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4d57b851a0
Backport from 6.0 to 5.1.
Only those sync points are included, which are used in debug_sync.test.
The Debug Sync Facility allows to place synchronization points
in the code:
open_tables(...)
DEBUG_SYNC(thd, "after_open_tables");
lock_tables(...)
When activated, a sync point can
- Send a signal and/or
- Wait for a signal
Nomenclature:
- signal: A value of a global variable that persists
until overwritten by a new signal. The global
variable can also be seen as a "signal post"
or "flag mast". Then the signal is what is
attached to the "signal post" or "flag mast".
- send a signal: Assign the value (the signal) to the global
variable ("set a flag") and broadcast a
global condition to wake those waiting for
a signal.
- wait for a signal: Loop over waiting for the global condition until
the global value matches the wait-for signal.
Please find more information in the top comment in debug_sync.cc
or in the worklog entry.
.bzrignore:
WL#4259 - Debug Sync Facility
Added the symbolic link libmysqld/debug_sync.cc.
CMakeLists.txt:
WL#4259 - Debug Sync Facility
Added definition for ENABLED_DEBUG_SYNC.
configure.in:
WL#4259 - Debug Sync Facility
Added definition for ENABLED_DEBUG_SYNC.
include/my_sys.h:
WL#4259 - Debug Sync Facility
Added definition for the DEBUG_SYNC_C macro.
libmysqld/CMakeLists.txt:
WL#4259 - Debug Sync Facility
Added sql/debug_sync.cc.
libmysqld/Makefile.am:
WL#4259 - Debug Sync Facility
Added sql/debug_sync.cc.
mysql-test/include/have_debug_sync.inc:
WL#4259 - Debug Sync Facility
New include file.
mysql-test/mysql-test-run.pl:
WL#4259 - Debug Sync Facility
Added option --debug_sync_timeout.
mysql-test/r/debug_sync.result:
WL#4259 - Debug Sync Facility
New test result.
mysql-test/r/have_debug_sync.require:
WL#4259 - Debug Sync Facility
New require file.
mysql-test/t/debug_sync.test:
WL#4259 - Debug Sync Facility
New test file.
mysys/my_static.c:
WL#4259 - Debug Sync Facility
Added definition for debug_sync_C_callback_ptr.
mysys/thr_lock.c:
WL#4259 - Debug Sync Facility
Added sync point "wait_for_lock".
sql/CMakeLists.txt:
WL#4259 - Debug Sync Facility
Added debug_sync.cc and debug_sync.h.
sql/Makefile.am:
WL#4259 - Debug Sync Facility
Added debug_sync.cc and debug_sync.h.
sql/debug_sync.cc:
WL#4259 - Debug Sync Facility
New source file.
sql/debug_sync.h:
WL#4259 - Debug Sync Facility
New header file.
sql/mysqld.cc:
WL#4259 - Debug Sync Facility
Added opt_debug_sync_timeout.
Added calls to debug_sync_init() and debug_sync_end().
Fixed a purecov comment (unrelated).
sql/set_var.cc:
WL#4259 - Debug Sync Facility
Added server variable "debug_sync".
sql/set_var.h:
WL#4259 - Debug Sync Facility
Added declaration for server variable "debug_sync".
sql/share/errmsg.txt:
WL#4259 - Debug Sync Facility
Added error messages ER_DEBUG_SYNC_TIMEOUT and ER_DEBUG_SYNC_HIT_LIMIT.
sql/sql_base.cc:
WL#4259 - Debug Sync Facility
Added sync points "after_flush_unlock" and "before_lock_tables_takes_lock".
sql/sql_class.cc:
WL#4259 - Debug Sync Facility
Added initialization for debug_sync_control to THD::THD.
Added calls to debug_sync_init_thread() and debug_sync_end_thread().
sql/sql_class.h:
WL#4259 - Debug Sync Facility
Added element debug_sync_control to THD.
storage/myisam/myisamchk.c:
Fixed a typo in an error message string (unrelated).
