christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1 | // Copyright 2006-2008 Google Inc. 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 | // Review notes: |
| 29 | // |
| 30 | // - The use of macros in these inline fuctions may seem superfluous |
| 31 | // but it is absolutely needed to make sure gcc generates optimal |
| 32 | // code. gcc is not happy when attempting to inline too deep. |
| 33 | // |
| 34 | |
| 35 | #ifndef V8_OBJECTS_INL_H_ |
| 36 | #define V8_OBJECTS_INL_H_ |
| 37 | |
| 38 | #include "objects.h" |
| 39 | #include "contexts.h" |
| 40 | #include "conversions-inl.h" |
| 41 | #include "property.h" |
| 42 | |
| 43 | namespace v8 { namespace internal { |
| 44 | |
| 45 | PropertyDetails::PropertyDetails(Smi* smi) { |
| 46 | value_ = smi->value(); |
| 47 | } |
| 48 | |
| 49 | |
| 50 | Smi* PropertyDetails::AsSmi() { |
| 51 | return Smi::FromInt(value_); |
| 52 | } |
| 53 | |
| 54 | |
| 55 | #define CAST_ACCESSOR(type) \ |
| 56 | type* type::cast(Object* object) { \ |
| 57 | ASSERT(object->Is##type()); \ |
| 58 | return reinterpret_cast<type*>(object); \ |
| 59 | } |
| 60 | |
| 61 | |
| 62 | #define INT_ACCESSORS(holder, name, offset) \ |
| 63 | int holder::name() { return READ_INT_FIELD(this, offset); } \ |
| 64 | void holder::set_##name(int value) { WRITE_INT_FIELD(this, offset, value); } |
| 65 | |
| 66 | |
| 67 | #define ACCESSORS(holder, name, type, offset) \ |
| 68 | type* holder::name() { return type::cast(READ_FIELD(this, offset)); } \ |
| 69 | void holder::set_##name(type* value) { \ |
| 70 | WRITE_FIELD(this, offset, value); \ |
| 71 | WRITE_BARRIER(this, offset); \ |
| 72 | } |
| 73 | |
| 74 | |
| 75 | #define SMI_ACCESSORS(holder, name, offset) \ |
| 76 | int holder::name() { \ |
| 77 | Object* value = READ_FIELD(this, offset); \ |
| 78 | return Smi::cast(value)->value(); \ |
| 79 | } \ |
| 80 | void holder::set_##name(int value) { \ |
| 81 | WRITE_FIELD(this, offset, Smi::FromInt(value)); \ |
| 82 | } |
| 83 | |
| 84 | |
| 85 | #define BOOL_ACCESSORS(holder, field, name, offset) \ |
| 86 | bool holder::name() { \ |
| 87 | return BooleanBit::get(field(), offset); \ |
| 88 | } \ |
| 89 | void holder::set_##name(bool value) { \ |
| 90 | set_##field(BooleanBit::set(field(), offset, value)); \ |
| 91 | } |
| 92 | |
| 93 | |
| 94 | bool Object::IsSmi() { |
| 95 | return HAS_SMI_TAG(this); |
| 96 | } |
| 97 | |
| 98 | |
| 99 | bool Object::IsHeapObject() { |
| 100 | return HAS_HEAP_OBJECT_TAG(this); |
| 101 | } |
| 102 | |
| 103 | |
| 104 | bool Object::IsHeapNumber() { |
| 105 | return Object::IsHeapObject() |
| 106 | && HeapObject::cast(this)->map()->instance_type() == HEAP_NUMBER_TYPE; |
| 107 | } |
| 108 | |
| 109 | |
| 110 | bool Object::IsString() { |
| 111 | return Object::IsHeapObject() |
| 112 | && HeapObject::cast(this)->map()->instance_type() < FIRST_NONSTRING_TYPE; |
| 113 | } |
| 114 | |
| 115 | |
| 116 | bool Object::IsSeqString() { |
| 117 | return IsString() |
| 118 | && (String::cast(this)->representation_tag() == kSeqStringTag); |
| 119 | } |
| 120 | |
| 121 | |
| 122 | bool Object::IsAsciiString() { |
| 123 | return IsString() && (String::cast(this)->is_ascii()); |
| 124 | } |
| 125 | |
| 126 | |
| 127 | bool Object::IsTwoByteString() { |
| 128 | return IsString() && (!String::cast(this)->is_ascii()); |
| 129 | } |
| 130 | |
| 131 | |
| 132 | bool Object::IsConsString() { |
| 133 | return IsString() |
| 134 | && (String::cast(this)->representation_tag() == kConsStringTag); |
| 135 | } |
| 136 | |
| 137 | |
| 138 | bool Object::IsSlicedString() { |
| 139 | return IsString() |
| 140 | && (String::cast(this)->representation_tag() == kSlicedStringTag); |
| 141 | } |
| 142 | |
| 143 | |
| 144 | bool Object::IsExternalString() { |
| 145 | return IsString() |
| 146 | && (String::cast(this)->representation_tag() == kExternalStringTag); |
| 147 | } |
| 148 | |
| 149 | |
| 150 | bool Object::IsExternalAsciiString() { |
| 151 | return IsExternalString() && (String::cast(this)->is_ascii()); |
| 152 | } |
| 153 | |
| 154 | |
| 155 | bool Object::IsExternalTwoByteString() { |
| 156 | return IsExternalString() && (!String::cast(this)->is_ascii()); |
| 157 | } |
| 158 | |
| 159 | |
| 160 | bool Object::IsShortString() { |
| 161 | return IsString() && (String::cast(this)->size_tag() == kShortStringTag); |
| 162 | } |
| 163 | |
| 164 | |
| 165 | bool Object::IsMediumString() { |
| 166 | return IsString() && (String::cast(this)->size_tag() == kMediumStringTag); |
| 167 | } |
| 168 | |
| 169 | |
| 170 | bool Object::IsLongString() { |
| 171 | return IsString() && (String::cast(this)->size_tag() == kLongStringTag); |
| 172 | } |
| 173 | |
| 174 | |
| 175 | bool Object::IsSymbol() { |
| 176 | return IsString() && (String::cast(this)->is_symbol()); |
| 177 | } |
| 178 | |
| 179 | |
| 180 | bool Object::IsNumber() { |
| 181 | return IsSmi() || IsHeapNumber(); |
| 182 | } |
| 183 | |
| 184 | |
| 185 | bool Object::IsByteArray() { |
| 186 | return Object::IsHeapObject() |
| 187 | && HeapObject::cast(this)->map()->instance_type() == BYTE_ARRAY_TYPE; |
| 188 | } |
| 189 | |
| 190 | |
| 191 | bool Object::IsFailure() { |
| 192 | return HAS_FAILURE_TAG(this); |
| 193 | } |
| 194 | |
| 195 | |
| 196 | bool Object::IsRetryAfterGC() { |
| 197 | return HAS_FAILURE_TAG(this) |
| 198 | && Failure::cast(this)->type() == Failure::RETRY_AFTER_GC; |
| 199 | } |
| 200 | |
| 201 | |
| 202 | bool Object::IsException() { |
| 203 | return this == Failure::Exception(); |
| 204 | } |
| 205 | |
| 206 | |
| 207 | bool Object::IsJSObject() { |
| 208 | return IsHeapObject() |
| 209 | && HeapObject::cast(this)->map()->instance_type() >= JS_OBJECT_TYPE; |
| 210 | } |
| 211 | |
| 212 | |
| 213 | bool Object::IsMap() { |
| 214 | return Object::IsHeapObject() |
| 215 | && HeapObject::cast(this)->map()->instance_type() == MAP_TYPE; |
| 216 | } |
| 217 | |
| 218 | |
| 219 | bool Object::IsFixedArray() { |
| 220 | return Object::IsHeapObject() |
| 221 | && HeapObject::cast(this)->map()->instance_type() == FIXED_ARRAY_TYPE; |
| 222 | } |
| 223 | |
| 224 | |
| 225 | bool Object::IsDescriptorArray() { |
| 226 | return IsFixedArray(); |
| 227 | } |
| 228 | |
| 229 | |
| 230 | bool Object::IsContext() { |
| 231 | return Object::IsHeapObject() |
| 232 | && (HeapObject::cast(this)->map() == Heap::context_map() || |
| 233 | HeapObject::cast(this)->map() == Heap::global_context_map()); |
| 234 | } |
| 235 | |
| 236 | |
| 237 | bool Object::IsGlobalContext() { |
| 238 | return Object::IsHeapObject() |
| 239 | && HeapObject::cast(this)->map() == Heap::global_context_map(); |
| 240 | } |
| 241 | |
| 242 | |
| 243 | bool Object::IsJSFunction() { |
| 244 | return Object::IsHeapObject() |
| 245 | && HeapObject::cast(this)->map()->instance_type() == JS_FUNCTION_TYPE; |
| 246 | } |
| 247 | |
| 248 | |
| 249 | template <> static inline bool Is<JSFunction>(Object* obj) { |
| 250 | return obj->IsJSFunction(); |
| 251 | } |
| 252 | |
| 253 | |
| 254 | bool Object::IsCode() { |
| 255 | return Object::IsHeapObject() |
| 256 | && HeapObject::cast(this)->map()->instance_type() == CODE_TYPE; |
| 257 | } |
| 258 | |
| 259 | |
| 260 | bool Object::IsOddball() { |
| 261 | return Object::IsHeapObject() |
| 262 | && HeapObject::cast(this)->map()->instance_type() == ODDBALL_TYPE; |
| 263 | } |
| 264 | |
| 265 | |
| 266 | bool Object::IsSharedFunctionInfo() { |
| 267 | return Object::IsHeapObject() && |
| 268 | (HeapObject::cast(this)->map()->instance_type() == |
| 269 | SHARED_FUNCTION_INFO_TYPE); |
| 270 | } |
| 271 | |
| 272 | |
| 273 | bool Object::IsJSValue() { |
| 274 | return Object::IsHeapObject() |
| 275 | && HeapObject::cast(this)->map()->instance_type() == JS_VALUE_TYPE; |
| 276 | } |
| 277 | |
| 278 | |
| 279 | bool Object::IsProxy() { |
| 280 | return Object::IsHeapObject() |
| 281 | && HeapObject::cast(this)->map()->instance_type() == PROXY_TYPE; |
| 282 | } |
| 283 | |
| 284 | |
| 285 | bool Object::IsBoolean() { |
| 286 | return IsTrue() || IsFalse(); |
| 287 | } |
| 288 | |
| 289 | |
| 290 | bool Object::IsJSArray() { |
| 291 | return Object::IsHeapObject() |
| 292 | && HeapObject::cast(this)->map()->instance_type() == JS_ARRAY_TYPE; |
| 293 | } |
| 294 | |
| 295 | |
| 296 | template <> static inline bool Is<JSArray>(Object* obj) { |
| 297 | return obj->IsJSArray(); |
| 298 | } |
