Index: src/runtime/runtime-utils.h |
diff --git a/src/runtime/runtime-utils.h b/src/runtime/runtime-utils.h |
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+// 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_UTILS_H_ |
+#define V8_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_UTILS_H_ |