1 /* Linux-specific PROCFS manipulation routines. 2 Copyright (C) 2011-2016 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 extern int linux_proc_pid_is_trace_stopped_nowarn (pid_t pid); 40 41 /* Return non-zero if PID is a zombie. Failure to open the 42 /proc/pid/status file results in a warning. */ 43 44 extern int linux_proc_pid_is_zombie (pid_t pid); 45 46 /* Return non-zero if PID is a zombie. Does not warn on failure to 47 open the /proc file. */ 48 49 extern int linux_proc_pid_is_zombie_nowarn (pid_t pid); 50 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. */ 54 55 extern int linux_proc_pid_is_gone (pid_t pid); 56 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. */ 61 62 extern const char *linux_proc_tid_get_name (ptid_t ptid); 63 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); 68 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); 73 74 /* Return true if the /proc/PID/task/ directory exists. */ 75 extern int linux_proc_task_list_dir_exists (pid_t pid); 76 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. */ 80 81 extern char *linux_proc_pid_to_exec_file (int pid); 82 83 #endif /* COMMON_LINUX_PROCFS_H */ 84