| 299 | |
| 300 | |
| 301 | bool Object::IsHashTable() { |
| 302 | return Object::IsHeapObject() |
| 303 | && HeapObject::cast(this)->map() == Heap::hash_table_map(); |
| 304 | } |
| 305 | |
| 306 | |
| 307 | bool Object::IsDictionary() { |
| 308 | return IsHashTable() && this != Heap::symbol_table(); |
| 309 | } |
| 310 | |
| 311 | |
| 312 | bool Object::IsSymbolTable() { |
| 313 | return IsHashTable() && this == Heap::symbol_table(); |
| 314 | } |
| 315 | |
| 316 | |
| 317 | bool Object::IsPrimitive() { |
| 318 | return IsOddball() || IsNumber() || IsString(); |
| 319 | } |
| 320 | |
| 321 | |
| 322 | bool Object::IsGlobalObject() { |
| 323 | return IsHeapObject() && |
| 324 | ((HeapObject::cast(this)->map()->instance_type() == |
| 325 | JS_GLOBAL_OBJECT_TYPE) || |
| 326 | (HeapObject::cast(this)->map()->instance_type() == |
| 327 | JS_BUILTINS_OBJECT_TYPE)); |
| 328 | } |
| 329 | |
| 330 | |
| 331 | bool Object::IsJSGlobalObject() { |
| 332 | #ifdef DEBUG |
| 333 | if (IsHeapObject() && |
| 334 | (HeapObject::cast(this)->map()->instance_type() == |
| 335 | JS_GLOBAL_OBJECT_TYPE)) { |
| 336 | ASSERT(IsAccessCheckNeeded()); |
| 337 | } |
| 338 | #endif |
| 339 | return IsHeapObject() && |
| 340 | (HeapObject::cast(this)->map()->instance_type() == |
| 341 | JS_GLOBAL_OBJECT_TYPE); |
| 342 | } |
| 343 | |
| 344 | |
| 345 | bool Object::IsJSBuiltinsObject() { |
| 346 | return IsHeapObject() && |
| 347 | (HeapObject::cast(this)->map()->instance_type() == |
| 348 | JS_BUILTINS_OBJECT_TYPE); |
| 349 | } |
| 350 | |
| 351 | |
| 352 | bool Object::IsUndetectableObject() { |
| 353 | return IsHeapObject() |
| 354 | && HeapObject::cast(this)->map()->is_undetectable(); |
| 355 | } |
| 356 | |
| 357 | |
| 358 | bool Object::IsAccessCheckNeeded() { |
| 359 | return IsHeapObject() |
| 360 | && HeapObject::cast(this)->map()->needs_access_check(); |
| 361 | } |
| 362 | |
| 363 | |
| 364 | bool Object::IsStruct() { |
| 365 | if (!IsHeapObject()) return false; |
| 366 | switch (HeapObject::cast(this)->map()->instance_type()) { |
| 367 | #define MAKE_STRUCT_CASE(NAME, Name, name) case NAME##_TYPE: return true; |
| 368 | STRUCT_LIST(MAKE_STRUCT_CASE) |
| 369 | #undef MAKE_STRUCT_CASE |
| 370 | default: return false; |
| 371 | } |
| 372 | } |
| 373 | |
| 374 | |
| 375 | #define MAKE_STRUCT_PREDICATE(NAME, Name, name) \ |
| 376 | bool Object::Is##Name() { \ |
| 377 | return Object::IsHeapObject() \ |
| 378 | && HeapObject::cast(this)->map()->instance_type() == NAME##_TYPE; \ |
| 379 | } |
| 380 | STRUCT_LIST(MAKE_STRUCT_PREDICATE) |
| 381 | #undef MAKE_STRUCT_PREDICATE |
| 382 | |
| 383 | |
| 384 | bool Object::IsUndefined() { |
| 385 | return this == Heap::undefined_value(); |
| 386 | } |
| 387 | |
| 388 | |
| 389 | bool Object::IsTheHole() { |
| 390 | return this == Heap::the_hole_value(); |
| 391 | } |
| 392 | |
| 393 | |
| 394 | bool Object::IsNull() { |
| 395 | return this == Heap::null_value(); |
| 396 | } |
| 397 | |
| 398 | |
| 399 | bool Object::IsTrue() { |
| 400 | return this == Heap::true_value(); |
| 401 | } |
| 402 | |
| 403 | |
| 404 | bool Object::IsFalse() { |
| 405 | return this == Heap::false_value(); |
| 406 | } |
| 407 | |
| 408 | |
| 409 | double Object::Number() { |
| 410 | ASSERT(IsNumber()); |
| 411 | return IsSmi() |
| 412 | ? static_cast<double>(reinterpret_cast<Smi*>(this)->value()) |
| 413 | : reinterpret_cast<HeapNumber*>(this)->value(); |
| 414 | } |
| 415 | |
| 416 | |
| 417 | |
| 418 | Object* Object::ToSmi() { |
| 419 | if (IsSmi()) return this; |
| 420 | if (IsHeapNumber()) { |
| 421 | double value = HeapNumber::cast(this)->value(); |
| 422 | int int_value = FastD2I(value); |
| 423 | if (value == FastI2D(int_value) && Smi::IsValid(int_value)) { |
| 424 | return Smi::FromInt(int_value); |
| 425 | } |
| 426 | } |
| 427 | return Failure::Exception(); |
| 428 | } |
| 429 | |
| 430 | |
| 431 | Object* Object::GetElement(uint32_t index) { |
| 432 | return GetElementWithReceiver(this, index); |
| 433 | } |
| 434 | |
| 435 | |
| 436 | Object* Object::GetProperty(String* key) { |
| 437 | PropertyAttributes attributes; |
| 438 | return GetPropertyWithReceiver(this, key, &attributes); |
| 439 | } |
| 440 | |
| 441 | |
| 442 | Object* Object::GetProperty(String* key, PropertyAttributes* attributes) { |
| 443 | return GetPropertyWithReceiver(this, key, attributes); |
| 444 | } |
| 445 | |
| 446 | |
| 447 | #define FIELD_ADDR(p, offset) \ |
| 448 | (reinterpret_cast<byte*>(p) + offset - kHeapObjectTag) |
| 449 | |
| 450 | #define READ_FIELD(p, offset) \ |
| 451 | (*reinterpret_cast<Object**>(FIELD_ADDR(p, offset))) |
| 452 | |
| 453 | #define WRITE_FIELD(p, offset, value) \ |
| 454 | (*reinterpret_cast<Object**>(FIELD_ADDR(p, offset)) = value) |
| 455 | |
| 456 | #define WRITE_BARRIER(object, offset) \ |
| 457 | Heap::RecordWrite(object->address(), offset); |
| 458 | |
| 459 | #define READ_DOUBLE_FIELD(p, offset) \ |
| 460 | (*reinterpret_cast<double*>(FIELD_ADDR(p, offset))) |
| 461 | |
| 462 | #define WRITE_DOUBLE_FIELD(p, offset, value) \ |
| 463 | (*reinterpret_cast<double*>(FIELD_ADDR(p, offset)) = value) |
| 464 | |
| 465 | #define READ_INT_FIELD(p, offset) \ |
| 466 | (*reinterpret_cast<int*>(FIELD_ADDR(p, offset))) |
| 467 | |
| 468 | #define WRITE_INT_FIELD(p, offset, value) \ |
| 469 | (*reinterpret_cast<int*>(FIELD_ADDR(p, offset)) = value) |
| 470 | |
| 471 | #define READ_SHORT_FIELD(p, offset) \ |
| 472 | (*reinterpret_cast<uint16_t*>(FIELD_ADDR(p, offset))) |
| 473 | |
| 474 | #define WRITE_SHORT_FIELD(p, offset, value) \ |
| 475 | (*reinterpret_cast<uint16_t*>(FIELD_ADDR(p, offset)) = value) |
| 476 | |
| 477 | #define READ_BYTE_FIELD(p, offset) \ |
| 478 | (*reinterpret_cast<byte*>(FIELD_ADDR(p, offset))) |
| 479 | |
| 480 | #define WRITE_BYTE_FIELD(p, offset, value) \ |
| 481 | (*reinterpret_cast<byte*>(FIELD_ADDR(p, offset)) = value) |
| 482 | |
| 483 | |
| 484 | Object* HeapObject::GetHeapObjectField(HeapObject* obj, int index) { |
| 485 | return READ_FIELD(obj, HeapObject::kSize + kPointerSize * index); |
| 486 | } |
| 487 | |
| 488 | |
| 489 | int Smi::value() { |
| 490 | return reinterpret_cast<int>(this) >> kSmiTagSize; |
| 491 | } |
| 492 | |
| 493 | |
| 494 | Smi* Smi::FromInt(int value) { |
| 495 | ASSERT(Smi::IsValid(value)); |
| 496 | return reinterpret_cast<Smi*>((value << kSmiTagSize) | kSmiTag); |
| 497 | } |
| 498 | |
| 499 | |
| 500 | Failure::Type Failure::type() const { |
| 501 | return static_cast<Type>(value() & kFailureTypeTagMask); |
| 502 | } |
| 503 | |
| 504 | |
| 505 | bool Failure::IsInternalError() const { |
| 506 | return type() == INTERNAL_ERROR; |
| 507 | } |
| 508 | |
| 509 | |
| 510 | bool Failure::IsOutOfMemoryException() const { |
| 511 | return type() == OUT_OF_MEMORY_EXCEPTION; |
| 512 | } |
| 513 | |
| 514 | |
| 515 | int Failure::requested() const { |
| 516 | const int kShiftBits = |
| 517 | kFailureTypeTagSize + kSpaceTagSize - kObjectAlignmentBits; |
| 518 | STATIC_ASSERT(kShiftBits >= 0); |
| 519 | ASSERT(type() == RETRY_AFTER_GC); |
| 520 | return value() >> kShiftBits; |
| 521 | } |
| 522 | |
| 523 | |
| 524 | AllocationSpace Failure::allocation_space() const { |
| 525 | ASSERT_EQ(RETRY_AFTER_GC, type()); |
| 526 | return static_cast<AllocationSpace>((value() >> kFailureTypeTagSize) |
| 527 | & kSpaceTagMask); |
| 528 | } |
| 529 | |
| 530 | |
| 531 | Failure* Failure::InternalError() { |
| 532 | return Construct(INTERNAL_ERROR); |
| 533 | } |
| 534 | |
| 535 | |
| 536 | Failure* Failure::Exception() { |
| 537 | return Construct(EXCEPTION); |
| 538 | } |
| 539 | |
| 540 | Failure* Failure::OutOfMemoryException() { |
| 541 | return Construct(OUT_OF_MEMORY_EXCEPTION); |
| 542 | } |
| 543 | |
| 544 | |
| 545 | int Failure::value() const { |
| 546 | return reinterpret_cast<int>(this) >> kFailureTagSize; |
| 547 | } |
| 548 | |
| 549 | |
| 550 | Failure* Failure::Construct(Type type, int value) { |
| 551 | int info = (value << kFailureTypeTagSize) | type; |
| 552 | ASSERT(Smi::IsValid(info)); // Same validation check as in Smi |
| 553 | return reinterpret_cast<Failure*>((info << kFailureTagSize) | kFailureTag); |
| 554 | } |
| 555 | |
| 556 | |
| 557 | bool Smi::IsValid(int value) { |
| 558 | #ifdef DEBUG |
| 559 | bool in_range = (value >= kMinValue) && (value <= kMaxValue); |
| 560 | #endif |
