| |
| // Cast the given argument to a Smi and store its value in an int variable |
| // with the given name. If the argument is not a Smi call IllegalOperation |
| // and return. |
| #define CONVERT_SMI_ARG_CHECKED(name, index) \ |
| RUNTIME_ASSERT(args[index]->IsSmi()); \ |
| int name = args.smi_at(index); |
| |
| // Cast the given argument to a double and store it in a variable with |
| // the given name. If the argument is not a number (as opposed to |
| // the number not-a-number) call IllegalOperation and return. |
| #define CONVERT_DOUBLE_ARG_CHECKED(name, index) \ |
| RUNTIME_ASSERT(args[index]->IsNumber()); \ |
| double name = args.number_at(index); |
| |
| // Call the specified converter on the object *comand store the result in |
| // a variable of the specified type with the given name. If the |
| // object is not a Number call IllegalOperation and return. |
| #define CONVERT_NUMBER_CHECKED(type, name, Type, obj) \ |
| RUNTIME_ASSERT(obj->IsNumber()); \ |
| type name = NumberTo##Type(obj); |
| |
| |
| // Cast the given argument to PropertyDetails and store its value in a |
| // variable with the given name. If the argument is not a Smi call |
| // IllegalOperation and return. |
| #define CONVERT_PROPERTY_DETAILS_CHECKED(name, index) \ |
| RUNTIME_ASSERT(args[index]->IsSmi()); \ |
| PropertyDetails name = PropertyDetails(Smi::cast(args[index])); |
| |
| |
| // Assert that the given argument has a valid value for a StrictMode |
| // and store it in a StrictMode variable with the given name. |
| #define CONVERT_STRICT_MODE_ARG_CHECKED(name, index) \ |
| RUNTIME_ASSERT(args[index]->IsSmi()); \ |
| RUNTIME_ASSERT(args.smi_at(index) == STRICT || \ |
| args.smi_at(index) == SLOPPY); \ |
| StrictMode name = static_cast<StrictMode>(args.smi_at(index)); |
| |
| |
| // Assert that the given argument is a number within the Int32 range |
| // and convert it to int32_t. If the argument is not an Int32 call |
| // IllegalOperation and return. |
| #define CONVERT_INT32_ARG_CHECKED(name, index) \ |
| RUNTIME_ASSERT(args[index]->IsNumber()); \ |
| int32_t name = 0; \ |
| RUNTIME_ASSERT(args[index]->ToInt32(&name)); |
| |
| |
| // A mechanism to return a pair of Object pointers in registers (if possible). |
| // How this is achieved is calling convention-dependent. |
| // All currently supported x86 compiles uses calling conventions that are cdecl |
| // variants where a 64-bit value is returned in two 32-bit registers |
| // (edx:eax on ia32, r1:r0 on ARM). |
| // In AMD-64 calling convention a struct of two pointers is returned in rdx:rax. |
| // In Win64 calling convention, a struct of two pointers is returned in memory, |
| // allocated by the caller, and passed as a pointer in a hidden first parameter. |
| #ifdef V8_HOST_ARCH_64_BIT |
| struct ObjectPair { |
| Object* x; |
| Object* y; |
| }; |
| |
| |
| static inline ObjectPair MakePair(Object* x, Object* y) { |
| ObjectPair result = {x, y}; |
| // Pointers x and y returned in rax and rdx, in AMD-x64-abi. |
| // In Win64 they are assigned to a hidden first argument. |
| return result; |
| } |
| #elif V8_TARGET_ARCH_X64 && V8_TARGET_ARCH_32_BIT |
| // For x32 a 128-bit struct return is done as rax and rdx from the ObjectPair |
| // are used in the full codegen and Crankshaft compiler. An alternative is |
| // using uint64_t and modifying full codegen and Crankshaft compiler. |
| struct ObjectPair { |
| Object* x; |
| uint32_t x_upper; |
| Object* y; |
| uint32_t y_upper; |
| }; |
| |
| |
| static inline ObjectPair MakePair(Object* x, Object* y) { |
| ObjectPair result = {x, 0, y, 0}; |
| // Pointers x and y returned in rax and rdx, in x32-abi. |
| return result; |
| } |
| #else |
| typedef uint64_t ObjectPair; |
| static inline ObjectPair MakePair(Object* x, Object* y) { |
| #if defined(V8_TARGET_LITTLE_ENDIAN) |
| return reinterpret_cast<uint32_t>(x) | |
| (reinterpret_cast<ObjectPair>(y) << 32); |
| #elif defined(V8_TARGET_BIG_ENDIAN) |
| return reinterpret_cast<uint32_t>(y) | |
| (reinterpret_cast<ObjectPair>(x) << 32); |
| #else |
| #error Unknown endianness |
| #endif |
| } |
| #endif |
| |
| } |
| } // namespace v8::internal |
| |
| #endif // V8_RUNTIME_RUNTIME_UTILS_H_ |