Merge work:/home/bk/mysql into hundin.mysql.fi:/my/bk/mysql

Docs/manual.texi

@@ -7252,7 +7252,7 @@ MySQL. How well a certain platform is suited for a high-load
 mission critical MySQL server is determined by the following
 factors:
 
-@itemize
+@itemize @bullet
 @item
 General stability of the thread library. A platform may have excellent
 reputation otherwise, but if the thread library is unstable in the code
@@ -7384,7 +7384,7 @@ If you want to configure @code{mysqld} with some extra features that are
 NOT in the standard binary distributions.  Here is a list of the most 
 common extra options that you may want to use:
 
-@itemize
+@itemize @bullet
 @item @code{--with-berkeley-db}
 @item @code{--with-innodb}
 @item @code{--with-raid}
@@ -23950,7 +23950,7 @@ to it clean up.
  You should start by creating a wrapper library
 /module with the following functions:
 
-@itemize
+@itemize @bullet
 @item
 @code{safe_writer_connect()}
 @item
@@ -26902,7 +26902,7 @@ flag again, the @code{SQL_MAX_JOIN_SIZE} variable will be ignored.
 You can set a default value for this variable by starting @code{mysqld} with
 @code{-O max_join_size=#}.
 
-@item SQL_SAFE_MODE = 0 | 1
+@item SQL_SAFE_UPDATES = 0 | 1
 If set to @code{1}, MySQL will abort if an @code{UPDATE} or
 @code{DELETE} is attempted that doesn't use a key or @code{LIMIT} in the
 @code{WHERE} clause. This makes it possible to catch wrong updates
@@ -34893,7 +34893,7 @@ effectiveness.  Modifying the default behavior will, in most cases,
 only make the search results worse.  Do not alter the MySQL sources
 unless you know what you are doing!
 
-@itemize
+@itemize @bullet
 
 @item
 Minimal length of word to be indexed is defined in
@@ -42849,7 +42849,7 @@ Unfortunately, we have not yet written full documentation for it - we plan to
 do this shortly.  You can, however, look at our current test cases and use 
 them as an example.  The following points should help you get started:
 
-@itemize
+@itemize @bullet
 @item
 The tests are located in @code{mysql-test/t/*.test}
 
@@ -46712,6 +46712,12 @@ not yet 100% confident in this code.
 @appendixsubsec Changes in release 3.23.42
 @itemize @bullet
 @item
+Fixed rare hang when doing @code{mysqladmin shutdown} when there was
+a lot of activity in other threads.
+@item
+Fixed problem with @code{INSERT DELAYED} where delay thread could be
+hanging on @code{upgrading locks} without any apparent reasons.
+@item
 Fixed problem with @code{myisampack} and @code{BLOB}.
 @item
 Fixes problem when one edited @code{.MRG} tables by hand.

include/my_pthread.h

@@ -575,12 +575,14 @@ extern int pthread_dummy(int);
 struct st_my_thread_var
 {
   int thr_errno;
-  pthread_cond_t suspend, *current_cond;
-  pthread_mutex_t mutex,  *current_mutex;
+  pthread_cond_t suspend;
+  pthread_mutex_t mutex;
+  pthread_mutex_t * volatile current_mutex;
+  pthread_cond_t * volatile current_cond;
   pthread_t pthread_self;
   long id;
   int cmp_length;
-  volatile int abort;
+  int volatile abort;
 #ifndef DBUG_OFF
   gptr dbug;
   char name[THREAD_NAME_SIZE+1];

mysys/thr_lock.c

@@ -115,7 +115,7 @@ my_bool init_thr_lock()
 static uint found_errors=0;
 
