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procps/pmap.c
Craig Small dca3c6d08f pmap vmflags support 
Some new kernel version added a line in /proc/pid/smaps listing a processes vmflags. This broke pmap such that pmap -X and pmap -XX would always fail.

This patch adds support for the vmflags field so that -X and -XX work again AND they display the flags.

Merge commit 'refs/merge-requests/8' of git://gitorious.org/procps/procps into merge-requests/8
2013-01-24 22:39:42 +11:00

730 lines
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/*
* pmap.c - print process memory mapping
* Copyright 2002 Albert Cahalan
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <assert.h>
#include "c.h"
#include "fileutils.h"
#include "nls.h"
#include "proc/escape.h"
#include "xalloc.h"
#include "proc/readproc.h"
#include "proc/version.h"
static void __attribute__ ((__noreturn__))
usage(FILE * out)
{
fputs(USAGE_HEADER, out);
fprintf(out,
_(" %s [options] pid [pid ...]\n"), program_invocation_short_name);
fputs(USAGE_OPTIONS, out);
fputs(_(" -x, --extended show details\n"
" -X show even more details\n"
" WARNING: format changes according to /proc/PID/smaps\n"
" -XX show everything the kernel provides\n"
" -d, --device show the device format\n"
" -q, --quiet do not display header and footer\n"
" -A, --range=<low>[,<high>] limit results to the given range\n"), out);
fputs(USAGE_SEPARATOR, out);
fputs(USAGE_HELP, out);
fputs(USAGE_VERSION, out);
fprintf(out, USAGE_MAN_TAIL("pmap(1)"));
exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
}
static char mapbuf[1024];
static char cmdbuf[512];
static unsigned KLONG range_low;
static unsigned KLONG range_high = ~0ull;
static int d_option;
static int q_option;
static int x_option;
static int X_option;
static unsigned shm_minor = ~0u;
static void discover_shm_minor(void)
{
void *addr;
int shmid;
char mapbuf_b[256];
if (!freopen("/proc/self/maps", "r", stdin))
return;
/* create */
shmid = shmget(IPC_PRIVATE, 42, IPC_CREAT | 0666);
if (shmid == -1)
/* failed; oh well */
return;
/* attach */
addr = shmat(shmid, NULL, SHM_RDONLY);
if (addr == (void *)-1)
goto out_destroy;
while (fgets(mapbuf_b, sizeof mapbuf_b, stdin)) {
char flags[32];
/* to clean up unprintables */
char *tmp;
unsigned KLONG start, end;
unsigned long long file_offset, inode;
unsigned dev_major, dev_minor;
sscanf(mapbuf_b, "%" KLF "x-%" KLF "x %31s %llx %x:%x %llu", &start,
&end, flags, &file_offset, &dev_major, &dev_minor,
&inode);
tmp = strchr(mapbuf_b, '\n');
if (tmp)
*tmp = '\0';
tmp = mapbuf_b;
while (*tmp) {
if (!isprint(*tmp))
*tmp = '?';
tmp++;
}
if (start > (unsigned long)addr)
continue;
if (dev_major)
continue;
if (flags[3] != 's')
continue;
if (strstr(mapbuf_b, "/SYSV")) {
shm_minor = dev_minor;
break;
}
}
if (shmdt(addr))
perror(_("shared memory detach"));
out_destroy:
if (shmctl(shmid, IPC_RMID, NULL))
perror(_("shared memory remove"));
return;
}
static char *mapping_name(proc_t * p, unsigned KLONG addr,
unsigned KLONG len, const char *mapbuf_b,
unsigned showpath, unsigned dev_major,
unsigned dev_minor, unsigned long long inode)
{
char *cp;
if (!dev_major && dev_minor == shm_minor && strstr(mapbuf_b, "/SYSV")) {
static char shmbuf[64];
snprintf(shmbuf, sizeof shmbuf, " [ shmid=0x%llx ]", inode);
return shmbuf;
}
cp = strrchr(mapbuf_b, '/');
