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| 1 // Copyright 2012 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_X64_REGEXP_MACRO_ASSEMBLER_X64_H_ | |
| 6 #define V8_X64_REGEXP_MACRO_ASSEMBLER_X64_H_ | |
| 7 | |
| 8 #include "src/macro-assembler.h" | |
| 9 #include "src/x64/assembler-x64.h" | |
| 10 #include "src/x64/macro-assembler-x64.h" | |
| 11 | |
| 12 namespace v8 { | |
| 13 namespace internal { | |
| 14 | |
| 15 #ifndef V8_INTERPRETED_REGEXP | |
| 16 | |
| 17 class RegExpMacroAssemblerX64: public NativeRegExpMacroAssembler { | |
| 18 public: | |
| 19 RegExpMacroAssemblerX64(Isolate* isolate, Zone* zone, Mode mode, | |
| 20 int registers_to_save); | |
| 21 virtual ~RegExpMacroAssemblerX64(); | |
| 22 virtual int stack_limit_slack(); | |
| 23 virtual void AdvanceCurrentPosition(int by); | |
| 24 virtual void AdvanceRegister(int reg, int by); | |
| 25 virtual void Backtrack(); | |
| 26 virtual void Bind(Label* label); | |
| 27 virtual void CheckAtStart(Label* on_at_start); | |
| 28 virtual void CheckCharacter(uint32_t c, Label* on_equal); | |
| 29 virtual void CheckCharacterAfterAnd(uint32_t c, | |
| 30 uint32_t mask, | |
| 31 Label* on_equal); | |
| 32 virtual void CheckCharacterGT(uc16 limit, Label* on_greater); | |
| 33 virtual void CheckCharacterLT(uc16 limit, Label* on_less); | |
| 34 // A "greedy loop" is a loop that is both greedy and with a simple | |
| 35 // body. It has a particularly simple implementation. | |
| 36 virtual void CheckGreedyLoop(Label* on_tos_equals_current_position); | |
| 37 virtual void CheckNotAtStart(Label* on_not_at_start); | |
| 38 virtual void CheckNotBackReference(int start_reg, Label* on_no_match); | |
| 39 virtual void CheckNotBackReferenceIgnoreCase(int start_reg, | |
| 40 Label* on_no_match); | |
| 41 virtual void CheckNotCharacter(uint32_t c, Label* on_not_equal); | |
| 42 virtual void CheckNotCharacterAfterAnd(uint32_t c, | |
| 43 uint32_t mask, | |
| 44 Label* on_not_equal); | |
| 45 virtual void CheckNotCharacterAfterMinusAnd(uc16 c, | |
| 46 uc16 minus, | |
| 47 uc16 mask, | |
| 48 Label* on_not_equal); | |
| 49 virtual void CheckCharacterInRange(uc16 from, | |
| 50 uc16 to, | |
| 51 Label* on_in_range); | |
| 52 virtual void CheckCharacterNotInRange(uc16 from, | |
| 53 uc16 to, | |
| 54 Label* on_not_in_range); | |
| 55 virtual void CheckBitInTable(Handle<ByteArray> table, Label* on_bit_set); | |
| 56 | |
| 57 // Checks whether the given offset from the current position is before | |
| 58 // the end of the string. | |
| 59 virtual void CheckPosition(int cp_offset, Label* on_outside_input); | |
| 60 virtual bool CheckSpecialCharacterClass(uc16 type, | |
| 61 Label* on_no_match); | |
| 62 virtual void Fail(); | |
| 63 virtual Handle<HeapObject> GetCode(Handle<String> source); | |
| 64 virtual void GoTo(Label* label); | |
| 65 virtual void IfRegisterGE(int reg, int comparand, Label* if_ge); | |
| 66 virtual void IfRegisterLT(int reg, int comparand, Label* if_lt); | |
| 67 virtual void IfRegisterEqPos(int reg, Label* if_eq); | |
| 68 virtual IrregexpImplementation Implementation(); | |
| 69 virtual void LoadCurrentCharacter(int cp_offset, | |
| 70 Label* on_end_of_input, | |
| 71 bool check_bounds = true, | |
| 72 int characters = 1); | |
| 73 virtual void PopCurrentPosition(); | |
| 74 virtual void PopRegister(int register_index); | |
| 75 virtual void PushBacktrack(Label* label); | |
