Fixed bug in wait_for_update() that I had introduced.

Changed option variables to my_bool (to avoid bugs in my_getopt())
Added new thread specific mutex LOCK_delete to be able to free LOCK_thread_count early.
Changed usage of LOCK_thread_count -> LOCK_status for statistics variables


libmysqld/lib_sql.cc:
  Removed not needed LOCK
mysql-test/mysql-test-run.sh:
  Log name of running test
mysql-test/r/rpl_sporadic_master.result:
  Cleaned up test
mysql-test/t/rpl_sporadic_master.test:
  cleaned up test
sql/log.cc:
  Cleanup.
  Fixed bug in wait_for_update() that I had introduced.
sql/mini_client.cc:
  Indentation changes.
sql/mysql_priv.h:
  Changed option variables to my_bool.
sql/mysqld.cc:
  Changed option variables to my_bool.
  Removed not used LOCK_server_id
  Minor code cleanups.
sql/repl_failsafe.cc:
  Minor code cleanups
sql/slave.cc:
  Minor code cleanups.
  Fixed usage of wait_for_update().
sql/slave.h:
  Changed option variables to my_bool.
sql/sql_class.cc:
  Added new thread specific mutex LOCK_delete to be able to free LOCK_thread_count early
sql/sql_class.h:
  Added new thread specific mutex LOCK_delete to be able to free LOCK_thread_count early
sql/sql_insert.cc:
  Do broadcast after unlock()
sql/sql_parse.cc:
  Removed not needed LOCK
  Changed usage of LOCK_thread_count -> LOCK_status for statistics variables
  Changed killing of threads to not lock LOCK_thread_count for long.
sql/sql_repl.cc:
  Changed options variables to my_bool
  Fixed usage of wait_for_update()
  Fixed loop to kill slaves to not lock LOCK_thread_count for long.
  Code optimization.
sql/sql_repl.h:
  bool -> my_bool
  Fixed KICK_SLAVE to use LOCK_delete

libmysqld/lib_sql.cc

@@ -384,7 +384,6 @@ int STDCALL mysql_server_init(int argc, char **argv, char **groups)
   (void) pthread_mutex_init(&LOCK_bytes_sent,MY_MUTEX_INIT_FAST);
   (void) pthread_mutex_init(&LOCK_bytes_received,MY_MUTEX_INIT_FAST);
   (void) pthread_mutex_init(&LOCK_timezone,MY_MUTEX_INIT_FAST);
-  (void) pthread_mutex_init(&LOCK_server_id, MY_MUTEX_INIT_FAST);
   (void) pthread_mutex_init(&LOCK_user_conn, MY_MUTEX_INIT_FAST);
   (void) pthread_mutex_init(&LOCK_rpl_status, MY_MUTEX_INIT_FAST);
   (void) pthread_mutex_init(&LOCK_active_mi, MY_MUTEX_INIT_FAST);

mysql-test/mysql-test-run.sh

@@ -343,6 +343,7 @@ SLAVE_MYPID="$MYRUN_DIR/slave.pid"
 SLAVE_MYLOG="$MYSQL_TEST_DIR/var/log/slave.log"
 SLAVE_MYERR="$MYSQL_TEST_DIR/var/log/slave.err"
 
+CURRENT_TEST="$MYSQL_TEST_DIR/var/log/current_test"
 SMALL_SERVER="-O key_buffer_size=1M -O sort_buffer=256K -O max_heap_table_size=1M"
 
 export MASTER_MYPORT
@@ -1034,6 +1035,7 @@ run_testcase ()
  master_init_script=$TESTDIR/$tname-master.sh
  slave_init_script=$TESTDIR/$tname-slave.sh
  slave_master_info_file=$TESTDIR/$tname-slave-master-info.opt
+ echo $tname > $CURRENT_TEST
  SKIP_SLAVE=`$EXPR \( $tname : rpl \) = 0`
  if [ $USE_MANAGER = 1 ] ; then
   many_slaves=`$EXPR \( $tname : rpl_failsafe \) != 0`

mysql-test/r/rpl_sporadic_master.result

@@ -4,7 +4,6 @@ reset master;
 reset slave;
 drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9;
 slave start;
-drop table if exists t1,t2;
 create table t2(n int);
 create table t1(n int not null auto_increment primary key);
 insert into t1 values (NULL),(NULL);

mysql-test/t/rpl_sporadic_master.test

@@ -2,7 +2,6 @@
 # COM_BINLOG_DUMP and additionally limits the number of events per dump
 
 source include/master-slave.inc;
-drop table if exists t1,t2;
 
 create table t2(n int);
 create table t1(n int not null auto_increment primary key);

sql/log.cc

@@ -810,12 +810,8 @@ void MYSQL_LOG::new_file(bool need_lock)
     if (log_type == LOG_BIN)
     {
       if (generate_new_name(new_name, name))
-      {
-	/* Error;  Continue using old log file */
-	if (need_lock)
-	  VOID(pthread_mutex_unlock(&LOCK_log));
-	return;					// Something went wrong
-      }
+	goto end;	/* Error;  Continue using old log file */
+
       new_name_ptr=new_name;
       if (!no_auto_events)
       {
@@ -853,6 +849,7 @@ void MYSQL_LOG::new_file(bool need_lock)
        no_auto_events);
   my_free(old_name,MYF(0));
 
+end:
   if (need_lock)
   {
     pthread_mutex_unlock(&LOCK_index);
@@ -1358,14 +1355,22 @@ bool MYSQL_LOG::write(THD *thd,const char *query, uint query_length,
 
