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This commit is contained in:
Michael Widenius 2013-03-25 16:10:28 +02:00
commit 2c40fb5689
9 changed files with 82 additions and 79 deletions
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44
mysql-test/suite/perfschema/r/func_mutex.result
View file

@ -70,52 +70,34 @@ Success
TRUNCATE TABLE performance_schema.events_waits_history_long;
TRUNCATE TABLE performance_schema.events_waits_history;
TRUNCATE TABLE performance_schema.events_waits_current;
SELECT * FROM t1 WHERE id = 1;
id b
1 initial value
show variables like "%not_found%";
Variable_name Value
SET @before_count = (SELECT SUM(TIMER_WAIT)
FROM performance_schema.events_waits_history_long
WHERE (EVENT_NAME = 'wait/synch/rwlock/sql/LOCK_grant'));
SELECT * FROM t1;
id b
1 initial value
2 initial value
3 initial value
4 initial value
5 initial value
6 initial value
7 initial value
8 initial value
WHERE (EVENT_NAME = 'wait/synch/rwlock/sql/LOCK_system_variables_hash'));
show variables like "%not_found%";
Variable_name Value
SET @after_count = (SELECT SUM(TIMER_WAIT)
FROM performance_schema.events_waits_history_long
WHERE (EVENT_NAME = 'wait/synch/rwlock/sql/LOCK_grant'));
WHERE (EVENT_NAME = 'wait/synch/rwlock/sql/LOCK_system_variables_hash'));
SELECT IF((@after_count - @before_count) > 0, 'Success', 'Failure') test_fm1_rw_timed;
test_fm1_rw_timed
Success
UPDATE performance_schema.setup_instruments SET enabled = 'NO'
WHERE NAME = 'wait/synch/rwlock/sql/LOCK_grant';
WHERE NAME = 'wait/synch/rwlock/sql/LOCK_system_variables_hash';
TRUNCATE TABLE performance_schema.events_waits_history_long;
TRUNCATE TABLE performance_schema.events_waits_history;
TRUNCATE TABLE performance_schema.events_waits_current;
SELECT * FROM t1 WHERE id = 1;
id b
1 initial value
show variables like "%not_found%";
Variable_name Value
SET @before_count = (SELECT SUM(TIMER_WAIT)
FROM performance_schema.events_waits_history_long
WHERE (EVENT_NAME = 'wait/synch/rwlock/sql/LOCK_grant'));
SELECT * FROM t1;
id b
1 initial value
2 initial value
3 initial value
4 initial value
5 initial value
6 initial value
7 initial value
8 initial value
WHERE (EVENT_NAME = 'wait/synch/rwlock/sql/LOCK_system_variables_hash'));
show variables like "%not_found%";
Variable_name Value
SET @after_count = (SELECT SUM(TIMER_WAIT)
FROM performance_schema.events_waits_history_long
WHERE (EVENT_NAME = 'wait/synch/rwlock/sql/LOCK_grant'));
WHERE (EVENT_NAME = 'LOCK_system_variables_hash'));
SELECT IF((COALESCE(@after_count, 0) - COALESCE(@before_count, 0)) = 0, 'Success', 'Failure') test_fm2_rw_timed;
test_fm2_rw_timed
Success

18
mysql-test/suite/perfschema/t/func_mutex.test
View file

@ -87,38 +87,38 @@ TRUNCATE TABLE performance_schema.events_waits_history_long;
TRUNCATE TABLE performance_schema.events_waits_history;
TRUNCATE TABLE performance_schema.events_waits_current;
SELECT * FROM t1 WHERE id = 1;
show variables like "%not_found%";
SET @before_count = (SELECT SUM(TIMER_WAIT)
FROM performance_schema.events_waits_history_long
WHERE (EVENT_NAME = 'wait/synch/rwlock/sql/LOCK_grant'));
WHERE (EVENT_NAME = 'wait/synch/rwlock/sql/LOCK_system_variables_hash'));
SELECT * FROM t1;
show variables like "%not_found%";
SET @after_count = (SELECT SUM(TIMER_WAIT)
FROM performance_schema.events_waits_history_long
WHERE (EVENT_NAME = 'wait/synch/rwlock/sql/LOCK_grant'));
WHERE (EVENT_NAME = 'wait/synch/rwlock/sql/LOCK_system_variables_hash'));
SELECT IF((@after_count - @before_count) > 0, 'Success', 'Failure') test_fm1_rw_timed;
UPDATE performance_schema.setup_instruments SET enabled = 'NO'
WHERE NAME = 'wait/synch/rwlock/sql/LOCK_grant';
WHERE NAME = 'wait/synch/rwlock/sql/LOCK_system_variables_hash';
TRUNCATE TABLE performance_schema.events_waits_history_long;
TRUNCATE TABLE performance_schema.events_waits_history;
TRUNCATE TABLE performance_schema.events_waits_current;
SELECT * FROM t1 WHERE id = 1;
show variables like "%not_found%";
SET @before_count = (SELECT SUM(TIMER_WAIT)
FROM performance_schema.events_waits_history_long
WHERE (EVENT_NAME = 'wait/synch/rwlock/sql/LOCK_grant'));
WHERE (EVENT_NAME = 'wait/synch/rwlock/sql/LOCK_system_variables_hash'));
SELECT * FROM t1;
show variables like "%not_found%";
SET @after_count = (SELECT SUM(TIMER_WAIT)
FROM performance_schema.events_waits_history_long
WHERE (EVENT_NAME = 'wait/synch/rwlock/sql/LOCK_grant'));
WHERE (EVENT_NAME = 'LOCK_system_variables_hash'));
SELECT IF((COALESCE(@after_count, 0) - COALESCE(@before_count, 0)) = 0, 'Success', 'Failure') test_fm2_rw_timed;

