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| 1 // Copyright 2012 the V8 project authors. All rights reserved. | |
| 2 // Redistribution and use in source and binary forms, with or without | |
| 3 // modification, are permitted provided that the following conditions are | |
| 4 // met: | |
| 5 // | |
| 6 // * Redistributions of source code must retain the above copyright | |
| 7 // notice, this list of conditions and the following disclaimer. | |
| 8 // * Redistributions in binary form must reproduce the above | |
| 9 // copyright notice, this list of conditions and the following | |
| 10 // disclaimer in the documentation and/or other materials provided | |
| 11 // with the distribution. | |
| 12 // * Neither the name of Google Inc. nor the names of its | |
| 13 // contributors may be used to endorse or promote products derived | |
| 14 // from this software without specific prior written permission. | |
| 15 // | |
| 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 27 | |
| 28 #ifndef V8_V8UTILS_H_ | |
| 29 #define V8_V8UTILS_H_ | |
| 30 | |
| 31 #include "utils.h" | |
| 32 #include "platform.h" // For va_list on Solaris. | |
| 33 | |
| 34 namespace v8 { | |
| 35 namespace internal { | |
| 36 | |
| 37 // ---------------------------------------------------------------------------- | |
| 38 // I/O support. | |
| 39 | |
| 40 #if __GNUC__ >= 4 | |
| 41 // On gcc we can ask the compiler to check the types of %d-style format | |
| 42 // specifiers and their associated arguments. TODO(erikcorry) fix this | |
| 43 // so it works on MacOSX. | |
| 44 #if defined(__MACH__) && defined(__APPLE__) | |
| 45 #define PRINTF_CHECKING | |
| 46 #define FPRINTF_CHECKING | |
| 47 #define PRINTF_METHOD_CHECKING | |
| 48 #define FPRINTF_METHOD_CHECKING | |
| 49 #else // MacOsX. | |
| 50 #define PRINTF_CHECKING __attribute__ ((format (printf, 1, 2))) | |
| 51 #define FPRINTF_CHECKING __attribute__ ((format (printf, 2, 3))) | |
| 52 #define PRINTF_METHOD_CHECKING __attribute__ ((format (printf, 2, 3))) | |
| 53 #define FPRINTF_METHOD_CHECKING __attribute__ ((format (printf, 3, 4))) | |
| 54 #endif | |
| 55 #else | |
| 56 #define PRINTF_CHECKING | |
| 57 #define FPRINTF_CHECKING | |
| 58 #define PRINTF_METHOD_CHECKING | |
| 59 #define FPRINTF_METHOD_CHECKING | |
| 60 #endif | |
| 61 | |
| 62 // Our version of printf(). | |
| 63 void PRINTF_CHECKING PrintF(const char* format, ...); | |
| 64 void FPRINTF_CHECKING PrintF(FILE* out, const char* format, ...); | |
| 65 | |
| 66 // Prepends the current process ID to the output. | |
| 67 void PRINTF_CHECKING PrintPID(const char* format, ...); | |
| 68 | |
| 69 // Our version of fflush. | |
| 70 void Flush(FILE* out); | |
| 71 | |
| 72 inline void Flush() { | |
| 73 Flush(stdout); | |
| 74 } | |
| 75 | |
| 76 | |
| 77 // Read a line of characters after printing the prompt to stdout. The resulting | |
| 78 // char* needs to be disposed off with DeleteArray by the caller. | |
| 79 char* ReadLine(const char* prompt); | |
| 80 | |
| 81 | |
| 82 // Read and return the raw bytes in a file. the size of the buffer is returned | |
| 83 // in size. | |
| 84 // The returned buffer must be freed by the caller. | |
| 85 byte* ReadBytes(const char* filename, int* size, bool verbose = true); | |
| 86 | |
| 87 | |
| 88 // Append size chars from str to the file given by filename. | |
