ID: 24659
Updated by: [EMAIL PROTECTED]
-Summary: Segmentation fault: xml_set_*_handler with object
reference
Reported By: fujimura at wakhok dot ac dot jp
-Status: Open
+Status: Verified
-Bug Type: XML related
+Bug Type: Zend Engine 2 problem
Operating System: Linux kernel-2.4.21
PHP Version: 5.0.0b2-dev
New Comment:
The first script (that xml thing) does this after some reloads:
Warning: xml_set_default_handler(): supplied resource is not a valid
XML Parser resource in /www/apache-1.3.27/htdocs/exep.php on line 13
Warning: xml_parser_free(): supplied resource is not a valid XML Parser
resource in /www/apache-1.3.27/htdocs/exep.php on line 15
Warning: Unknown list entry type in request shutdown (135138372) in
Unknown on line 0
Given enough requests, (ab -n 1000 http://localhost/bug24658_a.php), it
crashes:
[Switching to Thread 1024 (runnable)]
0x4042e1fd in zend_objects_destroy_object (object=0x80e907c, handle=1)
at /usr/src/web/php/php5/Zend/zend_objects.c:36
36 zend_function *destructor = object->ce->destructor;
(gdb) bt
#0 0x4042e1fd in zend_objects_destroy_object (object=0x80e907c,
handle=1)
at /usr/src/web/php/php5/Zend/zend_objects.c:36
#1 0x40430855 in zend_objects_store_del_ref (zobject=0x80e0f9c) at
/usr/src/web/php/php5/Zend/zend_objects_API.c:142
#2 0x4041fccc in _zval_dtor (zvalue=0x80e0f9c) at
/usr/src/web/php/php5/Zend/zend_variables.c:61
#3 0x40417389 in _zval_ptr_dtor (zval_ptr=0x80ecff0) at
/usr/src/web/php/php5/Zend/zend_execute_API.c:344
#4 0x40426be8 in zend_hash_destroy (ht=0x404a6990) at
/usr/src/web/php/php5/Zend/zend_hash.c:509
#5 0x40416f55 in shutdown_executor () at
/usr/src/web/php/php5/Zend/zend_execute_API.c:211
#6 0x40421257 in zend_deactivate () at
/usr/src/web/php/php5/Zend/zend.c:795
#7 0x403ee8e6 in php_request_shutdown (dummy=0x0) at
/usr/src/web/php/php5/main/main.c:1174
#8 0x4045c0d5 in apache_php_module_main (r=0x81bf684,
display_source_mode=0)
at /usr/src/web/php/php5/sapi/apache/sapi_apache.c:60
#9 0x4045cd00 in send_php (r=0x81bf684, display_source_mode=0,
filename=0x0)
at /usr/src/web/php/php5/sapi/apache/mod_php5.c:621
#10 0x4045cd6a in send_parsed_php (r=0x81bf684) at
/usr/src/web/php/php5/sapi/apache/mod_php5.c:636
#11 0x8054f09 in ap_invoke_handler ()
#12 0x806b0cf in process_request_internal ()
#13 0x806b13a in ap_process_request ()
#14 0x8061916 in child_main ()
#15 0x8061af5 in make_child ()
#16 0x8061c76 in startup_children ()
#17 0x806230d in standalone_main ()
#18 0x8062b9c in main ()
#19 0x4016c9cb in __libc_start_main (main=0x80627d8 <main>, argc=3,
argv=0xbffff6b4, init=0x804ed2c <_init>,
fini=0x8082e64 <_fini>, rtld_fini=0x4000aea0 <_dl_fini>,
stack_end=0xbffff6ac)
at ../sysdeps/generic/libc-start.c:92
Previous Comments:
------------------------------------------------------------------------
[2003-07-16 20:56:28] fujimura at wakhok dot ac dot jp
> Backtrace is useless as long as you don't have
> --enable-debug in your configure line.
Okay, I rebuilt PHP with --enable-debug, but this bug did not
reproduce.
And next, I did again without --enable-debug, this bug reproduced.
I have discovered that set_exception_handler() causes this one too.
<?php
set_exception_handler("test_func");
function test_func($exception) {
var_dump($exception);
exit;
}
throw new Exception();
print "A";
?>
I cannot understand. The debug codes of Zend causes with this?
What can I do?
> Also include the full configure line you used.
./configure \
--with-apxs=/usr/local/apache/bin/apxs \
--disable-short-tags \
--enable-versioning \
--enable-mbstring \
--enable-mbregex \
--enable-dom \
--with-iconv \
--with-xsl \
--with-openssl \
--with-zlib \
--with-bz2
...and --enable-debug
------------------------------------------------------------------------
[2003-07-16 03:54:01] [EMAIL PROTECTED]
Backtrace is useless as long as you don't have
--enable-debug in your configure line.
So add it, and put new backtrace here.
Also include the full configure line you used.
------------------------------------------------------------------------
[2003-07-15 04:16:58] fujimura at wakhok dot ac dot jp
-$parser AND die;
+$parser OR die;
;-)
------------------------------------------------------------------------
[2003-07-15 04:15:16] fujimura at wakhok dot ac dot jp
Description:
------------
The following code crashes(segmentation fault, and empty output) at a
whim.
But it does not reproduce when php invoked as CLI.
Reproduce code:
---------------
<?php
class MyHandler {
public function test($parser, $data) {
print $data;
}
}
$parser = xml_parser_create();
$parser AND die;
$handler = new MyHandler();
xml_set_default_handler($parser, array($handler, "test"));
xml_parser_free($parser);
?>
Expected result:
----------------
Nothing.
Actual result:
--------------
SIGSEGV logged to error_log.
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=24659&edit=1
