| 12 |
|
import java.util.Arrays; |
| 13 |
|
import java.util.Collection; |
| 14 |
|
import java.util.HashSet; |
| 15 |
– |
import java.util.concurrent.ThreadLocalRandom; |
| 15 |
|
import java.util.concurrent.locks.AbstractQueuedLongSynchronizer; |
| 16 |
|
import java.util.concurrent.locks.AbstractQueuedLongSynchronizer.ConditionObject; |
| 17 |
|
|
| 1258 |
|
/** |
| 1259 |
|
* Tests scenario for |
| 1260 |
|
* JDK-8191937: Lost interrupt in AbstractQueuedSynchronizer when tryAcquire methods throw |
| 1261 |
+ |
* ant -Djsr166.tckTestClass=AbstractQueuedLongSynchronizerTest -Djsr166.methodFilter=testInterruptedFailingAcquire -Djsr166.runsPerTest=10000 tck |
| 1262 |
|
*/ |
| 1263 |
< |
public void testInterruptedFailingAcquire() throws InterruptedException { |
| 1264 |
< |
final RuntimeException ex = new RuntimeException(); |
| 1263 |
> |
public void testInterruptedFailingAcquire() throws Throwable { |
| 1264 |
> |
class PleaseThrow extends RuntimeException {} |
| 1265 |
> |
final PleaseThrow ex = new PleaseThrow(); |
| 1266 |
|
|
| 1267 |
|
// A synchronizer only offering a choice of failure modes |
| 1268 |
|
class Sync extends AbstractQueuedLongSynchronizer { |
| 1269 |
< |
boolean pleaseThrow; |
| 1269 |
> |
volatile boolean pleaseThrow; |
| 1270 |
|
@Override protected boolean tryAcquire(long ignored) { |
| 1271 |
|
if (pleaseThrow) throw ex; |
| 1272 |
|
return false; |
| 1284 |
|
} |
| 1285 |
|
|
| 1286 |
|
final Sync s = new Sync(); |
| 1287 |
< |
|
| 1287 |
> |
final boolean acquireInterruptibly = randomBoolean(); |
| 1288 |
> |
final Action[] uninterruptibleAcquireActions = { |
| 1289 |
> |
() -> s.acquire(1), |
| 1290 |
> |
() -> s.acquireShared(1), |
| 1291 |
> |
}; |
| 1292 |
> |
final long nanosTimeout = MILLISECONDS.toNanos(2 * LONG_DELAY_MS); |
| 1293 |
> |
final Action[] interruptibleAcquireActions = { |
| 1294 |
> |
() -> s.acquireInterruptibly(1), |
| 1295 |
> |
() -> s.acquireSharedInterruptibly(1), |
| 1296 |
> |
() -> s.tryAcquireNanos(1, nanosTimeout), |
| 1297 |
> |
() -> s.tryAcquireSharedNanos(1, nanosTimeout), |
| 1298 |
> |
}; |
| 1299 |
> |
final Action[] releaseActions = { |
| 1300 |
> |
() -> s.release(1), |
| 1301 |
> |
() -> s.releaseShared(1), |
| 1302 |
> |
}; |
| 1303 |
> |
final Action acquireAction = acquireInterruptibly |
| 1304 |
> |
? chooseRandomly(interruptibleAcquireActions) |
| 1305 |
> |
: chooseRandomly(uninterruptibleAcquireActions); |
| 1306 |
> |
final Action releaseAction |
| 1307 |
> |
= chooseRandomly(releaseActions); |
| 1308 |
> |
|
| 1309 |
> |
// From os_posix.cpp: |
| 1310 |
> |
// |
| 1311 |
> |
// NOTE that since there is no "lock" around the interrupt and |
| 1312 |
> |
// is_interrupted operations, there is the possibility that the |
| 1313 |
> |
// interrupted flag (in osThread) will be "false" but that the |
| 1314 |
> |
// low-level events will be in the signaled state. This is |