   NOTES
     One must have a lock on LOCK_log before calling this function.
+    This lock will be freed before return!
+
+    The reason for the above is that for enter_cond() / exit_cond() to
+    work the mutex must be got before enter_cond() but releases before
+    exit_cond().
+    If you don't do it this way, you will get a deadlock in THD::awake()
 */
 
 
 void MYSQL_LOG:: wait_for_update(THD* thd)
 {
+  safe_mutex_assert_owner(&LOCK_log);
   const char* old_msg = thd->enter_cond(&update_cond, &LOCK_log,
 					"Slave: waiting for binlog update");
   pthread_cond_wait(&update_cond, &LOCK_log);
+  pthread_mutex_unlock(&LOCK_log);		// See NOTES
   thd->exit_cond(old_msg);
 }
 

sql/mini_client.cc

@@ -671,7 +671,7 @@ mc_mysql_connect(MYSQL *mysql,const char *host, const char *user,
   if ((pkt_length=mc_net_safe_read(mysql)) == packet_error)
     goto error;
 
-  /* Check if version of protocoll matches current one */
+  /* Check if version of protocol matches current one */
 
   mysql->protocol_version= net->read_pos[0];
   DBUG_DUMP("packet",(char*) net->read_pos,10);

sql/mysql_priv.h

@@ -637,15 +637,16 @@ extern uint test_flags,select_errors,ha_open_options;
 extern uint protocol_version,dropping_tables;
 extern uint delay_key_write_options;
 extern bool opt_endinfo, using_udf_functions, locked_in_memory;
-extern bool opt_using_transactions, use_temp_pool, mysql_embedded;
+extern bool opt_using_transactions, mysql_embedded;
 extern bool using_update_log, opt_large_files;
 extern bool opt_log, opt_update_log, opt_bin_log, opt_slow_log;
-extern bool opt_sql_bin_update, opt_safe_user_create, opt_no_mix_types;
-extern bool opt_disable_networking, opt_skip_show_db, opt_enable_named_pipe;
+extern bool opt_disable_networking, opt_skip_show_db;
 extern bool volatile abort_loop, shutdown_in_progress, grant_option;
 extern uint volatile thread_count, thread_running, global_read_lock;
+extern my_bool opt_sql_bin_update, opt_safe_user_create, opt_no_mix_types;
 extern my_bool opt_safe_show_db, opt_local_infile, lower_case_table_names;
-extern my_bool opt_slave_compressed_protocol;
+extern my_bool opt_slave_compressed_protocol, use_temp_pool;
+extern my_bool opt_enable_named_pipe;
 extern char f_fyllchar;
 
 extern MYSQL_LOG mysql_log,mysql_update_log,mysql_slow_log,mysql_bin_log;
@@ -656,7 +657,7 @@ extern pthread_mutex_t LOCK_mysql_create_db,LOCK_Acl,LOCK_open,
        LOCK_thread_count,LOCK_mapped_file,LOCK_user_locks, LOCK_status,
        LOCK_grant, LOCK_error_log, LOCK_delayed_insert,
        LOCK_delayed_status, LOCK_delayed_create, LOCK_crypt, LOCK_timezone,
-       LOCK_server_id, LOCK_slave_list, LOCK_active_mi, LOCK_manager,
+       LOCK_slave_list, LOCK_active_mi, LOCK_manager,
        LOCK_global_system_variables;
 extern pthread_cond_t COND_refresh, COND_thread_count, COND_manager;
 extern pthread_attr_t connection_attrib;

sql/mysqld.cc

@@ -246,18 +246,18 @@ bool opt_large_files= sizeof(my_off_t) > 4;
   Variables to store startup options
 */
 
-bool opt_skip_slave_start = 0; // If set, slave is not autostarted
+my_bool opt_skip_slave_start = 0; // If set, slave is not autostarted
 /*
   If set, some standard measures to enforce slave data integrity will not
   be performed
 */
-bool opt_reckless_slave = 0; 
+my_bool opt_reckless_slave = 0; 
 
 ulong back_log, connect_timeout, concurrency;
 char mysql_home[FN_REFLEN], pidfile_name[FN_REFLEN], time_zone[30];
 bool opt_log, opt_update_log, opt_bin_log, opt_slow_log;
 bool opt_disable_networking=0, opt_skip_show_db=0;
-bool opt_enable_named_pipe= 0;
+my_bool opt_enable_named_pipe= 0;
 my_bool opt_local_infile, opt_external_locking, opt_slave_compressed_protocol;
 uint delay_key_write_options= (uint) DELAY_KEY_WRITE_ON;
 
@@ -272,11 +272,12 @@ static my_string opt_logname=0,opt_update_logname=0,
 static char* mysql_home_ptr= mysql_home;
 static char* pidfile_name_ptr= pidfile_name;
 static pthread_t select_thread;
-static bool opt_noacl, opt_bootstrap=0, opt_myisam_log=0;
-bool opt_sql_bin_update = 0, opt_log_slave_updates = 0;
-bool opt_safe_user_create = 0, opt_no_mix_types = 0;
+static my_bool opt_noacl=0, opt_bootstrap=0, opt_myisam_log=0;
+my_bool opt_safe_user_create = 0, opt_no_mix_types = 0;
 my_bool opt_safe_show_db=0, lower_case_table_names, opt_old_rpl_compat;
-my_bool opt_show_slave_auth_info;
+my_bool opt_show_slave_auth_info, opt_sql_bin_update = 0;
+my_bool opt_log_slave_updates= 0;
+
 volatile bool  mqh_used = 0;
 FILE *bootstrap_file=0;
 int segfaulted = 0; // ensure we do not enter SIGSEGV handler twice
@@ -408,7 +409,7 @@ TYPELIB sql_mode_typelib= {array_elements(sql_mode_names)-1,"",
 			   sql_mode_names};
 
