J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | */ |
| 23 | |
| 24 | /* |
| 25 | * Thread Dump utility class for printing |
| 26 | * @author Mandy Chung |
| 27 | */ |
| 28 | |
| 29 | import java.lang.management.*; |
| 30 | import java.util.*; |
| 31 | |
| 32 | public class ThreadDump { |
| 33 | private static final String INDENT = " "; |
| 34 | |
| 35 | public static void printThreadInfo(ThreadInfo ti) { |
| 36 | StringBuilder sb = new StringBuilder("\"" + ti.getThreadName() + "\"" + |
| 37 | " Id=" + ti.getThreadId() + |
| 38 | " in " + ti.getThreadState()); |
| 39 | if (ti.getLockName() != null) { |
| 40 | sb.append(" on lock=" + ti.getLockName()); |
| 41 | } |
| 42 | if (ti.isSuspended()) { |
| 43 | sb.append(" (suspended)"); |
| 44 | } |
| 45 | if (ti.isInNative()) { |
| 46 | sb.append(" (running in native)"); |
| 47 | } |
| 48 | System.out.println(sb.toString()); |
| 49 | if (ti.getLockOwnerName() != null) { |
| 50 | System.out.println(INDENT + " owned by " + ti.getLockOwnerName() + |
| 51 | " Id=" + ti.getLockOwnerId()); |
| 52 | } |
| 53 | StackTraceElement[] stacktrace = ti.getStackTrace(); |
| 54 | MonitorInfo[] monitors = ti.getLockedMonitors(); |
| 55 | for (int i = 0; i < stacktrace.length; i++) { |
| 56 | StackTraceElement ste = stacktrace[i]; |
| 57 | System.out.println(INDENT + "at " + ste.toString()); |
| 58 | |
| 59 | for (MonitorInfo mi : monitors) { |
| 60 | if (mi.getLockedStackDepth() == i) { |
| 61 | System.out.println(INDENT + " - locked " + mi); |
| 62 | } |
| 63 | } |
| 64 | } |
| 65 | System.out.println(); |
| 66 | } |
| 67 | |
| 68 | public static void printStack(StackTraceElement[] stack) { |
| 69 | System.out.println(INDENT + "Stack: (length = " + stack.length + ")"); |
| 70 | for (int j = 0; j < stack.length; j++) { |
| 71 | System.out.println(INDENT + INDENT + stack[j]); |
| 72 | } |
| 73 | System.out.println(); |
| 74 | } |
| 75 | |
| 76 | public static void dumpStacks() { |
| 77 | // Get stack traces of all Threads |
| 78 | Map m = Thread.getAllStackTraces(); |
| 79 | Set s = m.entrySet(); |
| 80 | Iterator iter = s.iterator(); |
| 81 | |
| 82 | Map.Entry entry; |
| 83 | while (iter.hasNext()) { |
| 84 | entry = (Map.Entry) iter.next(); |
| 85 | Thread t = (Thread) entry.getKey(); |
| 86 | StackTraceElement[] stack = (StackTraceElement[]) entry.getValue(); |
| 87 | System.out.println(t); |
| 88 | printStack(stack); |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | public static void printLockInfo(LockInfo[] locks) { |
| 93 | System.out.println(INDENT + "Locked synchronizers: count = " + locks.length); |
| 94 | for (LockInfo li : locks) { |
| 95 | System.out.println(INDENT + " - " + li); |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | static ThreadMXBean tmbean = ManagementFactory.getThreadMXBean(); |
| 100 | public static void threadDump() { |
| 101 | System.out.println("Full Java thread dump"); |
| 102 | ThreadInfo[] tinfos = tmbean.dumpAllThreads(true, true); |
| 103 | for (ThreadInfo ti : tinfos) { |
| 104 | printThreadInfo(ti); |
| 105 | LockInfo[] syncs = ti.getLockedSynchronizers(); |
| 106 | printLockInfo(syncs); |
| 107 | System.out.println(); |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | } |