tools/perf/util/find-map.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 static int find_map(void **start, void **end, const char *name)
   3 {
   4         FILE *maps;
   5         char line[128];
   6         int found = 0;
   7
   8         maps = fopen("/proc/self/maps", "r");
   9         if (!maps) {
  10                 fprintf(stderr, "cannot open maps\n");
  11                 return -1;
  12         }
  13
  14         while (!found && fgets(line, sizeof(line), maps)) {
  15                 int m = -1;
  16
  17                 /* We care only about private r-x mappings. */
  18                 if (2 != sscanf(line, "%p-%p r-xp %*x %*x:%*x %*u %n",
  19                                 start, end, &m))
  20                         continue;
  21                 if (m < 0)
  22                         continue;
  23
  24                 if (!strncmp(&line[m], name, strlen(name)))
  25                         found = 1;
  26         }
  27
  28         fclose(maps);
  29         return !found;
  30 }