Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1BlockOffsetTable.inline.hpp @ 2951:0c0e407faa39
another fix to debug info (on-stack parameters), DCE removes unnecessary merges and LoopBegins whose LoopEnd went away
author | Lukas Stadler <lukas.stadler@jku.at> |
---|---|
date | Tue, 14 Jun 2011 16:47:31 +0200 |
parents | f95d63e2154a |
children | da91efe96a93 |
rev | line source |
---|---|
342 | 1 /* |
1972 | 2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. |
342 | 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 * | |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
845
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
845
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
845
diff
changeset
|
21 * questions. |
342 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1BLOCKOFFSETTABLE_INLINE_HPP |
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1BLOCKOFFSETTABLE_INLINE_HPP | |
27 | |
28 #include "gc_implementation/g1/g1BlockOffsetTable.hpp" | |
29 #include "memory/space.hpp" | |
30 | |
342 | 31 inline HeapWord* G1BlockOffsetTable::block_start(const void* addr) { |
32 if (addr >= _bottom && addr < _end) { | |
33 return block_start_unsafe(addr); | |
34 } else { | |
35 return NULL; | |
36 } | |
37 } | |
38 | |
39 inline HeapWord* | |
40 G1BlockOffsetTable::block_start_const(const void* addr) const { | |
41 if (addr >= _bottom && addr < _end) { | |
42 return block_start_unsafe_const(addr); | |
43 } else { | |
44 return NULL; | |
45 } | |
46 } | |
47 | |
48 inline size_t G1BlockOffsetSharedArray::index_for(const void* p) const { | |
49 char* pc = (char*)p; | |
50 assert(pc >= (char*)_reserved.start() && | |
51 pc < (char*)_reserved.end(), | |
52 "p not in range."); | |
53 size_t delta = pointer_delta(pc, _reserved.start(), sizeof(char)); | |
54 size_t result = delta >> LogN; | |
55 assert(result < _vs.committed_size(), "bad index from address"); | |
56 return result; | |
57 } | |
58 | |
59 inline HeapWord* | |
60 G1BlockOffsetSharedArray::address_for_index(size_t index) const { | |
61 assert(index < _vs.committed_size(), "bad index"); | |
62 HeapWord* result = _reserved.start() + (index << LogN_words); | |
63 assert(result >= _reserved.start() && result < _reserved.end(), | |
64 "bad address from index"); | |
65 return result; | |
66 } | |
67 | |
68 inline HeapWord* | |
69 G1BlockOffsetArray::block_at_or_preceding(const void* addr, | |
70 bool has_max_index, | |
71 size_t max_index) const { | |
72 assert(_array->offset_array(0) == 0, "objects can't cross covered areas"); | |
73 size_t index = _array->index_for(addr); | |
74 // We must make sure that the offset table entry we use is valid. If | |
75 // "addr" is past the end, start at the last known one and go forward. | |
76 if (has_max_index) { | |
77 index = MIN2(index, max_index); | |
78 } | |
79 HeapWord* q = _array->address_for_index(index); | |
80 | |
81 uint offset = _array->offset_array(index); // Extend u_char to uint. | |
82 while (offset >= N_words) { | |
83 // The excess of the offset from N_words indicates a power of Base | |
84 // to go back by. | |
85 size_t n_cards_back = BlockOffsetArray::entry_to_cards_back(offset); | |
86 q -= (N_words * n_cards_back); | |
87 assert(q >= _sp->bottom(), "Went below bottom!"); | |
88 index -= n_cards_back; | |
89 offset = _array->offset_array(index); | |
90 } | |
91 assert(offset < N_words, "offset too large"); | |
92 q -= offset; | |
93 return q; | |
94 } | |
95 | |
96 inline HeapWord* | |
97 G1BlockOffsetArray:: | |
98 forward_to_block_containing_addr_const(HeapWord* q, HeapWord* n, | |
99 const void* addr) const { | |
100 if (csp() != NULL) { | |
101 if (addr >= csp()->top()) return csp()->top(); | |
102 while (n <= addr) { | |
103 q = n; | |
104 oop obj = oop(q); | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
342
diff
changeset
|
105 if (obj->klass_or_null() == NULL) return q; |
342 | 106 n += obj->size(); |
107 } | |
108 } else { | |
109 while (n <= addr) { | |
110 q = n; | |
111 oop obj = oop(q); | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
342
diff
changeset
|
112 if (obj->klass_or_null() == NULL) return q; |
342 | 113 n += _sp->block_size(q); |
114 } | |
115 } | |
116 assert(q <= n, "wrong order for q and addr"); | |
117 assert(addr < n, "wrong order for addr and n"); | |
118 return q; | |
119 } | |
120 | |
121 inline HeapWord* | |
122 G1BlockOffsetArray::forward_to_block_containing_addr(HeapWord* q, | |
123 const void* addr) { | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
342
diff
changeset
|
124 if (oop(q)->klass_or_null() == NULL) return q; |
342 | 125 HeapWord* n = q + _sp->block_size(q); |
126 // In the normal case, where the query "addr" is a card boundary, and the | |
127 // offset table chunks are the same size as cards, the block starting at | |
128 // "q" will contain addr, so the test below will fail, and we'll fall | |
129 // through quickly. | |
130 if (n <= addr) { | |
131 q = forward_to_block_containing_addr_slow(q, n, addr); | |
132 } | |
133 assert(q <= addr, "wrong order for current and arg"); | |
134 return q; | |
135 } | |
136 | |
137 ////////////////////////////////////////////////////////////////////////// | |
138 // BlockOffsetArrayNonContigSpace inlines | |
139 ////////////////////////////////////////////////////////////////////////// | |
140 inline void G1BlockOffsetArray::freed(HeapWord* blk_start, HeapWord* blk_end) { | |
141 // Verify that the BOT shows [blk_start, blk_end) to be one block. | |
142 verify_single_block(blk_start, blk_end); | |
143 // adjust _unallocated_block upward or downward | |
144 // as appropriate | |
145 if (BlockOffsetArrayUseUnallocatedBlock) { | |
146 assert(_unallocated_block <= _end, | |
147 "Inconsistent value for _unallocated_block"); | |
148 if (blk_end >= _unallocated_block && blk_start <= _unallocated_block) { | |
149 // CMS-specific note: a block abutting _unallocated_block to | |
150 // its left is being freed, a new block is being added or | |
151 // we are resetting following a compaction | |
152 _unallocated_block = blk_start; | |
153 } | |
154 } | |
155 } | |
156 | |
157 inline void G1BlockOffsetArray::freed(HeapWord* blk, size_t size) { | |
158 freed(blk, blk + size); | |
159 } | |
1972 | 160 |
161 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1BLOCKOFFSETTABLE_INLINE_HPP |