Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/memory/MemRegion.java @ 1913:3b2dea75431e
6984311: JSR 292 needs optional bootstrap method parameters
Summary: Allow CONSTANT_InvokeDynamic nodes to have any number of extra operands.
Reviewed-by: twisti
| author | jrose |
|---|---|
| date | Sat, 30 Oct 2010 13:08:23 -0700 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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2 * Copyright (c) 2000, 2001, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.memory; | |
| 26 | |
| 27 import java.util.*; | |
| 28 | |
| 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 /** A very simple data structure representing a contigous region of | |
| 35 address space. */ | |
| 36 | |
| 37 public class MemRegion implements Cloneable { | |
| 38 private Address start; | |
| 39 private long byteSize; | |
| 40 | |
| 41 private static AddressField startField; | |
| 42 private static CIntegerField wordSizeField; | |
| 43 | |
| 44 static { | |
| 45 VM.registerVMInitializedObserver(new Observer() { | |
| 46 public void update(Observable o, Object data) { | |
| 47 initialize(VM.getVM().getTypeDataBase()); | |
| 48 } | |
| 49 }); | |
| 50 } | |
| 51 | |
| 52 private static synchronized void initialize(TypeDataBase db) { | |
| 53 Type type = db.lookupType("MemRegion"); | |
| 54 | |
| 55 startField = type.getAddressField("_start"); | |
| 56 wordSizeField = type.getCIntegerField("_word_size"); | |
| 57 } | |
| 58 | |
| 59 public MemRegion() { | |
| 60 } | |
| 61 | |
| 62 /** This constructor takes a "MemRegion*" in the target process */ | |
| 63 public MemRegion(Address memRegionAddr) { | |
| 64 this(startField.getValue(memRegionAddr), | |
| 65 wordSizeField.getValue(memRegionAddr)); | |
| 66 } | |
| 67 | |
| 68 public MemRegion(Address start, long wordSize) { | |
| 69 setStart(start); | |
| 70 setWordSize(wordSize); | |
| 71 } | |
| 72 | |
| 73 public MemRegion(Address start, Address limit) { | |
| 74 setStart(start); | |
| 75 byteSize = limit.minus(start); | |
| 76 } | |
| 77 | |
| 78 public Object clone() { | |
| 79 return new MemRegion(start, byteSize); | |
| 80 } | |
| 81 | |
| 82 public MemRegion copy() { | |
| 83 return (MemRegion) clone(); | |
| 84 } | |
| 85 | |
| 86 public MemRegion intersection(MemRegion mr2) { | |
| 87 MemRegion res = new MemRegion(); | |
| 88 if (AddressOps.gt(mr2.start(), start())) { | |
| 89 res.setStart(mr2.start()); | |
| 90 } else { | |
| 91 res.setStart(start()); | |
| 92 } | |
| 93 Address resEnd; | |
| 94 Address end = end(); | |
| 95 Address mr2End = mr2.end(); | |
| 96 if (AddressOps.lt(end, mr2End)) { | |
| 97 resEnd = end; | |
| 98 } else { | |
| 99 resEnd = mr2End; | |
| 100 } | |
| 101 if (AddressOps.lt(resEnd, res.start())) { | |
| 102 res.setStart(null); | |
| 103 res.setWordSize(0); | |
| 104 } else { | |
| 105 res.setEnd(resEnd); | |
| 106 } | |
| 107 return res; | |
| 108 } | |
| 109 | |
| 110 public MemRegion union(MemRegion mr2) { | |
| 111 MemRegion res = new MemRegion(); | |
| 112 if (AddressOps.lt(mr2.start(), start())) { | |
| 113 res.setStart(mr2.start()); | |
| 114 } else { | |
| 115 res.setStart(start()); | |
| 116 } | |
| 117 Address resEnd; | |
| 118 Address end = end(); | |
| 119 Address mr2End = mr2.end(); | |
| 120 if (AddressOps.gt(end, mr2End)) { | |
| 121 resEnd = end; | |
| 122 } else { | |
| 123 resEnd = mr2End; | |
| 124 } | |
| 125 res.setEnd(resEnd); | |
| 126 return res; | |
| 127 } | |
| 128 | |
| 129 public Address start() { | |
| 130 return start; | |
| 131 } | |
| 132 | |
| 133 public OopHandle startAsOopHandle() { | |
| 134 return start().addOffsetToAsOopHandle(0); | |
| 135 } | |
| 136 | |
| 137 public Address end() { | |
| 138 return start.addOffsetTo(byteSize); | |
| 139 } | |
| 140 | |
| 141 public OopHandle endAsOopHandle() { | |
| 142 return end().addOffsetToAsOopHandle(0); | |
| 143 } | |
| 144 | |
| 145 public void setStart(Address start) { | |
| 146 this.start = start; | |
| 147 } | |
| 148 | |
| 149 public void setEnd(Address end) { | |
| 150 byteSize = end.minus(start); | |
| 151 } | |
| 152 | |
| 153 public void setWordSize(long wordSize) { | |
| 154 byteSize = VM.getVM().getAddressSize() * wordSize; | |
| 155 } | |
| 156 | |
| 157 public boolean contains(MemRegion mr2) { | |
| 158 return AddressOps.lte(start, mr2.start) && AddressOps.gte(end(), mr2.end()); | |
| 159 } | |
| 160 | |
| 161 public boolean contains(Address addr) { | |
| 162 return AddressOps.gte(addr, start()) && AddressOps.lt(addr, end()); | |
| 163 } | |
| 164 | |
| 165 public long byteSize() { | |
| 166 return byteSize; | |
| 167 } | |
| 168 | |
| 169 public long wordSize() { | |
| 170 return byteSize / VM.getVM().getAddressSize(); | |
| 171 } | |
| 172 } |