278 lines
12 KiB
Plaintext
278 lines
12 KiB
Plaintext
SET DEBUG_SYNC= 'RESET';
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DROP TABLE IF EXISTS t1;
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SHOW VARIABLES LIKE 'DEBUG_SYNC';
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Variable_name Value
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debug_sync ON - current signal: ''
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SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2 TIMEOUT 6 EXECUTE 2 HIT_LIMIT 3';
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SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2 TIMEOUT 6 EXECUTE 2';
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SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2 TIMEOUT 6 HIT_LIMIT 3';
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SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2 TIMEOUT 6';
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SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2 EXECUTE 2 HIT_LIMIT 3';
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SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2 EXECUTE 2';
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SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2 HIT_LIMIT 3';
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SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2';
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SET DEBUG_SYNC='p0 SIGNAL s1 EXECUTE 2 HIT_LIMIT 3';
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SET DEBUG_SYNC='p0 SIGNAL s1 EXECUTE 2';
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SET DEBUG_SYNC='p0 SIGNAL s1 HIT_LIMIT 3';
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SET DEBUG_SYNC='p0 SIGNAL s1';
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SET DEBUG_SYNC='p0 WAIT_FOR s2 TIMEOUT 6 EXECUTE 2 HIT_LIMIT 3';
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SET DEBUG_SYNC='p0 WAIT_FOR s2 TIMEOUT 6 EXECUTE 2';
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SET DEBUG_SYNC='p0 WAIT_FOR s2 TIMEOUT 6 HIT_LIMIT 3';
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SET DEBUG_SYNC='p0 WAIT_FOR s2 TIMEOUT 6';
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SET DEBUG_SYNC='p0 WAIT_FOR s2 EXECUTE 2 HIT_LIMIT 3';
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SET DEBUG_SYNC='p0 WAIT_FOR s2 EXECUTE 2';
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SET DEBUG_SYNC='p0 WAIT_FOR s2 HIT_LIMIT 3';
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SET DEBUG_SYNC='p0 WAIT_FOR s2';
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SET DEBUG_SYNC='p0 HIT_LIMIT 3';
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SET DEBUG_SYNC='p0 CLEAR';
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SET DEBUG_SYNC='p0 TEST';
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SET DEBUG_SYNC='RESET';
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set debug_sync='p0 signal s1 wait_for s2 timeout 6 execute 2 hit_limit 3';
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set debug_sync='p0 signal s1 wait_for s2 timeout 6 execute 2';
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set debug_sync='p0 signal s1 wait_for s2 timeout 6 hit_limit 3';
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set debug_sync='p0 signal s1 wait_for s2 timeout 6';
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set debug_sync='p0 signal s1 wait_for s2 execute 2 hit_limit 3';
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set debug_sync='p0 signal s1 wait_for s2 execute 2';
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set debug_sync='p0 signal s1 wait_for s2 hit_limit 3';
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set debug_sync='p0 signal s1 wait_for s2';
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set debug_sync='p0 signal s1 execute 2 hit_limit 3';
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set debug_sync='p0 signal s1 execute 2';
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set debug_sync='p0 signal s1 hit_limit 3';
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set debug_sync='p0 signal s1';
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set debug_sync='p0 wait_for s2 timeout 6 execute 2 hit_limit 3';
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set debug_sync='p0 wait_for s2 timeout 6 execute 2';
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set debug_sync='p0 wait_for s2 timeout 6 hit_limit 3';
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set debug_sync='p0 wait_for s2 timeout 6';
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set debug_sync='p0 wait_for s2 execute 2 hit_limit 3';
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set debug_sync='p0 wait_for s2 execute 2';
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set debug_sync='p0 wait_for s2 hit_limit 3';
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set debug_sync='p0 wait_for s2';
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set debug_sync='p0 hit_limit 3';
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set debug_sync='p0 clear';
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set debug_sync='p0 test';
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set debug_sync='reset';
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SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2 TIMEOUT 6
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EXECUTE 2 HIT_LIMIT 3';
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SET DEBUG_SYNC=' p0 SIGNAL s1 WAIT_FOR s2';
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SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2';
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SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2 ';
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SET DEBUG_SYNC=' p0 SIGNAL s1 WAIT_FOR s2 ';
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SET DEBUG_SYNC=' p0 SIGNAL s1 WAIT_FOR s2 ';
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SET DEBUG_SYNC='';
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ERROR 42000: Missing synchronization point name
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SET DEBUG_SYNC=' ';
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ERROR 42000: Missing synchronization point name
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SET DEBUG_SYNC='p0';
