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 class G1ArchiveRegionMap;
57
58 private:
59 // Mark live objects
60 static void mark_sweep_phase1(bool& marked_for_deopt,
61 bool clear_all_softrefs);
62 // Calculate new addresses
63 static void mark_sweep_phase2();
64 // Update pointers
65 static void mark_sweep_phase3();
66 // Move objects to new positions
67 static void mark_sweep_phase4();
68
69 static void allocate_stacks();
70 static void prepare_compaction();
71 static void prepare_compaction_work(G1PrepareCompactClosure* blk);
72 };
73
74 class G1PrepareCompactClosure : public HeapRegionClosure {
75 protected:
76 G1CollectedHeap* _g1h;
77 ModRefBarrierSet* _mrbs;
78 CompactPoint _cp;
79 uint _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(0) { }
91
92 void update_sets();
93 bool doHeapRegion(HeapRegion* hr);
94 };
95
96 #endif // SHARE_VM_GC_G1_G1MARKSWEEP_HPP
|
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/g1CardTable.hpp"
29 #include "gc/g1/g1CollectedHeap.hpp"
30 #include "gc/g1/heapRegion.hpp"
31 #include "gc/serial/genMarkSweep.hpp"
32 #include "gc/shared/generation.hpp"
33 #include "memory/universe.hpp"
34 #include "oops/markOop.hpp"
35 #include "oops/oop.hpp"
36 #include "runtime/timer.hpp"
37 #include "utilities/growableArray.hpp"
38
39 class ReferenceProcessor;
40
41 // G1MarkSweep takes care of global mark-compact garbage collection for a
42 // G1CollectedHeap using a four-phase pointer forwarding algorithm. All
43 // generations are assumed to support marking; those that can also support
44 // compaction.
45 //
46 // Class unloading will only occur when a full gc is invoked.
47 class G1PrepareCompactClosure;
48 class G1ArchiveRegionMap;
58
59 private:
60 // Mark live objects
61 static void mark_sweep_phase1(bool& marked_for_deopt,
62 bool clear_all_softrefs);
63 // Calculate new addresses
64 static void mark_sweep_phase2();
65 // Update pointers
66 static void mark_sweep_phase3();
67 // Move objects to new positions
68 static void mark_sweep_phase4();
69
70 static void allocate_stacks();
71 static void prepare_compaction();
72 static void prepare_compaction_work(G1PrepareCompactClosure* blk);
73 };
74
75 class G1PrepareCompactClosure : public HeapRegionClosure {
76 protected:
77 G1CollectedHeap* _g1h;
78 G1CardTable *_ct;
79 CompactPoint _cp;
80 uint _humongous_regions_removed;
81
82 virtual void prepare_for_compaction(HeapRegion* hr, HeapWord* end);
83 void prepare_for_compaction_work(CompactPoint* cp, HeapRegion* hr, HeapWord* end);
84 void free_humongous_region(HeapRegion* hr);
85 bool is_cp_initialized() const { return _cp.space != NULL; }
86
87 public:
88 G1PrepareCompactClosure() :
89 _g1h(G1CollectedHeap::heap()),
90 _ct(_g1h->g1_card_table()),
91 _humongous_regions_removed(0) { }
92
93 void update_sets();
94 bool doHeapRegion(HeapRegion* hr);
95 };
96
97 #endif // SHARE_VM_GC_G1_G1MARKSWEEP_HPP
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