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src/share/vm/gc_implementation/g1/heapRegion.inline.hpp@4dfb2df418f2 (annotated)
src/share/vm/gc_implementation/g1/heapRegion.inline.hpp
Thu, 22 Sep 2011 10:57:37 -0700
- author
- johnc
- date
- Thu, 22 Sep 2011 10:57:37 -0700
- changeset 3175
- 4dfb2df418f2
- parent 2715
- abdfc822206f
- child 3416
- 2ace1c4ee8da
- permissions
- -rw-r--r--
6484982: G1: process references during evacuation pauses
Summary: G1 now uses two reference processors - one is used by concurrent marking and the other is used by STW GCs (both full and incremental evacuation pauses). In an evacuation pause, the reference processor is embedded into the closures used to scan objects. Doing so causes causes reference objects to be 'discovered' by the reference processor. At the end of the evacuation pause, these discovered reference objects are processed - preserving (and copying) referent objects (and their reachable graphs) as appropriate.
Reviewed-by: ysr, jwilhelm, brutisso, stefank, tonyp
| ysr@777 | 1 | /* |
| stefank@2314 | 2 | * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. |
| ysr@777 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| ysr@777 | 4 | * |
| ysr@777 | 5 | * This code is free software; you can redistribute it and/or modify it |
| ysr@777 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| ysr@777 | 7 | * published by the Free Software Foundation. |
| ysr@777 | 8 | * |
| ysr@777 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| ysr@777 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| ysr@777 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| ysr@777 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| ysr@777 | 13 | * accompanied this code). |
| ysr@777 | 14 | * |
| ysr@777 | 15 | * You should have received a copy of the GNU General Public License version |
| ysr@777 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| ysr@777 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| ysr@777 | 18 | * |
| trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
| trims@1907 | 21 | * questions. |
| ysr@777 | 22 | * |
| ysr@777 | 23 | */ |
| ysr@777 | 24 | |
| stefank@2314 | 25 | #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGION_INLINE_HPP |
| stefank@2314 | 26 | #define SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGION_INLINE_HPP |
| stefank@2314 | 27 | |
| ysr@777 | 28 | inline HeapWord* G1OffsetTableContigSpace::allocate(size_t size) { |
| ysr@777 | 29 | HeapWord* res = ContiguousSpace::allocate(size); |
| ysr@777 | 30 | if (res != NULL) { |
| ysr@777 | 31 | _offsets.alloc_block(res, size); |
| ysr@777 | 32 | } |
| ysr@777 | 33 | return res; |
| ysr@777 | 34 | } |
| ysr@777 | 35 | |
| ysr@777 | 36 | // Because of the requirement of keeping "_offsets" up to date with the |
| ysr@777 | 37 | // allocations, we sequentialize these with a lock. Therefore, best if |
| ysr@777 | 38 | // this is used for larger LAB allocations only. |
| ysr@777 | 39 | inline HeapWord* G1OffsetTableContigSpace::par_allocate(size_t size) { |
| ysr@777 | 40 | MutexLocker x(&_par_alloc_lock); |
| tonyp@2715 | 41 | // Given that we take the lock no need to use par_allocate() here. |
| tonyp@2715 | 42 | HeapWord* res = ContiguousSpace::allocate(size); |
| ysr@777 | 43 | if (res != NULL) { |
| ysr@777 | 44 | _offsets.alloc_block(res, size); |
| ysr@777 | 45 | } |
| ysr@777 | 46 | return res; |
| ysr@777 | 47 | } |
| ysr@777 | 48 | |
| ysr@777 | 49 | inline HeapWord* G1OffsetTableContigSpace::block_start(const void* p) { |
| ysr@777 | 50 | return _offsets.block_start(p); |
| ysr@777 | 51 | } |
| ysr@777 | 52 | |
| ysr@777 | 53 | inline HeapWord* |
| ysr@777 | 54 | G1OffsetTableContigSpace::block_start_const(const void* p) const { |
| ysr@777 | 55 | return _offsets.block_start_const(p); |
| ysr@777 | 56 | } |
| stefank@2314 | 57 | |
| stefank@2314 | 58 | #endif // SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGION_INLINE_HPP |