| 89 // The file is overwritten. Returns the number of chars written. | |
| 90 int AppendChars(const char* filename, | |
| 91 const char* str, | |
| 92 int size, | |
| 93 bool verbose = true); | |
| 94 | |
| 95 | |
| 96 // Write size chars from str to the file given by filename. | |
| 97 // The file is overwritten. Returns the number of chars written. | |
| 98 int WriteChars(const char* filename, | |
| 99 const char* str, | |
| 100 int size, | |
| 101 bool verbose = true); | |
| 102 | |
| 103 | |
| 104 // Write size bytes to the file given by filename. | |
| 105 // The file is overwritten. Returns the number of bytes written. | |
| 106 int WriteBytes(const char* filename, | |
| 107 const byte* bytes, | |
| 108 int size, | |
| 109 bool verbose = true); | |
| 110 | |
| 111 | |
| 112 // Write the C code | |
| 113 // const char* <varname> = "<str>"; | |
| 114 // const int <varname>_len = <len>; | |
| 115 // to the file given by filename. Only the first len chars are written. | |
| 116 int WriteAsCFile(const char* filename, const char* varname, | |
| 117 const char* str, int size, bool verbose = true); | |
| 118 | |
| 119 | |
| 120 // ---------------------------------------------------------------------------- | |
| 121 // Data structures | |
| 122 | |
| 123 template <typename T> | |
| 124 inline Vector< Handle<Object> > HandleVector(v8::internal::Handle<T>* elms, | |
| 125 int length) { | |
| 126 return Vector< Handle<Object> >( | |
| 127 reinterpret_cast<v8::internal::Handle<Object>*>(elms), length); | |
| 128 } | |
| 129 | |
| 130 | |
| 131 // ---------------------------------------------------------------------------- | |
| 132 // Memory | |
| 133 | |
| 134 // Copies words from |src| to |dst|. The data spans must not overlap. | |
| 135 template <typename T> | |
| 136 inline void CopyWords(T* dst, const T* src, size_t num_words) { | |
| 137 STATIC_ASSERT(sizeof(T) == kPointerSize); | |
| 138 ASSERT(Min(dst, const_cast<T*>(src)) + num_words <= | |
| 139 Max(dst, const_cast<T*>(src))); | |
| 140 ASSERT(num_words > 0); | |
| 141 | |
| 142 // Use block copying OS::MemCopy if the segment we're copying is | |
| 143 // enough to justify the extra call/setup overhead. | |
| 144 static const size_t kBlockCopyLimit = 16; | |
| 145 | |
| 146 if (num_words < kBlockCopyLimit) { | |
| 147 do { | |
| 148 num_words--; | |
| 149 *dst++ = *src++; | |
| 150 } while (num_words > 0); | |
| 151 } else { | |
| 152 OS::MemCopy(dst, src, num_words * kPointerSize); | |
| 153 } | |
| 154 } | |
| 155 | |
| 156 | |
| 157 // Copies words from |src| to |dst|. No restrictions. | |
| 158 template <typename T> | |
| 159 inline void MoveWords(T* dst, const T* src, size_t num_words) { | |
| 160 STATIC_ASSERT(sizeof(T) == kPointerSize); | |
| 161 ASSERT(num_words > 0); | |
| 162 | |
| 163 // Use block copying OS::MemCopy if the segment we're copying is | |
| 164 // enough to justify the extra call/setup overhead. | |
| 165 static const size_t kBlockCopyLimit = 16; | |
| 166 | |
| 167 if (num_words < kBlockCopyLimit && | |
| 168 ((dst < src) || (dst >= (src + num_words * kPointerSize)))) { | |
| 169 T* end = dst + num_words; | |
| 170 do { | |
| 171 num_words--; | |
| 172 *dst++ = *src++; | |
| 173 } while (num_words > 0); | |
| 174 } else { | |
| 175 OS::MemMove(dst, src, num_words * kPointerSize); | |
| 176 } | |
| 177 } | |
| 178 | |
| 179 | |
