Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/oops/MethodData.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 | f6f3bb0ee072 |
| children | bd7a7ce2e264 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2000, 2012, 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.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 // A MethodData provides interpreter profiling information | |
| 35 | |
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36 public class MethodData extends Metadata { |
| 3939 | 37 static int TypeProfileWidth = 2; |
| 38 static int BciProfileWidth = 2; | |
| 39 static int CompileThreshold; | |
| 40 | |
| 41 static int Reason_many; // indicates presence of several reasons | |
| 42 static int Reason_none; // indicates absence of a relevant deopt. | |
| 43 static int Reason_LIMIT; | |
| 44 static int Reason_RECORDED_LIMIT; // some are not recorded per bc | |
| 45 | |
| 46 private static String[] trapReasonName; | |
| 47 | |
| 48 static String trapReasonName(int reason) { | |
| 49 if (reason == Reason_many) return "many"; | |
| 50 if (reason < Reason_LIMIT) | |
| 51 return trapReasonName[reason]; | |
| 52 return "reason" + reason; | |
| 53 } | |
| 54 | |
| 55 | |
| 56 static int trapStateReason(int trapState) { | |
| 57 // This assert provides the link between the width of DataLayout.trapBits | |
| 58 // and the encoding of "recorded" reasons. It ensures there are enough | |
| 59 // bits to store all needed reasons in the per-BCI MDO profile. | |
| 60 // assert(dsReasonMask >= reasonRecordedLimit, "enough bits"); | |
| 61 int recompileBit = (trapState & dsRecompileBit); | |
| 62 trapState -= recompileBit; | |
| 63 if (trapState == dsReasonMask) { | |
| 64 return Reason_many; | |
| 65 } else { | |
| 66 // assert((int)reasonNone == 0, "state=0 => Reason_none"); | |
| 67 return trapState; | |
| 68 } | |
| 69 } | |
| 70 | |
| 71 | |
| 72 static final int dsReasonMask = DataLayout.trapMask >> 1; | |
| 73 static final int dsRecompileBit = DataLayout.trapMask - dsReasonMask; | |
| 74 | |
| 75 static boolean trapStateIsRecompiled(int trapState) { | |
| 76 return (trapState & dsRecompileBit) != 0; | |
| 77 } | |
| 78 | |
| 79 static boolean reasonIsRecordedPerBytecode(int reason) { | |
| 80 return reason > Reason_none && reason < Reason_RECORDED_LIMIT; | |
| 81 } | |
| 82 static int trapStateAddReason(int trapState, int reason) { | |
| 83 // assert(reasonIsRecordedPerBytecode((DeoptReason)reason) || reason == reasonMany, "valid reason"); | |
| 84 int recompileBit = (trapState & dsRecompileBit); | |
| 85 trapState -= recompileBit; | |
| 86 if (trapState == dsReasonMask) { | |
| 87 return trapState + recompileBit; // already at state lattice bottom | |
| 88 } else if (trapState == reason) { | |
| 89 return trapState + recompileBit; // the condition is already true | |
| 90 } else if (trapState == 0) { | |
| 91 return reason + recompileBit; // no condition has yet been true | |
| 92 } else { | |
| 93 return dsReasonMask + recompileBit; // fall to state lattice bottom | |
| 94 } | |
| 95 } | |
| 96 static int trapStateSetRecompiled(int trapState, boolean z) { | |
| 97 if (z) return trapState | dsRecompileBit; | |
| 98 else return trapState & ~dsRecompileBit; | |
| 99 } | |
| 100 | |
| 101 static String formatTrapState(int trapState) { | |
| 102 int reason = trapStateReason(trapState); | |
| 103 boolean recompFlag = trapStateIsRecompiled(trapState); | |
| 104 // Re-encode the state from its decoded components. | |
| 105 int decodedState = 0; | |
| 106 if (reasonIsRecordedPerBytecode(reason) || reason == Reason_many) | |
| 107 decodedState = trapStateAddReason(decodedState, reason); | |
| 108 if (recompFlag) | |
| 109 decodedState = trapStateSetRecompiled(decodedState, recompFlag); | |
| 110 // If the state re-encodes properly, format it symbolically. | |
| 111 // Because this routine is used for debugging and diagnostics, | |
| 112 // be robust even if the state is a strange value. | |
| 113 if (decodedState != trapState) { | |
| 114 // Random buggy state that doesn't decode?? | |
| 115 return "#" + trapState; | |
| 116 } else { | |
| 117 return trapReasonName(reason) + (recompFlag ? " recompiled" : ""); | |
| 118 } | |
| 119 } | |
| 120 | |
| 121 | |
| 122 | |
| 0 | 123 static { |
