annotate src/share/vm/oops/instanceClassLoaderKlass.hpp @ 3602:da91efe96a93

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
children aed758eda82a
rev   line source
coleenp@3602 1 /*
coleenp@3602 2 * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
coleenp@3602 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
coleenp@3602 4 *
coleenp@3602 5 * This code is free software; you can redistribute it and/or modify it
coleenp@3602 6 * under the terms of the GNU General Public License version 2 only, as
coleenp@3602 7 * published by the Free Software Foundation.
coleenp@3602 8 *
coleenp@3602 9 * This code is distributed in the hope that it will be useful, but WITHOUT
coleenp@3602 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
coleenp@3602 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
coleenp@3602 12 * version 2 for more details (a copy is included in the LICENSE file that
coleenp@3602 13 * accompanied this code).
coleenp@3602 14 *
coleenp@3602 15 * You should have received a copy of the GNU General Public License version
coleenp@3602 16 * 2 along with this work; if not, write to the Free Software Foundation,
coleenp@3602 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
coleenp@3602 18 *
coleenp@3602 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
coleenp@3602 20 * or visit www.oracle.com if you need additional information or have any
coleenp@3602 21 * questions.
coleenp@3602 22 *
coleenp@3602 23 */
coleenp@3602 24
coleenp@3602 25 #ifndef SHARE_VM_OOPS_INSTANCECLASSLOADERKLASS_HPP
coleenp@3602 26 #define SHARE_VM_OOPS_INSTANCECLASSLOADERKLASS_HPP
coleenp@3602 27
coleenp@3602 28 #include "oops/instanceKlass.hpp"
coleenp@3602 29
coleenp@3602 30 // An instanceClassLoaderKlass is a specialization of the InstanceKlass. It does
coleenp@3602 31 // not add any field. It is added to walk the dependencies for the class loader
coleenp@3602 32 // key that this class loader points to. This is how the loader_data graph is
coleenp@3602 33 // walked and dependant class loaders are kept alive. I thought we walked
coleenp@3602 34 // the list later?
coleenp@3602 35
coleenp@3602 36 class instanceClassLoaderKlass: public InstanceKlass {
coleenp@3602 37 friend class VMStructs;
coleenp@3602 38 friend class InstanceKlass;
coleenp@3602 39
coleenp@3602 40 // Constructor
coleenp@3602 41 instanceClassLoaderKlass(int vtable_len, int itable_len, int static_field_size, int nonstatic_oop_map_size, ReferenceType rt, AccessFlags access_flags, bool is_anonymous)
coleenp@3602 42 : InstanceKlass(vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, access_flags, is_anonymous) {}
coleenp@3602 43
coleenp@3602 44 public:
coleenp@3602 45 virtual bool oop_is_instanceClassLoader() const { return true; }
coleenp@3602 46
coleenp@3602 47 instanceClassLoaderKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); }
coleenp@3602 48
coleenp@3602 49 // Iterators
coleenp@3602 50 int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) {
coleenp@3602 51 return oop_oop_iterate_v(obj, blk);
coleenp@3602 52 }
coleenp@3602 53 int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) {
coleenp@3602 54 return oop_oop_iterate_v_m(obj, blk, mr);
coleenp@3602 55 }
coleenp@3602 56
coleenp@3602 57 #define InstanceClassLoaderKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \
coleenp@3602 58 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \
coleenp@3602 59 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, MemRegion mr);
coleenp@3602 60
coleenp@3602 61 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceClassLoaderKlass_OOP_OOP_ITERATE_DECL)
coleenp@3602 62 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceClassLoaderKlass_OOP_OOP_ITERATE_DECL)
coleenp@3602 63
coleenp@3602 64 #ifndef SERIALGC
coleenp@3602 65 #define InstanceClassLoaderKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \
coleenp@3602 66 int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk);
coleenp@3602 67
coleenp@3602 68 ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceClassLoaderKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
coleenp@3602 69 ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceClassLoaderKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
coleenp@3602 70 #endif // !SERIALGC
coleenp@3602 71
coleenp@3602 72 // Garbage collection
coleenp@3602 73 void oop_follow_contents(oop obj);
coleenp@3602 74
coleenp@3602 75 // Parallel Scavenge and Parallel Old
coleenp@3602 76 PARALLEL_GC_DECLS
coleenp@3602 77 };
coleenp@3602 78
coleenp@3602 79 #endif // SHARE_VM_OOPS_INSTANCECLASSLOADERKLASS_HPP