Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/oops/ConstMethod.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 | 8150fa46d2ed |
| children | b2dbd323c668 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2003, 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.code.*; | |
| 30 import sun.jvm.hotspot.debugger.*; | |
| 31 import sun.jvm.hotspot.interpreter.*; | |
| 32 import sun.jvm.hotspot.memory.*; | |
| 33 import sun.jvm.hotspot.runtime.*; | |
| 34 import sun.jvm.hotspot.types.*; | |
| 35 import sun.jvm.hotspot.utilities.*; | |
| 36 | |
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37 public class ConstMethod extends VMObject { |
| 0 | 38 static { |
| 39 VM.registerVMInitializedObserver(new Observer() { | |
| 40 public void update(Observable o, Object data) { | |
| 41 initialize(VM.getVM().getTypeDataBase()); | |
| 42 } | |
| 43 }); | |
| 44 } | |
| 45 | |
| 46 // anon-enum constants for _flags. | |
| 47 private static int HAS_LINENUMBER_TABLE; | |
| 48 private static int HAS_CHECKED_EXCEPTIONS; | |
| 49 private static int HAS_LOCALVARIABLE_TABLE; | |
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50 private static int HAS_EXCEPTION_TABLE; |
| 0 | 51 |
| 52 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { | |
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53 Type type = db.lookupType("ConstMethod"); |
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54 constants = new MetadataField(type.getAddressField("_constants"), 0); |
| 0 | 55 constMethodSize = new CIntField(type.getCIntegerField("_constMethod_size"), 0); |
| 56 flags = new ByteField(type.getJByteField("_flags"), 0); | |
| 57 | |
| 58 // enum constants for flags | |
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59 HAS_LINENUMBER_TABLE = db.lookupIntConstant("ConstMethod::_has_linenumber_table").intValue(); |
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60 HAS_CHECKED_EXCEPTIONS = db.lookupIntConstant("ConstMethod::_has_checked_exceptions").intValue(); |
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61 HAS_LOCALVARIABLE_TABLE = db.lookupIntConstant("ConstMethod::_has_localvariable_table").intValue(); |
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62 HAS_EXCEPTION_TABLE = db.lookupIntConstant("ConstMethod::_has_exception_table").intValue(); |
| 0 | 63 |
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64 // Size of Java bytecodes allocated immediately after ConstMethod*. |
| 0 | 65 codeSize = new CIntField(type.getCIntegerField("_code_size"), 0); |
| 66 nameIndex = new CIntField(type.getCIntegerField("_name_index"), 0); | |
| 67 signatureIndex = new CIntField(type.getCIntegerField("_signature_index"), 0); | |
| 68 genericSignatureIndex = new CIntField(type.getCIntegerField("_generic_signature_index"),0); | |
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69 idnum = new CIntField(type.getCIntegerField("_method_idnum"), 0); |
| 0 | 70 |
| 71 // start of byte code | |
| 72 bytecodeOffset = type.getSize(); | |
| 73 | |
| 74 type = db.lookupType("CheckedExceptionElement"); | |
| 75 checkedExceptionElementSize = type.getSize(); | |
| 76 | |
| 77 type = db.lookupType("LocalVariableTableElement"); | |
| 78 localVariableTableElementSize = type.getSize(); | |
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79 |
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80 type = db.lookupType("ExceptionTableElement"); |
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81 exceptionTableElementSize = type.getSize(); |
| 0 | 82 } |
| 83 | |
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84 public ConstMethod(Address addr) { |
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85 super(addr); |
| 0 | 86 } |
| 87 | |
| 88 // Fields | |
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89 private static MetadataField constants; |
| 0 | 90 private static CIntField constMethodSize; |
| 91 private static ByteField flags; | |
| 92 private static CIntField codeSize; | |
| 93 private static CIntField nameIndex; | |
| 94 private static CIntField signatureIndex; | |
| 95 private static CIntField genericSignatureIndex; | |
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96 private static CIntField idnum; |
| 0 | 97 |
| 98 // start of bytecode | |
| 99 private static long bytecodeOffset; | |
| 100 | |
| 101 private static long checkedExceptionElementSize; | |
| 102 private static long localVariableTableElementSize; | |
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103 private static long exceptionTableElementSize; |
| 0 | 104 |
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105 public Method getMethod() { |