| 180 // Copies data from |src| to |dst|. The data spans must not overlap. | |
| 181 template <typename T> | |
| 182 inline void CopyBytes(T* dst, const T* src, size_t num_bytes) { | |
| 183 STATIC_ASSERT(sizeof(T) == 1); | |
| 184 ASSERT(Min(dst, const_cast<T*>(src)) + num_bytes <= | |
| 185 Max(dst, const_cast<T*>(src))); | |
| 186 if (num_bytes == 0) return; | |
| 187 | |
| 188 // Use block copying OS::MemCopy if the segment we're copying is | |
| 189 // enough to justify the extra call/setup overhead. | |
| 190 static const int kBlockCopyLimit = OS::kMinComplexMemCopy; | |
| 191 | |
| 192 if (num_bytes < static_cast<size_t>(kBlockCopyLimit)) { | |
| 193 do { | |
| 194 num_bytes--; | |
| 195 *dst++ = *src++; | |
| 196 } while (num_bytes > 0); | |
| 197 } else { | |
| 198 OS::MemCopy(dst, src, num_bytes); | |
| 199 } | |
| 200 } | |
| 201 | |
| 202 | |
| 203 template <typename T, typename U> | |
| 204 inline void MemsetPointer(T** dest, U* value, int counter) { | |
| 205 #ifdef DEBUG | |
| 206 T* a = NULL; | |
| 207 U* b = NULL; | |
| 208 a = b; // Fake assignment to check assignability. | |
| 209 USE(a); | |
| 210 #endif // DEBUG | |
| 211 #if V8_HOST_ARCH_IA32 | |
| 212 #define STOS "stosl" | |
| 213 #elif V8_HOST_ARCH_X64 | |
| 214 #define STOS "stosq" | |
| 215 #endif | |
| 216 #if defined(__native_client__) | |
| 217 // This STOS sequence does not validate for x86_64 Native Client. | |
| 218 // Here we #undef STOS to force use of the slower C version. | |
| 219 // TODO(bradchen): Profile V8 and implement a faster REP STOS | |
| 220 // here if the profile indicates it matters. | |
| 221 #undef STOS | |
| 222 #endif | |
| 223 | |
| 224 #if defined(MEMORY_SANITIZER) | |
| 225 // MemorySanitizer does not understand inline assembly. | |
| 226 #undef STOS | |
| 227 #endif | |
| 228 | |
| 229 #if defined(__GNUC__) && defined(STOS) | |
| 230 asm volatile( | |
| 231 "cld;" | |
| 232 "rep ; " STOS | |
| 233 : "+&c" (counter), "+&D" (dest) | |
| 234 : "a" (value) | |
| 235 : "memory", "cc"); | |
| 236 #else | |
| 237 for (int i = 0; i < counter; i++) { | |
| 238 dest[i] = value; | |
| 239 } | |
| 240 #endif | |
| 241 | |
| 242 #undef STOS | |
| 243 } | |
| 244 | |
| 245 | |
| 246 // Simple wrapper that allows an ExternalString to refer to a | |
| 247 // Vector<const char>. Doesn't assume ownership of the data. | |
| 248 class AsciiStringAdapter: public v8::String::ExternalAsciiStringResource { | |
| 249 public: | |
| 250 explicit AsciiStringAdapter(Vector<const char> data) : data_(data) {} | |
| 251 | |
| 252 virtual const char* data() const { return data_.start(); } | |
| 253 | |
| 254 virtual size_t length() const { return data_.length(); } | |
| 255 | |
| 256 private: | |
| 257 Vector<const char> data_; | |
| 258 }; | |
| 259 | |
| 260 | |
| 261 // Simple support to read a file into a 0-terminated C-string. | |
| 262 // The returned buffer must be freed by the caller. | |
| 263 // On return, *exits tells whether the file existed. | |
| 264 Vector<const char> ReadFile(const char* filename, | |
| 265 bool* exists, | |
| 266 bool verbose = true); | |
| 267 Vector<const char> ReadFile(FILE* file, | |
| 268 bool* exists, | |
| 269 bool verbose = true); | |
| 270 | |
| 271 | |
| 272 template <typename sourcechar, typename sinkchar> | |
| 273 INLINE(static void CopyCharsUnsigned(sinkchar* dest, | |
| 274 const sourcechar* src, | |
