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old-cross-binutils/gdb/common/linux-osdata.c
Jan Kratochvil 184cd07257 Fix crash on process name "(sd-pam)" (PR 16594). 
info os processes -fsanitize=address error
https://sourceware.org/bugzilla/show_bug.cgi?id=16594

info os processes
=================================================================
==5795== ERROR: AddressSanitizer: heap-use-after-free on address
0x600600214974 at pc 0x757a92 bp 0x7fff95dd9f00 sp 0x7fff95dd9ef0
READ of size 4 at 0x600600214974 thread T0
    #0 0x757a91 in get_cores_used_by_process (.../gdb/gdb+0x757a91)

At least Fedora 20 has process(es):
 6678 ?        Ss     0:00 /usr/lib/systemd/systemd --user
 6680 ?        S      0:00  \_ (sd-pam)

and GDB "info os processes" crashes on it as /proc/6680/stat contains:

6680 ((sd-pam)) S 6678 6678 6678 0 -1 1077961024 33 0 0 0 0 0 0 0 20 0 1 0 18568 73768960 120 18446744073709551615 1 1
0 0 0 0 0 4096 0 18446744073709551615 0 0 17 6 0 0 0 0 0 0 0 0 0 0 0 0 0

and GDB fails to find the proper end of the process name "((sd-pam))".
Therefore it reads core number off-by-one (it reads 17 instead of 6) and
overruns the array.

(1) Make the process name parsing more foolproof.

(2) Do not trust the parsed number from /proc/PID/stat and verify it against
    the array size.

I noticed that 'ps' gets this right, so I've peeked at its
sources, and it just looks for the first ')' starting at
the end.

dc072aced7:proc/readproc.c

Look for stat2proc.

Given ps does that, I believe the kernel won't ever be changed
in a way that would break it.  So it sounds like could do strrchr
from the end of stat just as well without worry, which is simpler.

gdb/
2014-02-21  Jan Kratochvil  <jan.kratochvil@redhat.com>

	PR gdb/16594
	* common/linux-osdata.c (linux_common_core_of_thread): Find the end of
	process name.
	(get_cores_used_by_process): New parameter num_cores, use it.
	(linux_xfer_osdata_processes): Pass num_cores to it.
	* linux-tdep.c (linux_info_proc, linux_fill_prpsinfo): Find the end of
	process name.

Message-ID: <20140217212826.GA15080@host2.jankratochvil.net>
2014-02-21 18:39:40 +01:00