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106 InstanceKlass ik = (InstanceKlass)getConstants().getPoolHolder(); |
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107 MethodArray methods = ik.getMethods(); |
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108 return methods.at((int)getIdNum()); |
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109 } |
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110 |
| 0 | 111 // Accessors for declared fields |
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112 public ConstantPool getConstants() { |
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113 return (ConstantPool) constants.getValue(this); |
| 0 | 114 } |
| 115 | |
| 116 public long getConstMethodSize() { | |
| 117 return constMethodSize.getValue(this); | |
| 118 } | |
| 119 | |
| 120 public byte getFlags() { | |
| 121 return flags.getValue(this); | |
| 122 } | |
| 123 | |
| 124 public long getCodeSize() { | |
| 125 return codeSize.getValue(this); | |
| 126 } | |
| 127 | |
| 128 public long getNameIndex() { | |
| 129 return nameIndex.getValue(this); | |
| 130 } | |
| 131 | |
| 132 public long getSignatureIndex() { | |
| 133 return signatureIndex.getValue(this); | |
| 134 } | |
| 135 | |
| 136 public long getGenericSignatureIndex() { | |
| 137 return genericSignatureIndex.getValue(this); | |
| 138 } | |
| 139 | |
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140 public long getIdNum() { |
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141 return idnum.getValue(this); |
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142 } |
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143 |
| 0 | 144 public Symbol getName() { |
| 145 return getMethod().getName(); | |
| 146 } | |
| 147 | |
| 148 public Symbol getSignature() { | |
| 149 return getMethod().getSignature(); | |
| 150 } | |
| 151 | |
| 152 public Symbol getGenericSignature() { | |
| 153 return getMethod().getGenericSignature(); | |
| 154 } | |
| 155 | |
| 156 // bytecode accessors | |
| 157 | |
| 158 /** Get a bytecode or breakpoint at the given bci */ | |
| 159 public int getBytecodeOrBPAt(int bci) { | |
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160 return getAddress().getJByteAt(bytecodeOffset + bci) & 0xFF; |
| 0 | 161 } |
| 162 | |
| 163 public byte getBytecodeByteArg(int bci) { | |
| 164 return (byte) getBytecodeOrBPAt(bci); | |
| 165 } | |
| 166 | |
| 167 /** Fetches a 16-bit big-endian ("Java ordered") value from the | |
| 168 bytecode stream */ | |
| 169 public short getBytecodeShortArg(int bci) { | |
| 170 int hi = getBytecodeOrBPAt(bci); | |
| 171 int lo = getBytecodeOrBPAt(bci + 1); | |
| 172 return (short) ((hi << 8) | lo); | |
| 173 } | |
| 174 | |
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175 /** Fetches a 16-bit native ordered value from the |
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176 bytecode stream */ |
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177 public short getNativeShortArg(int bci) { |
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178 int hi = getBytecodeOrBPAt(bci); |
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179 int lo = getBytecodeOrBPAt(bci + 1); |
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180 if (VM.getVM().isBigEndian()) { |
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181 return (short) ((hi << 8) | lo); |
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182 } else { |
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183 return (short) ((lo << 8) | hi); |
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184 } |
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185 } |
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186 |
| 0 | 187 /** Fetches a 32-bit big-endian ("Java ordered") value from the |
| 188 bytecode stream */ | |
| 189 public int getBytecodeIntArg(int bci) { | |
| 190 int b4 = getBytecodeOrBPAt(bci); | |
| 191 int b3 = getBytecodeOrBPAt(bci + 1); | |
| 192 int b2 = getBytecodeOrBPAt(bci + 2); | |
| 193 int b1 = getBytecodeOrBPAt(bci + 3); | |
| 194 | |
| 195 return (b4 << 24) | (b3 << 16) | (b2 << 8) | b1; | |
| 196 } | |
| 197 | |
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198 /** Fetches a 32-bit native ordered value from the |
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199 bytecode stream */ |
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200 public int getNativeIntArg(int bci) { |
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201 int b4 = getBytecodeOrBPAt(bci); |
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202 int b3 = getBytecodeOrBPAt(bci + 1); |
