88 lines
2.8 KiB
Java
88 lines
2.8 KiB
Java
/*
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* Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 8337660
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* @summary Test that C2 does not remove blocks with BoxLock nodes that are
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* otherwise empty.
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* @run main/othervm -Xbatch -XX:LockingMode=1
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* -XX:CompileOnly=compiler.locks.TestSynchronizeWithEmptyBlock::*
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* compiler.locks.TestSynchronizeWithEmptyBlock
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* @run main/othervm -Xbatch
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* -XX:CompileOnly=compiler.locks.TestSynchronizeWithEmptyBlock::*
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* compiler.locks.TestSynchronizeWithEmptyBlock
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*/
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package compiler.locks;
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public class TestSynchronizeWithEmptyBlock {
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static int c;
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static final Object obj = new Object();
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static void test1() {
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synchronized (TestSynchronizeWithEmptyBlock.class) {
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int i = 0;
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while (i < 1000) {
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i++;
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if (i < 5);
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}
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}
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synchronized (TestSynchronizeWithEmptyBlock.class) {
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int i = 0;
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do {
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i++;
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if (i < 4) {
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boolean p = true;
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int j = 0;
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do {
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j++;
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if (p) {
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c++;
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}
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} while (j < 100);
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}
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} while (i < 1000);
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}
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}
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static void test2() {
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synchronized (obj) {
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for (long i = 0; i < 1_000_000_000_000L; i+=6_500_000_000L) {}
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}
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synchronized (obj) {
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for (long i = 0; i < 1_000_000_000_000L; i+=6_500_000_000L) {}
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}
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}
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public static void main(String[] args) {
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for (int i = 0; i < 10_000; i++) {
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test1();
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}
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for (int i = 0; i < 10_000; i++) {
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test2();
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}
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}
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}
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