Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/shared/isGCActiveMark.hpp @ 4836:d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
Summary: Remove the separate counting phase of concurrent marking by tracking the amount of marked bytes and the cards spanned by marked objects in marking task/worker thread local data structures, which are updated as individual objects are marked.
Reviewed-by: brutisso, tonyp
author | johnc |
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date | Thu, 12 Jan 2012 00:06:47 -0800 |
parents | f95d63e2154a |
children | db9981fd3124 |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_ISGCACTIVEMARK_HPP |
26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_ISGCACTIVEMARK_HPP | |
27 | |
28 #ifndef SERIALGC | |
29 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" | |
30 #endif | |
31 | |
0 | 32 // This class provides a method for block structured setting of the |
33 // _is_gc_active state without requiring accessors in CollectedHeap | |
34 | |
35 class IsGCActiveMark : public StackObj { | |
36 public: | |
37 IsGCActiveMark() { | |
38 CollectedHeap* heap = Universe::heap(); | |
39 assert(!heap->is_gc_active(), "Not reentrant"); | |
40 heap->_is_gc_active = true; | |
41 } | |
42 | |
43 ~IsGCActiveMark() { | |
44 CollectedHeap* heap = Universe::heap(); | |
45 assert(heap->is_gc_active(), "Sanity"); | |
46 heap->_is_gc_active = false; | |
47 } | |
48 }; | |
1972 | 49 |
50 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_ISGCACTIVEMARK_HPP |