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203 int b2 = getBytecodeOrBPAt(bci + 2); |
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204 int b1 = getBytecodeOrBPAt(bci + 3); |
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205 |
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206 if (VM.getVM().isBigEndian()) { |
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207 return (b4 << 24) | (b3 << 16) | (b2 << 8) | b1; |
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208 } else { |
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209 return (b1 << 24) | (b2 << 16) | (b3 << 8) | b4; |
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210 } |
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211 } |
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212 |
| 0 | 213 public byte[] getByteCode() { |
| 214 byte[] bc = new byte[ (int) getCodeSize() ]; | |
| 215 for( int i=0; i < bc.length; i++ ) | |
| 216 { | |
| 217 long offs = bytecodeOffset + i; | |
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218 bc[i] = getAddress().getJByteAt( offs ); |
| 0 | 219 } |
| 220 return bc; | |
| 221 } | |
| 222 | |
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223 public long getSize() { |
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224 return getConstMethodSize(); |
| 0 | 225 } |
| 226 | |
| 227 public void printValueOn(PrintStream tty) { | |
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228 tty.print("ConstMethod " + getName().asString() + getSignature().asString() + "@" + getAddress()); |
| 0 | 229 } |
| 230 | |
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231 public void iterateFields(MetadataVisitor visitor) { |
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232 visitor.doMetadata(constants, true); |
| 0 | 233 visitor.doCInt(constMethodSize, true); |
| 234 visitor.doByte(flags, true); | |
| 235 visitor.doCInt(codeSize, true); | |
| 236 visitor.doCInt(nameIndex, true); | |
| 237 visitor.doCInt(signatureIndex, true); | |
| 238 visitor.doCInt(genericSignatureIndex, true); | |
| 239 visitor.doCInt(codeSize, true); | |
| 240 } | |
| 241 | |
| 242 // Accessors | |
| 243 | |
| 244 public boolean hasLineNumberTable() { | |
| 245 return (getFlags() & HAS_LINENUMBER_TABLE) != 0; | |
| 246 } | |
| 247 | |
| 248 public int getLineNumberFromBCI(int bci) { | |
| 249 if (!VM.getVM().isCore()) { | |
| 250 if (bci == DebugInformationRecorder.SYNCHRONIZATION_ENTRY_BCI) bci = 0; | |
| 251 } | |
| 252 | |
| 253 if (isNative()) { | |
| 254 return -1; | |
| 255 } | |
| 256 | |
| 257 if (Assert.ASSERTS_ENABLED) { | |
| 258 Assert.that(bci == 0 || 0 <= bci && bci < getCodeSize(), "illegal bci"); | |
| 259 } | |
| 260 int bestBCI = 0; | |
| 261 int bestLine = -1; | |
| 262 if (hasLineNumberTable()) { | |
| 263 // The line numbers are a short array of 2-tuples [start_pc, line_number]. | |
| 264 // Not necessarily sorted and not necessarily one-to-one. | |
| 265 CompressedLineNumberReadStream stream = | |
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266 new CompressedLineNumberReadStream(getAddress(), (int) offsetOfCompressedLineNumberTable()); |
| 0 | 267 while (stream.readPair()) { |
| 268 if (stream.bci() == bci) { | |
| 269 // perfect match | |
| 270 return stream.line(); | |
| 271 } else { | |
| 272 // update best_bci/line | |
| 273 if (stream.bci() < bci && stream.bci() >= bestBCI) { | |
| 274 bestBCI = stream.bci(); | |
| 275 bestLine = stream.line(); | |
| 276 } | |
| 277 } | |
| 278 } | |
| 279 } | |
| 280 return bestLine; | |
| 281 } | |
| 282 | |
| 283 public LineNumberTableElement[] getLineNumberTable() { | |
| 284 if (Assert.ASSERTS_ENABLED) { | |
| 285 Assert.that(hasLineNumberTable(), | |
| 286 "should only be called if table is present"); | |
| 287 } | |
| 288 int len = getLineNumberTableLength(); | |
| 289 CompressedLineNumberReadStream stream = | |
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290 new CompressedLineNumberReadStream(getAddress(), (int) offsetOfCompressedLineNumberTable()); |
| 0 | 291 LineNumberTableElement[] ret = new LineNumberTableElement[len]; |
| 292 | |
| 293 for (int idx = 0; idx < len; idx++) { | |
| 294 stream.readPair(); | |
| 295 ret[idx] = new LineNumberTableElement(stream.bci(), stream.line()); | |
| 296 } | |
| 297 return ret; | |
| 298 } | |
| 299 | |
| 300 public boolean hasLocalVariableTable() { | |
| 301 return (getFlags() & HAS_LOCALVARIABLE_TABLE) != 0; | |
| 302 } | |
| 303 | |
| 304 public Symbol getLocalVariableName(int bci, int slot) { | |
| 305 return getMethod().getLocalVariableName(bci, slot); | |
| 306 } | |
| 307 | |