1634 lines
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/* Linux-specific functions to retrieve OS data.
Copyright (C) 2009-2014 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"
#endif
#include "linux-osdata.h"
#include <sys/types.h>
#include <sys/sysinfo.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <utmp.h>
#include <time.h>
#include <unistd.h>
#include <pwd.h>
#include <grp.h>
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "xml-utils.h"
#include "buffer.h"
#include "gdb_assert.h"
#include <dirent.h>
#include <sys/stat.h>
#include "filestuff.h"
#define NAMELEN(dirent) strlen ((dirent)->d_name)
/* Define PID_T to be a fixed size that is at least as large as pid_t,
so that reading pid values embedded in /proc works
consistently. */
typedef long long PID_T;
/* Define TIME_T to be at least as large as time_t, so that reading
time values embedded in /proc works consistently. */
typedef long long TIME_T;
#define MAX_PID_T_STRLEN (sizeof ("-9223372036854775808") - 1)
/* Returns the CPU core that thread PTID is currently running on. */
/* Compute and return the processor core of a given thread. */
int
linux_common_core_of_thread (ptid_t ptid)
{
char filename[sizeof ("/proc//task//stat") + 2 * MAX_PID_T_STRLEN];
FILE *f;
char *content = NULL;
char *p;
char *ts = 0;
int content_read = 0;
int i;
int core;
sprintf (filename, "/proc/%lld/task/%lld/stat",
(PID_T) ptid_get_pid (ptid), (PID_T) ptid_get_lwp (ptid));
f = gdb_fopen_cloexec (filename, "r");
if (!f)
return -1;
for (;;)
{
int n;
content = xrealloc (content, content_read + 1024);
n = fread (content + content_read, 1, 1024, f);
content_read += n;
if (n < 1024)
{
content[content_read] = '\0';
break;
}
}
/* ps command also relies on no trailing fields ever contain ')'. */
p = strrchr (content, ')');
if (p != NULL)
p++;
/* If the first field after program name has index 0, then core number is
the field with index 36. There's no constant for that anywhere. */
if (p != NULL)
p = strtok_r (p, " ", &ts);
for (i = 0; p != NULL && i != 36; ++i)
p = strtok_r (NULL, " ", &ts);
if (p == NULL || sscanf (p, "%d", &core) == 0)
core = -1;
xfree (content);
fclose (f);
return core;
}
/* Finds the command-line of process PID and copies it into COMMAND.
At most MAXLEN characters are copied. If the command-line cannot
be found, PID is copied into command in text-form. */
static void
command_from_pid (char *command, int maxlen, PID_T pid)
{
char *stat_path = xstrprintf ("/proc/%lld/stat", pid);
FILE *fp = gdb_fopen_cloexec (stat_path, "r");
command[0] = '\0';
if (fp)
{
/* sizeof (cmd) should be greater or equal to TASK_COMM_LEN (in
include/linux/sched.h in the Linux kernel sources) plus two
(for the brackets). */
char cmd[18];
PID_T stat_pid;
int items_read = fscanf (fp, "%lld %17s", &stat_pid, cmd);
if (items_read == 2 && pid == stat_pid)
{
cmd[strlen (cmd) - 1] = '\0'; /* Remove trailing parenthesis. */
strncpy (command, cmd + 1, maxlen); /* Ignore leading parenthesis. */
}
fclose (fp);
}
else
{
/* Return the PID if a /proc entry for the process cannot be found. */
snprintf (command, maxlen, "%lld", pid);
}
command[maxlen - 1] = '\0'; /* Ensure string is null-terminated. */
xfree (stat_path);
}
/* Returns the command-line of the process with the given PID. The
returned string needs to be freed using xfree after use. */
static char *
commandline_from_pid (PID_T pid)
{
char *pathname = xstrprintf ("/proc/%lld/cmdline", pid);
char *commandline = NULL;
FILE *f = gdb_fopen_cloexec (pathname, "r");
if (f)
{
size_t len = 0;
while (!feof (f))
{
char buf[1024];
size_t read_bytes = fread (buf, 1, sizeof (buf), f);
if (read_bytes)
{
commandline = (char *) xrealloc (commandline, len + read_bytes + 1);
memcpy (commandline + len, buf, read_bytes);
len += read_bytes;
}
}
fclose (f);
if (commandline)
{
size_t i;
/* Replace null characters with spaces. */
for (i = 0; i < len; ++i)
if (commandline[i] == '\0')
commandline[i] = ' ';
commandline[len] = '\0';
}
else
{
/* Return the command in square brackets if the command-line
is empty. */
commandline = (char *) xmalloc (32);
commandline[0] = '[';
command_from_pid (commandline + 1, 31, pid);
len = strlen (commandline);
if (len < 31)
strcat (commandline, "]");
}
}
xfree (pathname);
return commandline;
}
/* Finds the user name for the user UID and copies it into USER. At
most MAXLEN characters are copied. */
static void
user_from_uid (char *user, int maxlen, uid_t uid)
{
struct passwd *pwentry = getpwuid (uid);
if (pwentry)
{
strncpy (user, pwentry->pw_name, maxlen);
/* Ensure that the user name is null-terminated. */
user[maxlen - 1] = '\0';
}
else
user[0] = '\0';
}
/* Finds the owner of process PID and returns the user id in OWNER.