| 76 virtual void PushCurrentPosition(); | |
| 77 virtual void PushRegister(int register_index, | |
| 78 StackCheckFlag check_stack_limit); | |
| 79 virtual void ReadCurrentPositionFromRegister(int reg); | |
| 80 virtual void ReadStackPointerFromRegister(int reg); | |
| 81 virtual void SetCurrentPositionFromEnd(int by); | |
| 82 virtual void SetRegister(int register_index, int to); | |
| 83 virtual bool Succeed(); | |
| 84 virtual void WriteCurrentPositionToRegister(int reg, int cp_offset); | |
| 85 virtual void ClearRegisters(int reg_from, int reg_to); | |
| 86 virtual void WriteStackPointerToRegister(int reg); | |
| 87 | |
| 88 static Result Match(Handle<Code> regexp, | |
| 89 Handle<String> subject, | |
| 90 int* offsets_vector, | |
| 91 int offsets_vector_length, | |
| 92 int previous_index, | |
| 93 Isolate* isolate); | |
| 94 | |
| 95 static Result Execute(Code* code, | |
| 96 String* input, | |
| 97 int start_offset, | |
| 98 const byte* input_start, | |
| 99 const byte* input_end, | |
| 100 int* output, | |
| 101 bool at_start); | |
| 102 | |
| 103 // Called from RegExp if the stack-guard is triggered. | |
| 104 // If the code object is relocated, the return address is fixed before | |
| 105 // returning. | |
| 106 static int CheckStackGuardState(Address* return_address, | |
| 107 Code* re_code, | |
| 108 Address re_frame); | |
| 109 | |
| 110 private: | |
| 111 // Offsets from rbp of function parameters and stored registers. | |
| 112 static const int kFramePointer = 0; | |
| 113 // Above the frame pointer - function parameters and return address. | |
| 114 static const int kReturn_eip = kFramePointer + kRegisterSize; | |
| 115 static const int kFrameAlign = kReturn_eip + kRegisterSize; | |
| 116 | |
| 117 #ifdef _WIN64 | |
| 118 // Parameters (first four passed as registers, but with room on stack). | |
| 119 // In Microsoft 64-bit Calling Convention, there is room on the callers | |
| 120 // stack (before the return address) to spill parameter registers. We | |
| 121 // use this space to store the register passed parameters. | |
| 122 static const int kInputString = kFrameAlign; | |
| 123 // StartIndex is passed as 32 bit int. | |
| 124 static const int kStartIndex = kInputString + kRegisterSize; | |
| 125 static const int kInputStart = kStartIndex + kRegisterSize; | |
| 126 static const int kInputEnd = kInputStart + kRegisterSize; | |
| 127 static const int kRegisterOutput = kInputEnd + kRegisterSize; | |
| 128 // For the case of global regular expression, we have room to store at least | |
| 129 // one set of capture results. For the case of non-global regexp, we ignore | |
| 130 // this value. NumOutputRegisters is passed as 32-bit value. The upper | |
| 131 // 32 bit of this 64-bit stack slot may contain garbage. | |
| 132 static const int kNumOutputRegisters = kRegisterOutput + kRegisterSize; | |
| 133 static const int kStackHighEnd = kNumOutputRegisters + kRegisterSize; | |
| 134 // DirectCall is passed as 32 bit int (values 0 or 1). | |
| 135 static const int kDirectCall = kStackHighEnd + kRegisterSize; | |
| 136 static const int kIsolate = kDirectCall + kRegisterSize; | |
| 137 #else | |
| 138 // In AMD64 ABI Calling Convention, the first six integer parameters | |
| 139 // are passed as registers, and caller must allocate space on the stack | |
| 140 // if it wants them stored. We push the parameters after the frame pointer. | |
