ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 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 | #include "v8.h" |
| 29 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 30 | #include "arguments.h" |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 31 | #include "objects.h" |
| 32 | #include "elements.h" |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 33 | #include "utils.h" |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 34 | #include "v8conversions.h" |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 35 | |
| 36 | // Each concrete ElementsAccessor can handle exactly one ElementsKind, |
| 37 | // several abstract ElementsAccessor classes are used to allow sharing |
| 38 | // common code. |
| 39 | // |
| 40 | // Inheritance hierarchy: |
| 41 | // - ElementsAccessorBase (abstract) |
| 42 | // - FastElementsAccessor (abstract) |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 43 | // - FastSmiOrObjectElementsAccessor |
| 44 | // - FastPackedSmiElementsAccessor |
| 45 | // - FastHoleySmiElementsAccessor |
| 46 | // - FastPackedObjectElementsAccessor |
| 47 | // - FastHoleyObjectElementsAccessor |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 48 | // - FastDoubleElementsAccessor |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 49 | // - FastPackedDoubleElementsAccessor |
| 50 | // - FastHoleyDoubleElementsAccessor |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 51 | // - ExternalElementsAccessor (abstract) |
| 52 | // - ExternalByteElementsAccessor |
| 53 | // - ExternalUnsignedByteElementsAccessor |
| 54 | // - ExternalShortElementsAccessor |
| 55 | // - ExternalUnsignedShortElementsAccessor |
| 56 | // - ExternalIntElementsAccessor |
| 57 | // - ExternalUnsignedIntElementsAccessor |
| 58 | // - ExternalFloatElementsAccessor |
| 59 | // - ExternalDoubleElementsAccessor |
| 60 | // - PixelElementsAccessor |
| 61 | // - DictionaryElementsAccessor |
| 62 | // - NonStrictArgumentsElementsAccessor |
| 63 | |
| 64 | |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 65 | namespace v8 { |
| 66 | namespace internal { |
| 67 | |
| 68 | |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 69 | static const int kPackedSizeNotKnown = -1; |
| 70 | |
| 71 | |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 72 | // First argument in list is the accessor class, the second argument is the |
| 73 | // accessor ElementsKind, and the third is the backing store class. Use the |
| 74 | // fast element handler for smi-only arrays. The implementation is currently |
| 75 | // identical. Note that the order must match that of the ElementsKind enum for |
| 76 | // the |accessor_array[]| below to work. |
| 77 | #define ELEMENTS_LIST(V) \ |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 78 | V(FastPackedSmiElementsAccessor, FAST_SMI_ELEMENTS, FixedArray) \ |
| 79 | V(FastHoleySmiElementsAccessor, FAST_HOLEY_SMI_ELEMENTS, \ |
| 80 | FixedArray) \ |
| 81 | V(FastPackedObjectElementsAccessor, FAST_ELEMENTS, FixedArray) \ |
| 82 | V(FastHoleyObjectElementsAccessor, FAST_HOLEY_ELEMENTS, FixedArray) \ |
| 83 | V(FastPackedDoubleElementsAccessor, FAST_DOUBLE_ELEMENTS, \ |
| 84 | FixedDoubleArray) \ |
| 85 | V(FastHoleyDoubleElementsAccessor, FAST_HOLEY_DOUBLE_ELEMENTS, \ |
| 86 | FixedDoubleArray) \ |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 87 | V(DictionaryElementsAccessor, DICTIONARY_ELEMENTS, \ |
| 88 | SeededNumberDictionary) \ |
| 89 | V(NonStrictArgumentsElementsAccessor, NON_STRICT_ARGUMENTS_ELEMENTS, \ |
| 90 | FixedArray) \ |
| 91 | V(ExternalByteElementsAccessor, EXTERNAL_BYTE_ELEMENTS, \ |
| 92 | ExternalByteArray) \ |
| 93 | V(ExternalUnsignedByteElementsAccessor, \ |
| 94 | EXTERNAL_UNSIGNED_BYTE_ELEMENTS, ExternalUnsignedByteArray) \ |
| 95 | V(ExternalShortElementsAccessor, EXTERNAL_SHORT_ELEMENTS, \ |
| 96 | ExternalShortArray) \ |
| 97 | V(ExternalUnsignedShortElementsAccessor, \ |
| 98 | EXTERNAL_UNSIGNED_SHORT_ELEMENTS, ExternalUnsignedShortArray) \ |
| 99 | V(ExternalIntElementsAccessor, EXTERNAL_INT_ELEMENTS, \ |
| 100 | ExternalIntArray) \ |
| 101 | V(ExternalUnsignedIntElementsAccessor, \ |
| 102 | EXTERNAL_UNSIGNED_INT_ELEMENTS, ExternalUnsignedIntArray) \ |
| 103 | V(ExternalFloatElementsAccessor, \ |
| 104 | EXTERNAL_FLOAT_ELEMENTS, ExternalFloatArray) \ |
| 105 | V(ExternalDoubleElementsAccessor, \ |
| 106 | EXTERNAL_DOUBLE_ELEMENTS, ExternalDoubleArray) \ |
| 107 | V(PixelElementsAccessor, EXTERNAL_PIXEL_ELEMENTS, ExternalPixelArray) |
| 108 | |
| 109 | |
| 110 | template<ElementsKind Kind> class ElementsKindTraits { |
| 111 | public: |
| 112 | typedef FixedArrayBase BackingStore; |
| 113 | }; |
| 114 | |
| 115 | #define ELEMENTS_TRAITS(Class, KindParam, Store) \ |
| 116 | template<> class ElementsKindTraits<KindParam> { \ |
| 117 | public: \ |
| 118 | static const ElementsKind Kind = KindParam; \ |
| 119 | typedef Store BackingStore; \ |
| 120 | }; |
| 121 | ELEMENTS_LIST(ELEMENTS_TRAITS) |
| 122 | #undef ELEMENTS_TRAITS |
| 123 | |
| 124 | |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 125 | ElementsAccessor** ElementsAccessor::elements_accessors_; |
| 126 | |
| 127 | |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 128 | static bool HasKey(FixedArray* array, Object* key) { |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 129 | int len0 = array->length(); |
| 130 | for (int i = 0; i < len0; i++) { |
| 131 | Object* element = array->get(i); |
| 132 | if (element->IsSmi() && element == key) return true; |
| 133 | if (element->IsString() && |
| 134 | key->IsString() && String::cast(element)->Equals(String::cast(key))) { |
| 135 | return true; |
| 136 | } |
| 137 | } |
| 138 | return false; |
| 139 | } |
| 140 | |
| 141 | |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 142 | static Failure* ThrowArrayLengthRangeError(Heap* heap) { |
| 143 | HandleScope scope(heap->isolate()); |
| 144 | return heap->isolate()->Throw( |
| 145 | *heap->isolate()->factory()->NewRangeError("invalid_array_length", |
| 146 | HandleVector<Object>(NULL, 0))); |
| 147 | } |
| 148 | |
| 149 | |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 150 | static void CopyObjectToObjectElements(FixedArrayBase* from_base, |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 151 | ElementsKind from_kind, |
| 152 | uint32_t from_start, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 153 | FixedArrayBase* to_base, |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 154 | ElementsKind to_kind, |
| 155 | uint32_t to_start, |
| 156 | int raw_copy_size) { |
hpayer@chromium.org | c5d4971 | 2013-09-11 08:25:48 +0000 | [diff] [blame] | 157 | ASSERT(to_base->map() != |
| 158 | from_base->GetIsolate()->heap()->fixed_cow_array_map()); |
rossberg@chromium.org | 79e7902 | 2013-06-03 15:43:46 +0000 | [diff] [blame] | 159 | DisallowHeapAllocation no_allocation; |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 160 | int copy_size = raw_copy_size; |
| 161 | if (raw_copy_size < 0) { |
| 162 | ASSERT(raw_copy_size == ElementsAccessor::kCopyToEnd || |
| 163 | raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole); |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 164 | copy_size = Min(from_base->length() - from_start, |
| 165 | to_base->length() - to_start); |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 166 | if (raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole) { |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 167 | int start = to_start + copy_size; |
| 168 | int length = to_base->length() - start; |
| 169 | if (length > 0) { |
| 170 | Heap* heap = from_base->GetHeap(); |
| 171 | MemsetPointer(FixedArray::cast(to_base)->data_start() + start, |
| 172 | heap->the_hole_value(), length); |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 173 | } |
| 174 | } |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 175 | } |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 176 | ASSERT((copy_size + static_cast<int>(to_start)) <= to_base->length() && |
| 177 | (copy_size + static_cast<int>(from_start)) <= from_base->length()); |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 178 | if (copy_size == 0) return; |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 179 | FixedArray* from = FixedArray::cast(from_base); |
| 180 | FixedArray* to = FixedArray::cast(to_base); |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 181 | ASSERT(IsFastSmiOrObjectElementsKind(from_kind)); |
| 182 | ASSERT(IsFastSmiOrObjectElementsKind(to_kind)); |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 183 | Address to_address = to->address() + FixedArray::kHeaderSize; |
| 184 | Address from_address = from->address() + FixedArray::kHeaderSize; |
| 185 | CopyWords(reinterpret_cast<Object**>(to_address) + to_start, |
| 186 | reinterpret_cast<Object**>(from_address) + from_start, |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 187 | static_cast<size_t>(copy_size)); |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 188 | if (IsFastObjectElementsKind(from_kind) && |
| 189 | IsFastObjectElementsKind(to_kind)) { |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 190 | Heap* heap = from->GetHeap(); |
| 191 | if (!heap->InNewSpace(to)) { |
| 192 | heap->RecordWrites(to->address(), |
| 193 | to->OffsetOfElementAt(to_start), |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 194 | copy_size); |
| 195 | } |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 196 | heap->incremental_marking()->RecordWrites(to); |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 197 | } |
| 198 | } |
| 199 | |
| 200 | |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 201 | static void CopyDictionaryToObjectElements(FixedArrayBase* from_base, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 202 | uint32_t from_start, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 203 | FixedArrayBase* to_base, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 204 | ElementsKind to_kind, |
| 205 | uint32_t to_start, |
danno@chromium.org | c740616 | 2012-03-26 09:46:02 +0000 | [diff] [blame] | 206 | int raw_copy_size) { |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 207 | SeededNumberDictionary* from = SeededNumberDictionary::cast(from_base); |
rossberg@chromium.org | 79e7902 | 2013-06-03 15:43:46 +0000 | [diff] [blame] | 208 | DisallowHeapAllocation no_allocation; |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 209 | int copy_size = raw_copy_size; |
| 210 | Heap* heap = from->GetHeap(); |
| 211 | if (raw_copy_size < 0) { |
| 212 | ASSERT(raw_copy_size == ElementsAccessor::kCopyToEnd || |
| 213 | raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole); |
| 214 | copy_size = from->max_number_key() + 1 - from_start; |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 215 | if (raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole) { |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 216 | int start = to_start + copy_size; |
| 217 | int length = to_base->length() - start; |
| 218 | if (length > 0) { |
| 219 | Heap* heap = from->GetHeap(); |
| 220 | MemsetPointer(FixedArray::cast(to_base)->data_start() + start, |
| 221 | heap->the_hole_value(), length); |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 222 | } |
| 223 | } |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 224 | } |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 225 | ASSERT(to_base != from_base); |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 226 | ASSERT(IsFastSmiOrObjectElementsKind(to_kind)); |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 227 | if (copy_size == 0) return; |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 228 | FixedArray* to = FixedArray::cast(to_base); |
danno@chromium.org | 8c0a43f | 2012-04-03 08:37:53 +0000 | [diff] [blame] | 229 | uint32_t to_length = to->length(); |
| 230 | if (to_start + copy_size > to_length) { |
| 231 | copy_size = to_length - to_start; |
| 232 | } |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 233 | for (int i = 0; i < copy_size; i++) { |
| 234 | int entry = from->FindEntry(i + from_start); |
| 235 | if (entry != SeededNumberDictionary::kNotFound) { |
| 236 | Object* value = from->ValueAt(entry); |
| 237 | ASSERT(!value->IsTheHole()); |
| 238 | to->set(i + to_start, value, SKIP_WRITE_BARRIER); |
| 239 | } else { |
| 240 | to->set_the_hole(i + to_start); |
| 241 | } |
| 242 | } |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 243 | if (IsFastObjectElementsKind(to_kind)) { |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 244 | if (!heap->InNewSpace(to)) { |
| 245 | heap->RecordWrites(to->address(), |
| 246 | to->OffsetOfElementAt(to_start), |
| 247 | copy_size); |
| 248 | } |
| 249 | heap->incremental_marking()->RecordWrites(to); |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 250 | } |
| 251 | } |
| 252 | |
| 253 | |
| 254 | MUST_USE_RESULT static MaybeObject* CopyDoubleToObjectElements( |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 255 | FixedArrayBase* from_base, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 256 | uint32_t from_start, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 257 | FixedArrayBase* to_base, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 258 | ElementsKind to_kind, |
| 259 | uint32_t to_start, |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 260 | int raw_copy_size) { |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 261 | ASSERT(IsFastSmiOrObjectElementsKind(to_kind)); |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 262 | int copy_size = raw_copy_size; |
| 263 | if (raw_copy_size < 0) { |
| 264 | ASSERT(raw_copy_size == ElementsAccessor::kCopyToEnd || |
| 265 | raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole); |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 266 | copy_size = Min(from_base->length() - from_start, |
| 267 | to_base->length() - to_start); |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 268 | if (raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole) { |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 269 | // Also initialize the area that will be copied over since HeapNumber |
| 270 | // allocation below can cause an incremental marking step, requiring all |
| 271 | // existing heap objects to be propertly initialized. |
| 272 | int start = to_start; |
| 273 | int length = to_base->length() - start; |
| 274 | if (length > 0) { |
| 275 | Heap* heap = from_base->GetHeap(); |
| 276 | MemsetPointer(FixedArray::cast(to_base)->data_start() + start, |
| 277 | heap->the_hole_value(), length); |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 278 | } |
