BUG#33247: mysqlbinlog does not clean up after itself on abnormal termination

Problem: mysqlbinlog does not free memory if an error happens.
Fix: binlog-processing functions do not call exit() anymore. Instead, they
print an error and return an error code. Error codes are propagated all
the way back to main, and all allocated memory is freed on the way.


client/mysqlbinlog.cc:
  - New error handling policy: functions processing binlogs don't just
    exit() anymore. Instead, they print a message and return an error
    status.
  - New policy for the global `mysql' and `glob_description_event': these
    are not passed as parameters anymore. The global pointer is used
    instead.
  - More error situations are detected and reported.
  - Better error messages: the program never terminates with exit status 1
    without explanation any more. Fixed spelling errors. Use consistent
    format of messages (a single line beginning with "ERROR: " or
    "WARNING: " and ending with "." is printed to stderr.)
  - New memory handling: memory is always freed on program termination.
  - Better comments: more functions are explained, doxygen is used, and
    more precise formulations in some existing comments.
mysql-test/suite/binlog/r/binlog_base64_flag.result:
  Result file updated since output format of mysqlbinlog changed while the
  test was disabled.
mysql-test/suite/binlog/t/binlog_killed.test:
  Mysqlbinlog now works as described when the binlog is open. Hence, the
  --force-if-open flag must be passed
mysql-test/suite/binlog/t/binlog_killed_simulate.test:
  Mysqlbinlog now works as described when the binlog is open. Hence, the
  --force-if-open flag must be passed
mysql-test/suite/binlog/t/disabled.def:
  Now that mysqlbinlog cleans up after itself on abnormal termination, we
  can enable this test again.

mysql-test/suite/binlog/r/binlog_base64_flag.result

@@ -40,8 +40,13 @@ SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=1, @@session.uniq
 SET @@session.sql_mode=0/*!*/;
 /*!\C latin1 *//*!*/;
 SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=8/*!*/;
-create table t1 (a int) engine= myisam/*!*/;
+create table t1 (a int) engine= myisam
+/*!*/;
 # at 203
+DELIMITER ;
+# End of log file
+ROLLBACK /* added by mysqlbinlog */;
+/*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/;
 ==== Test non-matching FD event and Row event ====
 BINLOG '
 4CdYRw8BAAAAYgAAAGYAAAAAAAQANS4xLjE1LW5kYi02LjEuMjQtZGVidWctbG9nAAAAAAAAAAAA

mysql-test/suite/binlog/t/binlog_killed.test

@@ -39,7 +39,7 @@ connection con2;
 reap;
 let $rows= `select count(*) from t2  /* must be 2 or 0 */`;
 
---exec $MYSQL_BINLOG --start-position=134 $MYSQLTEST_VARDIR/log/master-bin.000001 > $MYSQLTEST_VARDIR/tmp/kill_query_calling_sp.binlog
+--exec $MYSQL_BINLOG --force-if-open --start-position=134 $MYSQLTEST_VARDIR/log/master-bin.000001 > $MYSQLTEST_VARDIR/tmp/kill_query_calling_sp.binlog
 --replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
 eval select
 (@a:=load_file("$MYSQLTEST_VARDIR/tmp/kill_query_calling_sp.binlog"))
@@ -250,7 +250,7 @@ source include/show_binlog_events.inc;
 
 # a proof the query is binlogged with an error
 
---exec $MYSQL_BINLOG --start-position=106 $MYSQLTEST_VARDIR/log/master-bin.000001 > $MYSQLTEST_VARDIR/tmp/binlog_killed_bug27571.binlog
+--exec $MYSQL_BINLOG --force-if-open --start-position=106 $MYSQLTEST_VARDIR/log/master-bin.000001 > $MYSQLTEST_VARDIR/tmp/binlog_killed_bug27571.binlog
 --replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
 eval select
 (@a:=load_file("$MYSQLTEST_VARDIR/tmp/binlog_killed_bug27571.binlog"))
@@ -296,7 +296,7 @@ source include/show_binlog_events.inc;
 
 # a proof the query is binlogged with an error
 
---exec $MYSQL_BINLOG --start-position=106 $MYSQLTEST_VARDIR/log/master-bin.000001 > $MYSQLTEST_VARDIR/tmp/binlog_killed_bug27571.binlog
+--exec $MYSQL_BINLOG --force-if-open --start-position=106 $MYSQLTEST_VARDIR/log/master-bin.000001 > $MYSQLTEST_VARDIR/tmp/binlog_killed_bug27571.binlog
 --replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
 eval select
 (@a:=load_file("$MYSQLTEST_VARDIR/tmp/binlog_killed_bug27571.binlog"))

mysql-test/suite/binlog/t/binlog_killed_simulate.test

@@ -23,7 +23,7 @@ update t1 set a=2 /* will be "killed" after work has been done */;
 #todo: introduce a suite private macro that provides numeric values
 #      for some constants like the offset of the first real event
 #      that is different between severs versions.
---exec $MYSQL_BINLOG --start-position=106 $MYSQLTEST_VARDIR/log/master-bin.000001 > $MYSQLTEST_VARDIR/tmp/binlog_killed_bug27571.binlog
+--exec $MYSQL_BINLOG --force-if-open --start-position=106 $MYSQLTEST_VARDIR/log/master-bin.000001 > $MYSQLTEST_VARDIR/tmp/binlog_killed_bug27571.binlog
 --replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
 eval select
 (@a:=load_file("$MYSQLTEST_VARDIR/tmp/binlog_killed_bug27571.binlog"))
@@ -51,7 +51,7 @@ load data infile '../std_data_ln/rpl_loaddata.dat' into table t2 /* will be "kil
 
 source include/show_binlog_events.inc;
 
---exec $MYSQL_BINLOG --start-position=98 $MYSQLTEST_VARDIR/log/master-bin.000001 > $MYSQLTEST_VARDIR/tmp/binlog_killed_bug27571.binlog
+--exec $MYSQL_BINLOG --force-if-open --start-position=98 $MYSQLTEST_VARDIR/log/master-bin.000001 > $MYSQLTEST_VARDIR/tmp/binlog_killed_bug27571.binlog
 --replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR
 eval select
 (@a:=load_file("$MYSQLTEST_VARDIR/tmp/binlog_killed_bug27571.binlog"))

mysql-test/suite/binlog/t/disabled.def

@@ -10,4 +10,3 @@
 #
 ##############################################################################
 binlog_multi_engine      : Bug#32663 binlog_multi_engine.test fails randomly
-binlog_base64_flag : BUG#33247 2007-12-14 Sven: mysqlbinlog does not clean up after itself on termination. When compiled in debug mode, this test generates lots of warnings for memory leaks.