 static int check_lock(struct st_lock_list *list, const char* lock_type,
-		      const char *where, my_bool same_thread)
+		      const char *where, my_bool same_thread, bool no_cond)
 {
   THR_LOCK_DATA *data,**prev;
   uint count=0;
@@ -148,6 +148,13 @@ static int check_lock(struct st_lock_list *list, const char* lock_type,
 		lock_type,where);
 	return 1;
       }
+      if (no_cond && data->cond)
+      {
+	fprintf(stderr,
+		"Warning: Found active lock with not reset cond %s: %s\n",
+		lock_type,where);
+	return 1;
+      }
       prev= &data->next;
     }
     if (data)
@@ -172,10 +179,10 @@ static void check_locks(THR_LOCK *lock, const char *where,
   uint old_found_errors=found_errors;
   if (found_errors < MAX_FOUND_ERRORS)
   {
-    if (check_lock(&lock->write,"write",where,1) |
-	check_lock(&lock->write_wait,"write_wait",where,0) |
-	check_lock(&lock->read,"read",where,0) |
-	check_lock(&lock->read_wait,"read_wait",where,0))
+    if (check_lock(&lock->write,"write",where,1,1) |
+	check_lock(&lock->write_wait,"write_wait",where,0,0) |
+	check_lock(&lock->read,"read",where,0,1) |
+	check_lock(&lock->read_wait,"read_wait",where,0,0))
       found_errors++;
 
     if (found_errors < MAX_FOUND_ERRORS)
@@ -326,6 +333,7 @@ void thr_lock_data_init(THR_LOCK *lock,THR_LOCK_DATA *data, void *param)
   data->thread=pthread_self();
   data->thread_id=my_thread_id();		/* for debugging */
   data->status_param=param;
+  data->cond=0;
 }
 
 
@@ -366,16 +374,16 @@ static my_bool wait_for_lock(struct st_lock_list *wait, THR_LOCK_DATA *data,
   }
 
   /* Set up control struct to allow others to abort locks */
-  pthread_mutex_lock(&thread_var->mutex);
   thread_var->current_mutex= &data->lock->mutex;
   thread_var->current_cond=  cond;
-  pthread_mutex_unlock(&thread_var->mutex);
 
   data->cond=cond;
-  do
+  while (!thread_var->abort || in_wait_list)
   {
     pthread_cond_wait(cond,&data->lock->mutex);
-  } while (data->cond == cond && (!thread_var->abort || in_wait_list));
+    if (data->cond != cond)
+      break;
+  }
 
   if (data->cond || data->type == TL_UNLOCK)
   {
@@ -416,6 +424,7 @@ int thr_lock(THR_LOCK_DATA *data,enum thr_lock_type lock_type)
   DBUG_ENTER("thr_lock");
 
   data->next=0;
+  data->cond=0;					/* safety */
   data->type=lock_type;
   data->thread=pthread_self();			/* Must be reset ! */
   data->thread_id=my_thread_id();		/* Must be reset ! */
@@ -977,6 +986,10 @@ my_bool thr_upgrade_write_delay_lock(THR_LOCK_DATA *data)
     lock->write_wait.data=data;
     check_locks(lock,"upgrading lock",0);
   }
+  else
+  {
+    check_locks(lock,"waiting for lock",0);
+  }
   DBUG_RETURN(wait_for_lock(&lock->write_wait,data,1));
 }
 

sql/item_func.cc

@@ -1500,11 +1500,9 @@ longlong Item_func_get_lock::val_int()
 
   /* structure is now initialized.  Try to get the lock */
   /* Set up control struct to allow others to abort locks */
-  pthread_mutex_lock(&thd->mysys_var->mutex);
   thd->proc_info="User lock";
   thd->mysys_var->current_mutex= &LOCK_user_locks;
   thd->mysys_var->current_cond=  &ull->cond;
-  pthread_mutex_unlock(&thd->mysys_var->mutex);
 
 #ifdef HAVE_TIMESPEC_TS_SEC
   abstime.ts_sec=time((time_t*) 0)+(time_t) timeout;
@@ -1514,15 +1512,11 @@ longlong Item_func_get_lock::val_int()
   abstime.tv_nsec=0;
 #endif
 