| 279 | } |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 280 | } |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 281 | ASSERT((copy_size + static_cast<int>(to_start)) <= to_base->length() && |
| 282 | (copy_size + static_cast<int>(from_start)) <= from_base->length()); |
| 283 | if (copy_size == 0) return from_base; |
| 284 | FixedDoubleArray* from = FixedDoubleArray::cast(from_base); |
| 285 | FixedArray* to = FixedArray::cast(to_base); |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 286 | for (int i = 0; i < copy_size; ++i) { |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 287 | if (IsFastSmiElementsKind(to_kind)) { |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 288 | UNIMPLEMENTED(); |
| 289 | return Failure::Exception(); |
| 290 | } else { |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 291 | MaybeObject* maybe_value = from->get(i + from_start); |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 292 | Object* value; |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 293 | ASSERT(IsFastObjectElementsKind(to_kind)); |
| 294 | // Because Double -> Object elements transitions allocate HeapObjects |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 295 | // iteratively, the allocate must succeed within a single GC cycle, |
| 296 | // otherwise the retry after the GC will also fail. In order to ensure |
| 297 | // that no GC is triggered, allocate HeapNumbers from old space if they |
| 298 | // can't be taken from new space. |
| 299 | if (!maybe_value->ToObject(&value)) { |
| 300 | ASSERT(maybe_value->IsRetryAfterGC() || maybe_value->IsOutOfMemory()); |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 301 | Heap* heap = from->GetHeap(); |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 302 | MaybeObject* maybe_value_object = |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 303 | heap->AllocateHeapNumber(from->get_scalar(i + from_start), |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 304 | TENURED); |
| 305 | if (!maybe_value_object->ToObject(&value)) return maybe_value_object; |
| 306 | } |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 307 | to->set(i + to_start, value, UPDATE_WRITE_BARRIER); |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 308 | } |
| 309 | } |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 310 | return to; |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 311 | } |
| 312 | |
| 313 | |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 314 | static void CopyDoubleToDoubleElements(FixedArrayBase* from_base, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 315 | uint32_t from_start, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 316 | FixedArrayBase* to_base, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 317 | uint32_t to_start, |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 318 | int raw_copy_size) { |
| 319 | int copy_size = raw_copy_size; |
| 320 | if (raw_copy_size < 0) { |
| 321 | ASSERT(raw_copy_size == ElementsAccessor::kCopyToEnd || |
| 322 | raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole); |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 323 | copy_size = Min(from_base->length() - from_start, |
| 324 | to_base->length() - to_start); |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 325 | if (raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole) { |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 326 | for (int i = to_start + copy_size; i < to_base->length(); ++i) { |
| 327 | FixedDoubleArray::cast(to_base)->set_the_hole(i); |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 328 | } |
| 329 | } |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 330 | } |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 331 | ASSERT((copy_size + static_cast<int>(to_start)) <= to_base->length() && |
| 332 | (copy_size + static_cast<int>(from_start)) <= from_base->length()); |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 333 | if (copy_size == 0) return; |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 334 | FixedDoubleArray* from = FixedDoubleArray::cast(from_base); |
| 335 | FixedDoubleArray* to = FixedDoubleArray::cast(to_base); |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 336 | Address to_address = to->address() + FixedDoubleArray::kHeaderSize; |
| 337 | Address from_address = from->address() + FixedDoubleArray::kHeaderSize; |
| 338 | to_address += kDoubleSize * to_start; |
| 339 | from_address += kDoubleSize * from_start; |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 340 | int words_per_double = (kDoubleSize / kPointerSize); |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 341 | CopyWords(reinterpret_cast<Object**>(to_address), |
| 342 | reinterpret_cast<Object**>(from_address), |
mstarzinger@chromium.org | e27d617 | 2013-04-17 11:51:44 +0000 | [diff] [blame] | 343 | static_cast<size_t>(words_per_double * copy_size)); |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 344 | } |
| 345 | |
| 346 | |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 347 | static void CopySmiToDoubleElements(FixedArrayBase* from_base, |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 348 | uint32_t from_start, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 349 | FixedArrayBase* to_base, |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 350 | uint32_t to_start, |
| 351 | int raw_copy_size) { |
| 352 | int copy_size = raw_copy_size; |
| 353 | if (raw_copy_size < 0) { |
| 354 | ASSERT(raw_copy_size == ElementsAccessor::kCopyToEnd || |
| 355 | raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole); |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 356 | copy_size = from_base->length() - from_start; |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 357 | if (raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole) { |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 358 | for (int i = to_start + copy_size; i < to_base->length(); ++i) { |
| 359 | FixedDoubleArray::cast(to_base)->set_the_hole(i); |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 360 | } |
| 361 | } |
| 362 | } |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 363 | ASSERT((copy_size + static_cast<int>(to_start)) <= to_base->length() && |
| 364 | (copy_size + static_cast<int>(from_start)) <= from_base->length()); |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 365 | if (copy_size == 0) return; |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 366 | FixedArray* from = FixedArray::cast(from_base); |
| 367 | FixedDoubleArray* to = FixedDoubleArray::cast(to_base); |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 368 | Object* the_hole = from->GetHeap()->the_hole_value(); |
| 369 | for (uint32_t from_end = from_start + static_cast<uint32_t>(copy_size); |
| 370 | from_start < from_end; from_start++, to_start++) { |
| 371 | Object* hole_or_smi = from->get(from_start); |
| 372 | if (hole_or_smi == the_hole) { |
| 373 | to->set_the_hole(to_start); |
| 374 | } else { |
| 375 | to->set(to_start, Smi::cast(hole_or_smi)->value()); |
| 376 | } |
| 377 | } |
| 378 | } |
| 379 | |
| 380 | |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 381 | static void CopyPackedSmiToDoubleElements(FixedArrayBase* from_base, |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 382 | uint32_t from_start, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 383 | FixedArrayBase* to_base, |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 384 | uint32_t to_start, |
| 385 | int packed_size, |
| 386 | int raw_copy_size) { |
| 387 | int copy_size = raw_copy_size; |
| 388 | uint32_t to_end; |
| 389 | if (raw_copy_size < 0) { |
| 390 | ASSERT(raw_copy_size == ElementsAccessor::kCopyToEnd || |
| 391 | raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole); |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 392 | copy_size = packed_size - from_start; |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 393 | if (raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole) { |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 394 | to_end = to_base->length(); |
danno@chromium.org | 1f34ad3 | 2012-11-26 14:53:56 +0000 | [diff] [blame] | 395 | for (uint32_t i = to_start + copy_size; i < to_end; ++i) { |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 396 | FixedDoubleArray::cast(to_base)->set_the_hole(i); |
danno@chromium.org | 1f34ad3 | 2012-11-26 14:53:56 +0000 | [diff] [blame] | 397 | } |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 398 | } else { |
| 399 | to_end = to_start + static_cast<uint32_t>(copy_size); |
| 400 | } |
| 401 | } else { |
| 402 | to_end = to_start + static_cast<uint32_t>(copy_size); |
| 403 | } |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 404 | ASSERT(static_cast<int>(to_end) <= to_base->length()); |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 405 | ASSERT(packed_size >= 0 && packed_size <= copy_size); |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 406 | ASSERT((copy_size + static_cast<int>(to_start)) <= to_base->length() && |
| 407 | (copy_size + static_cast<int>(from_start)) <= from_base->length()); |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 408 | if (copy_size == 0) return; |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 409 | FixedArray* from = FixedArray::cast(from_base); |
| 410 | FixedDoubleArray* to = FixedDoubleArray::cast(to_base); |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 411 | for (uint32_t from_end = from_start + static_cast<uint32_t>(packed_size); |
| 412 | from_start < from_end; from_start++, to_start++) { |
| 413 | Object* smi = from->get(from_start); |
| 414 | ASSERT(!smi->IsTheHole()); |
| 415 | to->set(to_start, Smi::cast(smi)->value()); |
| 416 | } |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 417 | } |
| 418 | |
| 419 | |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 420 | static void CopyObjectToDoubleElements(FixedArrayBase* from_base, |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 421 | uint32_t from_start, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 422 | FixedArrayBase* to_base, |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 423 | uint32_t to_start, |
| 424 | int raw_copy_size) { |
| 425 | int copy_size = raw_copy_size; |
| 426 | if (raw_copy_size < 0) { |
| 427 | ASSERT(raw_copy_size == ElementsAccessor::kCopyToEnd || |
| 428 | raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole); |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 429 | copy_size = from_base->length() - from_start; |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 430 | if (raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole) { |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 431 | for (int i = to_start + copy_size; i < to_base->length(); ++i) { |
| 432 | FixedDoubleArray::cast(to_base)->set_the_hole(i); |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 433 | } |
| 434 | } |
| 435 | } |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 436 | ASSERT((copy_size + static_cast<int>(to_start)) <= to_base->length() && |
| 437 | (copy_size + static_cast<int>(from_start)) <= from_base->length()); |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 438 | if (copy_size == 0) return; |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 439 | FixedArray* from = FixedArray::cast(from_base); |
| 440 | FixedDoubleArray* to = FixedDoubleArray::cast(to_base); |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 441 | Object* the_hole = from->GetHeap()->the_hole_value(); |
| 442 | for (uint32_t from_end = from_start + copy_size; |
| 443 | from_start < from_end; from_start++, to_start++) { |
| 444 | Object* hole_or_object = from->get(from_start); |
| 445 | if (hole_or_object == the_hole) { |
| 446 | to->set_the_hole(to_start); |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 447 | } else { |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 448 | to->set(to_start, hole_or_object->Number()); |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 449 | } |
| 450 | } |
| 451 | } |
| 452 | |
| 453 | |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 454 | static void CopyDictionaryToDoubleElements(FixedArrayBase* from_base, |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 455 | uint32_t from_start, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 456 | FixedArrayBase* to_base, |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 457 | uint32_t to_start, |
| 458 | int raw_copy_size) { |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 459 | SeededNumberDictionary* from = SeededNumberDictionary::cast(from_base); |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 460 | int copy_size = raw_copy_size; |
| 461 | if (copy_size < 0) { |
| 462 | ASSERT(copy_size == ElementsAccessor::kCopyToEnd || |
| 463 | copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole); |
| 464 | copy_size = from->max_number_key() + 1 - from_start; |
| 465 | if (raw_copy_size == ElementsAccessor::kCopyToEndAndInitializeToHole) { |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 466 | for (int i = to_start + copy_size; i < to_base->length(); ++i) { |
| 467 | FixedDoubleArray::cast(to_base)->set_the_hole(i); |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 468 | } |
| 469 | } |
| 470 | } |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 471 | if (copy_size == 0) return; |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 472 | FixedDoubleArray* to = FixedDoubleArray::cast(to_base); |
danno@chromium.org | 8c0a43f | 2012-04-03 08:37:53 +0000 | [diff] [blame] | 473 | uint32_t to_length = to->length(); |
| 474 | if (to_start + copy_size > to_length) { |
| 475 | copy_size = to_length - to_start; |
| 476 | } |
rossberg@chromium.org | 2c067b1 | 2012-03-19 11:01:52 +0000 | [diff] [blame] | 477 | for (int i = 0; i < copy_size; i++) { |
| 478 | int entry = from->FindEntry(i + from_start); |
| 479 | if (entry != SeededNumberDictionary::kNotFound) { |
| 480 | to->set(i + to_start, from->ValueAt(entry)->Number()); |
| 481 | } else { |
| 482 | to->set_the_hole(i + to_start); |
| 483 | } |
| 484 | } |
| 485 | } |
| 486 | |
| 487 | |
yangguo@chromium.org | c03a192 | 2013-02-19 13:55:47 +0000 | [diff] [blame] | 488 | static void TraceTopFrame(Isolate* isolate) { |
| 489 | StackFrameIterator it(isolate); |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 490 | if (it.done()) { |
| 491 | PrintF("unknown location (no JavaScript frames present)"); |
| 492 | return; |
| 493 | } |
| 494 | StackFrame* raw_frame = it.frame(); |
| 495 | if (raw_frame->is_internal()) { |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 496 | Code* apply_builtin = isolate->builtins()->builtin( |
| 497 | Builtins::kFunctionApply); |
| 498 | if (raw_frame->unchecked_code() == apply_builtin) { |
