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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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35 namespace v8 { | 35 namespace v8 { |
36 namespace internal { | 36 namespace internal { |
37 | 37 |
38 static const int kSweeperThreadStackSize = 64 * KB; | 38 static const int kSweeperThreadStackSize = 64 * KB; |
39 | 39 |
40 SweeperThread::SweeperThread(Isolate* isolate) | 40 SweeperThread::SweeperThread(Isolate* isolate) |
41 : Thread(Thread::Options("v8:SweeperThread", kSweeperThreadStackSize)), | 41 : Thread(Thread::Options("v8:SweeperThread", kSweeperThreadStackSize)), |
42 isolate_(isolate), | 42 isolate_(isolate), |
43 heap_(isolate->heap()), | 43 heap_(isolate->heap()), |
44 collector_(heap_->mark_compact_collector()), | 44 collector_(heap_->mark_compact_collector()), |
45 start_sweeping_semaphore_(OS::CreateSemaphore(0)), | 45 start_sweeping_semaphore_(0), |
46 end_sweeping_semaphore_(OS::CreateSemaphore(0)), | 46 end_sweeping_semaphore_(0), |
47 stop_semaphore_(OS::CreateSemaphore(0)), | 47 stop_semaphore_(0), |
48 free_list_old_data_space_(heap_->paged_space(OLD_DATA_SPACE)), | 48 free_list_old_data_space_(heap_->paged_space(OLD_DATA_SPACE)), |
49 free_list_old_pointer_space_(heap_->paged_space(OLD_POINTER_SPACE)), | 49 free_list_old_pointer_space_(heap_->paged_space(OLD_POINTER_SPACE)), |
50 private_free_list_old_data_space_(heap_->paged_space(OLD_DATA_SPACE)), | 50 private_free_list_old_data_space_(heap_->paged_space(OLD_DATA_SPACE)), |
51 private_free_list_old_pointer_space_( | 51 private_free_list_old_pointer_space_( |
52 heap_->paged_space(OLD_POINTER_SPACE)) { | 52 heap_->paged_space(OLD_POINTER_SPACE)) { |
53 NoBarrier_Store(&stop_thread_, static_cast<AtomicWord>(false)); | 53 NoBarrier_Store(&stop_thread_, static_cast<AtomicWord>(false)); |
54 } | 54 } |
55 | 55 |
56 | 56 |
57 void SweeperThread::Run() { | 57 void SweeperThread::Run() { |
58 Isolate::SetIsolateThreadLocals(isolate_, NULL); | 58 Isolate::SetIsolateThreadLocals(isolate_, NULL); |
59 DisallowHeapAllocation no_allocation; | 59 DisallowHeapAllocation no_allocation; |
60 DisallowHandleAllocation no_handles; | 60 DisallowHandleAllocation no_handles; |
61 DisallowHandleDereference no_deref; | 61 DisallowHandleDereference no_deref; |
62 | 62 |
63 while (true) { | 63 while (true) { |
64 start_sweeping_semaphore_->Wait(); | 64 start_sweeping_semaphore_.Wait(); |
65 | 65 |
66 if (Acquire_Load(&stop_thread_)) { | 66 if (Acquire_Load(&stop_thread_)) { |
67 stop_semaphore_->Signal(); | 67 stop_semaphore_.Signal(); |
68 return; | 68 return; |
69 } | 69 } |
70 | 70 |
71 collector_->SweepInParallel(heap_->old_data_space(), | 71 collector_->SweepInParallel(heap_->old_data_space(), |
72 &private_free_list_old_data_space_, | 72 &private_free_list_old_data_space_, |
73 &free_list_old_data_space_); | 73 &free_list_old_data_space_); |
74 collector_->SweepInParallel(heap_->old_pointer_space(), | 74 collector_->SweepInParallel(heap_->old_pointer_space(), |
75 &private_free_list_old_pointer_space_, | 75 &private_free_list_old_pointer_space_, |
76 &free_list_old_pointer_space_); | 76 &free_list_old_pointer_space_); |
77 end_sweeping_semaphore_->Signal(); | 77 end_sweeping_semaphore_.Signal(); |
78 } | 78 } |
79 } | 79 } |
80 | 80 |
81 | 81 |
82 intptr_t SweeperThread::StealMemory(PagedSpace* space) { | 82 intptr_t SweeperThread::StealMemory(PagedSpace* space) { |
83 if (space->identity() == OLD_POINTER_SPACE) { | 83 if (space->identity() == OLD_POINTER_SPACE) { |
84 return space->free_list()->Concatenate(&free_list_old_pointer_space_); | 84 return space->free_list()->Concatenate(&free_list_old_pointer_space_); |
85 } else if (space->identity() == OLD_DATA_SPACE) { | 85 } else if (space->identity() == OLD_DATA_SPACE) { |
86 return space->free_list()->Concatenate(&free_list_old_data_space_); | 86 return space->free_list()->Concatenate(&free_list_old_data_space_); |
87 } | 87 } |
88 return 0; | 88 return 0; |
89 } | 89 } |
90 | 90 |
91 | 91 |
92 void SweeperThread::Stop() { | 92 void SweeperThread::Stop() { |
93 Release_Store(&stop_thread_, static_cast<AtomicWord>(true)); | 93 Release_Store(&stop_thread_, static_cast<AtomicWord>(true)); |
94 start_sweeping_semaphore_->Signal(); | 94 start_sweeping_semaphore_.Signal(); |
95 stop_semaphore_->Wait(); | 95 stop_semaphore_.Wait(); |
96 Join(); | 96 Join(); |
97 } | 97 } |
98 | 98 |
99 | 99 |
100 void SweeperThread::StartSweeping() { | 100 void SweeperThread::StartSweeping() { |
101 start_sweeping_semaphore_->Signal(); | 101 start_sweeping_semaphore_.Signal(); |
102 } | 102 } |
103 | 103 |
104 | 104 |
105 void SweeperThread::WaitForSweeperThread() { | 105 void SweeperThread::WaitForSweeperThread() { |
106 end_sweeping_semaphore_->Wait(); | 106 end_sweeping_semaphore_.Wait(); |
107 } | 107 } |
108 } } // namespace v8::internal | 108 } } // namespace v8::internal |
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