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Update comments to match new debug_sync implementation

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This commit is contained in:
Vicențiu Ciorbaru 2023-02-04 12:10:31 +02:00
parent 96a3b11d13
commit e83ae66e4a
2 changed files with 8 additions and 10 deletions
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11
mysql-test/main/debug_sync.test
View File

@ -231,15 +231,12 @@ SHOW VARIABLES LIKE 'DEBUG_SYNC';
# 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.
# NOTE: There can be multiple active signals at the same time.
# A SIGNAL action appends its signal into signals set.
# The signal persists until waited on.
# 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:
# the signal set by running
# SET DEBUG_SYNC= 'RESET';
# The signal is then '' (really empty) which connot be done otherwise.
#
#

7
sql/debug_sync.cc
View File

@ -1344,7 +1344,8 @@ static bool debug_sync_eval_action(THD *thd, char *action_str, char *action_end)
/*
Try NO_CLEAR_EVENT.
*/
if (!my_strcasecmp(system_charset_info, token, "NO_CLEAR_EVENT")) {
if (!my_strcasecmp(system_charset_info, token, "NO_CLEAR_EVENT"))
{
action->clear_event= false;
/* Get next token. If none follows, set action. */
if (!(ptr = debug_sync_token(&token, &token_length, ptr, action_end))) goto set_action;
@ -1634,8 +1635,8 @@ static void debug_sync_execute(THD *thd, st_debug_sync_action *action)
/*
Wait until global signal string matches the wait_for string.
Interrupt when thread or query is killed or facility disabled.
Wait until the signal set contains the wait_for string.
Interrupt when thread or query is killed or facility is disabled.
The facility can become disabled when some thread cannot get
the required dynamic memory allocated.
*/