| 308 /** Should only be called if table is present */ | |
| 309 public LocalVariableTableElement[] getLocalVariableTable() { | |
| 310 if (Assert.ASSERTS_ENABLED) { | |
| 311 Assert.that(hasLocalVariableTable(), "should only be called if table is present"); | |
| 312 } | |
| 313 LocalVariableTableElement[] ret = new LocalVariableTableElement[getLocalVariableTableLength()]; | |
| 314 long offset = offsetOfLocalVariableTable(); | |
| 315 for (int i = 0; i < ret.length; i++) { | |
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316 ret[i] = new LocalVariableTableElement(getAddress(), offset); |
| 0 | 317 offset += localVariableTableElementSize; |
| 318 } | |
| 319 return ret; | |
| 320 } | |
| 321 | |
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322 public boolean hasExceptionTable() { |
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323 return (getFlags() & HAS_EXCEPTION_TABLE) != 0; |
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324 } |
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325 |
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326 public ExceptionTableElement[] getExceptionTable() { |
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327 if (Assert.ASSERTS_ENABLED) { |
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328 Assert.that(hasExceptionTable(), "should only be called if table is present"); |
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329 } |
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330 ExceptionTableElement[] ret = new ExceptionTableElement[getExceptionTableLength()]; |
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331 long offset = offsetOfExceptionTable(); |
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332 for (int i = 0; i < ret.length; i++) { |
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333 ret[i] = new ExceptionTableElement(getAddress(), offset); |
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334 offset += exceptionTableElementSize; |
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335 } |
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336 return ret; |
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337 } |
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338 |
| 0 | 339 public boolean hasCheckedExceptions() { |
| 340 return (getFlags() & HAS_CHECKED_EXCEPTIONS) != 0; | |
| 341 } | |
| 342 | |
| 343 public CheckedExceptionElement[] getCheckedExceptions() { | |
| 344 if (Assert.ASSERTS_ENABLED) { | |
| 345 Assert.that(hasCheckedExceptions(), "should only be called if table is present"); | |
| 346 } | |
| 347 CheckedExceptionElement[] ret = new CheckedExceptionElement[getCheckedExceptionsLength()]; | |
| 348 long offset = offsetOfCheckedExceptions(); | |
| 349 for (int i = 0; i < ret.length; i++) { | |
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350 ret[i] = new CheckedExceptionElement(getAddress(), offset); |
| 0 | 351 offset += checkedExceptionElementSize; |
| 352 } | |
| 353 return ret; | |
| 354 } | |
| 355 | |
| 356 | |
| 357 //--------------------------------------------------------------------------- | |
| 358 // Internals only below this point | |
| 359 // | |
| 360 | |
| 361 private boolean isNative() { | |
| 362 return getMethod().isNative(); | |
| 363 } | |
| 364 | |
| 365 // Offset of end of code | |
| 366 private long offsetOfCodeEnd() { | |
| 367 return bytecodeOffset + getCodeSize(); | |
| 368 } | |
| 369 | |
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370 // Offset of start of compressed line number table (see method.hpp) |
| 0 | 371 private long offsetOfCompressedLineNumberTable() { |
| 372 return offsetOfCodeEnd() + (isNative() ? 2 * VM.getVM().getAddressSize() : 0); | |
| 373 } | |
| 374 | |
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375 // Offset of last short in Method* |
| 0 | 376 private long offsetOfLastU2Element() { |
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377 return getSize() * VM.getVM().getObjectHeap().getOopSize() - 2; |
| 0 | 378 } |
| 379 | |
| 380 private long offsetOfCheckedExceptionsLength() { | |
| 381 return offsetOfLastU2Element(); | |
| 382 } | |
| 383 | |
| 384 private int getCheckedExceptionsLength() { | |
| 385 if (hasCheckedExceptions()) { | |
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386 return (int) getAddress().getCIntegerAt(offsetOfCheckedExceptionsLength(), 2, true); |
| 0 | 387 } else { |
| 388 return 0; | |
| 389 } | |
| 390 } | |
| 391 | |
| 392 // Offset of start of checked exceptions | |
| 393 private long offsetOfCheckedExceptions() { | |
| 394 long offset = offsetOfCheckedExceptionsLength(); | |