if (cp) {
if (showpath)
return strchr(mapbuf_b, '/');
return cp[1] ? cp + 1 : cp;
}
cp = strchr(mapbuf_b, '/');
if (cp) {
if (showpath)
return cp;
/* it WILL succeed */
return strrchr(cp, '/') + 1;
}
cp = _(" [ anon ]");
if ((p->start_stack >= addr) && (p->start_stack <= addr + len))
cp = _(" [ stack ]");
return cp;
}
#define DETAIL_LENGTH 32
#define DETL "31" /* for format strings */
#define NUM_LENGTH 21 /* python says: len(str(2**64)) == 20 */
#define NUML "20" /* for format strings */
#define VMFLAGS_LENGTH 81 /* There are 27 posible 2 character vmflags
as of this patch */
struct listnode {
char description[DETAIL_LENGTH];
char value_str[NUM_LENGTH];
unsigned KLONG value;
unsigned KLONG total;
int max_width;
struct listnode *next;
};
static struct listnode *listhead=NULL, *listtail=NULL;
static int is_unimportant (char *s)
{
if (strcmp(s, "AnonHugePages") == 0) return 1;
if (strcmp(s, "KernelPageSize") == 0) return 1;
if (strcmp(s, "MMUPageSize") == 0) return 1;
if (strcmp(s, "Shared_Dirty") == 0) return 1;
if (strcmp(s, "Private_Dirty") == 0) return 1;
if (strcmp(s, "Shared_Clean") == 0) return 1;
if (strcmp(s, "Private_Clean") == 0) return 1;
return 0;
}
static void print_extended_maps (FILE *f)
{
struct listnode *listnode;
char flags[DETAIL_LENGTH], map_desc[128],
detail_desc[DETAIL_LENGTH], value_str[NUM_LENGTH],
start[NUM_LENGTH], end[NUM_LENGTH],
offset[NUM_LENGTH], inode[NUM_LENGTH],
dev[64], fmt_str[64],
vmflags[VMFLAGS_LENGTH];
int maxw1=0, maxw2=0, maxw3=0, maxw4=0, maxw5=0, maxwv=0;
int nfields, firstmapping, footer_gap, i;
unsigned KLONG value;
char *ret;
char c;
char has_vmflags = 0;
ret = fgets(mapbuf, sizeof mapbuf, f);
firstmapping = 1;
while (ret != NULL) {
/* === READ MAPPING === */
map_desc[0] = '\0';
nfields = sscanf(mapbuf,
"%"NUML"[0-9a-f]-%"NUML"[0-9a-f] "
"%"DETL"s %"NUML"[0-9a-f] "
"%63[0-9a-f:] %"NUML"s %127[^\n]%c",
start, end, flags, offset,
dev, inode, map_desc, &c);
/* Must read at least up to inode, else something has changed! */
if (nfields < 6)
xerrx(EXIT_FAILURE, _("Unknown format in smaps file!"));
/* If line too long we dump everything else. */
while (c != '\n') {
ret = fgets(mapbuf, sizeof mapbuf, f);
c = mapbuf[strlen(mapbuf) - 1];
}
/* Store maximum widths for printing nice later */
if (strlen(start) > maxw1) maxw1 = strlen(start);
if (strlen(flags) > maxw2) maxw2 = strlen(flags);
if (strlen(offset) > maxw3) maxw3 = strlen(offset);
if (strlen(dev) > maxw4) maxw4 = strlen(dev);
if (strlen(inode) > maxw5) maxw5 = strlen(inode);
if (7 > maxw5) maxw5 = 7;
ret = fgets(mapbuf, sizeof mapbuf, f);
nfields = sscanf(mapbuf, "%"DETL"[^:]: %"NUML"[0-9] kB %c",
detail_desc, value_str, &c);
listnode = listhead;
/* === READ MAPPING DETAILS === */
while (ret != NULL && nfields == 2) {
if (X_option < 2 && is_unimportant(detail_desc))
goto loop_end;
/* === CREATE LIST AND FILL description FIELD === */
if (listnode == NULL) {
assert(firstmapping == 1);
listnode = calloc(1, sizeof *listnode);
if (listhead == NULL) {
assert(listtail == NULL);
listhead = listnode;
} else {
listtail->next = listnode;
}
listtail = listnode;
/* listnode was calloc()ed so all fields are already NULL! */
strcpy(listnode->description, detail_desc);
if (strlen(detail_desc) > 7)
listnode->max_width = strlen(detail_desc);
else
listnode->max_width = 7;
