Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1 | // Copyright 2014 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #ifndef V8_RUNTIME_RUNTIME_UTILS_H_ |
| 6 | #define V8_RUNTIME_RUNTIME_UTILS_H_ |
| 7 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 8 | #include "src/base/logging.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 9 | #include "src/runtime/runtime.h" |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 10 | |
| 11 | namespace v8 { |
| 12 | namespace internal { |
| 13 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 14 | #ifdef DEBUG |
| 15 | |
| 16 | #define RUNTIME_ASSERT(value) \ |
| 17 | do { \ |
| 18 | if (!(value)) { \ |
| 19 | V8_RuntimeError(__FILE__, __LINE__, #value); \ |
| 20 | return isolate->ThrowIllegalOperation(); \ |
| 21 | } \ |
| 22 | } while (0) |
| 23 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 24 | #else |
| 25 | |
| 26 | #define RUNTIME_ASSERT(value) \ |
| 27 | do { \ |
| 28 | if (!(value)) { \ |
| 29 | return isolate->ThrowIllegalOperation(); \ |
| 30 | } \ |
| 31 | } while (0) |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 32 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 33 | #endif |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 34 | |
| 35 | // Cast the given object to a value of the specified type and store |
| 36 | // it in a variable with the given name. If the object is not of the |
| 37 | // expected type call IllegalOperation and return. |
| 38 | #define CONVERT_ARG_CHECKED(Type, name, index) \ |
| 39 | RUNTIME_ASSERT(args[index]->Is##Type()); \ |
| 40 | Type* name = Type::cast(args[index]); |
| 41 | |
| 42 | #define CONVERT_ARG_HANDLE_CHECKED(Type, name, index) \ |
| 43 | RUNTIME_ASSERT(args[index]->Is##Type()); \ |
| 44 | Handle<Type> name = args.at<Type>(index); |
| 45 | |
| 46 | #define CONVERT_NUMBER_ARG_HANDLE_CHECKED(name, index) \ |
| 47 | RUNTIME_ASSERT(args[index]->IsNumber()); \ |
| 48 | Handle<Object> name = args.at<Object>(index); |
| 49 | |
| 50 | // Cast the given object to a boolean and store it in a variable with |
| 51 | // the given name. If the object is not a boolean call IllegalOperation |
| 52 | // and return. |
| 53 | #define CONVERT_BOOLEAN_ARG_CHECKED(name, index) \ |
| 54 | RUNTIME_ASSERT(args[index]->IsBoolean()); \ |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 55 | bool name = args[index]->IsTrue(isolate); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 56 | |
| 57 | // Cast the given argument to a Smi and store its value in an int variable |
| 58 | // with the given name. If the argument is not a Smi call IllegalOperation |
| 59 | // and return. |
| 60 | #define CONVERT_SMI_ARG_CHECKED(name, index) \ |
| 61 | RUNTIME_ASSERT(args[index]->IsSmi()); \ |
| 62 | int name = args.smi_at(index); |
| 63 | |
| 64 | // Cast the given argument to a double and store it in a variable with |
| 65 | // the given name. If the argument is not a number (as opposed to |
| 66 | // the number not-a-number) call IllegalOperation and return. |
| 67 | #define CONVERT_DOUBLE_ARG_CHECKED(name, index) \ |
| 68 | RUNTIME_ASSERT(args[index]->IsNumber()); \ |
| 69 | double name = args.number_at(index); |
| 70 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 71 | |
| 72 | // Cast the given argument to a size_t and store its value in a variable with |
| 73 | // the given name. If the argument is not a size_t call IllegalOperation and |
| 74 | // return. |
| 75 | #define CONVERT_SIZE_ARG_CHECKED(name, index) \ |
| 76 | RUNTIME_ASSERT(args[index]->IsNumber()); \ |
| 77 | Handle<Object> name##_object = args.at<Object>(index); \ |
| 78 | size_t name = 0; \ |
| 79 | RUNTIME_ASSERT(TryNumberToSize(isolate, *name##_object, &name)); |
| 80 | |
| 81 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 82 | // Call the specified converter on the object *comand store the result in |
| 83 | // a variable of the specified type with the given name. If the |
| 84 | // object is not a Number call IllegalOperation and return. |
| 85 | #define CONVERT_NUMBER_CHECKED(type, name, Type, obj) \ |
| 86 | RUNTIME_ASSERT(obj->IsNumber()); \ |
| 87 | type name = NumberTo##Type(obj); |
| 88 | |
| 89 | |
| 90 | // Cast the given argument to PropertyDetails and store its value in a |
| 91 | // variable with the given name. If the argument is not a Smi call |
| 92 | // IllegalOperation and return. |
| 93 | #define CONVERT_PROPERTY_DETAILS_CHECKED(name, index) \ |
| 94 | RUNTIME_ASSERT(args[index]->IsSmi()); \ |
| 95 | PropertyDetails name = PropertyDetails(Smi::cast(args[index])); |
| 96 | |
| 97 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 98 | // Assert that the given argument has a valid value for a LanguageMode |
