jdk8-mips64-public/hotspot: src/share/vm/memory/classify.hpp@0bfd3fb24150

6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
Summary: Ensure a full GC that clears SoftReferences before throwing an out-of-memory
Reviewed-by: ysr, jcoomes

     1 /*

     2  * Copyright 2003-2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    25 typedef enum oop_type {

    26   unknown_type,

    27   instance_type,

    28   instanceRef_type,

    29   objArray_type,

    30   symbol_type,

    31   klass_type,

    32   instanceKlass_type,

    33   method_type,

    34   constMethod_type,

    35   methodData_type,

    36   constantPool_type,

    37   constantPoolCache_type,

    38   typeArray_type,

    39   compiledICHolder_type,

    40   number_object_types

    41 } object_type;

    44 // Classify objects by type and keep counts.

    45 // Print the count and space taken for each type.

    48 class ClassifyObjectClosure : public ObjectClosure {

    49 private:

    51   static const char* object_type_name[number_object_types];

    53   int total_object_count;

    54   size_t total_object_size;

    55   int object_count[number_object_types];

    56   size_t object_size[number_object_types];

    58 public:

    59   ClassifyObjectClosure() { reset(); }

    60   void reset();

    61   void do_object(oop obj);

    62   static object_type classify_object(oop obj, bool count);

    63   size_t print();

    64 };

    67 // Count objects using the alloc_count field in the object's klass

    68 // object.

    70 class ClassifyInstanceKlassClosure : public ClassifyObjectClosure {

    71 private:

    72   int total_instances;

    73 public:

    74   ClassifyInstanceKlassClosure() { reset(); }

    75   void reset();

    76   void print();

    77   void do_object(oop obj);

    78 };

    81 // Clear the alloc_count fields in all classes so that the count can be

    82 // restarted.

    84 class ClearAllocCountClosure : public ObjectClosure {

    85 public:

    86   void do_object(oop obj) {

    87     if (obj->is_klass()) {

    88       Klass* k = Klass::cast((klassOop)obj);

    89       k->set_alloc_count(0);

    90     }

    91   }

    92 };

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

src/share/vm/memory/classify.hpp@0bfd3fb24150

src/share/vm/memory/classify.hpp