*** old/agent/src/share/classes/sun/jvm/hotspot/tools/PStack.java	Wed Mar 13 23:31:50 2013
--- new/agent/src/share/classes/sun/jvm/hotspot/tools/PStack.java	Wed Mar 13 23:31:50 2013

*** 1,7 ****
--- 1,7 ----
  /*
!  * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
!  * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.

*** 30,39 ****
--- 30,40 ----
  import sun.jvm.hotspot.interpreter.*;
  import sun.jvm.hotspot.debugger.*;
  import sun.jvm.hotspot.debugger.cdbg.*;
  import sun.jvm.hotspot.oops.*;
  import sun.jvm.hotspot.runtime.*;
+ import sun.jvm.hotspot.utilities.PlatformInfo;
  
  public class PStack extends Tool {
      // in non-verbose mode, Method*s are not printed in java frames
     public PStack(boolean v, boolean concurrentLocks) {
        this.verbose = v;

*** 52,61 ****
--- 53,67 ----
        Debugger dbg = getAgent().getDebugger();
        run(out, dbg);
     }
  
     public void run(PrintStream out, Debugger dbg) {
+       if (PlatformInfo.getOS().equals("darwin")) {
+         out.println("Not available on Darwin");
+         return;
+       }
+ 
        CDebugger cdbg = dbg.getCDebugger();
        if (cdbg != null) {
           ConcurrentLocksPrinter concLocksPrinter = null;
           // compute and cache java Vframes.
           initJFrameCache();