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| 1 | /* | ||
| 2 | * Copyright (c) 2003, 2011, Oracle and/or its affiliates. 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. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package sun.management; | ||
| 27 | |||
| 28 | import java.lang.management.ManagementFactory; | ||
| 29 | |||
| 30 | import java.lang.management.ThreadInfo; | ||
| 31 | |||
| 32 | import javax.management.ObjectName; | ||
| 33 | |||
| 34 | /** | ||
| 35 | * Implementation class for the thread subsystem. | ||
| 36 | * Standard and committed hotspot-specific metrics if any. | ||
| 37 | * | ||
| 38 | * ManagementFactory.getThreadMXBean() returns an instance | ||
| 39 | * of this class. | ||
| 40 | */ | ||
| 41 | class ThreadImpl implements com.sun.management.ThreadMXBean { | ||
| 42 | |||
| 43 | private final VMManagement jvm; | ||
| 44 | |||
| 45 | // default for thread contention monitoring is disabled. | ||
| 46 | private boolean contentionMonitoringEnabled = false; | ||
| 47 | private boolean cpuTimeEnabled; | ||
| 48 | private boolean allocatedMemoryEnabled; | ||
| 49 | |||
| 50 | /** | ||
| 51 | * Constructor of ThreadImpl class. | ||
| 52 | */ | ||
| 53 | ThreadImpl(VMManagement vm) { | ||
| 54 | this.jvm = vm; | ||
| 55 | this.cpuTimeEnabled = jvm.isThreadCpuTimeEnabled(); | ||
| 56 | this.allocatedMemoryEnabled = jvm.isThreadAllocatedMemoryEnabled(); | ||
| 57 | } | ||
| 58 | |||
| 59 | public int getThreadCount() { | ||
| 60 | return jvm.getLiveThreadCount(); | ||
| 61 | } | ||
| 62 | |||
| 63 | public int getPeakThreadCount() { | ||
| 64 | return jvm.getPeakThreadCount(); | ||
| 65 | } | ||
| 66 | |||
| 67 | public long getTotalStartedThreadCount() { | ||
| 68 | return jvm.getTotalThreadCount(); | ||
| 69 | } | ||
| 70 | |||
| 71 | public int getDaemonThreadCount() { | ||
| 72 | return jvm.getDaemonThreadCount(); | ||
| 73 | } | ||
| 74 | |||
| 75 | public boolean isThreadContentionMonitoringSupported() { | ||
| 76 | return jvm.isThreadContentionMonitoringSupported(); | ||
| 77 | } | ||
| 78 | |||
| 79 | public synchronized boolean isThreadContentionMonitoringEnabled() { | ||
| 80 | if (!isThreadContentionMonitoringSupported()) { | ||
| 81 | throw new UnsupportedOperationException( | ||
| 82 | "Thread contention monitoring is not supported."); | ||
| 83 | } | ||
| 84 | return contentionMonitoringEnabled; | ||
| 85 | } | ||
| 86 | |||
| 87 | public boolean isThreadCpuTimeSupported() { | ||
| 88 | return jvm.isOtherThreadCpuTimeSupported(); | ||
| 89 | } | ||
| 90 | |||
| 91 | public boolean isCurrentThreadCpuTimeSupported() { | ||
| 92 | return jvm.isCurrentThreadCpuTimeSupported(); | ||
| 93 | } | ||
| 94 | |||
| 95 | public boolean isThreadAllocatedMemorySupported() { | ||
| 96 | return jvm.isThreadAllocatedMemorySupported(); | ||
| 97 | } | ||
| 98 | |||
| 99 | public boolean isThreadCpuTimeEnabled() { | ||
| 100 | if (!isThreadCpuTimeSupported() && | ||
| 101 | !isCurrentThreadCpuTimeSupported()) { | ||
| 102 | throw new UnsupportedOperationException( | ||
| 103 | "Thread CPU time measurement is not supported"); | ||
| 104 | } | ||
| 105 | return cpuTimeEnabled; | ||
| 106 | } | ||
| 107 | |||
| 108 | public boolean isThreadAllocatedMemoryEnabled() { | ||
| 109 | if (!isThreadAllocatedMemorySupported()) { | ||
| 110 | throw new UnsupportedOperationException( | ||
