| Bug #20201 | Segmentation fault on maxdb_query in PHP | ||
|---|---|---|---|
| Submitted: | 1 Jun 2006 13:17 | Modified: | 22 Nov 2006 8:38 |
| Reporter: | [ name withheld ] | Email Updates: | |
| Status: | No Feedback | Impact on me: | |
| Category: | MaxDB | Severity: | S1 (Critical) |
| Version: | 7.6.00.27 | OS: | Linux (Linux) |
| Assigned to: | CPU Architecture: | Any | |
[1 Jun 2006 17:24]
C.J. Adams-Collier
Hey there! Can you start by giving me the query you are issuing? It would be great if you could create a very simple .php script to exercise the bug. Just enough to cause the segfault. Thanks! C.J.
[2 Jun 2006 11:38]
[ name withheld ]
Try to use maxdb_free_result 2 times and one of them should be in class destructor. For ex.:
class A
{
private $res;
function __destruct()
{
$this->do_something();
}
function do_something()
{
if ($this->res)
maxdb_free_result($res);
}
}
$b = new A();
$b->do_something();
We fixed this by adding $this->res = null after maxdb_free_result();
[22 Oct 2006 8:38]
Valeriy Kravchuk
Please, try to repeat with a newer version, 7.6.00.34, and inform about the results.
[23 Nov 2006 0:00]
Bugs System
No feedback was provided for this bug for over a month, so it is being suspended automatically. If you are able to provide the information that was originally requested, please do so and change the status of the bug back to "Open".
Description: Hello! I have troubles with your MaxDB SQLDBC library. PHP segfaults on maxdb_query, but not on all queries. Most of all queries are executed fine. PHP 5.1.4 backtrace Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 1082918144 (LWP 22263)] 0x401cc47a in IFR_ErrorHndl::clear () from /opt/sdb/programs/lib/libSQLDBC_C.so (gdb) bt #0 0x401cc47a in IFR_ErrorHndl::clear () from /opt/sdb/programs/lib/libSQLDBC_C.so #1 0x4017e47a in IFR_ResultSet::close () from /opt/sdb/programs/lib/libSQLDBC_C.so #2 0x40112da2 in SQLDBC::SQLDBC_ResultSet::close () from /opt/sdb/programs/lib/libSQLDBC_C.so #3 0x4010f4dd in SQLDBC_ResultSet_close () from /opt/sdb/programs/lib/libSQLDBC_C.so #4 0x08133ba0 in zif_maxdb_free_result (ht=1, return_value=0x87a88d4, return_value_ptr=0x0, this_ptr=0x0, return_value_used=0) at /tmp/php-5.1.4/ext/maxdb/php_maxdb.c:5413 #5 0x0829016b in zend_do_fcall_common_helper_SPEC (execute_data=0xbfffc9e0) at zend_vm_execute.h:200 #6 0x0828fa49 in execute (op_array=0x87a38dc) at zend_vm_execute.h:92 #7 0x0828ff63 in zend_do_fcall_common_helper_SPEC (execute_data=0xbfffcab0) at zend_vm_execute.h:234 #8 0x0828fa49 in execute (op_array=0x87a376c) at zend_vm_execute.h:92 #9 0x0826eaa1 in zend_call_function (fci=0xbfffcc00, fci_cache=0xbfffcbe0) at /tmp/php-5.1.4/Zend/zend_execute_API.c:938 #10 0x08287754 in zend_call_method (object_pp=0xbfffcc8c, obj_ce=0x87a873c, fn_proxy=0x87a882c, function_name=0x849a8ac "__destruct", function_name_len=10, retval_ptr_ptr=0x0, param_count=142038348, arg1=0x0, arg2=0x0) at /tmp/php-5.1.4/Zend/zend_interfaces.c:88 #11 0x0828b904 in zend_objects_destroy_object (object=0x8789184, handle=142038348) at /tmp/php-5.1.4/Zend/zend_objects.c:98 #12 0x0828e1ef in zend_objects_store_del_ref (zobject=0x87a2c1c) at /tmp/php-5.1.4/Zend/zend_objects_API.c:166 #13 0x0827720f in _zval_dtor_func (zvalue=0x87a2c1c) at /tmp/php-5.1.4/Zend/zend_variables.c:52 #14 0x0826dd89 in _zval_ptr_dtor (zval_ptr=0x8789118) at zend_variables.h:35 #15 0x0827fd79 in zend_hash_clean (ht=0x87752b4) at /tmp/php-5.1.4/Zend/zend_hash.c:547 #16 0x0828fff6 in zend_do_fcall_common_helper_SPEC (execute_data=0xbfffd320) at zend_vm_execute.h:255 #17 0x0828fa49 in execute (op_array=0x8770fdc) at zend_vm_execute.h:92 #18 0x08278b4a in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /tmp/php-5.1.4/Zend/zend.c:1109 #19 0x08242dfd in php_execute_script (primary_file=0xbffff720) at /tmp/php-5.1.4/main/main.c:1732 #20 0x082da4c9 in main (argc=2, argv=0xbffff7f4) at /tmp/php-5.1.4/sapi/cli/php_cli.c:1092 How to repeat: Try to use maxdb_query with different queries. In most of cases it works fine, but in some case it segfaults. Maybe it's a buggy combinations of requests or something else. I've used it within php-class. Maybe it helps.