gdb/linux-nat.h

   1 /* Native debugging support for GNU/Linux (LWP layer).
   2
   3    Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #include "target.h"
  22
  23 /* Structure describing an LWP.  */
  24
  25 struct lwp_info
  26 {
  27   /* The process id of the LWP.  This is a combination of the LWP id
  28      and overall process id.  */
  29   ptid_t ptid;
  30
  31   /* Non-zero if this LWP is cloned.  In this context "cloned" means
  32      that the LWP is reporting to its parent using a signal other than
  33      SIGCHLD.  */
  34   int cloned;
  35
  36   /* Non-zero if we sent this LWP a SIGSTOP (but the LWP didn't report
  37      it back yet).  */
  38   int signalled;
  39
  40   /* Non-zero if this LWP is stopped.  */
  41   int stopped;
  42
  43   /* Non-zero if this LWP will be/has been resumed.  Note that an LWP
  44      can be marked both as stopped and resumed at the same time.  This
  45      happens if we try to resume an LWP that has a wait status
  46      pending.  We shouldn't let the LWP run until that wait status has
  47      been processed, but we should not report that wait status if GDB
  48      didn't try to let the LWP run.  */
  49   int resumed;
  50
  51   /* If non-zero, a pending wait status.  */
  52   int status;
  53
  54   /* Non-zero if we were stepping this LWP.  */
  55   int step;
  56
  57   /* If WAITSTATUS->KIND != TARGET_WAITKIND_SPURIOUS, the waitstatus
  58      for this LWP's last event.  This may correspond to STATUS above,
  59      or to a local variable in lin_lwp_wait.  */
  60   struct target_waitstatus waitstatus;
  61
  62   /* Next LWP in list.  */
  63   struct lwp_info *next;
  64 };
  65
  66 /* Attempt to initialize libthread_db.  */
  67 void check_for_thread_db (void);
  68
  69 /* Tell the thread_db layer what native target operations to use.  */
  70 void thread_db_init (struct target_ops *);
  71
  72 /* Find process PID's pending signal set from /proc/pid/status.  */
  73 void linux_proc_pending_signals (int pid, sigset_t *pending, sigset_t *blocked, sigset_t *ignored);
  74
  75 /* linux-nat functions for handling fork events.  */
  76 extern void linux_enable_event_reporting (ptid_t ptid);
  77
  78 extern int lin_lwp_attach_lwp (ptid_t ptid, int verbose);
  79
  80 /* Iterator function for lin-lwp's lwp list.  */
  81 struct lwp_info *iterate_over_lwps (int (*callback) (struct lwp_info *,
  82                                                      void *),
  83                                     void *data);
  84
  85 /* Create a prototype generic GNU/Linux target.  The client can
  86    override it with local methods.  */
  87 struct target_ops * linux_target (void);
  88
  89 /* Create a generic GNU/Linux target using traditional
  90    ptrace register access.  */
  91 struct target_ops *
  92 linux_trad_target (CORE_ADDR (*register_u_offset)(struct gdbarch *, int, int));
  93
  94 /* Register the customized GNU/Linux target.  This should be used
  95    instead of calling add_target directly.  */
  96 void linux_nat_add_target (struct target_ops *);
  97
  98 /* Update linux-nat internal state when changing from one fork
  99    to another.  */
 100 void linux_nat_switch_fork (ptid_t new_ptid);