| 499 | PrintF("apply from "); |
| 500 | it.Advance(); |
| 501 | raw_frame = it.frame(); |
| 502 | } |
| 503 | } |
yangguo@chromium.org | c03a192 | 2013-02-19 13:55:47 +0000 | [diff] [blame] | 504 | JavaScriptFrame::PrintTop(isolate, stdout, false, true); |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 505 | } |
| 506 | |
| 507 | |
| 508 | void CheckArrayAbuse(JSObject* obj, const char* op, uint32_t key, |
| 509 | bool allow_appending) { |
| 510 | Object* raw_length = NULL; |
| 511 | const char* elements_type = "array"; |
| 512 | if (obj->IsJSArray()) { |
| 513 | JSArray* array = JSArray::cast(obj); |
| 514 | raw_length = array->length(); |
| 515 | } else { |
| 516 | raw_length = Smi::FromInt(obj->elements()->length()); |
| 517 | elements_type = "object"; |
| 518 | } |
| 519 | |
| 520 | if (raw_length->IsNumber()) { |
| 521 | double n = raw_length->Number(); |
| 522 | if (FastI2D(FastD2UI(n)) == n) { |
| 523 | int32_t int32_length = DoubleToInt32(n); |
| 524 | uint32_t compare_length = static_cast<uint32_t>(int32_length); |
| 525 | if (allow_appending) compare_length++; |
| 526 | if (key >= compare_length) { |
| 527 | PrintF("[OOB %s %s (%s length = %d, element accessed = %d) in ", |
| 528 | elements_type, op, elements_type, |
| 529 | static_cast<int>(int32_length), |
| 530 | static_cast<int>(key)); |
yangguo@chromium.org | c03a192 | 2013-02-19 13:55:47 +0000 | [diff] [blame] | 531 | TraceTopFrame(obj->GetIsolate()); |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 532 | PrintF("]\n"); |
| 533 | } |
| 534 | } else { |
| 535 | PrintF("[%s elements length not integer value in ", elements_type); |
yangguo@chromium.org | c03a192 | 2013-02-19 13:55:47 +0000 | [diff] [blame] | 536 | TraceTopFrame(obj->GetIsolate()); |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 537 | PrintF("]\n"); |
| 538 | } |
| 539 | } else { |
| 540 | PrintF("[%s elements length not a number in ", elements_type); |
yangguo@chromium.org | c03a192 | 2013-02-19 13:55:47 +0000 | [diff] [blame] | 541 | TraceTopFrame(obj->GetIsolate()); |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 542 | PrintF("]\n"); |
| 543 | } |
| 544 | } |
| 545 | |
| 546 | |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 547 | // Base class for element handler implementations. Contains the |
| 548 | // the common logic for objects with different ElementsKinds. |
| 549 | // Subclasses must specialize method for which the element |
| 550 | // implementation differs from the base class implementation. |
| 551 | // |
| 552 | // This class is intended to be used in the following way: |
| 553 | // |
| 554 | // class SomeElementsAccessor : |
| 555 | // public ElementsAccessorBase<SomeElementsAccessor, |
| 556 | // BackingStoreClass> { |
| 557 | // ... |
| 558 | // } |
| 559 | // |
| 560 | // This is an example of the Curiously Recurring Template Pattern (see |
| 561 | // http://en.wikipedia.org/wiki/Curiously_recurring_template_pattern). We use |
| 562 | // CRTP to guarantee aggressive compile time optimizations (i.e. inlining and |
| 563 | // specialization of SomeElementsAccessor methods). |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 564 | template <typename ElementsAccessorSubclass, |
| 565 | typename ElementsTraitsParam> |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 566 | class ElementsAccessorBase : public ElementsAccessor { |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 567 | protected: |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 568 | explicit ElementsAccessorBase(const char* name) |
| 569 | : ElementsAccessor(name) { } |
| 570 | |
| 571 | typedef ElementsTraitsParam ElementsTraits; |
| 572 | typedef typename ElementsTraitsParam::BackingStore BackingStore; |
| 573 | |
| 574 | virtual ElementsKind kind() const { return ElementsTraits::Kind; } |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 575 | |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 576 | static void ValidateContents(JSObject* holder, int length) { |
| 577 | } |
| 578 | |
| 579 | static void ValidateImpl(JSObject* holder) { |
| 580 | FixedArrayBase* fixed_array_base = holder->elements(); |
| 581 | // When objects are first allocated, its elements are Failures. |
| 582 | if (fixed_array_base->IsFailure()) return; |
| 583 | if (!fixed_array_base->IsHeapObject()) return; |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 584 | // Arrays that have been shifted in place can't be verified. |
verwaest@chromium.org | ec6855e | 2013-08-22 12:26:58 +0000 | [diff] [blame] | 585 | if (fixed_array_base->IsFiller()) return; |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 586 | int length = 0; |
| 587 | if (holder->IsJSArray()) { |
| 588 | Object* length_obj = JSArray::cast(holder)->length(); |
| 589 | if (length_obj->IsSmi()) { |
| 590 | length = Smi::cast(length_obj)->value(); |
| 591 | } |
| 592 | } else { |
| 593 | length = fixed_array_base->length(); |
| 594 | } |
| 595 | ElementsAccessorSubclass::ValidateContents(holder, length); |
| 596 | } |
| 597 | |
| 598 | virtual void Validate(JSObject* holder) { |
| 599 | ElementsAccessorSubclass::ValidateImpl(holder); |
| 600 | } |
| 601 | |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 602 | static bool HasElementImpl(Object* receiver, |
| 603 | JSObject* holder, |
| 604 | uint32_t key, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 605 | FixedArrayBase* backing_store) { |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 606 | return ElementsAccessorSubclass::GetAttributesImpl( |
| 607 | receiver, holder, key, backing_store) != ABSENT; |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 608 | } |
| 609 | |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 610 | virtual bool HasElement(Object* receiver, |
| 611 | JSObject* holder, |
| 612 | uint32_t key, |
| 613 | FixedArrayBase* backing_store) { |
| 614 | if (backing_store == NULL) { |
| 615 | backing_store = holder->elements(); |
| 616 | } |
| 617 | return ElementsAccessorSubclass::HasElementImpl( |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 618 | receiver, holder, key, backing_store); |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 619 | } |
| 620 | |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 621 | MUST_USE_RESULT virtual MaybeObject* Get(Object* receiver, |
| 622 | JSObject* holder, |
| 623 | uint32_t key, |
| 624 | FixedArrayBase* backing_store) { |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 625 | if (backing_store == NULL) { |
| 626 | backing_store = holder->elements(); |
| 627 | } |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 628 | |
| 629 | if (!IsExternalArrayElementsKind(ElementsTraits::Kind) && |
| 630 | FLAG_trace_js_array_abuse) { |
| 631 | CheckArrayAbuse(holder, "elements read", key); |
| 632 | } |
| 633 | |
| 634 | if (IsExternalArrayElementsKind(ElementsTraits::Kind) && |
| 635 | FLAG_trace_external_array_abuse) { |
| 636 | CheckArrayAbuse(holder, "external elements read", key); |
| 637 | } |
| 638 | |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 639 | return ElementsAccessorSubclass::GetImpl( |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 640 | receiver, holder, key, backing_store); |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 641 | } |
| 642 | |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 643 | MUST_USE_RESULT static MaybeObject* GetImpl(Object* receiver, |
| 644 | JSObject* obj, |
| 645 | uint32_t key, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 646 | FixedArrayBase* backing_store) { |
jkummerow@chromium.org | f7a5884 | 2012-02-21 10:08:21 +0000 | [diff] [blame] | 647 | return (key < ElementsAccessorSubclass::GetCapacityImpl(backing_store)) |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 648 | ? BackingStore::cast(backing_store)->get(key) |
jkummerow@chromium.org | f7a5884 | 2012-02-21 10:08:21 +0000 | [diff] [blame] | 649 | : backing_store->GetHeap()->the_hole_value(); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 650 | } |
| 651 | |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 652 | MUST_USE_RESULT virtual PropertyAttributes GetAttributes( |
| 653 | Object* receiver, |
| 654 | JSObject* holder, |
| 655 | uint32_t key, |
| 656 | FixedArrayBase* backing_store) { |
| 657 | if (backing_store == NULL) { |
| 658 | backing_store = holder->elements(); |
| 659 | } |
| 660 | return ElementsAccessorSubclass::GetAttributesImpl( |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 661 | receiver, holder, key, backing_store); |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 662 | } |
| 663 | |
| 664 | MUST_USE_RESULT static PropertyAttributes GetAttributesImpl( |
| 665 | Object* receiver, |
| 666 | JSObject* obj, |
| 667 | uint32_t key, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 668 | FixedArrayBase* backing_store) { |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 669 | if (key >= ElementsAccessorSubclass::GetCapacityImpl(backing_store)) { |
| 670 | return ABSENT; |
| 671 | } |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 672 | return BackingStore::cast(backing_store)->is_the_hole(key) ? ABSENT : NONE; |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 673 | } |
| 674 | |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 675 | MUST_USE_RESULT virtual PropertyType GetType( |
| 676 | Object* receiver, |
| 677 | JSObject* holder, |
| 678 | uint32_t key, |
| 679 | FixedArrayBase* backing_store) { |
| 680 | if (backing_store == NULL) { |
| 681 | backing_store = holder->elements(); |
| 682 | } |
| 683 | return ElementsAccessorSubclass::GetTypeImpl( |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 684 | receiver, holder, key, backing_store); |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 685 | } |
| 686 | |
| 687 | MUST_USE_RESULT static PropertyType GetTypeImpl( |
| 688 | Object* receiver, |
| 689 | JSObject* obj, |
| 690 | uint32_t key, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 691 | FixedArrayBase* backing_store) { |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 692 | if (key >= ElementsAccessorSubclass::GetCapacityImpl(backing_store)) { |
| 693 | return NONEXISTENT; |
| 694 | } |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 695 | return BackingStore::cast(backing_store)->is_the_hole(key) |
| 696 | ? NONEXISTENT : FIELD; |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 697 | } |
| 698 | |
| 699 | MUST_USE_RESULT virtual AccessorPair* GetAccessorPair( |
| 700 | Object* receiver, |
| 701 | JSObject* holder, |
| 702 | uint32_t key, |
| 703 | FixedArrayBase* backing_store) { |
| 704 | if (backing_store == NULL) { |
| 705 | backing_store = holder->elements(); |
| 706 | } |
| 707 | return ElementsAccessorSubclass::GetAccessorPairImpl( |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 708 | receiver, holder, key, backing_store); |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 709 | } |
| 710 | |
| 711 | MUST_USE_RESULT static AccessorPair* GetAccessorPairImpl( |
| 712 | Object* receiver, |
| 713 | JSObject* obj, |
| 714 | uint32_t key, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 715 | FixedArrayBase* backing_store) { |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 716 | return NULL; |
| 717 | } |
| 718 | |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 719 | MUST_USE_RESULT virtual MaybeObject* SetLength(JSArray* array, |
| 720 | Object* length) { |
jkummerow@chromium.org | f7a5884 | 2012-02-21 10:08:21 +0000 | [diff] [blame] | 721 | return ElementsAccessorSubclass::SetLengthImpl( |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 722 | array, length, array->elements()); |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 723 | } |
| 724 | |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 725 | MUST_USE_RESULT static MaybeObject* SetLengthImpl( |
| 726 | JSObject* obj, |
| 727 | Object* length, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 728 | FixedArrayBase* backing_store); |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 729 | |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 730 | MUST_USE_RESULT virtual MaybeObject* SetCapacityAndLength( |
| 731 | JSArray* array, |
| 732 | int capacity, |
| 733 | int length) { |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 734 | return ElementsAccessorSubclass::SetFastElementsCapacityAndLength( |
| 735 | array, |
| 736 | capacity, |
| 737 | length); |
| 738 | } |
| 739 | |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 740 | MUST_USE_RESULT static MaybeObject* SetFastElementsCapacityAndLength( |
| 741 | JSObject* obj, |
| 742 | int capacity, |
| 743 | int length) { |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 744 | UNIMPLEMENTED(); |
| 745 | return obj; |
| 746 | } |
| 747 | |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 748 | MUST_USE_RESULT virtual MaybeObject* Delete(JSObject* obj, |
| 749 | uint32_t key, |
| 750 | JSReceiver::DeleteMode mode) = 0; |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 751 | |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 752 | MUST_USE_RESULT static MaybeObject* CopyElementsImpl(FixedArrayBase* from, |
| 753 | uint32_t from_start, |
| 754 | FixedArrayBase* to, |
yangguo@chromium.org | 4cd70b4 | 2013-01-04 08:57:54 +0000 | [diff] [blame] | 755 | ElementsKind from_kind, |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 756 | uint32_t to_start, |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 757 | int packed_size, |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 758 | int copy_size) { |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 759 | UNREACHABLE(); |
| 760 | return NULL; |
| 761 | } |
| 762 | |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 763 | MUST_USE_RESULT virtual MaybeObject* CopyElements(JSObject* from_holder, |
| 764 | uint32_t from_start, |
yangguo@chromium.org | 4cd70b4 | 2013-01-04 08:57:54 +0000 | [diff] [blame] | 765 | ElementsKind from_kind, |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 766 | FixedArrayBase* to, |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 767 | uint32_t to_start, |
| 768 | int copy_size, |
| 769 | FixedArrayBase* from) { |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 770 | int packed_size = kPackedSizeNotKnown; |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 771 | if (from == NULL) { |
| 772 | from = from_holder->elements(); |
| 773 | } |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 774 | |
| 775 | if (from_holder) { |
yangguo@chromium.org | 4cd70b4 | 2013-01-04 08:57:54 +0000 | [diff] [blame] | 776 | bool is_packed = IsFastPackedElementsKind(from_kind) && |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 777 | from_holder->IsJSArray(); |