| 111 | "Thread allocated memory measurement is not supported"); | ||
| 112 | } | ||
| 113 | return allocatedMemoryEnabled; | ||
| 114 | } | ||
| 115 | |||
| 116 | public long[] getAllThreadIds() { | ||
| 117 | Util.checkMonitorAccess(); | ||
| 118 | |||
| 119 | Thread[] threads = getThreads(); | ||
| 120 | int length = threads.length; | ||
| 121 | long[] ids = new long[length]; | ||
| 122 | for (int i = 0; i < length; i++) { | ||
| 123 | Thread t = threads[i]; | ||
| 124 | ids[i] = t.getId(); | ||
| 125 | } | ||
| 126 | return ids; | ||
| 127 | } | ||
| 128 | |||
| 129 | public ThreadInfo getThreadInfo(long id) { | ||
| 130 | long[] ids = new long[1]; | ||
| 131 | ids[0] = id; | ||
| 132 | final ThreadInfo[] infos = getThreadInfo(ids, 0); | ||
| 133 | return infos[0]; | ||
| 134 | } | ||
| 135 | |||
| 136 | public ThreadInfo getThreadInfo(long id, int maxDepth) { | ||
| 137 | long[] ids = new long[1]; | ||
| 138 | ids[0] = id; | ||
| 139 | final ThreadInfo[] infos = getThreadInfo(ids, maxDepth); | ||
| 140 | return infos[0]; | ||
| 141 | } | ||
| 142 | |||
| 143 | public ThreadInfo[] getThreadInfo(long[] ids) { | ||
| 144 | return getThreadInfo(ids, 0); | ||
| 145 | } | ||
| 146 | |||
| 147 | private void verifyThreadIds(long[] ids) { | ||
| 148 | if (ids == null) { | ||
| 149 | throw new NullPointerException("Null ids parameter."); | ||
| 150 | } | ||
| 151 | |||
| 152 | for (int i = 0; i < ids.length; i++) { | ||
| 153 | if (ids[i] <= 0) { | ||
| 154 | throw new IllegalArgumentException( | ||
| 155 | "Invalid thread ID parameter: " + ids[i]); | ||
| 156 | } | ||
| 157 | } | ||
| 158 | } | ||
| 159 | |||
| 160 | public ThreadInfo[] getThreadInfo(long[] ids, int maxDepth) { | ||
| 161 | verifyThreadIds(ids); | ||
| 162 | |||
| 163 | if (maxDepth < 0) { | ||
| 164 | throw new IllegalArgumentException( | ||
| 165 | "Invalid maxDepth parameter: " + maxDepth); | ||
| 166 | } | ||
| 167 | |||
| 168 | Util.checkMonitorAccess(); | ||
| 169 | |||
| 170 | ThreadInfo[] infos = new ThreadInfo[ids.length]; // nulls | ||
| 171 | if (maxDepth == Integer.MAX_VALUE) { | ||
| 172 | getThreadInfo1(ids, -1, infos); | ||
| 173 | } else { | ||
| 174 | getThreadInfo1(ids, maxDepth, infos); | ||
| 175 | } | ||
| 176 | return infos; | ||
| 177 | } | ||
| 178 | |||
| 179 | public void setThreadContentionMonitoringEnabled(boolean enable) { | ||
| 180 | if (!isThreadContentionMonitoringSupported()) { | ||
| 181 | throw new UnsupportedOperationException( | ||
| 182 | "Thread contention monitoring is not supported"); | ||
| 183 | } | ||
| 184 | |||
| 185 | Util.checkControlAccess(); | ||
| 186 | |||
| 187 | synchronized (this) { | ||
| 188 | if (contentionMonitoringEnabled != enable) { | ||
| 189 | if (enable) { | ||
| 190 | // if reeabled, reset contention time statistics | ||
| 191 | // for all threads | ||
| 192 | resetContentionTimes0(0); | ||
| 193 | } | ||
| 194 | |||
| 195 | // update the VM of the state change | ||
| 196 | setThreadContentionMonitoringEnabled0(enable); | ||
| 197 | |||
| 198 | contentionMonitoringEnabled = enable; | ||
| 199 | } | ||
| 200 | } | ||
| 201 | } | ||
| 202 | |||
| 203 | private boolean verifyCurrentThreadCpuTime() { | ||
| 204 | // check if Thread CPU time measurement is supported. | ||
| 205 | if (!isCurrentThreadCpuTimeSupported()) { | ||
| 206 | throw new UnsupportedOperationException( | ||
| 207 | "Current thread CPU time measurement is not supported."); | ||
