database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-29 05:21:33 +03:00
Code Activity

BUG#12611785 - AUDIT INTERFACE STRICT-ALIASING WARNINGS

Browse Source 
The types mysql_event_general/mysql_event_connection are
being cast to the incompatible type mysql_event. The way
mysql_event and the other types are designed are prone to
strict aliasing violations and can break things depending
on how compilers optimizes this code.

This patch fixes audit interface, so it confirms to strict-
aliasing rules. It introduces incompatible changes to audit
interface:
- mysql_event type has been removed;
- event_class has been removed from mysql_event_generic and
  mysql_event_connection types;
- st_mysql_audit::event_notify() second argument is event_class;
- st_mysql_audit::event_notify() third argument is event of type
  (const void *).

"Writing Audit Plugins" section of manual should be updated:
http://dev.mysql.com/doc/refman/5.5/en/writing-audit-plugins.html

include/mysql/plugin_audit.h:
  event_class has been moved out of mysql_event types.
include/mysql/plugin_audit.h.pp:
  event_class has been moved out of mysql_event types.
plugin/audit_null/audit_null.c:
  event_class has been moved out of mysql_event types.
sql/sql_audit.cc:
  event_class has been moved out of mysql_event types.
This commit is contained in:
Sergey Vojtovich
2011-06-03 11:27:11 +04:00
parent 9e2b7fa7d5
commit 95963dd20a
4 changed files with 31 additions and 37 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
include/mysql/plugin_audit.h.pp
View File

@ -43,7 +43,7 @@ typedef enum _thd_wait_type_e {
THD_WAIT_BINLOG= 8,
THD_WAIT_GROUP_COMMIT= 9,
THD_WAIT_SYNC= 10,
THD_WAIT_LAST= 11
THD_WAIT_LAST= 11
} thd_wait_type;
extern struct thd_wait_service_st {
void (*thd_wait_begin_func)(void*, int);
@ -195,13 +195,8 @@ void mysql_query_cache_invalidate4(void* thd,
void *thd_get_ha_data(const void* thd, const struct handlerton *hton);
void thd_set_ha_data(void* thd, const struct handlerton *hton,
const void *ha_data);
struct mysql_event
{
unsigned int event_class;
};
struct mysql_event_general
{
unsigned int event_class;
unsigned int event_subclass;
int general_error_code;
unsigned long general_thread_id;
@ -217,7 +212,6 @@ struct mysql_event_general
};
struct mysql_event_connection
{
unsigned int event_class;
unsigned int event_subclass;
int status;
unsigned long thread_id;
@ -240,6 +234,6 @@ struct st_mysql_audit
{
int interface_version;
void (*release_thd)(void*);
void (*event_notify)(void*, const struct mysql_event *);
void (*event_notify)(void*, unsigned int, const void *);
unsigned long class_mask[1];
};