agent/src/share/classes/sun/jvm/hotspot/runtime/Threads.java

8003348: SA can not read core file on OS X

*** 1,7 ****
  /*
!  * Copyright (c) 2000, 2012, 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.
--- 1,7 ----
  /*
!  * Copyright (c) 2000, 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.
*** 40,49 ****
--- 40,50 ----
  import sun.jvm.hotspot.utilities.*;
  
  public class Threads {
      private static JavaThreadFactory threadFactory;
      private static AddressField      threadListField;
+     private static CIntegerField     numOfThreadsField;
      private static VirtualConstructor virtualConstructor;
      private static JavaThreadPDAccess access;
  
      static {
          VM.registerVMInitializedObserver(new Observer() {
*** 55,64 ****
--- 56,66 ----
  
      private static synchronized void initialize(TypeDataBase db) {
          Type type = db.lookupType("Threads");
  
          threadListField = type.getAddressField("_thread_list");
+         numOfThreadsField = type.getCIntegerField("_number_of_threads");
  
          // Instantiate appropriate platform-specific JavaThreadFactory
          String os  = VM.getVM().getOS();
          String cpu = VM.getVM().getCPU();
  
*** 100,110 ****
--- 102,116 ----
              if (cpu.equals("x86")) {
                  access = new BsdX86JavaThreadPDAccess();
              } else if (cpu.equals("amd64") || cpu.equals("x86_64")) {
                  access = new BsdAMD64JavaThreadPDAccess();
              }
+         } else if (os.equals("darwin")) {
+             if (cpu.equals("amd64") || cpu.equals("x86_64")) {
+                 access = new BsdAMD64JavaThreadPDAccess();
              }
+         }
  
          if (access == null) {
              throw new RuntimeException("OS/CPU combination " + os + "/" + cpu +
              " not yet supported");
          }
*** 142,151 ****
--- 148,161 ----
          }
  
          return createJavaThreadWrapper(threadAddr);
      }
  
+     public int getNumberOfThreads() {
+         return (int) numOfThreadsField.getValue();
+     }
+ 
      /** Routine for instantiating appropriately-typed wrapper for a
        JavaThread. Currently needs to be public for OopUtilities to
        access it. */
      public JavaThread createJavaThreadWrapper(Address threadAddr) {
          try {