| 1315 |
> |
// intentional. The effect of this is that Object.wait() and |
| 1316 |
> |
// LockSupport.park() will appear to have a spurious wakeup, which |
| 1317 |
> |
// is allowed and not harmful, and the possibility is so rare that |
| 1318 |
> |
// it is not worth the added complexity to add yet another lock. |
| 1319 |
|
final Thread thread = newStartedThread(new CheckedRunnable() { |
| 1320 |
< |
public void realRun() { |
| 1320 |
> |
public void realRun() throws Throwable { |
| 1321 |
|
try { |
| 1322 |
< |
if (randomBoolean()) |
| 1291 |
< |
s.acquire(1); |
| 1292 |
< |
else |
| 1293 |
< |
s.acquireShared(1); |
| 1322 |
> |
acquireAction.run(); |
| 1323 |
|
shouldThrow(); |
| 1324 |
< |
} catch (Throwable t) { |
| 1325 |
< |
assertSame(ex, t); |
| 1326 |
< |
assertTrue(Thread.interrupted()); |
| 1324 |
> |
} catch (InterruptedException possible) { |
| 1325 |
> |
assertTrue(acquireInterruptibly); |
| 1326 |
> |
assertFalse(Thread.interrupted()); |
| 1327 |
> |
} catch (PleaseThrow possible) { |
| 1328 |
> |
awaitInterrupted(); |
| 1329 |
|
} |
| 1330 |
|
}}); |
| 1331 |
< |
waitForThreadToEnterWaitState(thread); |
| 1332 |
< |
assertSame(thread, s.getFirstQueuedThread()); |
| 1333 |
< |
assertTrue(s.hasQueuedPredecessors()); |
| 1334 |
< |
assertTrue(s.hasQueuedThreads()); |
| 1335 |
< |
assertEquals(1, s.getQueueLength()); |
| 1331 |
> |
for (long startTime = 0L;; ) { |
| 1332 |
> |
waitForThreadToEnterWaitState(thread); |
| 1333 |
> |
if (s.getFirstQueuedThread() == thread |
| 1334 |
> |
&& s.hasQueuedPredecessors() |
| 1335 |
> |
&& s.hasQueuedThreads() |
| 1336 |
> |
&& s.getQueueLength() == 1 |
| 1337 |
> |
&& s.hasContended()) |
| 1338 |
> |
break; |
| 1339 |
> |
if (startTime == 0L) |
| 1340 |
> |
startTime = System.nanoTime(); |
| 1341 |
> |
else if (millisElapsedSince(startTime) > LONG_DELAY_MS) |
| 1342 |
> |
fail("timed out waiting for AQS state: " |
| 1343 |
> |
+ "thread state=" + thread.getState() |
| 1344 |
> |
+ ", queued threads=" + s.getQueuedThreads()); |
| 1345 |
> |
Thread.yield(); |
| 1346 |
> |
} |
| 1347 |
|
|
| 1348 |
|
s.pleaseThrow = true; |
| 1349 |
< |
thread.interrupt(); |
| 1350 |
< |
s.release(1); |
| 1349 |
> |
// release and interrupt, in random order |
| 1350 |
> |
if (randomBoolean()) { |
| 1351 |
> |
thread.interrupt(); |
| 1352 |
> |
releaseAction.run(); |
| 1353 |
> |
} else { |
| 1354 |
> |
releaseAction.run(); |
| 1355 |
> |
thread.interrupt(); |
| 1356 |
> |
} |
| 1357 |
|
awaitTermination(thread); |
| 1358 |
+ |
|
| 1359 |
+ |
assertNull(s.getFirstQueuedThread()); |
| 1360 |
+ |
assertFalse(s.hasQueuedPredecessors()); |
| 1361 |
+ |
assertFalse(s.hasQueuedThreads()); |
| 1362 |
+ |
assertEquals(0, s.getQueueLength()); |
| 1363 |
+ |
assertTrue(s.getQueuedThreads().isEmpty()); |
| 1364 |
+ |
assertTrue(s.hasContended()); |
| 1365 |
|
} |
| 1366 |
|
|
| 1367 |
|
} |
