View Javadoc
1   /*
2    * Copyright (c) 2002, 2013, 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  package sun.jvm.hotspot.tools;
26  
27  import sun.jvm.hotspot.debugger.*;
28  import sun.jvm.hotspot.runtime.*;
29  import sun.jvm.hotspot.oops.*;
30  
31  /** Traverses and prints the stack traces for all Java threads in the
32   * remote VM */
33  public class StackTrace extends Tool {
34      // in non-verbose mode pc, sp and Method* are not printed
35      public StackTrace(boolean v, boolean concurrentLocks) {
36          this.verbose = v;
37          this.concurrentLocks = concurrentLocks;
38      }
39  
40      public StackTrace() {
41          this(true, true);
42      }
43  
44      public void run() {
45          run(System.out);
46      }
47  
48      public StackTrace(JVMDebugger d) {
49          super(d);
50      }
51  
52      public StackTrace(JVMDebugger d, boolean v, boolean concurrentLocks) {
53          super(d);
54          this.verbose = v;
55          this.concurrentLocks = concurrentLocks;
56      }
57  
58      public void run(java.io.PrintStream tty) {
59          // Ready to go with the database...
60          try {
61              // print deadlock information before stack trace
62              DeadlockDetector.print(tty);
63          } catch (Exception exp) {
64              exp.printStackTrace();
65              tty.println("Can't print deadlocks:" + exp.getMessage());
66          }
67  
68          try {
69              ConcurrentLocksPrinter concLocksPrinter = null;
70              if (concurrentLocks) {
71                  concLocksPrinter = new ConcurrentLocksPrinter();
72              }
73              Threads threads = VM.getVM().getThreads();
74              int i = 1;
75              for (JavaThread cur = threads.first(); cur != null; cur = cur.next(), i++) {
76                  if (cur.isJavaThread()) {
77                      Address sp = cur.getLastJavaSP();
78                      tty.print("Thread ");
79                      cur.printThreadIDOn(tty);
80                      tty.print(": (state = " + cur.getThreadState());
81                      if (verbose) {
82                          tty.println(", current Java SP = " + sp);
83                      }
84                      tty.println(')');
85                      try {
86                          for (JavaVFrame vf = cur.getLastJavaVFrameDbg(); vf != null; vf = vf.javaSender()) {
87                              Method method = vf.getMethod();
88                              tty.print(" - " + method.externalNameAndSignature() +
89                              " @bci=" + vf.getBCI());
90  
91                              int lineNumber = method.getLineNumberFromBCI(vf.getBCI());
92                              if (lineNumber != -1) {
93                                  tty.print(", line=" + lineNumber);
94                              }
95  
96                              if (verbose) {
97                                  Address pc = vf.getFrame().getPC();
98                                  if (pc != null) {
99                                      tty.print(", pc=" + pc);
100                                 }
101 
102                                 tty.print(", Method*=" + method.getAddress());
103                             }
104 
105                             if (vf.isCompiledFrame()) {
106                                 tty.print(" (Compiled frame");
107                                 if (vf.isDeoptimized()) {
108                                   tty.print(" [deoptimized]");
109                                 }
110                             }
111                             if (vf.isInterpretedFrame()) {
112                                 tty.print(" (Interpreted frame");
113                             }
114                             if (vf.mayBeImpreciseDbg()) {
115                                 tty.print("; information may be imprecise");
116                             }
117 
118                             tty.println(")");
119                         }
120                     } catch (Exception e) {
121                         tty.println("Error occurred during stack walking:");
122                         e.printStackTrace();
123                     }
124                     tty.println();
125                     if (concurrentLocks) {
126                         concLocksPrinter.print(cur, tty);
127                     }
128                     tty.println();
129               }
130           }
131       }
132       catch (AddressException e) {
133         System.err.println("Error accessing address 0x" + Long.toHexString(e.getAddress()));
134         e.printStackTrace();
135       }
136    }
137 
138    public static void main(String[] args) {
139       StackTrace st = new StackTrace();
140       st.execute(args);
141    }
142 
143    private boolean verbose;
144    private boolean concurrentLocks;
145 }