Fixed memory leak with RAID tables

Fixed tests for RAID tables
Detect uninitialized mutexes on lock and destroy


mysql-test/r/raid.result:
  Updated results
mysql-test/r/rpl_change_master.result:
  Update results missing from last patch
mysql-test/t/raid.test:
  Clean up test
mysys/mf_iocache.c:
  Comments
  Small safety fix
mysys/thr_mutex.c:
  Detect uninitialized mutexes on lock and destroy
sql/sql_db.cc:
  Fixed memory leak with RAID tables

mysql-test/r/raid.result

@@ -1,7 +1,8 @@
-create database test_raid;
-create table test_raid.r1 (i int) raid_type=1;
-drop database test_raid;
 DROP TABLE IF EXISTS t1,t2;
+DROP DATABASE IF EXISTS test_$1;
+create database test_$1;
+create table test_$1.r1 (i int) raid_type=1;
+drop database test_$1;
 CREATE TABLE t1 (
 id int unsigned not null auto_increment primary key,
 c char(255) not null
@@ -99,7 +100,6 @@ count(*)
 450
 DROP TABLE t2;
 /* variable rows */
-DROP TABLE IF EXISTS t2;
 CREATE TABLE t1 (
 id int unsigned not null auto_increment primary key,
 c varchar(255) not null

mysql-test/r/rpl_change_master.result

@@ -15,11 +15,11 @@ select * from t1;
 n
 1
 show slave status;
-Slave_IO_State	Master_Host	Master_User	Master_Port	Connect_retry	Master_Log_File	Read_Master_Log_Pos	Relay_Log_File	Relay_Log_Pos	Relay_Master_Log_File	Slave_IO_Running	Slave_SQL_Running	Replicate_do_db	Replicate_ignore_db	Replicate_do_table	Replicate_ignore_table	Replicate_wild_do_table	Replicate_wild_ignore_table	Last_errno	Last_error	Skip_counter	Exec_master_log_pos	Relay_log_space	Until_condition	Until_Log_File	Until_Log_pos	Master_SSL_Allowed	Master_SSL_CA_File	Master_SSL_CA_Path	Master_SSL_Cert	Master_SSL_Cipher	Master_SSL_Key	Seconds_behind_master
+Slave_IO_State	Master_Host	Master_User	Master_Port	Connect_Retry	Master_Log_File	Read_Master_Log_Pos	Relay_Log_File	Relay_Log_Pos	Relay_Master_Log_File	Slave_IO_Running	Slave_SQL_Running	Replicate_Do_DB	Replicate_Ignore_DB	Replicate_Do_Table	Replicate_Ignore_Table	Replicate_Wild_Do_Table	Replicate_Wild_Ignore_Table	Last_Errno	Last_Error	Skip_Counter	Exec_Master_Log_Pos	Relay_Log_Space	Until_Condition	Until_Log_File	Until_Log_Pos	Master_SSL_Allowed	Master_SSL_CA_File	Master_SSL_CA_Path	Master_SSL_Cert	Master_SSL_Cipher	Master_SSL_Key	Seconds_Behind_Master
 #	127.0.0.1	root	9306	1	master-bin.000001	273	slave-relay-bin.000002	258	master-bin.000001	No	No							0		0	214	317	None		0	No						#
 change master to master_user='root';
 show slave status;
-Slave_IO_State	Master_Host	Master_User	Master_Port	Connect_retry	Master_Log_File	Read_Master_Log_Pos	Relay_Log_File	Relay_Log_Pos	Relay_Master_Log_File	Slave_IO_Running	Slave_SQL_Running	Replicate_do_db	Replicate_ignore_db	Replicate_do_table	Replicate_ignore_table	Replicate_wild_do_table	Replicate_wild_ignore_table	Last_errno	Last_error	Skip_counter	Exec_master_log_pos	Relay_log_space	Until_condition	Until_Log_File	Until_Log_pos	Master_SSL_Allowed	Master_SSL_CA_File	Master_SSL_CA_Path	Master_SSL_Cert	Master_SSL_Cipher	Master_SSL_Key	Seconds_behind_master
+Slave_IO_State	Master_Host	Master_User	Master_Port	Connect_Retry	Master_Log_File	Read_Master_Log_Pos	Relay_Log_File	Relay_Log_Pos	Relay_Master_Log_File	Slave_IO_Running	Slave_SQL_Running	Replicate_Do_DB	Replicate_Ignore_DB	Replicate_Do_Table	Replicate_Ignore_Table	Replicate_Wild_Do_Table	Replicate_Wild_Ignore_Table	Last_Errno	Last_Error	Skip_Counter	Exec_Master_Log_Pos	Relay_Log_Space	Until_Condition	Until_Log_File	Until_Log_Pos	Master_SSL_Allowed	Master_SSL_CA_File	Master_SSL_CA_Path	Master_SSL_Cert	Master_SSL_Cipher	Master_SSL_Key	Seconds_Behind_Master
 #	127.0.0.1	root	9306	1	master-bin.000001	214	slave-relay-bin.000001	4	master-bin.000001	No	No							0		0	214	4	None		0	No						#
 select release_lock("a");
 release_lock("a")