| 778 | if (is_packed) { |
| 779 | packed_size = Smi::cast(JSArray::cast(from_holder)->length())->value(); |
| 780 | if (copy_size >= 0 && packed_size > copy_size) { |
| 781 | packed_size = copy_size; |
| 782 | } |
| 783 | } |
| 784 | } |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 785 | return ElementsAccessorSubclass::CopyElementsImpl( |
yangguo@chromium.org | 4cd70b4 | 2013-01-04 08:57:54 +0000 | [diff] [blame] | 786 | from, from_start, to, from_kind, to_start, packed_size, copy_size); |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 787 | } |
| 788 | |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 789 | MUST_USE_RESULT virtual MaybeObject* AddElementsToFixedArray( |
| 790 | Object* receiver, |
| 791 | JSObject* holder, |
| 792 | FixedArray* to, |
| 793 | FixedArrayBase* from) { |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 794 | int len0 = to->length(); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 795 | #ifdef DEBUG |
| 796 | if (FLAG_enable_slow_asserts) { |
| 797 | for (int i = 0; i < len0; i++) { |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 798 | ASSERT(!to->get(i)->IsTheHole()); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 799 | } |
| 800 | } |
| 801 | #endif |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 802 | if (from == NULL) { |
| 803 | from = holder->elements(); |
| 804 | } |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 805 | |
| 806 | // Optimize if 'other' is empty. |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 807 | // We cannot optimize if 'this' is empty, as other may have holes. |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 808 | uint32_t len1 = ElementsAccessorSubclass::GetCapacityImpl(from); |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 809 | if (len1 == 0) return to; |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 810 | |
| 811 | // Compute how many elements are not in other. |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 812 | uint32_t extra = 0; |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 813 | for (uint32_t y = 0; y < len1; y++) { |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 814 | uint32_t key = ElementsAccessorSubclass::GetKeyForIndexImpl(from, y); |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 815 | if (ElementsAccessorSubclass::HasElementImpl( |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 816 | receiver, holder, key, from)) { |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 817 | MaybeObject* maybe_value = |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 818 | ElementsAccessorSubclass::GetImpl(receiver, holder, key, from); |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 819 | Object* value; |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 820 | if (!maybe_value->To(&value)) return maybe_value; |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 821 | ASSERT(!value->IsTheHole()); |
| 822 | if (!HasKey(to, value)) { |
| 823 | extra++; |
| 824 | } |
| 825 | } |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 826 | } |
| 827 | |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 828 | if (extra == 0) return to; |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 829 | |
| 830 | // Allocate the result |
| 831 | FixedArray* result; |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 832 | MaybeObject* maybe_obj = from->GetHeap()->AllocateFixedArray(len0 + extra); |
| 833 | if (!maybe_obj->To(&result)) return maybe_obj; |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 834 | |
| 835 | // Fill in the content |
| 836 | { |
rossberg@chromium.org | 79e7902 | 2013-06-03 15:43:46 +0000 | [diff] [blame] | 837 | DisallowHeapAllocation no_gc; |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 838 | WriteBarrierMode mode = result->GetWriteBarrierMode(no_gc); |
| 839 | for (int i = 0; i < len0; i++) { |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 840 | Object* e = to->get(i); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 841 | ASSERT(e->IsString() || e->IsNumber()); |
| 842 | result->set(i, e, mode); |
| 843 | } |
| 844 | } |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 845 | // Fill in the extra values. |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 846 | uint32_t index = 0; |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 847 | for (uint32_t y = 0; y < len1; y++) { |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 848 | uint32_t key = |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 849 | ElementsAccessorSubclass::GetKeyForIndexImpl(from, y); |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 850 | if (ElementsAccessorSubclass::HasElementImpl( |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 851 | receiver, holder, key, from)) { |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 852 | MaybeObject* maybe_value = |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 853 | ElementsAccessorSubclass::GetImpl(receiver, holder, key, from); |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 854 | Object* value; |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 855 | if (!maybe_value->To(&value)) return maybe_value; |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 856 | if (!value->IsTheHole() && !HasKey(to, value)) { |
| 857 | result->set(len0 + index, value); |
| 858 | index++; |
| 859 | } |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 860 | } |
| 861 | } |
| 862 | ASSERT(extra == index); |
| 863 | return result; |
| 864 | } |
| 865 | |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 866 | protected: |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 867 | static uint32_t GetCapacityImpl(FixedArrayBase* backing_store) { |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 868 | return backing_store->length(); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 869 | } |
| 870 | |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 871 | virtual uint32_t GetCapacity(FixedArrayBase* backing_store) { |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 872 | return ElementsAccessorSubclass::GetCapacityImpl(backing_store); |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 873 | } |
| 874 | |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 875 | static uint32_t GetKeyForIndexImpl(FixedArrayBase* backing_store, |
jkummerow@chromium.org | f7a5884 | 2012-02-21 10:08:21 +0000 | [diff] [blame] | 876 | uint32_t index) { |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 877 | return index; |
| 878 | } |
| 879 | |
| 880 | virtual uint32_t GetKeyForIndex(FixedArrayBase* backing_store, |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 881 | uint32_t index) { |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 882 | return ElementsAccessorSubclass::GetKeyForIndexImpl(backing_store, index); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 883 | } |
| 884 | |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 885 | private: |
| 886 | DISALLOW_COPY_AND_ASSIGN(ElementsAccessorBase); |
| 887 | }; |
| 888 | |
| 889 | |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 890 | // Super class for all fast element arrays. |
| 891 | template<typename FastElementsAccessorSubclass, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 892 | typename KindTraits, |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 893 | int ElementSize> |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 894 | class FastElementsAccessor |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 895 | : public ElementsAccessorBase<FastElementsAccessorSubclass, KindTraits> { |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 896 | public: |
| 897 | explicit FastElementsAccessor(const char* name) |
| 898 | : ElementsAccessorBase<FastElementsAccessorSubclass, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 899 | KindTraits>(name) {} |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 900 | protected: |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 901 | friend class ElementsAccessorBase<FastElementsAccessorSubclass, KindTraits>; |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 902 | friend class NonStrictArgumentsElementsAccessor; |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 903 | |
| 904 | typedef typename KindTraits::BackingStore BackingStore; |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 905 | |
| 906 | // Adjusts the length of the fast backing store or returns the new length or |
| 907 | // undefined in case conversion to a slow backing store should be performed. |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 908 | static MaybeObject* SetLengthWithoutNormalize(FixedArrayBase* backing_store, |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 909 | JSArray* array, |
| 910 | Object* length_object, |
| 911 | uint32_t length) { |
| 912 | uint32_t old_capacity = backing_store->length(); |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 913 | Object* old_length = array->length(); |
verwaest@chromium.org | e4ee6de | 2012-11-06 12:13:00 +0000 | [diff] [blame] | 914 | bool same_or_smaller_size = old_length->IsSmi() && |
| 915 | static_cast<uint32_t>(Smi::cast(old_length)->value()) >= length; |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 916 | ElementsKind kind = array->GetElementsKind(); |
| 917 | |
verwaest@chromium.org | e4ee6de | 2012-11-06 12:13:00 +0000 | [diff] [blame] | 918 | if (!same_or_smaller_size && IsFastElementsKind(kind) && |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 919 | !IsFastHoleyElementsKind(kind)) { |
| 920 | kind = GetHoleyElementsKind(kind); |
| 921 | MaybeObject* maybe_obj = array->TransitionElementsKind(kind); |
| 922 | if (maybe_obj->IsFailure()) return maybe_obj; |
| 923 | } |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 924 | |
| 925 | // Check whether the backing store should be shrunk. |
| 926 | if (length <= old_capacity) { |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 927 | if (array->HasFastSmiOrObjectElements()) { |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 928 | MaybeObject* maybe_obj = array->EnsureWritableFastElements(); |
| 929 | if (!maybe_obj->To(&backing_store)) return maybe_obj; |
| 930 | } |
| 931 | if (2 * length <= old_capacity) { |
| 932 | // If more than half the elements won't be used, trim the array. |
| 933 | if (length == 0) { |
| 934 | array->initialize_elements(); |
| 935 | } else { |
| 936 | backing_store->set_length(length); |
| 937 | Address filler_start = backing_store->address() + |
| 938 | BackingStore::OffsetOfElementAt(length); |
| 939 | int filler_size = (old_capacity - length) * ElementSize; |
| 940 | array->GetHeap()->CreateFillerObjectAt(filler_start, filler_size); |
| 941 | } |
| 942 | } else { |
| 943 | // Otherwise, fill the unused tail with holes. |
ulan@chromium.org | ea52b5f | 2012-07-30 13:05:33 +0000 | [diff] [blame] | 944 | int old_length = FastD2IChecked(array->length()->Number()); |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 945 | for (int i = length; i < old_length; i++) { |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 946 | BackingStore::cast(backing_store)->set_the_hole(i); |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 947 | } |
| 948 | } |
| 949 | return length_object; |
| 950 | } |
| 951 | |
| 952 | // Check whether the backing store should be expanded. |
| 953 | uint32_t min = JSObject::NewElementsCapacity(old_capacity); |
| 954 | uint32_t new_capacity = length > min ? length : min; |
| 955 | if (!array->ShouldConvertToSlowElements(new_capacity)) { |
| 956 | MaybeObject* result = FastElementsAccessorSubclass:: |
| 957 | SetFastElementsCapacityAndLength(array, new_capacity, length); |
| 958 | if (result->IsFailure()) return result; |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 959 | array->ValidateElements(); |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 960 | return length_object; |
| 961 | } |
| 962 | |
| 963 | // Request conversion to slow elements. |
| 964 | return array->GetHeap()->undefined_value(); |
| 965 | } |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 966 | |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 967 | static MaybeObject* DeleteCommon(JSObject* obj, |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 968 | uint32_t key, |
| 969 | JSReceiver::DeleteMode mode) { |
| 970 | ASSERT(obj->HasFastSmiOrObjectElements() || |
| 971 | obj->HasFastDoubleElements() || |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 972 | obj->HasFastArgumentsElements()); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 973 | Heap* heap = obj->GetHeap(); |
verwaest@chromium.org | e4ee6de | 2012-11-06 12:13:00 +0000 | [diff] [blame] | 974 | Object* elements = obj->elements(); |
| 975 | if (elements == heap->empty_fixed_array()) { |
| 976 | return heap->true_value(); |
| 977 | } |
| 978 | typename KindTraits::BackingStore* backing_store = |
| 979 | KindTraits::BackingStore::cast(elements); |
| 980 | bool is_non_strict_arguments_elements_map = |
| 981 | backing_store->map() == heap->non_strict_arguments_elements_map(); |
| 982 | if (is_non_strict_arguments_elements_map) { |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 983 | backing_store = KindTraits::BackingStore::cast( |
| 984 | FixedArray::cast(backing_store)->get(1)); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 985 | } |
| 986 | uint32_t length = static_cast<uint32_t>( |
| 987 | obj->IsJSArray() |
| 988 | ? Smi::cast(JSArray::cast(obj)->length())->value() |
| 989 | : backing_store->length()); |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 990 | if (key < length) { |
verwaest@chromium.org | e4ee6de | 2012-11-06 12:13:00 +0000 | [diff] [blame] | 991 | if (!is_non_strict_arguments_elements_map) { |
| 992 | ElementsKind kind = KindTraits::Kind; |
| 993 | if (IsFastPackedElementsKind(kind)) { |
| 994 | MaybeObject* transitioned = |
| 995 | obj->TransitionElementsKind(GetHoleyElementsKind(kind)); |
| 996 | if (transitioned->IsFailure()) return transitioned; |
| 997 | } |
| 998 | if (IsFastSmiOrObjectElementsKind(KindTraits::Kind)) { |
| 999 | Object* writable; |
| 1000 | MaybeObject* maybe = obj->EnsureWritableFastElements(); |
| 1001 | if (!maybe->ToObject(&writable)) return maybe; |
| 1002 | backing_store = KindTraits::BackingStore::cast(writable); |
| 1003 | } |
| 1004 | } |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1005 | backing_store->set_the_hole(key); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1006 | // If an old space backing store is larger than a certain size and |
| 1007 | // has too few used values, normalize it. |
| 1008 | // To avoid doing the check on every delete we require at least |