Returns 0 if the owner was found, -1 otherwise. */
static int
get_process_owner (uid_t *owner, PID_T pid)
{
struct stat statbuf;
char procentry[sizeof ("/proc/") + MAX_PID_T_STRLEN];
sprintf (procentry, "/proc/%lld", pid);
if (stat (procentry, &statbuf) == 0 && S_ISDIR (statbuf.st_mode))
{
*owner = statbuf.st_uid;
return 0;
}
else
return -1;
}
/* Find the CPU cores used by process PID and return them in CORES.
CORES points to an array of NUM_CORES elements. */
static int
get_cores_used_by_process (PID_T pid, int *cores, const int num_cores)
{
char taskdir[sizeof ("/proc/") + MAX_PID_T_STRLEN + sizeof ("/task") - 1];
DIR *dir;
struct dirent *dp;
int task_count = 0;
sprintf (taskdir, "/proc/%lld/task", pid);
dir = opendir (taskdir);
if (dir)
{
while ((dp = readdir (dir)) != NULL)
{
PID_T tid;
int core;
if (!isdigit (dp->d_name[0])
|| NAMELEN (dp) > MAX_PID_T_STRLEN)
continue;
sscanf (dp->d_name, "%lld", &tid);
core = linux_common_core_of_thread (ptid_build ((pid_t) pid,
(pid_t) tid, 0));
if (core >= 0 && core < num_cores)
{
++cores[core];
++task_count;
}
}
closedir (dir);
}
return task_count;
}
static LONGEST
linux_xfer_osdata_processes (gdb_byte *readbuf,
ULONGEST offset, ULONGEST len)
{
/* We make the process list snapshot when the object starts to be read. */
static const char *buf;
static LONGEST len_avail = -1;
static struct buffer buffer;
if (offset == 0)
{
DIR *dirp;
if (len_avail != -1 && len_avail != 0)
buffer_free (&buffer);
len_avail = 0;
buf = NULL;
buffer_init (&buffer);
buffer_grow_str (&buffer, "<osdata type=\"processes\">\n");
dirp = opendir ("/proc");
if (dirp)
{
const int num_cores = sysconf (_SC_NPROCESSORS_ONLN);
struct dirent *dp;
while ((dp = readdir (dirp)) != NULL)
{
PID_T pid;
uid_t owner;
char user[UT_NAMESIZE];
char *command_line;
int *cores;
int task_count;
char *cores_str;
int i;
if (!isdigit (dp->d_name[0])
|| NAMELEN (dp) > MAX_PID_T_STRLEN)
continue;
sscanf (dp->d_name, "%lld", &pid);
command_line = commandline_from_pid (pid);
if (get_process_owner (&owner, pid) == 0)
user_from_uid (user, sizeof (user), owner);
else
strcpy (user, "?");
/* Find CPU cores used by the process. */
cores = (int *) xcalloc (num_cores, sizeof (int));
task_count = get_cores_used_by_process (pid, cores, num_cores);
cores_str = (char *) xcalloc (task_count, sizeof ("4294967295") + 1);
for (i = 0; i < num_cores && task_count > 0; ++i)
if (cores[i])
{
char core_str[sizeof ("4294967295")];
sprintf (core_str, "%d", i);
strcat (cores_str, core_str);
task_count -= cores[i];
if (task_count > 0)
strcat (cores_str, ",");
}
xfree (cores);
buffer_xml_printf (
&buffer,
"<item>"
"<column name=\"pid\">%lld</column>"
"<column name=\"user\">%s</column>"
"<column name=\"command\">%s</column>"
"<column name=\"cores\">%s</column>"
"</item>",
pid,
user,
command_line ? command_line : "",
cores_str);
xfree (command_line);
xfree (cores_str);
}
closedir (dirp);
}
buffer_grow_str0 (&buffer, "</osdata>\n");
buf = buffer_finish (&buffer);
len_avail = strlen (buf);
}
if (offset >= len_avail)
{
/* Done. Get rid of the buffer. */
buffer_free (&buffer);
buf = NULL;
len_avail = 0;
return 0;
}
if (len > len_avail - offset)
len = len_avail - offset;
memcpy (readbuf, buf + offset, len);
return len;
}
/* Auxiliary function used by qsort to sort processes by process
group. Compares two processes with ids PROCESS1 and PROCESS2.
PROCESS1 comes before PROCESS2 if it has a lower process group id.
If they belong to the same process group, PROCESS1 comes before
PROCESS2 if it has a lower process id or is the process group
leader. */
static int
compare_processes (const void *process1, const void *process2)
{
PID_T pid1 = *((PID_T *) process1);
PID_T pid2 = *((PID_T *) process2);
PID_T pgid1 = *((PID_T *) process1 + 1);
PID_T pgid2 = *((PID_T *) process2 + 1);
/* Sort by PGID. */
if (pgid1 < pgid2)
return -1;
else if (pgid1 > pgid2)
return 1;
else
{
/* Process group leaders always come first, else sort by PID. */
if (pid1 == pgid1)
return -1;
else if (pid2 == pgid2)
return 1;
else if (pid1 < pid2)
return -1;
else if (pid1 > pid2)
return 1;
else
return 0;
}
}
/* Collect all process groups from /proc. */
static LONGEST
linux_xfer_osdata_processgroups (gdb_byte *readbuf,
ULONGEST offset, ULONGEST len)
{
/* We make the process list snapshot when the object starts to be read. */
static const char *buf;
static LONGEST len_avail = -1;
static struct buffer buffer;
if (offset == 0)
{
DIR *dirp;
if (len_avail != -1 && len_avail != 0)
buffer_free (&buffer);
len_avail = 0;
buf = NULL;
buffer_init (&buffer);
buffer_grow_str (&buffer, "<osdata type=\"process groups\">\n");
dirp = opendir ("/proc");
if (dirp)
{
struct dirent *dp;
