fixed memory leak in replication

fixed bugs in new IO_CACHE code so that the old calls work
fixed shutdown bug
clean-up of mysql-test-run


include/my_sys.h:
  fixes for IO_CACHE
mysql-test/mysql-test-run.sh:
  fixed missing \ bug
  added --skip-gdb-magic to skip Sergei's automatic mysql_parse break
  do not delete the breakpoint in command - it crashes gdb sometimes
mysys/mf_iocache2.c:
  rc_pos->write_pos in my_b_seek for WRITE_CACHE
sql/mysqld.cc:
  fixed shutdown bug when singals DO break read introduced by the fix for 
  when they don't.
sql/repl_failsafe.cc:
  fixed memory leak

include/my_sys.h

@@ -361,7 +361,6 @@ typedef int (*qsort2_cmp)(const void *, const void *, const void *);
    (*(info)->write_function)((info),(Buffer),(Count)))
  
 
-
 #define my_b_get(info) \
   ((info)->rc_pos != (info)->rc_end ?\
    ((info)->rc_pos++, (int) (uchar) (info)->rc_pos[-1]) :\
@@ -370,17 +369,23 @@ typedef int (*qsort2_cmp)(const void *, const void *, const void *);
 
 	/* my_b_write_byte dosn't have any err-check */
 #define my_b_write_byte(info,chr) \
-  (((info)->rc_pos < (info)->rc_end) ?\
-   ((*(info)->rc_pos++)=(chr)) :\
-   (_my_b_write(info,0,0) , ((*(info)->rc_pos++)=(chr))))
+  (((info)->write_pos < (info)->write_end) ?\
+   ((*(info)->write_pos++)=(chr)) :\
+   (_my_b_write(info,0,0) , ((*(info)->write_pos++)=(chr))))
 
 #define my_b_fill_cache(info) \
   (((info)->rc_end=(info)->rc_pos),(*(info)->read_function)(info,0,0))
 
+#define my_write_cache(info) (((info)->type == WRITE_CACHE))
+#define my_cache_pointer(info)  (my_write_cache(info) ? \
+               ((info)->write_pos) : ((info)->rc_pos))
+
 #define my_b_tell(info) ((info)->pos_in_file + \
-			 ((info)->rc_pos - (info)->rc_request_pos))
+			 my_cache_pointer(info) - (info)->rc_request_pos)
 
-#define my_b_bytes_in_cache(info) ((uint) ((info)->rc_end - (info)->rc_pos))
+#define my_b_bytes_in_cache(info) (my_write_cache(info) ? \
+ ((uint) ((info)->write_end - (info)->write_pos)): \
+ ((uint) ((info)->rc_end - (info)->rc_pos)))
 
 typedef struct st_changeable_var {
   const char *name;			/* Name of variable */

mysql-test/mysql-test-run.sh

@@ -177,6 +177,7 @@ while test $# -gt 0; do
     --skip-rpl) NO_SLAVE=1 ;;
     --skip-test=*) SKIP_TEST=`$ECHO "$1" | $SED -e "s;--skip-test=;;"`;;
     --do-test=*) DO_TEST=`$ECHO "$1" | $SED -e "s;--do-test=;;"`;;
+    --skip-gdb-magic) SKIP_GDB_MAGIC=1 ;;
     --wait-timeout=*)
      START_WAIT_TIMEOUT=`$ECHO "$1" | $SED -e "s;--wait-timeout=;;"`
      STOP_WAIT_TIMEOUT=$START_WAIT_TIMEOUT;;
@@ -654,7 +655,7 @@ start_master()
             --basedir=$MY_BASEDIR --init-rpl-role=master \
 	    --port=$MASTER_MYPORT \
 	    --exit-info=256 \
-	    --core
+	    --core \
             --datadir=$MASTER_MYDDIR \
 	    --pid-file=$MASTER_MYPID \
 	    --socket=$MASTER_MYSOCK \
@@ -694,13 +695,18 @@ start_master()
       "gdb -x $GDB_MASTER_INIT" $MYSQLD 
     elif [ x$DO_GDB = x1 ]
     then
-      $CAT <<__GDB_MASTER_INIT__  > $GDB_MASTER_INIT
+      ( echo set args $master_args;
+        if [ -z "$SKIP_GDB_MAGIC" ] ;
+	then
+	 cat <<EOF
 b mysql_parse
 commands 1
-dele 1
+echo If you do not want to break here anymore, type dele 1\n
+echo If you not want to break at all, use --skip-gdb-magic\n
 end
-r $master_args
-__GDB_MASTER_INIT__
+r
+EOF
+      fi )  > $GDB_MASTER_INIT     
       manager_launch master $XTERM -display $DISPLAY \
       -title "Master" -e gdb -x $GDB_MASTER_INIT $MYSQLD 
     else	    

mysys/mf_iocache2.c

@@ -38,10 +38,10 @@ void my_b_seek(IO_CACHE *info,my_off_t pos)
   }
   else if (info->type == WRITE_CACHE)
   {
-    byte* try_rc_pos;
-    try_rc_pos = info->rc_pos + (pos - info->pos_in_file);
-    if (try_rc_pos >= info->buffer && try_rc_pos <= info->rc_end)
-      info->rc_pos = try_rc_pos;
+    byte* try_write_pos;
+    try_write_pos = info->write_pos + (pos - info->pos_in_file);
+    if (try_write_pos >= info->buffer && try_write_pos <= info->write_end)
+      info->write_pos = try_write_pos;
     else
       flush_io_cache(info);
   }

sql/mysqld.cc

@@ -627,7 +627,9 @@ void kill_mysql(void)
 #endif
     DBUG_PRINT("quit",("After pthread_kill"));
     shutdown_in_progress=1;			// Safety if kill didn't work
+#ifdef SIGNALS_DONT_BREAK_READ    
     abort_loop=1;
+#endif    
     DBUG_VOID_RETURN;
 }
 

sql/repl_failsafe.cc

@@ -138,6 +138,7 @@ int update_slave_list(MYSQL* mysql)
 	goto err;
       }
       si->server_id = server_id;
+      hash_insert(&slave_list, (byte*)si);
     }
     strnmov(si->host, row[1], sizeof(si->host));
     si->port = atoi(row[port_ind]);