| 1009 | // one adjacent hole to the value being deleted. |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1010 | const int kMinLengthForSparsenessCheck = 64; |
| 1011 | if (backing_store->length() >= kMinLengthForSparsenessCheck && |
| 1012 | !heap->InNewSpace(backing_store) && |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 1013 | ((key > 0 && backing_store->is_the_hole(key - 1)) || |
| 1014 | (key + 1 < length && backing_store->is_the_hole(key + 1)))) { |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1015 | int num_used = 0; |
| 1016 | for (int i = 0; i < backing_store->length(); ++i) { |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 1017 | if (!backing_store->is_the_hole(i)) ++num_used; |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1018 | // Bail out early if more than 1/4 is used. |
| 1019 | if (4 * num_used > backing_store->length()) break; |
| 1020 | } |
| 1021 | if (4 * num_used <= backing_store->length()) { |
| 1022 | MaybeObject* result = obj->NormalizeElements(); |
| 1023 | if (result->IsFailure()) return result; |
| 1024 | } |
| 1025 | } |
| 1026 | } |
| 1027 | return heap->true_value(); |
| 1028 | } |
| 1029 | |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 1030 | virtual MaybeObject* Delete(JSObject* obj, |
| 1031 | uint32_t key, |
| 1032 | JSReceiver::DeleteMode mode) { |
| 1033 | return DeleteCommon(obj, key, mode); |
| 1034 | } |
| 1035 | |
| 1036 | static bool HasElementImpl( |
| 1037 | Object* receiver, |
| 1038 | JSObject* holder, |
| 1039 | uint32_t key, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1040 | FixedArrayBase* backing_store) { |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 1041 | if (key >= static_cast<uint32_t>(backing_store->length())) { |
| 1042 | return false; |
| 1043 | } |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1044 | return !BackingStore::cast(backing_store)->is_the_hole(key); |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 1045 | } |
| 1046 | |
| 1047 | static void ValidateContents(JSObject* holder, int length) { |
| 1048 | #if DEBUG |
| 1049 | FixedArrayBase* elements = holder->elements(); |
| 1050 | Heap* heap = elements->GetHeap(); |
| 1051 | Map* map = elements->map(); |
| 1052 | ASSERT((IsFastSmiOrObjectElementsKind(KindTraits::Kind) && |
| 1053 | (map == heap->fixed_array_map() || |
| 1054 | map == heap->fixed_cow_array_map())) || |
| 1055 | (IsFastDoubleElementsKind(KindTraits::Kind) == |
| 1056 | ((map == heap->fixed_array_map() && length == 0) || |
| 1057 | map == heap->fixed_double_array_map()))); |
| 1058 | for (int i = 0; i < length; i++) { |
| 1059 | typename KindTraits::BackingStore* backing_store = |
| 1060 | KindTraits::BackingStore::cast(elements); |
| 1061 | ASSERT((!IsFastSmiElementsKind(KindTraits::Kind) || |
| 1062 | static_cast<Object*>(backing_store->get(i))->IsSmi()) || |
| 1063 | (IsFastHoleyElementsKind(KindTraits::Kind) == |
| 1064 | backing_store->is_the_hole(i))); |
| 1065 | } |
| 1066 | #endif |
| 1067 | } |
| 1068 | }; |
| 1069 | |
| 1070 | |
yangguo@chromium.org | 4cd70b4 | 2013-01-04 08:57:54 +0000 | [diff] [blame] | 1071 | static inline ElementsKind ElementsKindForArray(FixedArrayBase* array) { |
| 1072 | switch (array->map()->instance_type()) { |
| 1073 | case FIXED_ARRAY_TYPE: |
| 1074 | if (array->IsDictionary()) { |
| 1075 | return DICTIONARY_ELEMENTS; |
| 1076 | } else { |
| 1077 | return FAST_HOLEY_ELEMENTS; |
| 1078 | } |
| 1079 | case FIXED_DOUBLE_ARRAY_TYPE: |
| 1080 | return FAST_HOLEY_DOUBLE_ELEMENTS; |
| 1081 | case EXTERNAL_BYTE_ARRAY_TYPE: |
| 1082 | return EXTERNAL_BYTE_ELEMENTS; |
| 1083 | case EXTERNAL_UNSIGNED_BYTE_ARRAY_TYPE: |
| 1084 | return EXTERNAL_UNSIGNED_BYTE_ELEMENTS; |
| 1085 | case EXTERNAL_SHORT_ARRAY_TYPE: |
| 1086 | return EXTERNAL_SHORT_ELEMENTS; |
| 1087 | case EXTERNAL_UNSIGNED_SHORT_ARRAY_TYPE: |
| 1088 | return EXTERNAL_UNSIGNED_SHORT_ELEMENTS; |
| 1089 | case EXTERNAL_INT_ARRAY_TYPE: |
| 1090 | return EXTERNAL_INT_ELEMENTS; |
| 1091 | case EXTERNAL_UNSIGNED_INT_ARRAY_TYPE: |
| 1092 | return EXTERNAL_UNSIGNED_INT_ELEMENTS; |
| 1093 | case EXTERNAL_FLOAT_ARRAY_TYPE: |
| 1094 | return EXTERNAL_FLOAT_ELEMENTS; |
| 1095 | case EXTERNAL_DOUBLE_ARRAY_TYPE: |
| 1096 | return EXTERNAL_DOUBLE_ELEMENTS; |
| 1097 | case EXTERNAL_PIXEL_ARRAY_TYPE: |
| 1098 | return EXTERNAL_PIXEL_ELEMENTS; |
| 1099 | default: |
| 1100 | UNREACHABLE(); |
| 1101 | } |
| 1102 | return FAST_HOLEY_ELEMENTS; |
| 1103 | } |
| 1104 | |
| 1105 | |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 1106 | template<typename FastElementsAccessorSubclass, |
| 1107 | typename KindTraits> |
| 1108 | class FastSmiOrObjectElementsAccessor |
| 1109 | : public FastElementsAccessor<FastElementsAccessorSubclass, |
| 1110 | KindTraits, |
| 1111 | kPointerSize> { |
| 1112 | public: |
| 1113 | explicit FastSmiOrObjectElementsAccessor(const char* name) |
| 1114 | : FastElementsAccessor<FastElementsAccessorSubclass, |
| 1115 | KindTraits, |
| 1116 | kPointerSize>(name) {} |
| 1117 | |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1118 | static MaybeObject* CopyElementsImpl(FixedArrayBase* from, |
| 1119 | uint32_t from_start, |
| 1120 | FixedArrayBase* to, |
yangguo@chromium.org | 4cd70b4 | 2013-01-04 08:57:54 +0000 | [diff] [blame] | 1121 | ElementsKind from_kind, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1122 | uint32_t to_start, |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 1123 | int packed_size, |
danno@chromium.org | c740616 | 2012-03-26 09:46:02 +0000 | [diff] [blame] | 1124 | int copy_size) { |
yangguo@chromium.org | 4cd70b4 | 2013-01-04 08:57:54 +0000 | [diff] [blame] | 1125 | ElementsKind to_kind = KindTraits::Kind; |
| 1126 | switch (from_kind) { |
| 1127 | case FAST_SMI_ELEMENTS: |
| 1128 | case FAST_HOLEY_SMI_ELEMENTS: |
| 1129 | case FAST_ELEMENTS: |
| 1130 | case FAST_HOLEY_ELEMENTS: |
| 1131 | CopyObjectToObjectElements( |
| 1132 | from, from_kind, from_start, to, to_kind, to_start, copy_size); |
| 1133 | return to->GetHeap()->undefined_value(); |
| 1134 | case FAST_DOUBLE_ELEMENTS: |
| 1135 | case FAST_HOLEY_DOUBLE_ELEMENTS: |
| 1136 | return CopyDoubleToObjectElements( |
| 1137 | from, from_start, to, to_kind, to_start, copy_size); |
| 1138 | case DICTIONARY_ELEMENTS: |
| 1139 | CopyDictionaryToObjectElements( |
| 1140 | from, from_start, to, to_kind, to_start, copy_size); |
| 1141 | return to->GetHeap()->undefined_value(); |
| 1142 | case NON_STRICT_ARGUMENTS_ELEMENTS: { |
| 1143 | // TODO(verwaest): This is a temporary hack to support extending |
| 1144 | // NON_STRICT_ARGUMENTS_ELEMENTS in SetFastElementsCapacityAndLength. |
| 1145 | // This case should be UNREACHABLE(). |
| 1146 | FixedArray* parameter_map = FixedArray::cast(from); |
| 1147 | FixedArrayBase* arguments = FixedArrayBase::cast(parameter_map->get(1)); |
| 1148 | ElementsKind from_kind = ElementsKindForArray(arguments); |
| 1149 | return CopyElementsImpl(arguments, from_start, to, from_kind, |
| 1150 | to_start, packed_size, copy_size); |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 1151 | } |
yangguo@chromium.org | 4cd70b4 | 2013-01-04 08:57:54 +0000 | [diff] [blame] | 1152 | case EXTERNAL_BYTE_ELEMENTS: |
| 1153 | case EXTERNAL_UNSIGNED_BYTE_ELEMENTS: |
| 1154 | case EXTERNAL_SHORT_ELEMENTS: |
| 1155 | case EXTERNAL_UNSIGNED_SHORT_ELEMENTS: |
| 1156 | case EXTERNAL_INT_ELEMENTS: |
| 1157 | case EXTERNAL_UNSIGNED_INT_ELEMENTS: |
| 1158 | case EXTERNAL_FLOAT_ELEMENTS: |
| 1159 | case EXTERNAL_DOUBLE_ELEMENTS: |
| 1160 | case EXTERNAL_PIXEL_ELEMENTS: |
| 1161 | UNREACHABLE(); |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1162 | } |
yangguo@chromium.org | 4cd70b4 | 2013-01-04 08:57:54 +0000 | [diff] [blame] | 1163 | return NULL; |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1164 | } |
| 1165 | |
| 1166 | |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 1167 | static MaybeObject* SetFastElementsCapacityAndLength(JSObject* obj, |
| 1168 | uint32_t capacity, |
| 1169 | uint32_t length) { |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 1170 | JSObject::SetFastElementsCapacitySmiMode set_capacity_mode = |
| 1171 | obj->HasFastSmiElements() |
| 1172 | ? JSObject::kAllowSmiElements |
| 1173 | : JSObject::kDontAllowSmiElements; |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 1174 | return obj->SetFastElementsCapacityAndLength(capacity, |
| 1175 | length, |
| 1176 | set_capacity_mode); |
| 1177 | } |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1178 | }; |
| 1179 | |
| 1180 | |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 1181 | class FastPackedSmiElementsAccessor |
| 1182 | : public FastSmiOrObjectElementsAccessor< |
| 1183 | FastPackedSmiElementsAccessor, |
| 1184 | ElementsKindTraits<FAST_SMI_ELEMENTS> > { |
| 1185 | public: |
| 1186 | explicit FastPackedSmiElementsAccessor(const char* name) |
| 1187 | : FastSmiOrObjectElementsAccessor< |
| 1188 | FastPackedSmiElementsAccessor, |
| 1189 | ElementsKindTraits<FAST_SMI_ELEMENTS> >(name) {} |
| 1190 | }; |
| 1191 | |
| 1192 | |
| 1193 | class FastHoleySmiElementsAccessor |
| 1194 | : public FastSmiOrObjectElementsAccessor< |
| 1195 | FastHoleySmiElementsAccessor, |
| 1196 | ElementsKindTraits<FAST_HOLEY_SMI_ELEMENTS> > { |
| 1197 | public: |
| 1198 | explicit FastHoleySmiElementsAccessor(const char* name) |
| 1199 | : FastSmiOrObjectElementsAccessor< |
| 1200 | FastHoleySmiElementsAccessor, |
| 1201 | ElementsKindTraits<FAST_HOLEY_SMI_ELEMENTS> >(name) {} |
| 1202 | }; |
| 1203 | |
| 1204 | |
| 1205 | class FastPackedObjectElementsAccessor |
| 1206 | : public FastSmiOrObjectElementsAccessor< |
| 1207 | FastPackedObjectElementsAccessor, |
| 1208 | ElementsKindTraits<FAST_ELEMENTS> > { |
| 1209 | public: |
| 1210 | explicit FastPackedObjectElementsAccessor(const char* name) |
| 1211 | : FastSmiOrObjectElementsAccessor< |
| 1212 | FastPackedObjectElementsAccessor, |
| 1213 | ElementsKindTraits<FAST_ELEMENTS> >(name) {} |
| 1214 | }; |
| 1215 | |
| 1216 | |
| 1217 | class FastHoleyObjectElementsAccessor |
| 1218 | : public FastSmiOrObjectElementsAccessor< |
| 1219 | FastHoleyObjectElementsAccessor, |
| 1220 | ElementsKindTraits<FAST_HOLEY_ELEMENTS> > { |
| 1221 | public: |
| 1222 | explicit FastHoleyObjectElementsAccessor(const char* name) |
| 1223 | : FastSmiOrObjectElementsAccessor< |
| 1224 | FastHoleyObjectElementsAccessor, |
| 1225 | ElementsKindTraits<FAST_HOLEY_ELEMENTS> >(name) {} |
| 1226 | }; |
| 1227 | |
| 1228 | |
| 1229 | template<typename FastElementsAccessorSubclass, |
| 1230 | typename KindTraits> |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1231 | class FastDoubleElementsAccessor |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 1232 | : public FastElementsAccessor<FastElementsAccessorSubclass, |
| 1233 | KindTraits, |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 1234 | kDoubleSize> { |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1235 | public: |
| 1236 | explicit FastDoubleElementsAccessor(const char* name) |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 1237 | : FastElementsAccessor<FastElementsAccessorSubclass, |
| 1238 | KindTraits, |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1239 | kDoubleSize>(name) {} |
| 1240 | |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 1241 | static MaybeObject* SetFastElementsCapacityAndLength(JSObject* obj, |
| 1242 | uint32_t capacity, |
| 1243 | uint32_t length) { |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 1244 | return obj->SetFastDoubleElementsCapacityAndLength(capacity, |
| 1245 | length); |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame] | 1246 | } |
| 1247 | |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1248 | protected: |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1249 | static MaybeObject* CopyElementsImpl(FixedArrayBase* from, |
| 1250 | uint32_t from_start, |
| 1251 | FixedArrayBase* to, |
yangguo@chromium.org | 4cd70b4 | 2013-01-04 08:57:54 +0000 | [diff] [blame] | 1252 | ElementsKind from_kind, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1253 | uint32_t to_start, |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 1254 | int packed_size, |
danno@chromium.org | c740616 | 2012-03-26 09:46:02 +0000 | [diff] [blame] | 1255 | int copy_size) { |
yangguo@chromium.org | 4cd70b4 | 2013-01-04 08:57:54 +0000 | [diff] [blame] | 1256 | switch (from_kind) { |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 1257 | case FAST_SMI_ELEMENTS: |
yangguo@chromium.org | 4cd70b4 | 2013-01-04 08:57:54 +0000 | [diff] [blame] | 1258 | CopyPackedSmiToDoubleElements( |
| 1259 | from, from_start, to, to_start, packed_size, copy_size); |
| 1260 | break; |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 1261 | case FAST_HOLEY_SMI_ELEMENTS: |
yangguo@chromium.org | 4cd70b4 | 2013-01-04 08:57:54 +0000 | [diff] [blame] | 1262 | CopySmiToDoubleElements(from, from_start, to, to_start, copy_size); |
| 1263 | break; |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1264 | case FAST_DOUBLE_ELEMENTS: |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 1265 | case FAST_HOLEY_DOUBLE_ELEMENTS: |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1266 | CopyDoubleToDoubleElements(from, from_start, to, to_start, copy_size); |
yangguo@chromium.org | 4cd70b4 | 2013-01-04 08:57:54 +0000 | [diff] [blame] | 1267 | break; |
| 1268 | case FAST_ELEMENTS: |
| 1269 | case FAST_HOLEY_ELEMENTS: |
| 1270 | CopyObjectToDoubleElements(from, from_start, to, to_start, copy_size); |
| 1271 | break; |
| 1272 | case DICTIONARY_ELEMENTS: |
| 1273 | CopyDictionaryToDoubleElements( |
| 1274 | from, from_start, to, to_start, copy_size); |
| 1275 | break; |
| 1276 | case NON_STRICT_ARGUMENTS_ELEMENTS: |
| 1277 | case EXTERNAL_BYTE_ELEMENTS: |
| 1278 | case EXTERNAL_UNSIGNED_BYTE_ELEMENTS: |
| 1279 | case EXTERNAL_SHORT_ELEMENTS: |
| 1280 | case EXTERNAL_UNSIGNED_SHORT_ELEMENTS: |
| 1281 | case EXTERNAL_INT_ELEMENTS: |
| 1282 | case EXTERNAL_UNSIGNED_INT_ELEMENTS: |
| 1283 | case EXTERNAL_FLOAT_ELEMENTS: |
| 1284 | case EXTERNAL_DOUBLE_ELEMENTS: |
| 1285 | case EXTERNAL_PIXEL_ELEMENTS: |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1286 | UNREACHABLE(); |
| 1287 | } |
| 1288 | return to->GetHeap()->undefined_value(); |
| 1289 | } |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 1290 | }; |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1291 | |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1292 | |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 1293 | class FastPackedDoubleElementsAccessor |
| 1294 | : public FastDoubleElementsAccessor< |
| 1295 | FastPackedDoubleElementsAccessor, |
| 1296 | ElementsKindTraits<FAST_DOUBLE_ELEMENTS> > { |
| 1297 | public: |
