1 /* 2 * Copyright (c) 2001, 2005, 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 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 };