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annotate src/share/vm/memory/compactPermGen.hpp @ 3772:6747fd0512e0

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7004681: G1: Extend marking verification to Full GCs Summary: Perform a heap verification after the first phase of G1's full GC using objects' mark words to determine liveness. The third parameter of the heap verification routines, which was used in G1 to determine which marking bitmap to use in liveness calculations, has been changed from a boolean to an enum with values defined for using the mark word, and the 'prev' and 'next' bitmaps. Reviewed-by: tonyp, ysr
author johnc
date Tue, 14 Jun 2011 11:01:10 -0700
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1 /*
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2 * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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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.
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22 *
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23 */
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24
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25 #ifndef SHARE_VM_MEMORY_COMPACTPERMGEN_HPP
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26 #define SHARE_VM_MEMORY_COMPACTPERMGEN_HPP
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27
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28 #include "memory/generation.hpp"
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29 #include "memory/permGen.hpp"
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30
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31 class ContigPermSpace;
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32 class CardTableModRefBS;
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33 class CompactingPermGenGen;
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34 class PermanentGenerationSpec;
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35
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36 // A PermGen implemented with a contiguous space.
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37 class CompactingPermGen: public PermGen {
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38 friend class VMStructs;
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39 protected:
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40 // The "generation" view.
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41 OneContigSpaceCardGeneration* _gen;
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42
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43 public:
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44 CompactingPermGen(ReservedSpace rs, ReservedSpace shared_rs,
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45 size_t initial_byte_size, GenRemSet* remset,
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46 PermanentGenerationSpec* perm_spec);
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47
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48 HeapWord* mem_allocate(size_t size);
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49
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50 void compute_new_size();
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51
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52 Generation* as_gen() const { return _gen; }
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53
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54 };
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55
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56 #endif // SHARE_VM_MEMORY_COMPACTPERMGEN_HPP