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 * @library /test/lib 28 * @run main TestAllocSmallObj 29 */ 30 31 import jdk.test.lib.process.OutputAnalyzer; 32 import jdk.test.lib.process.ProcessTools; 33 34 public class TestAllocSmallObj { 35 36 static final int COUNT = 16*1024*1024; 37 38 static volatile Object sink; 39 40 public static void work() throws Exception { 41 Object[] root = new Object[COUNT]; 42 sink = root; 43 for (int c = 0; c < COUNT; c++) { 44 root[c] = new Object(); 45 } 46 } 47 48 public static void main(String[] args) throws Exception { 49 if (args.length > 0) { 50 work(); 51 return; 52 } 53 54 { 55 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 56 "-Xmx16m", 57 "-XX:+UnlockExperimentalVMOptions", 58 "-XX:+UseShenandoahGC", 59 TestAllocSmallObj.class.getName(), 60 "test"); 61 62 OutputAnalyzer analyzer = new OutputAnalyzer(pb.start()); 63 analyzer.shouldHaveExitValue(1); 64 analyzer.shouldContain("java.lang.OutOfMemoryError: Java heap space"); 65 } 66 67 { 68 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 69 "-Xmx1g", 70 "-XX:+UnlockExperimentalVMOptions", 71 "-XX:+UseShenandoahGC", 72 TestAllocSmallObj.class.getName(), 73 "test"); 74 75 OutputAnalyzer analyzer = new OutputAnalyzer(pb.start()); 76 analyzer.shouldHaveExitValue(0); 77 analyzer.shouldNotContain("java.lang.OutOfMemoryError: Java heap space"); 78 } 79 } 80 }