Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1BlockOffsetTable.inline.hpp @ 6629:c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
Summary: Add the flags G1EvacuationFailureALot flag (and supporting flags) to force trigger evacuation failures. The support flags control how often to trigger an evacuation failure and during which types of evacuation pause. This functionality is analogous to that of PromotionFailureALot for the other collectors.
Reviewed-by: brutisso
| author | johnc |
|---|---|
| date | Tue, 28 Aug 2012 15:20:08 -0700 |
| 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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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); | |
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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); | |
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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) { | |
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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 |