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comparison src/share/vm/gc_implementation/parallelScavenge/psMarkSweep.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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1 /*
2 * Copyright 2001-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 class PSAdaptiveSizePolicy;
26 class PSYoungGen;
27 class PSOldGen;
28
29 class PSMarkSweep : public MarkSweep {
30 private:
31 static elapsedTimer _accumulated_time;
32 static unsigned int _total_invocations;
33 static jlong _time_of_last_gc; // ms
34 static CollectorCounters* _counters;
35
36 // Closure accessors
37 static OopClosure* mark_and_push_closure() { return &MarkSweep::mark_and_push_closure; }
38 static VoidClosure* follow_stack_closure() { return (VoidClosure*)&MarkSweep::follow_stack_closure; }
39 static OopClosure* adjust_pointer_closure() { return (OopClosure*)&MarkSweep::adjust_pointer_closure; }
40 static OopClosure* adjust_root_pointer_closure() { return (OopClosure*)&MarkSweep::adjust_root_pointer_closure; }
41 static BoolObjectClosure* is_alive_closure() { return (BoolObjectClosure*)&MarkSweep::is_alive; }
42
43 debug_only(public:) // Used for PSParallelCompact debugging
44 // Mark live objects
45 static void mark_sweep_phase1(bool clear_all_softrefs);
46 // Calculate new addresses
47 static void mark_sweep_phase2();
48 debug_only(private:) // End used for PSParallelCompact debugging
49 // Update pointers
50 static void mark_sweep_phase3();
51 // Move objects to new positions
52 static void mark_sweep_phase4();
53
54 debug_only(public:) // Used for PSParallelCompact debugging
55 // Temporary data structures for traversal and storing/restoring marks
56 static void allocate_stacks();
57 static void deallocate_stacks();
58 static void set_ref_processor(ReferenceProcessor* rp) { // delete this method
59 _ref_processor = rp;
60 }
61 debug_only(private:) // End used for PSParallelCompact debugging
62
63 // If objects are left in eden after a collection, try to move the boundary
64 // and absorb them into the old gen. Returns true if eden was emptied.
65 static bool absorb_live_data_from_eden(PSAdaptiveSizePolicy* size_policy,
66 PSYoungGen* young_gen,
67 PSOldGen* old_gen);
68
69 // Reset time since last full gc
70 static void reset_millis_since_last_gc();
71
72 public:
73 static void invoke(bool clear_all_softrefs);
74 static void invoke_no_policy(bool clear_all_softrefs);
75
76 static void initialize();
77
78 // Public accessors
79 static elapsedTimer* accumulated_time() { return &_accumulated_time; }
80 static unsigned int total_invocations() { return _total_invocations; }
81 static CollectorCounters* counters() { return _counters; }
82
83 // Time since last full gc (in milliseconds)
84 static jlong millis_since_last_gc();
85 };