Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/utilities/AbstractHeapGraphWriter.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 | c18cbe5936b8 |
| children | 8ef918538e22 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2004, 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.utilities; | |
| 26 | |
| 27 import java.io.*; | |
| 28 import sun.jvm.hotspot.debugger.*; | |
| 29 import sun.jvm.hotspot.memory.*; | |
| 30 import sun.jvm.hotspot.oops.*; | |
| 31 import sun.jvm.hotspot.runtime.*; | |
| 32 | |
| 33 /** | |
| 34 * This is abstract base class for heap graph writers. This class does | |
| 35 * not assume any file format for the heap graph. It hides heap | |
| 36 * iteration, object (fields) iteration mechanism from derived | |
| 37 * classes. This class does not even accept OutputStream etc. so that | |
| 38 * derived class can construct specific writer/filter from input | |
| 39 * stream. | |
| 40 */ | |
| 41 | |
| 42 public abstract class AbstractHeapGraphWriter implements HeapGraphWriter { | |
| 43 // the function iterates heap and calls Oop type specific writers | |
| 44 protected void write() throws IOException { | |
| 45 SymbolTable symTbl = VM.getVM().getSymbolTable(); | |
| 46 javaLangClass = symTbl.probe("java/lang/Class"); | |
| 47 javaLangString = symTbl.probe("java/lang/String"); | |
| 48 javaLangThread = symTbl.probe("java/lang/Thread"); | |
| 49 ObjectHeap heap = VM.getVM().getObjectHeap(); | |
| 50 try { | |
| 51 heap.iterate(new DefaultHeapVisitor() { | |
| 52 public void prologue(long usedSize) { | |
| 53 try { | |
| 54 writeHeapHeader(); | |
| 55 } catch (IOException exp) { | |
| 56 throw new RuntimeException(exp); | |
| 57 } | |
| 58 } | |
| 59 | |
| 60 public boolean doObj(Oop oop) { | |
| 61 try { | |
| 62 if (oop instanceof TypeArray) { | |
| 63 writePrimitiveArray((TypeArray)oop); | |
| 64 } else if (oop instanceof ObjArray) { | |
| 65 Klass klass = oop.getKlass(); | |
| 66 ObjArrayKlass oak = (ObjArrayKlass) klass; | |
| 67 Klass bottomType = oak.getBottomKlass(); | |
| 68 if (bottomType instanceof InstanceKlass || | |
| 69 bottomType instanceof TypeArrayKlass) { | |
| 70 writeObjectArray((ObjArray)oop); | |
| 71 } else { | |
| 72 writeInternalObject(oop); | |
| 73 } | |
| 74 } else if (oop instanceof Instance) { | |
| 75 Instance instance = (Instance) oop; | |
| 76 Klass klass = instance.getKlass(); | |
| 77 Symbol name = klass.getName(); | |
| 78 if (name.equals(javaLangString)) { | |
| 79 writeString(instance); | |
| 80 } else if (name.equals(javaLangClass)) { | |
| 81 writeClass(instance); | |
| 82 } else if (name.equals(javaLangThread)) { | |
| 83 writeThread(instance); | |
| 84 } else { | |
| 85 klass = klass.getSuper(); | |
| 86 while (klass != null) { | |
| 87 name = klass.getName(); | |
| 88 if (name.equals(javaLangThread)) { | |
| 89 writeThread(instance); | |
| 90 return false; | |
| 91 } | |
| 92 klass = klass.getSuper(); | |
| 93 } | |
| 94 writeInstance(instance); | |
| 95 } | |
| 96 } else { | |
| 97 // not-a-Java-visible oop | |
| 98 writeInternalObject(oop); | |
| 99 } | |
| 100 } catch (IOException exp) { | |
| 101 throw new RuntimeException(exp); | |
| 102 } | |
| 103 return false; | |
| 104 } | |
| 105 | |
| 106 public void epilogue() { | |
| 107 try { | |
| 108 writeHeapFooter(); | |
| 109 } catch (IOException exp) { | |
| 110 throw new RuntimeException(exp); | |
| 111 } | |
| 112 } | |
| 113 }); | |
| 114 | |
| 115 // write JavaThreads | |
| 116 writeJavaThreads(); | |
| 117 | |
| 118 // write JNI global handles | |
| 119 writeGlobalJNIHandles(); | |
| 120 | |
| 121 } catch (RuntimeException re) { | |
| 122 handleRuntimeException(re); | |
| 123 } | |
| 124 } | |
| 125 | |
| 126 protected void writeJavaThreads() throws IOException { | |
| 127 Threads threads = VM.getVM().getThreads(); | |
| 128 JavaThread jt = threads.first(); | |
| 129 int index = 1; | |
| 130 while (jt != null) { | |
| 131 if (jt.getThreadObj() != null) { | |
| 132 // Note that the thread serial number range is 1-to-N | |
| 133 writeJavaThread(jt, index); | |
| 134 index++; | |
| 135 } | |
| 136 jt = jt.next(); | |
| 137 } | |
| 138 } | |
| 139 | |
| 140 protected void writeJavaThread(JavaThread jt, int index) | |
| 141 throws IOException { | |
| 142 } | |
| 143 | |
| 144 protected void writeGlobalJNIHandles() throws IOException { | |
| 145 JNIHandles handles = VM.getVM().getJNIHandles(); | |
| 146 JNIHandleBlock blk = handles.globalHandles(); | |
| 147 if (blk != null) { | |
| 148 try { | |
| 149 blk.oopsDo(new AddressVisitor() { | |
| 150 public void visitAddress(Address handleAddr) { | |