 MY_BITMAP temp_pool;
-bool use_temp_pool=0;
+my_bool use_temp_pool=0;
 
 pthread_key(MEM_ROOT*,THR_MALLOC);
 pthread_key(THD*, THR_THD);
@@ -418,7 +419,7 @@ pthread_mutex_t LOCK_mysql_create_db, LOCK_Acl, LOCK_open, LOCK_thread_count,
 		LOCK_error_log,
 		LOCK_delayed_insert, LOCK_delayed_status, LOCK_delayed_create,
 		LOCK_crypt, LOCK_bytes_sent, LOCK_bytes_received,
-	        LOCK_server_id, LOCK_global_system_variables,
+	        LOCK_global_system_variables,
 		LOCK_user_conn, LOCK_slave_list, LOCK_active_mi;
 
 pthread_cond_t COND_refresh,COND_thread_count, COND_slave_stopped,
@@ -1553,10 +1554,16 @@ static void *signal_hand(void *arg __attribute__((unused)))
   }
 #endif /* HAVE_STACK_TRACE_ON_SEGV */
 
-  // signal to start_signal_handler that we are ready
+  /*
+    signal to start_signal_handler that we are ready
+    This works by waiting for start_signal_handler to free mutex,
+    after which we signal it that we are ready.
+    At this pointer there is no other threads running, so there
+    should not be any other pthread_cond_signal() calls.
+  */
   (void) pthread_mutex_lock(&LOCK_thread_count);
-  (void) pthread_cond_signal(&COND_thread_count);
   (void) pthread_mutex_unlock(&LOCK_thread_count);
+  (void) pthread_cond_broadcast(&COND_thread_count);
 
   (void) pthread_sigmask(SIG_BLOCK,&set,NULL);
   for (;;)
@@ -1860,7 +1867,6 @@ int main(int argc, char **argv)
   (void) pthread_mutex_init(&LOCK_bytes_sent,MY_MUTEX_INIT_FAST);
   (void) pthread_mutex_init(&LOCK_bytes_received,MY_MUTEX_INIT_FAST);
   (void) pthread_mutex_init(&LOCK_timezone,MY_MUTEX_INIT_FAST);
-  (void) pthread_mutex_init(&LOCK_server_id, MY_MUTEX_INIT_FAST);
   (void) pthread_mutex_init(&LOCK_user_conn, MY_MUTEX_INIT_FAST);
   (void) pthread_mutex_init(&LOCK_rpl_status, MY_MUTEX_INIT_FAST);
   (void) pthread_mutex_init(&LOCK_active_mi, MY_MUTEX_INIT_FAST);
@@ -2170,10 +2176,8 @@ The server will not act as a slave.");
 	}
       }
       while (handler_count > 0)
-      {
 	pthread_cond_wait(&COND_handler_count,&LOCK_thread_count);
     }
-    }
     pthread_mutex_unlock(&LOCK_thread_count);
   }
 #else
@@ -2194,8 +2198,8 @@ The server will not act as a slave.");
   (void) pthread_mutex_lock(&LOCK_thread_count);
   DBUG_PRINT("quit", ("Got thread_count mutex"));
   select_thread_in_use=0;			// For close_connections
-  (void) pthread_cond_broadcast(&COND_thread_count);
   (void) pthread_mutex_unlock(&LOCK_thread_count);
+  (void) pthread_cond_broadcast(&COND_thread_count);
 #ifdef EXTRA_DEBUG2
   sql_print_error("After lock_thread_count");
 #endif
@@ -2204,9 +2208,7 @@ The server will not act as a slave.");
   /* Wait until cleanup is done */
   (void) pthread_mutex_lock(&LOCK_thread_count);
   while (!ready_to_exit)
-  {
     pthread_cond_wait(&COND_thread_count,&LOCK_thread_count);
-  }
   (void) pthread_mutex_unlock(&LOCK_thread_count);
 
 #if defined(__WIN__) && !defined(EMBEDDED_LIBRARY)
@@ -2794,8 +2796,8 @@ pthread_handler_decl(handle_connections_namedpipes,arg)
 
