#43371 [Opn]: Memory errors in PDO constructor
ID: 43371
Updated by: uw@php.net
Reported By: poletto at jeuxvideo dot com
Status: Open
Bug Type: PDO related
Operating System: Linux 2.4
PHP Version: 5.2.5
New Comment:
Can't reproduce with 5.3 CVS, PDO_MYSQLND and MySQL 5.0.51b-debug
Source distribution. No matter if I use mysqlnd or libmysql.
I haven't check PDO_MYSQL any more.
However, PDOs management of persistent connections seems to be not
perfect. I know of such an error:
done![Thu Jul 3 18:59:39 2008] Script:
'ext/pdo_mysqlnd/tests/pdo_mysql_pconnect.php'
/home/nixnutz/php53/ext/pdo/pdo_dbh.c(1514) : Freeing 0x06601898 (64
bytes), script=ext/pdo_mysqlnd/tests/pdo_mysql_pconnect.php
/home/nixnutz/php53/Zend/zend_alloc.c(2374) : Actual location (location
was relayed)
Last leak repeated 21 times
[Thu Jul 3 18:59:39 2008] Script:
'ext/pdo_mysqlnd/tests/pdo_mysql_pconnect.php'
/home/nixnutz/php53/ext/pdo/pdo_dbh.c(1513) : Freeing 0x06602910 (72
bytes), script=ext/pdo_mysqlnd/tests/pdo_mysql_pconnect.php
Last leak repeated 21 times
=== Total 44 memory leaks detected ===
==12737==
==12737== ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 0 from
0)
Previous Comments:
------------------------------------------------------------------------
[2007-11-22 17:09:20] poletto at jeuxvideo dot com
I can't try another version of mysql on this server.
I noticed there was no error when removing the persistant connection
------------------------------------------------------------------------
[2007-11-22 16:40:09] iliaa@php.net
It could be libmysqlclient related as you had suggested, can you try a
different version perhaps?
------------------------------------------------------------------------
[2007-11-22 15:20:11] poletto at jeuxvideo dot com
Same problem... Maybe a problem inside libmysqlclient?
> valgrind -q /usr/local/src/php5.3-200711221330/sapi/cli/php
test_pdo.php
==6951== Invalid read of size 4
==6951== at 0x40B29BD: my_strdup (in
/usr/local/MySQL-5.0.45/lib/libmysqlclient.so.15)
==6951== by 0x40D61D5: mysql_real_connect (in
/usr/local/MySQL-5.0.45/lib/libmysqlclient.so.15)
==6951== by 0x80F97AC: pdo_mysql_handle_factory
(mysql_driver.c:553)
==6951== by 0x80F0BE2: zim_PDO_dbh_constructor (pdo_dbh.c:372)
==6951== by 0x82380AA: zend_do_fcall_common_helper_SPEC
(zend_vm_execute.h:191)
==6951== by 0x823790C: execute (zend_vm_execute.h:87)
==6951== by 0x822019C: zend_execute_scripts (zend.c:1139)
==6951== by 0x81E959B: php_execute_script (main.c:2008)
==6951== by 0x8280E39: main (php_cli.c:1140)
==6951== Address 0x470E900 is 8 bytes inside a block of size 9
alloc'd
==6951== at 0x401A826: malloc (vg_replace_malloc.c:149)
==6951== by 0x449A33F: strdup (in /lib/i686/libc-2.3.2.so)
==6951== by 0x80F0ABD: zim_PDO_dbh_constructor (pdo_dbh.c:358)
==6951== by 0x82380AA: zend_do_fcall_common_helper_SPEC
(zend_vm_execute.h:191)
==6951== by 0x823790C: execute (zend_vm_execute.h:87)
==6951== by 0x822019C: zend_execute_scripts (zend.c:1139)
==6951== by 0x81E959B: php_execute_script (main.c:2008)
==6951== by 0x8280E39: main (php_cli.c:1140)
==6951==
==6951== Invalid read of size 4
==6951== at 0x40B1BC2: scramble (in
/usr/local/MySQL-5.0.45/lib/libmysqlclient.so.15)
