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comparison src/share/vm/memory/barrierSet.hpp @ 6725:da91efe96a93

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6964458: Reimplement class meta-data storage to use native memory Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author coleenp
date Sat, 01 Sep 2012 13:25:18 -0400
parents d2a62e0f25eb
children 63a4eb8bcd23 3205e78d8193
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6724:36d1d483d5d6 6725:da91efe96a93
1 /* 1 /*
2 * Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 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 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
68 68
69 // These functions indicate whether a particular access of the given 69 // These functions indicate whether a particular access of the given
70 // kinds requires a barrier. 70 // kinds requires a barrier.
71 virtual bool read_ref_needs_barrier(void* field) = 0; 71 virtual bool read_ref_needs_barrier(void* field) = 0;
72 virtual bool read_prim_needs_barrier(HeapWord* field, size_t bytes) = 0; 72 virtual bool read_prim_needs_barrier(HeapWord* field, size_t bytes) = 0;
73 virtual bool write_ref_needs_barrier(void* field, oop new_val) = 0;
74 virtual bool write_prim_needs_barrier(HeapWord* field, size_t bytes, 73 virtual bool write_prim_needs_barrier(HeapWord* field, size_t bytes,
75 juint val1, juint val2) = 0; 74 juint val1, juint val2) = 0;
76 75
77 // The first four operations provide a direct implementation of the 76 // The first four operations provide a direct implementation of the
78 // barrier set. An interpreter loop, for example, could call these 77 // barrier set. An interpreter loop, for example, could call these