Mercurial > hg > truffle
comparison src/share/vm/gc_implementation/parallelScavenge/psScavenge.inline.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | ba764ed4b6f2 |
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-1:000000000000 | 0:a61af66fc99e |
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1 /* | |
2 * Copyright 2002-2006 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 | |
26 inline void PSScavenge::save_to_space_top_before_gc() { | |
27 ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap(); | |
28 _to_space_top_before_gc = heap->young_gen()->to_space()->top(); | |
29 } | |
30 | |
31 inline bool PSScavenge::should_scavenge(oop p) { | |
32 return p == NULL ? false : PSScavenge::is_obj_in_young((HeapWord*) p); | |
33 } | |
34 | |
35 inline bool PSScavenge::should_scavenge(oop p, MutableSpace* to_space) { | |
36 if (should_scavenge(p)) { | |
37 // Skip objects copied to to_space since the scavenge started. | |
38 HeapWord* const addr = (HeapWord*) p; | |
39 return addr < to_space_top_before_gc() || addr >= to_space->end(); | |
40 } | |
41 return false; | |
42 } | |
43 | |
44 inline bool PSScavenge::should_scavenge(oop p, bool check_to_space) { | |
45 if (check_to_space) { | |
46 ParallelScavengeHeap* heap = (ParallelScavengeHeap*) Universe::heap(); | |
47 return should_scavenge(p, heap->young_gen()->to_space()); | |
48 } | |
49 return should_scavenge(p); | |
50 } | |
51 | |
52 // Attempt to "claim" oop at p via CAS, push the new obj if successful | |
53 // This version tests the oop* to make sure it is within the heap before | |
54 // attempting marking. | |
55 inline void PSScavenge::copy_and_push_safe_barrier(PSPromotionManager* pm, | |
56 oop* p) { | |
57 assert(should_scavenge(*p, true), "revisiting object?"); | |
58 | |
59 oop o = *p; | |
60 if (o->is_forwarded()) { | |
61 *p = o->forwardee(); | |
62 } else { | |
63 *p = pm->copy_to_survivor_space(o, pm->depth_first()); | |
64 } | |
65 | |
66 // We cannot mark without test, as some code passes us pointers | |
67 // that are outside the heap. | |
68 if ((!PSScavenge::is_obj_in_young((HeapWord*) p)) && | |
69 Universe::heap()->is_in_reserved(p)) { | |
70 o = *p; | |
71 if (PSScavenge::is_obj_in_young((HeapWord*) o)) { | |
72 card_table()->inline_write_ref_field_gc(p, o); | |
73 } | |
74 } | |
75 } |