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 TestAllocLargeObj 26 * @summary Test allocation of small object to result OOM, but not to crash JVM 27 * @library /test/lib 28 * @run main TestAllocLargeObj 29 */ 30 31 import jdk.test.lib.process.OutputAnalyzer; 32 import jdk.test.lib.process.ProcessTools; 33 34 public class TestAllocLargeObj { 35 36 static final int SIZE = 1*1024*1024; 37 static final int COUNT = 16; 38 39 static volatile Object sink; 40 41 public static void work() throws Exception { 42 Object[] root = new Object[COUNT]; 43 sink = root; 44 for (int c = 0; c < COUNT; c++) { 45 root[c] = new Object[SIZE]; 46 } 47 } 48 49 public static void main(String[] args) throws Exception { 50 if (args.length > 0) { 51 work(); 52 return; 53 } 54 55 { 56 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 57 "-Xmx16m", 58 "-XX:+UnlockExperimentalVMOptions", 59 "-XX:+UseShenandoahGC", 60 TestAllocLargeObj.class.getName(), 61 "test"); 62 63 OutputAnalyzer analyzer = new OutputAnalyzer(pb.start()); 64 analyzer.shouldHaveExitValue(1); 65 analyzer.shouldContain("java.lang.OutOfMemoryError: Java heap space"); 66 } 67 68 { 69 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 70 "-Xmx1g", 71 "-XX:+UnlockExperimentalVMOptions", 72 "-XX:+UseShenandoahGC", 73 TestAllocLargeObj.class.getName(), 74 "test"); 75 76 OutputAnalyzer analyzer = new OutputAnalyzer(pb.start()); 77 analyzer.shouldHaveExitValue(0); 78 analyzer.shouldNotContain("java.lang.OutOfMemoryError: Java heap space"); 79 } 80 } 81 }