   pthread_mutex_lock(&LOCK_thread_count);
   handler_count--;
-  pthread_cond_signal(&COND_handler_count);
   pthread_mutex_unlock(&LOCK_thread_count);
+  pthread_cond_signal(&COND_handler_count);
   DBUG_RETURN(0);
 }
 #endif /* __NT__ */
@@ -3144,25 +3146,23 @@ struct my_option my_long_options[] =
    "Syntax: myisam-recover[=option[,option...]], where option can be DEFAULT, BACKUP or FORCE.",
    (gptr*) &myisam_recover_options_str, (gptr*) &myisam_recover_options_str, 0,
    GET_STR, OPT_ARG, 0, 0, 0, 0, 0, 0},
-  /*
-    Option needs to be available for the test case to pass in non-debugging
-    mode. is a no-op.
-  */
   {"memlock", OPT_MEMLOCK, "Lock mysqld in memory", (gptr*) &locked_in_memory,
    (gptr*) &locked_in_memory, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
   {"disconnect-slave-event-count", OPT_DISCONNECT_SLAVE_EVENT_COUNT,
-   "Undocumented: Meant for debugging and testing of replication",
+   "Option used by mysql-test for debugging and testing of replication",
    (gptr*) &disconnect_slave_event_count,
    (gptr*) &disconnect_slave_event_count, 0, GET_INT, REQUIRED_ARG, 0, 0, 0,
    0, 0, 0},
   {"abort-slave-event-count", OPT_ABORT_SLAVE_EVENT_COUNT,
-   "Undocumented: Meant for debugging and testing of replication",
+   "Option used by mysql-test for debugging and testing of replication",
    (gptr*) &abort_slave_event_count,  (gptr*) &abort_slave_event_count,
    0, GET_INT, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
-  {"max-binlog-dump-events", OPT_MAX_BINLOG_DUMP_EVENTS, "Undocumented",
+  {"max-binlog-dump-events", OPT_MAX_BINLOG_DUMP_EVENTS,
+   "Option used by mysql-test for debugging and testing of replication",
    (gptr*) &max_binlog_dump_events, (gptr*) &max_binlog_dump_events, 0,
    GET_INT, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
-  {"sporadic-binlog-dump-fail", OPT_SPORADIC_BINLOG_DUMP_FAIL, "Undocumented",
+  {"sporadic-binlog-dump-fail", OPT_SPORADIC_BINLOG_DUMP_FAIL,
+   "Option used by mysql-test for debugging and testing of replication",
    (gptr*) &opt_sporadic_binlog_dump_fail,
    (gptr*) &opt_sporadic_binlog_dump_fail, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0,
    0},
@@ -3176,7 +3176,7 @@ struct my_option my_long_options[] =
    (gptr*) &opt_no_mix_types, (gptr*) &opt_no_mix_types, 0, GET_BOOL, NO_ARG,
    0, 0, 0, 0, 0, 0},
 #endif
-  {"old-protocol", 'o', "Use the old (3.20) protocol",
+  {"old-protocol", 'o', "Use the old (3.20) protocol client/server protocol",
    (gptr*) &protocol_version, (gptr*) &protocol_version, 0, GET_UINT, NO_ARG,
    PROTOCOL_VERSION, 0, 0, 0, 0, 0},
   {"old-rpl-compat", OPT_OLD_RPL_COMPAT,

sql/repl_failsafe.cc

@@ -276,9 +276,7 @@ int translate_master(THD* thd, LEX_MASTER_INFO* mi, char* errmsg)
     return 1;
   }
 
-  linfo.index_file_offset = 0;
-
-  if (mysql_bin_log.find_log_pos(&linfo, NullS))
+  if (mysql_bin_log.find_log_pos(&linfo, NullS, 1))
   {
     strmov(errmsg,"Could not find first log");
     return 1;
@@ -332,7 +330,7 @@ int translate_master(THD* thd, LEX_MASTER_INFO* mi, char* errmsg)
     strmov(last_log_name, linfo.log_file_name);
     last_pos = my_b_tell(&log);
 
-    switch (mysql_bin_log.find_next_log(&linfo)) {
+    switch (mysql_bin_log.find_next_log(&linfo, 1)) {
     case LOG_INFO_EOF:
       if (last_file >= 0)
        (void)my_close(last_file, MYF(MY_WME));

sql/slave.cc

@@ -230,7 +230,7 @@ int init_relay_log_pos(RELAY_LOG_INFO* rli,const char* log,
     Test to see if the previous run was with the skip of purging
     If yes, we do not purge when we restart
   */
-  if (rli->relay_log.find_log_pos(&rli->linfo,NullS))
+  if (rli->relay_log.find_log_pos(&rli->linfo, NullS, 1))
   {
     *errmsg="Could not find first log during relay log initialization";
     goto err;
@@ -240,7 +240,7 @@ int init_relay_log_pos(RELAY_LOG_INFO* rli,const char* log,
   {
     if (strcmp(log, rli->linfo.log_file_name))
       rli->skip_log_purge=1;			// Different name; Don't purge
-    if (rli->relay_log.find_log_pos(&rli->linfo, log))
+    if (rli->relay_log.find_log_pos(&rli->linfo, log, 1))
     {
       *errmsg="Could not find target log during relay log initialization";
       goto err;
@@ -1201,7 +1201,7 @@ static int count_relay_log_space(RELAY_LOG_INFO* rli)
   LOG_INFO linfo;
   DBUG_ENTER("count_relay_log_space");
   rli->log_space_total = 0;
-  if (rli->relay_log.find_log_pos(&linfo, NullS))
+  if (rli->relay_log.find_log_pos(&linfo, NullS, 1))
   {
     sql_print_error("Could not find first log while counting relay log space");
     DBUG_RETURN(1);
@@ -1210,7 +1210,7 @@ static int count_relay_log_space(RELAY_LOG_INFO* rli)
   {
     if (add_relay_log(rli,&linfo))
       DBUG_RETURN(1);
-  } while (!rli->relay_log.find_next_log(&linfo));
+  } while (!rli->relay_log.find_next_log(&linfo, 1));
   DBUG_RETURN(0);
 }
 
@@ -2538,9 +2538,10 @@ static int connect_to_master(THD* thd, MYSQL* mysql, MASTER_INFO* mi,
     {
       last_errno=mc_mysql_errno(mysql);
       suppress_warnings= 0;
-      sql_print_error("Slave I/O thread: error connecting to master \
+      sql_print_error("Slave I/O thread: error %s to master \
 '%s@%s:%d': \
 Error: '%s'  errno: %d  retry-time: %d  retries: %d",
+		      (reconnect ? "reconnecting" : "connecting"),
 		      mi->user,mi->host,mi->port,
 		      mc_mysql_error(mysql), last_errno,
 		      mi->connect_retry,
@@ -2771,8 +2772,8 @@ Log_event* next_event(RELAY_LOG_INFO* rli)
 	  update. If we do not, show slave status will block
 	*/
 	pthread_mutex_unlock(&rli->data_lock);
+ 	/* Note that wait_for_update unlocks lock_log ! */
 	rli->relay_log.wait_for_update(rli->sql_thd);
-	pthread_mutex_unlock(log_lock);
 	