| 141 static const int kInputString = kFramePointer - kRegisterSize; | |
| 142 static const int kStartIndex = kInputString - kRegisterSize; | |
| 143 static const int kInputStart = kStartIndex - kRegisterSize; | |
| 144 static const int kInputEnd = kInputStart - kRegisterSize; | |
| 145 static const int kRegisterOutput = kInputEnd - kRegisterSize; | |
| 146 | |
| 147 // For the case of global regular expression, we have room to store at least | |
| 148 // one set of capture results. For the case of non-global regexp, we ignore | |
| 149 // this value. | |
| 150 static const int kNumOutputRegisters = kRegisterOutput - kRegisterSize; | |
| 151 static const int kStackHighEnd = kFrameAlign; | |
| 152 static const int kDirectCall = kStackHighEnd + kRegisterSize; | |
| 153 static const int kIsolate = kDirectCall + kRegisterSize; | |
| 154 #endif | |
| 155 | |
| 156 #ifdef _WIN64 | |
| 157 // Microsoft calling convention has three callee-saved registers | |
| 158 // (that we are using). We push these after the frame pointer. | |
| 159 static const int kBackup_rsi = kFramePointer - kRegisterSize; | |
| 160 static const int kBackup_rdi = kBackup_rsi - kRegisterSize; | |
| 161 static const int kBackup_rbx = kBackup_rdi - kRegisterSize; | |
| 162 static const int kLastCalleeSaveRegister = kBackup_rbx; | |
| 163 #else | |
| 164 // AMD64 Calling Convention has only one callee-save register that | |
| 165 // we use. We push this after the frame pointer (and after the | |
| 166 // parameters). | |
| 167 static const int kBackup_rbx = kNumOutputRegisters - kRegisterSize; | |
| 168 static const int kLastCalleeSaveRegister = kBackup_rbx; | |
| 169 #endif | |
| 170 | |
| 171 static const int kSuccessfulCaptures = kLastCalleeSaveRegister - kPointerSize; | |
| 172 // When adding local variables remember to push space for them in | |
| 173 // the frame in GetCode. | |
| 174 static const int kInputStartMinusOne = kSuccessfulCaptures - kPointerSize; | |
| 175 | |
| 176 // First register address. Following registers are below it on the stack. | |
| 177 static const int kRegisterZero = kInputStartMinusOne - kPointerSize; | |
| 178 | |
| 179 // Initial size of code buffer. | |
| 180 static const size_t kRegExpCodeSize = 1024; | |
| 181 | |
| 182 // Load a number of characters at the given offset from the | |
| 183 // current position, into the current-character register. | |
| 184 void LoadCurrentCharacterUnchecked(int cp_offset, int character_count); | |
| 185 | |
| 186 // Check whether preemption has been requested. | |
| 187 void CheckPreemption(); | |
| 188 | |
| 189 // Check whether we are exceeding the stack limit on the backtrack stack. | |
| 190 void CheckStackLimit(); | |
| 191 | |
| 192 // Generate a call to CheckStackGuardState. | |
| 193 void CallCheckStackGuardState(); | |
| 194 | |
| 195 // The rbp-relative location of a regexp register. | |
| 196 Operand register_location(int register_index); | |
| 197 | |
| 198 // The register containing the current character after LoadCurrentCharacter. | |
| 199 inline Register current_character() { return rdx; } | |
| 200 | |
| 201 // The register containing the backtrack stack top. Provides a meaningful | |
| 202 // name to the register. | |
| 203 inline Register backtrack_stackpointer() { return rcx; } | |
| 204 | |
| 205 // The registers containing a self pointer to this code's Code object. | |
