1 /* 2 * Copyright (c) 2018, Red Hat, Inc. All rights reserved. 3 * 4 * This code is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License version 2 only, as 6 * published by the Free Software Foundation. 7 * 8 * This code is distributed in the hope that it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 11 * version 2 for more details (a copy is included in the LICENSE file that 12 * accompanied this code). 13 * 14 * You should have received a copy of the GNU General Public License version 15 * 2 along with this work; if not, write to the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 17 * 18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 19 * or visit www.oracle.com if you need additional information or have any 20 * questions. 21 * 22 */ 23 24 /** 25 * @test TestAllocSmallObj 26 * @summary Test allocation of small object to result OOM, but not to crash JVM 27 * @key gc 28 * @requires vm.gc.Shenandoah & !vm.graal.enabled 29 * @library /test/lib 30 * @run main TestAllocSmallObj 31 */ 32 33 import jdk.test.lib.process.OutputAnalyzer; 34 import jdk.test.lib.process.ProcessTools; 35 36 public class TestAllocSmallObj { 37 38 static final int COUNT = 16 * 1024 * 1024; 39 40 static volatile Object sink; 41 42 public static void work() throws Exception { 43 Object[] root = new Object[COUNT]; 44 sink = root; 45 for (int c = 0; c < COUNT; c++) { 46 root[c] = new Object(); 47 } 48 } 49 50 public static void main(String[] args) throws Exception { 51 if (args.length > 0) { 52 work(); 53 return; 54 } 55 56 { 57 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 58 "-Xmx16m", 59 "-XX:+UnlockExperimentalVMOptions", 60 "-XX:+UseShenandoahGC", 61 TestAllocSmallObj.class.getName(), 62 "test"); 63 64 OutputAnalyzer analyzer = new OutputAnalyzer(pb.start()); 65 analyzer.shouldHaveExitValue(1); 66 analyzer.shouldContain("java.lang.OutOfMemoryError: Java heap space"); 67 } 68 69 { 70 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 71 "-Xmx1g", 72 "-XX:+UnlockExperimentalVMOptions", 73 "-XX:+UseShenandoahGC", 74 TestAllocSmallObj.class.getName(), 75 "test"); 76 77 OutputAnalyzer analyzer = new OutputAnalyzer(pb.start()); 78 analyzer.shouldHaveExitValue(0); 79 analyzer.shouldNotContain("java.lang.OutOfMemoryError: Java heap space"); 80 } 81 } 82 }