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test/jdk/java/util/concurrent/tck/JSR166TestCase.java
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8225490: Miscellaneous changes imported from jsr166 CVS 2019-09
Reviewed-by: martin, alanb
@@ -309,16 +309,17 @@
// Instrumentation to debug very rare, but very annoying hung test runs.
static volatile TestCase currentTestCase;
// static volatile int currentRun = 0;
static {
- Runnable checkForWedgedTest = new Runnable() { public void run() {
+ Runnable wedgedTestDetector = new Runnable() { public void run() {
// Avoid spurious reports with enormous runsPerTest.
// A single test case run should never take more than 1 second.
// But let's cap it at the high end too ...
- final int timeoutMinutes =
- Math.min(15, Math.max(runsPerTest / 60, 1));
+ final int timeoutMinutesMin = Math.max(runsPerTest / 60, 1)
+ * Math.max((int) delayFactor, 1);
+ final int timeoutMinutes = Math.min(15, timeoutMinutesMin);
for (TestCase lastTestCase = currentTestCase;;) {
try { MINUTES.sleep(timeoutMinutes); }
catch (InterruptedException unexpected) { break; }
if (lastTestCase == currentTestCase) {
System.err.printf(
@@ -334,11 +335,11 @@
// one stack dump is probably enough; more would be spam
break;
}
lastTestCase = currentTestCase;
}}};
- Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
+ Thread thread = new Thread(wedgedTestDetector, "WedgedTestDetector");
thread.setDaemon(true);
thread.start();
}
// public static String cpuModel() {
@@ -378,11 +379,11 @@
if (elapsedMillis < profileThreshold)
break;
// Never report first run of any test; treat it as a
// warmup run, notably to trigger all needed classloading,
if (i > 0)
- System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
+ System.out.printf("%s: %d%n", toString(), elapsedMillis);
}
}
/**
* Runs all JSR166 unit tests using junit.textui.TestRunner.
@@ -681,10 +682,16 @@
public static long SHORT_DELAY_MS;
public static long SMALL_DELAY_MS;
public static long MEDIUM_DELAY_MS;
public static long LONG_DELAY_MS;
+ /**
+ * A delay significantly longer than LONG_DELAY_MS.
+ * Use this in a thread that is waited for via awaitTermination(Thread).
+ */
+ public static long LONGER_DELAY_MS;
+
private static final long RANDOM_TIMEOUT;
private static final long RANDOM_EXPIRED_TIMEOUT;
private static final TimeUnit RANDOM_TIMEUNIT;
static {
ThreadLocalRandom rnd = ThreadLocalRandom.current();
@@ -709,10 +716,24 @@
* Returns a random non-null TimeUnit.
*/
static TimeUnit randomTimeUnit() { return RANDOM_TIMEUNIT; }
/**
+ * Returns a random boolean; a "coin flip".
+ */
+ static boolean randomBoolean() {
+ return ThreadLocalRandom.current().nextBoolean();
+ }
+
+ /**
+ * Returns a random element from given choices.
+ */
+ <T> T chooseRandomly(T... choices) {
+ return choices[ThreadLocalRandom.current().nextInt(choices.length)];
+ }
+
+ /**
* Returns the shortest timed delay. This can be scaled up for
* slow machines using the jsr166.delay.factor system property,
* or via jtreg's -timeoutFactor: flag.
* http://openjdk.java.net/jtreg/command-help.html
*/
@@ -726,10 +747,11 @@
protected void setDelays() {
SHORT_DELAY_MS = getShortDelay();
SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
LONG_DELAY_MS = SHORT_DELAY_MS * 200;
+ LONGER_DELAY_MS = 2 * LONG_DELAY_MS;
}
private static final long TIMEOUT_DELAY_MS
= (long) (12.0 * Math.cbrt(delayFactor));
@@ -764,12 +786,12 @@
* failure is recorded; subsequent calls to this method from within
* the same test have no effect.
