Merge GDB 7.5.1

gdb/darwin-nat.h

 /* Common things used by the various darwin files
    Copyright (C) 1995-1997, 1999-2000, 2007-2012 Free Software
    Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
@@ skipping 43 matching lines @@
   mach_port_t task_port;
 
   /* Type of the exception.  */
   exception_type_t ex_type;
 
   /* Machine dependent details.  */
   mach_msg_type_number_t data_count;
   integer_t ex_data[2];
 };
 
-enum darwin_msg_state { DARWIN_RUNNING, DARWIN_STOPPED, DARWIN_MESSAGE };
+enum darwin_msg_state
+{
+  /* The thread is running.  */
+  DARWIN_RUNNING,
+
+  /* The thread is stopped.  */
+  DARWIN_STOPPED,
+
+  /* The thread has sent a message and waits for a reply.  */
+  DARWIN_MESSAGE
+};
 
 struct private_thread_info
 {
   /* The thread port from a GDB point of view.  */
   thread_t gdb_port;
 
   /* The thread port from the inferior point of view.  Not to be used inside
      gdb except for get_ada_task_ptid.  */
   thread_t inf_port;
 
@@ skipping 68 matching lines @@
 void darwin_set_sstep (thread_t thread, int enable);
 
 /* This one is called in darwin-nat.c, but needs to be provided by the
    platform specific nat code.  It allows each platform to add platform specific
    stuff to the darwin_ops.  */
 extern void darwin_complete_target (struct target_ops *target);
 
 void darwin_check_osabi (darwin_inferior *inf, thread_t thread);
 
 #endif /* __DARWIN_NAT_H__ */