mysql-test/t/raid.test

@@ -9,6 +9,7 @@ enable_query_log;
 
 --disable_warnings
 DROP TABLE IF EXISTS t1,t2;
+DROP DATABASE IF EXISTS test_$1;
 --enable_warnings
 
 #
@@ -111,8 +112,8 @@ ALTER TABLE t1 DROP COLUMN x;
 ALTER TABLE t1 RENAME t2;
 select count(*) from t2;
 DROP TABLE t2;
+
 /* variable rows */
-DROP TABLE IF EXISTS t2;
 CREATE TABLE t1 (
 id int unsigned not null auto_increment primary key,
 c varchar(255) not null

mysys/mf_iocache.c

@@ -110,11 +110,29 @@ init_functions(IO_CACHE* info, enum cache_type type)
   }
 }
 
-	/*
+
-	** if cachesize == 0 then use default cachesize (from s-file)
+/*
-	** if file == -1 then real_open_cached_file() will be called.
+  Initialize an IO_CACHE object
-	** returns 0 if ok
+
-	*/
+  SYNOPSOS
+    init_io_cache()
+    info		cache handler to initialize
+    file		File that should be associated to to the handler
+			If == -1 then real_open_cached_file()
+			will be called when it's time to open file.
+    cachesize		Size of buffer to allocate for read/write
+			If == 0 then use my_default_record_cache_size
+    type		Type of cache
+    seek_offset		Where cache should start reading/writing
+    use_async_io	Set to 1 of we should use async_io (if avaiable)
+    cache_myflags	Bitmap of differnt flags
+			MY_WME | MY_FAE | MY_NABP | MY_FNABP |
+			MY_DONT_CHECK_FILESIZE
+
+  RETURN
+    0  ok
+    #  error
+*/
 
 int init_io_cache(IO_CACHE *info, File file, uint cachesize,
 		  enum cache_type type, my_off_t seek_offset,
@@ -127,7 +145,7 @@ int init_io_cache(IO_CACHE *info, File file, uint cachesize,
 		      (ulong) info, (int) type, (ulong) seek_offset));
 
   info->file= file;
-  info->type=type;
+  info->type= 0;		/* Don't set it until mutex are created */
   info->pos_in_file= seek_offset;
   info->pre_close = info->pre_read = info->post_read = 0;
   info->arg = 0;
@@ -138,8 +156,7 @@ int init_io_cache(IO_CACHE *info, File file, uint cachesize,
   info->share=0;
 #endif
 