| 151 try { | |
| 152 if (handleAddr != null) { | |
| 153 writeGlobalJNIHandle(handleAddr); | |
| 154 } | |
| 155 } catch (IOException exp) { | |
| 156 throw new RuntimeException(exp); | |
| 157 } | |
| 158 } | |
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159 public void visitCompOopAddress(Address handleAddr) { |
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160 throw new RuntimeException("Should not reach here. JNIHandles are not compressed"); |
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161 } |
| 0 | 162 }); |
| 163 } catch (RuntimeException re) { | |
| 164 handleRuntimeException(re); | |
| 165 } | |
| 166 } | |
| 167 } | |
| 168 | |
| 169 protected void writeGlobalJNIHandle(Address handleAddr) throws IOException { | |
| 170 } | |
| 171 | |
| 172 protected void writeHeapHeader() throws IOException { | |
| 173 } | |
| 174 | |
| 175 // write non-Java-visible (hotspot internal) object | |
| 176 protected void writeInternalObject(Oop oop) throws IOException { | |
| 177 } | |
| 178 | |
| 179 // write Java primitive array | |
| 180 protected void writePrimitiveArray(TypeArray array) throws IOException { | |
| 181 writeObject(array); | |
| 182 } | |
| 183 | |
| 184 // write Java object array | |
| 185 protected void writeObjectArray(ObjArray array) throws IOException { | |
| 186 writeObject(array); | |
| 187 } | |
| 188 | |
| 189 protected void writeInstance(Instance instance) throws IOException { | |
| 190 writeObject(instance); | |
| 191 } | |
| 192 | |
| 193 protected void writeString(Instance instance) throws IOException { | |
| 194 writeInstance(instance); | |
| 195 } | |
| 196 | |
| 197 protected void writeClass(Instance instance) throws IOException { | |
| 198 writeInstance(instance); | |
| 199 } | |
| 200 | |
| 201 protected void writeThread(Instance instance) throws IOException { | |
| 202 writeInstance(instance); | |
| 203 } | |
| 204 | |
| 205 protected void writeObject(Oop oop) throws IOException { | |
| 206 writeObjectHeader(oop); | |
| 207 writeObjectFields(oop); | |
| 208 writeObjectFooter(oop); | |
| 209 } | |
| 210 | |
| 211 protected void writeObjectHeader(Oop oop) throws IOException { | |
| 212 } | |
| 213 | |
| 214 // write instance fields of given object | |
| 215 protected void writeObjectFields(final Oop oop) throws IOException { | |
| 216 try { | |
| 217 oop.iterate(new DefaultOopVisitor() { | |
| 218 public void doOop(OopField field, boolean isVMField) { | |
| 219 try { | |
| 220 writeReferenceField(oop, field); | |
| 221 } catch (IOException exp) { | |
| 222 throw new RuntimeException(exp); | |
| 223 } | |
| 224 } | |
| 225 | |
| 226 public void doByte(ByteField field, boolean isVMField) { | |
| 227 try { | |
| 228 writeByteField(oop, field); | |
| 229 } catch (IOException exp) { | |
| 230 throw new RuntimeException(exp); | |
| 231 } | |
| 232 } | |
| 233 | |
| 234 public void doChar(CharField field, boolean isVMField) { | |
| 235 try { | |
| 236 writeCharField(oop, field); | |
| 237 } catch (IOException exp) { | |
| 238 throw new RuntimeException(exp); | |
| 239 } | |
| 240 } | |
| 241 | |
| 242 public void doBoolean(BooleanField field, boolean vField) { | |
| 243 try { | |
| 244 writeBooleanField(oop, field); | |
| 245 } catch (IOException exp) { | |
| 246 throw new RuntimeException(exp); | |
| 247 } | |
| 248 } | |
| 249 | |
| 250 public void doShort(ShortField field, boolean isVMField) { | |
| 251 try { | |
| 252 writeShortField(oop, field); | |
| 253 } catch (IOException exp) { | |
| 254 throw new RuntimeException(exp); | |
| 255 } | |
| 256 } | |
| 257 | |
| 258 public void doInt(IntField field, boolean isVMField) { | |
| 259 try { | |
| 260 writeIntField(oop, field); | |
| 261 } catch (IOException exp) { | |
| 262 throw new RuntimeException(exp); | |
| 263 } | |
| 264 } | |
| 265 | |
| 266 public void doLong(LongField field, boolean isVMField) { | |
| 267 try { | |
| 268 writeLongField(oop, field); | |
| 269 } catch (IOException exp) { | |
| 270 throw new RuntimeException(exp); | |
| 271 } | |
| 272 } | |
| 273 | |
| 274 public void doFloat(FloatField field, boolean isVMField) { | |
| 275 try { | |
| 276 writeFloatField(oop, field); | |
| 277 } catch (IOException exp) { | |
| 278 throw new RuntimeException(exp); | |
| 279 } | |
| 280 } | |
| 281 | |
| 282 public void doDouble(DoubleField field, boolean vField) { | |
| 283 try { | |
| 284 writeDoubleField(oop, field); | |
| 285 } catch (IOException exp) { | |
| 286 throw new RuntimeException(exp); | |
| 287 } | |
| 288 } | |
| 289 }, false); | |
| 290 } catch (RuntimeException re) { | |
| 291 handleRuntimeException(re); | |
