Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/oops/Method.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 | 18fb7da42534 |
| 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.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 | |
| 37 // A Method represents a Java method | |
| 38 | |
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39 public class Method extends Metadata { |
| 0 | 40 static { |
| 41 VM.registerVMInitializedObserver(new Observer() { | |
| 42 public void update(Observable o, Object data) { | |
| 43 initialize(VM.getVM().getTypeDataBase()); | |
| 44 } | |
| 45 }); | |
| 46 } | |
| 47 | |
| 48 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { | |
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49 Type type = db.lookupType("Method"); |
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50 constMethod = type.getAddressField("_constMethod"); |
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51 methodData = type.getAddressField("_method_data"); |
| 0 | 52 methodSize = new CIntField(type.getCIntegerField("_method_size"), 0); |
| 53 maxStack = new CIntField(type.getCIntegerField("_max_stack"), 0); | |
| 54 maxLocals = new CIntField(type.getCIntegerField("_max_locals"), 0); | |
| 55 sizeOfParameters = new CIntField(type.getCIntegerField("_size_of_parameters"), 0); | |
| 56 accessFlags = new CIntField(type.getCIntegerField("_access_flags"), 0); | |
| 57 code = type.getAddressField("_code"); | |
| 58 vtableIndex = new CIntField(type.getCIntegerField("_vtable_index"), 0); | |
| 59 if (!VM.getVM().isCore()) { | |
| 60 invocationCounter = new CIntField(type.getCIntegerField("_invocation_counter"), 0); | |
| 3939 | 61 backedgeCounter = new CIntField(type.getCIntegerField("_backedge_counter"), 0); |
| 0 | 62 } |
| 63 bytecodeOffset = type.getSize(); | |
| 64 | |
| 3939 | 65 interpreterThrowoutCountField = new CIntField(type.getCIntegerField("_interpreter_throwout_count"), 0); |
| 66 interpreterInvocationCountField = new CIntField(type.getCIntegerField("_interpreter_invocation_count"), 0); | |
| 67 | |
| 0 | 68 /* |
| 69 interpreterEntry = type.getAddressField("_interpreter_entry"); | |
| 70 fromCompiledCodeEntryPoint = type.getAddressField("_from_compiled_code_entry_point"); | |
| 71 | |
| 72 */ | |
| 73 objectInitializerName = null; | |
| 74 classInitializerName = null; | |
| 75 } | |
| 76 | |
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77 public Method(Address addr) { |
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78 super(addr); |
| 0 | 79 } |
| 80 | |
| 81 public boolean isMethod() { return true; } | |
| 82 | |
| 83 // Fields | |
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84 private static AddressField constMethod; |
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85 private static AddressField methodData; |
| 0 | 86 private static CIntField methodSize; |
| 87 private static CIntField maxStack; | |
| 88 private static CIntField maxLocals; | |
| 89 private static CIntField sizeOfParameters; | |
| 90 private static CIntField accessFlags; | |
| 91 private static CIntField vtableIndex; | |
| 92 private static CIntField invocationCounter; | |
| 3939 | 93 private static CIntField backedgeCounter; |
| 0 | 94 private static long bytecodeOffset; |
| 95 | |
| 96 private static AddressField code; | |
| 97 | |
| 3939 | 98 private static CIntField interpreterThrowoutCountField; |
| 99 private static CIntField interpreterInvocationCountField; | |
| 100 | |
| 0 | 101 // constant method names - <init>, <clinit> |
| 102 // Initialized lazily to avoid initialization ordering dependencies between Method and SymbolTable | |
| 103 private static Symbol objectInitializerName; | |
| 104 private static Symbol classInitializerName; | |
| 105 private static Symbol objectInitializerName() { | |
| 106 if (objectInitializerName == null) { | |
| 107 objectInitializerName = VM.getVM().getSymbolTable().probe("<init>"); | |
| 108 } | |
| 109 return objectInitializerName; | |
| 110 } | |
| 111 private static Symbol classInitializerName() { | |
| 112 if (classInitializerName == null) { | |
| 113 classInitializerName = VM.getVM().getSymbolTable().probe("<clinit>"); | |
| 114 } | |
| 115 return classInitializerName; | |
| 116 } | |
| 117 | |