| 395 long length = getCheckedExceptionsLength(); | |
| 396 if (Assert.ASSERTS_ENABLED) { | |
| 397 Assert.that(length > 0, "should only be called if table is present"); | |
| 398 } | |
| 399 offset -= length * checkedExceptionElementSize; | |
| 400 return offset; | |
| 401 } | |
| 402 | |
| 403 private int getLineNumberTableLength() { | |
| 404 int len = 0; | |
| 405 if (hasLineNumberTable()) { | |
| 406 CompressedLineNumberReadStream stream = | |
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407 new CompressedLineNumberReadStream(getAddress(), (int) offsetOfCompressedLineNumberTable()); |
| 0 | 408 while (stream.readPair()) { |
| 409 len += 1; | |
| 410 } | |
| 411 } | |
| 412 return len; | |
| 413 } | |
| 414 | |
| 415 private int getLocalVariableTableLength() { | |
| 416 if (hasLocalVariableTable()) { | |
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417 return (int) getAddress().getCIntegerAt(offsetOfLocalVariableTableLength(), 2, true); |
| 0 | 418 } else { |
| 419 return 0; | |
| 420 } | |
| 421 } | |
| 422 | |
| 423 // Offset of local variable table length | |
| 424 private long offsetOfLocalVariableTableLength() { | |
| 425 if (Assert.ASSERTS_ENABLED) { | |
| 426 Assert.that(hasLocalVariableTable(), "should only be called if table is present"); | |
| 427 } | |
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428 |
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429 if (hasExceptionTable()) { |
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430 return offsetOfExceptionTable() - 2; |
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431 } else if (hasCheckedExceptions()) { |
| 0 | 432 return offsetOfCheckedExceptions() - 2; |
| 433 } else { | |
| 434 return offsetOfLastU2Element(); | |
| 435 } | |
| 436 } | |
| 437 | |
| 438 private long offsetOfLocalVariableTable() { | |
| 439 long offset = offsetOfLocalVariableTableLength(); | |
| 440 long length = getLocalVariableTableLength(); | |
| 441 if (Assert.ASSERTS_ENABLED) { | |
| 442 Assert.that(length > 0, "should only be called if table is present"); | |
| 443 } | |
| 444 offset -= length * localVariableTableElementSize; | |
| 445 return offset; | |
| 446 } | |
| 447 | |
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448 private int getExceptionTableLength() { |
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449 if (hasExceptionTable()) { |
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450 return (int) getAddress().getCIntegerAt(offsetOfExceptionTableLength(), 2, true); |
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451 } else { |
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452 return 0; |
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453 } |
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454 } |
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455 |
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456 private long offsetOfExceptionTableLength() { |
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457 if (Assert.ASSERTS_ENABLED) { |
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458 Assert.that(hasExceptionTable(), "should only be called if table is present"); |
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459 } |
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460 if (hasCheckedExceptions()) { |
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461 return offsetOfCheckedExceptions() - 2; |
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462 } else { |
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463 return offsetOfLastU2Element(); |
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464 } |
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465 } |
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466 |
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467 private long offsetOfExceptionTable() { |
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468 long offset = offsetOfExceptionTableLength(); |
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469 long length = getExceptionTableLength(); |
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470 if (Assert.ASSERTS_ENABLED) { |
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471 Assert.that(length > 0, "should only be called if table is present"); |
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472 } |
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473 offset -= length * exceptionTableElementSize; |
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474 return offset; |
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475 } |
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476 |
| 0 | 477 } |