libc-bottom-half/sources/reallocarray.c

   1 #include <stdlib.h>
   2 #include <errno.h>
   3
   4 void *__reallocarray(void *ptr, size_t nmemb, size_t size) {
   5     size_t bytes;
   6     if (__builtin_umull_overflow(nmemb, size, &bytes)) {
   7         errno = ENOMEM;
   8         return NULL;
   9     }
  10     return realloc(ptr, bytes);
  11 }
  12
  13 void *reallocarray(void *ptr, size_t nmemb, size_t size)
  14     __attribute__((__weak__, __alias__("__reallocarray")));