valgrind

brew install valgrind

valgrind --leak-check=yes myprog arg1 arg2
valgrind --leak-check=full --show-leak-kinds=all --verbose --track-origins=yes myprog

• https://valgrind.org/docs/manual/manual-core-adv.html#manual-core-adv.clientreq

int run_within_valgrind (void) {
  char *p = getenv ("LD_PRELOAD");
  if (p == NULL)
    return 0;
  return (strstr (p, "/valgrind/") != NULL || strstr (p, "/vgpreload") != NULL);
}

FAQ

Uninitialised value was created by a stack allocation

Conditional jump or move depends on uninitialised value(s)

Invalid read of size, Invalid write of size