| 275 int chars)); | |
| 276 #if defined(V8_HOST_ARCH_ARM) | |
| 277 INLINE(void CopyCharsUnsigned(uint8_t* dest, const uint8_t* src, int chars)); | |
| 278 INLINE(void CopyCharsUnsigned(uint16_t* dest, const uint8_t* src, int chars)); | |
| 279 INLINE(void CopyCharsUnsigned(uint16_t* dest, const uint16_t* src, int chars)); | |
| 280 #elif defined(V8_HOST_ARCH_MIPS) | |
| 281 INLINE(void CopyCharsUnsigned(uint8_t* dest, const uint8_t* src, int chars)); | |
| 282 INLINE(void CopyCharsUnsigned(uint16_t* dest, const uint16_t* src, int chars)); | |
| 283 #endif | |
| 284 | |
| 285 // Copy from ASCII/16bit chars to ASCII/16bit chars. | |
| 286 template <typename sourcechar, typename sinkchar> | |
| 287 INLINE(void CopyChars(sinkchar* dest, const sourcechar* src, int chars)); | |
| 288 | |
| 289 template<typename sourcechar, typename sinkchar> | |
| 290 void CopyChars(sinkchar* dest, const sourcechar* src, int chars) { | |
| 291 ASSERT(sizeof(sourcechar) <= 2); | |
| 292 ASSERT(sizeof(sinkchar) <= 2); | |
| 293 if (sizeof(sinkchar) == 1) { | |
| 294 if (sizeof(sourcechar) == 1) { | |
| 295 CopyCharsUnsigned(reinterpret_cast<uint8_t*>(dest), | |
| 296 reinterpret_cast<const uint8_t*>(src), | |
| 297 chars); | |
| 298 } else { | |
| 299 CopyCharsUnsigned(reinterpret_cast<uint8_t*>(dest), | |
| 300 reinterpret_cast<const uint16_t*>(src), | |
| 301 chars); | |
| 302 } | |
| 303 } else { | |
| 304 if (sizeof(sourcechar) == 1) { | |
| 305 CopyCharsUnsigned(reinterpret_cast<uint16_t*>(dest), | |
| 306 reinterpret_cast<const uint8_t*>(src), | |
| 307 chars); | |
| 308 } else { | |
| 309 CopyCharsUnsigned(reinterpret_cast<uint16_t*>(dest), | |
| 310 reinterpret_cast<const uint16_t*>(src), | |
| 311 chars); | |
| 312 } | |
| 313 } | |
| 314 } | |
| 315 | |
| 316 template <typename sourcechar, typename sinkchar> | |
| 317 void CopyCharsUnsigned(sinkchar* dest, const sourcechar* src, int chars) { | |
| 318 sinkchar* limit = dest + chars; | |
| 319 #ifdef V8_HOST_CAN_READ_UNALIGNED | |
| 320 if (sizeof(*dest) == sizeof(*src)) { | |
| 321 if (chars >= static_cast<int>(OS::kMinComplexMemCopy / sizeof(*dest))) { | |
| 322 OS::MemCopy(dest, src, chars * sizeof(*dest)); | |
| 323 return; | |
| 324 } | |
| 325 // Number of characters in a uintptr_t. | |
| 326 static const int kStepSize = sizeof(uintptr_t) / sizeof(*dest); // NOLINT | |
| 327 ASSERT(dest + kStepSize > dest); // Check for overflow. | |
| 328 while (dest + kStepSize <= limit) { | |
| 329 *reinterpret_cast<uintptr_t*>(dest) = | |
| 330 *reinterpret_cast<const uintptr_t*>(src); | |
| 331 dest += kStepSize; | |
| 332 src += kStepSize; | |
| 333 } | |
| 334 } | |
| 335 #endif | |
| 336 while (dest < limit) { | |
| 337 *dest++ = static_cast<sinkchar>(*src++); | |
| 338 } | |
| 339 } | |
| 340 | |
| 341 | |
| 342 #if defined(V8_HOST_ARCH_ARM) | |
| 343 void CopyCharsUnsigned(uint8_t* dest, const uint8_t* src, int chars) { | |
| 344 switch (static_cast<unsigned>(chars)) { | |
| 345 case 0: | |
| 346 break; | |
| 347 case 1: | |
| 348 *dest = *src; | |
| 349 break; | |
| 350 case 2: | |
| 351 memcpy(dest, src, 2); | |
| 352 break; | |
| 353 case 3: | |
| 354 memcpy(dest, src, 3); | |
| 355 break; | |
| 356 case 4: | |
| 357 memcpy(dest, src, 4); | |
| 358 break; | |
| 359 case 5: | |
| 360 memcpy(dest, src, 5); | |
| 361 break; | |
| 362 case 6: | |
| 363 memcpy(dest, src, 6); | |
