1 /*
2 * Copyright (c) 2002, 2008, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 class GCTaskManager;
26 class GCTaskQueue;
27 class OopStack;
28 class ReferenceProcessor;
29 class ParallelScavengeHeap;
30 class PSIsAliveClosure;
31 class PSRefProcTaskExecutor;
32
33 class PSScavenge: AllStatic {
34 friend class PSIsAliveClosure;
35 friend class PSKeepAliveClosure;
36 friend class PSPromotionManager;
37
38 enum ScavengeSkippedCause {
39 not_skipped = 0,
40 to_space_not_empty,
41 promoted_too_large,
42 full_follows_scavenge
43 };
44
118
119 template <class T> static inline bool should_scavenge(T* p);
120
121 // These call should_scavenge() above and, if it returns true, also check that
122 // the object was not newly copied into to_space. The version with the bool
123 // argument is a convenience wrapper that fetches the to_space pointer from
124 // the heap and calls the other version (if the arg is true).
125 template <class T> static inline bool should_scavenge(T* p, MutableSpace* to_space);
126 template <class T> static inline bool should_scavenge(T* p, bool check_to_space);
127
128 template <class T> inline static void copy_and_push_safe_barrier(PSPromotionManager* pm, T* p);
129
130 // Is an object in the young generation
131 // This assumes that the HeapWord argument is in the heap,
132 // so it only checks one side of the complete predicate.
133 inline static bool is_obj_in_young(HeapWord* o) {
134 const bool result = (o >= _young_generation_boundary);
135 return result;
136 }
137 };
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1 /*
2 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSSCAVENGE_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSSCAVENGE_HPP
27
28 #include "gc_implementation/parallelScavenge/cardTableExtension.hpp"
29 #include "gc_implementation/parallelScavenge/psVirtualspace.hpp"
30 #include "gc_implementation/shared/collectorCounters.hpp"
31 #include "memory/allocation.hpp"
32 #include "oops/oop.hpp"
33 #include "utilities/stack.hpp"
34
35 class GCTaskManager;
36 class GCTaskQueue;
37 class OopStack;
38 class ReferenceProcessor;
39 class ParallelScavengeHeap;
40 class PSIsAliveClosure;
41 class PSRefProcTaskExecutor;
42
43 class PSScavenge: AllStatic {
44 friend class PSIsAliveClosure;
45 friend class PSKeepAliveClosure;
46 friend class PSPromotionManager;
47
48 enum ScavengeSkippedCause {
49 not_skipped = 0,
50 to_space_not_empty,
51 promoted_too_large,
52 full_follows_scavenge
53 };
54
128
129 template <class T> static inline bool should_scavenge(T* p);
130
131 // These call should_scavenge() above and, if it returns true, also check that
132 // the object was not newly copied into to_space. The version with the bool
133 // argument is a convenience wrapper that fetches the to_space pointer from
134 // the heap and calls the other version (if the arg is true).
135 template <class T> static inline bool should_scavenge(T* p, MutableSpace* to_space);
136 template <class T> static inline bool should_scavenge(T* p, bool check_to_space);
137
138 template <class T> inline static void copy_and_push_safe_barrier(PSPromotionManager* pm, T* p);
139
140 // Is an object in the young generation
141 // This assumes that the HeapWord argument is in the heap,
142 // so it only checks one side of the complete predicate.
143 inline static bool is_obj_in_young(HeapWord* o) {
144 const bool result = (o >= _young_generation_boundary);
145 return result;
146 }
147 };
148
149 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSSCAVENGE_HPP
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