Mercurial > hg > truffle
comparison src/share/vm/gc_implementation/g1/g1RemSet.inline.hpp @ 342:37f87013dfd8
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
author | ysr |
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date | Thu, 05 Jun 2008 15:57:56 -0700 |
parents | |
children | 4f360ec815ba |
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189:0b27f3512f9e | 342:37f87013dfd8 |
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1 /* | |
2 * Copyright 2001-2007 Sun Microsystems, Inc. All Rights Reserved. | |
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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 inline size_t G1RemSet::n_workers() { | |
26 if (_g1->workers() != NULL) { | |
27 return _g1->workers()->total_workers(); | |
28 } else { | |
29 return 1; | |
30 } | |
31 } | |
32 | |
33 inline void HRInto_G1RemSet::write_ref_nv(HeapRegion* from, oop* p) { | |
34 oop obj = *p; | |
35 assert(from != NULL && from->is_in_reserved(p), | |
36 "p is not in a from"); | |
37 HeapRegion* to = _g1->heap_region_containing(obj); | |
38 if (from != to && to != NULL) { | |
39 if (!to->popular() && !from->is_survivor()) { | |
40 #if G1_REM_SET_LOGGING | |
41 gclog_or_tty->print_cr("Adding " PTR_FORMAT " (" PTR_FORMAT ") to RS" | |
42 " for region [" PTR_FORMAT ", " PTR_FORMAT ")", | |
43 p, obj, | |
44 to->bottom(), to->end()); | |
45 #endif | |
46 assert(to->rem_set() != NULL, "Need per-region 'into' remsets."); | |
47 if (to->rem_set()->add_reference(p)) { | |
48 _g1->schedule_popular_region_evac(to); | |
49 } | |
50 } | |
51 } | |
52 } | |
53 | |
54 inline void HRInto_G1RemSet::write_ref(HeapRegion* from, oop* p) { | |
55 write_ref_nv(from, p); | |
56 } | |
57 | |
58 inline bool HRInto_G1RemSet::self_forwarded(oop obj) { | |
59 bool result = (obj->is_forwarded() && (obj->forwardee()== obj)); | |
60 return result; | |
61 } | |
62 | |
63 inline void HRInto_G1RemSet::par_write_ref(HeapRegion* from, oop* p, int tid) { | |
64 oop obj = *p; | |
65 #ifdef ASSERT | |
66 // can't do because of races | |
67 // assert(obj == NULL || obj->is_oop(), "expected an oop"); | |
68 | |
69 // Do the safe subset of is_oop | |
70 if (obj != NULL) { | |
71 #ifdef CHECK_UNHANDLED_OOPS | |
72 oopDesc* o = obj.obj(); | |
73 #else | |
74 oopDesc* o = obj; | |
75 #endif // CHECK_UNHANDLED_OOPS | |
76 assert((intptr_t)o % MinObjAlignmentInBytes == 0, "not oop aligned"); | |
77 assert(Universe::heap()->is_in_reserved(obj), "must be in heap"); | |
78 } | |
79 #endif // ASSERT | |
80 assert(from == NULL || from->is_in_reserved(p), | |
81 "p is not in from"); | |
82 HeapRegion* to = _g1->heap_region_containing(obj); | |
83 // The test below could be optimized by applying a bit op to to and from. | |
84 if (to != NULL && from != NULL && from != to) { | |
85 if (!to->popular() && !from->is_survivor()) { | |
86 #if G1_REM_SET_LOGGING | |
87 gclog_or_tty->print_cr("Adding " PTR_FORMAT " (" PTR_FORMAT ") to RS" | |
88 " for region [" PTR_FORMAT ", " PTR_FORMAT ")", | |
89 p, obj, | |
90 to->bottom(), to->end()); | |
91 #endif | |
92 assert(to->rem_set() != NULL, "Need per-region 'into' remsets."); | |
93 if (to->rem_set()->add_reference(p, tid)) { | |
94 _g1->schedule_popular_region_evac(to); | |
95 } | |
96 } | |
97 // There is a tricky infinite loop if we keep pushing | |
98 // self forwarding pointers onto our _new_refs list. | |
99 if (_par_traversal_in_progress && | |
100 to->in_collection_set() && !self_forwarded(obj)) { | |
101 _new_refs[tid]->push(p); | |
102 } | |
103 } | |
104 } |