J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2003-2004 Sun Microsystems, Inc. All Rights Reserved. |
| 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 | * |
| 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | */ |
| 23 | |
| 24 | /** |
| 25 | * @test |
| 26 | * @bug 4882798 |
| 27 | * @summary multi-thread test to exercise sync and contention for adds to transformer registry |
| 28 | * @author Gabriel Adauto, Wily Technology |
| 29 | * |
| 30 | * @run build TransformerManagementThreadAddTests |
| 31 | * @run shell MakeJAR.sh redefineAgent |
| 32 | * @run main/othervm -javaagent:redefineAgent.jar TransformerManagementThreadAddTests TransformerManagementThreadAddTests |
| 33 | */ |
| 34 | import java.io.*; |
| 35 | import java.lang.instrument.*; |
| 36 | import java.security.ProtectionDomain; |
| 37 | import java.util.*; |
| 38 | |
| 39 | public class TransformerManagementThreadAddTests extends ATestCaseScaffold |
| 40 | { |
| 41 | public static void |
| 42 | main (String[] args) |
| 43 | throws Throwable { |
| 44 | ATestCaseScaffold test = new TransformerManagementThreadAddTests(args[0]); |
| 45 | test.runTest(); |
| 46 | } |
| 47 | |
| 48 | protected void |
| 49 | doRunTest() |
| 50 | throws Throwable { |
| 51 | testMultiThreadAdds(); |
| 52 | } |
| 53 | |
| 54 | |
| 55 | /** |
| 56 | * CONFIGURATION FOR TEST |
| 57 | * ---------------------- |
| 58 | * Set these variables to different values to test the object that |
| 59 | * manages the transformers. |
| 60 | * |
| 61 | * MIN_TRANS: the minimum number of transformers to add by a thread |
| 62 | * MAX_TRANS: the maximum number of transformers to add by a thread |
| 63 | * There will be a total of MAX_TRANS-MIN_TRANS+1 threads created. |
| 64 | * Each thread will add between MIN_TRANS and MAX_TRANS transformers |
| 65 | * to the manager. |
| 66 | * |
| 67 | * REMOVE_THREADS: the number of threads to run that spend their time |
| 68 | * removing transformers |
| 69 | */ |
| 70 | protected static final int MIN_TRANS = 33; |
| 71 | protected static final int MAX_TRANS = 45; |
| 72 | protected static final int REMOVE_THREADS = 5; |
| 73 | |
| 74 | protected static final boolean LOG_TRANSFORMATIONS = false; |
| 75 | |
| 76 | /** |
| 77 | * Field variables |
| 78 | */ |
| 79 | protected static final int TOTAL_THREADS = MAX_TRANS - MIN_TRANS + 1; |
| 80 | |
| 81 | private byte[] fDummyClassBytes; |
| 82 | private Vector fCheckedTransformers; |
| 83 | private Instrumentation fInstrumentation; |
| 84 | private int fFinished; |
| 85 | private ExecuteTransformersThread fExec; |
| 86 | |
| 87 | // Need to use this for synchronization in subclass |
| 88 | protected Vector fAddedTransformers; |
| 89 | private String fDummyClassName; |
| 90 | |
| 91 | /** |
| 92 | * Constructor for TransformerManagementThreadAddTests. |
| 93 | * @param name Name for the test |
| 94 | */ |
| 95 | public TransformerManagementThreadAddTests(String name) |
| 96 | { |
| 97 | super(name); |
| 98 | |
| 99 | fCheckedTransformers = new Vector(); |
| 100 | fAddedTransformers = new Vector(); |
| 101 | |
| 102 | fDummyClassName = "DummyClass"; |
| 103 | String resourceName = "DummyClass.class"; |
| 104 | File f = new File(System.getProperty("test.classes", "."), resourceName); |
| 105 | System.out.println("Reading test class from " + f); |
| 106 | try |
| 107 | { |
| 108 | InputStream redefineStream = new FileInputStream(f); |
| 109 | fDummyClassBytes = NamedBuffer.loadBufferFromStream(redefineStream); |
| 110 | } |
| 111 | catch (IOException e) |
| 112 | { |
