1 /* pmap.c - Reports the memory map of a process or processes.
2 *
3 * Copyright 2013 Ranjan Kumar <[email protected]>
4 * Copyright 2013 Kyungwan Han <[email protected]>
5 *
6 * No Standard.
7 *
8 * TODO: two passes so we can auto-size the columns?
9
10 USE_PMAP(NEWTOY(pmap, "<1pqx", TOYFLAG_USR|TOYFLAG_BIN))
11
12 config PMAP
13 bool "pmap"
14 default y
15 help
16 usage: pmap [-pqx] PID...
17
18 Report the memory map of a process or processes.
19
20 -p Show full paths
21 -q Do not show header or footer
22 -x Show the extended format
23 */
24
25 #define FOR_pmap
26 #include "toys.h"
27
pmap_main(void)28 void pmap_main(void)
29 {
30 char **optargs, *line = 0;
31 size_t len = 0;
32
33 for (optargs = toys.optargs; *optargs; optargs++) {
34 long long start, end, pss, tpss=0, dirty, tdirty=0, swap, tswap=0, total=0;
35 char *name = 0, *k = "K"+FLAG(x), mode[5];
36 pid_t pid = atolx(*optargs);
37 int extras = 0, off, count;
38 FILE *fp;
39
40 sprintf(toybuf, "/proc/%u/cmdline", pid);
41 if (!(name = readfile(toybuf, 0, 0))) {
42 error_msg("no %s", toybuf);
43 continue;
44 }
45 xprintf("%d: %s\n", pid, name);
46 free(name);
47
48 // Only bother scanning the more verbose smaps file in -x mode.
49 sprintf(toybuf, "/proc/%u/%smaps", pid, "s"+!FLAG(x));
50 if (!(fp = fopen(toybuf, "r"))) {
51 error_msg("no %s", toybuf);
52 continue;
53 }
54
55 if (FLAG(x) && !FLAG(q))
56 xprintf("Address%*cKbytes PSS Dirty Swap Mode Mapping\n",
57 (int)(sizeof(long)*2)-5, ' ');
58
59 while (getline(&line, &len, fp) > 0) {
60 count = sscanf(line, "%llx-%llx %4s %*s %*s %*s %n", &start, &end, mode,
61 &off);
62 if (count == 3) {
63 name = line[off] ? line+off : " [anon]\n";
64 if (mode[3] == 'p') mode[3] = '-';
65 total += end = (end-start)/1024;
66 printf("%0*llx % *lld%s ", (int)(2*sizeof(long)), start, 6+FLAG(x),
67 end, k);
68 if (FLAG(x)) {
69 strcpy(toybuf, name);
70 name = toybuf;
71 continue;
72 }
73 } else {
74 if (sscanf(line, "Pss: %lld", &pss) ||
75 sscanf(line, "Private_Dirty: %lld", &dirty) ||
76 sscanf(line, "Swap: %lld", &swap)) extras++;
77 if (extras==3) {
78 printf("% 7lld %7lld %7lld ", pss, dirty, swap);
79 tpss += pss;
80 tdirty += dirty;
81 tswap += swap;
82 extras = 0;
83 } else continue;
84 }
85
86 xprintf("%s- %s%s", mode, *name == '[' ? " " : "",
87 FLAG(p) ? name : basename(name));
88 }
89
90 if (!FLAG(q)) {
91 if (FLAG(x)) {
92 xprintf("---------------- ------ ------ ------ ------\n" +
93 ((sizeof(long)==4)?8:0));
94 }
95 printf("total% *lld%s", 2*(int)(sizeof(long)+1)+FLAG(x), total, k);
96 if (FLAG(x)) printf("% 8lld% 8lld% 8lld", tpss, tdirty, tswap);
97 xputc('\n');
98 }
99
100 fclose(fp);
101 }
102 free(line);
103 }
104