| 292 } | |
| 293 } | |
| 294 | |
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295 // write instance fields of given object |
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296 protected void writeObjectFields(final InstanceKlass oop) throws IOException { |
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297 try { |
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298 oop.iterateStaticFields(new DefaultOopVisitor() { |
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299 public void doOop(OopField field, boolean isVMField) { |
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300 try { |
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301 writeReferenceField(null, field); |
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302 } catch (IOException exp) { |
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303 throw new RuntimeException(exp); |
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304 } |
| 0 | 305 } |
| 306 | |
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307 public void doByte(ByteField field, boolean isVMField) { |
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308 try { |
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309 writeByteField(null, field); |
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310 } catch (IOException exp) { |
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311 throw new RuntimeException(exp); |
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312 } |
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313 } |
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314 |
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315 public void doChar(CharField field, boolean isVMField) { |
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316 try { |
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317 writeCharField(null, field); |
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318 } catch (IOException exp) { |
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319 throw new RuntimeException(exp); |
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320 } |
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321 } |
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322 |
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323 public void doBoolean(BooleanField field, boolean vField) { |
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324 try { |
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325 writeBooleanField(null, field); |
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326 } catch (IOException exp) { |
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327 throw new RuntimeException(exp); |
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328 } |
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329 } |
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330 |
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331 public void doShort(ShortField field, boolean isVMField) { |
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332 try { |
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333 writeShortField(null, field); |
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334 } catch (IOException exp) { |
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335 throw new RuntimeException(exp); |
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336 } |
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337 } |
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338 |
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339 public void doInt(IntField field, boolean isVMField) { |
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340 try { |
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341 writeIntField(null, field); |
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342 } catch (IOException exp) { |
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343 throw new RuntimeException(exp); |
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344 } |
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345 } |
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346 |
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347 public void doLong(LongField field, boolean isVMField) { |
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348 try { |
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349 writeLongField(null, field); |
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350 } catch (IOException exp) { |
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351 throw new RuntimeException(exp); |
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352 } |