const size_t list_block_size = 512;
PID_T *process_list = (PID_T *) xmalloc (list_block_size * 2 * sizeof (PID_T));
size_t process_count = 0;
size_t i;
/* Build list consisting of PIDs followed by their
associated PGID. */
while ((dp = readdir (dirp)) != NULL)
{
PID_T pid, pgid;
if (!isdigit (dp->d_name[0])
|| NAMELEN (dp) > MAX_PID_T_STRLEN)
continue;
sscanf (dp->d_name, "%lld", &pid);
pgid = getpgid (pid);
if (pgid > 0)
{
process_list[2 * process_count] = pid;
process_list[2 * process_count + 1] = pgid;
++process_count;
/* Increase the size of the list if necessary. */
if (process_count % list_block_size == 0)
process_list = (PID_T *) xrealloc (
process_list,
(process_count + list_block_size)
* 2 * sizeof (PID_T));
}
}
closedir (dirp);
/* Sort the process list. */
qsort (process_list, process_count, 2 * sizeof (PID_T),
compare_processes);
for (i = 0; i < process_count; ++i)
{
PID_T pid = process_list[2 * i];
PID_T pgid = process_list[2 * i + 1];
char leader_command[32];
char *command_line;
command_from_pid (leader_command, sizeof (leader_command), pgid);
command_line = commandline_from_pid (pid);
buffer_xml_printf (
&buffer,
"<item>"
"<column name=\"pgid\">%lld</column>"
"<column name=\"leader command\">%s</column>"
"<column name=\"pid\">%lld</column>"
"<column name=\"command line\">%s</column>"
"</item>",
pgid,
leader_command,
pid,
command_line ? command_line : "");
xfree (command_line);
}
xfree (process_list);
}
buffer_grow_str0 (&buffer, "</osdata>\n");
buf = buffer_finish (&buffer);
len_avail = strlen (buf);
}
if (offset >= len_avail)
{
/* Done. Get rid of the buffer. */
buffer_free (&buffer);
buf = NULL;
len_avail = 0;
return 0;
}
if (len > len_avail - offset)
len = len_avail - offset;
memcpy (readbuf, buf + offset, len);
return len;
}
/* Collect all the threads in /proc by iterating through processes and
then tasks within each process. */
static LONGEST
linux_xfer_osdata_threads (gdb_byte *readbuf,
ULONGEST offset, ULONGEST len)
{
/* We make the process list snapshot when the object starts to be read. */
static const char *buf;
static LONGEST len_avail = -1;
static struct buffer buffer;
if (offset == 0)
{
DIR *dirp;
if (len_avail != -1 && len_avail != 0)
buffer_free (&buffer);
len_avail = 0;
buf = NULL;
buffer_init (&buffer);
buffer_grow_str (&buffer, "<osdata type=\"threads\">\n");
dirp = opendir ("/proc");
if (dirp)
{
struct dirent *dp;
while ((dp = readdir (dirp)) != NULL)
{
struct stat statbuf;
char procentry[sizeof ("/proc/4294967295")];
if (!isdigit (dp->d_name[0])
|| NAMELEN (dp) > sizeof ("4294967295") - 1)
continue;
sprintf (procentry, "/proc/%s", dp->d_name);
if (stat (procentry, &statbuf) == 0
&& S_ISDIR (statbuf.st_mode))
{
DIR *dirp2;
char *pathname;
PID_T pid;
char command[32];
pathname = xstrprintf ("/proc/%s/task", dp->d_name);
pid = atoi (dp->d_name);
command_from_pid (command, sizeof (command), pid);
dirp2 = opendir (pathname);
if (dirp2)
{
struct dirent *dp2;
while ((dp2 = readdir (dirp2)) != NULL)
{
PID_T tid;
int core;
if (!isdigit (dp2->d_name[0])
|| NAMELEN (dp2) > sizeof ("4294967295") - 1)
continue;
tid = atoi (dp2->d_name);
core = linux_common_core_of_thread (ptid_build (pid, tid, 0));
buffer_xml_printf (
&buffer,
"<item>"
"<column name=\"pid\">%lld</column>"
"<column name=\"command\">%s</column>"
"<column name=\"tid\">%lld</column>"
"<column name=\"core\">%d</column>"
"</item>",
pid,
command,
tid,
core);
}
closedir (dirp2);
}
xfree (pathname);
}
}
closedir (dirp);
}
buffer_grow_str0 (&buffer, "</osdata>\n");
buf = buffer_finish (&buffer);
len_avail = strlen (buf);
}
if (offset >= len_avail)
{
/* Done. Get rid of the buffer. */
buffer_free (&buffer);
buf = NULL;
len_avail = 0;
return 0;
}
if (len > len_avail - offset)
len = len_avail - offset;
memcpy (readbuf, buf + offset, len);
return len;
}
/* Collect all the open file descriptors found in /proc and put the details
found about them into READBUF. */
static LONGEST
linux_xfer_osdata_fds (gdb_byte *readbuf,
ULONGEST offset, ULONGEST len)
{
/* We make the process list snapshot when the object starts to be read. */
static const char *buf;
static LONGEST len_avail = -1;
static struct buffer buffer;
if (offset == 0)
{
DIR *dirp;
if (len_avail != -1 && len_avail != 0)
buffer_free (&buffer);
len_avail = 0;
buf = NULL;
buffer_init (&buffer);
buffer_grow_str (&buffer, "<osdata type=\"files\">\n");
dirp = opendir ("/proc");
if (dirp)
{
struct dirent *dp;
while ((dp = readdir (dirp)) != NULL)
{
struct stat statbuf;
char procentry[sizeof ("/proc/4294967295")];
if (!isdigit (dp->d_name[0])
|| NAMELEN (dp) > sizeof ("4294967295") - 1)
continue;
sprintf (procentry, "/proc/%s", dp->d_name);
if (stat (procentry, &statbuf) == 0
