1 /*
2 * Copyright (c) 2015, 2018, Red Hat, Inc. All rights reserved.
3 *
4 * This code is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 only, as
6 * published by the Free Software Foundation.
7 *
8 * This code is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
11 * version 2 for more details (a copy is included in the LICENSE file that
12 * accompanied this code).
13 *
14 * You should have received a copy of the GNU General Public License version
15 * 2 along with this work; if not, write to the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
19 * or visit www.oracle.com if you need additional information or have any
20 * questions.
21 *
22 */
23
24 #ifndef SHARE_VM_GC_SHENANDOAH_SHENANDOAHHEAPREGION_INLINE_HPP
25 #define SHARE_VM_GC_SHENANDOAH_SHENANDOAHHEAPREGION_INLINE_HPP
26
27 #include "gc/shenandoah/shenandoahHeap.inline.hpp"
28 #include "gc/shenandoah/shenandoahHeapRegion.hpp"
29 #include "gc/shenandoah/shenandoahPacer.inline.hpp"
30 #include "runtime/atomic.hpp"
31
allocate(size_t size,ShenandoahAllocRequest::Type type)32 HeapWord* ShenandoahHeapRegion::allocate(size_t size, ShenandoahAllocRequest::Type type) {
33 _heap->assert_heaplock_or_safepoint();
34
35 assert(is_object_aligned(size), "alloc size breaks alignment: " SIZE_FORMAT, size);
36
37 HeapWord* obj = top();
38 if (pointer_delta(end(), obj) >= size) {
39 make_regular_allocation();
40 adjust_alloc_metadata(type, size);
41
42 HeapWord* new_top = obj + size;
43 set_top(new_top);
44
45 assert(is_object_aligned(new_top), "new top breaks alignment: " PTR_FORMAT, p2i(new_top));
46 assert(is_object_aligned(obj), "obj is not aligned: " PTR_FORMAT, p2i(obj));
47
48 return obj;
49 } else {
50 return NULL;
51 }
52 }
53
adjust_alloc_metadata(ShenandoahAllocRequest::Type type,size_t size)54 inline void ShenandoahHeapRegion::adjust_alloc_metadata(ShenandoahAllocRequest::Type type, size_t size) {
55 bool is_first_alloc = (top() == bottom());
56
57 switch (type) {
58 case ShenandoahAllocRequest::_alloc_shared:
59 case ShenandoahAllocRequest::_alloc_tlab:
60 _seqnum_last_alloc_mutator = _alloc_seq_num.value++;
61 if (is_first_alloc) {
62 assert (_seqnum_first_alloc_mutator == 0, "Region " SIZE_FORMAT " metadata is correct", _region_number);
63 _seqnum_first_alloc_mutator = _seqnum_last_alloc_mutator;
64 }
65 break;
66 case ShenandoahAllocRequest::_alloc_shared_gc:
67 case ShenandoahAllocRequest::_alloc_gclab:
68 _seqnum_last_alloc_gc = _alloc_seq_num.value++;
69 if (is_first_alloc) {
70 assert (_seqnum_first_alloc_gc == 0, "Region " SIZE_FORMAT " metadata is correct", _region_number);
71 _seqnum_first_alloc_gc = _seqnum_last_alloc_gc;
72 }
73 break;
74 default:
75 ShouldNotReachHere();
76 }
77
78 switch (type) {
79 case ShenandoahAllocRequest::_alloc_shared:
80 case ShenandoahAllocRequest::_alloc_shared_gc:
81 _shared_allocs += size;
82 break;
83 case ShenandoahAllocRequest::_alloc_tlab:
84 _tlab_allocs += size;
85 break;
86 case ShenandoahAllocRequest::_alloc_gclab:
87 _gclab_allocs += size;
88 break;
89 default:
90 ShouldNotReachHere();
91 }
92 }
93
increase_live_data_alloc_words(size_t s)94 inline void ShenandoahHeapRegion::increase_live_data_alloc_words(size_t s) {
95 internal_increase_live_data(s);
96 }
97
increase_live_data_gc_words(size_t s)98 inline void ShenandoahHeapRegion::increase_live_data_gc_words(size_t s) {
99 internal_increase_live_data(s);
100 if (ShenandoahPacing) {
101 _heap->pacer()->report_mark(s);
102 }
103 }
104
internal_increase_live_data(size_t s)105 inline void ShenandoahHeapRegion::internal_increase_live_data(size_t s) {
106 size_t new_live_data = Atomic::add(s, &_live_data);
107 #ifdef ASSERT
108 size_t live_bytes = new_live_data * HeapWordSize;
109 size_t used_bytes = used();
110 assert(live_bytes <= used_bytes,
111 "can't have more live data than used: " SIZE_FORMAT ", " SIZE_FORMAT, live_bytes, used_bytes);
112 #endif
113 }
114
115 #endif // SHARE_VM_GC_SHENANDOAH_SHENANDOAHHEAPREGION_INLINE_HPP
116