1 /*
2 * Copyright (c) 2001, 2014, 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_MEMORY_TENUREDGENERATION_HPP
26 #define SHARE_VM_MEMORY_TENUREDGENERATION_HPP
27
28 #include "gc_implementation/shared/cSpaceCounters.hpp"
29 #include "gc_implementation/shared/gcStats.hpp"
30 #include "gc_implementation/shared/generationCounters.hpp"
31 #include "memory/cardGeneration.hpp"
32 #include "utilities/macros.hpp"
33
34 // TenuredGeneration models the heap containing old (promoted/tenured) objects
35 // contained in a single contiguous space.
36 //
37 // Garbage collection is performed using mark-compact.
38
39 class TenuredGeneration: public CardGeneration {
40 friend class VMStructs;
41 // Abstractly, this is a subtype that gets access to protected fields.
42 friend class VM_PopulateDumpSharedSpace;
43
44 protected:
45 ContiguousSpace* _the_space; // Actual space holding objects
46
47 GenerationCounters* _gen_counters;
48 CSpaceCounters* _space_counters;
49
50 // Allocation failure
51 virtual bool expand(size_t bytes, size_t expand_bytes);
111 size_t word_size,
112 bool is_tlab);
113
114 virtual void compute_new_size();
115
116 // Performance Counter support
117 void update_counters();
118
119 virtual void record_spaces_top();
120
121 // Statistics
122
123 virtual void update_gc_stats(int level, bool full);
124
125 virtual bool promotion_attempt_is_safe(size_t max_promoted_in_bytes) const;
126
127 virtual void verify();
128 virtual void print_on(outputStream* st) const;
129 };
130
131 #endif // SHARE_VM_MEMORY_TENUREDGENERATION_HPP
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1 /*
2 * Copyright (c) 2001, 2015, 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_SERIAL_TENUREDGENERATION_HPP
26 #define SHARE_VM_GC_SERIAL_TENUREDGENERATION_HPP
27
28 #include "gc/serial/cSpaceCounters.hpp"
29 #include "gc/shared/cardGeneration.hpp"
30 #include "gc/shared/gcStats.hpp"
31 #include "gc/shared/generationCounters.hpp"
32 #include "utilities/macros.hpp"
33
34 // TenuredGeneration models the heap containing old (promoted/tenured) objects
35 // contained in a single contiguous space.
36 //
37 // Garbage collection is performed using mark-compact.
38
39 class TenuredGeneration: public CardGeneration {
40 friend class VMStructs;
41 // Abstractly, this is a subtype that gets access to protected fields.
42 friend class VM_PopulateDumpSharedSpace;
43
44 protected:
45 ContiguousSpace* _the_space; // Actual space holding objects
46
47 GenerationCounters* _gen_counters;
48 CSpaceCounters* _space_counters;
49
50 // Allocation failure
51 virtual bool expand(size_t bytes, size_t expand_bytes);
111 size_t word_size,
112 bool is_tlab);
113
114 virtual void compute_new_size();
115
116 // Performance Counter support
117 void update_counters();
118
119 virtual void record_spaces_top();
120
121 // Statistics
122
123 virtual void update_gc_stats(int level, bool full);
124
125 virtual bool promotion_attempt_is_safe(size_t max_promoted_in_bytes) const;
126
127 virtual void verify();
128 virtual void print_on(outputStream* st) const;
129 };
130
131 #endif // SHARE_VM_GC_SERIAL_TENUREDGENERATION_HPP
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