&& S_ISDIR (statbuf.st_mode))
{
char *pathname;
DIR *dirp2;
PID_T pid;
char command[32];
pid = atoi (dp->d_name);
command_from_pid (command, sizeof (command), pid);
pathname = xstrprintf ("/proc/%s/fd", dp->d_name);
dirp2 = opendir (pathname);
if (dirp2)
{
struct dirent *dp2;
while ((dp2 = readdir (dirp2)) != NULL)
{
char *fdname;
char buf[1000];
ssize_t rslt;
if (!isdigit (dp2->d_name[0]))
continue;
fdname = xstrprintf ("%s/%s", pathname, dp2->d_name);
rslt = readlink (fdname, buf, sizeof (buf) - 1);
if (rslt >= 0)
buf[rslt] = '\0';
buffer_xml_printf (
&buffer,
"<item>"
"<column name=\"pid\">%s</column>"
"<column name=\"command\">%s</column>"
"<column name=\"file descriptor\">%s</column>"
"<column name=\"name\">%s</column>"
"</item>",
dp->d_name,
command,
dp2->d_name,
(rslt >= 0 ? buf : dp2->d_name));
}
closedir (dirp2);
}
xfree (pathname);
}
}
closedir (dirp);
}
buffer_grow_str0 (&buffer, "</osdata>\n");
buf = buffer_finish (&buffer);
len_avail = strlen (buf);
}
if (offset >= len_avail)
{
/* Done. Get rid of the buffer. */
buffer_free (&buffer);
buf = NULL;
len_avail = 0;
return 0;
}
if (len > len_avail - offset)
len = len_avail - offset;
memcpy (readbuf, buf + offset, len);
return len;
}
/* Returns the socket state STATE in textual form. */
static const char *
format_socket_state (unsigned char state)
{
/* Copied from include/net/tcp_states.h in the Linux kernel sources. */
enum {
TCP_ESTABLISHED = 1,
TCP_SYN_SENT,
TCP_SYN_RECV,
TCP_FIN_WAIT1,
TCP_FIN_WAIT2,
TCP_TIME_WAIT,
TCP_CLOSE,
TCP_CLOSE_WAIT,
TCP_LAST_ACK,
TCP_LISTEN,
TCP_CLOSING
};
switch (state)
{
case TCP_ESTABLISHED:
return "ESTABLISHED";
case TCP_SYN_SENT:
return "SYN_SENT";
case TCP_SYN_RECV:
return "SYN_RECV";
case TCP_FIN_WAIT1:
return "FIN_WAIT1";
case TCP_FIN_WAIT2:
return "FIN_WAIT2";
case TCP_TIME_WAIT:
return "TIME_WAIT";
case TCP_CLOSE:
return "CLOSE";
case TCP_CLOSE_WAIT:
return "CLOSE_WAIT";
case TCP_LAST_ACK:
return "LAST_ACK";
case TCP_LISTEN:
return "LISTEN";
case TCP_CLOSING:
return "CLOSING";
default:
return "(unknown)";
}
}
union socket_addr
{
struct sockaddr sa;
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
};
/* Auxiliary function used by linux_xfer_osdata_isocket. Formats
information for all open internet sockets of type FAMILY on the
system into BUFFER. If TCP is set, only TCP sockets are processed,
otherwise only UDP sockets are processed. */
static void
print_sockets (unsigned short family, int tcp, struct buffer *buffer)
{
const char *proc_file;
FILE *fp;
if (family == AF_INET)
proc_file = tcp ? "/proc/net/tcp" : "/proc/net/udp";
else if (family == AF_INET6)
proc_file = tcp ? "/proc/net/tcp6" : "/proc/net/udp6";
else
return;
fp = gdb_fopen_cloexec (proc_file, "r");
if (fp)
{
char buf[8192];
do
{
if (fgets (buf, sizeof (buf), fp))
{
uid_t uid;
unsigned int local_port, remote_port, state;
char local_address[NI_MAXHOST], remote_address[NI_MAXHOST];
int result;
#if NI_MAXHOST <= 32
#error "local_address and remote_address buffers too small"
#endif
result = sscanf (buf,
"%*d: %32[0-9A-F]:%X %32[0-9A-F]:%X %X %*X:%*X %*X:%*X %*X %d %*d %*u %*s\n",
local_address, &local_port,
remote_address, &remote_port,
&state,
&uid);
if (result == 6)
{
union socket_addr locaddr, remaddr;
size_t addr_size;
char user[UT_NAMESIZE];
char local_service[NI_MAXSERV], remote_service[NI_MAXSERV];
if (family == AF_INET)
{
sscanf (local_address, "%X",
&locaddr.sin.sin_addr.s_addr);
sscanf (remote_address, "%X",
&remaddr.sin.sin_addr.s_addr);
locaddr.sin.sin_port = htons (local_port);
remaddr.sin.sin_port = htons (remote_port);
addr_size = sizeof (struct sockaddr_in);
}
else
{
sscanf (local_address, "%8X%8X%8X%8X",
locaddr.sin6.sin6_addr.s6_addr32,
locaddr.sin6.sin6_addr.s6_addr32 + 1,
locaddr.sin6.sin6_addr.s6_addr32 + 2,
locaddr.sin6.sin6_addr.s6_addr32 + 3);
sscanf (remote_address, "%8X%8X%8X%8X",
remaddr.sin6.sin6_addr.s6_addr32,
remaddr.sin6.sin6_addr.s6_addr32 + 1,
remaddr.sin6.sin6_addr.s6_addr32 + 2,
remaddr.sin6.sin6_addr.s6_addr32 + 3);
locaddr.sin6.sin6_port = htons (local_port);
remaddr.sin6.sin6_port = htons (remote_port);
locaddr.sin6.sin6_flowinfo = 0;
remaddr.sin6.sin6_flowinfo = 0;
locaddr.sin6.sin6_scope_id = 0;
remaddr.sin6.sin6_scope_id = 0;
addr_size = sizeof (struct sockaddr_in6);
}
locaddr.sa.sa_family = remaddr.sa.sa_family = family;
result = getnameinfo (&locaddr.sa, addr_size,
local_address, sizeof (local_address),
local_service, sizeof (local_service),
NI_NUMERICHOST | NI_NUMERICSERV
| (tcp ? 0 : NI_DGRAM));
if (result)
continue;
result = getnameinfo (&remaddr.sa, addr_size,
remote_address,
sizeof (remote_address),
remote_service,
sizeof (remote_service),
NI_NUMERICHOST | NI_NUMERICSERV
