1 /* 2 * Copyright (c) 2015, 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 import jdk.test.lib.OutputAnalyzer; 25 import jdk.test.lib.dcmd.CommandExecutor; 26 import jdk.test.lib.dcmd.JMXExecutor; 27 import org.testng.annotations.Test; 28 import static org.testng.Assert.*; 29 30 /* 31 * @test 32 * @bug 8054890 33 * @summary Test of VM.set_flag diagnostic command 34 * @modules java.base/jdk.internal.misc 35 * @library /testlibrary 36 * @build jdk.test.lib.* 37 * @build jdk.test.lib.dcmd.* 38 * @run testng SetVMFlagTest 39 */ 40 41 public class SetVMFlagTest { 42 private static final String MANAGEABLE_PATTERN = "\\s*bool\\s+(\\S+)\\s+[\\:]?=\\s+" + 43 "(.*?)\\s+\\{manageable\\}"; 44 private static final String IMMUTABLE_PATTERN = "\\s*uintx\\s+(\\S+)\\s+[\\:]?=\\s+" + 45 "(.*?)\\s+\\{product\\}"; 46 47 public void run(CommandExecutor executor) { 48 setMutableFlag(executor); 49 setMutableFlagWithInvalidValue(executor); 50 setImmutableFlag(executor); 51 setNonExistingFlag(executor); 52 } 53 54 @Test 55 public void jmx() { 56 run(new JMXExecutor()); 57 } 58 59 private void setMutableFlag(CommandExecutor executor) { 60 OutputAnalyzer out = getAllFlags(executor); 61 String flagName = out.firstMatch(MANAGEABLE_PATTERN, 1); 62 String flagVal = out.firstMatch(MANAGEABLE_PATTERN, 2); 63 64 System.out.println("### Setting a mutable flag '" + flagName + "'"); 65 66 if (flagVal == null) { 67 System.err.println(out.getOutput()); 68 throw new Error("Can not find a boolean manageable flag"); 69 } 70 71 Boolean blnVal = Boolean.parseBoolean(flagVal); 72 73 out = executor.execute("VM.set_flag " + flagName + " " + (blnVal ? 0 : 1)); 74 out.stderrShouldBeEmpty(); 75 76 out = getAllFlags(executor); 77 78 String newFlagVal = out.firstMatch(MANAGEABLE_PATTERN.replace("(\\S+)", flagName), 1); 79 80 assertNotEquals(newFlagVal, flagVal); 81 } 82 83 private void setMutableFlagWithInvalidValue(CommandExecutor executor) { 84 OutputAnalyzer out = getAllFlags(executor); 85 String flagName = out.firstMatch(MANAGEABLE_PATTERN, 1); 86 String flagVal = out.firstMatch(MANAGEABLE_PATTERN, 2); 87 88 System.out.println("### Setting a mutable flag '" + flagName + "' to an invalid value"); 89 90 if (flagVal == null) { 91 System.err.println(out.getOutput()); 92 throw new Error("Can not find a boolean manageable flag"); 93 } 94 95 // a boolean flag accepts only 0/1 as its value 96 out = executor.execute("VM.set_flag " + flagName + " unexpected_value"); 97 out.stderrShouldBeEmpty(); 98 out.stdoutShouldContain("flag value must be a boolean (1/0 or true/false)"); 99 100 out = getAllFlags(executor); 101 102 String newFlagVal = out.firstMatch(MANAGEABLE_PATTERN.replace("(\\S+)", flagName), 1); 103 104 assertEquals(newFlagVal, flagVal); 105 } 106 107 private void setImmutableFlag(CommandExecutor executor) { 108 OutputAnalyzer out = getAllFlags(executor); 109 String flagName = out.firstMatch(IMMUTABLE_PATTERN, 1); 110 String flagVal = out.firstMatch(IMMUTABLE_PATTERN, 2); 111 112 System.out.println("### Setting an immutable flag '" + flagName + "'"); 113 114 if (flagVal == null) { 115 System.err.println(out.getOutput()); 116 throw new Error("Can not find an immutable uintx flag"); 117 } 118 119 Long numVal = Long.parseLong(flagVal); 120 121 out = executor.execute("VM.set_flag " + flagName + " " + (numVal + 1)); 122 out.stderrShouldBeEmpty(); 123 out.stdoutShouldContain("only 'writeable' flags can be set"); 124 125 out = getAllFlags(executor); 126 127 String newFlagVal = out.firstMatch(IMMUTABLE_PATTERN.replace("(\\S+)", flagName), 1); 128 129 assertEquals(newFlagVal, flagVal); 130 } 131 132 private void setNonExistingFlag(CommandExecutor executor) { 133 String unknownFlag = "ThisIsUnknownFlag"; 134 System.out.println("### Setting a non-existing flag '" + unknownFlag + "'"); 135 OutputAnalyzer out = executor.execute("VM.set_flag " + unknownFlag + " 1"); 136 out.stderrShouldBeEmpty(); 137 out.stdoutShouldContain("flag " + unknownFlag + " does not exist"); 138 } 139 140 private OutputAnalyzer getAllFlags(CommandExecutor executor) { 141 return executor.execute("VM.flags -all", true); 142 } 143 }