| 113 | fail("Could not load the class: "+resourceName); |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | public void |
| 118 | testMultiThreadAdds() |
| 119 | { |
| 120 | TransformerThread[] threads = new TransformerThread[TOTAL_THREADS]; |
| 121 | for (int i = MIN_TRANS; i <= MAX_TRANS; i++) |
| 122 | { |
| 123 | int index = i - MIN_TRANS; |
| 124 | threads[index] = new TransformerThread("Trans"+prettyNum(index,2), i); |
| 125 | } |
| 126 | |
| 127 | ExecuteTransformersThread exec = new ExecuteTransformersThread(); |
| 128 | exec.start(); |
| 129 | for (int i = threads.length - 1; i >= 0; i--) |
| 130 | { |
| 131 | threads[i].start(); |
| 132 | } |
| 133 | |
| 134 | while (!exec.fDone) |
| 135 | { |
| 136 | Thread.currentThread().yield(); |
| 137 | } |
| 138 | assertTrue(finalCheck()); |
| 139 | |
| 140 | if (LOG_TRANSFORMATIONS) { |
| 141 | printTransformers(); |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | /** |
| 146 | * Returns the Instrumentation. |
| 147 | * @return Instrumentation the data type with JPLIS calls |
| 148 | */ |
| 149 | public Instrumentation getInstrumentation() |
| 150 | { |
| 151 | return fInstrumentation; |
| 152 | } |
| 153 | |
| 154 | /** |
| 155 | * Returns the execution thread |
| 156 | * @return ExecuteTransformersThread |
| 157 | */ |
| 158 | protected ExecuteTransformersThread getExecThread() |
| 159 | { |
| 160 | return fExec; |
| 161 | } |
| 162 | |
| 163 | /** |
| 164 | * Sets the execution thread |
| 165 | * @param exec The execution thread to set |
| 166 | */ |
| 167 | protected void setExecThread(ExecuteTransformersThread exec) |
| 168 | { |
| 169 | this.fExec = exec; |
| 170 | } |
| 171 | |
| 172 | protected synchronized void |
| 173 | threadFinished(Thread t) |
| 174 | { |
| 175 | fFinished++; |
| 176 | } |
| 177 | |
| 178 | protected boolean |
| 179 | threadsDone() |
| 180 | { |
| 181 | return fFinished == TOTAL_THREADS; |
| 182 | } |
| 183 | |
| 184 | /** |
| 185 | * Method testCompleted. |
| 186 | * @return boolean |
| 187 | */ |
| 188 | protected boolean |
| 189 | testCompleted() |
| 190 | { |
| 191 | return getExecThread().fDone; |
| 192 | } |
| 193 | |
| 194 | /** |
| 195 | * |
| 196 | */ |
| 197 | protected boolean |
| 198 | finalCheck() |
| 199 | { |
| 200 | if (LOG_TRANSFORMATIONS) { |
| 201 | // log the list |
| 202 | for (int x = 0; x < fCheckedTransformers.size(); x++ ) { |
| 203 | System.out.println(x + "\t\t" + fCheckedTransformers.get(x)); |
| 204 | } |
| 205 | System.out.println(); |
| 206 | System.out.println(); |
| 207 | |
| 208 | // check for multiples |
| 209 | for (int x = 0; x < fCheckedTransformers.size(); x++ ) { |
| 210 | Object current = fCheckedTransformers.get(x); |
| 211 | for ( int y = x + 1; y < fCheckedTransformers.size(); y++) { |
| 212 | Object running = fCheckedTransformers.get(y); |
| 213 | if ( current.equals(running) ) { |
| 214 | System.out.println(x + "\t" + y + " \t" + "FOUND DUPLICATE: " + current); |
| 215 | } |
| 216 | } |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | for (int j = 1; j < fCheckedTransformers.size(); j++) { |
| 221 | ThreadTransformer transformer = (ThreadTransformer)fCheckedTransformers.get(j); |
| 222 | for (int i = 0; i < j; i++) { |
| 223 | ThreadTransformer currTrans = (ThreadTransformer)fCheckedTransformers.get(i); |
| 224 | assertTrue(currTrans + " incorrectly appeared before " + |
| 225 | transformer + " i=" + i + " j=" + j + " size=" + |
| 226 | fCheckedTransformers.size(), |
| 227 | !( |
| 228 | currTrans.getThread().equals(transformer.getThread()) && |
| 229 | currTrans.getIndex() > transformer.getIndex())); |
| 230 | } |
| 231 | } |