-  while ((error=pthread_cond_timedwait(&ull->cond,&LOCK_user_locks,&abstime))
-	 != ETIME && error != ETIMEDOUT && ull->locked)
-  {
-    if (thd->killed || abort_loop)
-    {
+  while (!thd->killed &&
+	 (error=pthread_cond_timedwait(&ull->cond,&LOCK_user_locks,&abstime))
+	 != ETIME && error != ETIMEDOUT && ull->locked) ;
+  if (thd->killed)
     error=EINTR;				// Return NULL
-      break;
-    }
-  }
   if (ull->locked)
   {
     if (!--ull->count)

sql/lock.cc

@@ -65,11 +65,9 @@ MYSQL_LOCK *mysql_lock_tables(THD *thd,TABLE **tables,uint count)
       }	
 
       pthread_mutex_lock(&LOCK_open);
-      pthread_mutex_lock(&thd->mysys_var->mutex);
       thd->mysys_var->current_mutex= &LOCK_open;
       thd->mysys_var->current_cond= &COND_refresh;
       thd->proc_info="Waiting for table";
-      pthread_mutex_unlock(&thd->mysys_var->mutex);
 
       while (global_read_lock && ! thd->killed &&
 	     thd->version == refresh_version)

sql/mysqld.cc

@@ -509,12 +509,14 @@ static void close_connections(void)
     if (tmp->mysys_var)
     {
       tmp->mysys_var->abort=1;
-      if (tmp->mysys_var->current_mutex)
+      pthread_mutex_lock(&tmp->mysys_var->mutex);
+      if (tmp->mysys_var->current_cond)
       {
 	pthread_mutex_lock(tmp->mysys_var->current_mutex);
 	pthread_cond_broadcast(tmp->mysys_var->current_cond);
 	pthread_mutex_unlock(tmp->mysys_var->current_mutex);
       }
+      pthread_mutex_unlock(&tmp->mysys_var->mutex);
     }
   }
   (void) pthread_mutex_unlock(&LOCK_thread_count); // For unlink from list

sql/sql_base.cc

@@ -358,11 +358,9 @@ bool close_cached_tables(THD *thd, bool if_wait_for_refresh,
     */
     if (!tables)
       kill_delayed_threads();
-    pthread_mutex_lock(&thd->mysys_var->mutex);
     thd->mysys_var->current_mutex= &LOCK_open;
     thd->mysys_var->current_cond= &COND_refresh;
     thd->proc_info="Flushing tables";
-    pthread_mutex_unlock(&thd->mysys_var->mutex);
 
     close_old_data_files(thd,thd->open_tables,1,1);
     bool found=1;
@@ -667,12 +665,11 @@ void wait_for_refresh(THD *thd)
 {
   /* Wait until the current table is up to date */
   const char *proc_info;
-  pthread_mutex_lock(&thd->mysys_var->mutex);
   thd->mysys_var->current_mutex= &LOCK_open;
   thd->mysys_var->current_cond= &COND_refresh;
   proc_info=thd->proc_info;
   thd->proc_info="Waiting for table";
-  pthread_mutex_unlock(&thd->mysys_var->mutex);
+  if (!thd->killed)
     (void) pthread_cond_wait(&COND_refresh,&LOCK_open);
 
   pthread_mutex_unlock(&LOCK_open);	// Must be unlocked first
@@ -2182,7 +2179,7 @@ bool remove_table_from_cache(THD *thd, const char *db, const char *table_name,
       {
 	in_use->killed=1;
 	pthread_mutex_lock(&in_use->mysys_var->mutex);
-	if (in_use->mysys_var->current_mutex)
+	if (in_use->mysys_var->current_cond)
 	{
 	  pthread_mutex_lock(in_use->mysys_var->current_mutex);
 	  pthread_cond_broadcast(in_use->mysys_var->current_cond);

sql/sql_class.cc

@@ -226,7 +226,7 @@ void THD::prepare_to_die()
       pthread_mutex_lock(&mysys_var->mutex);
       if (!system_thread)		// Don't abort locks
 	mysys_var->abort=1;
-      if (mysys_var->current_mutex)
+      if (mysys_var->current_cond)
       {
 	pthread_mutex_lock(mysys_var->current_mutex);
 	pthread_cond_broadcast(mysys_var->current_cond);