==6951== by 0x40D654D: mysql_real_connect (in
/usr/local/MySQL-5.0.45/lib/libmysqlclient.so.15)
==6951== by 0x80F97AC: pdo_mysql_handle_factory
(mysql_driver.c:553)
==6951== by 0x80F0BE2: zim_PDO_dbh_constructor (pdo_dbh.c:372)
==6951== by 0x82380AA: zend_do_fcall_common_helper_SPEC
(zend_vm_execute.h:191)
==6951== by 0x823790C: execute (zend_vm_execute.h:87)
==6951== by 0x822019C: zend_execute_scripts (zend.c:1139)
==6951== by 0x81E959B: php_execute_script (main.c:2008)
==6951== by 0x8280E39: main (php_cli.c:1140)
==6951== Address 0x470E900 is 8 bytes inside a block of size 9
alloc'd
==6951== at 0x401A826: malloc (vg_replace_malloc.c:149)
==6951== by 0x449A33F: strdup (in /lib/i686/libc-2.3.2.so)
==6951== by 0x80F0ABD: zim_PDO_dbh_constructor (pdo_dbh.c:358)
==6951== by 0x82380AA: zend_do_fcall_common_helper_SPEC
(zend_vm_execute.h:191)
==6951== by 0x823790C: execute (zend_vm_execute.h:87)
==6951== by 0x822019C: zend_execute_scripts (zend.c:1139)
==6951== by 0x81E959B: php_execute_script (main.c:2008)
==6951== by 0x8280E39: main (php_cli.c:1140)
==6951==
==6951== Invalid read of size 4
==6951== at 0x40B15E1: scramble_323 (in
/usr/local/MySQL-5.0.45/lib/libmysqlclient.so.15)
==6951== by 0x40D66F3: mysql_real_connect (in
/usr/local/MySQL-5.0.45/lib/libmysqlclient.so.15)
==6951== by 0x80F97AC: pdo_mysql_handle_factory
(mysql_driver.c:553)
==6951== by 0x80F0BE2: zim_PDO_dbh_constructor (pdo_dbh.c:372)
==6951== by 0x82380AA: zend_do_fcall_common_helper_SPEC
(zend_vm_execute.h:191)
==6951== by 0x823790C: execute (zend_vm_execute.h:87)
==6951== by 0x822019C: zend_execute_scripts (zend.c:1139)
==6951== by 0x81E959B: php_execute_script (main.c:2008)
==6951== by 0x8280E39: main (php_cli.c:1140)
==6951== Address 0x470E900 is 8 bytes inside a block of size 9
alloc'd
==6951== at 0x401A826: malloc (vg_replace_malloc.c:149)
==6951== by 0x449A33F: strdup (in /lib/i686/libc-2.3.2.so)
==6951== by 0x80F0ABD: zim_PDO_dbh_constructor (pdo_dbh.c:358)
==6951== by 0x82380AA: zend_do_fcall_common_helper_SPEC
(zend_vm_execute.h:191)
==6951== by 0x823790C: execute (zend_vm_execute.h:87)
==6951== by 0x822019C: zend_execute_scripts (zend.c:1139)
==6951== by 0x81E959B: php_execute_script (main.c:2008)
==6951== by 0x8280E39: main (php_cli.c:1140)
------------------------------------------------------------------------
[2007-11-22 14:57:21] iliaa@php.net
Please try using this CVS snapshot:
http://snaps.php.net/php5.3-latest.tar.gz
For Windows (zip):
http://snaps.php.net/win32/php5.3-win32-latest.zip
For Windows (installer):
http://snaps.php.net/win32/php5.3-win32-installer-latest.msi
I've tried to replicate the problem, but for me valgrind reports no
errors.
------------------------------------------------------------------------
[2007-11-22 09:24:40] poletto at jeuxvideo dot com
Description:
------------
There were some crashes with 5.2.4 when using pdo, so i've tried out
5.2.5 that seems to have fixed this crashes.
Just to make sure there was no problem, i've tried to valgrind the
command line program on a simple script using pdo.
There are a few memory errors (this can make crashes occur).
Note that the leaks are due to the kernel 2.4 threads (so, ignore
them).
