1 /*
2 * Copyright (c) 2015, 2017, 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 ZList<ZPage>;
36
37 private:
38 // First cacheline (always hot)
39 const uint8_t _type; // Page type
40 volatile uint8_t _pinned; // Pinned flag
41 uint8_t _numa_id; // NUMA node affinity
42 uint32_t _seqnum; // Allocation sequence number
43 const ZVirtualMemory _virtual; // Virtual start/end address
44 volatile uintptr_t _top; // Virtual top address
45 ZLiveMap _livemap; // Live map
46
47 // Second cacheline (hot when relocated and cached)
48 volatile uint32_t _refcount; // Page reference count
49 ZForwardingTable _forwarding; // Forwarding table
50 ZPhysicalMemory _physical; // Physical memory for page
51 ZListNode<ZPage> _node; // Page list node
52
53 const char* type_to_string() const;
54 uint32_t object_max_count() const;
55 uintptr_t relocate_object_inner(uintptr_t from_index, uintptr_t from_offset);
56
57 bool is_object_marked(uintptr_t addr) const;
58 bool is_object_strongly_marked(uintptr_t addr) const;
59
60 public:
61 ZPage(uint8_t type, ZVirtualMemory vmem, ZPhysicalMemory pmem);
62 ~ZPage();
63
64 size_t object_alignment_shift() const;
65 size_t object_alignment() const;
66
67 uint8_t type() const;
68 uintptr_t start() const;
69 uintptr_t end() const;
70 size_t size() const;
71 uintptr_t top() const;
72 size_t remaining() const;
73
74 uint8_t numa_id();
75
76 ZPhysicalMemory& physical_memory();
77 const ZVirtualMemory& virtual_memory() const;
78
79 void reset();
80
81 bool inc_refcount();
82 bool dec_refcount();
83
84 bool is_in(uintptr_t addr) const;
85
86 uintptr_t block_start(uintptr_t addr) const;
87 size_t block_size(uintptr_t addr) const;
88 bool block_is_obj(uintptr_t addr) const;
89
90 bool is_active() const;
91 bool is_allocating() const;
92 bool is_relocatable() const;
93 bool is_detached() const;
94
95 bool is_mapped() const;
96 void set_pre_mapped();
97
98 bool is_pinned() const;
99 void set_pinned();
100
101 bool is_forwarding() const;
102 void set_forwarding();
103 void reset_forwarding();
104 void verify_forwarding() const;
105
106 bool is_marked() const;
107 bool is_object_live(uintptr_t addr) const;
108 bool is_object_strongly_live(uintptr_t addr) const;
109 bool mark_object(uintptr_t addr, bool finalizable, bool& inc_live);
110
111 void inc_live_atomic(uint32_t objects, size_t bytes);
112 size_t live_bytes() const;
113
114 void object_iterate(ObjectClosure* cl);
115
116 uintptr_t alloc_object(size_t size);
117 uintptr_t alloc_object_atomic(size_t size);
118
119 bool undo_alloc_object(uintptr_t addr, size_t size);
120 bool undo_alloc_object_atomic(uintptr_t addr, size_t size);
121
122 uintptr_t relocate_object(uintptr_t from);
123 uintptr_t forward_object(uintptr_t from);
124
125 void print_on(outputStream* out) const;
126 void print() const;
127 };
128
129 #endif // SHARE_GC_Z_ZPAGE_HPP