Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/runtime/RegisterMap.java @ 12226:7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
Reviewed-by: coleenp, mgerdin, hseigel
| author | ehelin |
|---|---|
| date | Mon, 12 Aug 2013 17:37:02 +0200 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2000, 2006, 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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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.runtime; | |
| 26 | |
| 27 import java.io.*; | |
| 28 import java.util.*; | |
| 29 | |
| 30 import sun.jvm.hotspot.debugger.*; | |
| 31 import sun.jvm.hotspot.interpreter.*; | |
| 32 import sun.jvm.hotspot.code.*; | |
| 33 import sun.jvm.hotspot.types.*; | |
| 34 import sun.jvm.hotspot.utilities.*; | |
| 35 | |
| 36 /** <P> A companion structure used for stack traversal. The | |
| 37 RegisterMap contains misc. information needed in order to do | |
| 38 correct stack traversal of stack frames. Hence, it must always be | |
| 39 passed in as an argument to Frame.sender(RegisterMap). </P> | |
| 40 | |
| 41 <P> The use of RegisterMaps is slightly different in the | |
| 42 Serviceability Agent APIs than in the VM itself. In the VM, a | |
| 43 RegisterMap is created either for a particular thread or cloned | |
| 44 from another RegisterMap. In these APIs, a JavaThread is the | |
| 45 top-level factory for RegisterMaps, and RegisterMaps know how to | |
| 46 copy themselves (through either the clone() or copy() | |
| 47 methods). </P> */ | |
| 48 | |
| 49 public abstract class RegisterMap implements Cloneable { | |
| 50 /** Location of registers */ | |
| 51 protected Address[] location; | |
| 52 // FIXME: don't know about LocationValidType | |
| 53 protected long[] locationValid; | |
| 54 /** Should include argument_oop marked locations for compiler */ | |
| 55 protected boolean includeArgumentOops; | |
| 56 /** Reference to current thread */ | |
| 57 protected JavaThread thread; | |
| 58 /** Tells if the register map needs to be updated when traversing the stack */ | |
| 59 protected boolean updateMap; | |
| 60 /** Location of a frame where the pc is not at a call (NULL if no frame exists) */ | |
| 61 protected static int regCount; | |
| 62 protected static int locationValidTypeSize; | |
| 63 protected static int locationValidSize; | |
| 64 | |
| 65 static { | |
| 66 VM.registerVMInitializedObserver(new Observer() { | |
| 67 public void update(Observable o, Object data) { | |
| 68 initialize(VM.getVM().getTypeDataBase()); | |
| 69 } | |
| 70 }); | |
| 71 } | |
| 72 | |
| 73 private static void initialize(TypeDataBase db) { | |
| 74 regCount = db.lookupIntConstant("ConcreteRegisterImpl::number_of_registers").intValue(); | |
| 75 // FIXME: don't know about LocationValidType. The LocationValidType is typedef'ed as julong | |
| 76 // so used julong to get the size of LocationValidType. | |
| 77 locationValidTypeSize = (int)db.lookupType("julong").getSize() * 8; | |
| 78 locationValidSize = (regCount + locationValidTypeSize - 1) / locationValidTypeSize; | |
| 79 } | |
| 80 | |
| 81 protected RegisterMap(JavaThread thread, boolean updateMap) { | |
| 82 this.thread = thread; | |
| 83 this.updateMap = updateMap; | |
| 84 location = new Address[regCount]; | |
| 85 locationValid = new long[locationValidSize]; | |
| 86 clear(); | |
| 87 } | |
| 88 | |
| 89 /** Makes a copy of map into this */ | |
| 90 protected RegisterMap(RegisterMap map) { | |
| 91 if (Assert.ASSERTS_ENABLED) { | |
| 92 Assert.that(map != null, "RegisterMap must be present"); | |
| 93 } | |
| 94 this.thread = map.getThread(); | |
| 95 this.updateMap = map.getUpdateMap(); | |
| 96 this.includeArgumentOops = map.getIncludeArgumentOops(); | |
| 97 location = new Address[map.location.length]; | |
