From: joh at deworks dot net
Operating system: Linux
PHP version: 5CVS-2005-11-19 (snap)
PHP Bug Type: PDO related
Bug description: PDO segfaults when using persistent connections
Description:
------------
PDO segfaults on any pdo_stmt_instantiate when using persistent
connections.
Reproduce code:
---------------
<?php
$dsn = '...';
$user = '...';
$pass = '...';
$options = array(PDO::ATTR_PERSISTENT => true);
$db = new PDO($dsn, $user, $pass, $options);
$sql = 'SELECT * FROM some_table';
$result = $db->query($sql);
echo "Query OK";
?>
Expected result:
----------------
Query OK
Actual result:
--------------
Segmentation fault
GDB backtrace:
#0 _object_and_properties_init (arg=0x8599b0c, class_type=0x0,
properties=0x0,
tsrm_ls=0x8439018) at
/shared/src/php/php5-200511191330/Zend/zend_API.c:818
#1 0x0829ba79 in _object_init_ex (arg=0x8599b0c, class_type=0x0,
tsrm_ls=0x8439018) at
/shared/src/php/php5-200511191330/Zend/zend_API.c:843
#2 0x081316c0 in pdo_stmt_instantiate (dbh=0x8599c08, object=0x8599b0c,
dbstmt_ce=Variable "dbstmt_ce" is not available.
) at /shared/src/php/php5-200511191330/ext/pdo/pdo_dbh.c:418
#3 0x08133d11 in zif_PDO_query (ht=1, return_value=0x8599b0c,
return_value_ptr=0x0, this_ptr=0x8599a84, return_value_used=1,
tsrm_ls=0x8439018) at
/shared/src/php/php5-200511191330/ext/pdo/pdo_dbh.c:971
#4 0x082be00e in zend_do_fcall_common_helper_SPEC
(execute_data=0xbfdfd24c,
tsrm_ls=0x8439018) at zend_vm_execute.h:188
#5 0x082bd5fa in execute (op_array=0x8595184, tsrm_ls=0x8439018)
at zend_vm_execute.h:88
#6 0x0829893e in zend_execute_scripts (type=8, tsrm_ls=0x8439018,
retval=Variable "retval" is not available.
)
at /shared/src/php/php5-200511191330/Zend/zend.c:1090
#7 0x0825af0a in php_execute_script (primary_file=0xbfdff64c,
tsrm_ls=0x8439018)
at /shared/src/php/php5-200511191330/main/main.c:1704
#8 0x08332867 in main (argc=2, argv=0xbfdff734)
at /shared/src/php/php5-200511191330/sapi/cli/php_cli.c:1039
It seems that the dbh returned by zend_object_store_get_object(getThis()
TSRMLS_CC); does not contain a valid def_stmt_ce when using persistent
connections. _object_and_properties_init then segfaults when being passed
a null-pointer as the class_type argument.
My guess is an error in the dbh_constructor function, though I'm not sure
as I don't know how the inner details of PHP/PDO. If the connection is
persistent, dbh_constructor allocates a brand new pdo_dbh_t (pdbh)
structure without pointing pdbh->def_stmt_ce to the one pointed to by the
old dbh (dbh).
Hope you can figure this out :)
--
Edit bug report at http://bugs.php.net/?id=35293&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=35293&r=trysnapshot4
Try a CVS snapshot (php5.0):
http://bugs.php.net/fix.php?id=35293&r=trysnapshot50
Try a CVS snapshot (php5.1):
http://bugs.php.net/fix.php?id=35293&r=trysnapshot51
Fixed in CVS: http://bugs.php.net/fix.php?id=35293&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=35293&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=35293&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=35293&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=35293&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=35293&r=support
Expected behavior: http://bugs.php.net/fix.php?id=35293&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=35293&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=35293&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=35293&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=35293&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=35293&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=35293&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=35293&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=35293&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=35293&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=35293&r=mysqlcfg
