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 2 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, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street, Fifth Floor,
  21    Boston, MA 02110-1301, USA.  */
  22
  23 #include "target.h"
  24
  25 /* Structure describing an LWP.  */
  26
  27 struct lwp_info
  28 {
  29   /* The process id of the LWP.  This is a combination of the LWP id
  30      and overall process id.  */
  31   ptid_t ptid;
  32
  33   /* Non-zero if this LWP is cloned.  In this context "cloned" means
  34      that the LWP is reporting to its parent using a signal other than
  35      SIGCHLD.  */
  36   int cloned;
  37
  38   /* Non-zero if we sent this LWP a SIGSTOP (but the LWP didn't report
  39      it back yet).  */
  40   int signalled;
  41
  42   /* Non-zero if this LWP is stopped.  */
  43   int stopped;
  44
  45   /* Non-zero if this LWP will be/has been resumed.  Note that an LWP
  46      can be marked both as stopped and resumed at the same time.  This
  47      happens if we try to resume an LWP that has a wait status
  48      pending.  We shouldn't let the LWP run until that wait status has
  49      been processed, but we should not report that wait status if GDB
  50      didn't try to let the LWP run.  */
  51   int resumed;
  52
  53   /* If non-zero, a pending wait status.  */
  54   int status;
  55
  56   /* Non-zero if we were stepping this LWP.  */
  57   int step;
  58
  59   /* If WAITSTATUS->KIND != TARGET_WAITKIND_SPURIOUS, the waitstatus
  60      for this LWP's last event.  This may correspond to STATUS above,
  61      or to a local variable in lin_lwp_wait.  */
  62   struct target_waitstatus waitstatus;
  63
  64   /* Next LWP in list.  */
  65   struct lwp_info *next;
  66 };
  67
  68 /* Attempt to initialize libthread_db.  */
  69 void check_for_thread_db (void);
  70
  71 /* Tell the thread_db layer what native target operations to use.  */
  72 void thread_db_init (struct target_ops *);
  73
  74 /* Find process PID's pending signal set from /proc/pid/status.  */
  75 void linux_proc_pending_signals (int pid, sigset_t *pending, sigset_t *blocked, sigset_t *ignored);
  76
  77 /* linux-nat functions for handling fork events.  */
  78 extern void linux_enable_event_reporting (ptid_t ptid);
  79
  80 extern int lin_lwp_attach_lwp (ptid_t ptid, int verbose);
  81
  82 /* Iterator function for lin-lwp's lwp list.  */
  83 struct lwp_info *iterate_over_lwps (int (*callback) (struct lwp_info *,
  84                                                      void *),
  85                                     void *data);
  86
  87 /* Create a prototype generic GNU/Linux target.  The client can
  88    override it with local methods.  */
  89 struct target_ops * linux_target (void);
  90
  91 /* Register the customized GNU/Linux target.  This should be used
  92    instead of calling add_target directly.  */
  93 void linux_nat_add_target (struct target_ops *);
  94
  95 /* Update linux-nat internal state when changing from one fork
  96    to another.  */
  97 void linux_nat_switch_fork (ptid_t new_ptid);