1 /* Linux-specific PROCFS manipulation routines.
2 Copyright (C) 2011-2019 Free Software Foundation, Inc.
4 This file is part of GDB.
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.
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.
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/>. */
19 #ifndef COMMON_LINUX_PROCFS_H
20 #define COMMON_LINUX_PROCFS_H
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. */
27 extern int linux_proc_get_tgid (pid_t lwpid);
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. */
32 extern pid_t linux_proc_get_tracerpid_nowarn (pid_t lwpid);
34 /* Detect `T (stopped)' in `/proc/PID/status'.
35 Other states including `T (tracing stop)' are reported as false. */
37 extern int linux_proc_pid_is_stopped (pid_t pid);
39 extern int linux_proc_pid_is_trace_stopped_nowarn (pid_t pid);
41 /* Return non-zero if PID is a zombie. Failure to open the
42 /proc/pid/status file results in a warning. */
44 extern int linux_proc_pid_is_zombie (pid_t pid);
46 /* Return non-zero if PID is a zombie. Does not warn on failure to
47 open the /proc file. */
49 extern int linux_proc_pid_is_zombie_nowarn (pid_t pid);
51 /* Return non-zero if /proc/PID/status indicates that PID is gone
52 (i.e., in Z/Zombie or X/Dead state). Failure to open the /proc
53 file is assumed to indicate the thread is gone. */
55 extern int linux_proc_pid_is_gone (pid_t pid);
57 /* Return a string giving the thread's name or NULL if the
58 information is unavailable. The returned value points to a statically
59 allocated buffer. The value therefore becomes invalid at the next
60 linux_proc_tid_get_name call. */
62 extern const char *linux_proc_tid_get_name (ptid_t ptid);
64 /* Callback function for linux_proc_attach_tgid_threads. If the PTID
65 thread is not yet known, try to attach to it and return true,
66 otherwise return false. */
67 typedef int (*linux_proc_attach_lwp_func) (ptid_t ptid);
69 /* If PID is a tgid, scan the /proc/PID/task/ directory for existing
70 threads, and call FUNC for each thread found. */
71 extern void linux_proc_attach_tgid_threads (pid_t pid,
72 linux_proc_attach_lwp_func func);
74 /* Return true if the /proc/PID/task/ directory exists. */
75 extern int linux_proc_task_list_dir_exists (pid_t pid);
77 /* Return the full absolute name of the executable file that was run
78 to create the process PID. The returned value persists until this
79 function is next called. */
81 extern char *linux_proc_pid_to_exec_file (int pid);
83 /* Display possible problems on this system. Display them only once
86 extern void linux_proc_init_warnings ();
88 #endif /* COMMON_LINUX_PROCFS_H */