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| author | heikki@hundin.mysql.fi <> | 2004-05-13 22:07:51 +0300 |
|---|---|---|
| committer | heikki@hundin.mysql.fi <> | 2004-05-13 22:07:51 +0300 |
| commit | d2649c110a3779196d0873378024a3c26d1a17f4 (patch) | |
| tree | beee046ed5311453bdb6ab92309349eb05cd9510 /innobase/trx | |
| parent | 55e777572556eb5cd5ef001d6fc4218080849c13 (diff) | |
| download | mariadb-git-d2649c110a3779196d0873378024a3c26d1a17f4.tar.gz | |
ha_innodb.cc, trx0trx.h, lock0lock.c, trx0trx.c:
Reserve the MySQL LOCK_thread_count mutex when printing thd->query of
an arbitrary transaction; if we are printing thd->query of a transaction that
we know is currently executing inside InnoDB, then we know that MySQL cannot
meanwhile change thd->query, and no need to reserve the MySQL mutex; note
that this patch still leaves open the possibility of races in MySQL's
thd->query_len
Diffstat (limited to 'innobase/trx')
| -rw-r--r-- | innobase/trx/trx0trx.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/innobase/trx/trx0trx.c b/innobase/trx/trx0trx.c index 69cd6c7b22d..335e1f69228 100644 --- a/innobase/trx/trx0trx.c +++ b/innobase/trx/trx0trx.c @@ -1562,7 +1562,9 @@ trx_mark_sql_stat_end( /************************************************************************** Prints info about a transaction to the standard output. The caller must -own the kernel mutex. */ +own the kernel mutex and must have called +innobase_mysql_prepare_print_arbitrary_thd(), unless he knows that MySQL or +InnoDB cannot meanwhile change the info printed here. */ void trx_print( |