| 98 locationValid = new long[map.locationValid.length]; | |
| 99 initializeFromPD(map); | |
| 100 if (updateMap) { | |
| 101 for (int i = 0; i < locationValidSize; i++) { | |
| 102 long bits = (!getUpdateMap()) ? 0 : map.locationValid[i]; | |
| 103 locationValid[i] = bits; | |
| 104 // for whichever bits are set, pull in the corresponding map->_location | |
| 105 int j = i*locationValidTypeSize; | |
| 106 while (bits != 0) { | |
| 107 if ((bits & 1) != 0) { | |
| 108 if (Assert.ASSERTS_ENABLED) { | |
| 109 Assert.that(0 <= j && j < regCount, "range check"); | |
| 110 } | |
| 111 location[j] = map.location[j]; | |
| 112 } | |
| 113 bits >>>= 1; | |
| 114 j += 1; | |
| 115 } | |
| 116 } | |
| 117 } | |
| 118 } | |
| 119 | |
| 120 public abstract Object clone(); | |
| 121 | |
| 122 public RegisterMap copy() { | |
| 123 return (RegisterMap) clone(); | |
| 124 } | |
| 125 | |
| 126 public void clear() { | |
| 127 setIncludeArgumentOops(true); | |
| 128 if (!VM.getVM().isCore()) { | |
| 129 if (updateMap) { | |
| 130 for (int i = 0; i < locationValid.length; i++) { | |
| 131 locationValid[i] = 0; | |
| 132 } | |
| 133 clearPD(); | |
| 134 } else { | |
| 135 initializePD(); | |
| 136 } | |
| 137 } | |
| 138 } | |
| 139 | |
| 140 public Address getLocation(VMReg reg) { | |
| 141 int i = reg.getValue(); | |
| 142 int index = i / locationValidTypeSize; | |
| 143 if (Assert.ASSERTS_ENABLED) { | |
| 144 Assert.that(0 <= i && i < regCount, "sanity check"); | |
| 145 Assert.that(0 <= index && index < locationValidSize, "sanity check"); | |
| 146 } | |
| 147 if ((locationValid[index] & (1 << i % locationValidTypeSize)) != 0) { | |
| 148 return location[i]; | |
| 149 } else { | |
| 150 return getLocationPD(reg); | |
| 151 } | |
| 152 } | |
| 153 | |
| 154 public void setLocation(VMReg reg, Address loc) { | |
| 155 int i = reg.getValue(); | |
| 156 int index = i / locationValidTypeSize; | |
| 157 if (Assert.ASSERTS_ENABLED) { | |
| 158 Assert.that(0 <= i && i < regCount, "sanity check"); | |
| 159 Assert.that(0 <= index && index < locationValidSize, "sanity check"); | |
| 160 Assert.that(updateMap, "updating map that does not need updating"); | |
| 161 } | |
| 162 location[i] = loc; | |
| 163 locationValid[index] |= (1 << (i % locationValidTypeSize)); | |
| 164 } | |
| 165 | |
| 166 public boolean getIncludeArgumentOops() { | |
| 167 return includeArgumentOops; | |
| 168 } | |
| 169 | |
| 170 public void setIncludeArgumentOops(boolean f) { | |
| 171 includeArgumentOops = f; | |
| 172 } | |
| 173 | |
| 174 public JavaThread getThread() { | |
| 175 return thread; | |
| 176 } | |
| 177 | |
| 178 public boolean getUpdateMap() { | |
| 179 return updateMap; | |
| 180 } | |
| 181 | |
| 182 public void print() { | |
| 183 printOn(System.out); | |
| 184 } | |
| 185 | |
| 186 public void printOn(PrintStream tty) { | |
| 187 tty.println("Register map"); | |
| 188 for (int i = 0; i < location.length; i++) { | |
| 189 Address src = getLocation(new VMReg(i)); | |
| 190 if (src != null) { | |
| 191 tty.print(" " + VMRegImpl.getRegisterName(i) + | |
| 192 " [" + src + "] = "); | |
| 193 if (src.andWithMask(VM.getVM().getAddressSize() - 1) != null) { | |
| 194 tty.print("<misaligned>"); | |
| 195 } else { | |
| 196 tty.print(src.getAddressAt(0)); | |
| 197 } | |
| 198 } | |
| 199 } | |
| 200 } | |
| 201 | |
| 202 /** Platform-dependent clear() functionality */ | |
| 203 protected abstract void clearPD(); | |
| 204 /** Platform-dependent initialize() functionality */ | |
| 205 protected abstract void initializePD(); | |
| 206 /** Platform-dependent initializeFrom() functionality */ | |
| 207 protected abstract void initializeFromPD(RegisterMap map); | |
| 208 /** Platform-dependent getLocation() functionality */ | |
| 209 protected abstract Address getLocationPD(VMReg reg); | |
| 210 } |