git.itanic.dy.fi Git - scan-pagemap/blob - main.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <errno.h>
   5 #include <getopt.h>
   6 #include <unistd.h>
   7 #include <sys/types.h>
   8
   9 #include "parse.h"
  10 #include "analyze.h"
  11 #include "pidlib.h"
  12
  13 void print_help_and_die(char *name)
  14 {
  15         printf("Usage: %s options\n"
  16                 "-p, --pid=PID          scan maps belonging to a given pid\n"
  17                 "-P, --process=PROCESS  scan maps belonging to processes with "
  18                 "given name\n"
  19                 "-m, --map=mapname      scan maps with given mapping name\n"
  20                 "-d, --dump             dump process maps\n"
  21                 "-s, --shared-mappings  dump only shared mappings\n"
  22                 "-h, --help             show this help\n",
  23                 name);
  24
  25         exit(0);
  26 }
  27
  28 #define OPT_WITH_THREADS        0x101
  29
  30 static void get_all_pids_by_name(struct parse_opts *opts, char *name)
  31 {
  32         struct pidlist *pidlist;
  33         DIR *dir = NULL;
  34         int pid;
  35
  36         while ((pid = get_next_pid_by_name(&dir, name))) {
  37                 pidlist = alloc_pidlist();
  38                 if (pidlist == NULL)
  39                         return;
  40                 pidlist->pid = pid;
  41                 list_add_tail(&pidlist->list, &opts->pidlist);
  42         }
  43 }
  44
  45 static int add_pid_to_pidlist(int pidi, struct list_head *pidlist)
  46 {
  47         struct pidlist *pid = alloc_pidlist();
  48
  49         if (pid == NULL) {
  50                 perror("malloc");
  51                 return -1;
  52         }
  53         pid->pid = pidi;
  54
  55         list_add_tail(&pid->list, pidlist);
  56
  57         return 0;
  58 }
  59
  60 void read_args(int argc, char *argv[], struct parse_opts *opts)
  61 {
  62         int option_index = 0, c;
  63         static struct option long_options[] = {
  64                 { .val = 'p', .name = "pid", .has_arg = 1, },
  65                 { .val = 'P', .name = "process", .has_arg = 1, },
  66                 { .val = 'm', .name = "map", .has_arg = 1, },
  67                 { .val = OPT_WITH_THREADS, .name = "with-threads" },
  68                 { .val = 'd', .name = "dump", },
  69                 { .val = 's', .name = "shared-mappings", },
  70                 { .val = 'h', .name = "help", },
  71         };
  72         char short_options[] = "p:P:m:sdh";
  73         opts->parse_mask = 0;
  74
  75         while (1) {
  76                 c = getopt_long(argc, argv, short_options, long_options,
  77                                 &option_index);
  78
  79                 if (c == -1)
  80                         break;
  81
  82                 switch (c) {
  83                 case 'p':
  84                 {
  85                         int pid = pidstr_is_ok(optarg);
  86                         if (!pid) {
  87                                 fprintf(stderr, "Invalid pid number %s\n",
  88                                         optarg);
  89                                 break;
  90                         }
  91
  92                         opts->parse_mask |= PARSE_PID;
  93                         add_pid_to_pidlist(pid, &opts->pidlist);
  94                         break;
  95                 }
  96                 case 'P':
  97                         get_all_pids_by_name(opts, optarg);
  98                         opts->parse_mask |= PARSE_PID;
  99                         break;
 100                 case 'm':
 101                         opts->parse_mask |= PARSE_MAP_NAME;
 102                         opts->name = optarg;
 103                         break;
 104                 case OPT_WITH_THREADS:
 105                         opts->with_threads = 1;
 106                         break;
 107                 case 's':
 108                         opts->parse_mask |= PARSE_SHARED_MAPPING;
 109                         /* implies --dump */
 110                 case 'd':
 111                         opts->parse_mask |= PARSE_DUMP;
 112                         break;
 113                 case 'h':
 114                         print_help_and_die(argv[0]);
 115                         break;
 116                 }
 117         }
 118
 119         while (optind < argc) {
 120                 printf("%s ", argv[optind]);
 121                 int pid = pidstr_is_ok(argv[optind]);
 122
 123                 if (pid) {
 124                         opts->parse_mask |= PARSE_PID;
 125                         add_pid_to_pidlist(pid, &opts->pidlist);
 126                 } else {
 127                         get_all_pids_by_name(opts, argv[optind]);
 128                         opts->parse_mask |= PARSE_PID;
 129                 }
 130                 optind++;
 131         }
 132 }
 133
 134 int main(int argc, char *argv[])
 135 {
 136         struct pageframe pf;
 137         struct process process_list;
 138         struct parse_opts opts;
 139
 140         if (geteuid()) {
 141                 printf("WARNING: Running without root priviledges. "
 142                         "Results may be inaccurate\n");
 143         }
 144
 145         init_parse_opts(&opts);
 146
 147         read_args(argc, argv, &opts);
 148
 149         if (argc < 2) {
 150                 printf("A pid or process name "
 151                         "needs to be given as an argument\n");
 152                 print_help_and_die(argv[0]);
 153         }
 154
 155         clear_pageframe(&pf);
 156
 157         memset(&process_list, 0, sizeof(process_list));
 158         INIT_LIST_HEAD(&process_list.list);
 159
 160         if (scan_all_pids(&pf, &process_list, &opts))
 161                 return 1;
 162
 163         update_kpageflags(&pf);
 164
 165         if (opts.parse_mask & PARSE_DUMP)
 166                 dump_process_maps(&pf, &process_list, &opts);
 167         else
 168                 print_pid_stats(&pf, &process_list, &opts);
 169
 170         print_page_stats(&pf);
 171
 172         return 0;
 173 }