| 124 VM.registerVMInitializedObserver(new Observer() { | |
| 125 public void update(Observable o, Object data) { | |
| 126 initialize(VM.getVM().getTypeDataBase()); | |
| 127 } | |
| 128 }); | |
| 129 } | |
| 130 | |
| 131 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { | |
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132 Type type = db.lookupType("MethodData"); |
| 0 | 133 baseOffset = type.getSize(); |
| 134 | |
| 135 size = new CIntField(type.getCIntegerField("_size"), 0); | |
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136 method = new MetadataField(type.getAddressField("_method"), 0); |
| 3939 | 137 |
| 138 VM.Flag[] flags = VM.getVM().getCommandLineFlags(); | |
| 139 for (int f = 0; f < flags.length; f++) { | |
| 140 VM.Flag flag = flags[f]; | |
| 141 if (flag.getName().equals("TypeProfileWidth")) { | |
| 142 TypeProfileWidth = (int)flag.getIntx(); | |
| 143 } else if (flag.getName().equals("BciProfileWidth")) { | |
| 144 BciProfileWidth = (int)flag.getIntx(); | |
| 145 } else if (flag.getName().equals("CompileThreshold")) { | |
| 146 CompileThreshold = (int)flag.getIntx(); | |
| 147 } | |
| 148 } | |
| 149 | |
| 150 cellSize = (int)VM.getVM().getAddressSize(); | |
| 151 | |
| 152 dataSize = new CIntField(type.getCIntegerField("_data_size"), 0); | |
| 153 data = type.getAddressField("_data[0]"); | |
| 154 | |
| 155 sizeofMethodDataOopDesc = (int)type.getSize();; | |
| 156 | |
| 157 Reason_many = db.lookupIntConstant("Deoptimization::Reason_many").intValue(); | |
| 158 Reason_none = db.lookupIntConstant("Deoptimization::Reason_none").intValue(); | |
| 159 Reason_LIMIT = db.lookupIntConstant("Deoptimization::Reason_LIMIT").intValue(); | |
| 160 Reason_RECORDED_LIMIT = db.lookupIntConstant("Deoptimization::Reason_RECORDED_LIMIT").intValue(); | |
| 161 | |
| 162 trapReasonName = new String[Reason_LIMIT]; | |
| 163 | |
| 164 // Find Deopt reasons | |
| 165 Iterator i = db.getIntConstants(); | |
| 166 String prefix = "Deoptimization::Reason_"; | |
| 167 while (i.hasNext()) { | |
| 168 String name = (String)i.next(); | |
| 169 if (name.startsWith(prefix)) { | |
| 170 // Strip prefix | |
| 171 if (!name.endsWith("Reason_many") && | |
| 172 !name.endsWith("Reason_LIMIT") && | |
| 173 !name.endsWith("Reason_RECORDED_LIMIT")) { | |
| 174 String trimmed = name.substring(prefix.length()); | |
| 175 int value = db.lookupIntConstant(name).intValue(); | |
| 176 if (trapReasonName[value] != null) { | |
| 177 throw new InternalError("duplicate reasons: " + trapReasonName[value] + " " + trimmed); | |
| 178 } | |
| 179 trapReasonName[value] = trimmed; | |
| 180 } | |
| 181 } | |
| 182 } | |
| 183 for (int index = 0; index < trapReasonName.length; index++) { | |
| 184 if (trapReasonName[index] == null) { | |
| 185 throw new InternalError("missing reason for " + index); | |
| 186 } | |
| 187 System.out.println(trapReasonName[index]); | |
| 188 } | |
| 0 | 189 } |
| 190 | |
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191 public MethodData(Address addr) { |
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192 super(addr); |
| 0 | 193 } |
| 194 | |
| 195 public boolean isMethodData() { return true; } | |
| 196 | |
| 197 private static long baseOffset; | |
| 198 private static CIntField size; | |
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199 private static MetadataField method; |
| 3939 | 200 private static CIntField dataSize; |
| 201 private static AddressField data; | |
| 202 | |
| 203 public static int sizeofMethodDataOopDesc; | |
| 204 public static int cellSize; | |
| 0 | 205 |
| 206 public Method getMethod() { | |
| 207 return (Method) method.getValue(this); | |
| 208 } | |
| 209 | |
| 210 public void printValueOn(PrintStream tty) { | |
| 211 Method m = getMethod(); | |
| 212 tty.print("MethodData for " + m.getName().asString() + m.getSignature().asString()); | |
| 213 } | |
| 214 | |
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215 public void iterateFields(MetadataVisitor visitor) { |
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216 super.iterateFields(visitor); |
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217 visitor.doMetadata(method, true); |
| 0 | 218 visitor.doCInt(size, true); |
| 219 } | |
| 3939 | 220 |
| 221 int dataSize() { | |
| 222 if (dataSize == null) { | |
