mariadb/mysql-test/t/debug_sync.test

###################### t/debug_sync.test ###############################
#                                                                      #
# Testing of the Debug Sync Facility.                                  #
#                                                                      #
# There is important documentation within sql/debug_sync.cc            #
#                                                                      #
# Used objects in this test case:                                      #
# p0 - synchronization point 0. Non-existent dummy sync point.         #
# s1 - signal 1.                                                       #
# s2 - signal 2.                                                       #
#                                                                      #
# Creation:                                                            #
# 2008-02-18 istruewing                                                #
#                                                                      #
########################################################################

#
# We need the Debug Sync Facility.
#
--source include/have_debug_sync.inc

#
# We are checking privileges, which the embedded server cannot do.
#
--source include/not_embedded.inc

#
# Preparative cleanup.
#
--disable_warnings
SET DEBUG_SYNC= 'RESET';
DROP TABLE IF EXISTS t1;
--enable_warnings

#
# Show the special system variable.
# It shows ON or OFF depending on the command line option --debug-sync.
# The test case assumes it is ON (command line option present).
#
SHOW VARIABLES LIKE 'DEBUG_SYNC';

#
# Syntax. Valid forms.
#
SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2 TIMEOUT 6 EXECUTE 2 HIT_LIMIT 3';
SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2 TIMEOUT 6 EXECUTE 2';
SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2 TIMEOUT 6           HIT_LIMIT 3';
SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2 TIMEOUT 6';
SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2           EXECUTE 2 HIT_LIMIT 3';
SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2           EXECUTE 2';
SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2                     HIT_LIMIT 3';
SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2';
SET DEBUG_SYNC='p0 SIGNAL s1                       EXECUTE 2 HIT_LIMIT 3';
SET DEBUG_SYNC='p0 SIGNAL s1                       EXECUTE 2';
SET DEBUG_SYNC='p0 SIGNAL s1                                 HIT_LIMIT 3';
SET DEBUG_SYNC='p0 SIGNAL s1';
SET DEBUG_SYNC='p0           WAIT_FOR s2 TIMEOUT 6 EXECUTE 2 HIT_LIMIT 3';
SET DEBUG_SYNC='p0           WAIT_FOR s2 TIMEOUT 6 EXECUTE 2';
SET DEBUG_SYNC='p0           WAIT_FOR s2 TIMEOUT 6           HIT_LIMIT 3';
SET DEBUG_SYNC='p0           WAIT_FOR s2 TIMEOUT 6';
SET DEBUG_SYNC='p0           WAIT_FOR s2           EXECUTE 2 HIT_LIMIT 3';
SET DEBUG_SYNC='p0           WAIT_FOR s2           EXECUTE 2';
SET DEBUG_SYNC='p0           WAIT_FOR s2                     HIT_LIMIT 3';
SET DEBUG_SYNC='p0           WAIT_FOR s2';
SET DEBUG_SYNC='p0                                           HIT_LIMIT 3';
SET DEBUG_SYNC='p0 CLEAR';
SET DEBUG_SYNC='p0 TEST';
SET DEBUG_SYNC='RESET';

#
# Syntax. Valid forms. Lower case.
#
set debug_sync='p0 signal s1 wait_for s2 timeout 6 execute 2 hit_limit 3';
set debug_sync='p0 signal s1 wait_for s2 timeout 6 execute 2';
set debug_sync='p0 signal s1 wait_for s2 timeout 6           hit_limit 3';
set debug_sync='p0 signal s1 wait_for s2 timeout 6';
set debug_sync='p0 signal s1 wait_for s2           execute 2 hit_limit 3';
set debug_sync='p0 signal s1 wait_for s2           execute 2';
set debug_sync='p0 signal s1 wait_for s2                     hit_limit 3';
set debug_sync='p0 signal s1 wait_for s2';
set debug_sync='p0 signal s1                       execute 2 hit_limit 3';
set debug_sync='p0 signal s1                       execute 2';
set debug_sync='p0 signal s1                                 hit_limit 3';
set debug_sync='p0 signal s1';
set debug_sync='p0           wait_for s2 timeout 6 execute 2 hit_limit 3';
set debug_sync='p0           wait_for s2 timeout 6 execute 2';
set debug_sync='p0           wait_for s2 timeout 6           hit_limit 3';
set debug_sync='p0           wait_for s2 timeout 6';
set debug_sync='p0           wait_for s2           execute 2 hit_limit 3';
set debug_sync='p0           wait_for s2           execute 2';
set debug_sync='p0           wait_for s2                     hit_limit 3';
set debug_sync='p0           wait_for s2';
set debug_sync='p0                                           hit_limit 3';
set debug_sync='p0 clear';
set debug_sync='p0 test';
set debug_sync='reset';