| 561 | // To be representable as an tagged small integer, the two |
| 562 | // most-significant bits of 'value' must be either 00 or 11 due to |
| 563 | // sign-extension. To check this we add 01 to the two |
| 564 | // most-significant bits, and check if the most-significant bit is 0 |
| 565 | // |
| 566 | // CAUTION: The original code below: |
| 567 | // bool result = ((value + 0x40000000) & 0x80000000) == 0; |
| 568 | // may lead to incorrect results according to the C language spec, and |
| 569 | // in fact doesn't work correctly with gcc4.1.1 in some cases: The |
| 570 | // compiler may produce undefined results in case of signed integer |
| 571 | // overflow. The computation must be done w/ unsigned ints. |
| 572 | bool result = |
| 573 | ((static_cast<unsigned int>(value) + 0x40000000U) & 0x80000000U) == 0; |
| 574 | ASSERT(result == in_range); |
| 575 | return result; |
| 576 | } |
| 577 | |
| 578 | |
| 579 | #ifdef DEBUG |
| 580 | void HeapObject::VerifyObjectField(int offset) { |
| 581 | VerifyPointer(READ_FIELD(this, offset)); |
| 582 | } |
| 583 | #endif |
| 584 | |
| 585 | |
| 586 | Map* HeapObject::map() { |
| 587 | return reinterpret_cast<Map*> READ_FIELD(this, kMapOffset); |
| 588 | } |
| 589 | |
| 590 | |
| 591 | void HeapObject::set_map(Map* value) { |
| 592 | WRITE_FIELD(this, kMapOffset, value); |
| 593 | } |
| 594 | |
| 595 | |
| 596 | |
| 597 | |
| 598 | HeapObject* HeapObject::FromAddress(Address address) { |
| 599 | ASSERT_TAG_ALIGNED(address); |
| 600 | return reinterpret_cast<HeapObject*>(address + kHeapObjectTag); |
| 601 | } |
| 602 | |
| 603 | |
| 604 | Address HeapObject::address() { |
| 605 | return reinterpret_cast<Address>(this) - kHeapObjectTag; |
| 606 | } |
| 607 | |
| 608 | |
| 609 | int HeapObject::Size() { |
| 610 | return SizeFromMap(map()); |
| 611 | } |
| 612 | |
| 613 | |
| 614 | void HeapObject::IteratePointers(ObjectVisitor* v, int start, int end) { |
| 615 | v->VisitPointers(reinterpret_cast<Object**>(FIELD_ADDR(this, start)), |
| 616 | reinterpret_cast<Object**>(FIELD_ADDR(this, end))); |
| 617 | } |
| 618 | |
| 619 | |
| 620 | void HeapObject::IteratePointer(ObjectVisitor* v, int offset) { |
| 621 | v->VisitPointer(reinterpret_cast<Object**>(FIELD_ADDR(this, offset))); |
| 622 | } |
| 623 | |
| 624 | |
| 625 | void HeapObject::CopyBody(JSObject* from) { |
| 626 | ASSERT(map() == from->map()); |
| 627 | ASSERT(Size() == from->Size()); |
| 628 | int object_size = Size(); |
| 629 | for (int offset = kSize; offset < object_size; offset += kPointerSize) { |
| 630 | Object* value = READ_FIELD(from, offset); |
| 631 | // Note: WRITE_FIELD does not update the write barrier. |
| 632 | WRITE_FIELD(this, offset, value); |
| 633 | WRITE_BARRIER(this, offset); |
| 634 | } |
| 635 | } |
| 636 | |
| 637 | |
| 638 | double HeapNumber::value() { |
| 639 | return READ_DOUBLE_FIELD(this, kValueOffset); |
| 640 | } |
| 641 | |
| 642 | |
| 643 | void HeapNumber::set_value(double value) { |
| 644 | WRITE_DOUBLE_FIELD(this, kValueOffset, value); |
| 645 | } |
| 646 | |
| 647 | |
| 648 | ACCESSORS(JSObject, properties, FixedArray, kPropertiesOffset) |
| 649 | ACCESSORS(JSObject, elements, HeapObject, kElementsOffset) |
| 650 | |
| 651 | |
| 652 | void JSObject::initialize_properties() { |
| 653 | ASSERT(!Heap::InNewSpace(Heap::empty_fixed_array())); |
| 654 | WRITE_FIELD(this, kPropertiesOffset, Heap::empty_fixed_array()); |
| 655 | } |
| 656 | |
| 657 | |
| 658 | void JSObject::initialize_elements() { |
| 659 | ASSERT(!Heap::InNewSpace(Heap::empty_fixed_array())); |
| 660 | WRITE_FIELD(this, kElementsOffset, Heap::empty_fixed_array()); |
| 661 | } |
| 662 | |
| 663 | |
| 664 | ACCESSORS(Oddball, to_string, String, kToStringOffset) |
| 665 | ACCESSORS(Oddball, to_number, Object, kToNumberOffset) |
| 666 | |
| 667 | |
| 668 | int JSObject::GetHeaderSize() { |
| 669 | switch (map()->instance_type()) { |
| 670 | case JS_GLOBAL_OBJECT_TYPE: |
| 671 | return JSGlobalObject::kSize; |
| 672 | case JS_BUILTINS_OBJECT_TYPE: |
| 673 | return JSBuiltinsObject::kSize; |
| 674 | case JS_FUNCTION_TYPE: |
| 675 | return JSFunction::kSize; |
| 676 | case JS_VALUE_TYPE: |
| 677 | return JSValue::kSize; |
| 678 | case JS_ARRAY_TYPE: |
| 679 | return JSValue::kSize; |
| 680 | case JS_OBJECT_TYPE: |
| 681 | return JSObject::kHeaderSize; |
| 682 | default: |
| 683 | UNREACHABLE(); |
| 684 | return 0; |
| 685 | } |
| 686 | } |
| 687 | |
| 688 | |
| 689 | int JSObject::GetInternalFieldCount() { |
| 690 | ASSERT(1 << kPointerSizeLog2 == kPointerSize); |
| 691 | return (Size() - GetHeaderSize()) >> kPointerSizeLog2; |
| 692 | } |
| 693 | |
| 694 | |
| 695 | Object* JSObject::GetInternalField(int index) { |
| 696 | ASSERT(index < GetInternalFieldCount() && index >= 0); |
| 697 | return READ_FIELD(this, GetHeaderSize() + (kPointerSize * index)); |
| 698 | } |
| 699 | |
| 700 | |
| 701 | void JSObject::SetInternalField(int index, Object* value) { |
| 702 | ASSERT(index < GetInternalFieldCount() && index >= 0); |
| 703 | int offset = GetHeaderSize() + (kPointerSize * index); |
| 704 | WRITE_FIELD(this, offset, value); |
| 705 | WRITE_BARRIER(this, offset); |
| 706 | } |
| 707 | |
| 708 | |
| 709 | void JSObject::InitializeBody(int object_size) { |
| 710 | for (int offset = kHeaderSize; offset < object_size; offset += kPointerSize) { |
| 711 | WRITE_FIELD(this, offset, Heap::undefined_value()); |
| 712 | } |
| 713 | } |
| 714 | |
| 715 | |
| 716 | void Struct::InitializeBody(int object_size) { |
| 717 | for (int offset = kSize; offset < object_size; offset += kPointerSize) { |
| 718 | WRITE_FIELD(this, offset, Heap::undefined_value()); |
| 719 | } |
| 720 | } |
| 721 | |
| 722 | |
| 723 | bool JSObject::HasFastProperties() { |
| 724 | return !properties()->IsDictionary(); |
| 725 | } |
| 726 | |
| 727 | |
| 728 | bool Array::IndexFromObject(Object* object, uint32_t* index) { |
| 729 | if (object->IsSmi()) { |
| 730 | int value = Smi::cast(object)->value(); |
| 731 | if (value < 0) return false; |
| 732 | *index = value; |
| 733 | return true; |
| 734 | } |
| 735 | if (object->IsHeapNumber()) { |
| 736 | double value = HeapNumber::cast(object)->value(); |
| 737 | uint32_t uint_value = static_cast<uint32_t>(value); |
| 738 | if (value == static_cast<double>(uint_value)) { |
| 739 | *index = uint_value; |
| 740 | return true; |
| 741 | } |
| 742 | } |
| 743 | return false; |
| 744 | } |
| 745 | |
| 746 | |
| 747 | bool Object::IsStringObjectWithCharacterAt(uint32_t index) { |
| 748 | if (!this->IsJSValue()) return false; |
| 749 | |
| 750 | JSValue* js_value = JSValue::cast(this); |
| 751 | if (!js_value->value()->IsString()) return false; |
| 752 | |
| 753 | String* str = String::cast(js_value->value()); |
| 754 | if (index >= (uint32_t)str->length()) return false; |
| 755 | |
| 756 | return true; |
| 757 | } |
| 758 | |
| 759 | |
| 760 | Object* FixedArray::get(int index) { |
| 761 | ASSERT(index >= 0 && index < this->length()); |
| 762 | return READ_FIELD(this, kHeaderSize + index * kPointerSize); |
| 763 | } |
| 764 | |
| 765 | |
| 766 | void FixedArray::set(int index, Object* value) { |
| 767 | ASSERT(index >= 0 && index < this->length()); |
| 768 | int offset = kHeaderSize + index * kPointerSize; |
| 769 | WRITE_FIELD(this, offset, value); |
| 770 | WRITE_BARRIER(this, offset); |
| 771 | } |
| 772 | |
| 773 | |
| 774 | FixedArray::WriteBarrierMode FixedArray::GetWriteBarrierMode() { |
| 775 | if (Heap::InNewSpace(this)) return SKIP_WRITE_BARRIER; |
| 776 | return UPDATE_WRITE_BARRIER; |
| 777 | } |
| 778 | |
| 779 | |
| 780 | void FixedArray::set(int index, |
| 781 | Object* value, |
| 782 | FixedArray::WriteBarrierMode mode) { |
| 783 | ASSERT(index >= 0 && index < this->length()); |
| 784 | int offset = kHeaderSize + index * kPointerSize; |
| 785 | WRITE_FIELD(this, offset, value); |
| 786 | if (mode == UPDATE_WRITE_BARRIER) { |
| 787 | WRITE_BARRIER(this, offset); |
| 788 | } else { |
| 789 | ASSERT(mode == SKIP_WRITE_BARRIER); |
| 790 | ASSERT(Heap::InNewSpace(this) || !Heap::InNewSpace(value)); |
| 791 | } |
| 792 | } |
| 793 | |
| 794 | |
| 795 | void FixedArray::fast_set(FixedArray* array, int index, Object* value) { |
| 796 | ASSERT(index >= 0 && index < array->length()); |
| 797 | WRITE_FIELD(array, kHeaderSize + index * kPointerSize, value); |
| 798 | } |
| 799 | |
