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
25 #ifndef SHARE_VM_GC_G1_G1ALLOCATOR_INLINE_HPP
26 #define SHARE_VM_GC_G1_G1ALLOCATOR_INLINE_HPP
27
28 #include "gc/g1/g1Allocator.hpp"
29 #include "gc/g1/g1AllocRegion.inline.hpp"
30 #include "gc/shared/plab.inline.hpp"
31
32 HeapWord* G1Allocator::attempt_allocation(size_t word_size, AllocationContext_t context) {
33 return mutator_alloc_region(context)->attempt_allocation(word_size, false /* bot_updates */);
34 }
35
36 HeapWord* G1Allocator::attempt_allocation_locked(size_t word_size, AllocationContext_t context) {
37 HeapWord* result = mutator_alloc_region(context)->attempt_allocation_locked(word_size, false /* bot_updates */);
38 assert(result != NULL || mutator_alloc_region(context)->get() == NULL,
39 "Must not have a mutator alloc region if there is no memory, but is " PTR_FORMAT, p2i(mutator_alloc_region(context)->get()));
40 return result;
41 }
42
43 HeapWord* G1Allocator::attempt_allocation_force(size_t word_size, AllocationContext_t context) {
44 return mutator_alloc_region(context)->attempt_allocation_force(word_size, false /* bot_updates */);
45 }
46
47 inline HeapWord* G1PLABAllocator::plab_allocate(InCSetState dest,
48 size_t word_sz,
49 AllocationContext_t context) {
50 G1PLAB* buffer = alloc_buffer(dest, context);
51 if (_survivor_alignment_bytes == 0 || !dest.is_young()) {
52 return buffer->allocate(word_sz);
53 } else {
54 return buffer->allocate_aligned(word_sz, _survivor_alignment_bytes);
55 }
56 }
57
58 // Create the maps which is used to identify archive objects.
59 inline void G1ArchiveAllocator::enable_archive_object_check() {
60 if (_archive_check_enabled) {
61 return;
62 }
63
64 _archive_check_enabled = true;
65 size_t length = Universe::heap()->max_capacity();
66 _closed_archive_region_map.initialize((HeapWord*)Universe::heap()->base(),
67 (HeapWord*)Universe::heap()->base() + length,
68 HeapRegion::GrainBytes);
69 _open_archive_region_map.initialize((HeapWord*)Universe::heap()->base(),
70 (HeapWord*)Universe::heap()->base() + length,
71 HeapRegion::GrainBytes);
72 }
73
74 // Set the regions containing the specified address range as archive.
75 inline void G1ArchiveAllocator::set_range_archive(MemRegion range, bool open) {
76 assert(_archive_check_enabled, "archive range check not enabled");
77 if (open) {
78 _open_archive_region_map.set_by_address(range, true);
79 } else {
80 _closed_archive_region_map.set_by_address(range, true);
81 }
82 }
83
84 // Check if an object is in a closed archive region using the _archive_region_map.
85 inline bool G1ArchiveAllocator::in_closed_archive_range(oop object) {
86 // This is the out-of-line part of is_closed_archive_object test, done separately
87 // to avoid additional performance impact when the check is not enabled.
88 return _closed_archive_region_map.get_by_address((HeapWord*)object);
89 }
90
91 inline bool G1ArchiveAllocator::in_open_archive_range(oop object) {
92 return _open_archive_region_map.get_by_address((HeapWord*)object);
93 }
94
95 // Check if archive object checking is enabled, to avoid calling in_open/closed_archive_range
96 // unnecessarily.
97 inline bool G1ArchiveAllocator::archive_check_enabled() {
98 return _archive_check_enabled;
99 }
100
101 inline bool G1ArchiveAllocator::is_closed_archive_object(oop object) {
102 return (archive_check_enabled() && in_closed_archive_range(object));
103 }
104
105 inline bool G1ArchiveAllocator::is_open_archive_object(oop object) {
106 return (archive_check_enabled() && in_open_archive_range(object));
107 }
108
109 inline bool G1ArchiveAllocator::is_archive_object(oop object) {
110 return (archive_check_enabled() && (in_closed_archive_range(object) ||
111 in_open_archive_range(object)));
112 }
113
114 #endif // SHARE_VM_GC_G1_G1ALLOCATOR_HPP