 	// re-acquire data lock since we released it earlier
 	pthread_mutex_lock(&rli->data_lock);

sql/slave.h

@@ -30,7 +30,8 @@ extern bool use_slave_mask;
 extern char* slave_load_tmpdir;
 extern my_string master_info_file,relay_log_info_file;
 extern my_string opt_relay_logname, opt_relaylog_index_name;
-extern bool opt_skip_slave_start, opt_reckless_slave;
+extern my_bool opt_skip_slave_start, opt_reckless_slave;
+extern my_bool opt_log_slave_updates;
 extern ulong relay_log_space_limit;
 struct st_master_info;
 
@@ -408,7 +409,6 @@ int init_relay_log_pos(RELAY_LOG_INFO* rli,const char* log,ulonglong pos,
 int purge_relay_logs(RELAY_LOG_INFO* rli, THD *thd, bool just_reset,
 		     const char** errmsg);
 
-extern bool opt_log_slave_updates ;
 pthread_handler_decl(handle_slave_io,arg);
 pthread_handler_decl(handle_slave_sql,arg);
 extern bool volatile abort_loop;

sql/sql_class.cc

@@ -116,8 +116,8 @@ THD::THD():user_time(0),fatal_error(0),last_insert_id_used(0),
 #endif
 #ifdef SIGNAL_WITH_VIO_CLOSE
   active_vio = 0;
-  pthread_mutex_init(&active_vio_lock, MY_MUTEX_INIT_FAST);
 #endif  
+  pthread_mutex_init(&LOCK_delete, MY_MUTEX_INIT_FAST);
 
   /* Variables with default values */
   proc_info="login";
@@ -189,6 +189,10 @@ THD::~THD()
 {
   THD_CHECK_SENTRY(this);
   DBUG_ENTER("~THD()");
+  /* Ensure that no one is using THD */
+  pthread_mutex_lock(&LOCK_delete);
+  pthread_mutex_unlock(&LOCK_delete);
+
   /* Close connection */
   if (net.vio)
   {
@@ -217,18 +221,19 @@ THD::~THD()
   free_root(&mem_root,MYF(0));
   free_root(&transaction.mem_root,MYF(0));
   mysys_var=0;					// Safety (shouldn't be needed)
-#ifdef SIGNAL_WITH_VIO_CLOSE
-  pthread_mutex_destroy(&active_vio_lock);
-#endif
+  pthread_mutex_destroy(&LOCK_delete);
 #ifndef DBUG_OFF
   dbug_sentry = THD_SENTRY_GONE;
 #endif  
   DBUG_VOID_RETURN;
 }
 
+
 void THD::awake(bool prepare_to_die)
 {
   THD_CHECK_SENTRY(this);
+  safe_mutex_assert_owner(&LOCK_delete); 
+
   if (prepare_to_die)
     killed = 1;
   thr_alarm_kill(real_id);

sql/sql_class.h

@@ -141,8 +141,8 @@ class MYSQL_LOG {
 
   // iterating through the log index file
   int find_log_pos(LOG_INFO* linfo, const char* log_name,
-		   bool need_mutex=1);
-  int find_next_log(LOG_INFO* linfo, bool need_mutex=1);
+		   bool need_mutex);
+  int find_next_log(LOG_INFO* linfo, bool need_mutex);
   int get_current_log(LOG_INFO* linfo);
   uint next_file_id();
 
@@ -330,6 +330,7 @@ class THD :public ilink {
   struct  sockaddr_in remote;		// client socket address
   struct  rand_struct rand;		// used for authentication
   struct  system_variables variables;	// Changeable local variables
+  pthread_mutex_t LOCK_delete;		// Locked before thd is deleted
 
   char	  *query;			// Points to the current query,
   /*
@@ -410,7 +411,6 @@ class THD :public ilink {
 #endif
 #ifdef SIGNAL_WITH_VIO_CLOSE
   Vio* active_vio;
-  pthread_mutex_t active_vio_lock;
 #endif  
   ulonglong  next_insert_id,last_insert_id,current_insert_id,
              limit_found_rows;
@@ -465,25 +465,25 @@ class THD :public ilink {
 #ifdef SIGNAL_WITH_VIO_CLOSE
   inline void set_active_vio(Vio* vio)
   {
-    pthread_mutex_lock(&active_vio_lock);
+    pthread_mutex_lock(&LOCK_delete);
     active_vio = vio;
-    pthread_mutex_unlock(&active_vio_lock);
+    pthread_mutex_unlock(&LOCK_delete);
   }
   inline void clear_active_vio()
   {
-    pthread_mutex_lock(&active_vio_lock);
+    pthread_mutex_lock(&LOCK_delete);
     active_vio = 0;
-    pthread_mutex_unlock(&active_vio_lock);
+    pthread_mutex_unlock(&LOCK_delete);
   }
   inline void close_active_vio()
   {
-    pthread_mutex_lock(&active_vio_lock);
+    pthread_mutex_lock(&LOCK_delete);
     if (active_vio)
     {
       vio_close(active_vio);
       active_vio = 0;
     }
-    pthread_mutex_unlock(&active_vio_lock);
+    pthread_mutex_unlock(&LOCK_delete);
   }
 #endif  
   void awake(bool prepare_to_die);

sql/sql_insert.cc

@@ -562,8 +562,8 @@ class delayed_insert :public ilink {
     thd.user=thd.host=0;
     thread_count--;
     delayed_insert_threads--;
-    VOID(pthread_cond_broadcast(&COND_thread_count)); /* Tell main we are ready */
     VOID(pthread_mutex_unlock(&LOCK_thread_count));
+    VOID(pthread_cond_broadcast(&COND_thread_count)); /* Tell main we are ready */
   }
 
