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1 // Copyright 2015 the V8 project authors. All rights reserved. | 1 // Copyright 2015 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef HEAP_UTILS_H_ | 5 #ifndef HEAP_UTILS_H_ |
6 #define HEAP_UTILS_H_ | 6 #define HEAP_UTILS_H_ |
7 | 7 |
8 #include "src/factory.h" | 8 #include "src/factory.h" |
9 #include "src/heap/heap-inl.h" | 9 #include "src/heap/heap-inl.h" |
10 #include "src/heap/incremental-marking.h" | 10 #include "src/heap/incremental-marking.h" |
11 #include "src/heap/mark-compact.h" | 11 #include "src/heap/mark-compact.h" |
12 #include "src/isolate.h" | 12 #include "src/isolate.h" |
13 | 13 |
14 | 14 |
15 namespace v8 { | 15 namespace v8 { |
16 namespace internal { | 16 namespace internal { |
17 | 17 |
18 static int LenFromSize(int size) { | 18 static int LenFromSize(int size) { |
19 return (size - FixedArray::kHeaderSize) / kPointerSize; | 19 return (size - i::FixedArray::kHeaderSize) / i::kPointerSize; |
20 } | 20 } |
21 | 21 |
22 | 22 |
23 static inline std::vector<Handle<FixedArray>> CreatePadding( | 23 static inline void CreatePadding(i::Heap* heap, int padding_size, |
24 Heap* heap, int padding_size, PretenureFlag tenure, | 24 i::PretenureFlag tenure) { |
25 int object_size = Page::kMaxRegularHeapObjectSize) { | 25 const int max_number_of_objects = 20; |
26 std::vector<Handle<FixedArray>> handles; | 26 v8::internal::Handle<v8::internal::FixedArray> |
27 Isolate* isolate = heap->isolate(); | 27 big_objects[max_number_of_objects]; |
| 28 i::Isolate* isolate = heap->isolate(); |
28 int allocate_memory; | 29 int allocate_memory; |
29 int length; | 30 int length; |
30 int free_memory = padding_size; | 31 int free_memory = padding_size; |
31 if (tenure == i::TENURED) { | 32 if (tenure == i::TENURED) { |
32 int current_free_memory = | 33 int current_free_memory = |
33 static_cast<int>(*heap->old_space()->allocation_limit_address() - | 34 static_cast<int>(*heap->old_space()->allocation_limit_address() - |
34 *heap->old_space()->allocation_top_address()); | 35 *heap->old_space()->allocation_top_address()); |
35 CHECK(padding_size <= current_free_memory || current_free_memory == 0); | 36 CHECK(padding_size <= current_free_memory || current_free_memory == 0); |
36 } else { | 37 } else { |
37 heap->new_space()->DisableInlineAllocationSteps(); | 38 heap->new_space()->DisableInlineAllocationSteps(); |
38 int current_free_memory = | 39 int current_free_memory = |
39 static_cast<int>(*heap->new_space()->allocation_limit_address() - | 40 static_cast<int>(*heap->new_space()->allocation_limit_address() - |
40 *heap->new_space()->allocation_top_address()); | 41 *heap->new_space()->allocation_top_address()); |
41 CHECK(padding_size <= current_free_memory || current_free_memory == 0); | 42 CHECK(padding_size <= current_free_memory || current_free_memory == 0); |
42 } | 43 } |
43 while (free_memory > 0) { | 44 for (int i = 0; i < max_number_of_objects && free_memory > 0; i++) { |
44 // for (int i = 0; i < max_number_of_objects && free_memory > 0; i++) { | 45 if (free_memory > i::Page::kMaxRegularHeapObjectSize) { |
45 if (free_memory > object_size) { | 46 allocate_memory = i::Page::kMaxRegularHeapObjectSize; |
46 allocate_memory = object_size; | |
47 length = LenFromSize(allocate_memory); | 47 length = LenFromSize(allocate_memory); |
48 } else { | 48 } else { |
49 allocate_memory = free_memory; | 49 allocate_memory = free_memory; |
50 length = LenFromSize(allocate_memory); | 50 length = LenFromSize(allocate_memory); |
51 if (length <= 0) { | 51 if (length <= 0) { |
52 // Not enough room to create another fixed array. Let's create a filler. | 52 // Not enough room to create another fixed array. Let's create a filler. |
53 heap->CreateFillerObjectAt(*heap->old_space()->allocation_top_address(), | 53 heap->CreateFillerObjectAt(*heap->old_space()->allocation_top_address(), |
54 free_memory); | 54 free_memory); |
55 break; | 55 break; |
56 } | 56 } |
57 } | 57 } |
58 handles.push_back(isolate->factory()->NewFixedArray(length, tenure)); | 58 big_objects[i] = isolate->factory()->NewFixedArray(length, tenure); |
59 CHECK((tenure == NOT_TENURED && heap->InNewSpace(*handles.back())) || | 59 CHECK((tenure == i::NOT_TENURED && heap->InNewSpace(*big_objects[i])) || |
60 (tenure == TENURED && heap->InOldSpace(*handles.back()))); | 60 (tenure == i::TENURED && heap->InOldSpace(*big_objects[i]))); |
61 free_memory -= allocate_memory; | 61 free_memory -= allocate_memory; |
62 } | 62 } |
63 return handles; | |
64 } | 63 } |
65 | 64 |
66 | 65 |
67 // Helper function that simulates a full new-space in the heap. | 66 // Helper function that simulates a full new-space in the heap. |
68 static inline bool FillUpOnePage(v8::internal::NewSpace* space) { | 67 static inline bool FillUpOnePage(v8::internal::NewSpace* space) { |
69 space->DisableInlineAllocationSteps(); | 68 space->DisableInlineAllocationSteps(); |
70 int space_remaining = static_cast<int>(*space->allocation_limit_address() - | 69 int space_remaining = static_cast<int>(*space->allocation_limit_address() - |
71 *space->allocation_top_address()); | 70 *space->allocation_top_address()); |
72 if (space_remaining == 0) return false; | 71 if (space_remaining == 0) return false; |
73 CreatePadding(space->heap(), space_remaining, i::NOT_TENURED); | 72 CreatePadding(space->heap(), space_remaining, i::NOT_TENURED); |
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130 marking->FinalizeIncrementally(); | 129 marking->FinalizeIncrementally(); |
131 } | 130 } |
132 } | 131 } |
133 CHECK(marking->IsComplete()); | 132 CHECK(marking->IsComplete()); |
134 } | 133 } |
135 | 134 |
136 } // namespace internal | 135 } // namespace internal |
137 } // namespace v8 | 136 } // namespace v8 |
138 | 137 |
139 #endif // HEAP_UTILS_H_ | 138 #endif // HEAP_UTILS_H_ |
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