| 206 inline Register code_object_pointer() { return r8; } | |
| 207 | |
| 208 // Byte size of chars in the string to match (decided by the Mode argument) | |
| 209 inline int char_size() { return static_cast<int>(mode_); } | |
| 210 | |
| 211 // Equivalent to a conditional branch to the label, unless the label | |
| 212 // is NULL, in which case it is a conditional Backtrack. | |
| 213 void BranchOrBacktrack(Condition condition, Label* to); | |
| 214 | |
| 215 void MarkPositionForCodeRelativeFixup() { | |
| 216 code_relative_fixup_positions_.Add(masm_.pc_offset(), zone()); | |
| 217 } | |
| 218 | |
| 219 void FixupCodeRelativePositions(); | |
| 220 | |
| 221 // Call and return internally in the generated code in a way that | |
| 222 // is GC-safe (i.e., doesn't leave absolute code addresses on the stack) | |
| 223 inline void SafeCall(Label* to); | |
| 224 inline void SafeCallTarget(Label* label); | |
| 225 inline void SafeReturn(); | |
| 226 | |
| 227 // Pushes the value of a register on the backtrack stack. Decrements the | |
| 228 // stack pointer (rcx) by a word size and stores the register's value there. | |
| 229 inline void Push(Register source); | |
| 230 | |
| 231 // Pushes a value on the backtrack stack. Decrements the stack pointer (rcx) | |
| 232 // by a word size and stores the value there. | |
| 233 inline void Push(Immediate value); | |
| 234 | |
| 235 // Pushes the Code object relative offset of a label on the backtrack stack | |
| 236 // (i.e., a backtrack target). Decrements the stack pointer (rcx) | |
| 237 // by a word size and stores the value there. | |
| 238 inline void Push(Label* label); | |
| 239 | |
| 240 // Pops a value from the backtrack stack. Reads the word at the stack pointer | |
| 241 // (rcx) and increments it by a word size. | |
| 242 inline void Pop(Register target); | |
| 243 | |
| 244 // Drops the top value from the backtrack stack without reading it. | |
| 245 // Increments the stack pointer (rcx) by a word size. | |
| 246 inline void Drop(); | |
| 247 | |
| 248 inline void ReadPositionFromRegister(Register dst, int reg); | |
| 249 | |
| 250 Isolate* isolate() const { return masm_.isolate(); } | |
| 251 | |
| 252 MacroAssembler masm_; | |
| 253 MacroAssembler::NoRootArrayScope no_root_array_scope_; | |
| 254 | |
| 255 ZoneList<int> code_relative_fixup_positions_; | |
| 256 | |
| 257 // Which mode to generate code for (LATIN1 or UC16). | |
| 258 Mode mode_; | |
| 259 | |
| 260 // One greater than maximal register index actually used. | |
| 261 int num_registers_; | |
| 262 | |
| 263 // Number of registers to output at the end (the saved registers | |
| 264 // are always 0..num_saved_registers_-1) | |
| 265 int num_saved_registers_; | |
| 266 | |
| 267 // Labels used internally. | |
| 268 Label entry_label_; | |
| 269 Label start_label_; | |
| 270 Label success_label_; | |
| 271 Label backtrack_label_; | |
| 272 Label exit_label_; | |
| 273 Label check_preempt_label_; | |
| 274 Label stack_overflow_label_; | |
| 275 }; | |
| 276 | |
| 277 #endif // V8_INTERPRETED_REGEXP | |
| 278 | |
| 279 }} // namespace v8::internal | |
| 280 | |
| 281 #endif // V8_X64_REGEXP_MACRO_ASSEMBLER_X64_H_ | |
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Chromium Code Reviews
Issue 1285163003:
Move regexp implementation into its own folder. (Closed)
Base URL: https://chromium.googlesource.com/v8/v8.git@master