| 208 | } | ||
| 209 | return isThreadCpuTimeEnabled(); | ||
| 210 | } | ||
| 211 | |||
| 212 | public long getCurrentThreadCpuTime() { | ||
| 213 | if (verifyCurrentThreadCpuTime()) { | ||
| 214 | return getThreadTotalCpuTime0(0); | ||
| 215 | } | ||
| 216 | return -1; | ||
| 217 | } | ||
| 218 | |||
| 219 | public long getThreadCpuTime(long id) { | ||
| 220 | long[] ids = new long[1]; | ||
| 221 | ids[0] = id; | ||
| 222 | final long[] times = getThreadCpuTime(ids); | ||
| 223 | return times[0]; | ||
| 224 | } | ||
| 225 | |||
| 226 | private boolean verifyThreadCpuTime(long[] ids) { | ||
| 227 | verifyThreadIds(ids); | ||
| 228 | |||
| 229 | // check if Thread CPU time measurement is supported. | ||
| 230 | if (!isThreadCpuTimeSupported() && | ||
| 231 | !isCurrentThreadCpuTimeSupported()) { | ||
| 232 | throw new UnsupportedOperationException( | ||
| 233 | "Thread CPU time measurement is not supported."); | ||
| 234 | } | ||
| 235 | |||
| 236 | if (!isThreadCpuTimeSupported()) { | ||
| 237 | // support current thread only | ||
| 238 | for (int i = 0; i < ids.length; i++) { | ||
| 239 | if (ids[i] != Thread.currentThread().getId()) { | ||
| 240 | throw new UnsupportedOperationException( | ||
| 241 | "Thread CPU time measurement is only supported" + | ||
| 242 | " for the current thread."); | ||
| 243 | } | ||
| 244 | } | ||
| 245 | } | ||
| 246 | |||
| 247 | return isThreadCpuTimeEnabled(); | ||
| 248 | } | ||
| 249 | |||
| 250 | public long[] getThreadCpuTime(long[] ids) { | ||
| 251 | boolean verified = verifyThreadCpuTime(ids); | ||
| 252 | |||
| 253 | int length = ids.length; | ||
| 254 | long[] times = new long[length]; | ||
| 255 | java.util.Arrays.fill(times, -1); | ||
| 256 | |||
| 257 | if (verified) { | ||
| 258 | if (length == 1) { | ||
| 259 | long id = ids[0]; | ||
| 260 | if (id == Thread.currentThread().getId()) { | ||
| 261 | id = 0; | ||
| 262 | } | ||
| 263 | times[0] = getThreadTotalCpuTime0(id); | ||
| 264 | } else { | ||
| 265 | getThreadTotalCpuTime1(ids, times); | ||
| 266 | } | ||
| 267 | } | ||
| 268 | return times; | ||
| 269 | } | ||
| 270 | |||
| 271 | public long getCurrentThreadUserTime() { | ||
| 272 | if (verifyCurrentThreadCpuTime()) { | ||
| 273 | return getThreadUserCpuTime0(0); | ||
| 274 | } | ||
| 275 | return -1; | ||
| 276 | } | ||
| 277 | |||
| 278 | public long getThreadUserTime(long id) { | ||
| 279 | long[] ids = new long[1]; | ||
| 280 | ids[0] = id; | ||
| 281 | final long[] times = getThreadUserTime(ids); | ||
| 282 | return times[0]; | ||
| 283 | } | ||
| 284 | |||
| 285 | public long[] getThreadUserTime(long[] ids) { | ||
| 286 | boolean verified = verifyThreadCpuTime(ids); | ||
| 287 | |||
| 288 | int length = ids.length; | ||
| 289 | long[] times = new long[length]; | ||
| 290 | java.util.Arrays.fill(times, -1); | ||
| 291 | |||
| 292 | if (verified) { | ||
| 293 | if (length == 1) { | ||
| 294 | long id = ids[0]; | ||
| 295 | if (id == Thread.currentThread().getId()) { | ||
| 296 | id = 0; | ||
| 297 | } | ||
| 298 | times[0] = getThreadUserCpuTime0(id); | ||
| 299 | } else { | ||
| 300 | getThreadUserCpuTime1(ids, times); | ||
| 301 | } | ||
| 302 | } | ||
| 303 | return times; | ||
| 304 | } | ||
| 305 | |||
| 306 | public void setThreadCpuTimeEnabled(boolean enable) { | ||
| 307 | if (!isThreadCpuTimeSupported() && | ||
| 308 | !isCurrentThreadCpuTimeSupported()) { | ||
