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Bug #38883 (reopened): thd_security_context is not thread safe, crashes?

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manual merge 5.0-->5.1, updating InnoDB plugin.
This commit is contained in:
Gleb Shchepa 2009-12-01 14:38:40 +04:00
commit b2fc91147a
11 changed files with 9 additions and 139 deletions
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29
storage/innobase/handler/ha_innodb.cc
View file

@ -770,35 +770,6 @@ convert_error_code_to_mysql(
}
}
/*****************************************************************
If you want to print a thd that is not associated with the current thread,
you must call this function before reserving the InnoDB kernel_mutex, to
protect MySQL from setting thd->query NULL. If you print a thd of the current
thread, we know that MySQL cannot modify thd->query, and it is not necessary
to call this. Call innobase_mysql_end_print_arbitrary_thd() after you release
the kernel_mutex.
NOTE that /mysql/innobase/lock/lock0lock.c must contain the prototype for this
function! */
extern "C"
void
innobase_mysql_prepare_print_arbitrary_thd(void)
/*============================================*/
{
VOID(pthread_mutex_lock(&LOCK_thread_count));
}
/*****************************************************************
Releases the mutex reserved by innobase_mysql_prepare_print_arbitrary_thd().
NOTE that /mysql/innobase/lock/lock0lock.c must contain the prototype for this
function! */
extern "C"
void
innobase_mysql_end_print_arbitrary_thd(void)
/*========================================*/
{
VOID(pthread_mutex_unlock(&LOCK_thread_count));
}
/*****************************************************************
Prints info of a THD object (== user session thread) to the given file.
NOTE that /mysql/innobase/trx/trx0trx.c must contain the prototype for

4
storage/innobase/include/trx0trx.h
View file

@ -318,9 +318,7 @@ trx_commit_step(
/**************************************************************************
Prints info about a transaction to the given file. The caller must 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. */
kernel mutex. */
void
trx_print(

33
storage/innobase/lock/lock0lock.c
View file

@ -22,31 +22,6 @@ Created 5/7/1996 Heikki Tuuri
#include "trx0sys.h"
/* 2 function prototypes copied from ha_innodb.cc: */
/*****************************************************************
If you want to print a thd that is not associated with the current thread,
you must call this function before reserving the InnoDB kernel_mutex, to
protect MySQL from setting thd->query NULL. If you print a thd of the current
thread, we know that MySQL cannot modify thd->query, and it is not necessary
to call this. Call innobase_mysql_end_print_arbitrary_thd() after you release
the kernel_mutex.
NOTE that /mysql/innobase/lock/lock0lock.c must contain the prototype for this
function! */
void
innobase_mysql_prepare_print_arbitrary_thd(void);
/*============================================*/
/*****************************************************************
Relases the mutex reserved by innobase_mysql_prepare_print_arbitrary_thd().
NOTE that /mysql/innobase/lock/lock0lock.c must contain the prototype for this
function! */
void
innobase_mysql_end_print_arbitrary_thd(void);
/*========================================*/
/* Restricts the length of search we will do in the waits-for
graph of transactions */
#define LOCK_MAX_N_STEPS_IN_DEADLOCK_CHECK 1000000
@ -4222,11 +4197,6 @@ lock_print_info_summary(
/*====================*/
FILE* file) /* in: file where to print */
{
/* We must protect the MySQL thd->query field with a MySQL mutex, and
because the MySQL mutex must be reserved before the kernel_mutex of
InnoDB, we call innobase_mysql_prepare_print_arbitrary_thd() here. */
innobase_mysql_prepare_print_arbitrary_thd();
lock_mutex_enter_kernel();
if (lock_deadlock_found) {
@ -4314,7 +4284,6 @@ loop:
if (trx == NULL) {
lock_mutex_exit_kernel();
innobase_mysql_end_print_arbitrary_thd();
ut_ad(lock_validate());
@ -4386,7 +4355,6 @@ loop:
if (load_page_first) {
lock_mutex_exit_kernel();
innobase_mysql_end_print_arbitrary_thd();
mtr_start(&mtr);
@ -4397,7 +4365,6 @@ loop:
load_page_first = FALSE;
innobase_mysql_prepare_print_arbitrary_thd();
lock_mutex_enter_kernel();
goto loop;

4
storage/innobase/trx/trx0trx.c
View file

@ -1652,9 +1652,7 @@ trx_mark_sql_stat_end(
/**************************************************************************
Prints info about a transaction to the given file. The caller must 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. */
kernel mutex. */
void
trx_print(