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src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp@37f87013dfd8 (annotated)
src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp
Thu, 05 Jun 2008 15:57:56 -0700
- author
- ysr
- date
- Thu, 05 Jun 2008 15:57:56 -0700
- changeset 777
- 37f87013dfd8
- child 1051
- 4f360ec815ba
- permissions
- -rw-r--r--
6711316: Open source the Garbage-First garbage collector
Summary: First mercurial integration of the code for the Garbage-First garbage collector.
Reviewed-by: apetrusenko, iveresov, jmasa, sgoldman, tonyp, ysr
| ysr@777 | 1 | /* |
| ysr@777 | 2 | * Copyright 2001-2007 Sun Microsystems, Inc. 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 | * |
| ysr@777 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| ysr@777 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| ysr@777 | 21 | * have any questions. |
| ysr@777 | 22 | * |
| ysr@777 | 23 | */ |
| ysr@777 | 24 | |
| ysr@777 | 25 | inline size_t G1RemSet::n_workers() { |
| ysr@777 | 26 | if (_g1->workers() != NULL) { |
| ysr@777 | 27 | return _g1->workers()->total_workers(); |
| ysr@777 | 28 | } else { |
| ysr@777 | 29 | return 1; |
| ysr@777 | 30 | } |
| ysr@777 | 31 | } |
| ysr@777 | 32 | |
| ysr@777 | 33 | inline void HRInto_G1RemSet::write_ref_nv(HeapRegion* from, oop* p) { |
| ysr@777 | 34 | oop obj = *p; |
| ysr@777 | 35 | assert(from != NULL && from->is_in_reserved(p), |
| ysr@777 | 36 | "p is not in a from"); |
| ysr@777 | 37 | HeapRegion* to = _g1->heap_region_containing(obj); |
| ysr@777 | 38 | if (from != to && to != NULL) { |
| ysr@777 | 39 | if (!to->popular() && !from->is_survivor()) { |
| ysr@777 | 40 | #if G1_REM_SET_LOGGING |
| ysr@777 | 41 | gclog_or_tty->print_cr("Adding " PTR_FORMAT " (" PTR_FORMAT ") to RS" |
| ysr@777 | 42 | " for region [" PTR_FORMAT ", " PTR_FORMAT ")", |
| ysr@777 | 43 | p, obj, |
| ysr@777 | 44 | to->bottom(), to->end()); |
| ysr@777 | 45 | #endif |
| ysr@777 | 46 | assert(to->rem_set() != NULL, "Need per-region 'into' remsets."); |
| ysr@777 | 47 | if (to->rem_set()->add_reference(p)) { |
| ysr@777 | 48 | _g1->schedule_popular_region_evac(to); |
| ysr@777 | 49 | } |
| ysr@777 | 50 | } |
| ysr@777 | 51 | } |
| ysr@777 | 52 | } |
| ysr@777 | 53 | |
| ysr@777 | 54 | inline void HRInto_G1RemSet::write_ref(HeapRegion* from, oop* p) { |
| ysr@777 | 55 | write_ref_nv(from, p); |
| ysr@777 | 56 | } |
| ysr@777 | 57 | |
| ysr@777 | 58 | inline bool HRInto_G1RemSet::self_forwarded(oop obj) { |
| ysr@777 | 59 | bool result = (obj->is_forwarded() && (obj->forwardee()== obj)); |
| ysr@777 | 60 | return result; |
| ysr@777 | 61 | } |
| ysr@777 | 62 | |
| ysr@777 | 63 | inline void HRInto_G1RemSet::par_write_ref(HeapRegion* from, oop* p, int tid) { |
| ysr@777 | 64 | oop obj = *p; |
| ysr@777 | 65 | #ifdef ASSERT |
| ysr@777 | 66 | // can't do because of races |
| ysr@777 | 67 | // assert(obj == NULL || obj->is_oop(), "expected an oop"); |
| ysr@777 | 68 | |
| ysr@777 | 69 | // Do the safe subset of is_oop |
| ysr@777 | 70 | if (obj != NULL) { |
| ysr@777 | 71 | #ifdef CHECK_UNHANDLED_OOPS |
| ysr@777 | 72 | oopDesc* o = obj.obj(); |
| ysr@777 | 73 | #else |
| ysr@777 | 74 | oopDesc* o = obj; |
| ysr@777 | 75 | #endif // CHECK_UNHANDLED_OOPS |
| ysr@777 | 76 | assert((intptr_t)o % MinObjAlignmentInBytes == 0, "not oop aligned"); |
| ysr@777 | 77 | assert(Universe::heap()->is_in_reserved(obj), "must be in heap"); |
| ysr@777 | 78 | } |
| ysr@777 | 79 | #endif // ASSERT |
| ysr@777 | 80 | assert(from == NULL || from->is_in_reserved(p), |
| ysr@777 | 81 | "p is not in from"); |
| ysr@777 | 82 | HeapRegion* to = _g1->heap_region_containing(obj); |
| ysr@777 | 83 | // The test below could be optimized by applying a bit op to to and from. |
| ysr@777 | 84 | if (to != NULL && from != NULL && from != to) { |
| ysr@777 | 85 | if (!to->popular() && !from->is_survivor()) { |
| ysr@777 | 86 | #if G1_REM_SET_LOGGING |
| ysr@777 | 87 | gclog_or_tty->print_cr("Adding " PTR_FORMAT " (" PTR_FORMAT ") to RS" |
| ysr@777 | 88 | " for region [" PTR_FORMAT ", " PTR_FORMAT ")", |
| ysr@777 | 89 | p, obj, |
| ysr@777 | 90 | to->bottom(), to->end()); |
| ysr@777 | 91 | #endif |
| ysr@777 | 92 | assert(to->rem_set() != NULL, "Need per-region 'into' remsets."); |
| ysr@777 | 93 | if (to->rem_set()->add_reference(p, tid)) { |
| ysr@777 | 94 | _g1->schedule_popular_region_evac(to); |
| ysr@777 | 95 | } |
| ysr@777 | 96 | } |
| ysr@777 | 97 | // There is a tricky infinite loop if we keep pushing |
| ysr@777 | 98 | // self forwarding pointers onto our _new_refs list. |
| ysr@777 | 99 | if (_par_traversal_in_progress && |
| ysr@777 | 100 | to->in_collection_set() && !self_forwarded(obj)) { |
| ysr@777 | 101 | _new_refs[tid]->push(p); |
| ysr@777 | 102 | } |
| ysr@777 | 103 | } |
| ysr@777 | 104 | } |
