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