sql/sql_class.h

@@ -326,11 +326,9 @@ class THD :public ilink {
 			  const char* msg)
   {
     const char* old_msg = proc_info;
-    pthread_mutex_lock(&mysys_var->mutex);
     mysys_var->current_mutex = mutex;
     mysys_var->current_cond = cond;
     proc_info = msg;
-    pthread_mutex_unlock(&mysys_var->mutex);
     return old_msg;
   }
   inline void exit_cond(const char* old_msg)

sql/sql_insert.cc

@@ -482,7 +482,7 @@ class delayed_insert :public ilink {
   COPY_INFO info;
   I_List<delayed_row> rows;
   uint group_count;
-  TABLE_LIST *table_list;			// Argument
+  TABLE_LIST table_list;			// Argument
 
   delayed_insert()
     :locks_in_memory(0),
@@ -511,10 +511,12 @@ class delayed_insert :public ilink {
     delayed_row *row;
     while ((row=rows.get()))
       delete row;
-    pthread_mutex_destroy(&mutex);
     if (table)
       close_thread_tables(&thd);
     VOID(pthread_mutex_lock(&LOCK_thread_count));
+    pthread_mutex_destroy(&mutex);
+    pthread_cond_destroy(&cond);
+    pthread_cond_destroy(&cond_client);
     thd.unlink();				// Must be unlinked under lock
     x_free(thd.query);
     thd.user=thd.host=0;
@@ -609,7 +611,9 @@ static TABLE *delayed_get_table(THD *thd,TABLE_LIST *table_list)
 	pthread_mutex_unlock(&LOCK_delayed_create);
 	DBUG_RETURN(0);
       }
-      tmp->table_list=table_list;			// Needed to open table
+      tmp->table_list= *table_list;			// Needed to open table
+      tmp->table_list.db= tmp->thd.db;
+      tmp->table_list.name= tmp->table_list.real_name=tmp->thd.query;
       tmp->lock();
       pthread_mutex_lock(&tmp->mutex);
       if ((error=pthread_create(&tmp->thd.real_id,&connection_attrib,
@@ -842,12 +846,10 @@ void kill_delayed_threads(void)
     if (tmp->thd.mysys_var)
     {
       pthread_mutex_lock(&tmp->thd.mysys_var->mutex);
-      if (tmp->thd.mysys_var->current_mutex)
+      if (tmp->thd.mysys_var->current_cond)
       {
-	if (&tmp->mutex != tmp->thd.mysys_var->current_mutex)
 	pthread_mutex_lock(tmp->thd.mysys_var->current_mutex);
 	pthread_cond_broadcast(tmp->thd.mysys_var->current_cond);
-	if (&tmp->mutex != tmp->thd.mysys_var->current_mutex)
 	pthread_mutex_unlock(tmp->thd.mysys_var->current_mutex);
       }
       pthread_mutex_unlock(&tmp->thd.mysys_var->mutex);
@@ -873,6 +875,7 @@ static pthread_handler_decl(handle_delayed_insert,arg)
   thd->thread_id=thread_id++;
   thd->end_time();
   threads.append(thd);
+  thd->killed=abort_loop;
   pthread_mutex_unlock(&LOCK_thread_count);
 
   pthread_mutex_lock(&di->mutex);
@@ -903,7 +906,7 @@ static pthread_handler_decl(handle_delayed_insert,arg)
 
   /* open table */
 
-  if (!(di->table=open_ltable(thd,di->table_list,TL_WRITE_DELAYED)))
+  if (!(di->table=open_ltable(thd,&di->table_list,TL_WRITE_DELAYED)))
   {
     thd->fatal_error=1;				// Abort waiting inserts
     goto end;
@@ -911,7 +914,7 @@ static pthread_handler_decl(handle_delayed_insert,arg)
   if (di->table->file->has_transactions())
   {
     thd->fatal_error=1;
-    my_error(ER_ILLEGAL_HA, MYF(0), di->table_list->real_name);
+    my_error(ER_ILLEGAL_HA, MYF(0), di->table_list.real_name);
     goto end;
   }
   di->table->copy_blobs=1;
@@ -963,14 +966,12 @@ static pthread_handler_decl(handle_delayed_insert,arg)
 #endif
 
