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1 /*
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2 * Copyright 2001-2005 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 class PSAdaptiveSizePolicy;
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26 class PSYoungGen;
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27 class PSOldGen;
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28
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29 class PSMarkSweep : public MarkSweep {
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30 private:
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31 static elapsedTimer _accumulated_time;
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32 static unsigned int _total_invocations;
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33 static jlong _time_of_last_gc; // ms
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34 static CollectorCounters* _counters;
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35
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36 // Closure accessors
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37 static OopClosure* mark_and_push_closure() { return &MarkSweep::mark_and_push_closure; }
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38 static VoidClosure* follow_stack_closure() { return (VoidClosure*)&MarkSweep::follow_stack_closure; }
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39 static OopClosure* adjust_pointer_closure() { return (OopClosure*)&MarkSweep::adjust_pointer_closure; }
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40 static OopClosure* adjust_root_pointer_closure() { return (OopClosure*)&MarkSweep::adjust_root_pointer_closure; }
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41 static BoolObjectClosure* is_alive_closure() { return (BoolObjectClosure*)&MarkSweep::is_alive; }
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42
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43 debug_only(public:) // Used for PSParallelCompact debugging
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44 // Mark live objects
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45 static void mark_sweep_phase1(bool clear_all_softrefs);
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46 // Calculate new addresses
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47 static void mark_sweep_phase2();
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48 debug_only(private:) // End used for PSParallelCompact debugging
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49 // Update pointers
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50 static void mark_sweep_phase3();
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51 // Move objects to new positions
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52 static void mark_sweep_phase4();
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53
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54 debug_only(public:) // Used for PSParallelCompact debugging
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55 // Temporary data structures for traversal and storing/restoring marks
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56 static void allocate_stacks();
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57 static void deallocate_stacks();
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58 static void set_ref_processor(ReferenceProcessor* rp) { // delete this method
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59 _ref_processor = rp;
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60 }
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61 debug_only(private:) // End used for PSParallelCompact debugging
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62
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63 // If objects are left in eden after a collection, try to move the boundary
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64 // and absorb them into the old gen. Returns true if eden was emptied.
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65 static bool absorb_live_data_from_eden(PSAdaptiveSizePolicy* size_policy,
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66 PSYoungGen* young_gen,
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67 PSOldGen* old_gen);
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68
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69 // Reset time since last full gc
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70 static void reset_millis_since_last_gc();
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71
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72 public:
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73 static void invoke(bool clear_all_softrefs);
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74 static void invoke_no_policy(bool clear_all_softrefs);
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75
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76 static void initialize();
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77
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78 // Public accessors
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79 static elapsedTimer* accumulated_time() { return &_accumulated_time; }
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80 static unsigned int total_invocations() { return _total_invocations; }
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81 static CollectorCounters* counters() { return _counters; }
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82
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83 // Time since last full gc (in milliseconds)
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84 static jlong millis_since_last_gc();
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85 };
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