#
# Syntax. Valid forms. Line wrap, leading, mid, trailing space.
#
SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2 TIMEOUT 6
                EXECUTE 2 HIT_LIMIT 3';
SET DEBUG_SYNC='   p0 SIGNAL s1 WAIT_FOR s2';
SET DEBUG_SYNC='p0    SIGNAL    s1    WAIT_FOR    s2';
SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2   ';
SET DEBUG_SYNC='   p0 SIGNAL s1 WAIT_FOR s2   ';
SET DEBUG_SYNC='   p0    SIGNAL    s1    WAIT_FOR    s2   ';

#
# Syntax. Invalid forms.
#
--error ER_PARSE_ERROR
SET DEBUG_SYNC='';
--error ER_PARSE_ERROR
SET DEBUG_SYNC=' ';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0                                          EXECUTE 2';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0                                TIMEOUT 6 EXECUTE 2';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0                                TIMEOUT 6';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 WAIT_FOR s2 SIGNAL s1';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 WAIT_FOR s2 SIGNAL s1           EXECUTE 2';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 WAIT_FOR s2 SIGNAL s1 TIMEOUT 6 EXECUTE 2';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 WAIT_FOR s2 SIGNAL s1 TIMEOUT 6';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 WAIT_FOR s2 TIMEOUT 6 SIGNAL s1 EXECUTE 2';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 WAIT_FOR s2 TIMEOUT 6 SIGNAL s1';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 TIMEOUT 6 WAIT_FOR s2 EXECUTE 2';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 TIMEOUT 6 WAIT_FOR s2';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0                  SIGNAL s1 TIMEOUT 6 EXECUTE 2';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0                  SIGNAL s1 TIMEOUT 6';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 EXECUTE 2 SIGNAL s1 TIMEOUT 6';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 TIMEOUT 6 SIGNAL s1';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 EXECUTE 2 TIMEOUT 6 SIGNAL s1';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 CLEAR HIT_LIMIT 3';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='CLEAR';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 CLEAR p0';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='TEST';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 TEST p0';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 RESET';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='RESET p0';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 RESET p0';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 SIGNAL ';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 WAIT_FOR ';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 SIGNAL s1 EXECUTE ';

#
# Syntax. Invalid keywords used.
#
--error ER_UNKNOWN_SYSTEM_VARIABLE
SET DEBUG_SYNCx='p0 SIGNAL s1 WAIT_FOR s2 TIMEOUT 6 EXECUTE 2 HIT_LIMIT 3';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 SIGNAx s1 WAIT_FOR s2 TIMEOUT 6 EXECUTE 2 HIT_LIMIT 3';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOx s2 TIMEOUT 6 EXECUTE 2 HIT_LIMIT 3';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2 TIMEOUx 0 EXECUTE 2 HIT_LIMIT 3';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2 TIMEOUT 6 EXECUTx 2 HIT_LIMIT 3';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2 TIMEOUT 6 EXECUTE 2 HIT_LIMIx 3';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 CLEARx';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 TESTx';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='RESETx';

#
# Syntax. Invalid numbers. Decimal only.
#
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 WAIT_FOR s2 TIMEOUT 0x6 EXECUTE 2 HIT_LIMIT 3';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 WAIT_FOR s2 TIMEOUT 6 EXECUTE 0x2 HIT_LIMIT 3';
--error ER_PARSE_ERROR
SET DEBUG_SYNC='p0 WAIT_FOR s2 TIMEOUT 7 EXECUTE 2 HIT_LIMIT 0x3';

#
# Syntax. Invalid value type.
#
--error ER_WRONG_TYPE_FOR_VAR
SET DEBUG_SYNC= 7;

#
# Syntax. DEBUG_SYNC is a SESSION-only variable.
#
--error ER_LOCAL_VARIABLE
SET GLOBAL DEBUG_SYNC= 'p0 CLEAR';

#
# Syntax. The variable value does not need to be a string literal.
#
SET @myvar= 'now SIGNAL from_myvar';
SET DEBUG_SYNC= @myvar;
SHOW VARIABLES LIKE 'DEBUG_SYNC';
#
SET DEBUG_SYNC= LEFT('now SIGNAL from_function_cut_here', 24);
SHOW VARIABLES LIKE 'DEBUG_SYNC';

