| /* Native debugging support for GNU/Linux (LWP layer). |
| |
| Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
| 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/>. */ |
| |
| #include "target.h" |
| |
| #include <signal.h> |
| |
| /* Structure describing an LWP. This is public only for the purposes |
| of ALL_LWPS; target-specific code should generally not access it |
| directly. */ |
| |
| struct lwp_info |
| { |
| /* The process id of the LWP. This is a combination of the LWP id |
| and overall process id. */ |
| ptid_t ptid; |
| |
| /* Non-zero if this LWP is cloned. In this context "cloned" means |
| that the LWP is reporting to its parent using a signal other than |
| SIGCHLD. */ |
| int cloned; |
| |
| /* Non-zero if we sent this LWP a SIGSTOP (but the LWP didn't report |
| it back yet). */ |
| int signalled; |
| |
| /* Non-zero if this LWP is stopped. */ |
| int stopped; |
| |
| /* Non-zero if this LWP will be/has been resumed. Note that an LWP |
| can be marked both as stopped and resumed at the same time. This |
| happens if we try to resume an LWP that has a wait status |
| pending. We shouldn't let the LWP run until that wait status has |
| been processed, but we should not report that wait status if GDB |
| didn't try to let the LWP run. */ |
| int resumed; |
| |
| /* If non-zero, a pending wait status. */ |
| int status; |
| |
| /* Non-zero if we were stepping this LWP. */ |
| int step; |
| |
| /* Non-zero si_signo if this LWP stopped with a trap. si_addr may |
| be the address of a hardware watchpoint. */ |
| struct siginfo siginfo; |
| |
| /* If WAITSTATUS->KIND != TARGET_WAITKIND_SPURIOUS, the waitstatus |
| for this LWP's last event. This may correspond to STATUS above, |
| or to a local variable in lin_lwp_wait. */ |
| struct target_waitstatus waitstatus; |
| |
| /* Next LWP in list. */ |
| struct lwp_info *next; |
| }; |
| |
| /* The global list of LWPs, for ALL_LWPS. Unlike the threads list, |
| there is always at least one LWP on the list while the GNU/Linux |
| native target is active. */ |
| extern struct lwp_info *lwp_list; |
| |
| /* Iterate over the PTID each active thread (light-weight process). There |
| must be at least one. */ |
| #define ALL_LWPS(LP, PTID) \ |
| for ((LP) = lwp_list, (PTID) = (LP)->ptid; \ |
| (LP) != NULL; \ |
| (LP) = (LP)->next, (PTID) = (LP) ? (LP)->ptid : (PTID)) |
| |
| /* Attempt to initialize libthread_db. */ |
| void check_for_thread_db (void); |
| |
| /* Tell the thread_db layer what native target operations to use. */ |
| void thread_db_init (struct target_ops *); |
| |
| /* Find process PID's pending signal set from /proc/pid/status. */ |
| void linux_proc_pending_signals (int pid, sigset_t *pending, sigset_t *blocked, sigset_t *ignored); |
| |
| /* linux-nat functions for handling fork events. */ |
| extern void linux_enable_event_reporting (ptid_t ptid); |
| |
| extern int lin_lwp_attach_lwp (ptid_t ptid); |
| |
| /* Iterator function for lin-lwp's lwp list. */ |
| struct lwp_info *iterate_over_lwps (int (*callback) (struct lwp_info *, |
| void *), |
| void *data); |
| |
| /* Create a prototype generic GNU/Linux target. The client can |
| override it with local methods. */ |
| struct target_ops * linux_target (void); |
| |
| /* Create a generic GNU/Linux target using traditional |
| ptrace register access. */ |
| struct target_ops * |
| linux_trad_target (CORE_ADDR (*register_u_offset)(struct gdbarch *, int, int)); |
| |
| /* Register the customized GNU/Linux target. This should be used |
| instead of calling add_target directly. */ |
| void linux_nat_add_target (struct target_ops *); |
| |
| /* Register a method to call whenever a new thread is attached. */ |
| void linux_nat_set_new_thread (struct target_ops *, void (*) (ptid_t)); |
| |
| /* Update linux-nat internal state when changing from one fork |
| to another. */ |
| void linux_nat_switch_fork (ptid_t new_ptid); |
| |
| /* Return the saved siginfo associated with PTID. */ |
| struct siginfo *linux_nat_get_siginfo (ptid_t ptid); |