| (tcp ? 0 : NI_DGRAM));
if (result)
continue;
user_from_uid (user, sizeof (user), uid);
buffer_xml_printf (
buffer,
"<item>"
"<column name=\"local address\">%s</column>"
"<column name=\"local port\">%s</column>"
"<column name=\"remote address\">%s</column>"
"<column name=\"remote port\">%s</column>"
"<column name=\"state\">%s</column>"
"<column name=\"user\">%s</column>"
"<column name=\"family\">%s</column>"
"<column name=\"protocol\">%s</column>"
"</item>",
local_address,
local_service,
remote_address,
remote_service,
format_socket_state (state),
user,
(family == AF_INET) ? "INET" : "INET6",
tcp ? "STREAM" : "DGRAM");
}
}
}
while (!feof (fp));
fclose (fp);
}
}
/* Collect data about internet sockets and write it into READBUF. */
static LONGEST
linux_xfer_osdata_isockets (gdb_byte *readbuf,
ULONGEST offset, ULONGEST len)
{
static const char *buf;
static LONGEST len_avail = -1;
static struct buffer buffer;
if (offset == 0)
{
if (len_avail != -1 && len_avail != 0)
buffer_free (&buffer);
len_avail = 0;
buf = NULL;
buffer_init (&buffer);
buffer_grow_str (&buffer, "<osdata type=\"I sockets\">\n");
print_sockets (AF_INET, 1, &buffer);
print_sockets (AF_INET, 0, &buffer);
print_sockets (AF_INET6, 1, &buffer);
print_sockets (AF_INET6, 0, &buffer);
buffer_grow_str0 (&buffer, "</osdata>\n");
buf = buffer_finish (&buffer);
len_avail = strlen (buf);
}
if (offset >= len_avail)
{
/* Done. Get rid of the buffer. */
buffer_free (&buffer);
buf = NULL;
len_avail = 0;
return 0;
}
if (len > len_avail - offset)
len = len_avail - offset;
memcpy (readbuf, buf + offset, len);
return len;
}
/* Converts the time SECONDS into textual form and copies it into a
buffer TIME, with at most MAXLEN characters copied. */
static void
time_from_time_t (char *time, int maxlen, TIME_T seconds)
{
if (!seconds)
time[0] = '\0';
else
{
time_t t = (time_t) seconds;
strncpy (time, ctime (&t), maxlen);
time[maxlen - 1] = '\0';
}
}
/* Finds the group name for the group GID and copies it into GROUP.
At most MAXLEN characters are copied. */
static void
group_from_gid (char *group, int maxlen, gid_t gid)
{
struct group *grentry = getgrgid (gid);
if (grentry)
{
strncpy (group, grentry->gr_name, maxlen);
/* Ensure that the group name is null-terminated. */
group[maxlen - 1] = '\0';
}
else
group[0] = '\0';
}
/* Collect data about shared memory recorded in /proc and write it
into READBUF. */
static LONGEST
linux_xfer_osdata_shm (gdb_byte *readbuf,
ULONGEST offset, ULONGEST len)
{
static const char *buf;
static LONGEST len_avail = -1;
static struct buffer buffer;
if (offset == 0)
{
FILE *fp;
if (len_avail != -1 && len_avail != 0)
buffer_free (&buffer);
len_avail = 0;
buf = NULL;
buffer_init (&buffer);
buffer_grow_str (&buffer, "<osdata type=\"shared memory\">\n");
fp = gdb_fopen_cloexec ("/proc/sysvipc/shm", "r");
if (fp)
{
char buf[8192];
do
{
if (fgets (buf, sizeof (buf), fp))
{
key_t key;
uid_t uid, cuid;
gid_t gid, cgid;
PID_T cpid, lpid;
int shmid, size, nattch;
TIME_T atime, dtime, ctime;
unsigned int perms;
int items_read;
items_read = sscanf (buf,
"%d %d %o %d %lld %lld %d %u %u %u %u %lld %lld %lld",
&key, &shmid, &perms, &size,
&cpid, &lpid,
&nattch,
&uid, &gid, &cuid, &cgid,
&atime, &dtime, &ctime);
if (items_read == 14)
{
char user[UT_NAMESIZE], group[UT_NAMESIZE];
char cuser[UT_NAMESIZE], cgroup[UT_NAMESIZE];
char ccmd[32], lcmd[32];
char atime_str[32], dtime_str[32], ctime_str[32];
user_from_uid (user, sizeof (user), uid);
group_from_gid (group, sizeof (group), gid);
user_from_uid (cuser, sizeof (cuser), cuid);
group_from_gid (cgroup, sizeof (cgroup), cgid);
command_from_pid (ccmd, sizeof (ccmd), cpid);
command_from_pid (lcmd, sizeof (lcmd), lpid);
time_from_time_t (atime_str, sizeof (atime_str), atime);
time_from_time_t (dtime_str, sizeof (dtime_str), dtime);
time_from_time_t (ctime_str, sizeof (ctime_str), ctime);
buffer_xml_printf (
&buffer,
"<item>"
"<column name=\"key\">%d</column>"
"<column name=\"shmid\">%d</column>"
"<column name=\"permissions\">%o</column>"
"<column name=\"size\">%d</column>"
"<column name=\"creator command\">%s</column>"
"<column name=\"last op. command\">%s</column>"
"<column name=\"num attached\">%d</column>"
"<column name=\"user\">%s</column>"
"<column name=\"group\">%s</column>"
"<column name=\"creator user\">%s</column>"
"<column name=\"creator group\">%s</column>"
"<column name=\"last shmat() time\">%s</column>"
"<column name=\"last shmdt() time\">%s</column>"
"<column name=\"last shmctl() time\">%s</column>"
"</item>",
key,
shmid,
perms,
size,
ccmd,
lcmd,
nattch,
user,
group,
cuser,
cgroup,
atime_str,
dtime_str,
ctime_str);
}
}
}
while (!feof (fp));
fclose (fp);
}
buffer_grow_str0 (&buffer, "</osdata>\n");
