Tue, 08 Aug 2017 15:57:29 +0800
merge
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 */
25 #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSMARKSWEEP_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSMARKSWEEP_HPP
28 #include "gc_implementation/shared/collectorCounters.hpp"
29 #include "gc_implementation/shared/markSweep.inline.hpp"
30 #include "utilities/stack.hpp"
32 class PSAdaptiveSizePolicy;
33 class PSYoungGen;
34 class PSOldGen;
36 class PSMarkSweep : public MarkSweep {
37 private:
38 static elapsedTimer _accumulated_time;
39 static jlong _time_of_last_gc; // ms
40 static CollectorCounters* _counters;
42 // Closure accessors
43 static OopClosure* mark_and_push_closure() { return &MarkSweep::mark_and_push_closure; }
44 static KlassClosure* follow_klass_closure() { return &MarkSweep::follow_klass_closure; }
45 static VoidClosure* follow_stack_closure() { return (VoidClosure*)&MarkSweep::follow_stack_closure; }
46 static OopClosure* adjust_pointer_closure() { return (OopClosure*)&MarkSweep::adjust_pointer_closure; }
47 static KlassClosure* adjust_klass_closure() { return &MarkSweep::adjust_klass_closure; }
48 static BoolObjectClosure* is_alive_closure() { return (BoolObjectClosure*)&MarkSweep::is_alive; }
50 debug_only(public:) // Used for PSParallelCompact debugging
51 // Mark live objects
52 static void mark_sweep_phase1(bool clear_all_softrefs);
53 // Calculate new addresses
54 static void mark_sweep_phase2();
55 debug_only(private:) // End used for PSParallelCompact debugging
56 // Update pointers
57 static void mark_sweep_phase3();
58 // Move objects to new positions
59 static void mark_sweep_phase4();
61 debug_only(public:) // Used for PSParallelCompact debugging
62 // Temporary data structures for traversal and storing/restoring marks
63 static void allocate_stacks();
64 static void deallocate_stacks();
65 static void set_ref_processor(ReferenceProcessor* rp) { // delete this method
66 _ref_processor = rp;
67 }
68 debug_only(private:) // End used for PSParallelCompact debugging
70 // If objects are left in eden after a collection, try to move the boundary
71 // and absorb them into the old gen. Returns true if eden was emptied.
72 static bool absorb_live_data_from_eden(PSAdaptiveSizePolicy* size_policy,
73 PSYoungGen* young_gen,
74 PSOldGen* old_gen);
76 // Reset time since last full gc
77 static void reset_millis_since_last_gc();
79 public:
80 static void invoke(bool clear_all_softrefs);
81 static bool invoke_no_policy(bool clear_all_softrefs);
83 static void initialize();
85 // Public accessors
86 static elapsedTimer* accumulated_time() { return &_accumulated_time; }
87 static CollectorCounters* counters() { return _counters; }
89 // Time since last full gc (in milliseconds)
90 static jlong millis_since_last_gc();
91 };
93 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSMARKSWEEP_HPP