10
mysys/my_gethwaddr.c
View file

@ -87,13 +87,17 @@ my_bool my_gethwaddr(uchar *to)
int fd, res= 1;
struct ifreq ifr[32];
struct ifconf ifc;
DBUG_ENTER("my_gethwaddr");
ifc.ifc_req= ifr;
ifc.ifc_len= sizeof(ifr);
fd = socket(AF_INET, SOCK_DGRAM, 0);
if (fd < 0)
{
DBUG_PRINT("error", ("socket() call failed with %d", errno));
goto err;
}
if (ioctl(fd, SIOCGIFCONF, (char*)&ifc) >= 0)
{
@ -106,8 +110,8 @@ my_bool my_gethwaddr(uchar *to)
ETHER_ADDR_LEN);
#else
/*
A bug in OpenSolaris used to prevent non-root from getting a mac address:
{no url. Oracle killed the old OpenSolaris bug database}
A bug in OpenSolaris used to prevent non-root from getting a mac
address: {no url. Oracle killed the old OpenSolaris bug database}
Thus, we'll use an alternative method and extract the address from the
arp table.
@ -124,7 +128,7 @@ my_bool my_gethwaddr(uchar *to)
close(fd);
err:
return res;
DBUG_RETURN(res);
}
#elif defined(_WIN32)

21
sql/mysqld.cc
View file

@ -2529,7 +2529,7 @@ void unlink_thd(THD *thd)
cache_thread()
NOTES
LOCK_thread_cache has to be locked
LOCK_thread_cache is used to protect the cache variables
RETURN
0 Thread was not put in cache
@ -2542,7 +2542,7 @@ static bool cache_thread()
{
DBUG_ENTER("cache_thread");
mysql_mutex_assert_owner(&LOCK_thread_cache);
mysql_mutex_lock(&LOCK_thread_cache);
if (cached_thread_count < thread_cache_size &&
! abort_loop && !kill_cached_threads)
{
@ -2569,6 +2569,8 @@ static bool cache_thread()
THD *thd;
wake_thread--;
thd= thread_cache.get();
mysql_mutex_unlock(&LOCK_thread_cache);
thd->thread_stack= (char*) &thd; // For store_globals
(void) thd->store_globals();
@ -2594,10 +2596,15 @@ static bool cache_thread()
thd->mysys_var->abort= 0;
thd->thr_create_utime= microsecond_interval_timer();
thd->start_utime= thd->thr_create_utime;
/* Link thd into list of all active threads (THD's) */
mysql_mutex_lock(&LOCK_thread_count);
threads.append(thd);
mysql_mutex_unlock(&LOCK_thread_count);
DBUG_RETURN(1);
}
}
mysql_mutex_unlock(&LOCK_thread_cache);
DBUG_RETURN(0);
}
@ -2627,14 +2634,8 @@ bool one_thread_per_connection_end(THD *thd, bool put_in_cache)
unlink_thd(thd);
/* Mark that current_thd is not valid anymore */
set_current_thd(0);
if (put_in_cache)
{
mysql_mutex_lock(&LOCK_thread_cache);
put_in_cache= cache_thread();
mysql_mutex_unlock(&LOCK_thread_cache);
if (put_in_cache)
DBUG_RETURN(0); // Thread is reused
}
if (put_in_cache && cache_thread())
DBUG_RETURN(0); // Thread is reused
/*
It's safe to check for thread_count outside of the mutex

2
sql/mysqld.h
View file

@ -450,7 +450,7 @@ inline query_id_t next_query_id()
my_atomic_rwlock_wrlock(&global_query_id_lock);
id= my_atomic_add64(&global_query_id, 1);
my_atomic_rwlock_wrunlock(&global_query_id_lock);
return (id+1);
return (id);
}
inline query_id_t get_query_id()

