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 /* 25 * @test 26 * @summary Checks that jstack correctly prints the thread names 27 * @modules java.base/jdk.internal.misc 28 * @library /test/lib 29 * @library ../share 30 * @run main/othervm -XX:+UsePerfData ThreadNamesTest 31 */ 32 import common.ToolResults; 33 import utils.*; 34 35 public class ThreadNamesTest { 36 37 private static final String STRANGE_NAME = "-_?+!@#$%^*()"; 38 private static final String LONG_NAME = "loooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong"; 39 40 static class NamedThread extends Thread { 41 42 NamedThread(String name) { 43 setName(name); 44 } 45 46 @Override 47 public void run() { 48 Utils.sleep(); 49 } 50 } 51 52 public static void main(String[] args) throws Exception { 53 testWithName(STRANGE_NAME); 54 testWithName(""); 55 testWithName(LONG_NAME); 56 } 57 58 private static void testWithName(String name) throws Exception { 59 // Start a thread with some strange name 60 NamedThread thread = new NamedThread(name); 61 thread.start(); 62 63 // Run jstack tool and collect the output 64 JstackTool jstackTool = new JstackTool(ProcessHandle.current().getPid()); 65 ToolResults results = jstackTool.measure(); 66 67 // Analyze the jstack output for the strange thread name 68 JStack jstack1 = new DefaultFormat().parse(results.getStdoutString()); 69 ThreadStack ti1 = jstack1.getThreadStack(name); 70 71 if (ti1 == null) { 72 throw new RuntimeException("jstack output doesn't contain thread info for the thread '" + name + "'"); 73 } 74 } 75 76 }