LXR linux/tools/perf/util/find-map.c

   1// SPDX-License-Identifier: GPL-2.0
   2static 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}
  31