| 309 | throw new UnsupportedOperationException( | ||
| 310 | "Thread CPU time measurement is not supported"); | ||
| 311 | } | ||
| 312 | |||
| 313 | Util.checkControlAccess(); | ||
| 314 | synchronized (this) { | ||
| 315 | if (cpuTimeEnabled != enable) { | ||
| 316 | // notify VM of the state change | ||
| 317 | setThreadCpuTimeEnabled0(enable); | ||
| 318 | cpuTimeEnabled = enable; | ||
| 319 | } | ||
| 320 | } | ||
| 321 | } | ||
| 322 | |||
| 323 | public long getThreadAllocatedBytes(long id) { | ||
| 324 | long[] ids = new long[1]; | ||
| 325 | ids[0] = id; | ||
| 326 | final long[] sizes = getThreadAllocatedBytes(ids); | ||
| 327 | return sizes[0]; | ||
| 328 | } | ||
| 329 | |||
| 330 | private boolean verifyThreadAllocatedMemory(long[] ids) { | ||
| 331 | verifyThreadIds(ids); | ||
| 332 | |||
| 333 | // check if Thread allocated memory measurement is supported. | ||
| 334 | if (!isThreadAllocatedMemorySupported()) { | ||
| 335 | throw new UnsupportedOperationException( | ||
| 336 | "Thread allocated memory measurement is not supported."); | ||
| 337 | } | ||
| 338 | |||
| 339 | return isThreadAllocatedMemoryEnabled(); | ||
| 340 | } | ||
| 341 | |||
| 342 | public long[] getThreadAllocatedBytes(long[] ids) { | ||
| 343 | boolean verified = verifyThreadAllocatedMemory(ids); | ||
| 344 | |||
| 345 | long[] sizes = new long[ids.length]; | ||
| 346 | java.util.Arrays.fill(sizes, -1); | ||
| 347 | |||
| 348 | if (verified) { | ||
| 349 | getThreadAllocatedMemory1(ids, sizes); | ||
| 350 | } | ||
| 351 | return sizes; | ||
| 352 | } | ||
| 353 | |||
| 354 | public void setThreadAllocatedMemoryEnabled(boolean enable) { | ||
| 355 | if (!isThreadAllocatedMemorySupported()) { | ||
| 356 | throw new UnsupportedOperationException( | ||
| 357 | "Thread allocated memory measurement is not supported."); | ||
| 358 | } | ||
| 359 | |||
| 360 | Util.checkControlAccess(); | ||
| 361 | synchronized (this) { | ||
| 362 | if (allocatedMemoryEnabled != enable) { | ||
| 363 | // notify VM of the state change | ||
| 364 | setThreadAllocatedMemoryEnabled0(enable); | ||
| 365 | allocatedMemoryEnabled = enable; | ||
| 366 | } | ||
| 367 | } | ||
| 368 | } | ||
| 369 | |||
| 370 | public long[] findMonitorDeadlockedThreads() { | ||
| 371 | Util.checkMonitorAccess(); | ||
| 372 | |||
| 373 | Thread[] threads = findMonitorDeadlockedThreads0(); | ||
| 374 | if (threads == null) { | ||
| 375 | return null; | ||
| 376 | } | ||
| 377 | |||
| 378 | long[] ids = new long[threads.length]; | ||
| 379 | for (int i = 0; i < threads.length; i++) { | ||
| 380 | Thread t = threads[i]; | ||
| 381 | ids[i] = t.getId(); | ||
| 382 | } | ||
| 383 | return ids; | ||
| 384 | } | ||
| 385 | |||
| 386 | public long[] findDeadlockedThreads() { | ||
| 387 | if (!isSynchronizerUsageSupported()) { | ||
| 388 | throw new UnsupportedOperationException( | ||
| 389 | "Monitoring of Synchronizer Usage is not supported."); | ||
| 390 | } | ||
| 391 | |||
| 392 | Util.checkMonitorAccess(); | ||
| 393 | |||
| 394 | Thread[] threads = findDeadlockedThreads0(); | ||
| 395 | if (threads == null) { | ||
| 396 | return null; | ||
| 397 | } | ||
| 398 | |||
| 399 | long[] ids = new long[threads.length]; | ||
| 400 | for (int i = 0; i < threads.length; i++) { | ||
| 401 | Thread t = threads[i]; | ||
| 402 | ids[i] = t.getId(); | ||
| 403 | } | ||
| 404 | return ids; | ||
