Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/oops/ReceiverTypeData.java @ 6725: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>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | 4bec1b1f7b33 |
| children |
| rev | line source |
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| 3939 | 1 /* |
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2 * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 3939 | 4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
| 3939 | 8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
| 3939 | 14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 3939 | 18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 3939 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.oops; | |
| 26 | |
| 27 import java.io.*; | |
| 28 import java.util.*; | |
| 29 import sun.jvm.hotspot.debugger.*; | |
| 30 import sun.jvm.hotspot.runtime.*; | |
| 31 import sun.jvm.hotspot.types.*; | |
| 32 import sun.jvm.hotspot.utilities.*; | |
| 33 | |
| 34 // ReceiverTypeData | |
| 35 // | |
| 36 // A ReceiverTypeData is used to access profiling information about a | |
| 37 // dynamic type check. It consists of a counter which counts the total times | |
| 38 // that the check is reached, and a series of (Klass, count) pairs | |
| 39 // which are used to store a type profile for the receiver of the check. | |
| 40 public class ReceiverTypeData extends CounterData { | |
| 41 static final int receiver0Offset = counterCellCount; | |
| 42 static final int count0Offset = receiver0Offset + 1; | |
| 43 static final int receiverTypeRowCellCount = (count0Offset + 1) - receiver0Offset; | |
| 44 | |
| 45 public ReceiverTypeData(DataLayout layout) { | |
| 46 super(layout); | |
| 47 //assert(layout.tag() == DataLayout.receiverTypeDataTag || | |
| 48 // layout.tag() == DataLayout.virtualCallDataTag, "wrong type"); | |
| 49 } | |
| 50 | |
| 51 boolean isReceivertypedata() { return true; } | |
| 52 | |
| 53 static int staticCellCount() { | |
| 54 return counterCellCount + MethodData.TypeProfileWidth * receiverTypeRowCellCount; | |
| 55 } | |
| 56 | |
| 57 public int cellCount() { | |
| 58 return staticCellCount(); | |
| 59 } | |
| 60 | |
| 61 // Direct accessors | |
| 62 public static int rowLimit() { | |
| 63 return MethodData.TypeProfileWidth; | |
| 64 } | |
| 65 public static int receiverCellIndex(int row) { | |
| 66 return receiver0Offset + row * receiverTypeRowCellCount; | |
| 67 } | |
| 68 public static int receiverCountCellIndex(int row) { | |
| 69 return count0Offset + row * receiverTypeRowCellCount; | |
| 70 } | |
| 71 | |
| 72 // Get the receiver at row. The 'unchecked' version is needed by parallel old | |
| 73 // gc; it does not assert the receiver is a klass. During compaction of the | |
| 74 // perm gen, the klass may already have moved, so the isKlass() predicate | |
| 75 // would fail. The 'normal' version should be used whenever possible. | |
| 76 Klass receiverUnchecked(int row) { | |
| 77 //assert(row < rowLimit(), "oob"); | |
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78 Address recv = addressAt(receiverCellIndex(row)); |
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79 return (Klass)Metadata.instantiateWrapperFor(recv); |
| 3939 | 80 } |
| 81 | |
| 82 public Klass receiver(int row) { | |
| 83 Klass recv = receiverUnchecked(row); | |
| 84 //assert(recv == NULL || ((oop)recv).isKlass(), "wrong type"); | |
| 85 return recv; | |
| 86 } | |
| 87 | |
| 88 public int receiverCount(int row) { | |
| 89 //assert(row < rowLimit(), "oob"); | |
| 90 return uintAt(receiverCountCellIndex(row)); | |
| 91 } | |
| 92 | |
| 93 // Code generation support | |
| 94 static int receiverOffset(int row) { | |
| 95 return cellOffset(receiverCellIndex(row)); | |
| 96 } | |
| 97 static int receiverCountOffset(int row) { | |
| 98 return cellOffset(receiverCountCellIndex(row)); | |
| 99 } | |
| 100 static int receiverTypeDataSize() { | |
| 101 return cellOffset(staticCellCount()); | |
| 102 } | |
| 103 | |
| 104 void printReceiverDataOn(PrintStream st) { | |
| 105 int row; | |
| 106 int entries = 0; | |
| 107 for (row = 0; row < rowLimit(); row++) { | |
| 108 if (receiver(row) != null) entries++; | |
| 109 } | |
| 110 st.println("count(" + count() + ") entries(" + entries + ")"); | |
| 111 for (row = 0; row < rowLimit(); row++) { | |
| 112 if (receiver(row) != null) { | |
| 113 tab(st); | |
| 114 receiver(row).printValueOn(st); | |
| 115 st.println("(" + receiverCount(row) + ")"); | |
| 116 } | |
| 117 } | |
| 118 } | |
| 119 public void printDataOn(PrintStream st) { | |
| 120 printShared(st, "ReceiverTypeData"); | |
| 121 printReceiverDataOn(st); | |
| 122 } | |
| 123 } |