| 800 | |
| 801 | void FixedArray::set_undefined(int index) { |
| 802 | ASSERT(index >= 0 && index < this->length()); |
| 803 | ASSERT(!Heap::InNewSpace(Heap::undefined_value())); |
| 804 | WRITE_FIELD(this, kHeaderSize + index * kPointerSize, |
| 805 | Heap::undefined_value()); |
| 806 | } |
| 807 | |
| 808 | |
| 809 | void FixedArray::set_the_hole(int index) { |
| 810 | ASSERT(index >= 0 && index < this->length()); |
| 811 | ASSERT(!Heap::InNewSpace(Heap::the_hole_value())); |
| 812 | WRITE_FIELD(this, kHeaderSize + index * kPointerSize, Heap::the_hole_value()); |
| 813 | } |
| 814 | |
| 815 | |
| 816 | void DescriptorArray::fast_swap(FixedArray* array, int first, int second) { |
| 817 | Object* tmp = array->get(first); |
| 818 | fast_set(array, first, array->get(second)); |
| 819 | fast_set(array, second, tmp); |
| 820 | } |
| 821 | |
| 822 | |
| 823 | int DescriptorArray::Search(String* name) { |
| 824 | SLOW_ASSERT(IsSortedNoDuplicates()); |
| 825 | |
| 826 | // Check for empty descriptor array. |
| 827 | int nof = number_of_descriptors(); |
| 828 | if (nof == 0) return kNotFound; |
| 829 | |
| 830 | // Fast case: do linear search for small arrays. |
| 831 | const int kMaxElementsForLinearSearch = 8; |
| 832 | if (name->IsSymbol() && nof < kMaxElementsForLinearSearch) { |
| 833 | for (int number = 0; number < nof; number++) { |
| 834 | if (name == GetKey(number)) return number; |
| 835 | } |
| 836 | return kNotFound; |
| 837 | } |
| 838 | |
| 839 | // Slow case: perform binary search. |
| 840 | return BinarySearch(name, 0, nof - 1); |
| 841 | } |
| 842 | |
| 843 | |
| 844 | |
| 845 | String* DescriptorArray::GetKey(int descriptor_number) { |
| 846 | ASSERT(descriptor_number < number_of_descriptors()); |
| 847 | return String::cast(get(ToKeyIndex(descriptor_number))); |
| 848 | } |
| 849 | |
| 850 | |
| 851 | Object* DescriptorArray::GetValue(int descriptor_number) { |
| 852 | ASSERT(descriptor_number < number_of_descriptors()); |
| 853 | return GetContentArray()->get(ToValueIndex(descriptor_number)); |
| 854 | } |
| 855 | |
| 856 | |
| 857 | Smi* DescriptorArray::GetDetails(int descriptor_number) { |
| 858 | ASSERT(descriptor_number < number_of_descriptors()); |
| 859 | return Smi::cast(GetContentArray()->get(ToDetailsIndex(descriptor_number))); |
| 860 | } |
| 861 | |
| 862 | |
| 863 | void DescriptorArray::Get(int descriptor_number, Descriptor* desc) { |
| 864 | desc->Init(GetKey(descriptor_number), |
| 865 | GetValue(descriptor_number), |
| 866 | GetDetails(descriptor_number)); |
| 867 | } |
| 868 | |
| 869 | |
| 870 | void DescriptorArray::Set(int descriptor_number, Descriptor* desc) { |
| 871 | // Range check. |
| 872 | ASSERT(descriptor_number < number_of_descriptors()); |
| 873 | |
| 874 | // Make sure non of the elements in desc are in new space. |
| 875 | ASSERT(!Heap::InNewSpace(desc->GetKey())); |
| 876 | ASSERT(!Heap::InNewSpace(desc->GetValue())); |
| 877 | |
| 878 | fast_set(this, ToKeyIndex(descriptor_number), desc->GetKey()); |
| 879 | FixedArray* content_array = GetContentArray(); |
| 880 | fast_set(content_array, ToValueIndex(descriptor_number), desc->GetValue()); |
| 881 | fast_set(content_array, ToDetailsIndex(descriptor_number), |
| 882 | desc->GetDetails().AsSmi()); |
| 883 | } |
| 884 | |
| 885 | |
| 886 | void DescriptorArray::Swap(int first, int second) { |
| 887 | fast_swap(this, ToKeyIndex(first), ToKeyIndex(second)); |
| 888 | FixedArray* content_array = GetContentArray(); |
| 889 | fast_swap(content_array, ToValueIndex(first), ToValueIndex(second)); |
| 890 | fast_swap(content_array, ToDetailsIndex(first), ToDetailsIndex(second)); |
| 891 | } |
| 892 | |
| 893 | |
| 894 | bool Dictionary::requires_slow_elements() { |
| 895 | Object* max_index_object = get(kPrefixStartIndex); |
| 896 | if (!max_index_object->IsSmi()) return false; |
| 897 | return 0 != |
| 898 | (Smi::cast(max_index_object)->value() & kRequiresSlowElementsMask); |
| 899 | } |
| 900 | |
| 901 | |
| 902 | uint32_t Dictionary::max_number_key() { |
| 903 | ASSERT(!requires_slow_elements()); |
| 904 | Object* max_index_object = get(kPrefixStartIndex); |
| 905 | if (!max_index_object->IsSmi()) return 0; |
| 906 | uint32_t value = static_cast<uint32_t>(Smi::cast(max_index_object)->value()); |
| 907 | return value >> kRequiresSlowElementsTagSize; |
| 908 | } |
| 909 | |
| 910 | |
| 911 | // ------------------------------------ |
| 912 | // Cast operations |
| 913 | |
| 914 | |
| 915 | CAST_ACCESSOR(FixedArray) |
| 916 | CAST_ACCESSOR(DescriptorArray) |
| 917 | CAST_ACCESSOR(Dictionary) |
| 918 | CAST_ACCESSOR(SymbolTable) |
| 919 | CAST_ACCESSOR(String) |
| 920 | CAST_ACCESSOR(SeqString) |
| 921 | CAST_ACCESSOR(AsciiString) |
| 922 | CAST_ACCESSOR(TwoByteString) |
| 923 | CAST_ACCESSOR(ConsString) |
| 924 | CAST_ACCESSOR(SlicedString) |
| 925 | CAST_ACCESSOR(ExternalString) |
| 926 | CAST_ACCESSOR(ExternalAsciiString) |
| 927 | CAST_ACCESSOR(ExternalTwoByteString) |
| 928 | CAST_ACCESSOR(JSObject) |
| 929 | CAST_ACCESSOR(Smi) |
| 930 | CAST_ACCESSOR(Failure) |
| 931 | CAST_ACCESSOR(HeapObject) |
| 932 | CAST_ACCESSOR(HeapNumber) |
| 933 | CAST_ACCESSOR(Oddball) |
| 934 | CAST_ACCESSOR(SharedFunctionInfo) |
| 935 | CAST_ACCESSOR(Map) |
| 936 | CAST_ACCESSOR(JSFunction) |
| 937 | CAST_ACCESSOR(JSGlobalObject) |
| 938 | CAST_ACCESSOR(JSBuiltinsObject) |
| 939 | CAST_ACCESSOR(Code) |
| 940 | CAST_ACCESSOR(JSArray) |
| 941 | CAST_ACCESSOR(Proxy) |
| 942 | CAST_ACCESSOR(ByteArray) |
| 943 | CAST_ACCESSOR(Struct) |
| 944 | |
| 945 | |
| 946 | #define MAKE_STRUCT_CAST(NAME, Name, name) CAST_ACCESSOR(Name) |
| 947 | STRUCT_LIST(MAKE_STRUCT_CAST) |
| 948 | #undef MAKE_STRUCT_CAST |
| 949 | |
| 950 | template <int prefix_size, int elem_size> |
| 951 | HashTable<prefix_size, elem_size>* HashTable<prefix_size, elem_size>::cast( |
| 952 | Object* obj) { |
| 953 | ASSERT(obj->IsHashTable()); |
| 954 | return reinterpret_cast<HashTable*>(obj); |
| 955 | } |
| 956 | |
| 957 | |
| 958 | INT_ACCESSORS(Array, length, kLengthOffset) |
| 959 | |
| 960 | |
| 961 | bool String::Equals(String* other) { |
| 962 | if (other == this) return true; |
| 963 | if (IsSymbol() && other->IsSymbol()) return false; |
| 964 | return SlowEquals(other); |
| 965 | } |
| 966 | |
| 967 | |
| 968 | int String::length() { |
| 969 | uint32_t len = READ_INT_FIELD(this, kLengthOffset); |
| 970 | |
| 971 | switch (size_tag()) { |
| 972 | case kShortStringTag: |
| 973 | return len >> kShortLengthShift; |
| 974 | case kMediumStringTag: |
| 975 | return len >> kMediumLengthShift; |
| 976 | case kLongStringTag: |
| 977 | return len >> kLongLengthShift; |
| 978 | default: |
| 979 | break; |
| 980 | } |
| 981 | UNREACHABLE(); |
| 982 | return 0; |
| 983 | } |
| 984 | |
| 985 | |
| 986 | void String::set_length(int value) { |
| 987 | switch (size_tag()) { |
| 988 | case kShortStringTag: |
| 989 | WRITE_INT_FIELD(this, kLengthOffset, value << kShortLengthShift); |
| 990 | break; |
| 991 | case kMediumStringTag: |
| 992 | WRITE_INT_FIELD(this, kLengthOffset, value << kMediumLengthShift); |
| 993 | break; |
| 994 | case kLongStringTag: |
| 995 | WRITE_INT_FIELD(this, kLengthOffset, value << kLongLengthShift); |
| 996 | break; |
| 997 | default: |
| 998 | UNREACHABLE(); |
| 999 | break; |
| 1000 | } |
| 1001 | } |
| 1002 | |
| 1003 | |
| 1004 | int String::length_field() { |
| 1005 | return READ_INT_FIELD(this, kLengthOffset); |
| 1006 | } |
| 1007 | |
| 1008 | |
| 1009 | void String::set_length_field(int value) { |
| 1010 | WRITE_INT_FIELD(this, kLengthOffset, value); |
| 1011 | } |
| 1012 | |
| 1013 | |
| 1014 | void String::TryFlatten() { |
| 1015 | Flatten(); |
| 1016 | } |
| 1017 | |
| 1018 | |
| 1019 | uint16_t String::Get(int index) { |
| 1020 | ASSERT(index >= 0 && index < length()); |
| 1021 | switch (representation_tag()) { |
| 1022 | case kSeqStringTag: |
| 1023 | return is_ascii() |
| 1024 | ? AsciiString::cast(this)->AsciiStringGet(index) |
| 1025 | : TwoByteString::cast(this)->TwoByteStringGet(index); |
| 1026 | case kConsStringTag: |
| 1027 | return ConsString::cast(this)->ConsStringGet(index); |
| 1028 | case kSlicedStringTag: |
| 1029 | return SlicedString::cast(this)->SlicedStringGet(index); |
| 1030 | case kExternalStringTag: |
| 1031 | return is_ascii() |
| 1032 | ? ExternalAsciiString::cast(this)->ExternalAsciiStringGet(index) |