| 118 | |
| 119 /* | |
| 120 private static AddressCField interpreterEntry; | |
| 121 private static AddressCField fromCompiledCodeEntryPoint; | |
| 122 */ | |
| 123 | |
| 124 // Accessors for declared fields | |
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125 public ConstMethod getConstMethod() { |
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126 Address addr = constMethod.getValue(getAddress()); |
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127 return (ConstMethod) VMObjectFactory.newObject(ConstMethod.class, addr); |
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128 } |
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129 public ConstantPool getConstants() { |
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130 return getConstMethod().getConstants(); |
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131 } |
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132 public MethodData getMethodData() { |
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133 Address addr = methodData.getValue(getAddress()); |
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134 return (MethodData) VMObjectFactory.newObject(MethodData.class, addr); |
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135 } |
| 0 | 136 /** WARNING: this is in words, not useful in this system; use getObjectSize() instead */ |
| 137 public long getMethodSize() { return methodSize.getValue(this); } | |
| 138 public long getMaxStack() { return maxStack.getValue(this); } | |
| 139 public long getMaxLocals() { return maxLocals.getValue(this); } | |
| 140 public long getSizeOfParameters() { return sizeOfParameters.getValue(this); } | |
| 141 public long getNameIndex() { return getConstMethod().getNameIndex(); } | |
| 142 public long getSignatureIndex() { return getConstMethod().getSignatureIndex(); } | |
| 143 public long getGenericSignatureIndex() { return getConstMethod().getGenericSignatureIndex(); } | |
| 144 public long getAccessFlags() { return accessFlags.getValue(this); } | |
| 145 public long getCodeSize() { return getConstMethod().getCodeSize(); } | |
| 146 public long getVtableIndex() { return vtableIndex.getValue(this); } | |
| 147 public long getInvocationCounter() { | |
| 148 if (Assert.ASSERTS_ENABLED) { | |
| 149 Assert.that(!VM.getVM().isCore(), "must not be used in core build"); | |
| 150 } | |
| 151 return invocationCounter.getValue(this); | |
| 152 } | |
| 3939 | 153 public long getBackedgeCounter() { |
| 154 if (Assert.ASSERTS_ENABLED) { | |
| 155 Assert.that(!VM.getVM().isCore(), "must not be used in core build"); | |
| 156 } | |
| 157 return backedgeCounter.getValue(this); | |
| 158 } | |
| 0 | 159 |
| 160 // get associated compiled native method, if available, else return null. | |
| 161 public NMethod getNativeMethod() { | |
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162 Address addr = code.getValue(getAddress()); |
| 0 | 163 return (NMethod) VMObjectFactory.newObject(NMethod.class, addr); |
| 164 } | |
| 165 | |
| 166 // Convenience routine | |
| 167 public AccessFlags getAccessFlagsObj() { | |
| 168 return new AccessFlags(getAccessFlags()); | |
| 169 } | |
| 170 | |
| 171 /** Get a bytecode or breakpoint at the given bci */ | |
| 172 public int getBytecodeOrBPAt(int bci) { | |
| 173 return getConstMethod().getBytecodeOrBPAt(bci); | |
| 174 } | |
| 175 | |
| 176 /** Fetch the original non-breakpoint bytecode at the specified | |
| 177 bci. It is required that there is currently a bytecode at this | |
| 178 bci. */ | |
| 179 public int getOrigBytecodeAt(int bci) { | |
| 180 BreakpointInfo bp = ((InstanceKlass) getMethodHolder()).getBreakpoints(); | |
| 181 for (; bp != null; bp = bp.getNext()) { | |
| 182 if (bp.match(this, bci)) { | |
| 183 return bp.getOrigBytecode(); | |
| 184 } | |
| 185 } | |
| 186 System.err.println("Requested bci " + bci); | |
| 187 for (; bp != null; bp = bp.getNext()) { | |
| 188 System.err.println("Breakpoint at bci " + bp.getBCI() + ", bytecode " + | |
| 189 bp.getOrigBytecode()); | |
| 190 } | |
| 191 Assert.that(false, "Should not reach here"); | |
| 192 return -1; // not reached | |
| 193 } | |
| 194 | |
| 195 public byte getBytecodeByteArg(int bci) { | |
| 196 return getConstMethod().getBytecodeByteArg(bci); | |