| 1298 | friend class ElementsAccessorBase<FastPackedDoubleElementsAccessor, |
| 1299 | ElementsKindTraits<FAST_DOUBLE_ELEMENTS> >; |
| 1300 | explicit FastPackedDoubleElementsAccessor(const char* name) |
| 1301 | : FastDoubleElementsAccessor< |
| 1302 | FastPackedDoubleElementsAccessor, |
| 1303 | ElementsKindTraits<FAST_DOUBLE_ELEMENTS> >(name) {} |
| 1304 | }; |
| 1305 | |
| 1306 | |
| 1307 | class FastHoleyDoubleElementsAccessor |
| 1308 | : public FastDoubleElementsAccessor< |
| 1309 | FastHoleyDoubleElementsAccessor, |
| 1310 | ElementsKindTraits<FAST_HOLEY_DOUBLE_ELEMENTS> > { |
| 1311 | public: |
| 1312 | friend class ElementsAccessorBase< |
| 1313 | FastHoleyDoubleElementsAccessor, |
| 1314 | ElementsKindTraits<FAST_HOLEY_DOUBLE_ELEMENTS> >; |
| 1315 | explicit FastHoleyDoubleElementsAccessor(const char* name) |
| 1316 | : FastDoubleElementsAccessor< |
| 1317 | FastHoleyDoubleElementsAccessor, |
| 1318 | ElementsKindTraits<FAST_HOLEY_DOUBLE_ELEMENTS> >(name) {} |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1319 | }; |
| 1320 | |
| 1321 | |
| 1322 | // Super class for all external element arrays. |
| 1323 | template<typename ExternalElementsAccessorSubclass, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1324 | ElementsKind Kind> |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1325 | class ExternalElementsAccessor |
| 1326 | : public ElementsAccessorBase<ExternalElementsAccessorSubclass, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1327 | ElementsKindTraits<Kind> > { |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1328 | public: |
| 1329 | explicit ExternalElementsAccessor(const char* name) |
| 1330 | : ElementsAccessorBase<ExternalElementsAccessorSubclass, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1331 | ElementsKindTraits<Kind> >(name) {} |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1332 | |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1333 | protected: |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1334 | typedef typename ElementsKindTraits<Kind>::BackingStore BackingStore; |
| 1335 | |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1336 | friend class ElementsAccessorBase<ExternalElementsAccessorSubclass, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1337 | ElementsKindTraits<Kind> >; |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1338 | |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 1339 | MUST_USE_RESULT static MaybeObject* GetImpl(Object* receiver, |
| 1340 | JSObject* obj, |
| 1341 | uint32_t key, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1342 | FixedArrayBase* backing_store) { |
jkummerow@chromium.org | f7a5884 | 2012-02-21 10:08:21 +0000 | [diff] [blame] | 1343 | return |
| 1344 | key < ExternalElementsAccessorSubclass::GetCapacityImpl(backing_store) |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1345 | ? BackingStore::cast(backing_store)->get(key) |
jkummerow@chromium.org | f7a5884 | 2012-02-21 10:08:21 +0000 | [diff] [blame] | 1346 | : backing_store->GetHeap()->undefined_value(); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1347 | } |
| 1348 | |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 1349 | MUST_USE_RESULT static PropertyAttributes GetAttributesImpl( |
| 1350 | Object* receiver, |
| 1351 | JSObject* obj, |
| 1352 | uint32_t key, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1353 | FixedArrayBase* backing_store) { |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 1354 | return |
| 1355 | key < ExternalElementsAccessorSubclass::GetCapacityImpl(backing_store) |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1356 | ? NONE : ABSENT; |
| 1357 | } |
| 1358 | |
| 1359 | MUST_USE_RESULT static PropertyType GetTypeImpl( |
| 1360 | Object* receiver, |
| 1361 | JSObject* obj, |
| 1362 | uint32_t key, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1363 | FixedArrayBase* backing_store) { |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1364 | return |
| 1365 | key < ExternalElementsAccessorSubclass::GetCapacityImpl(backing_store) |
| 1366 | ? FIELD : NONEXISTENT; |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 1367 | } |
| 1368 | |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 1369 | MUST_USE_RESULT static MaybeObject* SetLengthImpl( |
| 1370 | JSObject* obj, |
| 1371 | Object* length, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1372 | FixedArrayBase* backing_store) { |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 1373 | // External arrays do not support changing their length. |
| 1374 | UNREACHABLE(); |
| 1375 | return obj; |
| 1376 | } |
| 1377 | |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 1378 | MUST_USE_RESULT virtual MaybeObject* Delete(JSObject* obj, |
| 1379 | uint32_t key, |
| 1380 | JSReceiver::DeleteMode mode) { |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1381 | // External arrays always ignore deletes. |
| 1382 | return obj->GetHeap()->true_value(); |
| 1383 | } |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 1384 | |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1385 | static bool HasElementImpl(Object* receiver, |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 1386 | JSObject* holder, |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1387 | uint32_t key, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1388 | FixedArrayBase* backing_store) { |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 1389 | uint32_t capacity = |
| 1390 | ExternalElementsAccessorSubclass::GetCapacityImpl(backing_store); |
| 1391 | return key < capacity; |
| 1392 | } |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1393 | }; |
| 1394 | |
| 1395 | |
| 1396 | class ExternalByteElementsAccessor |
| 1397 | : public ExternalElementsAccessor<ExternalByteElementsAccessor, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1398 | EXTERNAL_BYTE_ELEMENTS> { |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1399 | public: |
| 1400 | explicit ExternalByteElementsAccessor(const char* name) |
| 1401 | : ExternalElementsAccessor<ExternalByteElementsAccessor, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1402 | EXTERNAL_BYTE_ELEMENTS>(name) {} |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1403 | }; |
| 1404 | |
| 1405 | |
| 1406 | class ExternalUnsignedByteElementsAccessor |
| 1407 | : public ExternalElementsAccessor<ExternalUnsignedByteElementsAccessor, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1408 | EXTERNAL_UNSIGNED_BYTE_ELEMENTS> { |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1409 | public: |
| 1410 | explicit ExternalUnsignedByteElementsAccessor(const char* name) |
| 1411 | : ExternalElementsAccessor<ExternalUnsignedByteElementsAccessor, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1412 | EXTERNAL_UNSIGNED_BYTE_ELEMENTS>(name) {} |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1413 | }; |
| 1414 | |
| 1415 | |
| 1416 | class ExternalShortElementsAccessor |
| 1417 | : public ExternalElementsAccessor<ExternalShortElementsAccessor, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1418 | EXTERNAL_SHORT_ELEMENTS> { |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1419 | public: |
| 1420 | explicit ExternalShortElementsAccessor(const char* name) |
| 1421 | : ExternalElementsAccessor<ExternalShortElementsAccessor, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1422 | EXTERNAL_SHORT_ELEMENTS>(name) {} |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1423 | }; |
| 1424 | |
| 1425 | |
| 1426 | class ExternalUnsignedShortElementsAccessor |
| 1427 | : public ExternalElementsAccessor<ExternalUnsignedShortElementsAccessor, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1428 | EXTERNAL_UNSIGNED_SHORT_ELEMENTS> { |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1429 | public: |
| 1430 | explicit ExternalUnsignedShortElementsAccessor(const char* name) |
| 1431 | : ExternalElementsAccessor<ExternalUnsignedShortElementsAccessor, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1432 | EXTERNAL_UNSIGNED_SHORT_ELEMENTS>(name) {} |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1433 | }; |
| 1434 | |
| 1435 | |
| 1436 | class ExternalIntElementsAccessor |
| 1437 | : public ExternalElementsAccessor<ExternalIntElementsAccessor, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1438 | EXTERNAL_INT_ELEMENTS> { |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1439 | public: |
| 1440 | explicit ExternalIntElementsAccessor(const char* name) |
| 1441 | : ExternalElementsAccessor<ExternalIntElementsAccessor, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1442 | EXTERNAL_INT_ELEMENTS>(name) {} |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1443 | }; |
| 1444 | |
| 1445 | |
| 1446 | class ExternalUnsignedIntElementsAccessor |
| 1447 | : public ExternalElementsAccessor<ExternalUnsignedIntElementsAccessor, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1448 | EXTERNAL_UNSIGNED_INT_ELEMENTS> { |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1449 | public: |
| 1450 | explicit ExternalUnsignedIntElementsAccessor(const char* name) |
| 1451 | : ExternalElementsAccessor<ExternalUnsignedIntElementsAccessor, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1452 | EXTERNAL_UNSIGNED_INT_ELEMENTS>(name) {} |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1453 | }; |
| 1454 | |
| 1455 | |
| 1456 | class ExternalFloatElementsAccessor |
| 1457 | : public ExternalElementsAccessor<ExternalFloatElementsAccessor, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1458 | EXTERNAL_FLOAT_ELEMENTS> { |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1459 | public: |
| 1460 | explicit ExternalFloatElementsAccessor(const char* name) |
| 1461 | : ExternalElementsAccessor<ExternalFloatElementsAccessor, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1462 | EXTERNAL_FLOAT_ELEMENTS>(name) {} |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1463 | }; |
| 1464 | |
| 1465 | |
| 1466 | class ExternalDoubleElementsAccessor |
| 1467 | : public ExternalElementsAccessor<ExternalDoubleElementsAccessor, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1468 | EXTERNAL_DOUBLE_ELEMENTS> { |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1469 | public: |
| 1470 | explicit ExternalDoubleElementsAccessor(const char* name) |
| 1471 | : ExternalElementsAccessor<ExternalDoubleElementsAccessor, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1472 | EXTERNAL_DOUBLE_ELEMENTS>(name) {} |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1473 | }; |
| 1474 | |
| 1475 | |
| 1476 | class PixelElementsAccessor |
| 1477 | : public ExternalElementsAccessor<PixelElementsAccessor, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1478 | EXTERNAL_PIXEL_ELEMENTS> { |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1479 | public: |
| 1480 | explicit PixelElementsAccessor(const char* name) |
| 1481 | : ExternalElementsAccessor<PixelElementsAccessor, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1482 | EXTERNAL_PIXEL_ELEMENTS>(name) {} |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1483 | }; |
| 1484 | |
| 1485 | |
| 1486 | class DictionaryElementsAccessor |
| 1487 | : public ElementsAccessorBase<DictionaryElementsAccessor, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1488 | ElementsKindTraits<DICTIONARY_ELEMENTS> > { |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1489 | public: |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1490 | explicit DictionaryElementsAccessor(const char* name) |
| 1491 | : ElementsAccessorBase<DictionaryElementsAccessor, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1492 | ElementsKindTraits<DICTIONARY_ELEMENTS> >(name) {} |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1493 | |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 1494 | // Adjusts the length of the dictionary backing store and returns the new |
| 1495 | // length according to ES5 section 15.4.5.2 behavior. |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 1496 | MUST_USE_RESULT static MaybeObject* SetLengthWithoutNormalize( |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1497 | FixedArrayBase* store, |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 1498 | JSArray* array, |
| 1499 | Object* length_object, |
| 1500 | uint32_t length) { |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1501 | SeededNumberDictionary* dict = SeededNumberDictionary::cast(store); |
verwaest@chromium.org | 33e09c8 | 2012-10-10 17:07:22 +0000 | [diff] [blame] | 1502 | Heap* heap = array->GetHeap(); |
| 1503 | int capacity = dict->Capacity(); |
| 1504 | uint32_t new_length = length; |
| 1505 | uint32_t old_length = static_cast<uint32_t>(array->length()->Number()); |
| 1506 | if (new_length < old_length) { |
| 1507 | // Find last non-deletable element in range of elements to be |
| 1508 | // deleted and adjust range accordingly. |
| 1509 | for (int i = 0; i < capacity; i++) { |
| 1510 | Object* key = dict->KeyAt(i); |
| 1511 | if (key->IsNumber()) { |
| 1512 | uint32_t number = static_cast<uint32_t>(key->Number()); |
| 1513 | if (new_length <= number && number < old_length) { |
| 1514 | PropertyDetails details = dict->DetailsAt(i); |
| 1515 | if (details.IsDontDelete()) new_length = number + 1; |
| 1516 | } |
| 1517 | } |
| 1518 | } |
| 1519 | if (new_length != length) { |
| 1520 | MaybeObject* maybe_object = heap->NumberFromUint32(new_length); |
| 1521 | if (!maybe_object->To(&length_object)) return maybe_object; |
| 1522 | } |
| 1523 | } |
| 1524 | |
| 1525 | if (new_length == 0) { |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 1526 | // If the length of a slow array is reset to zero, we clear |
| 1527 | // the array and flush backing storage. This has the added |
| 1528 | // benefit that the array returns to fast mode. |
| 1529 | Object* obj; |
| 1530 | MaybeObject* maybe_obj = array->ResetElements(); |
| 1531 | if (!maybe_obj->ToObject(&obj)) return maybe_obj; |
| 1532 | } else { |
verwaest@chromium.org | 33e09c8 | 2012-10-10 17:07:22 +0000 | [diff] [blame] | 1533 | // Remove elements that should be deleted. |
| 1534 | int removed_entries = 0; |
| 1535 | Object* the_hole_value = heap->the_hole_value(); |
| 1536 | for (int i = 0; i < capacity; i++) { |
| 1537 | Object* key = dict->KeyAt(i); |
| 1538 | if (key->IsNumber()) { |
| 1539 | uint32_t number = static_cast<uint32_t>(key->Number()); |
| 1540 | if (new_length <= number && number < old_length) { |
| 1541 | dict->SetEntry(i, the_hole_value, the_hole_value); |
| 1542 | removed_entries++; |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 1543 | } |
| 1544 | } |
danno@chromium.org | 2ab0c3b | 2012-10-05 08:50:56 +0000 | [diff] [blame] | 1545 | } |
