jdk8-mips64-public/hotspot: src/share/vm/memory/metadataFactory.hpp@2c6ef90f030a

8049421: G1 Class Unloading after completing a concurrent mark cycle
Reviewed-by: tschatzl, ehelin, brutisso, coleenp, roland, iveresov
Contributed-by: stefan.karlsson@oracle.com, mikael.gerdin@oracle.com

     1 /*

     2  * Copyright (c) 2010, 2013, 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_MEMORY_METADATAFACTORY_HPP

    26 #define SHARE_VM_MEMORY_METADATAFACTORY_HPP

    28 #include "classfile/classLoaderData.hpp"

    29 #include "utilities/array.hpp"

    30 #include "utilities/exceptions.hpp"

    31 #include "utilities/globalDefinitions.hpp"

    33 class MetadataFactory : AllStatic {

    34  public:

    35   template <typename T>

    36   static Array<T>* new_array(ClassLoaderData* loader_data, int length, TRAPS) {

    37     // The "true" argument is because all metadata arrays are read only when

    38     // dumped to the shared archive

    39     return new (loader_data, length, /*read_only*/true, THREAD) Array<T>(length);

    40   }

    42   template <typename T>

    43   static Array<T>* new_array(ClassLoaderData* loader_data, int length, T value, TRAPS) {

    44     Array<T>* array = new_array<T>(loader_data, length, CHECK_NULL);

    45     for (int i = 0; i < length; i++) {

    46       array->at_put(i, value);

    47     }

    48     return array;

    49   }

    51   template <typename T>

    52   static Array<T>* new_writeable_array(ClassLoaderData* loader_data, int length, TRAPS) {

    53     return new (loader_data, length, /*read_only*/false, THREAD) Array<T>(length);

    54   }

    56   template <typename T>

    57   static Array<T>* new_writeable_array(ClassLoaderData* loader_data, int length, T value, TRAPS) {

    58     Array<T>* array = new_writeable_array<T>(loader_data, length, CHECK_NULL);

    59     for (int i = 0; i < length; i++) {

    60       array->at_put(i, value);

    61     }

    62     return array;

    63   }

    65   template <typename T>

    66   static void free_array(ClassLoaderData* loader_data, Array<T>* data) {

    67     if (data != NULL) {

    68       assert(loader_data != NULL, "shouldn't pass null");

    69       assert(!data->is_shared(), "cannot deallocate array in shared spaces");

    70       int size = data->size();

    71       if (DumpSharedSpaces) {

    72         loader_data->ro_metaspace()->deallocate((MetaWord*)data, size, false);

    73       } else {

    74         loader_data->metaspace_non_null()->deallocate((MetaWord*)data, size, false);

    75       }

    76     }

    77   }

    79   // Deallocation method for metadata

    80   template <class T>

    81   static void free_metadata(ClassLoaderData* loader_data, T md) {

    82     if (md != NULL) {

    83       assert(loader_data != NULL, "shouldn't pass null");

    84       int size = md->size();

    85       // Call metadata's deallocate function which will call deallocate fields

    86       assert(!DumpSharedSpaces, "cannot deallocate metadata when dumping CDS archive");

    87       assert(!md->on_stack(), "can't deallocate things on stack");

    88       assert(!md->is_shared(), "cannot deallocate if in shared spaces");

    89       md->deallocate_contents(loader_data);

    90       loader_data->metaspace_non_null()->deallocate((MetaWord*)md, size, md->is_klass());

    91     }

    92   }

    93 };

    95 #endif // SHARE_VM_MEMORY_METADATAFACTORY_HPP

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

src/share/vm/memory/metadataFactory.hpp@2c6ef90f030a

src/share/vm/memory/metadataFactory.hpp