| 1033 | : ExternalTwoByteString::cast(this)->ExternalTwoByteStringGet(index); |
| 1034 | default: |
| 1035 | break; |
| 1036 | } |
| 1037 | |
| 1038 | UNREACHABLE(); |
| 1039 | return 0; |
| 1040 | } |
| 1041 | |
| 1042 | |
| 1043 | void String::Set(int index, uint16_t value) { |
| 1044 | ASSERT(index >= 0 && index < length()); |
| 1045 | ASSERT(IsSeqString()); |
| 1046 | |
| 1047 | return is_ascii() |
| 1048 | ? AsciiString::cast(this)->AsciiStringSet(index, value) |
| 1049 | : TwoByteString::cast(this)->TwoByteStringSet(index, value); |
| 1050 | } |
| 1051 | |
| 1052 | |
| 1053 | bool String::IsAscii() { |
| 1054 | return is_ascii(); |
| 1055 | } |
| 1056 | |
| 1057 | |
| 1058 | bool String::StringIsConsString() { |
| 1059 | return representation_tag() == kConsStringTag; |
| 1060 | } |
| 1061 | |
| 1062 | |
| 1063 | bool String::StringIsSlicedString() { |
| 1064 | return representation_tag() == kSlicedStringTag; |
| 1065 | } |
| 1066 | |
| 1067 | |
| 1068 | uint32_t String::size_tag() { |
| 1069 | return map_size_tag(map()); |
| 1070 | } |
| 1071 | |
| 1072 | |
| 1073 | uint32_t String::map_size_tag(Map* map) { |
| 1074 | return map->instance_type() & kStringSizeMask; |
| 1075 | } |
| 1076 | |
| 1077 | |
| 1078 | bool String::is_symbol() { |
| 1079 | return is_symbol_map(map()); |
| 1080 | } |
| 1081 | |
| 1082 | |
| 1083 | bool String::is_symbol_map(Map* map) { |
| 1084 | return (map->instance_type() & kIsSymbolMask) != 0; |
| 1085 | } |
| 1086 | |
| 1087 | |
| 1088 | bool String::is_ascii() { |
| 1089 | return is_ascii_map(map()); |
| 1090 | } |
| 1091 | |
| 1092 | |
| 1093 | bool String::is_ascii_map(Map* map) { |
| 1094 | return (map->instance_type() & kStringEncodingMask) != 0; |
| 1095 | } |
| 1096 | |
| 1097 | |
| 1098 | StringRepresentationTag String::representation_tag() { |
| 1099 | return map_representation_tag(map()); |
| 1100 | } |
| 1101 | |
| 1102 | |
| 1103 | StringRepresentationTag String::map_representation_tag(Map* map) { |
| 1104 | uint32_t tag = map->instance_type() & kStringRepresentationMask; |
| 1105 | return static_cast<StringRepresentationTag>(tag); |
| 1106 | } |
| 1107 | |
| 1108 | |
| 1109 | bool String::IsFlat() { |
| 1110 | String* current = this; |
| 1111 | while (true) { |
| 1112 | switch (current->representation_tag()) { |
| 1113 | case kConsStringTag: |
| 1114 | return String::cast(ConsString::cast(current)->second())->length() == 0; |
| 1115 | case kSlicedStringTag: |
| 1116 | current = String::cast(SlicedString::cast(this)->buffer()); |
| 1117 | break; |
| 1118 | default: |
| 1119 | return true; |
| 1120 | } |
| 1121 | } |
| 1122 | } |
| 1123 | |
| 1124 | |
| 1125 | uint16_t AsciiString::AsciiStringGet(int index) { |
| 1126 | ASSERT(index >= 0 && index < length()); |
| 1127 | return READ_BYTE_FIELD(this, kHeaderSize + index * kCharSize); |
| 1128 | } |
| 1129 | |
| 1130 | |
| 1131 | void AsciiString::AsciiStringSet(int index, uint16_t value) { |
| 1132 | ASSERT(index >= 0 && index < length() && value <= kMaxAsciiCharCode); |
| 1133 | WRITE_BYTE_FIELD(this, kHeaderSize + index * kCharSize, |
| 1134 | static_cast<byte>(value)); |
| 1135 | } |
| 1136 | |
| 1137 | |
| 1138 | Address AsciiString::GetCharsAddress() { |
| 1139 | return FIELD_ADDR(this, kHeaderSize); |
| 1140 | } |
| 1141 | |
| 1142 | |
| 1143 | uint16_t TwoByteString::TwoByteStringGet(int index) { |
| 1144 | ASSERT(index >= 0 && index < length()); |
| 1145 | return READ_SHORT_FIELD(this, kHeaderSize + index * kShortSize); |
| 1146 | } |
| 1147 | |
| 1148 | |
| 1149 | void TwoByteString::TwoByteStringSet(int index, uint16_t value) { |
| 1150 | ASSERT(index >= 0 && index < length()); |
| 1151 | WRITE_SHORT_FIELD(this, kHeaderSize + index * kShortSize, value); |
| 1152 | } |
| 1153 | |
| 1154 | |
| 1155 | int TwoByteString::TwoByteStringSize(Map* map) { |
| 1156 | uint32_t length = READ_INT_FIELD(this, kLengthOffset); |
| 1157 | |
| 1158 | // Use the map (and not 'this') to compute the size tag, since |
| 1159 | // TwoByteStringSize is called during GC when maps are encoded. |
| 1160 | switch (map_size_tag(map)) { |
| 1161 | case kShortStringTag: |
| 1162 | length = length >> kShortLengthShift; |
| 1163 | break; |
| 1164 | case kMediumStringTag: |
| 1165 | length = length >> kMediumLengthShift; |
| 1166 | break; |
| 1167 | case kLongStringTag: |
| 1168 | length = length >> kLongLengthShift; |
| 1169 | break; |
| 1170 | default: |
| 1171 | break; |
| 1172 | } |
| 1173 | return SizeFor(length); |
| 1174 | } |
| 1175 | |
| 1176 | |
| 1177 | int AsciiString::AsciiStringSize(Map* map) { |
| 1178 | uint32_t length = READ_INT_FIELD(this, kLengthOffset); |
| 1179 | |
| 1180 | // Use the map (and not 'this') to compute the size tag, since |
| 1181 | // AsciiStringSize is called during GC when maps are encoded. |
| 1182 | switch (map_size_tag(map)) { |
| 1183 | case kShortStringTag: |
| 1184 | length = length >> kShortLengthShift; |
| 1185 | break; |
| 1186 | case kMediumStringTag: |
| 1187 | length = length >> kMediumLengthShift; |
| 1188 | break; |
| 1189 | case kLongStringTag: |
| 1190 | length = length >> kLongLengthShift; |
| 1191 | break; |
| 1192 | default: |
| 1193 | break; |
| 1194 | } |
| 1195 | |
| 1196 | return SizeFor(length); |
| 1197 | } |
| 1198 | |
| 1199 | |
| 1200 | Object* ConsString::first() { |
| 1201 | return READ_FIELD(this, kFirstOffset); |
| 1202 | } |
| 1203 | |
| 1204 | |
| 1205 | void ConsString::set_first(Object* value) { |
| 1206 | WRITE_FIELD(this, kFirstOffset, value); |
| 1207 | WRITE_BARRIER(this, kFirstOffset); |
| 1208 | } |
| 1209 | |
| 1210 | |
| 1211 | Object* ConsString::second() { |
| 1212 | return READ_FIELD(this, kSecondOffset); |
| 1213 | } |
| 1214 | |
| 1215 | |
| 1216 | void ConsString::set_second(Object* value) { |
| 1217 | WRITE_FIELD(this, kSecondOffset, value); |
| 1218 | WRITE_BARRIER(this, kSecondOffset); |
| 1219 | } |
| 1220 | |
| 1221 | |
| 1222 | Object* SlicedString::buffer() { |
| 1223 | return READ_FIELD(this, kBufferOffset); |
| 1224 | } |
| 1225 | |
| 1226 | |
| 1227 | void SlicedString::set_buffer(Object* buffer) { |
| 1228 | WRITE_FIELD(this, kBufferOffset, buffer); |
| 1229 | WRITE_BARRIER(this, kBufferOffset); |
| 1230 | } |
| 1231 | |
| 1232 | |
| 1233 | int SlicedString::start() { |
| 1234 | return READ_INT_FIELD(this, kStartOffset); |
| 1235 | } |
| 1236 | |
| 1237 | |
| 1238 | void SlicedString::set_start(int start) { |
| 1239 | WRITE_INT_FIELD(this, kStartOffset, start); |
| 1240 | } |
| 1241 | |
| 1242 | |
| 1243 | ExternalAsciiString::Resource* ExternalAsciiString::resource() { |
| 1244 | return *reinterpret_cast<Resource**>(FIELD_ADDR(this, kResourceOffset)); |
| 1245 | } |
| 1246 | |
| 1247 | |
| 1248 | void ExternalAsciiString::set_resource( |
| 1249 | ExternalAsciiString::Resource* resource) { |
| 1250 | *reinterpret_cast<Resource**>(FIELD_ADDR(this, kResourceOffset)) = resource; |
| 1251 | } |
| 1252 | |
| 1253 | |
| 1254 | ExternalTwoByteString::Resource* ExternalTwoByteString::resource() { |
| 1255 | return *reinterpret_cast<Resource**>(FIELD_ADDR(this, kResourceOffset)); |
| 1256 | } |
| 1257 | |
| 1258 | |
| 1259 | void ExternalTwoByteString::set_resource( |
| 1260 | ExternalTwoByteString::Resource* resource) { |
| 1261 | *reinterpret_cast<Resource**>(FIELD_ADDR(this, kResourceOffset)) = resource; |
| 1262 | } |
| 1263 | |
| 1264 | |
| 1265 | byte ByteArray::get(int index) { |
| 1266 | ASSERT(index >= 0 && index < this->length()); |
| 1267 | return READ_BYTE_FIELD(this, kHeaderSize + index * kCharSize); |
| 1268 | } |
| 1269 | |
| 1270 | |
| 1271 | void ByteArray::set(int index, byte value) { |
| 1272 | ASSERT(index >= 0 && index < this->length()); |
| 1273 | WRITE_BYTE_FIELD(this, kHeaderSize + index * kCharSize, value); |
| 1274 | } |
| 1275 | |
| 1276 | |
| 1277 | int ByteArray::get_int(int index) { |
| 1278 | ASSERT(index >= 0 && (index * kIntSize) < this->length()); |
| 1279 | return READ_INT_FIELD(this, kHeaderSize + index * kIntSize); |
| 1280 | } |
| 1281 | |
| 1282 | |
| 1283 | ByteArray* ByteArray::FromDataStartAddress(Address address) { |
| 1284 | ASSERT_TAG_ALIGNED(address); |
| 1285 | return reinterpret_cast<ByteArray*>(address - kHeaderSize + kHeapObjectTag); |
| 1286 | } |
| 1287 | |
| 1288 | |
| 1289 | Address ByteArray::GetDataStartAddress() { |