buf = buffer_finish (&buffer);
len_avail = strlen (buf);
}
if (offset >= len_avail)
{
/* Done. Get rid of the buffer. */
buffer_free (&buffer);
buf = NULL;
len_avail = 0;
return 0;
}
if (len > len_avail - offset)
len = len_avail - offset;
memcpy (readbuf, buf + offset, len);
return len;
}
/* Collect data about semaphores recorded in /proc and write it
into READBUF. */
static LONGEST
linux_xfer_osdata_sem (gdb_byte *readbuf,
ULONGEST offset, ULONGEST len)
{
static const char *buf;
static LONGEST len_avail = -1;
static struct buffer buffer;
if (offset == 0)
{
FILE *fp;
if (len_avail != -1 && len_avail != 0)
buffer_free (&buffer);
len_avail = 0;
buf = NULL;
buffer_init (&buffer);
buffer_grow_str (&buffer, "<osdata type=\"semaphores\">\n");
fp = gdb_fopen_cloexec ("/proc/sysvipc/sem", "r");
if (fp)
{
char buf[8192];
do
{
if (fgets (buf, sizeof (buf), fp))
{
key_t key;
uid_t uid, cuid;
gid_t gid, cgid;
unsigned int perms, nsems;
int semid;
TIME_T otime, ctime;
int items_read;
items_read = sscanf (buf,
"%d %d %o %u %d %d %d %d %lld %lld",
&key, &semid, &perms, &nsems,
&uid, &gid, &cuid, &cgid,
&otime, &ctime);
if (items_read == 10)
{
char user[UT_NAMESIZE], group[UT_NAMESIZE];
char cuser[UT_NAMESIZE], cgroup[UT_NAMESIZE];
char otime_str[32], ctime_str[32];
user_from_uid (user, sizeof (user), uid);
group_from_gid (group, sizeof (group), gid);
user_from_uid (cuser, sizeof (cuser), cuid);
group_from_gid (cgroup, sizeof (cgroup), cgid);
time_from_time_t (otime_str, sizeof (otime_str), otime);
time_from_time_t (ctime_str, sizeof (ctime_str), ctime);
buffer_xml_printf (
&buffer,
"<item>"
"<column name=\"key\">%d</column>"
"<column name=\"semid\">%d</column>"
"<column name=\"permissions\">%o</column>"
"<column name=\"num semaphores\">%u</column>"
"<column name=\"user\">%s</column>"
"<column name=\"group\">%s</column>"
"<column name=\"creator user\">%s</column>"
"<column name=\"creator group\">%s</column>"
"<column name=\"last semop() time\">%s</column>"
"<column name=\"last semctl() time\">%s</column>"
"</item>",
key,
semid,
perms,
nsems,
user,
group,
cuser,
cgroup,
otime_str,
ctime_str);
}
}
}
while (!feof (fp));
fclose (fp);
}
buffer_grow_str0 (&buffer, "</osdata>\n");
buf = buffer_finish (&buffer);
len_avail = strlen (buf);
}
if (offset >= len_avail)
{
/* Done. Get rid of the buffer. */
buffer_free (&buffer);
buf = NULL;
len_avail = 0;
return 0;
}
if (len > len_avail - offset)
len = len_avail - offset;
memcpy (readbuf, buf + offset, len);
return len;
}
/* Collect data about message queues recorded in /proc and write it
into READBUF. */
static LONGEST
linux_xfer_osdata_msg (gdb_byte *readbuf,
ULONGEST offset, ULONGEST len)
{
static const char *buf;
static LONGEST len_avail = -1;
static struct buffer buffer;
if (offset == 0)
{
FILE *fp;
if (len_avail != -1 && len_avail != 0)
buffer_free (&buffer);
len_avail = 0;
buf = NULL;
buffer_init (&buffer);
buffer_grow_str (&buffer, "<osdata type=\"message queues\">\n");
fp = gdb_fopen_cloexec ("/proc/sysvipc/msg", "r");
if (fp)
{
char buf[8192];
do
{
if (fgets (buf, sizeof (buf), fp))
{
key_t key;
PID_T lspid, lrpid;
uid_t uid, cuid;
gid_t gid, cgid;
unsigned int perms, cbytes, qnum;
int msqid;
TIME_T stime, rtime, ctime;
int items_read;
items_read = sscanf (buf,
"%d %d %o %u %u %lld %lld %d %d %d %d %lld %lld %lld",
&key, &msqid, &perms, &cbytes, &qnum,
&lspid, &lrpid, &uid, &gid, &cuid, &cgid,
&stime, &rtime, &ctime);
if (items_read == 14)
{
char user[UT_NAMESIZE], group[UT_NAMESIZE];
char cuser[UT_NAMESIZE], cgroup[UT_NAMESIZE];
char lscmd[32], lrcmd[32];
char stime_str[32], rtime_str[32], ctime_str[32];
user_from_uid (user, sizeof (user), uid);
group_from_gid (group, sizeof (group), gid);
user_from_uid (cuser, sizeof (cuser), cuid);
group_from_gid (cgroup, sizeof (cgroup), cgid);
command_from_pid (lscmd, sizeof (lscmd), lspid);
command_from_pid (lrcmd, sizeof (lrcmd), lrpid);
time_from_time_t (stime_str, sizeof (stime_str), stime);
time_from_time_t (rtime_str, sizeof (rtime_str), rtime);
time_from_time_t (ctime_str, sizeof (ctime_str), ctime);
buffer_xml_printf (
&buffer,
"<item>"
"<column name=\"key\">%d</column>"
"<column name=\"msqid\">%d</column>"
"<column name=\"permissions\">%o</column>"
"<column name=\"num used bytes\">%u</column>"
"<column name=\"num messages\">%u</column>"
"<column name=\"last msgsnd() command\">%s</column>"
"<column name=\"last msgrcv() command\">%s</column>"
"<column name=\"user\">%s</column>"
"<column name=\"group\">%s</column>"
"<column name=\"creator user\">%s</column>"
"<column name=\"creator group\">%s</column>"
"<column name=\"last msgsnd() time\">%s</column>"
"<column name=\"last msgrcv() time\">%s</column>"