*/
public void threadRecordFailure(Throwable t) {
System.err.println(t);
+ if (threadFailure.compareAndSet(null, t))
dumpTestThreads();
- threadFailure.compareAndSet(null, t);
}
public void setUp() {
setDelays();
}
@@ -1086,10 +1108,43 @@
threadUnexpectedException(ex);
}
}
}
+ /** Returns true if thread info might be useful in a thread dump. */
+ static boolean threadOfInterest(ThreadInfo info) {
+ final String name = info.getThreadName();
+ String lockName;
+ if (name == null)
+ return true;
+ if (name.equals("Signal Dispatcher")
+ || name.equals("WedgedTestDetector"))
+ return false;
+ if (name.equals("Reference Handler")) {
+ // Reference Handler stacktrace changed in JDK-8156500
+ StackTraceElement[] stackTrace; String methodName;
+ if ((stackTrace = info.getStackTrace()) != null
+ && stackTrace.length > 0
+ && (methodName = stackTrace[0].getMethodName()) != null
+ && methodName.equals("waitForReferencePendingList"))
+ return false;
+ // jdk8 Reference Handler stacktrace
+ if ((lockName = info.getLockName()) != null
+ && lockName.startsWith("java.lang.ref"))
+ return false;
+ }
+ if ((name.equals("Finalizer") || name.equals("Common-Cleaner"))
+ && (lockName = info.getLockName()) != null
+ && lockName.startsWith("java.lang.ref"))
+ return false;
+ if (name.startsWith("ForkJoinPool.commonPool-worker")
+ && (lockName = info.getLockName()) != null
+ && lockName.startsWith("java.util.concurrent.ForkJoinPool"))
+ return false;
+ return true;
+ }
+
/**
* A debugging tool to print stack traces of most threads, as jstack does.
* Uninteresting threads are filtered out.
*/
static void dumpTestThreads() {
@@ -1102,27 +1157,13 @@
}
}
ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
System.err.println("------ stacktrace dump start ------");
- for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
- final String name = info.getThreadName();
- String lockName;
- if ("Signal Dispatcher".equals(name))
- continue;
- if ("Reference Handler".equals(name)
- && (lockName = info.getLockName()) != null
- && lockName.startsWith("java.lang.ref.Reference$Lock"))
- continue;
- if ("Finalizer".equals(name)
- && (lockName = info.getLockName()) != null
- && lockName.startsWith("java.lang.ref.ReferenceQueue$Lock"))
- continue;
- if ("checkForWedgedTest".equals(name))
- continue;
+ for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true))
+ if (threadOfInterest(info))
System.err.print(info);
- }
System.err.println("------ stacktrace dump end ------");
if (sm != null) System.setSecurityManager(sm);
}
@@ -1391,31 +1432,32 @@
Callable<Boolean> waitingForGodot) {
waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, waitingForGodot);
}
/**
+ * Spin-waits up to LONG_DELAY_MS milliseconds for the current thread to
+ * be interrupted. Clears the interrupt status before returning.
+ */
+ void awaitInterrupted() {
+ for (long startTime = 0L; !Thread.interrupted(); ) {
+ if (startTime == 0L)
+ startTime = System.nanoTime();
+ else if (millisElapsedSince(startTime) > LONG_DELAY_MS)
+ fail("timed out waiting for thread interrupt");
+ Thread.yield();
+ }
+ }
+
+ /**
* Returns the number of milliseconds since time given by
* startNanoTime, which must have been previously returned from a
* call to {@link System#nanoTime()}.
*/
static long millisElapsedSince(long startNanoTime) {
return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
}
-// void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
-// long startTime = System.nanoTime();
-// try {
-// r.run();
-// } catch (Throwable fail) { threadUnexpectedException(fail); }
-// if (millisElapsedSince(startTime) > timeoutMillis/2)
-// throw new AssertionError("did not return promptly");
-// }
-
-// void assertTerminatesPromptly(Runnable r) {
-// assertTerminatesPromptly(LONG_DELAY_MS/2, r);
-// }
-
/**
* Checks that timed f.get() returns the expected value, and does not
* wait for the timeout to elapse before returning.
*/
<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
@@ -1446,19 +1488,25 @@
/**
* Waits for the specified time (in milliseconds) for the thread
* to terminate (using {@link Thread#join(long)}), else interrupts
* the thread (in the hope that it may terminate later) and fails.
*/
- void awaitTermination(Thread t, long timeoutMillis) {
+ void awaitTermination(Thread thread, long timeoutMillis) {
try {
- t.join(timeoutMillis);
+ thread.join(timeoutMillis);
} catch (InterruptedException fail) {
threadUnexpectedException(fail);
+ }
+ if (thread.getState() != Thread.State.TERMINATED) {
+ String detail = String.format(
+ "timed out waiting for thread to terminate, thread=%s, state=%s" ,
+ thread, thread.getState());
+ try {
+ threadFail(detail);
} finally {
- if (t.getState() != Thread.State.TERMINATED) {
- t.interrupt();
- threadFail("timed out waiting for thread to terminate");
+ // Interrupt thread __after__ having reported its stack trace
+ thread.interrupt();
}
}
}
/**
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