Reproduce code:
---------------
<?php
$dbh = new PDO('mysql:host=host;dbname=db', 'user', 'pass',
array(PDO::ATTR_PERSISTENT => true));
?>
Expected result:
----------------
No memory errors
Actual result:
--------------
Valgrind's output
> valgrind -q --leak-check=full --show-reachable=yes
/usr/local/src/php-5.2.5/sapi/cli/php test_pdo.php
==10313== Invalid read of size 4
==10313== at 0x40B29BD: my_strdup (in
/usr/local/MySQL-5.0.45/lib/libmysqlclient.so.15)
==10313== by 0x40D61D5: mysql_real_connect (in
/usr/local/MySQL-5.0.45/lib/libmysqlclient.so.15)
==10313== by 0x80F384C: pdo_mysql_handle_factory
(mysql_driver.c:553)
==10313== by 0x80EAC76: zim_PDO_dbh_constructor (pdo_dbh.c:372)
==10313== by 0x8237479: zend_do_fcall_common_helper_SPEC
(zend_vm_execute.h:200)
==10313== by 0x8236D44: execute (zend_vm_execute.h:92)
==10313== by 0x8220018: zend_execute_scripts (zend.c:1134)
==10313== by 0x81ED74F: php_execute_script (main.c:2004)
==10313== by 0x827A9B1: main (php_cli.c:1140)
==10313== Address 0x471F388 is 8 bytes inside a block of size 9
alloc'd
==10313== at 0x401A826: malloc (vg_replace_malloc.c:149)
==10313== by 0x449A33F: strdup (in /lib/i686/libc-2.3.2.so)
==10313== by 0x80EAB51: zim_PDO_dbh_constructor (pdo_dbh.c:358)
==10313== by 0x8237479: zend_do_fcall_common_helper_SPEC
(zend_vm_execute.h:200)
==10313== by 0x8236D44: execute (zend_vm_execute.h:92)
==10313== by 0x8220018: zend_execute_scripts (zend.c:1134)
==10313== by 0x81ED74F: php_execute_script (main.c:2004)
==10313== by 0x827A9B1: main (php_cli.c:1140)
==10313==
==10313== Invalid read of size 4
==10313== at 0x40B1BC2: scramble (in
/usr/local/MySQL-5.0.45/lib/libmysqlclient.so.15)
==10313== by 0x40D654D: mysql_real_connect (in
/usr/local/MySQL-5.0.45/lib/libmysqlclient.so.15)
==10313== by 0x80F384C: pdo_mysql_handle_factory
(mysql_driver.c:553)
==10313== by 0x80EAC76: zim_PDO_dbh_constructor (pdo_dbh.c:372)
==10313== by 0x8237479: zend_do_fcall_common_helper_SPEC
(zend_vm_execute.h:200)
==10313== by 0x8236D44: execute (zend_vm_execute.h:92)
==10313== by 0x8220018: zend_execute_scripts (zend.c:1134)
==10313== by 0x81ED74F: php_execute_script (main.c:2004)
==10313== by 0x827A9B1: main (php_cli.c:1140)
==10313== Address 0x471F388 is 8 bytes inside a block of size 9
alloc'd
==10313== at 0x401A826: malloc (vg_replace_malloc.c:149)
==10313== by 0x449A33F: strdup (in /lib/i686/libc-2.3.2.so)
==10313== by 0x80EAB51: zim_PDO_dbh_constructor (pdo_dbh.c:358)
==10313== by 0x8237479: zend_do_fcall_common_helper_SPEC
(zend_vm_execute.h:200)
==10313== by 0x8236D44: execute (zend_vm_execute.h:92)
==10313== by 0x8220018: zend_execute_scripts (zend.c:1134)
==10313== by 0x81ED74F: php_execute_script (main.c:2004)
==10313== by 0x827A9B1: main (php_cli.c:1140)
==10313==
==10313== Invalid read of size 4
==10313== at 0x40B15E1: scramble_323 (in
/usr/local/MySQL-5.0.45/lib/libmysqlclient.so.15)
==10313== by 0x40D66F3: mysql_real_connect (in
/usr/local/MySQL-5.0.45/lib/libmysqlclient.so.15)
==10313== by 0x80F384C: pdo_mysql_handle_factory
(mysql_driver.c:553)
==10313== by 0x80EAC76: zim_PDO_dbh_constructor (pdo_dbh.c:372)
==10313== by 0x8237479: zend_do_fcall_common_helper_SPEC
(zend_vm_execute.h:200)
==10313== by 0x8236D44: execute (zend_vm_execute.h:92)
==10313== by 0x8220018: zend_execute_scripts (zend.c:1134)
==10313== by 0x81ED74F: php_execute_script (main.c:2004)
