Mercurial > hg > truffle
diff src/share/vm/gc_implementation/g1/satbQueue.cpp @ 342:37f87013dfd8
6711316: Open source the Garbage-First garbage collector
Summary: First mercurial integration of the code for the Garbage-First garbage collector.
Reviewed-by: apetrusenko, iveresov, jmasa, sgoldman, tonyp, ysr
author | ysr |
---|---|
date | Thu, 05 Jun 2008 15:57:56 -0700 |
parents | |
children | df6caf649ff7 |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/gc_implementation/g1/satbQueue.cpp Thu Jun 05 15:57:56 2008 -0700 @@ -0,0 +1,160 @@ +/* + * Copyright 2001-2007 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +# include "incls/_precompiled.incl" +# include "incls/_satbQueue.cpp.incl" + +void ObjPtrQueue::apply_closure(ObjectClosure* cl) { + if (_buf != NULL) { + apply_closure_to_buffer(cl, _buf, _index, _sz); + _index = _sz; + } +} + +void ObjPtrQueue::apply_closure_to_buffer(ObjectClosure* cl, + void** buf, size_t index, size_t sz) { + if (cl == NULL) return; + for (size_t i = index; i < sz; i += oopSize) { + oop obj = (oop)buf[byte_index_to_index((int)i)]; + // There can be NULL entries because of destructors. + if (obj != NULL) { + cl->do_object(obj); + } + } +} +#ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away +#pragma warning( disable:4355 ) // 'this' : used in base member initializer list +#endif // _MSC_VER + + +SATBMarkQueueSet::SATBMarkQueueSet() : + PtrQueueSet(), + _closure(NULL), _par_closures(NULL), + _shared_satb_queue(this, true /*perm*/) +{} + +void SATBMarkQueueSet::initialize(Monitor* cbl_mon, Mutex* fl_lock, + int max_completed_queue, + Mutex* lock) { + PtrQueueSet::initialize(cbl_mon, fl_lock, max_completed_queue); + _shared_satb_queue.set_lock(lock); + if (ParallelGCThreads > 0) { + _par_closures = NEW_C_HEAP_ARRAY(ObjectClosure*, ParallelGCThreads); + } +} + + +void SATBMarkQueueSet::handle_zero_index_for_thread(JavaThread* t) { + t->satb_mark_queue().handle_zero_index(); +} + +void SATBMarkQueueSet::set_active_all_threads(bool b) { + _all_active = b; + for(JavaThread* t = Threads::first(); t; t = t->next()) { + t->satb_mark_queue().set_active(b); + } +} + +void SATBMarkQueueSet::set_closure(ObjectClosure* closure) { + _closure = closure; +} + +void SATBMarkQueueSet::set_par_closure(int i, ObjectClosure* par_closure) { + assert(ParallelGCThreads > 0 && _par_closures != NULL, "Precondition"); + _par_closures[i] = par_closure; +} + +void SATBMarkQueueSet::iterate_closure_all_threads() { + for(JavaThread* t = Threads::first(); t; t = t->next()) { + t->satb_mark_queue().apply_closure(_closure); + } + shared_satb_queue()->apply_closure(_closure); +} + +void SATBMarkQueueSet::par_iterate_closure_all_threads(int worker) { + SharedHeap* sh = SharedHeap::heap(); + int parity = sh->strong_roots_parity(); + + for(JavaThread* t = Threads::first(); t; t = t->next()) { + if (t->claim_oops_do(true, parity)) { + t->satb_mark_queue().apply_closure(_par_closures[worker]); + } + } + // We'll have worker 0 do this one. + if (worker == 0) { + shared_satb_queue()->apply_closure(_par_closures[0]); + } +} + +bool SATBMarkQueueSet::apply_closure_to_completed_buffer_work(bool par, + int worker) { + CompletedBufferNode* nd = NULL; + { + MutexLockerEx x(_cbl_mon, Mutex::_no_safepoint_check_flag); + if (_completed_buffers_head != NULL) { + nd = _completed_buffers_head; + _completed_buffers_head = nd->next; + if (_completed_buffers_head == NULL) _completed_buffers_tail = NULL; + _n_completed_buffers--; + if (_n_completed_buffers == 0) _process_completed = false; + } + } + ObjectClosure* cl = (par ? _par_closures[worker] : _closure); + if (nd != NULL) { + ObjPtrQueue::apply_closure_to_buffer(cl, nd->buf, 0, _sz); + deallocate_buffer(nd->buf); + delete nd; + return true; + } else { + return false; + } +} + +void SATBMarkQueueSet::abandon_partial_marking() { + CompletedBufferNode* buffers_to_delete = NULL; + { + MutexLockerEx x(_cbl_mon, Mutex::_no_safepoint_check_flag); + while (_completed_buffers_head != NULL) { + CompletedBufferNode* nd = _completed_buffers_head; + _completed_buffers_head = nd->next; + nd->next = buffers_to_delete; + buffers_to_delete = nd; + } + _completed_buffers_tail = NULL; + _n_completed_buffers = 0; + debug_only(assert_completed_buffer_list_len_correct_locked()); + } + while (buffers_to_delete != NULL) { + CompletedBufferNode* nd = buffers_to_delete; + buffers_to_delete = nd->next; + deallocate_buffer(nd->buf); + delete nd; + } + assert(SafepointSynchronize::is_at_safepoint(), "Must be at safepoint."); + // So we can safely manipulate these queues. + for (JavaThread* t = Threads::first(); t; t = t->next()) { + t->satb_mark_queue().reset(); + } + shared_satb_queue()->reset(); +}