1 /* 2 * Copyright (c) 2014, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 package gc.arguments; 25 26 /* 27 * @test TestArrayAllocatorMallocLimit 28 * @summary Sanity check that the ArrayAllocatorMallocLimit flag can be set. 29 * The test helps verifying that size_t flags can be set/read. 30 * @bug 8054823 31 * @key gc 32 * @library /test/lib 33 * @library / 34 * @modules java.base/jdk.internal.misc 35 * java.management 36 * @run driver gc.arguments.TestArrayAllocatorMallocLimit 37 */ 38 39 import jdk.test.lib.Asserts; 40 import jdk.test.lib.process.OutputAnalyzer; 41 import jdk.test.lib.process.ProcessTools; 42 import java.math.BigInteger; 43 44 public class TestArrayAllocatorMallocLimit { main(String [] args)45 public static void main(String [] args) throws Exception { 46 testDefaultValue(); 47 testSetValue(); 48 } 49 50 private static final String flagName = "ArrayAllocatorMallocLimit"; 51 52 // size_t ArrayAllocatorMallocLimit = 18446744073709551615{experimental} 53 private static final String printFlagsFinalPattern = " *size_t *" + flagName + " *:?= *(\\d+) *\\{experimental\\} *"; 54 testDefaultValue()55 public static void testDefaultValue() throws Exception { 56 ProcessBuilder pb = GCArguments.createJavaProcessBuilder( 57 "-XX:+UnlockExperimentalVMOptions", "-XX:+PrintFlagsFinal", "-version"); 58 59 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 60 String value = output.firstMatch(printFlagsFinalPattern, 1); 61 62 try { 63 Asserts.assertNotNull(value, "Couldn't find size_t flag " + flagName); 64 65 // A size_t is not always parseable with Long.parseValue, 66 // use BigInteger instead. 67 BigInteger biValue = new BigInteger(value); 68 69 // Sanity check that we got a non-zero value. 70 Asserts.assertNotEquals(biValue, "0"); 71 72 output.shouldHaveExitValue(0); 73 } catch (Exception e) { 74 System.err.println(output.getOutput()); 75 throw e; 76 } 77 } 78 testSetValue()79 public static void testSetValue() throws Exception { 80 long flagValue = 2048; 81 82 ProcessBuilder pb = GCArguments.createJavaProcessBuilder( 83 "-XX:+UnlockExperimentalVMOptions", "-XX:" + flagName + "=" + flagValue, "-XX:+PrintFlagsFinal", "-version"); 84 85 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 86 String value = output.firstMatch(printFlagsFinalPattern, 1); 87 88 try { 89 Asserts.assertNotNull("Couldn't find size_t flag " + flagName); 90 91 long longValue = Long.parseLong(value); 92 93 Asserts.assertEquals(longValue, flagValue); 94 95 output.shouldHaveExitValue(0); 96 } catch (Exception e) { 97 System.err.println(output.getOutput()); 98 throw e; 99 } 100 } 101 102 } 103