| 197 } | |
| 198 | |
| 199 /** Fetches a 16-bit big-endian ("Java ordered") value from the | |
| 200 bytecode stream */ | |
| 201 public short getBytecodeShortArg(int bci) { | |
| 202 return getConstMethod().getBytecodeShortArg(bci); | |
| 203 } | |
| 204 | |
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205 /** Fetches a 16-bit native ordered value from the |
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206 bytecode stream */ |
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207 public short getNativeShortArg(int bci) { |
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208 return getConstMethod().getNativeShortArg(bci); |
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209 } |
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210 |
| 0 | 211 /** Fetches a 32-bit big-endian ("Java ordered") value from the |
| 212 bytecode stream */ | |
| 213 public int getBytecodeIntArg(int bci) { | |
| 214 return getConstMethod().getBytecodeIntArg(bci); | |
| 215 } | |
| 216 | |
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217 /** Fetches a 32-bit native ordered value from the |
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218 bytecode stream */ |
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219 public int getNativeIntArg(int bci) { |
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220 return getConstMethod().getNativeIntArg(bci); |
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221 } |
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222 |
| 0 | 223 public byte[] getByteCode() { |
| 224 return getConstMethod().getByteCode(); | |
| 225 } | |
| 226 | |
| 227 /* | |
| 228 public Address getCode() { return codeField.getValue(this); } | |
| 229 public Address getInterpreterEntry() { return interpreterEntryField.getValue(this); } | |
| 230 public Address getFromCompiledCodeEntryPoint() { return fromCompiledCodeEntryPointField.getValue(this); } | |
| 231 */ | |
| 232 // Accessors | |
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233 public Symbol getName() { return getConstants().getSymbolAt(getNameIndex()); } |
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234 public Symbol getSignature() { return getConstants().getSymbolAt(getSignatureIndex()); } |
| 0 | 235 public Symbol getGenericSignature() { |
| 236 long index = getGenericSignatureIndex(); | |
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237 return (index != 0L) ? getConstants().getSymbolAt(index) : null; |
| 0 | 238 } |
| 239 | |
| 240 // Method holder (the Klass holding this method) | |
| 241 public Klass getMethodHolder() { return getConstants().getPoolHolder(); } | |
| 242 | |
| 243 // Access flags | |
| 244 public boolean isPublic() { return getAccessFlagsObj().isPublic(); } | |
| 245 public boolean isPrivate() { return getAccessFlagsObj().isPrivate(); } | |
| 246 public boolean isProtected() { return getAccessFlagsObj().isProtected(); } | |
| 247 public boolean isPackagePrivate() { AccessFlags af = getAccessFlagsObj(); | |
| 248 return (!af.isPublic() && !af.isPrivate() && !af.isProtected()); } | |
| 249 public boolean isStatic() { return getAccessFlagsObj().isStatic(); } | |
| 250 public boolean isFinal() { return getAccessFlagsObj().isFinal(); } | |
| 251 public boolean isSynchronized() { return getAccessFlagsObj().isSynchronized(); } | |
| 252 public boolean isBridge() { return getAccessFlagsObj().isBridge(); } | |
| 253 public boolean isVarArgs() { return getAccessFlagsObj().isVarArgs(); } | |
| 254 public boolean isNative() { return getAccessFlagsObj().isNative(); } | |
| 255 public boolean isAbstract() { return getAccessFlagsObj().isAbstract(); } | |
| 256 public boolean isStrict() { return getAccessFlagsObj().isStrict(); } | |
| 257 public boolean isSynthetic() { return getAccessFlagsObj().isSynthetic(); } | |
| 258 | |
| 259 public boolean isConstructor() { | |
| 260 return (!isStatic()) && getName().equals(objectInitializerName()); | |
| 261 } | |
| 262 | |
| 263 public boolean isStaticInitializer() { | |
| 264 return isStatic() && getName().equals(classInitializerName()); | |
| 265 } | |
| 266 | |
| 267 public boolean isObsolete() { | |
| 268 return getAccessFlagsObj().isObsolete(); | |
| 269 } | |
| 270 | |