#
# Functional tests.
#
# NOTE: There is the special synchronization point 'now'. It is placed
#       immediately after setting of the DEBUG_SYNC variable.
#       So it is executed before the SET statement ends.
#
# NOTE: There is only one global signal (say "signal post" or "flag mast").
#       A SIGNAL action writes its signal into it ("sets a flag").
#       The signal persists until explicitly overwritten.
#       To avoid confusion for later tests, it is recommended to clear
#       the signal by signalling "empty" ("setting the 'empty' flag"):
#       SET DEBUG_SYNC= 'now SIGNAL empty';
#       Preferably you can reset the whole facility with:
#       SET DEBUG_SYNC= 'RESET';
#       The signal is then '' (really empty) which connot be done otherwise.
#

#
# Time out immediately. This gives just a warning.
#
SET DEBUG_SYNC= 'now SIGNAL something';
SHOW VARIABLES LIKE 'DEBUG_SYNC';
# Suppress warning number
--replace_column 2 ####
SET DEBUG_SYNC= 'now WAIT_FOR nothing TIMEOUT 0';
#
# If signal is present already, TIMEOUT 0 does not give a warning.
#
SET DEBUG_SYNC= 'now SIGNAL nothing';
SHOW VARIABLES LIKE 'DEBUG_SYNC';
SET DEBUG_SYNC= 'now WAIT_FOR nothing TIMEOUT 0';

#
# EXECUTE 0 is effectively a no-op.
#
SET DEBUG_SYNC= 'now SIGNAL something EXECUTE 0';
SHOW VARIABLES LIKE 'DEBUG_SYNC';
SET DEBUG_SYNC= 'now WAIT_FOR anotherthing TIMEOUT 0 EXECUTE 0';

#
# Run into HIT_LIMIT. This gives an error.
#
--error ER_DEBUG_SYNC_HIT_LIMIT
SET DEBUG_SYNC= 'now HIT_LIMIT 1';

#
# Many actions. Watch the array growing and shrinking in the debug trace:
# egrep 'query:|debug_sync_action:' mysql-test/var/log/master.trace
#
SET DEBUG_SYNC= 'RESET';
SHOW VARIABLES LIKE 'DEBUG_SYNC';
SET DEBUG_SYNC= 'p1abcd   SIGNAL s1 EXECUTE 2';
SET DEBUG_SYNC= 'p2abc    SIGNAL s2 EXECUTE 2';
SET DEBUG_SYNC= 'p9abcdef SIGNAL s9 EXECUTE 2';
SET DEBUG_SYNC= 'p4a      SIGNAL s4 EXECUTE 2';
SET DEBUG_SYNC= 'p5abcde  SIGNAL s5 EXECUTE 2';
SET DEBUG_SYNC= 'p6ab     SIGNAL s6 EXECUTE 2';
SET DEBUG_SYNC= 'p7       SIGNAL s7 EXECUTE 2';
SET DEBUG_SYNC= 'p8abcdef SIGNAL s8 EXECUTE 2';
SET DEBUG_SYNC= 'p3abcdef SIGNAL s3 EXECUTE 2';
#
# Execute some actions to show they exist. Each sets a distinct signal.
#
SET DEBUG_SYNC= 'p4a      TEST';
SHOW VARIABLES LIKE 'DEBUG_SYNC';
SET DEBUG_SYNC= 'p1abcd   TEST';
SHOW VARIABLES LIKE 'DEBUG_SYNC';
SET DEBUG_SYNC= 'p7       TEST';
SHOW VARIABLES LIKE 'DEBUG_SYNC';
SET DEBUG_SYNC= 'p9abcdef TEST';
SHOW VARIABLES LIKE 'DEBUG_SYNC';
SET DEBUG_SYNC= 'p3abcdef TEST';
SHOW VARIABLES LIKE 'DEBUG_SYNC';
#
# Clear the actions.
#
SET DEBUG_SYNC= 'p1abcd   CLEAR';
SET DEBUG_SYNC= 'p2abc    CLEAR';
SET DEBUG_SYNC= 'p5abcde  CLEAR';
SET DEBUG_SYNC= 'p6ab     CLEAR';
SET DEBUG_SYNC= 'p8abcdef CLEAR';
SET DEBUG_SYNC= 'p9abcdef CLEAR';
SET DEBUG_SYNC= 'p3abcdef CLEAR';
SET DEBUG_SYNC= 'p4a      CLEAR';
SET DEBUG_SYNC= 'p7       CLEAR';
#
# Execute some actions to show they have gone.
#
SET DEBUG_SYNC= 'p1abcd   TEST';
SHOW VARIABLES LIKE 'DEBUG_SYNC';
SET DEBUG_SYNC= 'p7       TEST';
SHOW VARIABLES LIKE 'DEBUG_SYNC';
SET DEBUG_SYNC= 'p9abcdef TEST';
SHOW VARIABLES LIKE 'DEBUG_SYNC';
#
# Now cleanup. Actions are clear already, but signal needs to be cleared.
#
SET DEBUG_SYNC= 'RESET';
SHOW VARIABLES LIKE 'DEBUG_SYNC';