| 1290 | return reinterpret_cast<Address>(this) - kHeapObjectTag + kHeaderSize; |
| 1291 | } |
| 1292 | |
| 1293 | |
| 1294 | int Map::instance_size() { |
| 1295 | return READ_BYTE_FIELD(this, kInstanceSizeOffset); |
| 1296 | } |
| 1297 | |
| 1298 | |
| 1299 | int HeapObject::SizeFromMap(Map* map) { |
| 1300 | InstanceType instance_type = map->instance_type(); |
| 1301 | // Only inline the two most frequent cases. |
| 1302 | if (instance_type == JS_OBJECT_TYPE) return map->instance_size(); |
| 1303 | if (instance_type == FIXED_ARRAY_TYPE) { |
| 1304 | return reinterpret_cast<FixedArray*>(this)->FixedArraySize(); |
| 1305 | } |
| 1306 | // Otherwise do the general size computation. |
| 1307 | return SlowSizeFromMap(map); |
| 1308 | } |
| 1309 | |
| 1310 | |
| 1311 | void Map::set_instance_size(int value) { |
| 1312 | ASSERT(0 <= value && value < 256); |
| 1313 | WRITE_BYTE_FIELD(this, kInstanceSizeOffset, static_cast<byte>(value)); |
| 1314 | } |
| 1315 | |
| 1316 | |
| 1317 | InstanceType Map::instance_type() { |
| 1318 | return static_cast<InstanceType>(READ_BYTE_FIELD(this, kInstanceTypeOffset)); |
| 1319 | } |
| 1320 | |
| 1321 | |
| 1322 | void Map::set_instance_type(InstanceType value) { |
| 1323 | ASSERT(0 <= value && value < 256); |
| 1324 | WRITE_BYTE_FIELD(this, kInstanceTypeOffset, value); |
| 1325 | } |
| 1326 | |
| 1327 | |
| 1328 | int Map::unused_property_fields() { |
| 1329 | return READ_BYTE_FIELD(this, kUnusedPropertyFieldsOffset); |
| 1330 | } |
| 1331 | |
| 1332 | |
| 1333 | void Map::set_unused_property_fields(int value) { |
| 1334 | WRITE_BYTE_FIELD(this, kUnusedPropertyFieldsOffset, Min(value, 255)); |
| 1335 | } |
| 1336 | |
| 1337 | |
| 1338 | byte Map::bit_field() { |
| 1339 | return READ_BYTE_FIELD(this, kBitFieldOffset); |
| 1340 | } |
| 1341 | |
| 1342 | |
| 1343 | void Map::set_bit_field(byte value) { |
| 1344 | WRITE_BYTE_FIELD(this, kBitFieldOffset, value); |
| 1345 | } |
| 1346 | |
| 1347 | |
| 1348 | void Map::set_non_instance_prototype(bool value) { |
| 1349 | if (value) { |
| 1350 | set_bit_field(bit_field() | (1 << kHasNonInstancePrototype)); |
| 1351 | } else { |
| 1352 | set_bit_field(bit_field() & ~(1 << kHasNonInstancePrototype)); |
| 1353 | } |
| 1354 | } |
| 1355 | |
| 1356 | |
| 1357 | bool Map::has_non_instance_prototype() { |
| 1358 | return ((1 << kHasNonInstancePrototype) & bit_field()) != 0; |
| 1359 | } |
| 1360 | |
| 1361 | |
| 1362 | Code::Flags Code::flags() { |
| 1363 | return static_cast<Flags>(READ_INT_FIELD(this, kFlagsOffset)); |
| 1364 | } |
| 1365 | |
| 1366 | |
| 1367 | void Code::set_flags(Code::Flags flags) { |
| 1368 | // Make sure that all call stubs have an arguments count. |
| 1369 | ASSERT(ExtractKindFromFlags(flags) != CALL_IC || |
| 1370 | ExtractArgumentsCountFromFlags(flags) >= 0); |
| 1371 | WRITE_INT_FIELD(this, kFlagsOffset, flags); |
| 1372 | } |
| 1373 | |
| 1374 | |
| 1375 | Code::Kind Code::kind() { |
| 1376 | return ExtractKindFromFlags(flags()); |
| 1377 | } |
| 1378 | |
| 1379 | |
| 1380 | InlineCacheState Code::state() { |
| 1381 | InlineCacheState result = ExtractStateFromFlags(flags()); |
| 1382 | // Only allow uninitialized or debugger states for non-IC code |
| 1383 | // objects. This is used in the debugger to determine whether or not |
| 1384 | // a call to code object has been replaced with a debug break call. |
| 1385 | ASSERT(is_inline_cache_stub() || |
| 1386 | result == UNINITIALIZED || |
| 1387 | result == DEBUG_BREAK || |
| 1388 | result == DEBUG_PREPARE_STEP_IN); |
| 1389 | return result; |
| 1390 | } |
| 1391 | |
| 1392 | |
| 1393 | PropertyType Code::type() { |
| 1394 | ASSERT(state() == MONOMORPHIC); |
| 1395 | return ExtractTypeFromFlags(flags()); |
| 1396 | } |
| 1397 | |
| 1398 | |
| 1399 | int Code::arguments_count() { |
| 1400 | ASSERT(is_call_stub() || kind() == STUB); |
| 1401 | return ExtractArgumentsCountFromFlags(flags()); |
| 1402 | } |
| 1403 | |
| 1404 | |
| 1405 | CodeStub::Major Code::major_key() { |
| 1406 | // TODO(1238541): Simplify this somewhat complicated encoding. |
| 1407 | ASSERT(kind() == STUB); |
| 1408 | int low = ExtractStateFromFlags(flags()); |
| 1409 | int high = ExtractTypeFromFlags(flags()); |
| 1410 | return static_cast<CodeStub::Major>(high << 3 | low); |
| 1411 | } |
| 1412 | |
| 1413 | |
| 1414 | bool Code::is_inline_cache_stub() { |
| 1415 | Kind kind = this->kind(); |
| 1416 | return kind >= FIRST_IC_KIND && kind <= LAST_IC_KIND; |
| 1417 | } |
| 1418 | |
| 1419 | |
| 1420 | Code::Flags Code::ComputeFlags(Kind kind, |
| 1421 | InlineCacheState state, |
| 1422 | PropertyType type, |
| 1423 | int argc) { |
| 1424 | // Compute the bit mask. |
| 1425 | int bits = kind << kFlagsKindShift; |
| 1426 | bits |= state << kFlagsStateShift; |
| 1427 | bits |= type << kFlagsTypeShift; |
| 1428 | bits |= argc << kFlagsArgumentsCountShift; |
| 1429 | // Cast to flags and validate result before returning it. |
| 1430 | Flags result = static_cast<Flags>(bits); |
| 1431 | ASSERT(ExtractKindFromFlags(result) == kind); |
| 1432 | ASSERT(ExtractStateFromFlags(result) == state); |
| 1433 | ASSERT(ExtractTypeFromFlags(result) == type); |
| 1434 | ASSERT(ExtractArgumentsCountFromFlags(result) == argc); |
| 1435 | return result; |
| 1436 | } |
| 1437 | |
| 1438 | |
| 1439 | Code::Flags Code::ComputeMonomorphicFlags(Kind kind, |
| 1440 | PropertyType type, |
| 1441 | int argc) { |
| 1442 | return ComputeFlags(kind, MONOMORPHIC, type, argc); |
| 1443 | } |
| 1444 | |
| 1445 | |
| 1446 | Code::Kind Code::ExtractKindFromFlags(Flags flags) { |
| 1447 | int bits = (flags & kFlagsKindMask) >> kFlagsKindShift; |
| 1448 | return static_cast<Kind>(bits); |
| 1449 | } |
| 1450 | |
| 1451 | |
| 1452 | InlineCacheState Code::ExtractStateFromFlags(Flags flags) { |
| 1453 | int bits = (flags & kFlagsStateMask) >> kFlagsStateShift; |
| 1454 | return static_cast<InlineCacheState>(bits); |
| 1455 | } |
| 1456 | |
| 1457 | |
| 1458 | PropertyType Code::ExtractTypeFromFlags(Flags flags) { |
| 1459 | int bits = (flags & kFlagsTypeMask) >> kFlagsTypeShift; |
| 1460 | return static_cast<PropertyType>(bits); |
| 1461 | } |
| 1462 | |
| 1463 | |
| 1464 | int Code::ExtractArgumentsCountFromFlags(Flags flags) { |
| 1465 | return (flags & kFlagsArgumentsCountMask) >> kFlagsArgumentsCountShift; |
| 1466 | } |
| 1467 | |
| 1468 | |
| 1469 | Code::Flags Code::RemoveTypeFromFlags(Flags flags) { |
| 1470 | int bits = flags & ~kFlagsTypeMask; |
| 1471 | return static_cast<Flags>(bits); |
| 1472 | } |
| 1473 | |
| 1474 | |
| 1475 | Object* Map::prototype() { |
| 1476 | return READ_FIELD(this, kPrototypeOffset); |
| 1477 | } |
| 1478 | |
| 1479 | |
| 1480 | void Map::set_prototype(Object* value) { |
| 1481 | ASSERT(value->IsNull() || value->IsJSObject()); |
| 1482 | WRITE_FIELD(this, kPrototypeOffset, value); |
| 1483 | WRITE_BARRIER(this, kPrototypeOffset); |
| 1484 | } |
| 1485 | |
| 1486 | |
| 1487 | ACCESSORS(Map, instance_descriptors, DescriptorArray, |
| 1488 | kInstanceDescriptorsOffset) |
| 1489 | ACCESSORS(Map, code_cache, FixedArray, kCodeCacheOffset) |
| 1490 | ACCESSORS(Map, constructor, Object, kConstructorOffset) |
| 1491 | |
| 1492 | ACCESSORS(JSFunction, shared, SharedFunctionInfo, kSharedFunctionInfoOffset) |
| 1493 | ACCESSORS(JSFunction, literals, FixedArray, kLiteralsOffset) |
| 1494 | |
| 1495 | ACCESSORS(GlobalObject, builtins, JSBuiltinsObject, kBuiltinsOffset) |
| 1496 | ACCESSORS(GlobalObject, global_context, Context, kGlobalContextOffset) |
| 1497 | |
| 1498 | ACCESSORS(JSGlobalObject, security_token, Object, kSecurityTokenOffset) |
| 1499 | |
| 1500 | ACCESSORS(AccessorInfo, getter, Object, kGetterOffset) |
| 1501 | ACCESSORS(AccessorInfo, setter, Object, kSetterOffset) |
| 1502 | ACCESSORS(AccessorInfo, data, Object, kDataOffset) |
| 1503 | ACCESSORS(AccessorInfo, name, Object, kNameOffset) |
| 1504 | ACCESSORS(AccessorInfo, flag, Smi, kFlagOffset) |
| 1505 | |
| 1506 | ACCESSORS(AccessCheckInfo, named_callback, Object, kNamedCallbackOffset) |
| 1507 | ACCESSORS(AccessCheckInfo, indexed_callback, Object, kIndexedCallbackOffset) |
| 1508 | ACCESSORS(AccessCheckInfo, data, Object, kDataOffset) |
| 1509 | |
| 1510 | ACCESSORS(InterceptorInfo, getter, Object, kGetterOffset) |
| 1511 | ACCESSORS(InterceptorInfo, setter, Object, kSetterOffset) |
