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8290264: java/util/concurrent/locks/Lock/OOMEInAQS.java fails with "exit code: 0"

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Reviewed-by: dholmes, alanb, dcubed
This commit is contained in:
Doug Lea 2022-07-14 19:53:31 +00:00
parent 3ad3950560
commit 890bcedd49
1 changed files with 19 additions and 5 deletions

24
test/jdk/java/util/concurrent/locks/Lock/OOMEInAQS.java

@ -49,18 +49,24 @@ public class OOMEInAQS extends Thread {
static final Condition condition = mainLock.newCondition();
static final CountDownLatch started = new CountDownLatch(1);
static final CountDownLatch filled = new CountDownLatch(1);
static final CountDownLatch canFill = new CountDownLatch(NTHREADS);
static volatile Object data;
static volatile Throwable exception;
static int turn;
/**
* For each of NTHREADS threads, REPS times: Take turns
* executing. Introduce OOM using fillHeap during runs.
* executing. Introduce OOM using fillHeap during runs. In
* addition to testing AQS, the CountDownLatches ensure that
* methods execute at least once before OutOfMemory occurs, to
* avoid uncontrollable impact of OOME during class-loading.
*/
public static void main(String[] args) throws Throwable {
OOMEInAQS[] threads = new OOMEInAQS[NTHREADS];
for (int i = 0; i < NTHREADS; ++i)
(threads[i] = new OOMEInAQS(i)).start();
started.countDown();
canFill.await();
long t0 = System.nanoTime();
data = fillHeap();
filled.countDown();
@ -69,6 +75,9 @@ public class OOMEInAQS extends Thread {
threads[i].join();
data = null; // free heap before reporting and terminating
System.gc();
Throwable ex = exception;
if (ex != null)
throw ex;
System.out.println(
"fillHeap time: " + (t1 - t0) / 1000_000 +
" millis, whole test time: " + (System.nanoTime() - t0) / 1000_000 +
@ -89,8 +98,8 @@ public class OOMEInAQS extends Thread {
try {
started.await();
for (int i = 0; i < NREPS; i++) {
lock.lock();
try {
lock.lock();
while (turn != id)
cond.await();
turn = nextId;
@ -98,12 +107,17 @@ public class OOMEInAQS extends Thread {
} finally {
lock.unlock();
}
if (i == 2) // Subsequent AQS methods encounter OOME
if (i == 2) { // Subsequent AQS methods encounter OOME
canFill.countDown();
filled.await();
}
}
} catch (Throwable ex) { // Could be InterruptedExeption or OOME
data = null;
System.exit(0); // avoid getting stuck trying to recover
System.gc(); // avoid getting stuck while exiting
} catch (Throwable ex) {
data = null;
System.gc(); // avoid nested OOME
exception = ex;
}
}