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 * @key gc 28 * @requires vm.gc.Shenandoah 29 * @library /test/lib 30 * @run main TestAllocLargeObj 31 */ 32 33 import jdk.test.lib.process.OutputAnalyzer; 34 import jdk.test.lib.process.ProcessTools; 35 36 public class TestAllocLargeObj { 37 38 static final int SIZE = 1 * 1024 * 1024; 39 static final int COUNT = 16; 40 41 static volatile Object sink; 42 43 public static void work() throws Exception { 44 Object[] root = new Object[COUNT]; 45 sink = root; 46 for (int c = 0; c < COUNT; c++) { 47 root[c] = new Object[SIZE]; 48 } 49 } 50 51 public static void main(String[] args) throws Exception { 52 if (args.length > 0) { 53 work(); 54 return; 55 } 56 57 { 58 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 59 "-Xmx16m", 60 "-XX:+UnlockExperimentalVMOptions", 61 "-XX:+UseShenandoahGC", 62 TestAllocLargeObj.class.getName(), 63 "test"); 64 65 OutputAnalyzer analyzer = new OutputAnalyzer(pb.start()); 66 analyzer.shouldHaveExitValue(1); 67 analyzer.shouldContain("java.lang.OutOfMemoryError: Java heap space"); 68 } 69 70 { 71 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 72 "-Xmx1g", 73 "-XX:+UnlockExperimentalVMOptions", 74 "-XX:+UseShenandoahGC", 75 TestAllocLargeObj.class.getName(), 76 "test"); 77 78 OutputAnalyzer analyzer = new OutputAnalyzer(pb.start()); 79 analyzer.shouldHaveExitValue(0); 80 analyzer.shouldNotContain("java.lang.OutOfMemoryError: Java heap space"); 81 } 82 } 83 }