| 232 | return true; |
| 233 | } |
| 234 | |
| 235 | /** |
| 236 | * |
| 237 | */ |
| 238 | protected void |
| 239 | setUp() |
| 240 | throws Exception |
| 241 | { |
| 242 | super.setUp(); |
| 243 | |
| 244 | fFinished = 0; |
| 245 | assertTrue(MIN_TRANS < MAX_TRANS); |
| 246 | fInstrumentation = InstrumentationHandoff.getInstrumentationOrThrow(); |
| 247 | } |
| 248 | |
| 249 | /** |
| 250 | * |
| 251 | */ |
| 252 | protected void |
| 253 | tearDown() |
| 254 | throws Exception |
| 255 | { |
| 256 | super.tearDown(); |
| 257 | } |
| 258 | |
| 259 | |
| 260 | |
| 261 | /** |
| 262 | * Method executeTransform. |
| 263 | */ |
| 264 | private void |
| 265 | executeTransform() |
| 266 | { |
| 267 | fCheckedTransformers.clear(); |
| 268 | |
| 269 | try |
| 270 | { |
| 271 | ClassDefinition cd = new ClassDefinition(DummyClass.class, fDummyClassBytes); |
| 272 | getInstrumentation().redefineClasses(new ClassDefinition[]{ cd }); |
| 273 | } |
| 274 | catch (ClassNotFoundException e) |
| 275 | { |
| 276 | fail("Could not find the class: "+DummyClass.class.getName()); |
| 277 | } |
| 278 | catch (UnmodifiableClassException e) |
| 279 | { |
| 280 | fail("Could not modify the class: "+DummyClass.class.getName()); |
| 281 | } |
| 282 | } |
| 283 | |
| 284 | /** |
| 285 | * Method addTransformerToManager. |
| 286 | * @param threadTransformer |
| 287 | */ |
| 288 | private void |
| 289 | addTransformerToManager(ThreadTransformer threadTransformer) |
| 290 | { |
| 291 | getInstrumentation().addTransformer(threadTransformer); |
| 292 | fAddedTransformers.add(threadTransformer); |
| 293 | } |
| 294 | |
| 295 | /** |
| 296 | * Method checkInTransformer. |
| 297 | * @param myClassFileTransformer |
| 298 | */ |
| 299 | private void |
| 300 | checkInTransformer(ThreadTransformer transformer) |
| 301 | { |
| 302 | fCheckedTransformers.add(transformer); |
| 303 | } |
| 304 | |
| 305 | /** |
| 306 | * Method createTransformer. |
| 307 | * @param transformerThread |
| 308 | * @param i |
| 309 | * @return ThreadTransformer |
| 310 | */ |
| 311 | private ThreadTransformer |
| 312 | createTransformer(TransformerThread thread, int index) |
| 313 | { |
| 314 | ThreadTransformer tt = null; |
| 315 | |
| 316 | tt = new ThreadTransformer(thread, index); |
| 317 | |
| 318 | return tt; |
| 319 | } |
| 320 | |
| 321 | |
| 322 | protected class |
| 323 | ExecuteTransformersThread |
| 324 | extends Thread |
| 325 | { |
| 326 | private boolean fDone = false; |
| 327 | |
| 328 | public void |
| 329 | run() |
| 330 | { |
| 331 | while(!threadsDone()) |
| 332 | { |
| 333 | executeTransform(); |
| 334 | } |
| 335 | |
| 336 | // Do a final check for good measure |
| 337 | executeTransform(); |
| 338 | fDone = true; |
| 339 | } |
| 340 | } |
| 341 | |
| 342 | |
| 343 | protected class |
| 344 | TransformerThread |
| 345 | extends Thread |
| 346 | { |
| 347 | private final ThreadTransformer[] fThreadTransformers; |
| 348 | |
| 349 | TransformerThread(String name, int numTransformers) |
| 350 | { |
| 351 | super(name); |
| 352 | |
| 353 | fThreadTransformers = makeTransformers(numTransformers); |
| 354 | } |
| 355 | |
| 356 | /** |
| 357 | * Method makeTransformers. |
| 358 | * @param numTransformers |
| 359 | * @return ThreadTransformer[] |
| 360 | */ |
| 361 | private ThreadTransformer[] |
| 362 | makeTransformers(int numTransformers) |
| 363 | { |
| 364 | ThreadTransformer[] trans = new ThreadTransformer[numTransformers]; |
| 365 | |
| 366 | for (int i = 0; i < trans.length; i++) |
| 367 | { |
| 368 | trans[i] = createTransformer(TransformerThread.this, i); |
| 369 | } |
| 370 | |
