--- /dev/null 2018-12-03 11:58:50.256341286 +0100 +++ new/test/hotspot/jtreg/gc/shenandoah/oom/TestAllocSmallObj.java 2018-12-03 17:46:42.840725805 +0100 @@ -0,0 +1,82 @@ +/* + * Copyright (c) 2018, Red Hat, Inc. All rights reserved. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + * + */ + +/** + * @test TestAllocSmallObj + * @summary Test allocation of small object to result OOM, but not to crash JVM + * @key gc + * @requires vm.gc.Shenandoah + * @library /test/lib + * @run main TestAllocSmallObj + */ + +import jdk.test.lib.process.OutputAnalyzer; +import jdk.test.lib.process.ProcessTools; + +public class TestAllocSmallObj { + + static final int COUNT = 16 * 1024 * 1024; + + static volatile Object sink; + + public static void work() throws Exception { + Object[] root = new Object[COUNT]; + sink = root; + for (int c = 0; c < COUNT; c++) { + root[c] = new Object(); + } + } + + public static void main(String[] args) throws Exception { + if (args.length > 0) { + work(); + return; + } + + { + ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( + "-Xmx16m", + "-XX:+UnlockExperimentalVMOptions", + "-XX:+UseShenandoahGC", + TestAllocSmallObj.class.getName(), + "test"); + + OutputAnalyzer analyzer = new OutputAnalyzer(pb.start()); + analyzer.shouldHaveExitValue(1); + analyzer.shouldContain("java.lang.OutOfMemoryError: Java heap space"); + } + + { + ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( + "-Xmx1g", + "-XX:+UnlockExperimentalVMOptions", + "-XX:+UseShenandoahGC", + TestAllocSmallObj.class.getName(), + "test"); + + OutputAnalyzer analyzer = new OutputAnalyzer(pb.start()); + analyzer.shouldHaveExitValue(0); + analyzer.shouldNotContain("java.lang.OutOfMemoryError: Java heap space"); + } + } +}