       /* Information for pthread_kill */
-      pthread_mutex_lock(&di->thd.mysys_var->mutex);
       di->thd.mysys_var->current_mutex= &di->mutex;
       di->thd.mysys_var->current_cond= &di->cond;
-      pthread_mutex_unlock(&di->thd.mysys_var->mutex);
       di->thd.proc_info=0;
 
       DBUG_PRINT("info",("Waiting for someone to insert rows"));
-      for ( ; ;)
+      while (!thd->killed)
       {
 	int error;
 #if (defined(HAVE_BROKEN_COND_TIMEDWAIT) || defined(HAVE_LINUXTHREADS))
@@ -994,10 +995,13 @@ static pthread_handler_decl(handle_delayed_insert,arg)
 	  break;
 	}
       }
+      /* We can't lock di->mutex and mysys_var->mutex at the same time */
+      pthread_mutex_unlock(&di->mutex);
       pthread_mutex_lock(&di->thd.mysys_var->mutex);
       di->thd.mysys_var->current_mutex= 0;
       di->thd.mysys_var->current_cond= 0;
       pthread_mutex_unlock(&di->thd.mysys_var->mutex);
+      pthread_mutex_lock(&di->mutex);
     }
 
     if (di->tables_in_use && ! thd->lock)

sql/sql_repl.cc

@@ -414,12 +414,10 @@ void mysql_binlog_send(THD* thd, char* log_ident, ulong pos, ushort flags)
 	log.error=0;
 
 	// tell the kill thread how to wake us up
-	pthread_mutex_lock(&thd->mysys_var->mutex);
 	thd->mysys_var->current_mutex = log_lock;
 	thd->mysys_var->current_cond = &COND_binlog_update;
 	const char* proc_info = thd->proc_info;
 	thd->proc_info = "Slave connection: waiting for binlog update";
-	pthread_mutex_unlock(&thd->mysys_var->mutex);
 
 	bool read_packet = 0, fatal_error = 0;
 
@@ -444,6 +442,7 @@ void mysql_binlog_send(THD* thd, char* log_ident, ulong pos, ushort flags)
 	  break;
 	case LOG_READ_EOF:
 	  DBUG_PRINT("wait",("waiting for data on binary log"));
+	  if (!thd->killed)
 	    pthread_cond_wait(&COND_binlog_update, log_lock);
 	  break;
 
@@ -694,9 +693,9 @@ void kill_zombie_dump_threads(uint32 slave_server_id)
 	  
 	  thr_alarm_kill(tmp->real_id);
 	  tmp->killed = 1;
-	  pthread_mutex_lock(&tmp->mysys_var->mutex);
           tmp->mysys_var->abort = 1;
-	  if(tmp->mysys_var->current_mutex)
+	  pthread_mutex_lock(&tmp->mysys_var->mutex);
+	  if(tmp->mysys_var->current_cond)
 	    {
 	      pthread_mutex_lock(tmp->mysys_var->current_mutex);
 	      pthread_cond_broadcast(tmp->mysys_var->current_cond);

sql/sql_table.cc

@@ -53,11 +53,9 @@ int mysql_rm_table(THD *thd,TABLE_LIST *tables, my_bool if_exists)
 
   /* mark for close and remove all cached entries */
 
-  pthread_mutex_lock(&thd->mysys_var->mutex);
   thd->mysys_var->current_mutex= &LOCK_open;
   thd->mysys_var->current_cond= &COND_refresh;
   VOID(pthread_mutex_lock(&LOCK_open));
-  pthread_mutex_unlock(&thd->mysys_var->mutex);
 
   if (global_read_lock)
   {