1 /* 2 * Copyright (c) 2010, 2015 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_PSCOMPACTIONMANAGER_INLINE_HPP 26 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSCOMPACTIONMANAGER_INLINE_HPP 27 28 #include "gc_implementation/parallelScavenge/psCompactionManager.hpp" 29 #include "gc_implementation/parallelScavenge/psParallelCompact.inline.hpp" 30 #include "oops/objArrayOop.hpp" 31 #include "oops/oop.inline.hpp" 32 #include "utilities/debug.hpp" 33 #include "utilities/globalDefinitions.hpp" 34 #include "utilities/taskqueue.inline.hpp" 35 36 inline void ParCompactionManager::push(oop obj) { 37 _marking_stack.push(obj); 38 } 39 40 void ParCompactionManager::push_objarray(oop obj, size_t index) 41 { 42 ObjArrayTask task(obj, index); 43 assert(task.is_valid(), "bad ObjArrayTask"); 44 _objarray_stack.push(task); 45 } 46 47 void ParCompactionManager::push_region(size_t index) 48 { 49 #ifdef ASSERT 50 const ParallelCompactData& sd = PSParallelCompact::summary_data(); 51 ParallelCompactData::RegionData* const region_ptr = sd.region(index); 52 assert(region_ptr->claimed(), "must be claimed"); 53 assert(region_ptr->_pushed++ == 0, "should only be pushed once"); 54 #endif 55 region_stack()->push(index); 56 } 57 58 template <typename T> 59 inline void ParCompactionManager::mark_and_push(T* p) { 60 T heap_oop = oopDesc::load_heap_oop(p); 61 if (!oopDesc::is_null(heap_oop)) { 62 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); 63 assert(ParallelScavengeHeap::heap()->is_in(obj), "should be in heap"); 64 65 if (mark_bitmap()->is_unmarked(obj) && PSParallelCompact::mark_obj(obj)) { 66 push(obj); 67 } 68 } 69 } 70 71 template <typename T> 72 inline void ParCompactionManager::MarkAndPushClosure::do_oop_nv(T* p) { 73 _compaction_manager->mark_and_push(p); 74 } 75 76 inline void ParCompactionManager::MarkAndPushClosure::do_oop(oop* p) { do_oop_nv(p); } 77 inline void ParCompactionManager::MarkAndPushClosure::do_oop(narrowOop* p) { do_oop_nv(p); } 78 79 inline void ParCompactionManager::follow_klass(Klass* klass) { 80 oop holder = klass->klass_holder(); 81 mark_and_push(&holder); 82 } 83 84 inline void ParCompactionManager::FollowStackClosure::do_void() { 85 _compaction_manager->follow_marking_stacks(); 86 } 87 88 inline void ParCompactionManager::FollowKlassClosure::do_klass(Klass* klass) { 89 klass->oops_do(_mark_and_push_closure); 90 } 91 92 inline void ParCompactionManager::follow_contents(oop obj) { 93 assert(PSParallelCompact::mark_bitmap()->is_marked(obj), "should be marked"); 94 obj->pc_follow_contents(this); 95 } 96 97 template <class T> 98 inline void oop_pc_follow_contents_specialized(objArrayOop obj, int index, ParCompactionManager* cm) { 99 const size_t len = size_t(obj->length()); 100 const size_t beg_index = size_t(index); 101 assert(beg_index < len || len == 0, "index too large"); 102 103 const size_t stride = MIN2(len - beg_index, ObjArrayMarkingStride); 104 const size_t end_index = beg_index + stride; 105 T* const base = (T*)obj->base(); 106 T* const beg = base + beg_index; 107 T* const end = base + end_index; 108 109 // Push the non-NULL elements of the next stride on the marking stack. 110 for (T* e = beg; e < end; e++) { 111 cm->mark_and_push<T>(e); 112 } 113 114 if (end_index < len) { 115 cm->push_objarray(obj, end_index); // Push the continuation. 116 } 117 } 118 119 inline void ParCompactionManager::follow_contents(objArrayOop obj, int index) { 120 if (UseCompressedOops) { 121 oop_pc_follow_contents_specialized<narrowOop>(obj, index, this); 122 } else { 123 oop_pc_follow_contents_specialized<oop>(obj, index, this); 124 } 125 } 126 127 inline void ParCompactionManager::update_contents(oop obj) { 128 obj->pc_update_contents(); 129 } 130 131 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSCOMPACTIONMANAGER_INLINE_HPP