Merge GDB 7.5.1

gdb/common/linux-procfs.h

 /* Linux-specific PROCFS manipulation routines.
    Copyright (C) 2011-2012 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
    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,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #ifndef COMMON_LINUX_PROCFS_H
 #define COMMON_LINUX_PROCFS_H
 
 #include <unistd.h>
 
 /* Return the TGID of LWPID from /proc/pid/status.  Returns -1 if not
    found.  */
 
-extern int linux_proc_get_tgid (int lwpid);
+extern int linux_proc_get_tgid (pid_t lwpid);
+
+/* Return the TracerPid of LWPID from /proc/pid/status.  Returns -1 if not
+   found.  */
+
+extern pid_t linux_proc_get_tracerpid (pid_t lwpid);
+
+/* Detect `T (stopped)' in `/proc/PID/status'.
+   Other states including `T (tracing stop)' are reported as false.  */
+
+extern int linux_proc_pid_is_stopped (pid_t pid);
+
+/* Return non-zero if PID is a zombie.  */
+
+extern int linux_proc_pid_is_zombie (pid_t pid);
 
 #endif /* COMMON_LINUX_PROCFS_H */