diff --git a/lib/isc/include/isc/urcu.h b/lib/isc/include/isc/urcu.h index c4dfe6a180..d1acf99121 100644 --- a/lib/isc/include/isc/urcu.h +++ b/lib/isc/include/isc/urcu.h @@ -117,3 +117,54 @@ #define rcu_dereference(ptr) isc_qsbr_rcu_dereference(ptr) #endif /* RCU_QSBR */ + +/* clang-format off */ +/* + * Following definitions were copied from liburcu development branch to help + * with AddressSanitizer complaining about calling caa_container_of on NULL. + */ + +#if !defined(caa_container_of_check_null) +/* + * caa_container_of_check_null - Get the address of an object containing a field. + * + * @ptr: pointer to the field. + * @type: type of the object. + * @member: name of the field within the object. + * + * Return the address of the object containing the field. Return NULL if + * @ptr is NULL. + */ +#define caa_container_of_check_null(ptr, type, member) \ + __extension__ \ + ({ \ + const __typeof__(((type *) NULL)->member) * __ptr = (ptr); \ + (__ptr) ? (type *)((char *)__ptr - offsetof(type, member)) : NULL; \ + }) + +#define cds_lfht_entry(ptr, type, member) \ + caa_container_of_check_null(ptr, type, member) + +#undef cds_lfht_for_each_entry +#define cds_lfht_for_each_entry(ht, iter, pos, member) \ + for (cds_lfht_first(ht, iter), \ + pos = cds_lfht_entry(cds_lfht_iter_get_node(iter), \ + __typeof__(*(pos)), member); \ + pos != NULL; \ + cds_lfht_next(ht, iter), \ + pos = cds_lfht_entry(cds_lfht_iter_get_node(iter), \ + __typeof__(*(pos)), member)) + +#undef cds_lfht_for_each_entry_duplicate +#define cds_lfht_for_each_entry_duplicate(ht, hash, match, key, \ + iter, pos, member) \ + for (cds_lfht_lookup(ht, hash, match, key, iter), \ + pos = cds_lfht_entry(cds_lfht_iter_get_node(iter), \ + __typeof__(*(pos)), member); \ + pos != NULL; \ + cds_lfht_next_duplicate(ht, match, key, iter), \ + pos = cds_lfht_entry(cds_lfht_iter_get_node(iter), \ + __typeof__(*(pos)), member)) + +#endif /* !defined(caa_container_of_check_null) */ +/* clang-format on */