| 1512 | ACCESSORS(InterceptorInfo, query, Object, kQueryOffset) |
| 1513 | ACCESSORS(InterceptorInfo, deleter, Object, kDeleterOffset) |
| 1514 | ACCESSORS(InterceptorInfo, enumerator, Object, kEnumeratorOffset) |
| 1515 | ACCESSORS(InterceptorInfo, data, Object, kDataOffset) |
| 1516 | |
| 1517 | ACCESSORS(CallHandlerInfo, callback, Object, kCallbackOffset) |
| 1518 | ACCESSORS(CallHandlerInfo, data, Object, kDataOffset) |
| 1519 | |
| 1520 | ACCESSORS(TemplateInfo, tag, Object, kTagOffset) |
| 1521 | ACCESSORS(TemplateInfo, property_list, Object, kPropertyListOffset) |
| 1522 | |
| 1523 | ACCESSORS(FunctionTemplateInfo, serial_number, Object, kSerialNumberOffset) |
| 1524 | ACCESSORS(FunctionTemplateInfo, call_code, Object, kCallCodeOffset) |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1525 | ACCESSORS(FunctionTemplateInfo, property_accessors, Object, |
| 1526 | kPropertyAccessorsOffset) |
| 1527 | ACCESSORS(FunctionTemplateInfo, prototype_template, Object, |
| 1528 | kPrototypeTemplateOffset) |
| 1529 | ACCESSORS(FunctionTemplateInfo, parent_template, Object, kParentTemplateOffset) |
| 1530 | ACCESSORS(FunctionTemplateInfo, named_property_handler, Object, |
| 1531 | kNamedPropertyHandlerOffset) |
| 1532 | ACCESSORS(FunctionTemplateInfo, indexed_property_handler, Object, |
| 1533 | kIndexedPropertyHandlerOffset) |
| 1534 | ACCESSORS(FunctionTemplateInfo, instance_template, Object, |
| 1535 | kInstanceTemplateOffset) |
| 1536 | ACCESSORS(FunctionTemplateInfo, class_name, Object, kClassNameOffset) |
| 1537 | ACCESSORS(FunctionTemplateInfo, signature, Object, kSignatureOffset) |
| 1538 | ACCESSORS(FunctionTemplateInfo, lookup_callback, Object, kLookupCallbackOffset) |
| 1539 | ACCESSORS(FunctionTemplateInfo, instance_call_handler, Object, |
| 1540 | kInstanceCallHandlerOffset) |
| 1541 | ACCESSORS(FunctionTemplateInfo, access_check_info, Object, |
| 1542 | kAccessCheckInfoOffset) |
| 1543 | ACCESSORS(FunctionTemplateInfo, flag, Smi, kFlagOffset) |
| 1544 | |
| 1545 | ACCESSORS(ObjectTemplateInfo, constructor, Object, kConstructorOffset) |
kasper.lund | 212ac23 | 2008-07-16 07:07:30 +0000 | [diff] [blame^] | 1546 | ACCESSORS(ObjectTemplateInfo, internal_field_count, Object, |
| 1547 | kInternalFieldCountOffset) |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 1548 | |
| 1549 | ACCESSORS(SignatureInfo, receiver, Object, kReceiverOffset) |
| 1550 | ACCESSORS(SignatureInfo, args, Object, kArgsOffset) |
| 1551 | |
| 1552 | ACCESSORS(TypeSwitchInfo, types, Object, kTypesOffset) |
| 1553 | |
| 1554 | ACCESSORS(Script, source, Object, kSourceOffset) |
| 1555 | ACCESSORS(Script, name, Object, kNameOffset) |
| 1556 | ACCESSORS(Script, line_offset, Smi, kLineOffsetOffset) |
| 1557 | ACCESSORS(Script, column_offset, Smi, kColumnOffsetOffset) |
| 1558 | ACCESSORS(Script, wrapper, Proxy, kWrapperOffset) |
| 1559 | ACCESSORS(Script, type, Smi, kTypeOffset) |
| 1560 | |
| 1561 | ACCESSORS(DebugInfo, shared, SharedFunctionInfo, kSharedFunctionInfoIndex) |
| 1562 | ACCESSORS(DebugInfo, original_code, Code, kOriginalCodeIndex) |
| 1563 | ACCESSORS(DebugInfo, code, Code, kPatchedCodeIndex) |
| 1564 | ACCESSORS(DebugInfo, break_points, FixedArray, kBreakPointsStateIndex) |
| 1565 | |
| 1566 | ACCESSORS(BreakPointInfo, code_position, Smi, kCodePositionIndex) |
| 1567 | ACCESSORS(BreakPointInfo, source_position, Smi, kSourcePositionIndex) |
| 1568 | ACCESSORS(BreakPointInfo, statement_position, Smi, kStatementPositionIndex) |
| 1569 | ACCESSORS(BreakPointInfo, break_point_objects, Object, kBreakPointObjectsIndex) |
| 1570 | |
| 1571 | ACCESSORS(SharedFunctionInfo, name, Object, kNameOffset) |
| 1572 | ACCESSORS(SharedFunctionInfo, instance_class_name, Object, |
| 1573 | kInstanceClassNameOffset) |
| 1574 | ACCESSORS(SharedFunctionInfo, function_data, Object, |
| 1575 | kExternalReferenceDataOffset) |
| 1576 | ACCESSORS(SharedFunctionInfo, lazy_load_data, Object, kLazyLoadDataOffset) |
| 1577 | ACCESSORS(SharedFunctionInfo, script, Object, kScriptOffset) |
| 1578 | ACCESSORS(SharedFunctionInfo, debug_info, Object, kDebugInfoOffset) |
| 1579 | |
| 1580 | BOOL_ACCESSORS(FunctionTemplateInfo, flag, hidden_prototype, |
| 1581 | kHiddenPrototypeBit) |
| 1582 | BOOL_ACCESSORS(FunctionTemplateInfo, flag, undetectable, kUndetectableBit) |
| 1583 | BOOL_ACCESSORS(FunctionTemplateInfo, flag, needs_access_check, |
| 1584 | kNeedsAccessCheckBit) |
| 1585 | BOOL_ACCESSORS(SharedFunctionInfo, start_position_and_type, is_expression, |
| 1586 | kIsExpressionBit) |
| 1587 | BOOL_ACCESSORS(SharedFunctionInfo, start_position_and_type, is_toplevel, |
| 1588 | kIsTopLevelBit) |
| 1589 | |
| 1590 | INT_ACCESSORS(SharedFunctionInfo, length, kLengthOffset) |
| 1591 | INT_ACCESSORS(SharedFunctionInfo, formal_parameter_count, |
| 1592 | kFormalParameterCountOffset) |
| 1593 | INT_ACCESSORS(SharedFunctionInfo, expected_nof_properties, |
| 1594 | kExpectedNofPropertiesOffset) |
| 1595 | INT_ACCESSORS(SharedFunctionInfo, start_position_and_type, |
| 1596 | kStartPositionAndTypeOffset) |
| 1597 | INT_ACCESSORS(SharedFunctionInfo, end_position, kEndPositionOffset) |
| 1598 | INT_ACCESSORS(SharedFunctionInfo, function_token_position, |
| 1599 | kFunctionTokenPositionOffset) |
| 1600 | |
| 1601 | |
| 1602 | int SharedFunctionInfo::start_position() { |
| 1603 | return start_position_and_type() >> kStartPositionShift; |
| 1604 | } |
| 1605 | |
| 1606 | |
| 1607 | void SharedFunctionInfo::set_start_position(int start_position) { |
| 1608 | set_start_position_and_type((start_position << kStartPositionShift) |
| 1609 | | (start_position_and_type() & ~kStartPositionMask)); |
| 1610 | } |
| 1611 | |
| 1612 | |
| 1613 | Code* SharedFunctionInfo::code() { |
| 1614 | return Code::cast(READ_FIELD(this, kCodeOffset)); |
| 1615 | } |
| 1616 | |
| 1617 | |
| 1618 | void SharedFunctionInfo::set_code(Code* value) { |
| 1619 | WRITE_FIELD(this, kCodeOffset, value); |
| 1620 | WRITE_BARRIER(this, kCodeOffset); |
| 1621 | } |
| 1622 | |
| 1623 | |
| 1624 | bool SharedFunctionInfo::is_compiled() { |
| 1625 | // TODO(1242782): Create a code kind for uncompiled code. |
| 1626 | return code()->kind() != Code::STUB; |
| 1627 | } |
| 1628 | |
| 1629 | |
| 1630 | bool JSFunction::IsBoilerplate() { |
| 1631 | return map() == Heap::boilerplate_function_map(); |
| 1632 | } |
| 1633 | |
| 1634 | |
| 1635 | bool JSFunction::IsLoaded() { |
| 1636 | return shared()->lazy_load_data() == Heap::undefined_value(); |
| 1637 | } |
| 1638 | |
| 1639 | |
| 1640 | Code* JSFunction::code() { |
| 1641 | return shared()->code(); |
| 1642 | } |
| 1643 | |
| 1644 | |
| 1645 | void JSFunction::set_code(Code* value) { |
| 1646 | shared()->set_code(value); |
| 1647 | } |
| 1648 | |
| 1649 | |
| 1650 | Context* JSFunction::context() { |
| 1651 | return Context::cast(READ_FIELD(this, kContextOffset)); |
| 1652 | } |
| 1653 | |
| 1654 | |
| 1655 | Object* JSFunction::unchecked_context() { |
| 1656 | return READ_FIELD(this, kContextOffset); |
| 1657 | } |
| 1658 | |
| 1659 | |
| 1660 | void JSFunction::set_context(Object* value) { |
| 1661 | ASSERT(value == Heap::undefined_value() || value->IsContext()); |
| 1662 | WRITE_FIELD(this, kContextOffset, value); |
| 1663 | WRITE_BARRIER(this, kContextOffset); |
| 1664 | } |
| 1665 | |
| 1666 | ACCESSORS(JSFunction, prototype_or_initial_map, Object, |
| 1667 | kPrototypeOrInitialMapOffset) |
| 1668 | |
| 1669 | |
| 1670 | Map* JSFunction::initial_map() { |
| 1671 | return Map::cast(prototype_or_initial_map()); |
| 1672 | } |
| 1673 | |
| 1674 | |
| 1675 | void JSFunction::set_initial_map(Map* value) { |
| 1676 | set_prototype_or_initial_map(value); |
| 1677 | } |
| 1678 | |
| 1679 | |
| 1680 | bool JSFunction::has_initial_map() { |
| 1681 | return prototype_or_initial_map()->IsMap(); |
| 1682 | } |
| 1683 | |
| 1684 | |
| 1685 | bool JSFunction::has_instance_prototype() { |
| 1686 | return has_initial_map() || !prototype_or_initial_map()->IsTheHole(); |
| 1687 | } |
| 1688 | |
| 1689 | |
| 1690 | bool JSFunction::has_prototype() { |
| 1691 | return map()->has_non_instance_prototype() || has_instance_prototype(); |
| 1692 | } |
| 1693 | |
| 1694 | |
| 1695 | Object* JSFunction::instance_prototype() { |
| 1696 | ASSERT(has_instance_prototype()); |
| 1697 | if (has_initial_map()) return initial_map()->prototype(); |
