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Bug #32226 I get segmentation fault (mis?)using set_exception_handler
Submitted: 2005-03-07 20:02 UTC Modified: 2005-03-07 20:35 UTC
From: michael at zend dot com Assigned: helly (profile)
Status: Closed Package: Scripting Engine problem
PHP Version: 5CVS-2005-03-07 OS: *
Private report: No CVE-ID: None
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 [2005-03-07 20:02 UTC] michael at zend dot com 
Description:
------------
I get segmentation fault, when running the following code:

Reproduce code:
---------------
<?

class A
{
        public function A()
        {
                set_exception_handler(array($this, 'EH'));

                throw new Exception();
        }

        public function EH()
        {
                restore_exception_handler();

                throw new Exception();
        }
}

$a = new A();

?>


Expected result:
----------------
Something better, than Segfault ;)

Actual result:
--------------
Segmentation fault (core dumped)

......

#0  zend_hash_merge_ex (target=0x83064f8, source=0x98, pCopyConstructor=0x81d9750 <zval_add_ref>, size=4, 
    pMergeSource=0x81cb9e0 <do_inherit_constant_check>, pParam=0x0)
    at /home/michael/phprepos/php-src/Zend/zend_hash.c:818
818         p = source->pListHead;
(gdb) bt
#0  zend_hash_merge_ex (target=0x83064f8, source=0x98, pCopyConstructor=0x81d9750 <zval_add_ref>, size=4, 
    pMergeSource=0x81cb9e0 <do_inherit_constant_check>, pParam=0x0)
    at /home/michael/phprepos/php-src/Zend/zend_hash.c:818
#1  0x081cba99 in zend_do_implement_interface (ce=0x8306460, iface=0x0)
    at /home/michael/phprepos/php-src/Zend/zend_compile.c:2096
#2  0x081de8d9 in zend_class_implements (class_entry=0x8306460, num_interfaces=2)
    at /home/michael/phprepos/php-src/Zend/zend_API.c:1650
#3  0x080fa120 in zm_startup_sqlite (type=1, module_number=4)
    at /home/michael/phprepos/php-src/ext/sqlite/sqlite.c:1018
#4  0x081dd858 in zend_register_module_ex (module=0x83037f0) at /home/michael/phprepos/php-src/Zend/zend_API.c:1227
#5  0x081a3ba0 in php_startup_extensions (ptr=0x82bc4ac, count=152) at /home/michael/phprepos/php-src/main/main.c:1267
#6  0x0825da5b in php_startup_internal_extensions () at main/internal_functions_cli.c:74
#7  0x081a4170 in php_module_startup (sf=0x0, additional_modules=0x0, num_additional_modules=152)
    at /home/michael/phprepos/php-src/main/main.c:1450
#8  0x0825c9ce in main (argc=3, argv=0xbffffa44) at /home/michael/phprepos/php-src/sapi/cli/php_cli.c:622

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 [2005-03-07 20:31 UTC] helly@php.net 
The problem is that after throwing the exception the instance immediatley gets destructed. Thus the target for the handler is no longer available.
 [2005-03-07 20:35 UTC] helly@php.net 
This bug has been fixed in CVS.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
 
Thank you for the report, and for helping us make PHP better.

This seems to be a 5.1-dev only thing. Still i MFHed the fix to prevent from MFHing it with some other stuff later.
 
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