mstarzinger@chromium.org | e3b8d0f | 2013-02-01 09:06:41 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #include "sweeper-thread.h" |
| 29 | |
| 30 | #include "v8.h" |
| 31 | |
| 32 | #include "isolate.h" |
| 33 | #include "v8threads.h" |
| 34 | |
| 35 | namespace v8 { |
| 36 | namespace internal { |
| 37 | |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 38 | static const int kSweeperThreadStackSize = 64 * KB; |
| 39 | |
mstarzinger@chromium.org | e3b8d0f | 2013-02-01 09:06:41 +0000 | [diff] [blame] | 40 | SweeperThread::SweeperThread(Isolate* isolate) |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 41 | : Thread(Thread::Options("v8:SweeperThread", kSweeperThreadStackSize)), |
mstarzinger@chromium.org | e3b8d0f | 2013-02-01 09:06:41 +0000 | [diff] [blame] | 42 | isolate_(isolate), |
| 43 | heap_(isolate->heap()), |
| 44 | collector_(heap_->mark_compact_collector()), |
| 45 | start_sweeping_semaphore_(OS::CreateSemaphore(0)), |
| 46 | end_sweeping_semaphore_(OS::CreateSemaphore(0)), |
| 47 | stop_semaphore_(OS::CreateSemaphore(0)), |
| 48 | free_list_old_data_space_(heap_->paged_space(OLD_DATA_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)), |
| 51 | private_free_list_old_pointer_space_( |
| 52 | heap_->paged_space(OLD_POINTER_SPACE)) { |
| 53 | NoBarrier_Store(&stop_thread_, static_cast<AtomicWord>(false)); |
| 54 | } |
| 55 | |
| 56 | |
mstarzinger@chromium.org | e3b8d0f | 2013-02-01 09:06:41 +0000 | [diff] [blame] | 57 | void SweeperThread::Run() { |
| 58 | Isolate::SetIsolateThreadLocals(isolate_, NULL); |
| 59 | while (true) { |
| 60 | start_sweeping_semaphore_->Wait(); |
| 61 | |
| 62 | if (Acquire_Load(&stop_thread_)) { |
| 63 | stop_semaphore_->Signal(); |
| 64 | return; |
| 65 | } |
| 66 | |
| 67 | collector_->SweepInParallel(heap_->old_data_space(), |
| 68 | &private_free_list_old_data_space_, |
| 69 | &free_list_old_data_space_); |
| 70 | collector_->SweepInParallel(heap_->old_pointer_space(), |
| 71 | &private_free_list_old_pointer_space_, |
| 72 | &free_list_old_pointer_space_); |
| 73 | end_sweeping_semaphore_->Signal(); |
| 74 | } |
| 75 | } |
| 76 | |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 77 | |
mstarzinger@chromium.org | e3b8d0f | 2013-02-01 09:06:41 +0000 | [diff] [blame] | 78 | intptr_t SweeperThread::StealMemory(PagedSpace* space) { |
mstarzinger@chromium.org | e3b8d0f | 2013-02-01 09:06:41 +0000 | [diff] [blame] | 79 | if (space->identity() == OLD_POINTER_SPACE) { |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 80 | return space->free_list()->Concatenate(&free_list_old_pointer_space_); |
mstarzinger@chromium.org | e3b8d0f | 2013-02-01 09:06:41 +0000 | [diff] [blame] | 81 | } else if (space->identity() == OLD_DATA_SPACE) { |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 82 | return space->free_list()->Concatenate(&free_list_old_data_space_); |
mstarzinger@chromium.org | e3b8d0f | 2013-02-01 09:06:41 +0000 | [diff] [blame] | 83 | } |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 84 | return 0; |
mstarzinger@chromium.org | e3b8d0f | 2013-02-01 09:06:41 +0000 | [diff] [blame] | 85 | } |
| 86 | |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 87 | |
mstarzinger@chromium.org | e3b8d0f | 2013-02-01 09:06:41 +0000 | [diff] [blame] | 88 | void SweeperThread::Stop() { |
| 89 | Release_Store(&stop_thread_, static_cast<AtomicWord>(true)); |
| 90 | start_sweeping_semaphore_->Signal(); |
| 91 | stop_semaphore_->Wait(); |
| 92 | } |
| 93 | |
| 94 | |
| 95 | void SweeperThread::StartSweeping() { |
| 96 | start_sweeping_semaphore_->Signal(); |
| 97 | } |
| 98 | |
| 99 | |
| 100 | void SweeperThread::WaitForSweeperThread() { |
| 101 | end_sweeping_semaphore_->Wait(); |
| 102 | } |
| 103 | } } // namespace v8::internal |