| /* Linux-specific PROCFS manipulation routines. |
| Copyright (C) 2009-2012 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #ifdef GDBSERVER |
| #include "server.h" |
| #else |
| #include "defs.h" |
| #include "gdb_string.h" |
| #endif |
| |
| #include "linux-procfs.h" |
| |
| /* Return the TGID of LWPID from /proc/pid/status. Returns -1 if not |
| found. */ |
| |
| int |
| linux_proc_get_tgid (int lwpid) |
| { |
| FILE *status_file; |
| char buf[100]; |
| int tgid = -1; |
| |
| snprintf (buf, sizeof (buf), "/proc/%d/status", (int) lwpid); |
| status_file = fopen (buf, "r"); |
| if (status_file != NULL) |
| { |
| while (fgets (buf, sizeof (buf), status_file)) |
| { |
| if (strncmp (buf, "Tgid:", 5) == 0) |
| { |
| tgid = strtoul (buf + strlen ("Tgid:"), NULL, 10); |
| break; |
| } |
| } |
| |
| fclose (status_file); |
| } |
| |
| return tgid; |
| } |
| |
| /* Detect `T (stopped)' in `/proc/PID/status'. |
| Other states including `T (tracing stop)' are reported as false. */ |
| |
| int |
| linux_proc_pid_is_stopped (pid_t pid) |
| { |
| FILE *status_file; |
| char buf[100]; |
| int retval = 0; |
| |
| snprintf (buf, sizeof (buf), "/proc/%d/status", (int) pid); |
| status_file = fopen (buf, "r"); |
| if (status_file != NULL) |
| { |
| int have_state = 0; |
| |
| while (fgets (buf, sizeof (buf), status_file)) |
| { |
| if (strncmp (buf, "State:", 6) == 0) |
| { |
| have_state = 1; |
| break; |
| } |
| } |
| if (have_state && strstr (buf, "T (stopped)") != NULL) |
| retval = 1; |
| fclose (status_file); |
| } |
| return retval; |
| } |