| /* |
| * Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * - Neither the name of Oracle nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /* |
| * This file defines 'jstack' function to print stack traces of |
| * threads.'jstack' function which can be called once or periodically |
| * from a timer thread (calling it periodically would slow down the target |
| * application). To call this once, just call 'jstack()' in script |
| * console prompt. To call jtop in a timer thread, you can use |
| * |
| * var t = setTimeout(function () { jstack(print); }, 5000); |
| * |
| * The above call prints threads in sorted order for every 5 seconds. |
| * The print output goes to OS console window from which jconsole was |
| * started. The timer can be cancelled later by clearTimeout() function |
| * as shown below: |
| * |
| * clearTimeout(t); |
| */ |
| |
| |
| /** |
| * print given ThreadInfo using given printFunc |
| */ |
| function printThreadInfo(ti, printFunc) { |
| printFunc(ti.threadId + " - " + ti.threadName + " - " + ti.threadState); |
| var stackTrace = ti.stackTrace; |
| for (var i in stackTrace) { |
| printFunc("\t" + stackTrace[i]); |
| } |
| } |
| |
| /** |
| * print stack traces of all threads. |
| * |
| * @param printFunc function called to print [optional] |
| * @param maxFrames maximum number of frames to print [optional] |
| */ |
| function jstack(printFunc, maxFrames) { |
| // by default use 'echo' to print. Other choices could be |
| // 'print' or custom function that writes in a text file |
| if (printFunc == undefined) { |
| printFunc = echo; |
| } |
| |
| // by default print 25 frames |
| if (maxFrames == undefined) { |
| maxFrames = 25; |
| } |
| |
| var tmbean = newPlatformMXBeanProxy( |
| "java.lang:type=Threading", |
| java.lang.management.ThreadMXBean); |
| |
| var tids = tmbean.allThreadIds; |
| var tinfos = tmbean["getThreadInfo(long[],int)"](tids, maxFrames); |
| |
| for (var i in tinfos) { |
| printThreadInfo(tinfos[i], printFunc); |
| } |
| } |