} else {
/* === LIST EXISTS === */
if ((listnode == NULL) ||
(strcmp(listnode->description, detail_desc) != 0))
xerrx(EXIT_FAILURE, "ERROR: %s %s",
_("inconsistent detail field in smaps file, line:\n"),
mapbuf);
}
strcpy(listnode->value_str, value_str);
sscanf(value_str, "%"KLF"u", &listnode->value);
listnode->total += listnode->value;
if (strlen(value_str) > listnode->max_width)
listnode->max_width = strlen(value_str);
listnode = listnode->next;
loop_end:
ret = fgets(mapbuf, sizeof mapbuf, f);
nfields = sscanf(mapbuf, "%"DETL"[^:]: %"NUML"[0-9] kB %c",
detail_desc, value_str, &c);
}
/* === GET VMFLAGS === */
nfields = sscanf(mapbuf, "VmFlags: %[a-z ]", vmflags);
if (nfields == 1) {
if (! has_vmflags) has_vmflags = 1;
ret = fgets(mapbuf, sizeof mapbuf, f);
if (strlen(vmflags) > maxwv) maxwv = strlen(vmflags);
}
/* === PRINT THIS MAPPING === */
/* Print header */
if (firstmapping && !q_option) {
if (strlen("Address") > maxw1) maxw1 = strlen("Address");
if (strlen("Flags") > maxw2) maxw2 = strlen("Flags");
if (strlen("Offset") > maxw3) maxw3 = strlen("Offset");
if (strlen("Device") > maxw4) maxw4 = strlen("Device");
if (strlen("Inode") > maxw5) maxw5 = strlen("Inode");
if (has_vmflags && strlen("VmFlags") > maxwv) maxwv = strlen("VmFlags");
sprintf(fmt_str, "%%%ds %%%ds %%%ds %%%ds %%%ds",
maxw1, maxw2, maxw3, maxw4, maxw5);
printf(fmt_str, "Address", "Flags", "Offset", "Device", "Inode");
for (listnode=listhead; listnode=listnode->next;
listnode!=NULL) {
sprintf(fmt_str, " %%%ds", listnode->max_width);
printf(fmt_str, listnode->description);
}
if (has_vmflags) {
sprintf(fmt_str, " %%%ds", maxwv);
printf(fmt_str, "VmFlags");
}
printf(" %s\n", "Description");
}
/* Print data */
sprintf(fmt_str, "%%%ds %%%ds %%%ds %%%ds %%%ds",
maxw1, maxw2, maxw3, maxw4, maxw5);
printf(fmt_str, start, flags, offset, dev, inode);
for (listnode=listhead; listnode=listnode->next;
listnode!=NULL) {
sprintf(fmt_str, " %%%ds", listnode->max_width);
printf(fmt_str, listnode->value_str);
}
if (has_vmflags) {
sprintf(fmt_str, " %%%ds", maxwv);
printf(fmt_str, vmflags);
}
printf(" %s\n", map_desc);
firstmapping = 0;
}
/* === PRINT TOTALS === */
if (!q_option && listhead!=NULL) {
footer_gap = maxw1+maxw2+maxw3+maxw4+maxw5+5;
for (i=0; i<footer_gap; i++)
putc(' ', stdout);
for (listnode=listhead; listnode=listnode->next;
listnode!=NULL) {
for (i=0; i<listnode->max_width; i++)
putc('=', stdout);
putc(' ', stdout);
}
putc('\n', stdout);
for (i=0; i<footer_gap; i++)
putc(' ', stdout);
for (listnode=listhead; listnode=listnode->next;
listnode!=NULL) {
sprintf(fmt_str, "%%%dd ", listnode->max_width);
printf(fmt_str, listnode->total);
}
fputs("KB \n", stdout);
}
/* We don't free() the list, it's used for all PIDs passed as arguments */
}
static int one_proc(proc_t * p)
{
char buf[32];
FILE *fp;
unsigned long total_shared = 0ul;
unsigned long total_private_readonly = 0ul;
unsigned long total_private_writeable = 0ul;
KLONG diff = 0;
const char *cp2 = NULL;
unsigned long long rss = 0ull;
unsigned long long private_dirty = 0ull;
unsigned long long shared_dirty = 0ull;
unsigned long long total_rss = 0ull;
unsigned long long total_private_dirty = 0ull;
unsigned long long total_shared_dirty = 0ull;
/* Overkill, but who knows what is proper? The "w" prog uses
* the tty width to determine this.
