jdk8-mips64-public/hotspot: src/share/vm/oops/instanceClassLoaderKlass.hpp@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>

     1 /*

     2  * Copyright (c) 2011, 2012, 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  */

    25 #ifndef SHARE_VM_OOPS_INSTANCECLASSLOADERKLASS_HPP

    26 #define SHARE_VM_OOPS_INSTANCECLASSLOADERKLASS_HPP

    28 #include "oops/instanceKlass.hpp"

    30 // An instanceClassLoaderKlass is a specialization of the InstanceKlass. It does

    31 // not add any field.  It is added to walk the dependencies for the class loader

    32 // key that this class loader points to.  This is how the loader_data graph is

    33 // walked and dependant class loaders are kept alive.  I thought we walked

    34 // the list later?

    36 class instanceClassLoaderKlass: public InstanceKlass {

    37   friend class VMStructs;

    38   friend class InstanceKlass;

    40   // Constructor

    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)

    42     : InstanceKlass(vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, access_flags, is_anonymous) {}

    44 public:

    45   virtual bool oop_is_instanceClassLoader() const { return true; }

    47   instanceClassLoaderKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); }

    49   // Iterators

    50   int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) {

    51     return oop_oop_iterate_v(obj, blk);

    52   }

    53   int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) {

    54     return oop_oop_iterate_v_m(obj, blk, mr);

    55   }

    57 #define InstanceClassLoaderKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix)                \

    58   int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk);                         \

    59   int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, MemRegion mr);

    61   ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceClassLoaderKlass_OOP_OOP_ITERATE_DECL)

    62   ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceClassLoaderKlass_OOP_OOP_ITERATE_DECL)

    64 #ifndef SERIALGC

    65 #define InstanceClassLoaderKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix)      \

    66   int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk);

    68   ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceClassLoaderKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)

    69   ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceClassLoaderKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)

    70 #endif // !SERIALGC

    72     // Garbage collection

    73   void oop_follow_contents(oop obj);

    75   // Parallel Scavenge and Parallel Old

    76   PARALLEL_GC_DECLS

    77 };

    79 #endif // SHARE_VM_OOPS_INSTANCECLASSLOADERKLASS_HPP

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/oops/instanceClassLoaderKlass.hpp@da91efe96a93

src/share/vm/oops/instanceClassLoaderKlass.hpp