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annotate toys/other/pmap.c @ 1736:5892daac85ab draft

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author Rob Landley <rob@landley.net>
date Thu, 12 Mar 2015 15:34:03 -0500
parents 3ac823675413
children
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1 /* pmap.c - Reports the memory map of a process or processes.
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2 *
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3 * Copyright 2013 Ranjan Kumar <ranjankumar.bth@gmail.com>
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4 * Copyright 2013 Kyungwan Han <asura321@gmail.com>
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5 *
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6 * No Standard.
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7
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8 USE_PMAP(NEWTOY(pmap, "<1xq", TOYFLAG_BIN))
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9
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10 config PMAP
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11 bool "pmap"
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12 default y
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13 help
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14 usage: pmap [-xq] [pids...]
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15
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16 Reports the memory map of a process or processes.
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17
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18 -x Show the extended format.
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19 -q Do not display some header/footer lines.
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20 */
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21
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22 #define FOR_pmap
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23 #include "toys.h"
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24
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25 void pmap_main(void)
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26 {
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27 char **optargs;
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28
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29 for (optargs = toys.optargs; *optargs; optargs++) {
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30 pid_t pid = atolx(*optargs);
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31 FILE *fp;
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32 char *line, *oldline = 0, *name = 0,
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33 *k = (toys.optflags & FLAG_x) ? "" : "K";
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34 size_t len;
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35 long long start, end, pss, tpss = 0, dirty, tdirty = 0, swap, tswap = 0,
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36 total = 0;
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37 int xx = 0;
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38
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39 snprintf(toybuf, sizeof(toybuf), "/proc/%u/cmdline", pid);
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40 line = readfile(toybuf, 0, 0);
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41 if (!line) error_msg("No %lu", (long)pid);
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42 xprintf("%u: %s\n", (int)pid, line);
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43 free(line);
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44
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45 // Header
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46 // Only use the more verbose file in -x mode
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47 sprintf(toybuf, "/proc/%u/%smaps", pid,
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48 (toys.optflags & FLAG_x) ? "s" : "");
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49 if (!(fp = fopen(toybuf, "r"))) {
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50 error_msg("No %ld\n", (long)pid);
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51 return;
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52 }
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53
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54 if ((toys.optflags & (FLAG_q|FLAG_x)) == FLAG_x)
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55 xprintf("Address%*cKbytes PSS Dirty Swap Mode Mapping\n",
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56 (int)(sizeof(long)*2)-4, ' ');
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57
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58 // Loop through mappings
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59 for (;;) {
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60 int off, count;
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61
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62 line = 0;
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63 if (0 >= getline(&line, &len, fp)) break;
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64 count = sscanf(line, "%llx-%llx %s %*s %*s %*s %n",
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65 &start, &end, toybuf, &off);
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66
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67 if (count == 3) {
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68 name = line[off] ? line+off : " [anon]\n";
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69 if (toybuf[3] == 'p') toybuf[3] = '-';
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70 total += end = (end-start)/1024;
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71 printf("%0*llx % *lld%s ", (int)(2*sizeof(long)), start,
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72 6+!!(toys.optflags & FLAG_x), end, k);
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73 if (toys.optflags & FLAG_x) {
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74 oldline = line;
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75 continue;
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76 }
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77 } else {
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78 if (0<sscanf(line, "Pss: %lld", &pss)
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79 || 0<sscanf(line, "Private_Dirty: %lld", &dirty)
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80 || 0<sscanf(line, "Swap: %lld", &swap)) xx++;
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81 free(line);
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82 if (xx<3) continue;
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83 line = oldline;
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84 name = basename(name);
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85 xx = 0;
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86 printf("% 7lld %7lld %7lld ", pss, dirty, swap);
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87 tpss += pss;
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88 tdirty += dirty;
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89 tswap += swap;
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90 }
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91
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92 xprintf("%s- %s%s", toybuf, line[off]=='[' ? " " : "", name);
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93
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94 free(line);
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95 line = 0;
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96 }
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97
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98 // Trailer
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99 if (!(toys.optflags & FLAG_q)) {
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100 int x = !!(toys.optflags & FLAG_x);
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101 if (x) {
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102 memset(toybuf, '-', 16);
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103 xprintf("%.*s ------ ------ ------ ------\n", (int)(sizeof(long)*2),
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104 toybuf);
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105 }
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106 printf("total% *lld%s", 2*(int)(sizeof(long)+1)+x, total, k);
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107 if (x) printf("% 8lld% 8lld% 8lld", tpss, tdirty, tswap);
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108 xputc('\n');
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109 }
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110
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111 fclose(fp);
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112 }
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113 }