Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
Brian Carlstrom | fc0e321 | 2013-07-17 14:40:12 -0700 | [diff] [blame] | 17 | #ifndef ART_RUNTIME_MIRROR_ARRAY_INL_H_ |
| 18 | #define ART_RUNTIME_MIRROR_ARRAY_INL_H_ |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 19 | |
| 20 | #include "array.h" |
| 21 | |
| 22 | #include "class.h" |
Hiroshi Yamauchi | 967a0ad | 2013-09-10 16:24:21 -0700 | [diff] [blame^] | 23 | #include "thread.h" |
| 24 | #include "utils.h" |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 25 | |
| 26 | namespace art { |
| 27 | namespace mirror { |
| 28 | |
| 29 | inline size_t Array::SizeOf() const { |
| 30 | // This is safe from overflow because the array was already allocated, so we know it's sane. |
| 31 | size_t component_size = GetClass()->GetComponentSize(); |
| 32 | int32_t component_count = GetLength(); |
| 33 | size_t header_size = sizeof(Object) + (component_size == sizeof(int64_t) ? 8 : 4); |
| 34 | size_t data_size = component_count * component_size; |
| 35 | return header_size + data_size; |
| 36 | } |
| 37 | |
Hiroshi Yamauchi | 967a0ad | 2013-09-10 16:24:21 -0700 | [diff] [blame^] | 38 | inline Array* Array::Alloc(Thread* self, Class* array_class, int32_t component_count, |
| 39 | size_t component_size) { |
| 40 | DCHECK(array_class != NULL); |
| 41 | DCHECK_GE(component_count, 0); |
| 42 | DCHECK(array_class->IsArrayClass()); |
| 43 | |
| 44 | size_t header_size = sizeof(Object) + (component_size == sizeof(int64_t) ? 8 : 4); |
| 45 | size_t data_size = component_count * component_size; |
| 46 | size_t size = header_size + data_size; |
| 47 | |
| 48 | // Check for overflow and throw OutOfMemoryError if this was an unreasonable request. |
| 49 | size_t component_shift = sizeof(size_t) * 8 - 1 - CLZ(component_size); |
| 50 | if (UNLIKELY(data_size >> component_shift != size_t(component_count) || size < data_size)) { |
| 51 | self->ThrowOutOfMemoryError(StringPrintf("%s of length %d would overflow", |
| 52 | PrettyDescriptor(array_class).c_str(), |
| 53 | component_count).c_str()); |
| 54 | return NULL; |
| 55 | } |
| 56 | |
| 57 | gc::Heap* heap = Runtime::Current()->GetHeap(); |
| 58 | Array* array = down_cast<Array*>(heap->AllocObject(self, array_class, size)); |
| 59 | if (LIKELY(array != NULL)) { |
| 60 | DCHECK(array->IsArrayInstance()); |
| 61 | array->SetLength(component_count); |
| 62 | } |
| 63 | return array; |
| 64 | } |
| 65 | |
| 66 | inline Array* Array::Alloc(Thread* self, Class* array_class, int32_t component_count) { |
| 67 | DCHECK(array_class->IsArrayClass()); |
| 68 | return Alloc(self, array_class, component_count, array_class->GetComponentSize()); |
| 69 | } |
| 70 | |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 71 | } // namespace mirror |
| 72 | } // namespace art |
| 73 | |
Brian Carlstrom | fc0e321 | 2013-07-17 14:40:12 -0700 | [diff] [blame] | 74 | #endif // ART_RUNTIME_MIRROR_ARRAY_INL_H_ |