1 /*

     2  * Copyright (c) 2014, 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  */

    24 

    25 package sun.hotspot.code;

    26 

    27 import java.lang.management.ManagementFactory;

    28 import java.lang.management.MemoryPoolMXBean;

    29 import java.util.EnumSet;

    30 

    31 import sun.hotspot.WhiteBox;

    32 

    33 public enum BlobType {

    34     // Execution level 1 and 4 (non-profiled) nmethods (including native nmethods)

    35     MethodNonProfiled(0, "CodeHeap 'non-profiled nmethods'"),

    36     // Execution level 2 and 3 (profiled) nmethods

    37     MethodProfiled(1, "CodeHeap 'profiled nmethods'"),

    38     // Non-nmethods like Buffers, Adapters and Runtime Stubs

    39     NonNMethod(2, "CodeHeap 'non-nmethods'") {

    40         @Override

    41         public boolean allowTypeWhenOverflow(BlobType type) {

    42             return super.allowTypeWhenOverflow(type)

    43                     || type == BlobType.MethodNonProfiled;

    44         }

    45     },

    46     // All types (No code cache segmentation)

    47     All(3, "CodeCache");

    48 

    49     public final int id;

    50     private final String beanName;

    51 

    52     private BlobType(int id, String beanName) {

    53         this.id = id;

    54         this.beanName = beanName;

    55     }

    56 

    57     public MemoryPoolMXBean getMemoryPool() {

    58         for (MemoryPoolMXBean bean : ManagementFactory.getMemoryPoolMXBeans()) {

    59             String name = bean.getName();

    60             if (beanName.equals(name)) {

    61                 return bean;

    62             }

    63         }

    64         return null;

    65     }

    66 

    67     public boolean allowTypeWhenOverflow(BlobType type) {

    68         return type == this;

    69     }

    70 

    71     public static EnumSet<BlobType> getAvailable() {

    72         WhiteBox whiteBox = WhiteBox.getWhiteBox();

    73         if (!whiteBox.getBooleanVMFlag("SegmentedCodeCache")) {

    74             // only All for non segmented world

    75             return EnumSet.of(All);

    76         }

    77         if (System.getProperty("java.vm.info").startsWith("interpreted ")) {

    78             // only NonNMethod for -Xint

    79             return EnumSet.of(NonNMethod);

    80         }

    81 

    82         EnumSet<BlobType> result = EnumSet.complementOf(EnumSet.of(All));

    83         if (!whiteBox.getBooleanVMFlag("TieredCompilation")

    84                 || whiteBox.getIntxVMFlag("TieredStopAtLevel") <= 1) {

    85             // there is no MethodProfiled in non tiered world or pure C1

    86             result.remove(MethodProfiled);

    87         }

    88         return result;

    89     }

    90 }