| 371 | return trans; |
| 372 | } |
| 373 | |
| 374 | public void |
| 375 | run() |
| 376 | { |
| 377 | for (int i = 0; i < fThreadTransformers.length; i++) |
| 378 | { |
| 379 | addTransformerToManager(fThreadTransformers[i]); |
| 380 | } |
| 381 | threadFinished(TransformerThread.this); |
| 382 | } |
| 383 | } |
| 384 | |
| 385 | /** |
| 386 | * ClassFileTransformer implementation that knows its thread |
| 387 | */ |
| 388 | protected class |
| 389 | ThreadTransformer extends SimpleIdentityTransformer |
| 390 | { |
| 391 | private final String fName; |
| 392 | private final int fIndex; |
| 393 | private final Thread fThread; |
| 394 | |
| 395 | /** |
| 396 | * Constructor for ThreadTransformer. |
| 397 | */ |
| 398 | public ThreadTransformer(Thread thread, int index) { |
| 399 | super(); |
| 400 | fThread = thread; |
| 401 | fIndex = index; |
| 402 | fName = "TT["+fThread.getName()+"]["+prettyNum(fIndex,3)+"]"; |
| 403 | } |
| 404 | |
| 405 | public String toString() |
| 406 | { |
| 407 | return fName; |
| 408 | } |
| 409 | |
| 410 | /** |
| 411 | * |
| 412 | */ |
| 413 | public byte[] |
| 414 | transform( |
| 415 | ClassLoader loader, |
| 416 | String className, |
| 417 | Class<?> classBeingRedefined, |
| 418 | ProtectionDomain domain, |
| 419 | byte[] classfileBuffer) |
| 420 | { |
| 421 | if ( className.equals(TransformerManagementThreadAddTests.this.fDummyClassName) ) { |
| 422 | checkInTransformer(ThreadTransformer.this); |
| 423 | } |
| 424 | return super.transform( loader, |
| 425 | className, |
| 426 | classBeingRedefined, |
| 427 | domain, |
| 428 | classfileBuffer); |
| 429 | } |
| 430 | |
| 431 | /** |
| 432 | * Returns the index. |
| 433 | * @return int |
| 434 | */ |
| 435 | public int getIndex() |
| 436 | { |
| 437 | return fIndex; |
| 438 | } |
| 439 | |
| 440 | /** |
| 441 | * Returns the thread. |
| 442 | * @return Thread |
| 443 | */ |
| 444 | public Thread getThread() |
| 445 | { |
| 446 | return fThread; |
| 447 | } |
| 448 | |
| 449 | } |
| 450 | |
| 451 | /** |
| 452 | * DEBUG STUFF |
| 453 | */ |
| 454 | private int NUM_SWITCHES; |
| 455 | |
| 456 | /** |
| 457 | * Method printTransformers. |
| 458 | */ |
| 459 | protected void printTransformers() |
| 460 | { |
| 461 | NUM_SWITCHES = 0; |
| 462 | Iterator trans = fCheckedTransformers.iterator(); |
| 463 | ThreadTransformer old = null; |
| 464 | StringBuffer buf = new StringBuffer(); |
| 465 | |
| 466 | for (int i = 1; trans.hasNext(); i++) |
| 467 | { |
| 468 | ThreadTransformer t = (ThreadTransformer)trans.next(); |
| 469 | buf.append(t.toString()); |
| 470 | if (old != null) |
| 471 | { |
| 472 | if (!old.getThread().equals(t.getThread())) |
| 473 | { |
| 474 | NUM_SWITCHES++; |
| 475 | buf.append("*"); |
| 476 | } |
| 477 | else |
| 478 | { buf.append(" "); } |
| 479 | } |
| 480 | else |
| 481 | { buf.append(" "); } |
| 482 | |
| 483 | if (i % 5 == 0) |
| 484 | { |
| 485 | buf.append("\n"); |
| 486 | } |
| 487 | else |
| 488 | { buf.append(" "); } |
| 489 | |
| 490 | old = t; |
| 491 | } |
| 492 | System.out.println(buf); |
| 493 | System.out.println("\nNumber of transitions from one thread to another: "+NUM_SWITCHES); |
| 494 | } |
| 495 | |
| 496 | protected String |
| 497 | prettyNum(int n, int numSize) |
| 498 | { |
| 499 | StringBuffer num = new StringBuffer(Integer.toString(n)); |
| 500 | int size = num.length(); |
| 501 | for (int i = 0; i < numSize - size; i++) |
| 502 | { |
| 503 | num.insert(0, "0"); |
| 504 | } |
| 505 | |
| 506 | return num.toString(); |
| 507 | } |
| 508 | /** |
| 509 | * END DEBUG STUFF |
| 510 | */ |
| 511 | |
| 512 | } |