1 /*
2 * Copyright (c) 2001, 2013, 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_G1_G1MARKSWEEP_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1MARKSWEEP_HPP
27
28 #include "gc_implementation/g1/g1CollectedHeap.hpp"
29 #include "gc_implementation/g1/heapRegion.hpp"
30 #include "memory/genMarkSweep.hpp"
31 #include "memory/generation.hpp"
32 #include "memory/universe.hpp"
33 #include "oops/markOop.hpp"
34 #include "oops/oop.hpp"
35 #include "runtime/timer.hpp"
36 #include "utilities/growableArray.hpp"
37
38 class ReferenceProcessor;
39
40 // G1MarkSweep takes care of global mark-compact garbage collection for a
41 // G1CollectedHeap using a four-phase pointer forwarding algorithm. All
42 // generations are assumed to support marking; those that can also support
43 // compaction.
44 //
45 // Class unloading will only occur when a full gc is invoked.
46 class G1PrepareCompactClosure;
47
48 class G1MarkSweep : AllStatic {
49 public:
50
51 static void invoke_at_safepoint(ReferenceProcessor* rp,
76 G1CollectedHeap* _g1h;
77 ModRefBarrierSet* _mrbs;
78 CompactPoint _cp;
79 HeapRegionSetCount _humongous_regions_removed;
80
81 virtual void prepare_for_compaction(HeapRegion* hr, HeapWord* end);
82 void prepare_for_compaction_work(CompactPoint* cp, HeapRegion* hr, HeapWord* end);
83 void free_humongous_region(HeapRegion* hr);
84 bool is_cp_initialized() const { return _cp.space != NULL; }
85
86 public:
87 G1PrepareCompactClosure() :
88 _g1h(G1CollectedHeap::heap()),
89 _mrbs(_g1h->g1_barrier_set()),
90 _humongous_regions_removed() { }
91
92 void update_sets();
93 bool doHeapRegion(HeapRegion* hr);
94 };
95
96 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1MARKSWEEP_HPP
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1 /*
2 * Copyright (c) 2001, 2015, 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_G1_G1MARKSWEEP_HPP
26 #define SHARE_VM_GC_G1_G1MARKSWEEP_HPP
27
28 #include "gc/g1/g1CollectedHeap.hpp"
29 #include "gc/g1/heapRegion.hpp"
30 #include "gc/serial/genMarkSweep.hpp"
31 #include "gc/shared/generation.hpp"
32 #include "memory/universe.hpp"
33 #include "oops/markOop.hpp"
34 #include "oops/oop.hpp"
35 #include "runtime/timer.hpp"
36 #include "utilities/growableArray.hpp"
37
38 class ReferenceProcessor;
39
40 // G1MarkSweep takes care of global mark-compact garbage collection for a
41 // G1CollectedHeap using a four-phase pointer forwarding algorithm. All
42 // generations are assumed to support marking; those that can also support
43 // compaction.
44 //
45 // Class unloading will only occur when a full gc is invoked.
46 class G1PrepareCompactClosure;
47
48 class G1MarkSweep : AllStatic {
49 public:
50
51 static void invoke_at_safepoint(ReferenceProcessor* rp,
76 G1CollectedHeap* _g1h;
77 ModRefBarrierSet* _mrbs;
78 CompactPoint _cp;
79 HeapRegionSetCount _humongous_regions_removed;
80
81 virtual void prepare_for_compaction(HeapRegion* hr, HeapWord* end);
82 void prepare_for_compaction_work(CompactPoint* cp, HeapRegion* hr, HeapWord* end);
83 void free_humongous_region(HeapRegion* hr);
84 bool is_cp_initialized() const { return _cp.space != NULL; }
85
86 public:
87 G1PrepareCompactClosure() :
88 _g1h(G1CollectedHeap::heap()),
89 _mrbs(_g1h->g1_barrier_set()),
90 _humongous_regions_removed() { }
91
92 void update_sets();
93 bool doHeapRegion(HeapRegion* hr);
94 };
95
96 #endif // SHARE_VM_GC_G1_G1MARKSWEEP_HPP
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