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ERROR 42000: Missing action after synchronization point name 'p0'
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SET DEBUG_SYNC='p0 EXECUTE 2';
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ERROR 42000: Missing action before EXECUTE
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SET DEBUG_SYNC='p0 TIMEOUT 6 EXECUTE 2';
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ERROR 42000: Illegal or out of order stuff: 'TIMEOUT'
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SET DEBUG_SYNC='p0 TIMEOUT 6';
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ERROR 42000: Illegal or out of order stuff: 'TIMEOUT'
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SET DEBUG_SYNC='p0 WAIT_FOR s2 SIGNAL s1';
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ERROR 42000: Illegal or out of order stuff: 'SIGNAL'
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SET DEBUG_SYNC='p0 WAIT_FOR s2 SIGNAL s1 EXECUTE 2';
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ERROR 42000: Illegal or out of order stuff: 'SIGNAL'
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SET DEBUG_SYNC='p0 WAIT_FOR s2 SIGNAL s1 TIMEOUT 6 EXECUTE 2';
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ERROR 42000: Illegal or out of order stuff: 'SIGNAL'
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SET DEBUG_SYNC='p0 WAIT_FOR s2 SIGNAL s1 TIMEOUT 6';
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ERROR 42000: Illegal or out of order stuff: 'SIGNAL'
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SET DEBUG_SYNC='p0 WAIT_FOR s2 TIMEOUT 6 SIGNAL s1 EXECUTE 2';
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ERROR 42000: Illegal or out of order stuff: 'SIGNAL'
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SET DEBUG_SYNC='p0 WAIT_FOR s2 TIMEOUT 6 SIGNAL s1';
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ERROR 42000: Illegal or out of order stuff: 'SIGNAL'
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SET DEBUG_SYNC='p0 TIMEOUT 6 WAIT_FOR s2 EXECUTE 2';
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ERROR 42000: Illegal or out of order stuff: 'TIMEOUT'
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SET DEBUG_SYNC='p0 TIMEOUT 6 WAIT_FOR s2';
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ERROR 42000: Illegal or out of order stuff: 'TIMEOUT'
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SET DEBUG_SYNC='p0 SIGNAL s1 TIMEOUT 6 EXECUTE 2';
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ERROR 42000: Illegal or out of order stuff: 'TIMEOUT'
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SET DEBUG_SYNC='p0 SIGNAL s1 TIMEOUT 6';
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ERROR 42000: Illegal or out of order stuff: 'TIMEOUT'
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SET DEBUG_SYNC='p0 EXECUTE 2 SIGNAL s1 TIMEOUT 6';
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ERROR 42000: Missing action before EXECUTE
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SET DEBUG_SYNC='p0 TIMEOUT 6 SIGNAL s1';
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ERROR 42000: Illegal or out of order stuff: 'TIMEOUT'
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SET DEBUG_SYNC='p0 EXECUTE 2 TIMEOUT 6 SIGNAL s1';
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ERROR 42000: Missing action before EXECUTE
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SET DEBUG_SYNC='p0 CLEAR HIT_LIMIT 3';
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ERROR 42000: Nothing must follow action CLEAR
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SET DEBUG_SYNC='CLEAR';
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ERROR 42000: Missing action after synchronization point name 'CLEAR'
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SET DEBUG_SYNC='p0 CLEAR p0';
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ERROR 42000: Nothing must follow action CLEAR
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SET DEBUG_SYNC='TEST';
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ERROR 42000: Missing action after synchronization point name 'TEST'
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SET DEBUG_SYNC='p0 TEST p0';
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ERROR 42000: Nothing must follow action TEST
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SET DEBUG_SYNC='p0 RESET';
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ERROR 42000: Illegal or out of order stuff: 'RESET'
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SET DEBUG_SYNC='RESET p0';
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ERROR 42000: Illegal or out of order stuff: 'p0'
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SET DEBUG_SYNC='p0 RESET p0';
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ERROR 42000: Illegal or out of order stuff: 'RESET'
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SET DEBUG_SYNC='p0 SIGNAL ';
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ERROR 42000: Missing signal name after action SIGNAL
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SET DEBUG_SYNC='p0 WAIT_FOR ';
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ERROR 42000: Missing signal name after action WAIT_FOR
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SET DEBUG_SYNC='p0 SIGNAL s1 EXECUTE ';
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ERROR 42000: Missing valid number after EXECUTE
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SET DEBUG_SYNCx='p0 SIGNAL s1 WAIT_FOR s2 TIMEOUT 6 EXECUTE 2 HIT_LIMIT 3';
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ERROR HY000: Unknown system variable 'DEBUG_SYNCx'
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SET DEBUG_SYNC='p0 SIGNAx s1 WAIT_FOR s2 TIMEOUT 6 EXECUTE 2 HIT_LIMIT 3';
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ERROR 42000: Illegal or out of order stuff: 'SIGNAx'
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SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOx s2 TIMEOUT 6 EXECUTE 2 HIT_LIMIT 3';
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ERROR 42000: Illegal or out of order stuff: 'WAIT_FOx'
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SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2 TIMEOUx 0 EXECUTE 2 HIT_LIMIT 3';
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ERROR 42000: Illegal or out of order stuff: 'TIMEOUx'
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SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2 TIMEOUT 6 EXECUTx 2 HIT_LIMIT 3';
