1 /* 2 * Copyright (c) 2001, 2010, 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 #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSMARKSWEEP_HPP 26 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSMARKSWEEP_HPP 27 28 #include "gc_implementation/shared/collectorCounters.hpp" 29 #include "gc_implementation/shared/markSweep.inline.hpp" 30 #include "utilities/stack.hpp" 31 32 class PSAdaptiveSizePolicy; 33 class PSYoungGen; 34 class PSOldGen; 35 36 class PSMarkSweep : public MarkSweep { 37 private: 38 static elapsedTimer _accumulated_time; 39 static unsigned int _total_invocations; 40 static jlong _time_of_last_gc; // ms 41 static CollectorCounters* _counters; 42 43 // Closure accessors 44 static OopClosure* mark_and_push_closure() { return &MarkSweep::mark_and_push_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 OopClosure* adjust_root_pointer_closure() { return (OopClosure*)&MarkSweep::adjust_root_pointer_closure; } 48 static BoolObjectClosure* is_alive_closure() { return (BoolObjectClosure*)&MarkSweep::is_alive; } 49 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(); 60 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 69 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); 75 76 // Reset time since last full gc 77 static void reset_millis_since_last_gc(); 78 79 public: 80 static void invoke(bool clear_all_softrefs); 81 static void invoke_no_policy(bool clear_all_softrefs); 82 83 static void initialize(); 84 85 // Public accessors 86 static elapsedTimer* accumulated_time() { return &_accumulated_time; } 87 static unsigned int total_invocations() { return _total_invocations; } 88 static CollectorCounters* counters() { return _counters; } 89 90 // Time since last full gc (in milliseconds) 91 static jlong millis_since_last_gc(); 92 }; 93 94 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSMARKSWEEP_HPP