#
# Facility requires SUPER privilege.
#
CREATE USER mysqltest_1@localhost;
GRANT SUPER ON *.* TO mysqltest_1@localhost;
connect (con1,localhost,mysqltest_1,,);
SET DEBUG_SYNC= 'RESET';
disconnect con1;
connection default;
DROP USER mysqltest_1@localhost;
#
CREATE USER mysqltest_2@localhost;
GRANT ALL ON *.* TO mysqltest_2@localhost;
REVOKE SUPER ON *.* FROM mysqltest_2@localhost;
connect (con1,localhost,mysqltest_2,,);
--error ER_SPECIFIC_ACCESS_DENIED_ERROR
SET DEBUG_SYNC= 'RESET';
disconnect con1;
connection default;
DROP USER mysqltest_2@localhost;

#
# Example 1.
#
# Preparative cleanup.
--disable_warnings
SET DEBUG_SYNC= 'RESET';
DROP TABLE IF EXISTS t1;
--enable_warnings
#
# Test.
CREATE TABLE t1 (c1 INT);
    connect (con1,localhost,root,,);
    SET DEBUG_SYNC= 'before_lock_tables_takes_lock
      SIGNAL opened WAIT_FOR flushed';
    send INSERT INTO t1 VALUES(1);
connection default;
SET DEBUG_SYNC= 'now WAIT_FOR opened';
SET DEBUG_SYNC= 'after_flush_unlock SIGNAL flushed';
FLUSH TABLE t1;
    connection con1;
    reap;
    disconnect con1;
connection default;
DROP TABLE t1;

#
# Example 2.
#
# Preparative cleanup.
--disable_warnings
SET DEBUG_SYNC= 'RESET';
DROP TABLE IF EXISTS t1;
--enable_warnings
#
# Test.
CREATE TABLE t1 (c1 INT) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1);
SELECT GET_LOCK('mysqltest_lock', 100);

connect (con1,localhost,root,,);
--echo # Sending:
--send UPDATE t1 SET c1=GET_LOCK('mysqltest_lock', 100);

connect (con2,localhost,root,,);
let $wait_condition=
  select count(*) = 1 from information_schema.processlist
  where state = "User lock" and
        info = "UPDATE t1 SET c1=GET_LOCK('mysqltest_lock', 100)";
--source include/wait_condition.inc

# Retain action after use. First used by general_log.
SET DEBUG_SYNC= 'wait_for_lock SIGNAL locked EXECUTE 2';
send INSERT INTO t1 VALUES (1);

connection default;
# Wait until INSERT waits for lock.
SET DEBUG_SYNC= 'now WAIT_FOR locked';
# let UPDATE continue.
SELECT RELEASE_LOCK('mysqltest_lock');
connection con1;
--echo # Reaping UPDATE
reap;
SELECT RELEASE_LOCK('mysqltest_lock');

connection con2;
--echo retrieve INSERT result.
reap;
disconnect con1;
disconnect con2;
connection default;
DROP TABLE t1;

#
# Cleanup after test case.
# Otherwise signal would contain 'flushed' here,
# which could confuse the next test.
#
SET DEBUG_SYNC= 'RESET';