verwaest@chromium.org | 33e09c8 | 2012-10-10 17:07:22 +0000 | [diff] [blame] | 1546 | |
| 1547 | // Update the number of elements. |
| 1548 | dict->ElementsRemoved(removed_entries); |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 1549 | } |
| 1550 | return length_object; |
| 1551 | } |
| 1552 | |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 1553 | MUST_USE_RESULT static MaybeObject* DeleteCommon( |
| 1554 | JSObject* obj, |
| 1555 | uint32_t key, |
| 1556 | JSReceiver::DeleteMode mode) { |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1557 | Isolate* isolate = obj->GetIsolate(); |
| 1558 | Heap* heap = isolate->heap(); |
| 1559 | FixedArray* backing_store = FixedArray::cast(obj->elements()); |
| 1560 | bool is_arguments = |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 1561 | (obj->GetElementsKind() == NON_STRICT_ARGUMENTS_ELEMENTS); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1562 | if (is_arguments) { |
| 1563 | backing_store = FixedArray::cast(backing_store->get(1)); |
| 1564 | } |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 1565 | SeededNumberDictionary* dictionary = |
| 1566 | SeededNumberDictionary::cast(backing_store); |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1567 | int entry = dictionary->FindEntry(key); |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 1568 | if (entry != SeededNumberDictionary::kNotFound) { |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1569 | Object* result = dictionary->DeleteProperty(entry, mode); |
rossberg@chromium.org | 89e18f5 | 2012-10-22 13:09:53 +0000 | [diff] [blame] | 1570 | if (result == heap->false_value()) { |
| 1571 | if (mode == JSObject::STRICT_DELETION) { |
| 1572 | // Deleting a non-configurable property in strict mode. |
| 1573 | HandleScope scope(isolate); |
ulan@chromium.org | 09d7ab5 | 2013-02-25 15:50:35 +0000 | [diff] [blame] | 1574 | Handle<Object> holder(obj, isolate); |
rossberg@chromium.org | 89e18f5 | 2012-10-22 13:09:53 +0000 | [diff] [blame] | 1575 | Handle<Object> name = isolate->factory()->NewNumberFromUint(key); |
| 1576 | Handle<Object> args[2] = { name, holder }; |
| 1577 | Handle<Object> error = |
| 1578 | isolate->factory()->NewTypeError("strict_delete_property", |
| 1579 | HandleVector(args, 2)); |
| 1580 | return isolate->Throw(*error); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1581 | } |
rossberg@chromium.org | 89e18f5 | 2012-10-22 13:09:53 +0000 | [diff] [blame] | 1582 | return heap->false_value(); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1583 | } |
rossberg@chromium.org | 89e18f5 | 2012-10-22 13:09:53 +0000 | [diff] [blame] | 1584 | MaybeObject* maybe_elements = dictionary->Shrink(key); |
| 1585 | FixedArray* new_elements = NULL; |
| 1586 | if (!maybe_elements->To(&new_elements)) { |
| 1587 | return maybe_elements; |
| 1588 | } |
| 1589 | if (is_arguments) { |
| 1590 | FixedArray::cast(obj->elements())->set(1, new_elements); |
| 1591 | } else { |
| 1592 | obj->set_elements(new_elements); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1593 | } |
| 1594 | } |
| 1595 | return heap->true_value(); |
| 1596 | } |
| 1597 | |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 1598 | MUST_USE_RESULT static MaybeObject* CopyElementsImpl(FixedArrayBase* from, |
| 1599 | uint32_t from_start, |
| 1600 | FixedArrayBase* to, |
yangguo@chromium.org | 4cd70b4 | 2013-01-04 08:57:54 +0000 | [diff] [blame] | 1601 | ElementsKind from_kind, |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 1602 | uint32_t to_start, |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 1603 | int packed_size, |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 1604 | int copy_size) { |
yangguo@chromium.org | 4cd70b4 | 2013-01-04 08:57:54 +0000 | [diff] [blame] | 1605 | UNREACHABLE(); |
| 1606 | return NULL; |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1607 | } |
| 1608 | |
| 1609 | |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1610 | protected: |
| 1611 | friend class ElementsAccessorBase<DictionaryElementsAccessor, |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1612 | ElementsKindTraits<DICTIONARY_ELEMENTS> >; |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1613 | |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 1614 | MUST_USE_RESULT virtual MaybeObject* Delete(JSObject* obj, |
| 1615 | uint32_t key, |
| 1616 | JSReceiver::DeleteMode mode) { |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1617 | return DeleteCommon(obj, key, mode); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1618 | } |
| 1619 | |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 1620 | MUST_USE_RESULT static MaybeObject* GetImpl( |
| 1621 | Object* receiver, |
| 1622 | JSObject* obj, |
| 1623 | uint32_t key, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1624 | FixedArrayBase* store) { |
| 1625 | SeededNumberDictionary* backing_store = SeededNumberDictionary::cast(store); |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1626 | int entry = backing_store->FindEntry(key); |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 1627 | if (entry != SeededNumberDictionary::kNotFound) { |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1628 | Object* element = backing_store->ValueAt(entry); |
| 1629 | PropertyDetails details = backing_store->DetailsAt(entry); |
| 1630 | if (details.type() == CALLBACKS) { |
| 1631 | return obj->GetElementWithCallback(receiver, |
| 1632 | element, |
| 1633 | key, |
| 1634 | obj); |
| 1635 | } else { |
| 1636 | return element; |
| 1637 | } |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1638 | } |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1639 | return obj->GetHeap()->the_hole_value(); |
| 1640 | } |
| 1641 | |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 1642 | MUST_USE_RESULT static PropertyAttributes GetAttributesImpl( |
| 1643 | Object* receiver, |
| 1644 | JSObject* obj, |
| 1645 | uint32_t key, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1646 | FixedArrayBase* backing_store) { |
| 1647 | SeededNumberDictionary* dictionary = |
| 1648 | SeededNumberDictionary::cast(backing_store); |
| 1649 | int entry = dictionary->FindEntry(key); |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 1650 | if (entry != SeededNumberDictionary::kNotFound) { |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1651 | return dictionary->DetailsAt(entry).attributes(); |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 1652 | } |
| 1653 | return ABSENT; |
| 1654 | } |
| 1655 | |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1656 | MUST_USE_RESULT static PropertyType GetTypeImpl( |
| 1657 | Object* receiver, |
| 1658 | JSObject* obj, |
| 1659 | uint32_t key, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1660 | FixedArrayBase* store) { |
| 1661 | SeededNumberDictionary* backing_store = SeededNumberDictionary::cast(store); |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1662 | int entry = backing_store->FindEntry(key); |
| 1663 | if (entry != SeededNumberDictionary::kNotFound) { |
| 1664 | return backing_store->DetailsAt(entry).type(); |
| 1665 | } |
| 1666 | return NONEXISTENT; |
| 1667 | } |
| 1668 | |
| 1669 | MUST_USE_RESULT static AccessorPair* GetAccessorPairImpl( |
| 1670 | Object* receiver, |
| 1671 | JSObject* obj, |
| 1672 | uint32_t key, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1673 | FixedArrayBase* store) { |
| 1674 | SeededNumberDictionary* backing_store = SeededNumberDictionary::cast(store); |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1675 | int entry = backing_store->FindEntry(key); |
| 1676 | if (entry != SeededNumberDictionary::kNotFound && |
| 1677 | backing_store->DetailsAt(entry).type() == CALLBACKS && |
| 1678 | backing_store->ValueAt(entry)->IsAccessorPair()) { |
| 1679 | return AccessorPair::cast(backing_store->ValueAt(entry)); |
| 1680 | } |
| 1681 | return NULL; |
| 1682 | } |
| 1683 | |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1684 | static bool HasElementImpl(Object* receiver, |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 1685 | JSObject* holder, |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1686 | uint32_t key, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1687 | FixedArrayBase* backing_store) { |
| 1688 | return SeededNumberDictionary::cast(backing_store)->FindEntry(key) != |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 1689 | SeededNumberDictionary::kNotFound; |
| 1690 | } |
| 1691 | |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1692 | static uint32_t GetKeyForIndexImpl(FixedArrayBase* store, |
jkummerow@chromium.org | f7a5884 | 2012-02-21 10:08:21 +0000 | [diff] [blame] | 1693 | uint32_t index) { |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1694 | SeededNumberDictionary* dict = SeededNumberDictionary::cast(store); |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1695 | Object* key = dict->KeyAt(index); |
| 1696 | return Smi::cast(key)->value(); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1697 | } |
| 1698 | }; |
| 1699 | |
| 1700 | |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1701 | class NonStrictArgumentsElementsAccessor : public ElementsAccessorBase< |
| 1702 | NonStrictArgumentsElementsAccessor, |
| 1703 | ElementsKindTraits<NON_STRICT_ARGUMENTS_ELEMENTS> > { |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1704 | public: |
| 1705 | explicit NonStrictArgumentsElementsAccessor(const char* name) |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1706 | : ElementsAccessorBase< |
| 1707 | NonStrictArgumentsElementsAccessor, |
| 1708 | ElementsKindTraits<NON_STRICT_ARGUMENTS_ELEMENTS> >(name) {} |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1709 | protected: |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1710 | friend class ElementsAccessorBase< |
| 1711 | NonStrictArgumentsElementsAccessor, |
| 1712 | ElementsKindTraits<NON_STRICT_ARGUMENTS_ELEMENTS> >; |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1713 | |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 1714 | MUST_USE_RESULT static MaybeObject* GetImpl(Object* receiver, |
| 1715 | JSObject* obj, |
| 1716 | uint32_t key, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1717 | FixedArrayBase* parameters) { |
| 1718 | FixedArray* parameter_map = FixedArray::cast(parameters); |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 1719 | Object* probe = GetParameterMapArg(obj, parameter_map, key); |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1720 | if (!probe->IsTheHole()) { |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1721 | Context* context = Context::cast(parameter_map->get(0)); |
| 1722 | int context_index = Smi::cast(probe)->value(); |
| 1723 | ASSERT(!context->get(context_index)->IsTheHole()); |
| 1724 | return context->get(context_index); |
| 1725 | } else { |
| 1726 | // Object is not mapped, defer to the arguments. |
| 1727 | FixedArray* arguments = FixedArray::cast(parameter_map->get(1)); |
yangguo@chromium.org | ab30bb8 | 2012-02-24 14:41:46 +0000 | [diff] [blame] | 1728 | MaybeObject* maybe_result = ElementsAccessor::ForArray(arguments)->Get( |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1729 | receiver, obj, key, arguments); |
yangguo@chromium.org | ab30bb8 | 2012-02-24 14:41:46 +0000 | [diff] [blame] | 1730 | Object* result; |
| 1731 | if (!maybe_result->ToObject(&result)) return maybe_result; |
| 1732 | // Elements of the arguments object in slow mode might be slow aliases. |
| 1733 | if (result->IsAliasedArgumentsEntry()) { |
| 1734 | AliasedArgumentsEntry* entry = AliasedArgumentsEntry::cast(result); |
| 1735 | Context* context = Context::cast(parameter_map->get(0)); |
| 1736 | int context_index = entry->aliased_context_slot(); |
| 1737 | ASSERT(!context->get(context_index)->IsTheHole()); |
| 1738 | return context->get(context_index); |
| 1739 | } else { |
| 1740 | return result; |
| 1741 | } |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1742 | } |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1743 | } |
| 1744 | |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 1745 | MUST_USE_RESULT static PropertyAttributes GetAttributesImpl( |
| 1746 | Object* receiver, |
| 1747 | JSObject* obj, |
| 1748 | uint32_t key, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1749 | FixedArrayBase* backing_store) { |
| 1750 | FixedArray* parameter_map = FixedArray::cast(backing_store); |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 1751 | Object* probe = GetParameterMapArg(obj, parameter_map, key); |
| 1752 | if (!probe->IsTheHole()) { |
| 1753 | return NONE; |
| 1754 | } else { |
| 1755 | // If not aliased, check the arguments. |
| 1756 | FixedArray* arguments = FixedArray::cast(parameter_map->get(1)); |
| 1757 | return ElementsAccessor::ForArray(arguments)->GetAttributes( |
| 1758 | receiver, obj, key, arguments); |
| 1759 | } |
| 1760 | } |
| 1761 | |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1762 | MUST_USE_RESULT static PropertyType GetTypeImpl( |
| 1763 | Object* receiver, |
| 1764 | JSObject* obj, |
| 1765 | uint32_t key, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1766 | FixedArrayBase* parameters) { |
| 1767 | FixedArray* parameter_map = FixedArray::cast(parameters); |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1768 | Object* probe = GetParameterMapArg(obj, parameter_map, key); |
| 1769 | if (!probe->IsTheHole()) { |
| 1770 | return FIELD; |
| 1771 | } else { |
| 1772 | // If not aliased, check the arguments. |
| 1773 | FixedArray* arguments = FixedArray::cast(parameter_map->get(1)); |
| 1774 | return ElementsAccessor::ForArray(arguments)->GetType( |
| 1775 | receiver, obj, key, arguments); |
| 1776 | } |
| 1777 | } |
| 1778 | |
| 1779 | MUST_USE_RESULT static AccessorPair* GetAccessorPairImpl( |
| 1780 | Object* receiver, |
| 1781 | JSObject* obj, |
| 1782 | uint32_t key, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1783 | FixedArrayBase* parameters) { |
| 1784 | FixedArray* parameter_map = FixedArray::cast(parameters); |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 1785 | Object* probe = GetParameterMapArg(obj, parameter_map, key); |
| 1786 | if (!probe->IsTheHole()) { |
| 1787 | return NULL; |
| 1788 | } else { |
| 1789 | // If not aliased, check the arguments. |
| 1790 | FixedArray* arguments = FixedArray::cast(parameter_map->get(1)); |
| 1791 | return ElementsAccessor::ForArray(arguments)->GetAccessorPair( |
| 1792 | receiver, obj, key, arguments); |
| 1793 | } |
| 1794 | } |
| 1795 | |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 1796 | MUST_USE_RESULT static MaybeObject* SetLengthImpl( |
| 1797 | JSObject* obj, |