   /* The following is for checking when we can delete ourselves */

sql/sql_parse.cc

@@ -585,7 +585,7 @@ pthread_handler_decl(handle_one_connection,arg)
   if (!(test_flags & TEST_NO_THREADS) & my_thread_init())
   {
     close_connection(&thd->net,ER_OUT_OF_RESOURCES);
-    statistic_increment(aborted_connects,&LOCK_thread_count);
+    statistic_increment(aborted_connects,&LOCK_status);
     end_thread(thd,0);
     return 0;
   }
@@ -612,7 +612,7 @@ pthread_handler_decl(handle_one_connection,arg)
   if (thd->store_globals())
   {
     close_connection(&thd->net,ER_OUT_OF_RESOURCES);
-    statistic_increment(aborted_connects,&LOCK_thread_count);
+    statistic_increment(aborted_connects,&LOCK_status);
     end_thread(thd,0);
     return 0;
   }
@@ -634,7 +634,7 @@ pthread_handler_decl(handle_one_connection,arg)
       if (vio_type(net->vio) == VIO_TYPE_NAMEDPIPE)
 	sleep(1);				/* must wait after eof() */
 #endif
-      statistic_increment(aborted_connects,&LOCK_thread_count);
+      statistic_increment(aborted_connects,&LOCK_status);
       goto end_thread;
     }
 
@@ -668,7 +668,7 @@ pthread_handler_decl(handle_one_connection,arg)
 			(net->last_errno ? ER(net->last_errno) :
 			 ER(ER_UNKNOWN_ERROR)));
       send_error(net,net->last_errno,NullS);
-      thread_safe_increment(aborted_threads,&LOCK_thread_count);
+      thread_safe_increment(aborted_threads,&LOCK_status);
     }
     
 end_thread:
@@ -757,8 +757,8 @@ pthread_handler_decl(handle_bootstrap,arg)
 end:
   (void) pthread_mutex_lock(&LOCK_thread_count);
   thread_count--;
-  (void) pthread_cond_broadcast(&COND_thread_count);
   (void) pthread_mutex_unlock(&LOCK_thread_count);
+  (void) pthread_cond_broadcast(&COND_thread_count);
   my_thread_end();
   pthread_exit(0);
   DBUG_RETURN(0);				// Never reached
@@ -883,7 +883,7 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
   thd->lex.select_lex.options=0;		// We store status here
   switch (command) {
   case COM_INIT_DB:
-    thread_safe_increment(com_stat[SQLCOM_CHANGE_DB],&LOCK_thread_count);
+    thread_safe_increment(com_stat[SQLCOM_CHANGE_DB],&LOCK_status);
     if (!mysql_change_db(thd,packet))
       mysql_log.write(thd,command,"%s",thd->db);
     break;
@@ -895,7 +895,7 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
   }
   case COM_TABLE_DUMP:
     {
-      thread_safe_increment(com_other,&LOCK_thread_count);
+      thread_safe_increment(com_other, &LOCK_status);
       slow_command = TRUE;
       uint db_len = *(uchar*)packet;
       uint tbl_len = *(uchar*)(packet + db_len + 1);
@@ -912,7 +912,7 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
     }
   case COM_CHANGE_USER:
   {
-    thread_safe_increment(com_other,&LOCK_thread_count);
+    thread_safe_increment(com_other,&LOCK_status);
     char *user=   (char*) packet;
     char *passwd= strend(user)+1;
     char *db=     strend(passwd)+1;
@@ -992,7 +992,7 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
   {
     char *fields;
     TABLE_LIST table_list;
-    thread_safe_increment(com_stat[SQLCOM_SHOW_FIELDS],&LOCK_thread_count);
+    thread_safe_increment(com_stat[SQLCOM_SHOW_FIELDS],&LOCK_status);
     bzero((char*) &table_list,sizeof(table_list));
     if (!(table_list.db=thd->db))
     {
@@ -1027,7 +1027,7 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
 
