1 /* Native debugging support for GNU/Linux (LWP layer).
3 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
4 Free Software Foundation, Inc.
6 This file is part of GDB.
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.
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.
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/>. */
25 /* Structure describing an LWP. This is public only for the purposes
26 of ALL_LWPS; target-specific code should generally not access it
31 /* The process id of the LWP. This is a combination of the LWP id
32 and overall process id. */
35 /* Non-zero if this LWP is cloned. In this context "cloned" means
36 that the LWP is reporting to its parent using a signal other than
40 /* Non-zero if we sent this LWP a SIGSTOP (but the LWP didn't report
44 /* Non-zero if this LWP is stopped. */
47 /* Non-zero if this LWP will be/has been resumed. Note that an LWP
48 can be marked both as stopped and resumed at the same time. This
49 happens if we try to resume an LWP that has a wait status
50 pending. We shouldn't let the LWP run until that wait status has
51 been processed, but we should not report that wait status if GDB
52 didn't try to let the LWP run. */
55 /* If non-zero, a pending wait status. */
58 /* Non-zero if we were stepping this LWP. */
61 /* Non-zero si_signo if this LWP stopped with a trap. si_addr may
62 be the address of a hardware watchpoint. */
63 struct siginfo siginfo;
65 /* Non-zero if we expect a duplicated SIGINT. */
68 /* If WAITSTATUS->KIND != TARGET_WAITKIND_SPURIOUS, the waitstatus
69 for this LWP's last event. This may correspond to STATUS above,
70 or to a local variable in lin_lwp_wait. */
71 struct target_waitstatus waitstatus;
73 /* Next LWP in list. */
74 struct lwp_info *next;
77 /* The global list of LWPs, for ALL_LWPS. Unlike the threads list,
78 there is always at least one LWP on the list while the GNU/Linux
79 native target is active. */
80 extern struct lwp_info *lwp_list;
82 /* Iterate over the PTID each active thread (light-weight process). There
83 must be at least one. */
84 #define ALL_LWPS(LP, PTID) \
85 for ((LP) = lwp_list, (PTID) = (LP)->ptid; \
87 (LP) = (LP)->next, (PTID) = (LP) ? (LP)->ptid : (PTID))
89 #define GET_LWP(ptid) ptid_get_lwp (ptid)
90 #define GET_PID(ptid) ptid_get_pid (ptid)
91 #define is_lwp(ptid) (GET_LWP (ptid) != 0)
92 #define BUILD_LWP(lwp, pid) ptid_build (pid, lwp, 0)
94 /* Attempt to initialize libthread_db. */
95 void check_for_thread_db (void);
97 int thread_db_attach_lwp (ptid_t ptid);
99 /* Find process PID's pending signal set from /proc/pid/status. */
100 void linux_proc_pending_signals (int pid, sigset_t *pending, sigset_t *blocked, sigset_t *ignored);
102 /* linux-nat functions for handling fork events. */
103 extern void linux_enable_event_reporting (ptid_t ptid);
105 extern int lin_lwp_attach_lwp (ptid_t ptid);
107 /* Iterator function for lin-lwp's lwp list. */
108 struct lwp_info *iterate_over_lwps (ptid_t filter,
109 int (*callback) (struct lwp_info *,
113 /* Create a prototype generic GNU/Linux target. The client can
114 override it with local methods. */
115 struct target_ops * linux_target (void);
117 /* Create a generic GNU/Linux target using traditional
118 ptrace register access. */
120 linux_trad_target (CORE_ADDR (*register_u_offset)(struct gdbarch *, int, int));
122 /* Register the customized GNU/Linux target. This should be used
123 instead of calling add_target directly. */
124 void linux_nat_add_target (struct target_ops *);
126 /* Register a method to call whenever a new thread is attached. */
127 void linux_nat_set_new_thread (struct target_ops *, void (*) (ptid_t));
129 /* Register a method that converts a siginfo object between the layout
130 that ptrace returns, and the layout in the architecture of the
132 void linux_nat_set_siginfo_fixup (struct target_ops *,
133 int (*) (struct siginfo *,
137 /* Update linux-nat internal state when changing from one fork
139 void linux_nat_switch_fork (ptid_t new_ptid);
141 /* Return the saved siginfo associated with PTID. */
142 struct siginfo *linux_nat_get_siginfo (ptid_t ptid);