"<column name=\"last msgctl() time\">%s</column>"
"</item>",
key,
msqid,
perms,
cbytes,
qnum,
lscmd,
lrcmd,
user,
group,
cuser,
cgroup,
stime_str,
rtime_str,
ctime_str);
}
}
}
while (!feof (fp));
fclose (fp);
}
buffer_grow_str0 (&buffer, "</osdata>\n");
buf = buffer_finish (&buffer);
len_avail = strlen (buf);
}
if (offset >= len_avail)
{
/* Done. Get rid of the buffer. */
buffer_free (&buffer);
buf = NULL;
len_avail = 0;
return 0;
}
if (len > len_avail - offset)
len = len_avail - offset;
memcpy (readbuf, buf + offset, len);
return len;
}
/* Collect data about loaded kernel modules and write it into
READBUF. */
static LONGEST
linux_xfer_osdata_modules (gdb_byte *readbuf,
ULONGEST offset, ULONGEST len)
{
static const char *buf;
static LONGEST len_avail = -1;
static struct buffer buffer;
if (offset == 0)
{
FILE *fp;
if (len_avail != -1 && len_avail != 0)
buffer_free (&buffer);
len_avail = 0;
buf = NULL;
buffer_init (&buffer);
buffer_grow_str (&buffer, "<osdata type=\"modules\">\n");
fp = gdb_fopen_cloexec ("/proc/modules", "r");
if (fp)
{
char buf[8192];
do
{
if (fgets (buf, sizeof (buf), fp))
{
char *name, *dependencies, *status, *tmp;
unsigned int size;
unsigned long long address;
int uses;
name = strtok (buf, " ");
if (name == NULL)
continue;
tmp = strtok (NULL, " ");
if (tmp == NULL)
continue;
if (sscanf (tmp, "%u", &size) != 1)
continue;
tmp = strtok (NULL, " ");
if (tmp == NULL)
continue;
if (sscanf (tmp, "%d", &uses) != 1)
continue;
dependencies = strtok (NULL, " ");
if (dependencies == NULL)
continue;
status = strtok (NULL, " ");
if (status == NULL)
continue;
tmp = strtok (NULL, "\n");
if (tmp == NULL)
continue;
if (sscanf (tmp, "%llx", &address) != 1)
continue;
buffer_xml_printf (
&buffer,
"<item>"
"<column name=\"name\">%s</column>"
"<column name=\"size\">%u</column>"
"<column name=\"num uses\">%d</column>"
"<column name=\"dependencies\">%s</column>"
"<column name=\"status\">%s</column>"
"<column name=\"address\">%llx</column>"
"</item>",
name,
size,
uses,
dependencies,
status,
address);
}
}
while (!feof (fp));
fclose (fp);
}
buffer_grow_str0 (&buffer, "</osdata>\n");
buf = buffer_finish (&buffer);
len_avail = strlen (buf);
}
if (offset >= len_avail)
{
/* Done. Get rid of the buffer. */
buffer_free (&buffer);
buf = NULL;
len_avail = 0;
return 0;
}
if (len > len_avail - offset)
len = len_avail - offset;
memcpy (readbuf, buf + offset, len);
return len;
}
struct osdata_type {
char *type;
char *title;
char *description;
LONGEST (*getter) (gdb_byte *readbuf, ULONGEST offset, ULONGEST len);
} osdata_table[] = {
{ "processes", "Processes", "Listing of all processes",
linux_xfer_osdata_processes },
{ "procgroups", "Process groups", "Listing of all process groups",
linux_xfer_osdata_processgroups },
{ "threads", "Threads", "Listing of all threads",
linux_xfer_osdata_threads },
{ "files", "File descriptors", "Listing of all file descriptors",
linux_xfer_osdata_fds },
{ "sockets", "Sockets", "Listing of all internet-domain sockets",
linux_xfer_osdata_isockets },
{ "shm", "Shared-memory regions", "Listing of all shared-memory regions",
linux_xfer_osdata_shm },
{ "semaphores", "Semaphores", "Listing of all semaphores",
linux_xfer_osdata_sem },
{ "msg", "Message queues", "Listing of all message queues",
linux_xfer_osdata_msg },
{ "modules", "Kernel modules", "Listing of all loaded kernel modules",
linux_xfer_osdata_modules },
{ NULL, NULL, NULL }
};
LONGEST
linux_common_xfer_osdata (const char *annex, gdb_byte *readbuf,
ULONGEST offset, ULONGEST len)
{
if (!annex || *annex == '\0')
{
static const char *buf;
static LONGEST len_avail = -1;
static struct buffer buffer;
if (offset == 0)
{
int i;
if (len_avail != -1 && len_avail != 0)
buffer_free (&buffer);
len_avail = 0;
buf = NULL;
buffer_init (&buffer);
buffer_grow_str (&buffer, "<osdata type=\"types\">\n");
for (i = 0; osdata_table[i].type; ++i)
buffer_xml_printf (
&buffer,
"<item>"
"<column name=\"Type\">%s</column>"
"<column name=\"Description\">%s</column>"
"<column name=\"Title\">%s</column>"
"</item>",
osdata_table[i].type,
osdata_table[i].description,
osdata_table[i].title);
buffer_grow_str0 (&buffer, "</osdata>\n");
buf = buffer_finish (&buffer);
len_avail = strlen (buf);
}
if (offset >= len_avail)
{
/* Done. Get rid of the buffer. */
buffer_free (&buffer);
buf = NULL;
len_avail = 0;
return 0;
}
if (len > len_avail - offset)
len = len_avail - offset;
memcpy (readbuf, buf + offset, len);
return len;
}
else
{
int i;
for (i = 0; osdata_table[i].type; ++i)
{
if (strcmp (annex, osdata_table[i].type) == 0)
{
gdb_assert (readbuf);
return (osdata_table[i].getter) (readbuf, offset, len);
}
}
return 0;
}
}
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