1 /* 2 * Copyright (c) 2015, 2016, 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 /* 25 * @test 26 * @summary Verify jcmd error message for out-of-range value and for 27 * value which is not allowed by constraint. Also check that 28 * jcmd does not print an error message to the target process output. 29 * @library /test/lib 30 * @modules java.base/jdk.internal.misc 31 * java.management 32 * jdk.management 33 * @run main TestJcmdOutput 34 */ 35 36 import jdk.test.lib.Asserts; 37 import jdk.test.lib.management.DynamicVMOption; 38 import jdk.test.lib.process.OutputAnalyzer; 39 import jdk.test.lib.process.ProcessTools; 40 import jdk.test.lib.dcmd.PidJcmdExecutor; 41 42 public class TestJcmdOutput { 43 44 /* Message printed by jcmd for value which is out-of-range */ 45 static final String JCMD_OUT_OF_RANGE_MESSAGE = "error: must have value in range"; 46 /* Message printed by jcmd for value which is not allowed by constraint */ 47 static final String JCMD_CONSTRAINT_MESSAGE = "value violates its flag's constraint"; 48 49 public static void main(String[] args) throws Exception { 50 OutputAnalyzer output; 51 52 System.out.println("Verify jcmd error message and that jcmd does not write errors to the target process output"); 53 output = new OutputAnalyzer((ProcessTools.createJavaProcessBuilder( 54 "-Dtest.jdk=" + System.getProperty("test.jdk"), 55 "-XX:MinHeapFreeRatio=20", "-XX:MaxHeapFreeRatio=80", runJcmd.class.getName())).start()); 56 57 output.shouldHaveExitValue(0); 58 /* Verify that jcmd not print error message to the target process output */ 59 output.shouldNotContain(JCMD_OUT_OF_RANGE_MESSAGE); 60 output.shouldNotContain(JCMD_CONSTRAINT_MESSAGE); 61 } 62 63 public static class runJcmd { 64 65 public static void main(String[] args) throws Exception { 66 int minHeapFreeRatio = new Integer((new DynamicVMOption("MinHeapFreeRatio")).getValue()); 67 int maxHeapFreeRatio = new Integer((new DynamicVMOption("MaxHeapFreeRatio")).getValue()); 68 PidJcmdExecutor executor = new PidJcmdExecutor(); 69 70 Asserts.assertGT(minHeapFreeRatio, 0, "MinHeapFreeRatio must be greater than 0"); 71 Asserts.assertLT(maxHeapFreeRatio, 100, "MaxHeapFreeRatio must be less than 100"); 72 73 /* Check out-of-range values */ 74 executor.execute("VM.set_flag MinHeapFreeRatio -1", true).shouldContain(JCMD_OUT_OF_RANGE_MESSAGE); 75 executor.execute("VM.set_flag MaxHeapFreeRatio 101", true).shouldContain(JCMD_OUT_OF_RANGE_MESSAGE); 76 77 /* Check values which not allowed by constraint */ 78 executor.execute( 79 String.format("VM.set_flag MinHeapFreeRatio %d", maxHeapFreeRatio + 1), true) 80 .shouldContain(JCMD_CONSTRAINT_MESSAGE); 81 executor.execute( 82 String.format("VM.set_flag MaxHeapFreeRatio %d", minHeapFreeRatio - 1), true) 83 .shouldContain(JCMD_CONSTRAINT_MESSAGE); 84 } 85 } 86 }