2194   struct malloc_chunk* fd;         /* double links -- used only if free. */  member
2412   struct malloc_tree_chunk* fd;  member
3175       int fd;  in init_mparams()  local
3178       if ((fd = open("/dev/urandom", O_RDONLY)) >= 0 &&  in init_mparams()
3179           read(fd, buf, sizeof(buf)) == sizeof(buf)) {  in init_mparams()
3181         close(fd);  in init_mparams()
3290       assert(p->fd->bk == p);  in do_check_free_chunk()
3291       assert(p->bk->fd == p);  in do_check_free_chunk()
3331     assert(u->fd->bk == u);  in do_check_tree()
3332     assert(u->bk->fd == u);  in do_check_tree()
3358     u = u->fd;  in do_check_tree()
3409       } while ((p = p->fd) != b);  in bin_find()
3427         } while ((u = u->fd) != t);  in bin_find()
3589   else if (RTCHECK(ok_address(M, B->fd)))\
3590     F = B->fd;\
3594   B->fd = P;\
3596   P->fd = F;\
3602   mchunkptr F = P->fd;\
3613                      (ok_address(M, B) && B->fd == P))) {\
3615       B->fd = F;\
3628   mchunkptr F = P->fd;\
3637     B->fd = F;\
3671     X->fd = X->bk = X;\
3685           X->fd = X->bk = X;\
3694         tchunkptr F = T->fd;\
3696           T->fd = F->bk = X;\
3697           X->fd = F;\
3732     tchunkptr F = X->fd;\
3734     if (RTCHECK(ok_address(M, F) && F->bk == X && R->fd == X)) {\
3736       R->fd = F;\
3928     bin->fd = bin->bk = bin;  in init_bins()
4598         p = b->fd;  in dlmalloc()
4616           p = b->fd;  in dlmalloc()
5555         p = b->fd;  in mspace_malloc()
5573           p = b->fd;  in mspace_malloc()