1 /* 2 * Copyright (c) 2015, 2018, 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_ZPAGE_HPP 25 #define SHARE_GC_Z_ZPAGE_HPP 26 27 #include "gc/z/zForwardingTable.hpp" 28 #include "gc/z/zList.hpp" 29 #include "gc/z/zLiveMap.hpp" 30 #include "gc/z/zPhysicalMemory.hpp" 31 #include "gc/z/zVirtualMemory.hpp" 32 #include "memory/allocation.hpp" 33 34 class ZPage : public CHeapObj<mtGC> { 35 friend class VMStructs; 36 friend class ZList<ZPage>; 37 38 private: 39 // Always hot 40 const uint8_t _type; // Page type 41 volatile uint8_t _pinned; // Pinned flag 42 uint8_t _numa_id; // NUMA node affinity 43 uint32_t _seqnum; // Allocation sequence number 44 const ZVirtualMemory _virtual; // Virtual start/end address 45 volatile uintptr_t _top; // Virtual top address 46 ZLiveMap _livemap; // Live map 47 48 // Hot when relocated and cached 49 volatile uint32_t _refcount; // Page reference count 50 ZForwardingTable _forwarding; // Forwarding table 51 ZPhysicalMemory _physical; // Physical memory for page 52 ZListNode<ZPage> _node; // Page list node 53 54 const char* type_to_string() const; 55 uint32_t object_max_count() const; 56 uintptr_t relocate_object_inner(uintptr_t from_index, uintptr_t from_offset); 57 58 bool is_object_marked(uintptr_t addr) const; 59 bool is_object_strongly_marked(uintptr_t addr) const; 60 61 public: 62 ZPage(uint8_t type, ZVirtualMemory vmem, ZPhysicalMemory pmem); 63 ~ZPage(); 64 65 size_t object_alignment_shift() const; 66 size_t object_alignment() const; 67 68 uint8_t type() const; 69 uintptr_t start() const; 70 uintptr_t end() const; 71 size_t size() const; 72 uintptr_t top() const; 73 size_t remaining() const; 74 75 uint8_t numa_id(); 76 77 ZPhysicalMemory& physical_memory(); 78 const ZVirtualMemory& virtual_memory() const; 79 80 void reset(); 81 82 bool inc_refcount(); 83 bool dec_refcount(); 84 85 bool is_in(uintptr_t addr) const; 86 87 uintptr_t block_start(uintptr_t addr) const; 88 size_t block_size(uintptr_t addr) const; 89 bool block_is_obj(uintptr_t addr) const; 90 91 bool is_active() const; 92 bool is_allocating() const; 93 bool is_relocatable() const; 94 bool is_detached() const; 95 96 bool is_mapped() const; 97 void set_pre_mapped(); 98 99 bool is_pinned() const; 100 void set_pinned(); 101 102 bool is_forwarding() const; 103 void set_forwarding(); 104 void reset_forwarding(); 105 void verify_forwarding() const; 106 107 bool is_marked() const; 108 bool is_object_live(uintptr_t addr) const; 109 bool is_object_strongly_live(uintptr_t addr) const; 110 bool mark_object(uintptr_t addr, bool finalizable, bool& inc_live); 111 112 void inc_live_atomic(uint32_t objects, size_t bytes); 113 size_t live_bytes() const; 114 115 void object_iterate(ObjectClosure* cl); 116 117 uintptr_t alloc_object(size_t size); 118 uintptr_t alloc_object_atomic(size_t size); 119 120 bool undo_alloc_object(uintptr_t addr, size_t size); 121 bool undo_alloc_object_atomic(uintptr_t addr, size_t size); 122 123 uintptr_t relocate_object(uintptr_t from); 124 uintptr_t forward_object(uintptr_t from); 125 126 void print_on(outputStream* out) const; 127 void print() const; 128 }; 129 130 #endif // SHARE_GC_Z_ZPAGE_HPP