| 1698 | // When there is no initial map and the prototype is a JSObject, the |
| 1699 | // initial map field is used for the prototype field. |
| 1700 | return prototype_or_initial_map(); |
| 1701 | } |
| 1702 | |
| 1703 | |
| 1704 | Object* JSFunction::prototype() { |
| 1705 | ASSERT(has_prototype()); |
| 1706 | // If the function's prototype property has been set to a non-JSObject |
| 1707 | // value, that value is stored in the constructor field of the map. |
| 1708 | if (map()->has_non_instance_prototype()) return map()->constructor(); |
| 1709 | return instance_prototype(); |
| 1710 | } |
| 1711 | |
| 1712 | |
| 1713 | bool JSFunction::is_compiled() { |
| 1714 | return shared()->is_compiled(); |
| 1715 | } |
| 1716 | |
| 1717 | |
| 1718 | Object* JSBuiltinsObject::javascript_builtin(Builtins::JavaScript id) { |
| 1719 | ASSERT(0 <= id && id < kJSBuiltinsCount); |
| 1720 | return READ_FIELD(this, kJSBuiltinsOffset + (id * kPointerSize)); |
| 1721 | } |
| 1722 | |
| 1723 | |
| 1724 | void JSBuiltinsObject::set_javascript_builtin(Builtins::JavaScript id, |
| 1725 | Object* value) { |
| 1726 | ASSERT(0 <= id && id < kJSBuiltinsCount); |
| 1727 | WRITE_FIELD(this, kJSBuiltinsOffset + (id * kPointerSize), value); |
| 1728 | WRITE_BARRIER(this, kJSBuiltinsOffset + (id * kPointerSize)); |
| 1729 | } |
| 1730 | |
| 1731 | |
| 1732 | Address Proxy::proxy() { |
| 1733 | return AddressFrom<Address>(READ_INT_FIELD(this, kProxyOffset)); |
| 1734 | } |
| 1735 | |
| 1736 | |
| 1737 | void Proxy::set_proxy(Address value) { |
| 1738 | WRITE_INT_FIELD(this, kProxyOffset, OffsetFrom(value)); |
| 1739 | } |
| 1740 | |
| 1741 | |
| 1742 | void Proxy::ProxyIterateBody(ObjectVisitor* visitor) { |
| 1743 | visitor->VisitExternalReference( |
| 1744 | reinterpret_cast<Address *>(FIELD_ADDR(this, kProxyOffset))); |
| 1745 | } |
| 1746 | |
| 1747 | |
| 1748 | ACCESSORS(JSValue, value, Object, kValueOffset) |
| 1749 | |
| 1750 | |
| 1751 | JSValue* JSValue::cast(Object* obj) { |
| 1752 | ASSERT(obj->IsJSValue()); |
| 1753 | ASSERT(HeapObject::cast(obj)->Size() == JSValue::kSize); |
| 1754 | return reinterpret_cast<JSValue*>(obj); |
| 1755 | } |
| 1756 | |
| 1757 | |
| 1758 | INT_ACCESSORS(Code, instruction_size, kInstructionSizeOffset) |
| 1759 | INT_ACCESSORS(Code, relocation_size, kRelocationSizeOffset) |
| 1760 | INT_ACCESSORS(Code, sinfo_size, kSInfoSizeOffset) |
| 1761 | |
| 1762 | |
| 1763 | Code::ICTargetState Code::ic_flag() { |
| 1764 | return static_cast<ICTargetState>(READ_INT_FIELD(this, kICFlagOffset)); |
| 1765 | } |
| 1766 | |
| 1767 | |
| 1768 | void Code::set_ic_flag(ICTargetState value) { |
| 1769 | WRITE_INT_FIELD(this, kICFlagOffset, value); |
| 1770 | } |
| 1771 | |
| 1772 | |
| 1773 | byte* Code::instruction_start() { |
| 1774 | return FIELD_ADDR(this, kHeaderSize); |
| 1775 | } |
| 1776 | |
| 1777 | |
| 1778 | int Code::body_size() { |
| 1779 | return RoundUp(instruction_size() + relocation_size(), kObjectAlignment); |
| 1780 | } |
| 1781 | |
| 1782 | |
| 1783 | byte* Code::relocation_start() { |
| 1784 | return FIELD_ADDR(this, CodeSize() - sinfo_size() - relocation_size()); |
| 1785 | } |
| 1786 | |
| 1787 | |
| 1788 | byte* Code::entry() { |
| 1789 | return instruction_start(); |
| 1790 | } |
| 1791 | |
| 1792 | |
| 1793 | bool Code::contains(byte* pc) { |
| 1794 | return (instruction_start() <= pc) && |
| 1795 | (pc < instruction_start() + instruction_size()); |
| 1796 | } |
| 1797 | |
| 1798 | |
| 1799 | byte* Code::sinfo_start() { |
| 1800 | return FIELD_ADDR(this, CodeSize() - sinfo_size()); |
| 1801 | } |
| 1802 | |
| 1803 | |
| 1804 | ACCESSORS(JSArray, length, Object, kLengthOffset) |
| 1805 | |
| 1806 | |
| 1807 | bool JSObject::HasFastElements() { |
| 1808 | return !elements()->IsDictionary(); |
| 1809 | } |
| 1810 | |
| 1811 | |
| 1812 | bool JSObject::HasNamedInterceptor() { |
| 1813 | return map()->has_named_interceptor(); |
| 1814 | } |
| 1815 | |
| 1816 | |
| 1817 | bool JSObject::HasIndexedInterceptor() { |
| 1818 | return map()->has_indexed_interceptor(); |
| 1819 | } |
| 1820 | |
| 1821 | |
| 1822 | Dictionary* JSObject::property_dictionary() { |
| 1823 | ASSERT(!HasFastProperties()); |
| 1824 | return Dictionary::cast(properties()); |
| 1825 | } |
| 1826 | |
| 1827 | |
| 1828 | Dictionary* JSObject::element_dictionary() { |
| 1829 | ASSERT(!HasFastElements()); |
| 1830 | return Dictionary::cast(elements()); |
| 1831 | } |
| 1832 | |
| 1833 | |
| 1834 | bool String::HasHashCode() { |
| 1835 | return (length_field() & kHashComputedMask) != 0; |
| 1836 | } |
| 1837 | |
| 1838 | |
| 1839 | uint32_t String::Hash() { |
| 1840 | // Fast case: has hash code already been computed? |
| 1841 | int hash = length_field(); |
| 1842 | if (hash & kHashComputedMask) return hash; |
| 1843 | // Slow case: compute hash code and set it.. |
| 1844 | return ComputeAndSetHash(); |
| 1845 | } |
| 1846 | |
| 1847 | |
| 1848 | bool String::AsArrayIndex(uint32_t* index) { |
| 1849 | int hash = length_field(); |
| 1850 | if ((hash & kHashComputedMask) && !(hash & kIsArrayIndexMask)) return false; |
| 1851 | return SlowAsArrayIndex(index); |
| 1852 | } |
| 1853 | |
| 1854 | |
| 1855 | Object* JSObject::GetPrototype() { |
| 1856 | return JSObject::cast(this)->map()->prototype(); |
| 1857 | } |
| 1858 | |
| 1859 | |
| 1860 | PropertyAttributes JSObject::GetPropertyAttribute(String* key) { |
| 1861 | return GetPropertyAttributeWithReceiver(this, key); |
| 1862 | } |
| 1863 | |
| 1864 | |
| 1865 | bool JSObject::HasElement(uint32_t index) { |
| 1866 | return HasElementWithReceiver(this, index); |
| 1867 | } |
| 1868 | |
| 1869 | |
| 1870 | bool AccessorInfo::all_can_read() { |
| 1871 | return BooleanBit::get(flag(), kAllCanReadBit); |
| 1872 | } |
| 1873 | |
| 1874 | |
| 1875 | void AccessorInfo::set_all_can_read(bool value) { |
| 1876 | set_flag(BooleanBit::set(flag(), kAllCanReadBit, value)); |
| 1877 | } |
| 1878 | |
| 1879 | |
| 1880 | bool AccessorInfo::all_can_write() { |
| 1881 | return BooleanBit::get(flag(), kAllCanWriteBit); |
| 1882 | } |
| 1883 | |
| 1884 | |
| 1885 | void AccessorInfo::set_all_can_write(bool value) { |
| 1886 | set_flag(BooleanBit::set(flag(), kAllCanWriteBit, value)); |
| 1887 | } |
| 1888 | |
| 1889 | |
| 1890 | PropertyAttributes AccessorInfo::property_attributes() { |
| 1891 | return AttributesField::decode(static_cast<uint32_t>(flag()->value())); |
| 1892 | } |
| 1893 | |
| 1894 | |
| 1895 | void AccessorInfo::set_property_attributes(PropertyAttributes attributes) { |
| 1896 | ASSERT(AttributesField::is_valid(attributes)); |
| 1897 | int rest_value = flag()->value() & ~AttributesField::mask(); |
| 1898 | set_flag(Smi::FromInt(rest_value | AttributesField::encode(attributes))); |
| 1899 | } |
| 1900 | |
| 1901 | void Dictionary::SetEntry(int entry, |
| 1902 | Object* key, |
| 1903 | Object* value, |
| 1904 | PropertyDetails details) { |
| 1905 | ASSERT(!key->IsString() || details.index() > 0); |
| 1906 | int index = EntryToIndex(entry); |
| 1907 | WriteBarrierMode mode = GetWriteBarrierMode(); |
| 1908 | set(index, key, mode); |
| 1909 | set(index+1, value, mode); |
| 1910 | fast_set(this, index+2, details.AsSmi()); |
| 1911 | } |
| 1912 | |
| 1913 | |
| 1914 | void Map::ClearCodeCache() { |
| 1915 | // No write barrier is needed since empty_fixed_array is not in new space. |
| 1916 | // Please note this function is used during marking: |
| 1917 | // - MarkCompactCollector::MarkUnmarkedObject |
| 1918 | ASSERT(!Heap::InNewSpace(Heap::empty_fixed_array())); |
| 1919 | WRITE_FIELD(this, kCodeCacheOffset, Heap::empty_fixed_array()); |
| 1920 | } |
| 1921 | |
| 1922 | |
| 1923 | #undef CAST_ACCESSOR |
| 1924 | #undef INT_ACCESSORS |
| 1925 | #undef SMI_ACCESSORS |
| 1926 | #undef ACCESSORS |
| 1927 | #undef FIELD_ADDR |
| 1928 | #undef READ_FIELD |
| 1929 | #undef WRITE_FIELD |
| 1930 | #undef WRITE_BARRIER |
| 1931 | #undef READ_MEMADDR_FIELD |
| 1932 | #undef WRITE_MEMADDR_FIELD |
| 1933 | #undef READ_DOUBLE_FIELD |
| 1934 | #undef WRITE_DOUBLE_FIELD |
| 1935 | #undef READ_INT_FIELD |
| 1936 | #undef WRITE_INT_FIELD |
| 1937 | #undef READ_SHORT_FIELD |
| 1938 | #undef WRITE_SHORT_FIELD |
| 1939 | #undef READ_BYTE_FIELD |
| 1940 | #undef WRITE_BYTE_FIELD |
| 1941 | |
| 1942 | |
| 1943 | } } // namespace v8::internal |
| 1944 | |
| 1945 | #endif // V8_OBJECTS_INL_H_ |