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353 } |
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354 |
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355 public void doFloat(FloatField field, boolean isVMField) { |
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356 try { |
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357 writeFloatField(null, field); |
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358 } catch (IOException exp) { |
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359 throw new RuntimeException(exp); |
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360 } |
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361 } |
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362 |
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363 public void doDouble(DoubleField field, boolean vField) { |
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364 try { |
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365 writeDoubleField(null, field); |
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366 } catch (IOException exp) { |
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367 throw new RuntimeException(exp); |
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368 } |
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369 } |
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370 }); |
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371 } catch (RuntimeException re) { |
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372 handleRuntimeException(re); |
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373 } |
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374 } |
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375 |
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376 // object field writers |
| 0 | 377 protected void writeReferenceField(Oop oop, OopField field) |
| 378 throws IOException { | |
| 379 } | |
| 380 | |
| 381 protected void writeByteField(Oop oop, ByteField field) | |
| 382 throws IOException { | |
| 383 } | |
| 384 | |
| 385 protected void writeCharField(Oop oop, CharField field) | |
| 386 throws IOException { | |
| 387 } | |
| 388 | |
| 389 protected void writeBooleanField(Oop oop, BooleanField field) | |
| 390 throws IOException { | |
| 391 } | |
| 392 | |
| 393 protected void writeShortField(Oop oop, ShortField field) | |
| 394 throws IOException { | |
| 395 } | |
| 396 | |
| 397 protected void writeIntField(Oop oop, IntField field) | |
| 398 throws IOException { | |
| 399 } | |
| 400 | |
| 401 protected void writeLongField(Oop oop, LongField field) | |
| 402 throws IOException { | |
| 403 } | |
| 404 | |
| 405 protected void writeFloatField(Oop oop, FloatField field) | |
| 406 throws IOException { | |
| 407 } | |
| 408 | |
| 409 protected void writeDoubleField(Oop oop, DoubleField field) | |
| 410 throws IOException { | |
| 411 } | |
| 412 | |
| 413 protected void writeObjectFooter(Oop oop) throws IOException { | |
| 414 } | |
| 415 | |
| 416 protected void writeHeapFooter() throws IOException { | |
| 417 } | |
| 418 | |
| 419 // HeapVisitor, OopVisitor methods can't throw any non-runtime | |
| 420 // exception. But, derived class write methods (which are called | |
| 421 // from visitor callbacks) may throw IOException. Hence, we throw | |
| 422 // RuntimeException with origianal IOException as cause from the | |
| 423 // visitor methods. This method gets back the original IOException | |
| 424 // (if any) and re-throws the same. | |
| 425 protected void handleRuntimeException(RuntimeException re) | |
| 426 throws IOException { | |
| 427 Throwable cause = re.getCause(); | |
| 428 if (cause != null && cause instanceof IOException) { | |
| 429 throw (IOException) cause; | |
| 430 } else { | |
| 431 // some other RuntimeException, just re-throw | |
| 432 throw re; | |
| 433 } | |
| 434 } | |
| 435 | |
| 436 // whether a given oop is Java visible or hotspot internal? | |
| 437 protected boolean isJavaVisible(Oop oop) { | |
| 438 if (oop instanceof Instance || oop instanceof TypeArray) { | |
| 439 return true; | |
| 440 } else if (oop instanceof ObjArray) { | |
| 441 ObjArrayKlass oak = (ObjArrayKlass) oop.getKlass(); | |
| 442 Klass bottomKlass = oak.getBottomKlass(); | |
| 443 return bottomKlass instanceof InstanceKlass || | |
| 444 bottomKlass instanceof TypeArrayKlass; | |
| 445 } else { | |
| 446 return false; | |
| 447 } | |
| 448 } | |
| 449 | |
| 450 protected Symbol javaLangClass; | |
| 451 protected Symbol javaLangString; | |
| 452 protected Symbol javaLangThread; | |
| 453 } |