-  if (!cachesize)
+  if (!cachesize && !(cachesize= my_default_record_cache_size))
-    if (! (cachesize= my_default_record_cache_size))
     DBUG_RETURN(1);				/* No cache requested */
   min_cache=use_async_io ? IO_SIZE*4 : IO_SIZE*2;
   if (type == READ_CACHE || type == SEQ_READ_APPEND)
@@ -201,6 +218,13 @@ int init_io_cache(IO_CACHE *info, File file, uint cachesize,
     pthread_mutex_init(&info->append_buffer_lock,MY_MUTEX_INIT_FAST);
 #endif
   }
+#if defined(SAFE_MUTEX) && defined(THREAD)
+  else
+  {
+    /* Clear mutex so that safe_mutex will notice that it's not initialized */
+    bzero((char*) &info->append_buffer_lock, sizeof(info));
+  }
+#endif
 
   if (type == WRITE_CACHE)
     info->write_end=
@@ -211,6 +235,7 @@ int init_io_cache(IO_CACHE *info, File file, uint cachesize,
   /* End_of_file may be changed by user later */
   info->end_of_file= end_of_file;
   info->error=0;
+  info->type= type;
   init_functions(info,type);
 #ifdef HAVE_AIOWAIT
   if (use_async_io && ! my_disable_async_io)
@@ -1142,6 +1167,22 @@ int _flush_io_cache(IO_CACHE *info, int need_append_buffer_lock)
   DBUG_RETURN(0);
 }
 
+/*
+  Free an IO_CACHE object
+
+  SYNOPSOS
+    end_io_cache()
+    info		IO_CACHE Handle to free
+
+  NOTES
+    It's currently safe to call this if one has called io_cache_init()
+    on the 'info' object, even if io_cache_init() failed.
+    This function is also safe to call twice with the same handle.
+
+  RETURN
+   0  ok
+   #  Error
+*/
 
 int end_io_cache(IO_CACHE *info)
 {
@@ -1164,7 +1205,10 @@ int end_io_cache(IO_CACHE *info)
 #endif
 
   if ((pre_close=info->pre_close))
+  {
     (*pre_close)(info);
+    info->pre_close= 0;
+  }
   if (info->alloced_buffer)
   {
     info->alloced_buffer=0;

mysys/thr_mutex.c

@@ -97,7 +97,9 @@ int safe_mutex_lock(safe_mutex_t *mp,const char *file, uint line)
   int error;
   if (!mp->file)
   {
-    fprintf(stderr,"safe_mutex: Trying to lock unitialized mutex at %s, line %d",  file, line);
+    fprintf(stderr,
+	    "safe_mutex: Trying to lock unitialized mutex at %s, line %d\n",
+	    file, line);
     fflush(stderr);
     abort();
   }
@@ -262,6 +264,14 @@ int safe_cond_timedwait(pthread_cond_t *cond, safe_mutex_t *mp,
 int safe_mutex_destroy(safe_mutex_t *mp, const char *file, uint line)
 {
   int error=0;
+  if (!mp->file)
+  {
+    fprintf(stderr,
+	    "safe_mutex: Trying to destroy unitialized mutex at %s, line %d\n",
+	    file, line);
+    fflush(stderr);
+    abort();
+  }
   if (mp->count != 0)
   {
     fprintf(stderr,"safe_mutex: Trying to destroy a mutex that was locked at %s, line %d at %s, line %d\n",

sql/sql_db.cc

@@ -440,7 +440,6 @@ static long mysql_rm_known_files(THD *thd, MY_DIR *dirp, const char *db,
   char filePath[FN_REFLEN];
   TABLE_LIST *tot_list=0, **tot_list_next;
   List<String> raid_dirs;
-
   DBUG_ENTER("mysql_rm_known_files");
   DBUG_PRINT("enter",("path: %s", org_path));
 
@@ -516,17 +515,24 @@ static long mysql_rm_known_files(THD *thd, MY_DIR *dirp, const char *db,
       deleted++;
     }
   }
+  List_iterator<String> it(raid_dirs);
+  String *dir;
+
   if (thd->killed ||
       (tot_list && mysql_rm_table_part2_with_lock(thd, tot_list, 1, 0, 1)))
   {
+    /* Free memory for allocated raid dirs */
+    while ((dir= it++))
+      delete dir;
     my_dirend(dirp);
     DBUG_RETURN(-1);
   }
-  List_iterator<String> it(raid_dirs);
-  String *dir;
   while ((dir= it++))
+  {
     if (rmdir(dir->c_ptr()) < 0)
       found_other_files++;
+    delete dir;
+  }
   my_dirend(dirp);  
   
   /*