1 /* 2 * Copyright (c) 2015, 2020, 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 #ifndef SHARE_GC_Z_ZHEAP_HPP 25 #define SHARE_GC_Z_ZHEAP_HPP 26 27 #include "gc/z/zAllocationFlags.hpp" 28 #include "gc/z/zForwardingTable.hpp" 29 #include "gc/z/zMark.hpp" 30 #include "gc/z/zObjectAllocator.hpp" 31 #include "gc/z/zPage.hpp" 32 #include "gc/z/zPageAllocator.hpp" 33 #include "gc/z/zPageTable.hpp" 34 #include "gc/z/zReferenceProcessor.hpp" 35 #include "gc/z/zRelocate.hpp" 36 #include "gc/z/zRelocationSet.hpp" 37 #include "gc/z/zWeakRootsProcessor.hpp" 38 #include "gc/z/zServiceability.hpp" 39 #include "gc/z/zUnload.hpp" 40 #include "gc/z/zWorkers.hpp" 41 42 class ThreadClosure; 43 44 class ZHeap { 45 friend class VMStructs; 46 47 private: 48 static ZHeap* _heap; 49 50 ZWorkers _workers; 51 ZObjectAllocator _object_allocator; 52 ZPageAllocator _page_allocator; 53 ZPageTable _page_table; 54 ZForwardingTable _forwarding_table; 55 ZMark _mark; 56 ZReferenceProcessor _reference_processor; 57 ZWeakRootsProcessor _weak_roots_processor; 58 ZRelocate _relocate; 59 ZRelocationSet _relocation_set; 60 ZUnload _unload; 61 ZServiceability _serviceability; 62 63 void flip_to_marked(); 64 void flip_to_remapped(); 65 66 void out_of_memory(); 67 68 public: 69 static ZHeap* heap(); 70 71 ZHeap(); 72 73 bool is_initialized() const; 74 75 // Heap metrics 76 size_t min_capacity() const; 77 size_t max_capacity() const; 78 size_t soft_max_capacity() const; 79 size_t capacity() const; 80 size_t max_reserve() const; 81 size_t used_high() const; 82 size_t used_low() const; 83 size_t used() const; 84 size_t unused() const; 85 size_t allocated() const; 86 size_t reclaimed() const; 87 88 size_t tlab_capacity() const; 89 size_t tlab_used() const; 90 size_t max_tlab_size() const; 91 size_t unsafe_max_tlab_alloc() const; 92 93 bool is_in(uintptr_t addr) const; 94 uint32_t hash_oop(uintptr_t addr) const; 95 96 // Threads 97 uint nconcurrent_worker_threads() const; 98 uint nconcurrent_no_boost_worker_threads() const; 99 void set_boost_worker_threads(bool boost); 100 void threads_do(ThreadClosure* tc) const; 101 void run_task(AbstractGangTask* task); 102 103 // Reference processing 104 ReferenceDiscoverer* reference_discoverer(); 105 void set_soft_reference_policy(bool clear); 106 107 // Non-strong reference processing 108 void process_non_strong_references(); 109 110 // Page allocation 111 ZPage* alloc_page(uint8_t type, size_t size, ZAllocationFlags flags); 112 void undo_alloc_page(ZPage* page); 113 void free_page(ZPage* page, bool reclaimed); 114 115 // Object allocation 116 uintptr_t alloc_tlab(size_t size); 117 uintptr_t alloc_object(size_t size); 118 uintptr_t alloc_object_for_relocation(size_t size); 119 void undo_alloc_object_for_relocation(uintptr_t addr, size_t size); 120 bool is_alloc_stalled() const; 121 void check_out_of_memory(); 122 123 // Marking 124 bool is_object_live(uintptr_t addr) const; 125 bool is_object_strongly_live(uintptr_t addr) const; 126 template <bool follow, bool finalizable, bool publish> void mark_object(uintptr_t addr); 127 void mark_start(); 128 void mark(bool initial); 129 void mark_flush_and_free(Thread* thread); 130 bool mark_end(); 131 void keep_alive(oop obj); 132 133 // Relocation set 134 void select_relocation_set(); 135 void reset_relocation_set(); 136 137 // Relocation 138 void relocate_start(); 139 uintptr_t relocate_object(uintptr_t addr); 140 uintptr_t remap_object(uintptr_t addr); 141 void relocate(); 142 143 // Iteration 144 void object_iterate(ObjectClosure* cl, bool visit_weaks); 145 void pages_do(ZPageClosure* cl); 146 147 // Serviceability 148 void serviceability_initialize(); 149 GCMemoryManager* serviceability_memory_manager(); 150 MemoryPool* serviceability_memory_pool(); 151 ZServiceabilityCounters* serviceability_counters(); 152 153 // Printing 154 void print_on(outputStream* st) const; 155 void print_extended_on(outputStream* st) const; 156 bool print_location(outputStream* st, uintptr_t addr) const; 157 158 // Verification 159 bool is_oop(uintptr_t addr) const; 160 void verify(); 161 }; 162 163 #endif // SHARE_GC_Z_ZHEAP_HPP