1 /* 2 * Copyright (c) 2018 Red Hat, Inc. and/or its affiliates. 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 /testlibrary 28 * @run main TestAllocSmallObj 29 */ 30 31 import com.oracle.java.testlibrary.*; 32 33 public class TestAllocSmallObj { 34 35 static final int COUNT = 16*1024*1024; 36 37 static volatile Object sink; 38 39 public static void work() throws Exception { 40 Object[] root = new Object[COUNT]; 41 sink = root; 42 for (int c = 0; c < COUNT; c++) { 43 root[c] = new Object(); 44 } 45 } 46 47 public static void main(String[] args) throws Exception { 48 if (args.length > 0) { 49 work(); 50 return; 51 } 52 53 { 54 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 55 "-Xmx16m", 56 "-XX:+UseShenandoahGC", 57 TestAllocSmallObj.class.getName(), 58 "test"); 59 60 OutputAnalyzer analyzer = new OutputAnalyzer(pb.start()); 61 analyzer.shouldHaveExitValue(1); 62 analyzer.shouldContain("java.lang.OutOfMemoryError: Java heap space"); 63 } 64 65 { 66 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 67 "-Xmx1g", 68 "-XX:+UseShenandoahGC", 69 TestAllocSmallObj.class.getName(), 70 "test"); 71 72 OutputAnalyzer analyzer = new OutputAnalyzer(pb.start()); 73 analyzer.shouldHaveExitValue(0); 74 analyzer.shouldNotContain("java.lang.OutOfMemoryError: Java heap space"); 75 } 76 } 77 }