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/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import java.util.concurrent.atomic.AtomicInteger;
public final class DeadReferenceUnsafeTest {
static AtomicInteger nFinalized = new AtomicInteger(0);
private static final int INNER_ITERS = 10;
static int count;
int n = 1;
private static void $noinline$loop() {
DeadReferenceUnsafeTest x;
// The loop allocates INNER_ITERS DeadReferenceUnsafeTest objects.
for (int i = 0; i < INNER_ITERS; ++i) {
// We've allocated i objects so far.
x = new DeadReferenceUnsafeTest();
count += x.n;
// x is dead here.
if (i == 5) {
// Without dead reference elimination, the last object should be kept around,
// and only 5 objects should be relcaimed here.
Main.$noinline$gcAndCheck(nFinalized, 5, "DeadReferenceUnsafe",
"Failed to keep dead reference live in unannotated code!");
}
}
}
private static void reset(int expected_count) {
Runtime.getRuntime().gc();
System.runFinalization();
if (nFinalized.get() != expected_count) {
System.out.println("DeadReferenceUnsafeTest: Wrong number of finalized objects:"
+ nFinalized.get());
}
nFinalized.set(0);
}
protected void finalize() {
nFinalized.incrementAndGet();
}
public static void runTest() {
try {
Main.ensureCompiled(DeadReferenceUnsafeTest.class, "$noinline$loop");
} catch (NoSuchMethodException e) {
System.out.println("Unexpectedly threw " + e);
}
$noinline$loop();
if (count != INNER_ITERS) {
System.out.println("DeadReferenceUnsafeTest: Final count wrong: " + count);
}
reset(INNER_ITERS);
}
}