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ERROR 42000: Illegal or out of order stuff: 'EXECUTx'
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SET DEBUG_SYNC='p0 SIGNAL s1 WAIT_FOR s2 TIMEOUT 6 EXECUTE 2 HIT_LIMIx 3';
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ERROR 42000: Illegal or out of order stuff: 'HIT_LIMIx'
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SET DEBUG_SYNC='p0 CLEARx';
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ERROR 42000: Illegal or out of order stuff: 'CLEARx'
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SET DEBUG_SYNC='p0 TESTx';
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ERROR 42000: Illegal or out of order stuff: 'TESTx'
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SET DEBUG_SYNC='RESETx';
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ERROR 42000: Missing action after synchronization point name 'RESETx'
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SET DEBUG_SYNC='p0 WAIT_FOR s2 TIMEOUT 0x6 EXECUTE 2 HIT_LIMIT 3';
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ERROR 42000: Missing valid number after TIMEOUT
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SET DEBUG_SYNC='p0 WAIT_FOR s2 TIMEOUT 6 EXECUTE 0x2 HIT_LIMIT 3';
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ERROR 42000: Missing valid number after EXECUTE
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SET DEBUG_SYNC='p0 WAIT_FOR s2 TIMEOUT 7 EXECUTE 2 HIT_LIMIT 0x3';
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ERROR 42000: Missing valid number after HIT_LIMIT
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SET DEBUG_SYNC= 7;
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ERROR 42000: Incorrect argument type to variable 'debug_sync'
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SET GLOBAL DEBUG_SYNC= 'p0 CLEAR';
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ERROR HY000: Variable 'debug_sync' is a SESSION variable and can't be used with SET GLOBAL
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SET @myvar= 'now SIGNAL from_myvar';
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SET DEBUG_SYNC= @myvar;
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SHOW VARIABLES LIKE 'DEBUG_SYNC';
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Variable_name Value
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debug_sync ON - current signal: 'from_myvar'
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SET DEBUG_SYNC= LEFT('now SIGNAL from_function_cut_here', 24);
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SHOW VARIABLES LIKE 'DEBUG_SYNC';
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Variable_name Value
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debug_sync ON - current signal: 'from_function'
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SET DEBUG_SYNC= 'now SIGNAL something';
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SHOW VARIABLES LIKE 'DEBUG_SYNC';
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Variable_name Value
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debug_sync ON - current signal: 'something'
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SET DEBUG_SYNC= 'now WAIT_FOR nothing TIMEOUT 0';
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Warnings:
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Warning #### debug sync point wait timed out
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SET DEBUG_SYNC= 'now SIGNAL nothing';
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SHOW VARIABLES LIKE 'DEBUG_SYNC';
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Variable_name Value
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debug_sync ON - current signal: 'nothing'
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SET DEBUG_SYNC= 'now WAIT_FOR nothing TIMEOUT 0';
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SET DEBUG_SYNC= 'now SIGNAL something EXECUTE 0';
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SHOW VARIABLES LIKE 'DEBUG_SYNC';
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Variable_name Value
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debug_sync ON - current signal: 'nothing'
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SET DEBUG_SYNC= 'now WAIT_FOR anotherthing TIMEOUT 0 EXECUTE 0';
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SET DEBUG_SYNC= 'now HIT_LIMIT 1';
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ERROR HY000: debug sync point hit limit reached
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SET DEBUG_SYNC= 'RESET';
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SHOW VARIABLES LIKE 'DEBUG_SYNC';
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Variable_name Value
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debug_sync ON - current signal: ''
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SET DEBUG_SYNC= 'p1abcd SIGNAL s1 EXECUTE 2';
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SET DEBUG_SYNC= 'p2abc SIGNAL s2 EXECUTE 2';
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SET DEBUG_SYNC= 'p9abcdef SIGNAL s9 EXECUTE 2';
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SET DEBUG_SYNC= 'p4a SIGNAL s4 EXECUTE 2';
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SET DEBUG_SYNC= 'p5abcde SIGNAL s5 EXECUTE 2';
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SET DEBUG_SYNC= 'p6ab SIGNAL s6 EXECUTE 2';
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SET DEBUG_SYNC= 'p7 SIGNAL s7 EXECUTE 2';
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SET DEBUG_SYNC= 'p8abcdef SIGNAL s8 EXECUTE 2';
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SET DEBUG_SYNC= 'p3abcdef SIGNAL s3 EXECUTE 2';
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SET DEBUG_SYNC= 'p4a TEST';
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SHOW VARIABLES LIKE 'DEBUG_SYNC';
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Variable_name Value
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debug_sync ON - current signal: 's4'
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SET DEBUG_SYNC= 'p1abcd TEST';
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SHOW VARIABLES LIKE 'DEBUG_SYNC';
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Variable_name Value
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debug_sync ON - current signal: 's1'
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SET DEBUG_SYNC= 'p7 TEST';