   case COM_CREATE_DB:				// QQ: To be removed
     {
-      thread_safe_increment(com_stat[SQLCOM_CREATE_DB],&LOCK_thread_count);
+      thread_safe_increment(com_stat[SQLCOM_CREATE_DB],&LOCK_status);
       char *db=thd->strdup(packet);
       // null test to handle EOM
       if (!db || !strip_sp(db) || check_db_name(db))
@@ -1045,7 +1045,7 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
     }
   case COM_DROP_DB:				// QQ: To be removed
     {
-      thread_safe_increment(com_stat[SQLCOM_DROP_DB],&LOCK_thread_count);
+      thread_safe_increment(com_stat[SQLCOM_DROP_DB],&LOCK_status);
       char *db=thd->strdup(packet);
       // null test to handle EOM
       if (!db || !strip_sp(db) || check_db_name(db))
@@ -1066,7 +1066,7 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
     }
   case COM_BINLOG_DUMP:
     {
-      thread_safe_increment(com_other,&LOCK_thread_count);
+      thread_safe_increment(com_other,&LOCK_status);
       slow_command = TRUE;
       if (check_global_access(thd, REPL_SLAVE_ACL))
 	break;
@@ -1078,11 +1078,9 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
       /* TODO: The following has to be changed to an 8 byte integer */
       pos = uint4korr(packet);
       flags = uint2korr(packet + 4);
-      pthread_mutex_lock(&LOCK_server_id);
       thd->server_id=0; /* avoid suicide */
       kill_zombie_dump_threads(slave_server_id = uint4korr(packet+6));
       thd->server_id = slave_server_id;
-      pthread_mutex_unlock(&LOCK_server_id);
       mysql_binlog_send(thd, thd->strdup(packet + 10), (my_off_t) pos, flags);
       unregister_slave(thd,1,1);
       // fake COM_QUIT -- if we get here, the thread needs to terminate
@@ -1092,7 +1090,7 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
     }
   case COM_REFRESH:
     {
-      thread_safe_increment(com_stat[SQLCOM_FLUSH],&LOCK_thread_count);
+      thread_safe_increment(com_stat[SQLCOM_FLUSH],&LOCK_status);
       ulong options= (ulong) (uchar) packet[0];
       if (check_global_access(thd,RELOAD_ACL))
 	break;
@@ -1104,7 +1102,7 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
       break;
     }
   case COM_SHUTDOWN:
-    thread_safe_increment(com_other,&LOCK_thread_count);
+    thread_safe_increment(com_other,&LOCK_status);
     if (check_global_access(thd,SHUTDOWN_ACL))
       break; /* purecov: inspected */
     DBUG_PRINT("quit",("Got shutdown command"));
@@ -1127,7 +1125,7 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
   case COM_STATISTICS:
   {
     mysql_log.write(thd,command,NullS);
-    thread_safe_increment(com_stat[SQLCOM_SHOW_STATUS],&LOCK_thread_count);
+    thread_safe_increment(com_stat[SQLCOM_SHOW_STATUS],&LOCK_status);
     char buff[200];
     ulong uptime = (ulong) (thd->start_time - start_time);
     sprintf((char*) buff,
@@ -1146,11 +1144,11 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
     break;
   }
   case COM_PING:
-    thread_safe_increment(com_other,&LOCK_thread_count);
+    thread_safe_increment(com_other,&LOCK_status);
     send_ok(net);				// Tell client we are alive
     break;
   case COM_PROCESS_INFO:
-    thread_safe_increment(com_stat[SQLCOM_SHOW_PROCESSLIST],&LOCK_thread_count);
+    thread_safe_increment(com_stat[SQLCOM_SHOW_PROCESSLIST],&LOCK_status);
     if (!thd->priv_user[0] && check_global_access(thd,PROCESS_ACL))
       break;
     mysql_log.write(thd,command,NullS);
@@ -1159,13 +1157,13 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
     break;
   case COM_PROCESS_KILL:
   {
-    thread_safe_increment(com_stat[SQLCOM_KILL],&LOCK_thread_count);
+    thread_safe_increment(com_stat[SQLCOM_KILL],&LOCK_status);
     ulong id=(ulong) uint4korr(packet);
     kill_one_thread(thd,id);
     break;
   }
   case COM_DEBUG:
-    thread_safe_increment(com_other,&LOCK_thread_count);
+    thread_safe_increment(com_other,&LOCK_status);
     if (check_global_access(thd, SUPER_ACL))
       break;					/* purecov: inspected */
     mysql_print_status(thd);
@@ -1265,7 +1263,7 @@ mysql_execute_command(void)
        !tables_ok(thd,tables)))
     DBUG_VOID_RETURN;
 
-  thread_safe_increment(com_stat[lex->sql_command],&LOCK_thread_count);
+  thread_safe_increment(com_stat[lex->sql_command],&LOCK_status);
   switch (lex->sql_command) {
   case SQLCOM_SELECT:
   {
@@ -3393,15 +3391,34 @@ bool reload_acl_and_cache(THD *thd, ulong options, TABLE_LIST *tables)
 }
 
 
+/*
+  kill on thread
+
+  SYNOPSIS
+    kill_one_thread()
+    thd			Thread class
+    id			Thread id
+
+  NOTES
+    This is written such that we have a short lock on LOCK_thread_count
+*/
+
 void kill_one_thread(THD *thd, ulong id)
 {
-  VOID(pthread_mutex_lock(&LOCK_thread_count)); // For unlink from list
-  I_List_iterator<THD> it(threads);
   THD *tmp;
   uint error=ER_NO_SUCH_THREAD;
+  VOID(pthread_mutex_lock(&LOCK_thread_count)); // For unlink from list
+  I_List_iterator<THD> it(threads);
   while ((tmp=it++))
   {
     if (tmp->thread_id == id)
+    {
+      pthread_mutex_lock(&tmp->LOCK_delete);	// Lock from delete
+      break;
+    }
+  }
+  VOID(pthread_mutex_unlock(&LOCK_thread_count));
+  if (tmp)
   {
     if ((thd->master_access & SUPER_ACL) ||
 	!strcmp(thd->user,tmp->user))
@@ -3411,10 +3428,9 @@ void kill_one_thread(THD *thd, ulong id)
     }
     else
       error=ER_KILL_DENIED_ERROR;
-      break;					// Found thread
-    }
+    pthread_mutex_unlock(&tmp->LOCK_delete);
   }
-  VOID(pthread_mutex_unlock(&LOCK_thread_count));
+
   if (!error)
     send_ok(&thd->net);
   else

sql/sql_repl.cc

@@ -27,7 +27,7 @@
 extern const char* any_db;
 
 int max_binlog_dump_events = 0; // unlimited
-bool opt_sporadic_binlog_dump_fail = 0;
+my_bool opt_sporadic_binlog_dump_fail = 0;
 static int binlog_dump_count = 0;
 
 int check_binlog_magic(IO_CACHE* log, const char** errmsg)
@@ -247,7 +247,8 @@ bool log_in_use(const char* log_name)
       pthread_mutex_lock(&linfo->lock);
       result = !memcmp(log_name, linfo->log_file_name, log_name_len);
       pthread_mutex_unlock(&linfo->lock);
-      if (result) break;
+      if (result)
+	break;
     }
   }
 