37
sql/sql_acl.cc
View file

@ -4530,12 +4530,16 @@ end:
@see check_access
@see check_table_access
@note This functions assumes that either number of tables to be inspected
@note
This functions assumes that either number of tables to be inspected
by it is limited explicitly (i.e. is is not UINT_MAX) or table list
used and thd->lex->query_tables_own_last value correspond to each
other (the latter should be either 0 or point to next_global member
of one of elements of this table list).
We delay locking of LOCK_grant until we really need it as we assume that
most privileges be resolved with user or db level accesses.
@return Access status
@retval FALSE Access granted; But column privileges might need to be
checked.
@ -4552,6 +4556,8 @@ bool check_grant(THD *thd, ulong want_access, TABLE_LIST *tables,
Security_context *sctx= thd->security_ctx;
uint i;
ulong orig_want_access= want_access;
my_bool locked= 0;
GRANT_TABLE *grant_table;
DBUG_ENTER("check_grant");
DBUG_ASSERT(number > 0);
@ -4575,11 +4581,9 @@ bool check_grant(THD *thd, ulong want_access, TABLE_LIST *tables,
*/
tl->grant.orig_want_privilege= (want_access & ~SHOW_VIEW_ACL);
}
number= i;
mysql_rwlock_rdlock(&LOCK_grant);
for (tl= tables;
tl && number-- && tl != first_not_own_table;
tl= tl->next_global)
for (tl= tables; number-- ; tl= tl->next_global)
{
sctx = test(tl->security_ctx) ? tl->security_ctx : thd->security_ctx;
@ -4632,13 +4636,18 @@ bool check_grant(THD *thd, ulong want_access, TABLE_LIST *tables,
}
continue;
}
GRANT_TABLE *grant_table= table_hash_search(sctx->host, sctx->ip,
tl->get_db_name(),
sctx->priv_user,
tl->get_table_name(),
FALSE);
if (!grant_table)
if (!locked)
{
locked= 1;
mysql_rwlock_rdlock(&LOCK_grant);
}
if (!(grant_table= table_hash_search(sctx->host, sctx->ip,
tl->get_db_name(),
sctx->priv_user,
tl->get_table_name(),
FALSE)))
{
want_access &= ~tl->grant.privilege;
goto err; // No grants
@ -4665,11 +4674,13 @@ bool check_grant(THD *thd, ulong want_access, TABLE_LIST *tables,
goto err; // impossible
}
}
mysql_rwlock_unlock(&LOCK_grant);
if (locked)
mysql_rwlock_unlock(&LOCK_grant);
DBUG_RETURN(FALSE);
err:
mysql_rwlock_unlock(&LOCK_grant);
if (locked)
mysql_rwlock_unlock(&LOCK_grant);
if (!no_errors) // Not a silent skip of table
{
char command[128];

9
sql/sql_class.cc
View file

@ -4326,17 +4326,8 @@ void THD::set_query_and_id(char *query_arg, uint32 query_length_arg,
{
mysql_mutex_lock(&LOCK_thd_data);
set_query_inner(query_arg, query_length_arg, cs);
query_id= new_query_id;
mysql_mutex_unlock(&LOCK_thd_data);
}
/** Assign a new value to thd->query_id. */
void THD::set_query_id(query_id_t new_query_id)
{
mysql_mutex_lock(&LOCK_thd_data);
query_id= new_query_id;
mysql_mutex_unlock(&LOCK_thd_data);
}
/** Assign a new value to thd->mysys_var. */

5
sql/sql_class.h
View file

@ -3076,7 +3076,10 @@ public:
{ set_query(CSET_STRING()); }
void set_query_and_id(char *query_arg, uint32 query_length_arg,
CHARSET_INFO *cs, query_id_t new_query_id);
void set_query_id(query_id_t new_query_id);
void set_query_id(query_id_t new_query_id)
{
query_id= new_query_id;
}
void set_open_tables(TABLE *open_tables_arg)
{
mysql_mutex_lock(&LOCK_thd_data);

15
sql/sql_parse.cc
View file

@ -931,9 +931,16 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
thd->query_plan_flags= QPLAN_INIT;
thd->lex->sql_command= SQLCOM_END; /* to avoid confusing VIEW detectors */
thd->set_time();
thd->set_query_id(get_query_id());
if (!(server_command_flags[command] & CF_SKIP_QUERY_ID))
next_query_id();
thd->set_query_id(next_query_id());
else
{
/*
ping, get statistics or similar stateless command.
No reason to increase query id here.
*/
thd->set_query_id(get_query_id());
}
inc_thread_running();
if (!(server_command_flags[command] & CF_SKIP_QUESTIONS))
@ -5022,6 +5029,10 @@ check_access(THD *thd, ulong want_access, const char *db, ulong *save_priv,
if ((db != NULL) && (db != any_db))
{
/*
Check if this is reserved database, like information schema or
performance schema
*/
const ACL_internal_schema_access *access;
access= get_cached_schema_access(grant_internal_info, db);
if (access)