| 99 | // and store it in a LanguageMode variable with the given name. |
| 100 | #define CONVERT_LANGUAGE_MODE_ARG_CHECKED(name, index) \ |
| 101 | RUNTIME_ASSERT(args[index]->IsSmi()); \ |
| 102 | RUNTIME_ASSERT(is_valid_language_mode(args.smi_at(index))); \ |
| 103 | LanguageMode name = static_cast<LanguageMode>(args.smi_at(index)); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 104 | |
| 105 | |
| 106 | // Assert that the given argument is a number within the Int32 range |
| 107 | // and convert it to int32_t. If the argument is not an Int32 call |
| 108 | // IllegalOperation and return. |
| 109 | #define CONVERT_INT32_ARG_CHECKED(name, index) \ |
| 110 | RUNTIME_ASSERT(args[index]->IsNumber()); \ |
| 111 | int32_t name = 0; \ |
| 112 | RUNTIME_ASSERT(args[index]->ToInt32(&name)); |
| 113 | |
| 114 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 115 | // Cast the given argument to PropertyAttributes and store its value in a |
| 116 | // variable with the given name. If the argument is not a Smi call or the |
| 117 | // enum value is out of range, call IllegalOperation and return. |
| 118 | #define CONVERT_PROPERTY_ATTRIBUTES_CHECKED(name, index) \ |
| 119 | RUNTIME_ASSERT(args[index]->IsSmi()); \ |
| 120 | RUNTIME_ASSERT( \ |
| 121 | (args.smi_at(index) & ~(READ_ONLY | DONT_ENUM | DONT_DELETE)) == 0); \ |
| 122 | PropertyAttributes name = static_cast<PropertyAttributes>(args.smi_at(index)); |
| 123 | |
| 124 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 125 | // A mechanism to return a pair of Object pointers in registers (if possible). |
| 126 | // How this is achieved is calling convention-dependent. |
| 127 | // All currently supported x86 compiles uses calling conventions that are cdecl |
| 128 | // variants where a 64-bit value is returned in two 32-bit registers |
| 129 | // (edx:eax on ia32, r1:r0 on ARM). |
| 130 | // In AMD-64 calling convention a struct of two pointers is returned in rdx:rax. |
| 131 | // In Win64 calling convention, a struct of two pointers is returned in memory, |
| 132 | // allocated by the caller, and passed as a pointer in a hidden first parameter. |
| 133 | #ifdef V8_HOST_ARCH_64_BIT |
| 134 | struct ObjectPair { |
| 135 | Object* x; |
| 136 | Object* y; |
| 137 | }; |
| 138 | |
| 139 | |
| 140 | static inline ObjectPair MakePair(Object* x, Object* y) { |
| 141 | ObjectPair result = {x, y}; |
| 142 | // Pointers x and y returned in rax and rdx, in AMD-x64-abi. |
| 143 | // In Win64 they are assigned to a hidden first argument. |
| 144 | return result; |
| 145 | } |
| 146 | #elif V8_TARGET_ARCH_X64 && V8_TARGET_ARCH_32_BIT |
| 147 | // For x32 a 128-bit struct return is done as rax and rdx from the ObjectPair |
| 148 | // are used in the full codegen and Crankshaft compiler. An alternative is |
| 149 | // using uint64_t and modifying full codegen and Crankshaft compiler. |
| 150 | struct ObjectPair { |
| 151 | Object* x; |
| 152 | uint32_t x_upper; |
| 153 | Object* y; |
| 154 | uint32_t y_upper; |
| 155 | }; |
| 156 | |
| 157 | |
| 158 | static inline ObjectPair MakePair(Object* x, Object* y) { |
| 159 | ObjectPair result = {x, 0, y, 0}; |
| 160 | // Pointers x and y returned in rax and rdx, in x32-abi. |
| 161 | return result; |
| 162 | } |
| 163 | #else |
| 164 | typedef uint64_t ObjectPair; |
| 165 | static inline ObjectPair MakePair(Object* x, Object* y) { |
| 166 | #if defined(V8_TARGET_LITTLE_ENDIAN) |
| 167 | return reinterpret_cast<uint32_t>(x) | |
| 168 | (reinterpret_cast<ObjectPair>(y) << 32); |
| 169 | #elif defined(V8_TARGET_BIG_ENDIAN) |
| 170 | return reinterpret_cast<uint32_t>(y) | |
| 171 | (reinterpret_cast<ObjectPair>(x) << 32); |
| 172 | #else |
| 173 | #error Unknown endianness |
| 174 | #endif |
| 175 | } |
| 176 | #endif |
| 177 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 178 | |
| 179 | // A mechanism to return a triple of Object pointers. In all calling |
| 180 | // conventions, a struct of two pointers is returned in memory, |
| 181 | // allocated by the caller, and passed as a pointer in a hidden first parameter. |
| 182 | struct ObjectTriple { |
| 183 | Object* x; |
| 184 | Object* y; |
| 185 | Object* z; |
| 186 | }; |
| 187 | |
| 188 | static inline ObjectTriple MakeTriple(Object* x, Object* y, Object* z) { |
| 189 | ObjectTriple result = {x, y, z}; |
| 190 | // ObjectTriple is assigned to a hidden first argument. |
| 191 | return result; |
| 192 | } |
| 193 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 194 | } // namespace internal |
| 195 | } // namespace v8 |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 196 | |
| 197 | #endif // V8_RUNTIME_RUNTIME_UTILS_H_ |