*/
int maxcmd = 0xfffff;
if (x_option || X_option) {
sprintf(buf, "/proc/%u/smaps", p->tgid);
if ((fp = fopen(buf, "r")) == NULL)
return 1;
} else {
sprintf(buf, "/proc/%u/maps", p->tgid);
if ((fp = fopen(buf, "r")) == NULL)
return 1;
}
escape_command(cmdbuf, p, sizeof cmdbuf, &maxcmd,
ESC_ARGS | ESC_BRACKETS);
printf("%u: %s\n", p->tgid, cmdbuf);
if (X_option) {
print_extended_maps(fp);
return 0;
}
if (!q_option && (x_option | d_option)) {
if (x_option) {
if (sizeof(KLONG) == 4)
/* Translation Hint: Please keep
* alignment of the following four
* headers intact. */
printf
(_("Address Kbytes RSS Dirty Mode Mapping\n"));
else
printf
(_("Address Kbytes RSS Dirty Mode Mapping\n"));
}
if (d_option) {
if (sizeof(KLONG) == 4)
printf
(_("Address Kbytes Mode Offset Device Mapping\n"));
else
printf
(_("Address Kbytes Mode Offset Device Mapping\n"));
}
}
while (fgets(mapbuf, sizeof mapbuf, fp)) {
char flags[32];
/* to clean up unprintables */
char *tmp;
unsigned KLONG start, end;
unsigned long long file_offset, inode;
unsigned dev_major, dev_minor;
unsigned long long smap_value;
char smap_key[20];
/* hex values are lower case or numeric, keys are upper */
if (mapbuf[0] >= 'A' && mapbuf[0] <= 'Z') {
/* Its a key */
if (sscanf
(mapbuf, "%20[^:]: %llu", smap_key,
&smap_value) == 2) {
if (strncmp("Rss", smap_key, 3) == 0) {
rss = smap_value;
total_rss += smap_value;
continue;
}
if (strncmp("Shared_Dirty", smap_key, 12) == 0) {
shared_dirty = smap_value;
total_shared_dirty += smap_value;
continue;
}
if (strncmp("Private_Dirty", smap_key, 13) == 0) {
private_dirty = smap_value;
total_private_dirty += smap_value;
continue;
}
if (strncmp("Swap", smap_key, 4) == 0) {
/*doesnt matter as long as last */
printf((sizeof(KLONG) == 8)
? "%016" KLF
"x %7lu %7llu %7llu %s %s\n" :
"%08lx %7lu %7llu %7llu %s %s\n",
start,
(unsigned long)(diff >> 10), rss,
(private_dirty + shared_dirty),
flags, cp2);
/* reset some counters */
rss = shared_dirty = private_dirty =
0ull;
diff = 0;
continue;
}
/* Other keys */
continue;
}
}
sscanf(mapbuf, "%" KLF "x-%" KLF "x %31s %llx %x:%x %llu", &start,
&end, flags, &file_offset, &dev_major, &dev_minor,
&inode);
if (end - 1 < range_low)
continue;
if (range_high < start)
break;
tmp = strchr(mapbuf, '\n');
if (tmp)
*tmp = '\0';
tmp = mapbuf;
while (*tmp) {
if (!isprint(*tmp))
*tmp = '?';
tmp++;
}
diff = end - start;
if (flags[3] == 's')
total_shared += diff;
if (flags[3] == 'p') {
flags[3] = '-';
if (flags[1] == 'w')
total_private_writeable += diff;
else
total_private_readonly += diff;
}
/* format used by Solaris 9 and procps-3.2.0+ an 'R'
* if swap not reserved (MAP_NORESERVE, SysV ISM
* shared mem, etc.)
*/
flags[4] = '-';
flags[5] = '\0';
if (x_option) {
cp2 =
mapping_name(p, start, diff, mapbuf, 0, dev_major,
dev_minor, inode);
/* printed with the keys */
continue;
}
if (d_option) {
const char *cp =
mapping_name(p, start, diff, mapbuf, 0, dev_major,
dev_minor, inode);
printf((sizeof(KLONG) == 8)
? "%016" KLF "x %7lu %s %016llx %03x:%05x %s\n"
: "%08lx %7lu %s %016llx %03x:%05x %s\n",
start,
(unsigned long)(diff >> 10),
flags, file_offset, dev_major, dev_minor, cp);
}
if (!x_option && !d_option) {
const char *cp =
mapping_name(p, start, diff, mapbuf, 1, dev_major,
dev_minor, inode);
printf((sizeof(KLONG) == 8)
? "%016" KLF "x %6luK %s %s\n"
: "%08lx %6luK %s %s\n",
start, (unsigned long)(diff >> 10), flags, cp);
}
}
fclose(fp);
if (!q_option) {
if (x_option) {
if (sizeof(KLONG) == 8) {
printf
("---------------- ------ ------ ------\n");
printf(_("total kB %15ld %7llu %7llu\n"),
(total_shared + total_private_writeable +
total_private_readonly) >> 10,
total_rss,
(total_shared_dirty +
