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src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp@595c0f60d50d (annotated)
src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp
Tue, 18 Mar 2014 19:07:22 +0100
- author
- pliden
- date
- Tue, 18 Mar 2014 19:07:22 +0100
- changeset 6413
- 595c0f60d50d
- parent 3466
- b4ebad3520bb
- child 6876
- 710a3c8b516e
- child 6937
- b0c374311c4e
- permissions
- -rw-r--r--
8029075: String deduplication in G1
Summary: Implementation of JEP 192, http://openjdk.java.net/jeps/192
Reviewed-by: brutisso, tschatzl, coleenp
| ysr@777 | 1 | /* |
| johnc@3466 | 2 | * Copyright (c) 2001, 2012, 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_G1REMSET_INLINE_HPP |
| stefank@2314 | 26 | #define SHARE_VM_GC_IMPLEMENTATION_G1_G1REMSET_INLINE_HPP |
| stefank@2314 | 27 | |
| stefank@2314 | 28 | #include "gc_implementation/g1/g1RemSet.hpp" |
| stefank@2314 | 29 | #include "gc_implementation/g1/heapRegionRemSet.hpp" |
| stefank@2314 | 30 | #include "oops/oop.inline.hpp" |
| stefank@2314 | 31 | |
| jmasa@3357 | 32 | inline uint G1RemSet::n_workers() { |
| ysr@777 | 33 | if (_g1->workers() != NULL) { |
| ysr@777 | 34 | return _g1->workers()->total_workers(); |
| ysr@777 | 35 | } else { |
| ysr@777 | 36 | return 1; |
| ysr@777 | 37 | } |
| ysr@777 | 38 | } |
| ysr@777 | 39 | |
| johnc@2216 | 40 | template <class T> |
| johnc@2302 | 41 | inline void G1RemSet::write_ref(HeapRegion* from, T* p) { |
| johnc@2302 | 42 | par_write_ref(from, p, 0); |
| ysr@777 | 43 | } |
| ysr@777 | 44 | |
| johnc@2216 | 45 | template <class T> |
| johnc@2302 | 46 | inline void G1RemSet::par_write_ref(HeapRegion* from, T* p, int tid) { |
| ysr@1280 | 47 | oop obj = oopDesc::load_decode_heap_oop(p); |
| ysr@777 | 48 | #ifdef ASSERT |
| ysr@777 | 49 | // can't do because of races |
| ysr@777 | 50 | // assert(obj == NULL || obj->is_oop(), "expected an oop"); |
| ysr@777 | 51 | |
| ysr@777 | 52 | // Do the safe subset of is_oop |
| ysr@777 | 53 | if (obj != NULL) { |
| ysr@777 | 54 | #ifdef CHECK_UNHANDLED_OOPS |
| ysr@777 | 55 | oopDesc* o = obj.obj(); |
| ysr@777 | 56 | #else |
| ysr@777 | 57 | oopDesc* o = obj; |
| ysr@777 | 58 | #endif // CHECK_UNHANDLED_OOPS |
| ysr@777 | 59 | assert((intptr_t)o % MinObjAlignmentInBytes == 0, "not oop aligned"); |
| ysr@777 | 60 | assert(Universe::heap()->is_in_reserved(obj), "must be in heap"); |
| ysr@777 | 61 | } |
| ysr@777 | 62 | #endif // ASSERT |
| johnc@2060 | 63 | |
| johnc@2060 | 64 | assert(from == NULL || from->is_in_reserved(p), "p is not in from"); |
| johnc@2060 | 65 | |
| ysr@777 | 66 | HeapRegion* to = _g1->heap_region_containing(obj); |
| johnc@2302 | 67 | if (to != NULL && from != to) { |
| johnc@2302 | 68 | assert(to->rem_set() != NULL, "Need per-region 'into' remsets."); |
| johnc@2302 | 69 | to->rem_set()->add_reference(p, tid); |
| ysr@777 | 70 | } |
| ysr@777 | 71 | } |
| apetrusenko@1061 | 72 | |
| johnc@2216 | 73 | template <class T> |
| johnc@2216 | 74 | inline void UpdateRSOopClosure::do_oop_work(T* p) { |
| apetrusenko@1061 | 75 | assert(_from != NULL, "from region must be non-NULL"); |
| apetrusenko@1061 | 76 | _rs->par_write_ref(_from, p, _worker_i); |
| apetrusenko@1061 | 77 | } |
| johnc@2060 | 78 | |
| johnc@2216 | 79 | template <class T> |
| johnc@2216 | 80 | inline void UpdateRSetImmediate::do_oop_work(T* p) { |
| johnc@2060 | 81 | assert(_from->is_in_reserved(p), "paranoia"); |
| johnc@2060 | 82 | T heap_oop = oopDesc::load_heap_oop(p); |
| johnc@2060 | 83 | if (!oopDesc::is_null(heap_oop) && !_from->is_survivor()) { |
| johnc@2060 | 84 | _g1_rem_set->par_write_ref(_from, p, 0); |
| johnc@2060 | 85 | } |
| johnc@2060 | 86 | } |
| johnc@2060 | 87 | |
| stefank@2314 | 88 | #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1REMSET_INLINE_HPP |