| 1798 | Object* length, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1799 | FixedArrayBase* parameter_map) { |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 1800 | // TODO(mstarzinger): This was never implemented but will be used once we |
| 1801 | // correctly implement [[DefineOwnProperty]] on arrays. |
| 1802 | UNIMPLEMENTED(); |
| 1803 | return obj; |
| 1804 | } |
| 1805 | |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 1806 | MUST_USE_RESULT virtual MaybeObject* Delete(JSObject* obj, |
| 1807 | uint32_t key, |
| 1808 | JSReceiver::DeleteMode mode) { |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1809 | FixedArray* parameter_map = FixedArray::cast(obj->elements()); |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 1810 | Object* probe = GetParameterMapArg(obj, parameter_map, key); |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1811 | if (!probe->IsTheHole()) { |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1812 | // TODO(kmillikin): We could check if this was the last aliased |
| 1813 | // parameter, and revert to normal elements in that case. That |
| 1814 | // would enable GC of the context. |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1815 | parameter_map->set_the_hole(key + 2); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1816 | } else { |
| 1817 | FixedArray* arguments = FixedArray::cast(parameter_map->get(1)); |
| 1818 | if (arguments->IsDictionary()) { |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1819 | return DictionaryElementsAccessor::DeleteCommon(obj, key, mode); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1820 | } else { |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 1821 | // It's difficult to access the version of DeleteCommon that is declared |
| 1822 | // in the templatized super class, call the concrete implementation in |
| 1823 | // the class for the most generalized ElementsKind subclass. |
| 1824 | return FastHoleyObjectElementsAccessor::DeleteCommon(obj, key, mode); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1825 | } |
| 1826 | } |
| 1827 | return obj->GetHeap()->true_value(); |
| 1828 | } |
| 1829 | |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 1830 | MUST_USE_RESULT static MaybeObject* CopyElementsImpl(FixedArrayBase* from, |
| 1831 | uint32_t from_start, |
| 1832 | FixedArrayBase* to, |
yangguo@chromium.org | 4cd70b4 | 2013-01-04 08:57:54 +0000 | [diff] [blame] | 1833 | ElementsKind from_kind, |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 1834 | uint32_t to_start, |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 1835 | int packed_size, |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 1836 | int copy_size) { |
yangguo@chromium.org | 4cd70b4 | 2013-01-04 08:57:54 +0000 | [diff] [blame] | 1837 | UNREACHABLE(); |
| 1838 | return NULL; |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1839 | } |
| 1840 | |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1841 | static uint32_t GetCapacityImpl(FixedArrayBase* backing_store) { |
| 1842 | FixedArray* parameter_map = FixedArray::cast(backing_store); |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1843 | FixedArrayBase* arguments = FixedArrayBase::cast(parameter_map->get(1)); |
| 1844 | return Max(static_cast<uint32_t>(parameter_map->length() - 2), |
| 1845 | ForArray(arguments)->GetCapacity(arguments)); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1846 | } |
| 1847 | |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1848 | static uint32_t GetKeyForIndexImpl(FixedArrayBase* dict, |
jkummerow@chromium.org | f7a5884 | 2012-02-21 10:08:21 +0000 | [diff] [blame] | 1849 | uint32_t index) { |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1850 | return index; |
| 1851 | } |
| 1852 | |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1853 | static bool HasElementImpl(Object* receiver, |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 1854 | JSObject* holder, |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1855 | uint32_t key, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1856 | FixedArrayBase* parameters) { |
| 1857 | FixedArray* parameter_map = FixedArray::cast(parameters); |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 1858 | Object* probe = GetParameterMapArg(holder, parameter_map, key); |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1859 | if (!probe->IsTheHole()) { |
| 1860 | return true; |
| 1861 | } else { |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1862 | FixedArrayBase* arguments = |
| 1863 | FixedArrayBase::cast(FixedArray::cast(parameter_map)->get(1)); |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1864 | ElementsAccessor* accessor = ElementsAccessor::ForArray(arguments); |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1865 | return !accessor->Get(receiver, holder, key, arguments)->IsTheHole(); |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1866 | } |
| 1867 | } |
| 1868 | |
| 1869 | private: |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 1870 | static Object* GetParameterMapArg(JSObject* holder, |
| 1871 | FixedArray* parameter_map, |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1872 | uint32_t key) { |
ulan@chromium.org | 9a21ec4 | 2012-03-06 08:42:24 +0000 | [diff] [blame] | 1873 | uint32_t length = holder->IsJSArray() |
| 1874 | ? Smi::cast(JSArray::cast(holder)->length())->value() |
| 1875 | : parameter_map->length(); |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1876 | return key < (length - 2) |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1877 | ? parameter_map->get(key + 2) |
| 1878 | : parameter_map->GetHeap()->the_hole_value(); |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1879 | } |
| 1880 | }; |
| 1881 | |
| 1882 | |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1883 | ElementsAccessor* ElementsAccessor::ForArray(FixedArrayBase* array) { |
yangguo@chromium.org | 4cd70b4 | 2013-01-04 08:57:54 +0000 | [diff] [blame] | 1884 | return elements_accessors_[ElementsKindForArray(array)]; |
rossberg@chromium.org | 28a3708 | 2011-08-22 11:03:23 +0000 | [diff] [blame] | 1885 | } |
| 1886 | |
| 1887 | |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1888 | void ElementsAccessor::InitializeOncePerProcess() { |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1889 | static ElementsAccessor* accessor_array[] = { |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 1890 | #define ACCESSOR_ARRAY(Class, Kind, Store) new Class(#Kind), |
erikcorry | 0ad885c | 2011-11-21 13:51:57 +0000 | [diff] [blame] | 1891 | ELEMENTS_LIST(ACCESSOR_ARRAY) |
| 1892 | #undef ACCESSOR_ARRAY |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1893 | }; |
| 1894 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1895 | STATIC_ASSERT((sizeof(accessor_array) / sizeof(*accessor_array)) == |
| 1896 | kElementsKindCount); |
| 1897 | |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 1898 | elements_accessors_ = accessor_array; |
| 1899 | } |
| 1900 | |
| 1901 | |
jkummerow@chromium.org | 1456e70 | 2012-03-30 08:38:13 +0000 | [diff] [blame] | 1902 | void ElementsAccessor::TearDown() { |
| 1903 | #define ACCESSOR_DELETE(Class, Kind, Store) delete elements_accessors_[Kind]; |
| 1904 | ELEMENTS_LIST(ACCESSOR_DELETE) |
| 1905 | #undef ACCESSOR_DELETE |
| 1906 | elements_accessors_ = NULL; |
| 1907 | } |
| 1908 | |
| 1909 | |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1910 | template <typename ElementsAccessorSubclass, typename ElementsKindTraits> |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 1911 | MUST_USE_RESULT MaybeObject* ElementsAccessorBase<ElementsAccessorSubclass, |
| 1912 | ElementsKindTraits>:: |
erik.corry@gmail.com | bbceb57 | 2012-03-09 10:52:05 +0000 | [diff] [blame] | 1913 | SetLengthImpl(JSObject* obj, |
| 1914 | Object* length, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1915 | FixedArrayBase* backing_store) { |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 1916 | JSArray* array = JSArray::cast(obj); |
| 1917 | |
| 1918 | // Fast case: The new length fits into a Smi. |
| 1919 | MaybeObject* maybe_smi_length = length->ToSmi(); |
| 1920 | Object* smi_length = Smi::FromInt(0); |
| 1921 | if (maybe_smi_length->ToObject(&smi_length) && smi_length->IsSmi()) { |
| 1922 | const int value = Smi::cast(smi_length)->value(); |
| 1923 | if (value >= 0) { |
| 1924 | Object* new_length; |
| 1925 | MaybeObject* result = ElementsAccessorSubclass:: |
| 1926 | SetLengthWithoutNormalize(backing_store, array, smi_length, value); |
| 1927 | if (!result->ToObject(&new_length)) return result; |
| 1928 | ASSERT(new_length->IsSmi() || new_length->IsUndefined()); |
| 1929 | if (new_length->IsSmi()) { |
| 1930 | array->set_length(Smi::cast(new_length)); |
| 1931 | return array; |
| 1932 | } |
| 1933 | } else { |
| 1934 | return ThrowArrayLengthRangeError(array->GetHeap()); |
| 1935 | } |
| 1936 | } |
| 1937 | |
| 1938 | // Slow case: The new length does not fit into a Smi or conversion |
| 1939 | // to slow elements is needed for other reasons. |
| 1940 | if (length->IsNumber()) { |
| 1941 | uint32_t value; |
| 1942 | if (length->ToArrayIndex(&value)) { |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 1943 | SeededNumberDictionary* dictionary; |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 1944 | MaybeObject* maybe_object = array->NormalizeElements(); |
| 1945 | if (!maybe_object->To(&dictionary)) return maybe_object; |
| 1946 | Object* new_length; |
| 1947 | MaybeObject* result = DictionaryElementsAccessor:: |
| 1948 | SetLengthWithoutNormalize(dictionary, array, length, value); |
| 1949 | if (!result->ToObject(&new_length)) return result; |
| 1950 | ASSERT(new_length->IsNumber()); |
| 1951 | array->set_length(new_length); |
| 1952 | return array; |
| 1953 | } else { |
| 1954 | return ThrowArrayLengthRangeError(array->GetHeap()); |
| 1955 | } |
| 1956 | } |
| 1957 | |
| 1958 | // Fall-back case: The new length is not a number so make the array |
| 1959 | // size one and set only element to length. |
| 1960 | FixedArray* new_backing_store; |
| 1961 | MaybeObject* maybe_obj = array->GetHeap()->AllocateFixedArray(1); |
| 1962 | if (!maybe_obj->To(&new_backing_store)) return maybe_obj; |
| 1963 | new_backing_store->set(0, length); |
jkummerow@chromium.org | f7a5884 | 2012-02-21 10:08:21 +0000 | [diff] [blame] | 1964 | { MaybeObject* result = array->SetContent(new_backing_store); |
| 1965 | if (result->IsFailure()) return result; |
| 1966 | } |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 1967 | return array; |
| 1968 | } |
| 1969 | |
| 1970 | |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 1971 | MUST_USE_RESULT MaybeObject* ArrayConstructInitializeElements( |
| 1972 | JSArray* array, Arguments* args) { |
| 1973 | Heap* heap = array->GetIsolate()->heap(); |
| 1974 | |
| 1975 | // Optimize the case where there is one argument and the argument is a |
| 1976 | // small smi. |
| 1977 | if (args->length() == 1) { |
| 1978 | Object* obj = (*args)[0]; |
| 1979 | if (obj->IsSmi()) { |
| 1980 | int len = Smi::cast(obj)->value(); |
| 1981 | if (len > 0 && len < JSObject::kInitialMaxFastElementArray) { |
| 1982 | ElementsKind elements_kind = array->GetElementsKind(); |
| 1983 | MaybeObject* maybe_array = array->Initialize(len, len); |
| 1984 | if (maybe_array->IsFailure()) return maybe_array; |
| 1985 | |
| 1986 | if (!IsFastHoleyElementsKind(elements_kind)) { |
| 1987 | elements_kind = GetHoleyElementsKind(elements_kind); |
| 1988 | maybe_array = array->TransitionElementsKind(elements_kind); |
| 1989 | if (maybe_array->IsFailure()) return maybe_array; |
| 1990 | } |
| 1991 | |
| 1992 | return array; |
| 1993 | } else if (len == 0) { |
| 1994 | return array->Initialize(JSArray::kPreallocatedArrayElements); |
| 1995 | } |
| 1996 | } |
| 1997 | |
| 1998 | // Take the argument as the length. |
| 1999 | MaybeObject* maybe_obj = array->Initialize(0); |
| 2000 | if (!maybe_obj->To(&obj)) return maybe_obj; |
| 2001 | |
| 2002 | return array->SetElementsLength((*args)[0]); |
| 2003 | } |
| 2004 | |
| 2005 | // Optimize the case where there are no parameters passed. |
| 2006 | if (args->length() == 0) { |
| 2007 | return array->Initialize(JSArray::kPreallocatedArrayElements); |
| 2008 | } |
| 2009 | |
| 2010 | // Set length and elements on the array. |
| 2011 | int number_of_elements = args->length(); |
| 2012 | MaybeObject* maybe_object = |
| 2013 | array->EnsureCanContainElements(args, 0, number_of_elements, |
| 2014 | ALLOW_CONVERTED_DOUBLE_ELEMENTS); |
| 2015 | if (maybe_object->IsFailure()) return maybe_object; |
| 2016 | |
| 2017 | // Allocate an appropriately typed elements array. |
| 2018 | MaybeObject* maybe_elms; |
| 2019 | ElementsKind elements_kind = array->GetElementsKind(); |
| 2020 | if (IsFastDoubleElementsKind(elements_kind)) { |
| 2021 | maybe_elms = heap->AllocateUninitializedFixedDoubleArray( |
| 2022 | number_of_elements); |
| 2023 | } else { |
| 2024 | maybe_elms = heap->AllocateFixedArrayWithHoles(number_of_elements); |
| 2025 | } |
| 2026 | FixedArrayBase* elms; |
| 2027 | if (!maybe_elms->To(&elms)) return maybe_elms; |
| 2028 | |
| 2029 | // Fill in the content |
| 2030 | switch (array->GetElementsKind()) { |
| 2031 | case FAST_HOLEY_SMI_ELEMENTS: |
| 2032 | case FAST_SMI_ELEMENTS: { |
| 2033 | FixedArray* smi_elms = FixedArray::cast(elms); |
| 2034 | for (int index = 0; index < number_of_elements; index++) { |
| 2035 | smi_elms->set(index, (*args)[index], SKIP_WRITE_BARRIER); |
| 2036 | } |
| 2037 | break; |
| 2038 | } |
| 2039 | case FAST_HOLEY_ELEMENTS: |
| 2040 | case FAST_ELEMENTS: { |
rossberg@chromium.org | 79e7902 | 2013-06-03 15:43:46 +0000 | [diff] [blame] | 2041 | DisallowHeapAllocation no_gc; |
yangguo@chromium.org | 4a9f655 | 2013-03-04 14:46:33 +0000 | [diff] [blame] | 2042 | WriteBarrierMode mode = elms->GetWriteBarrierMode(no_gc); |
| 2043 | FixedArray* object_elms = FixedArray::cast(elms); |
| 2044 | for (int index = 0; index < number_of_elements; index++) { |
| 2045 | object_elms->set(index, (*args)[index], mode); |
| 2046 | } |
| 2047 | break; |
| 2048 | } |
| 2049 | case FAST_HOLEY_DOUBLE_ELEMENTS: |
| 2050 | case FAST_DOUBLE_ELEMENTS: { |
| 2051 | FixedDoubleArray* double_elms = FixedDoubleArray::cast(elms); |
| 2052 | for (int index = 0; index < number_of_elements; index++) { |
| 2053 | double_elms->set(index, (*args)[index]->Number()); |
| 2054 | } |
| 2055 | break; |
| 2056 | } |
| 2057 | default: |
| 2058 | UNREACHABLE(); |
| 2059 | break; |
| 2060 | } |
| 2061 | |
| 2062 | array->set_elements(elms); |
| 2063 | array->set_length(Smi::FromInt(number_of_elements)); |
| 2064 | return array; |
| 2065 | } |
| 2066 | |
kmillikin@chromium.org | 7c2628c | 2011-08-10 11:27:35 +0000 | [diff] [blame] | 2067 | } } // namespace v8::internal |