1 /* Linux-specific PROCFS manipulation routines.
2 Copyright (C) 2009-2013 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/>. */
23 #include "gdb_string.h"
26 #include "linux-procfs.h"
27 #include "filestuff.h"
29 /* Return the TGID of LWPID from /proc/pid/status. Returns -1 if not
33 linux_proc_get_int (pid_t lwpid
, const char *field
)
35 size_t field_len
= strlen (field
);
40 snprintf (buf
, sizeof (buf
), "/proc/%d/status", (int) lwpid
);
41 status_file
= gdb_fopen_cloexec (buf
, "r");
42 if (status_file
== NULL
)
44 warning (_("unable to open /proc file '%s'"), buf
);
48 while (fgets (buf
, sizeof (buf
), status_file
))
49 if (strncmp (buf
, field
, field_len
) == 0 && buf
[field_len
] == ':')
51 retval
= strtol (&buf
[field_len
+ 1], NULL
, 10);
59 /* Return the TGID of LWPID from /proc/pid/status. Returns -1 if not
63 linux_proc_get_tgid (pid_t lwpid
)
65 return linux_proc_get_int (lwpid
, "Tgid");
68 /* See linux-procfs.h. */
71 linux_proc_get_tracerpid (pid_t lwpid
)
73 return linux_proc_get_int (lwpid
, "TracerPid");
76 /* Return non-zero if 'State' of /proc/PID/status contains STATE. */
79 linux_proc_pid_has_state (pid_t pid
, const char *state
)
86 xsnprintf (buffer
, sizeof (buffer
), "/proc/%d/status", (int) pid
);
87 procfile
= gdb_fopen_cloexec (buffer
, "r");
90 warning (_("unable to open /proc file '%s'"), buffer
);
95 while (fgets (buffer
, sizeof (buffer
), procfile
) != NULL
)
96 if (strncmp (buffer
, "State:", 6) == 0)
101 retval
= (have_state
&& strstr (buffer
, state
) != NULL
);
106 /* Detect `T (stopped)' in `/proc/PID/status'.
107 Other states including `T (tracing stop)' are reported as false. */
110 linux_proc_pid_is_stopped (pid_t pid
)
112 return linux_proc_pid_has_state (pid
, "T (stopped)");
115 /* See linux-procfs.h declaration. */
118 linux_proc_pid_is_zombie (pid_t pid
)
120 return linux_proc_pid_has_state (pid
, "Z (zombie)");
This page took 0.046491 seconds and 4 git commands to generate.