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SHOW VARIABLES LIKE 'DEBUG_SYNC';
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Variable_name Value
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debug_sync ON - current signal: 's7'
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SET DEBUG_SYNC= 'p9abcdef TEST';
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SHOW VARIABLES LIKE 'DEBUG_SYNC';
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Variable_name Value
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debug_sync ON - current signal: 's9'
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SET DEBUG_SYNC= 'p3abcdef TEST';
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SHOW VARIABLES LIKE 'DEBUG_SYNC';
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Variable_name Value
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debug_sync ON - current signal: 's3'
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SET DEBUG_SYNC= 'p1abcd CLEAR';
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SET DEBUG_SYNC= 'p2abc CLEAR';
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SET DEBUG_SYNC= 'p5abcde CLEAR';
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SET DEBUG_SYNC= 'p6ab CLEAR';
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SET DEBUG_SYNC= 'p8abcdef CLEAR';
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SET DEBUG_SYNC= 'p9abcdef CLEAR';
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SET DEBUG_SYNC= 'p3abcdef CLEAR';
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SET DEBUG_SYNC= 'p4a CLEAR';
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SET DEBUG_SYNC= 'p7 CLEAR';
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SET DEBUG_SYNC= 'p1abcd TEST';
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SHOW VARIABLES LIKE 'DEBUG_SYNC';
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Variable_name Value
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debug_sync ON - current signal: 's3'
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SET DEBUG_SYNC= 'p7 TEST';
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SHOW VARIABLES LIKE 'DEBUG_SYNC';
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Variable_name Value
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debug_sync ON - current signal: 's3'
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SET DEBUG_SYNC= 'p9abcdef TEST';
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SHOW VARIABLES LIKE 'DEBUG_SYNC';
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Variable_name Value
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debug_sync ON - current signal: 's3'
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SET DEBUG_SYNC= 'RESET';
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SHOW VARIABLES LIKE 'DEBUG_SYNC';
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Variable_name Value
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debug_sync ON - current signal: ''
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CREATE USER mysqltest_1@localhost;
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GRANT SUPER ON *.* TO mysqltest_1@localhost;
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connection con1, mysqltest_1
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SET DEBUG_SYNC= 'RESET';
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connection default
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DROP USER mysqltest_1@localhost;
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CREATE USER mysqltest_2@localhost;
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GRANT ALL ON *.* TO mysqltest_2@localhost;
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REVOKE SUPER ON *.* FROM mysqltest_2@localhost;
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connection con1, mysqltest_2
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SET DEBUG_SYNC= 'RESET';
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ERROR 42000: Access denied; you need the SUPER privilege for this operation
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connection default
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DROP USER mysqltest_2@localhost;
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SET DEBUG_SYNC= 'RESET';
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DROP TABLE IF EXISTS t1;
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CREATE TABLE t1 (c1 INT);
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connection con1
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SET DEBUG_SYNC= 'before_lock_tables_takes_lock
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SIGNAL opened WAIT_FOR flushed';
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INSERT INTO t1 VALUES(1);
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connection default
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SET DEBUG_SYNC= 'now WAIT_FOR opened';
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SET DEBUG_SYNC= 'after_flush_unlock SIGNAL flushed';
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FLUSH TABLE t1;
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connection con1
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connection default
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DROP TABLE t1;
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SET DEBUG_SYNC= 'RESET';
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DROP TABLE IF EXISTS t1;
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CREATE TABLE t1 (c1 INT);
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LOCK TABLE t1 WRITE;
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connection con1
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SET DEBUG_SYNC= 'wait_for_lock SIGNAL locked EXECUTE 2';
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INSERT INTO t1 VALUES (1);
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connection default
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SET DEBUG_SYNC= 'now WAIT_FOR locked';
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UNLOCK TABLES;
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connection con1
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retrieve INSERT result.
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connection default
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DROP TABLE t1;
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SET DEBUG_SYNC= 'RESET';
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