| 223 return 0; | |
| 224 } else { | |
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225 return (int)dataSize.getValue(getAddress()); |
| 3939 | 226 } |
| 227 } | |
| 228 | |
| 229 boolean outOfBounds(int dataIndex) { | |
| 230 return dataIndex >= dataSize(); | |
| 231 } | |
| 232 | |
| 233 ProfileData dataAt(int dataIndex) { | |
| 234 if (outOfBounds(dataIndex)) { | |
| 235 return null; | |
| 236 } | |
| 237 DataLayout dataLayout = new DataLayout(this, dataIndex + (int)data.getOffset()); | |
| 238 | |
| 239 switch (dataLayout.tag()) { | |
| 240 case DataLayout.noTag: | |
| 241 default: | |
| 242 throw new InternalError(dataIndex + " " + dataSize() + " " + dataLayout.tag()); | |
| 243 case DataLayout.bitDataTag: | |
| 244 return new BitData(dataLayout); | |
| 245 case DataLayout.counterDataTag: | |
| 246 return new CounterData(dataLayout); | |
| 247 case DataLayout.jumpDataTag: | |
| 248 return new JumpData(dataLayout); | |
| 249 case DataLayout.receiverTypeDataTag: | |
| 250 return new ReceiverTypeData(dataLayout); | |
| 251 case DataLayout.virtualCallDataTag: | |
| 252 return new VirtualCallData(dataLayout); | |
| 253 case DataLayout.retDataTag: | |
| 254 return new RetData(dataLayout); | |
| 255 case DataLayout.branchDataTag: | |
| 256 return new BranchData(dataLayout); | |
| 257 case DataLayout.multiBranchDataTag: | |
| 258 return new MultiBranchData(dataLayout); | |
| 259 } | |
| 260 } | |
| 261 | |
| 262 int dpToDi(int dp) { | |
| 263 // this in an offset from the base of the MDO, so convert to offset into _data | |
| 264 return dp - (int)data.getOffset(); | |
| 265 } | |
| 266 | |
| 267 int firstDi() { return 0; } | |
| 268 public ProfileData firstData() { return dataAt(firstDi()); } | |
| 269 public ProfileData nextData(ProfileData current) { | |
| 270 int currentIndex = dpToDi(current.dp()); | |
| 271 int nextIndex = currentIndex + current.sizeInBytes(); | |
| 272 return dataAt(nextIndex); | |
| 273 } | |
| 274 boolean isValid(ProfileData current) { return current != null; } | |
| 275 | |
| 276 public void printDataOn(PrintStream st) { | |
| 277 ProfileData data = firstData(); | |
| 278 for ( ; isValid(data); data = nextData(data)) { | |
| 279 st.print(dpToDi(data.dp())); | |
| 280 st.print(" "); | |
| 281 // st->fillTo(6); | |
| 282 data.printDataOn(st); | |
| 283 } | |
| 284 } | |
| 285 | |
| 286 private byte[] fetchDataAt(Address base, long offset, long size) { | |
| 287 byte[] result = new byte[(int)size]; | |
| 288 for (int i = 0; i < size; i++) { | |
| 289 result[i] = base.getJByteAt(offset + i); | |
| 290 } | |
| 291 return result; | |
| 292 } | |
| 293 | |
| 294 public byte[] orig() { | |
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295 // fetch the orig MethodData data between header and dataSize |
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296 return fetchDataAt(getAddress(), 0, sizeofMethodDataOopDesc); |
| 3939 | 297 } |
| 298 | |
| 299 public long[] data() { | |
| 300 // Read the data as an array of intptr_t elements | |
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301 Address base = getAddress(); |
| 3939 | 302 long offset = data.getOffset(); |
| 303 int elements = dataSize() / cellSize; | |
| 304 long[] result = new long[elements]; | |
| 305 for (int i = 0; i < elements; i++) { | |
| 306 Address value = base.getAddressAt(offset + i * MethodData.cellSize); | |
| 307 if (value != null) { | |
| 308 result[i] = value.minus(null); | |
| 309 } | |
| 310 } | |
| 311 return result; | |
| 312 } | |
| 313 | |
| 314 // Get a measure of how much mileage the method has on it. | |
| 315 int mileageOf(Method method) { | |
| 316 long mileage = 0; | |
| 317 int iic = method.interpreterInvocationCount(); | |
| 318 if (mileage < iic) mileage = iic; | |
| 319 | |
| 320 long ic = method.getInvocationCounter(); | |
| 321 long bc = method.getBackedgeCounter(); | |
| 322 | |
| 323 long icval = ic >> 3; | |
| 324 if ((ic & 4) != 0) icval += CompileThreshold; | |
| 325 if (mileage < icval) mileage = icval; | |
| 326 long bcval = bc >> 3; | |
| 327 if ((bc & 4) != 0) bcval += CompileThreshold; | |
| 328 if (mileage < bcval) mileage = bcval; | |
| 329 return (int)mileage; | |
| 330 } | |
| 331 | |
| 332 public int currentMileage() { | |
| 333 return 20000; | |
| 334 } | |
| 0 | 335 } |