==10313== by 0x827A9B1: main (php_cli.c:1140)
==10313== Address 0x471F388 is 8 bytes inside a block of size 9
alloc'd
==10313== at 0x401A826: malloc (vg_replace_malloc.c:149)
==10313== by 0x449A33F: strdup (in /lib/i686/libc-2.3.2.so)
==10313== by 0x80EAB51: zim_PDO_dbh_constructor (pdo_dbh.c:358)
==10313== by 0x8237479: zend_do_fcall_common_helper_SPEC
(zend_vm_execute.h:200)
==10313== by 0x8236D44: execute (zend_vm_execute.h:92)
==10313== by 0x8220018: zend_execute_scripts (zend.c:1134)
==10313== by 0x81ED74F: php_execute_script (main.c:2004)
==10313== by 0x827A9B1: main (php_cli.c:1140)
==10313==
==10313==
==10313== 28 bytes in 1 blocks are still reachable in loss record 1 of
4
==10313== at 0x401A826: malloc (vg_replace_malloc.c:149)
==10313== by 0x400B875: _dl_map_object_deps (in /lib/ld-2.3.2.so)
==10313== by 0x4532DBA: dl_open_worker (in /lib/i686/libc-2.3.2.so)
==10313== by 0x400C895: _dl_catch_error (in /lib/ld-2.3.2.so)
==10313== by 0x45329AE: _dl_open (in /lib/i686/libc-2.3.2.so)
==10313== by 0x45347C7: do_dlopen (in /lib/i686/libc-2.3.2.so)
==10313== by 0x400C895: _dl_catch_error (in /lib/ld-2.3.2.so)
==10313== by 0x453468D: __libc_dlopen_mode (in
/lib/i686/libc-2.3.2.so)
==10313== by 0x4512C30: __nss_lookup_function (in
/lib/i686/libc-2.3.2.so)
==10313== by 0x451287A: __nss_lookup (in /lib/i686/libc-2.3.2.so)
==10313== by 0x4514616: __nss_services_lookup (in
/lib/i686/libc-2.3.2.so)
==10313== by 0x4517C61: getservbyname_r@@GLIBC_2.1.2 (in
/lib/i686/libc-2.3.2.so)
==10313==
==10313==
==10313== 68 bytes in 1 blocks are possibly lost in loss record 2 of 4
==10313== at 0x401BC54: calloc (vg_replace_malloc.c:279)
==10313== by 0x400EBE8: _dl_allocate_tls_storage (in
/lib/ld-2.3.2.so)
==10313== by 0x400EDD8: _dl_allocate_tls (in /lib/ld-2.3.2.so)
==10313== by 0x43D756B: __pthread_initialize_minimal (in
/lib/i686/libpthread-0.10.so)
==10313== by 0x43D4205: (within /lib/i686/libpthread-0.10.so)
==10313== by 0x43D3C52: (within /lib/i686/libpthread-0.10.so)
==10313== by 0x400CC51: _dl_init (in /lib/ld-2.3.2.so)
==10313== by 0x4000C5C: (within /lib/ld-2.3.2.so)
==10313==
==10313==
==10313== 520 bytes in 1 blocks are still reachable in loss record 3 of
4
==10313== at 0x401BC54: calloc (vg_replace_malloc.c:279)
==10313== by 0x400EAF7: _dl_tls_setup (in /lib/ld-2.3.2.so)
==10313== by 0x43D755C: __pthread_initialize_minimal (in
/lib/i686/libpthread-0.10.so)
==10313== by 0x43D4205: (within /lib/i686/libpthread-0.10.so)
==10313== by 0x43D3C52: (within /lib/i686/libpthread-0.10.so)
==10313== by 0x400CC51: _dl_init (in /lib/ld-2.3.2.so)
==10313== by 0x4000C5C: (within /lib/ld-2.3.2.so)
==10313==
==10313==
==10313== 1,288 bytes in 1 blocks are possibly lost in loss record 4 of
4
==10313== at 0x401BE0C: memalign (vg_replace_malloc.c:332)
==10313== by 0x400EBA1: _dl_allocate_tls_storage (in
/lib/ld-2.3.2.so)
==10313== by 0x400EDD8: _dl_allocate_tls (in /lib/ld-2.3.2.so)
==10313== by 0x43D756B: __pthread_initialize_minimal (in
/lib/i686/libpthread-0.10.so)
==10313== by 0x43D4205: (within /lib/i686/libpthread-0.10.so)
==10313== by 0x43D3C52: (within /lib/i686/libpthread-0.10.so)
==10313== by 0x400CC51: _dl_init (in /lib/ld-2.3.2.so)
==10313== by 0x4000C5C: (within /lib/ld-2.3.2.so)
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=43371&edit=1
Thread (7 messages)