Edit report at http://bugs.php.net/bug.php?id=53716&edit=1
ID: 53716
User updated by: anthon dot pang at gmail dot com
Reported by: anthon dot pang at gmail dot com
Summary: segfault in $stmt->execute()
-Status: Feedback
+Status: Open
Type: Bug
Package: PDO related
Operating System: Ubuntu 10.04
PHP Version: 5.3.5
Block user comment: N
Private report: N
New Comment:
I'm in the middle of a project. For reference, the segfault occurs in
r3717:
http://dev.piwik.org/trac/changeset/3717/trunk?old_path=%2F&format=zip
Please keep this ticket open until I have some free time to troubleshoot
and isolate a smaller test case. (I can already tell you it'll require
database access and be more than the arbitrary 20 line limit.)
Additional info:
Same code doesn't crash when using MYSQLI or php 5.2.17.
(Tested/segfaulted with 5.3.2, 5.3.3, 5.3.4, and 5.3.5. These are all
vanilla builds using source downloads from php.net.)
Previous Comments:
------------------------------------------------------------------------
[2011-01-12 12:00:33] pajoye@php.net
Thank you for this bug report. To properly diagnose the problem, we
need a short but complete example script to be able to reproduce
this bug ourselves.
A proper reproducing script starts with <?php and ends with ?>,
is max. 10-20 lines long and does not require any external
resources such as databases, etc. If the script requires a
database to demonstrate the issue, please make sure it creates
all necessary tables, stored procedures etc.
Please avoid embedding huge scripts into the report.
------------------------------------------------------------------------
[2011-01-12 07:27:41] anthon dot pang at gmail dot com
Description:
------------
The snippet of code shown used is a method from a class that subclasses
Zend_Db_Adapter_Abstract. We make a lot of query() calls, so caching
prepared statements reportedly gives us a 10% performance improvement.
#! /bin/sh
#
# Created by configure
'./configure' \
'--with-mysqli=mysqlnd' \
'--with-pdo-mysql=mysqlnd' \
'--with-zlib' \
'--enable-zip' \
'--with-gd' \
'--with-curl' \
'--enable-mbstring' \
'--enable-debug' \
"$@"
Test script:
---------------
public function query($sql, $bind = array())
{
static $cachePreparedStatement = array();
if(isset($cachePreparedStatement[$sql]))
{
if (!is_array($bind)) {
$bind = array($bind);
}
$stmt = $cachePreparedStatement[$sql];
$stmt->execute($bind);
return $stmt;
}
$stmt = parent::query($sql, $bind);
$cachePreparedStatement[$sql] = $stmt;
return $stmt;
}
Expected result:
----------------
No crash.
Actual result:
--------------
Program received signal SIGSEGV, Segmentation fault.
0x003c7816 in ?? () from /lib/tls/i686/cmov/libc.so.6
(gdb) bt
#0 0x003c7816 in ?? () from /lib/tls/i686/cmov/libc.so.6
#1 0x082818c6 in do_fetch (stmt=0x99cb938, do_bind=1,
return_value=0x8f5c78c,
how=PDO_FETCH_ASSOC, ori=PDO_FETCH_ORI_NEXT, offset=0,
return_all=0x0)
at /home/apang/work/php/php-5.3.5/ext/pdo/pdo_stmt.c:1044
#2 0x082825a2 in zim_PDOStatement_fetch (ht=3, return_value=0x8f5c78c,
return_value_ptr=0x0, this_ptr=0xb7ecba54, return_value_used=1)
at /home/apang/work/php/php-5.3.5/ext/pdo/pdo_stmt.c:1316
#3 0x08501e58 in zend_do_fcall_common_helper_SPEC
(execute_data=0x8bd0dc0)
at /home/apang/work/php/php-5.3.5/Zend/zend_vm_execute.h:316
#4 0x08502415 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0x8bd0dc0)
at /home/apang/work/php/php-5.3.5/Zend/zend_vm_execute.h:421
#5 0x085014f5 in execute (op_array=0x971d190)
at /home/apang/work/php/php-5.3.5/Zend/zend_vm_execute.h:107
#6 0x084c6e07 in zend_call_function (fci=0xbfffce28,
fci_cache=0xbfffce4c)
at /home/apang/work/php/php-5.3.5/Zend/zend_execute_API.c:964
#7 0x083849e1 in zif_call_user_func_array (ht=2,
return_value=0x9a03db0,
return_value_ptr=0x0, this_ptr=0x0, return_value_used=0)
at
/home/apang/work/php/php-5.3.5/ext/standard/basic_functions.c:4796
#8 0x08501e58 in zend_do_fcall_common_helper_SPEC
(execute_data=0x8bcffdc)
at /home/apang/work/php/php-5.3.5/Zend/zend_vm_execute.h:316
#9 0x08505918 in ZEND_DO_FCALL_SPEC_CONST_HANDLER
(execute_data=0x8bcffdc)
at /home/apang/work/php/php-5.3.5/Zend/zend_vm_execute.h:1606
#10 0x085014f5 in execute (op_array=0x8e7bd1c)
---Type <return> to continue, or q <return> to quit---
at /home/apang/work/php/php-5.3.5/Zend/zend_vm_execute.h:107
#11 0x084d488e in zend_execute_scripts (type=8, retval=0x0,
file_count=3)
at /home/apang/work/php/php-5.3.5/Zend/zend.c:1194
#12 0x0846a4ee in php_execute_script (primary_file=0xbffff2e4)
at /home/apang/work/php/php-5.3.5/main/main.c:2265
#13 0x08592c71 in main (argc=2, argv=0xbffff474)
at /home/apang/work/php/php-5.3.5/sapi/cli/php_cli.c:1193
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/bug.php?id=53716&edit=1