jdk8-mips64-public/hotspot: src/share/vm/oops/instanceRefKlass.hpp@db9981fd3124

8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
Summary: Rename INCLUDE_ALTERNATE_GCS to INCLUDE_ALL_GCS and replace SERIALGC with INCLUDE_ALL_GCS.
Reviewed-by: coleenp, stefank

     1 /*

     2  * Copyright (c) 1997, 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

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    23  */

    25 #ifndef SHARE_VM_OOPS_INSTANCEREFKLASS_HPP

    26 #define SHARE_VM_OOPS_INSTANCEREFKLASS_HPP

    28 #include "oops/instanceKlass.hpp"

    29 #include "utilities/macros.hpp"

    31 // An InstanceRefKlass is a specialized InstanceKlass for Java

    32 // classes that are subclasses of java/lang/ref/Reference.

    33 //

    34 // These classes are used to implement soft/weak/final/phantom

    35 // references and finalization, and need special treatment by the

    36 // garbage collector.

    37 //

    38 // During GC discovered reference objects are added (chained) to one

    39 // of the four lists below, depending on the type of reference.

    40 // The linked occurs through the next field in class java/lang/ref/Reference.

    41 //

    42 // Afterwards, the discovered references are processed in decreasing

    43 // order of reachability. Reference objects eligible for notification

    44 // are linked to the static pending_list in class java/lang/ref/Reference,

    45 // and the pending list lock object in the same class is notified.

    48 class InstanceRefKlass: public InstanceKlass {

    49   friend class InstanceKlass;

    51   // Constructor

    52   InstanceRefKlass(int vtable_len, int itable_len, int static_field_size, int nonstatic_oop_map_size, ReferenceType rt, AccessFlags access_flags, bool is_anonymous)

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

    55  public:

    56   InstanceRefKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); }

    57   // Type testing

    58   bool oop_is_instanceRef() const             { return true; }

    60   // Casting from Klass*

    61   static InstanceRefKlass* cast(Klass* k) {

    62     assert(k->oop_is_instanceRef(), "cast to InstanceRefKlass");

    63     return (InstanceRefKlass*) k;

    64   }

    66   // Garbage collection

    67   int  oop_adjust_pointers(oop obj);

    68   void oop_follow_contents(oop obj);

    70   // Parallel Scavenge and Parallel Old

    71   PARALLEL_GC_DECLS

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

    74     return oop_oop_iterate_v(obj, blk);

    75   }

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

    77     return oop_oop_iterate_v_m(obj, blk, mr);

    78   }

    80 #define InstanceRefKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix)                \

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

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

    84   ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceRefKlass_OOP_OOP_ITERATE_DECL)

    85   ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceRefKlass_OOP_OOP_ITERATE_DECL)

    87 #if INCLUDE_ALL_GCS

    88 #define InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix)      \

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

    91   ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)

    92   ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)

    93 #endif // INCLUDE_ALL_GCS

    95   static void release_and_notify_pending_list_lock(BasicLock *pending_list_basic_lock);

    96   static void acquire_pending_list_lock(BasicLock *pending_list_basic_lock);

    97   static bool owns_pending_list_lock(JavaThread* thread);

    99   // Update non-static oop maps so 'referent', 'nextPending' and

   100   // 'discovered' will look like non-oops

   101   static void update_nonstatic_oop_maps(Klass* k);

   103  public:

   104   // Verification

   105   void oop_verify_on(oop obj, outputStream* st);

   106 };

   108 #endif // SHARE_VM_OOPS_INSTANCEREFKLASS_HPP

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

src/share/vm/oops/instanceRefKlass.hpp@db9981fd3124

src/share/vm/oops/instanceRefKlass.hpp