@@ -346,7 +347,7 @@ void mysql_binlog_send(THD* thd, char* log_ident, my_off_t pos,
   linfo.index_file_offset = 0;
   thd->current_linfo = &linfo;
 
-  if (mysql_bin_log.find_log_pos(&linfo, name))
+  if (mysql_bin_log.find_log_pos(&linfo, name, 1))
   {
     errmsg = "Could not find first log file name in binary log index file";
     my_errno= ER_MASTER_FATAL_ERROR_READING_BINLOG;
@@ -496,21 +497,27 @@ Increase max_allowed_packet on master";
 	switch (Log_event::read_log_event(&log, packet, (pthread_mutex_t*)0)) {
 	case 0:
 	  /* we read successfully, so we'll need to send it to the slave */
+	  pthread_mutex_unlock(log_lock);
 	  read_packet = 1;
 	  break;
 
 	case LOG_READ_EOF:
 	  DBUG_PRINT("wait",("waiting for data in binary log"));
 	  if (!thd->killed)
+	  {
+	    /* Note that the following call unlocks lock_log */
 	    mysql_bin_log.wait_for_update(thd);
+	  }
+	  else
+	    pthread_mutex_unlock(log_lock);
 	  DBUG_PRINT("wait",("binary log received update"));
 	  break;
 
 	default:
+	  pthread_mutex_unlock(log_lock);
 	  fatal_error = 1;
 	  break;
 	}
-	pthread_mutex_unlock(log_lock);
 
 	if (read_packet)
 	{
@@ -552,7 +559,7 @@ Increase max_allowed_packet on master";
       bool loop_breaker = 0;
       // need this to break out of the for loop from switch
       thd->proc_info = "switching to next log";
-      switch (mysql_bin_log.find_next_log(&linfo)) {
+      switch (mysql_bin_log.find_next_log(&linfo, 1)) {
       case LOG_INFO_EOF:
 	loop_breaker = (flags & BINLOG_DUMP_NON_BLOCK);
 	break;
@@ -738,18 +745,22 @@ void kill_zombie_dump_threads(uint32 slave_server_id)
   {
     if (tmp->command == COM_BINLOG_DUMP &&
        tmp->server_id == slave_server_id)
+    {
+      pthread_mutex_lock(&tmp->LOCK_delete);	// Lock from delete
+      break;
+    }
+  }
+  pthread_mutex_unlock(&LOCK_thread_count);
+  if (tmp)
   {
     /*
       Here we do not call kill_one_thread() as
       it will be slow because it will iterate through the list
-	again. Plus it double-locks LOCK_tread_count, which
-	make safe_mutex complain and abort.
-	We just to do kill the thread ourselves.
+      again. We just to do kill the thread ourselves.
     */
     tmp->awake(1/*prepare to die*/);
+    pthread_mutex_unlock(&tmp->LOCK_delete);
   }
-  }
-  pthread_mutex_unlock(&LOCK_thread_count);
 }
 
 
@@ -927,6 +938,7 @@ int show_binlog_events(THD* thd)
     my_off_t pos = lex_mi->pos;
     char search_file_name[FN_REFLEN], *name;
     const char *log_file_name = lex_mi->log_file_name;
+    pthread_mutex_t *log_lock = mysql_bin_log.get_log_lock();
     LOG_INFO linfo;
     Log_event* ev;
   
@@ -942,7 +954,7 @@ int show_binlog_events(THD* thd)
     linfo.index_file_offset = 0;
     thd->current_linfo = &linfo;
 
-    if (mysql_bin_log.find_log_pos(&linfo, name))
+    if (mysql_bin_log.find_log_pos(&linfo, name, 1))
     {
       errmsg = "Could not find target log";
       goto err;
@@ -957,7 +969,7 @@ int show_binlog_events(THD* thd)
       goto err;
     }
 
-    pthread_mutex_lock(mysql_bin_log.get_log_lock());
+    pthread_mutex_lock(log_lock);
     my_b_seek(&log, pos);
 
     for (event_count = 0;
@@ -968,7 +980,7 @@ int show_binlog_events(THD* thd)
       {
 	errmsg = "Net error";
 	delete ev;
-	pthread_mutex_unlock(mysql_bin_log.get_log_lock());
+	pthread_mutex_unlock(log_lock);
 	goto err;
       }
 
@@ -982,11 +994,11 @@ int show_binlog_events(THD* thd)
     if (event_count < limit_end && log.error)
     {
       errmsg = "Wrong offset or I/O error";
-      pthread_mutex_unlock(mysql_bin_log.get_log_lock());
+      pthread_mutex_unlock(log_lock);
       goto err;
     }
 
-    pthread_mutex_unlock(mysql_bin_log.get_log_lock());
+    pthread_mutex_unlock(log_lock);
   }
 
 err:

sql/sql_repl.h

@@ -18,9 +18,9 @@ extern bool server_id_supplied;
 extern I_List<i_string> binlog_do_db, binlog_ignore_db;
 
 extern int max_binlog_dump_events;
-extern bool opt_sporadic_binlog_dump_fail;
+extern my_bool opt_sporadic_binlog_dump_fail;
 
-#define KICK_SLAVE(thd) thd->awake(0 /* do not prepare to die*/);
+#define KICK_SLAVE(thd) { pthread_mutex_lock(&(thd)->LOCK_delete); (thd)->awake(0 /* do not prepare to die*/); pthread_mutex_unlock(&(thd)->LOCK_delete); }
 
 File open_binlog(IO_CACHE *log, const char *log_file_name,
 		 const char **errmsg);