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0274a8ce 1/* Native debugging support for GNU/Linux (LWP layer).
10d6c8cd 2
6aba47ca 3 Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
10d6c8cd 4 Free Software Foundation, Inc.
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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
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20 Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
0274a8ce 22
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23#include "target.h"
24
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25/* Structure describing an LWP. */
26
27struct 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
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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
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64 /* Next LWP in list. */
65 struct lwp_info *next;
66};
67
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68/* Attempt to initialize libthread_db. */
69void check_for_thread_db (void);
0274a8ce 70
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71/* Tell the thread_db layer what native target operations to use. */
72void thread_db_init (struct target_ops *);
73
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74/* Find process PID's pending signal set from /proc/pid/status. */
75void linux_proc_pending_signals (int pid, sigset_t *pending, sigset_t *blocked, sigset_t *ignored);
76
4de4c07c 77/* linux-nat functions for handling fork events. */
4de4c07c 78extern void linux_enable_event_reporting (ptid_t ptid);
0274a8ce 79
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80extern int lin_lwp_attach_lwp (ptid_t ptid, int verbose);
81
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82/* Iterator function for lin-lwp's lwp list. */
83struct lwp_info *iterate_over_lwps (int (*callback) (struct lwp_info *,
84 void *),
85 void *data);
10d6c8cd 86
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87/* Create a prototype generic GNU/Linux target. The client can
88 override it with local methods. */
10d6c8cd 89struct target_ops * linux_target (void);
f973ed9c 90
155bd5d1 91/* Register the customized GNU/Linux target. This should be used
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92 instead of calling add_target directly. */
93void linux_nat_add_target (struct target_ops *);
94
95/* Update linux-nat internal state when changing from one fork
96 to another. */
97void linux_nat_switch_fork (ptid_t new_ptid);