perf/util/find-map.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 static int find_map(void **start, void **end, const char *name)
0003 {
0004     FILE *maps;
0005     char line[128];
0006     int found = 0;
0007
0008     maps = fopen("/proc/self/maps", "r");
0009     if (!maps) {
0010         fprintf(stderr, "cannot open maps\n");
0011         return -1;
0012     }
0013
0014     while (!found && fgets(line, sizeof(line), maps)) {
0015         int m = -1;
0016
0017         /* We care only about private r-x mappings. */
0018         if (2 != sscanf(line, "%p-%p r-xp %*x %*x:%*x %*u %n",
0019                 start, end, &m))
0020             continue;
0021         if (m < 0)
0022             continue;
0023
0024         if (!strncmp(&line[m], name, strlen(name)))
0025             found = 1;
0026     }
0027
0028     fclose(maps);
0029     return !found;
0030 }