| 271 public OopMapCacheEntry getMaskFor(int bci) { | |
| 272 OopMapCacheEntry entry = new OopMapCacheEntry(); | |
| 273 entry.fill(this, bci); | |
| 274 return entry; | |
| 275 } | |
| 276 | |
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277 public long getSize() { |
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278 return getMethodSize(); |
| 0 | 279 } |
| 280 | |
| 281 public void printValueOn(PrintStream tty) { | |
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282 tty.print("Method " + getName().asString() + getSignature().asString() + "@" + getAddress()); |
| 0 | 283 } |
| 284 | |
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285 public void iterateFields(MetadataVisitor visitor) { |
| 0 | 286 visitor.doCInt(methodSize, true); |
| 287 visitor.doCInt(maxStack, true); | |
| 288 visitor.doCInt(maxLocals, true); | |
| 289 visitor.doCInt(sizeOfParameters, true); | |
| 290 visitor.doCInt(accessFlags, true); | |
| 291 } | |
| 292 | |
| 293 public boolean hasLineNumberTable() { | |
| 294 return getConstMethod().hasLineNumberTable(); | |
| 295 } | |
| 296 | |
| 297 public int getLineNumberFromBCI(int bci) { | |
| 298 return getConstMethod().getLineNumberFromBCI(bci); | |
| 299 } | |
| 300 | |
| 301 public LineNumberTableElement[] getLineNumberTable() { | |
| 302 return getConstMethod().getLineNumberTable(); | |
| 303 } | |
| 304 | |
| 305 public boolean hasLocalVariableTable() { | |
| 306 return getConstMethod().hasLocalVariableTable(); | |
| 307 } | |
| 308 | |
| 309 /** Should only be called if table is present */ | |
| 310 public LocalVariableTableElement[] getLocalVariableTable() { | |
| 311 return getConstMethod().getLocalVariableTable(); | |
| 312 } | |
| 313 | |
| 314 public Symbol getLocalVariableName(int bci, int slot) { | |
| 315 if (! hasLocalVariableTable()) { | |
| 316 return null; | |
| 317 } | |
| 318 | |
| 319 LocalVariableTableElement[] locals = getLocalVariableTable(); | |
| 320 for (int l = 0; l < locals.length; l++) { | |
| 321 LocalVariableTableElement local = locals[l]; | |
| 322 if ((bci >= local.getStartBCI()) && | |
| 323 (bci < (local.getStartBCI() + local.getLength())) && | |
| 324 slot == local.getSlot()) { | |
| 325 return getConstants().getSymbolAt(local.getNameCPIndex()); | |
| 326 } | |
| 327 } | |
| 328 | |
| 329 return null; | |
| 330 } | |
| 331 | |
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332 public boolean hasExceptionTable() { |
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333 return getConstMethod().hasExceptionTable(); |
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334 } |
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335 |
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336 public ExceptionTableElement[] getExceptionTable() { |
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337 return getConstMethod().getExceptionTable(); |
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338 } |
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339 |
| 0 | 340 public boolean hasCheckedExceptions() { |
| 341 return getConstMethod().hasCheckedExceptions(); | |
| 342 } | |
| 343 | |
| 344 /** Should only be called if table is present */ | |
| 345 public CheckedExceptionElement[] getCheckedExceptions() { | |
| 346 return getConstMethod().getCheckedExceptions(); | |
| 347 } | |
| 348 | |
| 349 /** Returns name and signature in external form for debugging | |
| 350 purposes */ | |
| 351 public String externalNameAndSignature() { | |
| 352 final StringBuffer buf = new StringBuffer(); | |
| 353 buf.append(getMethodHolder().getName().asString()); | |
| 354 buf.append("."); | |
| 355 buf.append(getName().asString()); | |
| 356 buf.append("("); | |
| 357 new SignatureConverter(getSignature(), buf).iterateParameters(); | |
| 358 buf.append(")"); | |
| 359 return buf.toString().replace('/', '.'); | |
| 360 } | |
| 3939 | 361 public int interpreterThrowoutCount() { |
|
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362 return (int) interpreterThrowoutCountField.getValue(this); |
| 3939 | 363 } |
| 364 | |
| 365 public int interpreterInvocationCount() { | |
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366 return (int) interpreterInvocationCountField.getValue(this); |
| 3939 | 367 } |
| 0 | 368 } |