Linux: on attach, attach to lwps listed under /proc/$pid/task/
[deliverable/binutils-gdb.git] / gdb / nat / linux-procfs.h
1 /* Linux-specific PROCFS manipulation routines.
2 Copyright (C) 2011-2015 Free Software Foundation, Inc.
3
4 This file is part of GDB.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
18
19 #ifndef COMMON_LINUX_PROCFS_H
20 #define COMMON_LINUX_PROCFS_H
21
22 #include <unistd.h>
23
24 /* Return the TGID of LWPID from /proc/pid/status. Returns -1 if not
25 found. Failure to open the /proc file results in a warning. */
26
27 extern int linux_proc_get_tgid (pid_t lwpid);
28
29 /* Return the TracerPid of LWPID from /proc/pid/status. Returns -1 if
30 not found. Does not warn on failure to open the /proc file. */
31
32 extern pid_t linux_proc_get_tracerpid_nowarn (pid_t lwpid);
33
34 /* Detect `T (stopped)' in `/proc/PID/status'.
35 Other states including `T (tracing stop)' are reported as false. */
36
37 extern int linux_proc_pid_is_stopped (pid_t pid);
38
39 /* Return non-zero if PID is a zombie. Failure to open the
40 /proc/pid/status file results in a warning. */
41
42 extern int linux_proc_pid_is_zombie (pid_t pid);
43
44 /* Return non-zero if PID is a zombie. Does not warn on failure to
45 open the /proc file. */
46
47 extern int linux_proc_pid_is_zombie_nowarn (pid_t pid);
48
49 /* Return non-zero if /proc/PID/status indicates that PID is gone
50 (i.e., in Z/Zombie or X/Dead state). Failure to open the /proc
51 file is assumed to indicate the thread is gone. */
52
53 extern int linux_proc_pid_is_gone (pid_t pid);
54
55 /* Return an opaque string identifying PID's NS namespace or NULL if
56 * the information is unavailable. The returned string must be
57 * released with xfree. */
58
59 extern char *linux_proc_pid_get_ns (pid_t pid, const char *ns);
60
61 /* Callback function for linux_proc_attach_tgid_threads. If the PTID
62 thread is not yet known, try to attach to it and return true,
63 otherwise return false. */
64 typedef int (*linux_proc_attach_lwp_func) (ptid_t ptid);
65
66 /* If PID is a tgid, scan the /proc/PID/task/ directory for existing
67 threads, and call FUNC for each thread found. */
68 extern void linux_proc_attach_tgid_threads (pid_t pid,
69 linux_proc_attach_lwp_func func);
70
71 #endif /* COMMON_LINUX_PROCFS_H */
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