1 /*
2 * Copyright (c) 2007, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 /////////////////////////////////////////////////////////////////
26 // Closures used by ConcurrentMarkSweepGeneration's collector
27 /////////////////////////////////////////////////////////////////
28 class ConcurrentMarkSweepGeneration;
29 class CMSBitMap;
30 class CMSMarkStack;
31 class CMSCollector;
32 class MarkFromRootsClosure;
33 class Par_MarkFromRootsClosure;
34
35 // Decode the oop and call do_oop on it.
36 #define DO_OOP_WORK_DEFN \
37 void do_oop(oop obj); \
38 template <class T> inline void do_oop_work(T* p) { \
39 T heap_oop = oopDesc::load_heap_oop(p); \
40 if (!oopDesc::is_null(heap_oop)) { \
41 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); \
42 do_oop(obj); \
43 } \
44 }
410 class CMSParKeepAliveClosure: public Par_KlassRememberingOopClosure {
411 private:
412 MemRegion _span;
413 OopTaskQueue* _work_queue;
414 CMSBitMap* _bit_map;
415 CMSInnerParMarkAndPushClosure
416 _mark_and_push;
417 const uint _low_water_mark;
418 void trim_queue(uint max);
419 protected:
420 DO_OOP_WORK_DEFN
421 public:
422 CMSParKeepAliveClosure(CMSCollector* collector, MemRegion span,
423 CMSBitMap* bit_map, CMSMarkStack* revisit_stack,
424 OopTaskQueue* work_queue);
425 virtual void do_oop(oop* p);
426 virtual void do_oop(narrowOop* p);
427 inline void do_oop_nv(oop* p) { CMSParKeepAliveClosure::do_oop_work(p); }
428 inline void do_oop_nv(narrowOop* p) { CMSParKeepAliveClosure::do_oop_work(p); }
429 };
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1 /*
2 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_GC_IMPLEMENTATION_CONCURRENTMARKSWEEP_CMSOOPCLOSURES_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_CONCURRENTMARKSWEEP_CMSOOPCLOSURES_HPP
27
28 #include "memory/genOopClosures.hpp"
29
30 /////////////////////////////////////////////////////////////////
31 // Closures used by ConcurrentMarkSweepGeneration's collector
32 /////////////////////////////////////////////////////////////////
33 class ConcurrentMarkSweepGeneration;
34 class CMSBitMap;
35 class CMSMarkStack;
36 class CMSCollector;
37 class MarkFromRootsClosure;
38 class Par_MarkFromRootsClosure;
39
40 // Decode the oop and call do_oop on it.
41 #define DO_OOP_WORK_DEFN \
42 void do_oop(oop obj); \
43 template <class T> inline void do_oop_work(T* p) { \
44 T heap_oop = oopDesc::load_heap_oop(p); \
45 if (!oopDesc::is_null(heap_oop)) { \
46 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); \
47 do_oop(obj); \
48 } \
49 }
415 class CMSParKeepAliveClosure: public Par_KlassRememberingOopClosure {
416 private:
417 MemRegion _span;
418 OopTaskQueue* _work_queue;
419 CMSBitMap* _bit_map;
420 CMSInnerParMarkAndPushClosure
421 _mark_and_push;
422 const uint _low_water_mark;
423 void trim_queue(uint max);
424 protected:
425 DO_OOP_WORK_DEFN
426 public:
427 CMSParKeepAliveClosure(CMSCollector* collector, MemRegion span,
428 CMSBitMap* bit_map, CMSMarkStack* revisit_stack,
429 OopTaskQueue* work_queue);
430 virtual void do_oop(oop* p);
431 virtual void do_oop(narrowOop* p);
432 inline void do_oop_nv(oop* p) { CMSParKeepAliveClosure::do_oop_work(p); }
433 inline void do_oop_nv(narrowOop* p) { CMSParKeepAliveClosure::do_oop_work(p); }
434 };
435
436 #endif // SHARE_VM_GC_IMPLEMENTATION_CONCURRENTMARKSWEEP_CMSOOPCLOSURES_HPP
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