| 405 | } | ||
| 406 | |||
| 407 | public void resetPeakThreadCount() { | ||
| 408 | Util.checkControlAccess(); | ||
| 409 | resetPeakThreadCount0(); | ||
| 410 | } | ||
| 411 | |||
| 412 | public boolean isObjectMonitorUsageSupported() { | ||
| 413 | return jvm.isObjectMonitorUsageSupported(); | ||
| 414 | } | ||
| 415 | |||
| 416 | public boolean isSynchronizerUsageSupported() { | ||
| 417 | return jvm.isSynchronizerUsageSupported(); | ||
| 418 | } | ||
| 419 | |||
| 420 | private void verifyDumpThreads(boolean lockedMonitors, | ||
| 421 | boolean lockedSynchronizers) { | ||
| 422 | if (lockedMonitors && !isObjectMonitorUsageSupported()) { | ||
| 423 | throw new UnsupportedOperationException( | ||
| 424 | "Monitoring of Object Monitor Usage is not supported."); | ||
| 425 | } | ||
| 426 | |||
| 427 | if (lockedSynchronizers && !isSynchronizerUsageSupported()) { | ||
| 428 | throw new UnsupportedOperationException( | ||
| 429 | "Monitoring of Synchronizer Usage is not supported."); | ||
| 430 | } | ||
| 431 | |||
| 432 | Util.checkMonitorAccess(); | ||
| 433 | } | ||
| 434 | |||
| 435 | public ThreadInfo[] getThreadInfo(long[] ids, | ||
| 436 | boolean lockedMonitors, | ||
| 437 | boolean lockedSynchronizers) { | ||
| 438 | verifyThreadIds(ids); | ||
| 439 | verifyDumpThreads(lockedMonitors, lockedSynchronizers); | ||
| 440 | return dumpThreads0(ids, lockedMonitors, lockedSynchronizers); | ||
| 441 | } | ||
| 442 | |||
| 443 | public ThreadInfo[] dumpAllThreads(boolean lockedMonitors, | ||
| 444 | boolean lockedSynchronizers) { | ||
| 445 | verifyDumpThreads(lockedMonitors, lockedSynchronizers); | ||
| 446 | return dumpThreads0(null, lockedMonitors, lockedSynchronizers); | ||
| 447 | } | ||
| 448 | |||
| 449 | // VM support where maxDepth == -1 to request entire stack dump | ||
| 450 | private static native Thread[] getThreads(); | ||
| 451 | private static native void getThreadInfo1(long[] ids, | ||
| 452 | int maxDepth, | ||
| 453 | ThreadInfo[] result); | ||
| 454 | private static native long getThreadTotalCpuTime0(long id); | ||
| 455 | private static native void getThreadTotalCpuTime1(long[] ids, long[] result); | ||
| 456 | private static native long getThreadUserCpuTime0(long id); | ||
| 457 | private static native void getThreadUserCpuTime1(long[] ids, long[] result); | ||
| 458 | private static native void getThreadAllocatedMemory1(long[] ids, long[] result); | ||
| 459 | private static native void setThreadCpuTimeEnabled0(boolean enable); | ||
| 460 | private static native void setThreadAllocatedMemoryEnabled0(boolean enable); | ||
| 461 | private static native void setThreadContentionMonitoringEnabled0(boolean enable); | ||
| 462 | private static native Thread[] findMonitorDeadlockedThreads0(); | ||
| 463 | private static native Thread[] findDeadlockedThreads0(); | ||
| 464 | private static native void resetPeakThreadCount0(); | ||
| 465 | private static native ThreadInfo[] dumpThreads0(long[] ids, | ||
| 466 | boolean lockedMonitors, | ||
| 467 | boolean lockedSynchronizers); | ||
| 468 | |||
| 469 | // tid == 0 to reset contention times for all threads | ||
| 470 | private static native void resetContentionTimes0(long tid); | ||
| 471 | |||
| 472 | public ObjectName getObjectName() { | ||
| 473 | return Util.newObjectName(ManagementFactory.THREAD_MXBEAN_NAME); | ||
| 474 | } | ||
| 475 | |||
| 476 | } | ||