total_private_dirty)
);
} else {
printf
("-------- ------- ------- ------- -------\n");
printf
(_("total kB %7ld %7llu %7llu -\n"),
(total_shared + total_private_writeable +
total_private_readonly) >> 10,
total_rss, (total_shared_dirty+total_private_dirty));
}
}
if (d_option) {
printf
(_("mapped: %ldK writeable/private: %ldK shared: %ldK\n"),
(total_shared + total_private_writeable +
total_private_readonly) >> 10,
total_private_writeable >> 10, total_shared >> 10);
}
if (!x_option && !d_option) {
if (sizeof(KLONG) == 8)
/* Translation Hint: keep total string length
* as 24 characters. Adjust %16 if needed*/
printf(_(" total %16ldK\n"),
(total_shared + total_private_writeable +
total_private_readonly) >> 10);
else
/* Translation Hint: keep total string length
* as 16 characters. Adjust %8 if needed*/
printf(_(" total %8ldK\n"),
(total_shared + total_private_writeable +
total_private_readonly) >> 10);
}
}
return 0;
}
static void range_arguments(char *optarg)
{
char *arg1;
char *arg2;
arg1 = xstrdup(optarg);
arg2 = strchr(arg1, ',');
if (arg2)
*arg2 = '\0';
if (arg2)
++arg2;
else
arg2 = arg1;
if (arg1 && *arg1)
range_low = STRTOUKL(arg1, &arg1, 16);
if (*arg2)
range_high = STRTOUKL(arg2, &arg2, 16);
if (arg1 && (*arg1 || *arg2))
xerrx(EXIT_FAILURE, "%s: '%s'", _("failed to parse argument"),
optarg);
}
int main(int argc, char **argv)
{
unsigned long *pidlist;
unsigned count = 0;
PROCTAB *PT;
proc_t p;
int ret = 0, c;
static const struct option longopts[] = {
{"extended", no_argument, NULL, 'x'},
{"device", no_argument, NULL, 'd'},
{"quiet", no_argument, NULL, 'q'},
{"range", required_argument, NULL, 'A'},
{"help", no_argument, NULL, 'h'},
{"version", no_argument, NULL, 'V'},
{NULL, 0, NULL, 0}
};
program_invocation_name = program_invocation_short_name;
setlocale (LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
atexit(close_stdout);
x_option = d_option = q_option = 0;
while ((c = getopt_long(argc, argv, "xXrdqA:hV", longopts, NULL)) != -1)
switch (c) {
case 'x':
x_option = 1;
break;
case 'X':
X_option++;
break;
case 'r':
xwarnx(_("option -r is ignored as SunOS compatibility"));
break;
case 'd':
d_option = 1;
break;
case 'q':
q_option = 1;
break;
case 'A':
range_arguments(optarg);
break;
case 'h':
usage(stdout);
case 'V':
printf(PROCPS_NG_VERSION);
return EXIT_SUCCESS;
case 'a': /* Sun prints anon/swap reservations */
case 'F': /* Sun forces hostile ptrace-like grab */
case 'l': /* Sun shows unresolved dynamic names */
case 'L': /* Sun shows lgroup info */
case 's': /* Sun shows page sizes */
case 'S': /* Sun shows swap reservations */
default:
usage(stderr);
}
argc -= optind;
argv += optind;
if (argc < 1)
xerrx(EXIT_FAILURE, _("argument missing"));
if (d_option && (x_option || X_option) ||
x_option && (d_option || X_option))
xerrx(EXIT_FAILURE, _("options -d, -x, -X are mutually exclusive"));
pidlist = xmalloc(sizeof(unsigned long) * argc);
while (*argv) {
char *walk = *argv++;
char *endp;
unsigned long pid;
if (!strncmp("/proc/", walk, 6)) {
walk += 6;
/* user allowed to do: pmap /proc/PID */
if (*walk < '0' || *walk > '9')
continue;
}
if (*walk < '0' || *walk > '9')
usage(stderr);
pid = strtoul(walk, &endp, 0);
if (pid < 1ul || pid > 0x7ffffffful || *endp)
usage(stderr);
pidlist[count++] = pid;
}
discover_shm_minor();
memset(&p, '\0', sizeof(p));
/* old libproc interface is zero-terminated */
pidlist[count] = 0;
PT = openproc(PROC_FILLSTAT | PROC_FILLARG | PROC_PID, pidlist);
while (readproc(PT, &p)) {
ret |= one_proc(&p);
count--;
}
closeproc(PT);
free(pidlist);
if (count)
/* didn't find all processes asked for */
ret |= 42;
return ret;
}
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