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_ZHEAP_HPP
25 #define SHARE_GC_Z_ZHEAP_HPP
26
27 #include "gc/shared/gcTimer.hpp"
28 #include "gc/z/zAllocationFlags.hpp"
29 #include "gc/z/zArray.hpp"
30 #include "gc/z/zInitialize.hpp"
31 #include "gc/z/zList.hpp"
32 #include "gc/z/zLock.hpp"
33 #include "gc/z/zMark.hpp"
34 #include "gc/z/zObjectAllocator.hpp"
35 #include "gc/z/zPage.hpp"
36 #include "gc/z/zPageAllocator.hpp"
37 #include "gc/z/zPageTable.hpp"
38 #include "gc/z/zReferenceProcessor.hpp"
39 #include "gc/z/zRelocate.hpp"
40 #include "gc/z/zRelocationSet.hpp"
41 #include "gc/z/zRelocationSetSelector.hpp"
42 #include "gc/z/zRootsIterator.hpp"
43 #include "gc/z/zWeakRootsProcessor.hpp"
44 #include "gc/z/zServiceability.hpp"
45 #include "gc/z/zWorkers.hpp"
46 #include "memory/allocation.hpp"
47
48 class ZHeap VALUE_OBJ_CLASS_SPEC {
49 friend class VMStructs;
50
51 private:
52 static ZHeap* _heap;
53
54 ZInitialize _initialize;
55 ZWorkers _workers;
56 ZObjectAllocator _object_allocator;
57 ZPageAllocator _page_allocator;
58 ZPageTable _pagetable;
59 ZMark _mark;
60 ZReferenceProcessor _reference_processor;
61 ZWeakRootsProcessor _weak_roots_processor;
62 ZRelocate _relocate;
63 ZRelocationSet _relocation_set;
64 ZServiceability _serviceability;
65
66 size_t heap_min_size() const;
67 size_t heap_max_size() const;
68 size_t heap_max_reserve_size() const;
69
70 void out_of_memory();
71 void flip_views();
72 void fixup_partial_loads();
73
74 public:
75 static ZHeap* heap();
76
77 ZHeap();
78
79 bool is_initialized() const;
80
81 // Heap metrics
82 size_t min_capacity() const;
83 size_t max_capacity() const;
84 size_t capacity() const;
85 size_t max_reserve() const;
86 size_t used_high() const;
87 size_t used_low() const;
88 size_t used() const;
89 size_t allocated() const;
90 size_t reclaimed() const;
91
92 size_t tlab_capacity() const;
93 size_t tlab_used() const;
94 size_t max_tlab_size() const;
95 size_t unsafe_max_tlab_alloc() const;
96
97 bool is_in(uintptr_t addr) const;
98
99 // Block
100 uintptr_t block_start(uintptr_t addr) const;
101 size_t block_size(uintptr_t addr) const;
102 bool block_is_obj(uintptr_t addr) const;
103
104 // Raw pagetable exposed for barriers
105 ZPageTableEntry* pagetable_addr() const;
106
107 // Workers
108 uint nconcurrent_worker_threads() const;
109 uint nconcurrent_no_boost_worker_threads() const;
110 void set_boost_worker_threads(bool boost);
111 void worker_threads_do(ThreadClosure* tc) const;
112 void print_worker_threads_on(outputStream* st) const;
113
114 // Reference processing
115 ReferenceDiscoverer* reference_discoverer();
116 void set_soft_reference_policy(bool clear);
117
118 // Non-strong reference processing
119 void process_non_strong_references();
120
121 // Page allocation
122 ZPage* alloc_page(uint8_t type, size_t size, ZAllocationFlags flags);
123 void undo_alloc_page(ZPage* page);
124 bool retain_page(ZPage* page);
125 void release_page(ZPage* page, bool reclaimed);
126
127 // Object allocation
128 uintptr_t alloc_tlab(size_t size);
129 uintptr_t alloc_object(size_t size);
130 uintptr_t alloc_object_for_relocation(size_t size);
131 void undo_alloc_object_for_relocation(uintptr_t addr, size_t size);
132 void check_out_of_memory();
133
134 // Marking
135 bool is_object_live(uintptr_t addr) const;
136 bool is_object_strongly_live(uintptr_t addr) const;
137 template <bool finalizable, bool publish> void mark_object(uintptr_t addr);
138 void mark_start();
139 void mark();
140 void mark_flush_and_free();
141 bool mark_end();
142
143 // Post-marking & Pre-relocation
144 void destroy_detached_pages();
145
146 // Relocation set
147 void select_relocation_set();
148 void prepare_relocation_set();
149 void reset_relocation_set();
150
151 // Relocation
152 bool is_relocating(uintptr_t addr) const;
153 void relocate_start();
154 uintptr_t relocate_object(uintptr_t addr);
155 uintptr_t forward_object(uintptr_t addr);
156 void relocate();
157
158 // Iteration
159 void object_iterate(ObjectClosure* cl);
160
161 // Serviceability
162 void serviceability_initialize();
163 GCMemoryManager* serviceability_memory_manager();
164 MemoryPool* serviceability_memory_pool();
165 ZServiceabilityCounters* serviceability_counters();
166
167 // Printing
168 void print_on(outputStream* st) const;
169 void print_extended_on(outputStream* st) const;
170
171 // Verification
172 bool is_oop(oop object) const;
173 void verify();
174 };
175
176 #endif // SHARE_GC_Z_ZHEAP_HPP