| 364 break; | |
| 365 case 7: | |
| 366 memcpy(dest, src, 7); | |
| 367 break; | |
| 368 case 8: | |
| 369 memcpy(dest, src, 8); | |
| 370 break; | |
| 371 case 9: | |
| 372 memcpy(dest, src, 9); | |
| 373 break; | |
| 374 case 10: | |
| 375 memcpy(dest, src, 10); | |
| 376 break; | |
| 377 case 11: | |
| 378 memcpy(dest, src, 11); | |
| 379 break; | |
| 380 case 12: | |
| 381 memcpy(dest, src, 12); | |
| 382 break; | |
| 383 case 13: | |
| 384 memcpy(dest, src, 13); | |
| 385 break; | |
| 386 case 14: | |
| 387 memcpy(dest, src, 14); | |
| 388 break; | |
| 389 case 15: | |
| 390 memcpy(dest, src, 15); | |
| 391 break; | |
| 392 default: | |
| 393 OS::MemCopy(dest, src, chars); | |
| 394 break; | |
| 395 } | |
| 396 } | |
| 397 | |
| 398 | |
| 399 void CopyCharsUnsigned(uint16_t* dest, const uint8_t* src, int chars) { | |
| 400 if (chars >= OS::kMinComplexConvertMemCopy) { | |
| 401 OS::MemCopyUint16Uint8(dest, src, chars); | |
| 402 } else { | |
| 403 OS::MemCopyUint16Uint8Wrapper(dest, src, chars); | |
| 404 } | |
| 405 } | |
| 406 | |
| 407 | |
| 408 void CopyCharsUnsigned(uint16_t* dest, const uint16_t* src, int chars) { | |
| 409 switch (static_cast<unsigned>(chars)) { | |
| 410 case 0: | |
| 411 break; | |
| 412 case 1: | |
| 413 *dest = *src; | |
| 414 break; | |
| 415 case 2: | |
| 416 memcpy(dest, src, 4); | |
| 417 break; | |
| 418 case 3: | |
| 419 memcpy(dest, src, 6); | |
| 420 break; | |
| 421 case 4: | |
| 422 memcpy(dest, src, 8); | |
| 423 break; | |
| 424 case 5: | |
| 425 memcpy(dest, src, 10); | |
| 426 break; | |
| 427 case 6: | |
| 428 memcpy(dest, src, 12); | |
| 429 break; | |
| 430 case 7: | |
| 431 memcpy(dest, src, 14); | |
| 432 break; | |
| 433 default: | |
| 434 OS::MemCopy(dest, src, chars * sizeof(*dest)); | |
| 435 break; | |
| 436 } | |
| 437 } | |
| 438 | |
| 439 | |
| 440 #elif defined(V8_HOST_ARCH_MIPS) | |
| 441 void CopyCharsUnsigned(uint8_t* dest, const uint8_t* src, int chars) { | |
| 442 if (chars < OS::kMinComplexMemCopy) { | |
| 443 memcpy(dest, src, chars); | |
| 444 } else { | |
| 445 OS::MemCopy(dest, src, chars); | |
| 446 } | |
| 447 } | |
| 448 | |
| 449 void CopyCharsUnsigned(uint16_t* dest, const uint16_t* src, int chars) { | |
| 450 if (chars < OS::kMinComplexMemCopy) { | |
| 451 memcpy(dest, src, chars * sizeof(*dest)); | |
| 452 } else { | |
| 453 OS::MemCopy(dest, src, chars * sizeof(*dest)); | |
| 454 } | |
| 455 } | |
| 456 #endif | |
| 457 | |
| 458 | |
| 459 class StringBuilder : public SimpleStringBuilder { | |
| 460 public: | |
| 461 explicit StringBuilder(int size) : SimpleStringBuilder(size) { } | |
| 462 StringBuilder(char* buffer, int size) : SimpleStringBuilder(buffer, size) { } | |
| 463 | |
| 464 // Add formatted contents to the builder just like printf(). | |
| 465 void AddFormatted(const char* format, ...); | |
| 466 | |
| 467 // Add formatted contents like printf based on a va_list. | |
| 468 void AddFormattedList(const char* format, va_list list); | |
| 469 private: | |
| 470 DISALLOW_IMPLICIT_CONSTRUCTORS(StringBuilder); | |
| 471 }; | |
| 472 | |
| 473 } } // namespace v8::internal | |
| 474 | |
| 475 #endif // V8_V8UTILS_H_ | |
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Chromium Code Reviews
Issue 250733004:
Enter a description of the change. (Closed)
Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge