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/* pmap.c - Reports the memory map of a process or processes.
*
* Copyright 2013 Ranjan Kumar <ranjankumar.bth@gmail.com>
* Copyright 2013 Kyungwan Han <asura321@gmail.com>
*
* No Standard.
USE_PMAP(NEWTOY(pmap, "<1xq", TOYFLAG_USR|TOYFLAG_BIN))
config PMAP
bool "pmap"
default y
help
usage: pmap [-xq] [pids...]
Report the memory map of a process or processes.
-x Show the extended format
-q Do not display some header/footer lines
*/
#define FOR_pmap
#include "toys.h"
void pmap_main(void)
{
char **optargs;
for (optargs = toys.optargs; *optargs; optargs++) {
pid_t pid = atolx(*optargs);
FILE *fp;
char *line, *oldline = 0, *name = 0,
*k = (toys.optflags & FLAG_x) ? "" : "K";
size_t len;
long long start, end, pss, tpss = 0, dirty, tdirty = 0, swap, tswap = 0,
total = 0;
int xx = 0;
snprintf(toybuf, sizeof(toybuf), "/proc/%u/cmdline", pid);
line = readfile(toybuf, 0, 0);
if (!line) error_msg("No %lu", (long)pid);
xprintf("%u: %s\n", (int)pid, line);
free(line);
// Header
// Only use the more verbose file in -x mode
sprintf(toybuf, "/proc/%u/%smaps", pid,
(toys.optflags & FLAG_x) ? "s" : "");
if (!(fp = fopen(toybuf, "r"))) {
error_msg("No %ld\n", (long)pid);
return;
}
if ((toys.optflags & (FLAG_q|FLAG_x)) == FLAG_x)
xprintf("Address%*cKbytes PSS Dirty Swap Mode Mapping\n",
(int)(sizeof(long)*2)-4, ' ');
// Loop through mappings
for (;;) {
int off, count;
line = 0;
if (0 >= getline(&line, &len, fp)) break;
count = sscanf(line, "%llx-%llx %s %*s %*s %*s %n",
&start, &end, toybuf, &off);
if (count == 3) {
name = line[off] ? line+off : " [anon]\n";
if (toybuf[3] == 'p') toybuf[3] = '-';
total += end = (end-start)/1024;
printf("%0*llx % *lld%s ", (int)(2*sizeof(long)), start,
6+!!(toys.optflags & FLAG_x), end, k);
if (toys.optflags & FLAG_x) {
oldline = line;
continue;
}
} else {
if (0<sscanf(line, "Pss: %lld", &pss)
|| 0<sscanf(line, "Private_Dirty: %lld", &dirty)
|| 0<sscanf(line, "Swap: %lld", &swap)) xx++;
free(line);
if (xx<3) continue;
line = oldline;
name = basename(name);
xx = 0;
printf("% 7lld %7lld %7lld ", pss, dirty, swap);
tpss += pss;
tdirty += dirty;
tswap += swap;
}
xprintf("%s- %s%s", toybuf, line[off]=='[' ? " " : "", name);
free(line);
line = 0;
}
// Trailer
if (!(toys.optflags & FLAG_q)) {
int x = !!(toys.optflags & FLAG_x);
if (x) {
memset(toybuf, '-', 16);
xprintf("%.*s ------ ------ ------ ------\n", (int)(sizeof(long)*2),
toybuf);
}
printf("total% *lld%s", 2*(int)(sizeof(long)+1)+x, total, k);
if (x) printf("% 8lld% 8lld% 8lld", tpss, tdirty, tswap);
xputc('\n');
}
fclose(fp);
}
}
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