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13da1c97 | 1 | /* Linux-specific PROCFS manipulation routines. |
0b302171 | 2 | Copyright (C) 2009-2012 Free Software Foundation, Inc. |
13da1c97 LM |
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 | #ifdef GDBSERVER | |
20 | #include "server.h" | |
21 | #else | |
22 | #include "defs.h" | |
23 | #include "gdb_string.h" | |
24 | #endif | |
25 | ||
26 | #include "linux-procfs.h" | |
27 | ||
28 | /* Return the TGID of LWPID from /proc/pid/status. Returns -1 if not | |
29 | found. */ | |
30 | ||
31 | int | |
32 | linux_proc_get_tgid (int lwpid) | |
33 | { | |
34 | FILE *status_file; | |
35 | char buf[100]; | |
36 | int tgid = -1; | |
37 | ||
38 | snprintf (buf, sizeof (buf), "/proc/%d/status", (int) lwpid); | |
39 | status_file = fopen (buf, "r"); | |
40 | if (status_file != NULL) | |
41 | { | |
42 | while (fgets (buf, sizeof (buf), status_file)) | |
43 | { | |
44 | if (strncmp (buf, "Tgid:", 5) == 0) | |
45 | { | |
46 | tgid = strtoul (buf + strlen ("Tgid:"), NULL, 10); | |
47 | break; | |
48 | } | |
49 | } | |
50 | ||
51 | fclose (status_file); | |
52 | } | |
53 | ||
54 | return tgid; | |
55 | } | |
644cebc9 PA |
56 | |
57 | /* Detect `T (stopped)' in `/proc/PID/status'. | |
58 | Other states including `T (tracing stop)' are reported as false. */ | |
59 | ||
60 | int | |
61 | linux_proc_pid_is_stopped (pid_t pid) | |
62 | { | |
63 | FILE *status_file; | |
64 | char buf[100]; | |
65 | int retval = 0; | |
66 | ||
67 | snprintf (buf, sizeof (buf), "/proc/%d/status", (int) pid); | |
68 | status_file = fopen (buf, "r"); | |
69 | if (status_file != NULL) | |
70 | { | |
71 | int have_state = 0; | |
72 | ||
73 | while (fgets (buf, sizeof (buf), status_file)) | |
74 | { | |
75 | if (strncmp (buf, "State:", 6) == 0) | |
76 | { | |
77 | have_state = 1; | |
78 | break; | |
79 | } | |
80 | } | |
81 | if (have_state && strstr (buf, "T (stopped)") != NULL) | |
82 | retval = 1; | |
83 | fclose (status_file); | |
84 | } | |
85 | return retval; | |
86 | } |