ID: 49098
Updated by: t...@php.net
Reported By: bugs at timj dot co dot uk
Status: Open
Bug Type: Session related
Operating System: Linux
PHP Version: 5.2.10
New Comment:
Breakpoint 1, php_mysqli_set_error (mysql_errno=0, mysql_err=0xbd1f77
"")
at /path/to/php5.2-200911070930/ext/mysqli/mysqli.c:1001
Previous Comments:
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[2009-11-11 23:14:25] ras...@php.net
Could you set a gdb breakpoint on the php_mysqli_set_error call and
show the arguments passed to it?
I still don't see anything in the code around that part that would
cause this though. It feels like something else is stepping on global
memory here, but it is too consistent to be random memory corruption.
Would be nice if someone else could reproduce it.
------------------------------------------------------------------------
[2009-11-11 23:01:13] t...@php.net
Yep. Also checked on 5.2, just in case.
Here's some valgrind from 5.3 for info:
==17517== Invalid free() / delete / delete[]
==17517== at 0x4A0633D: free (vg_replace_malloc.c:323)
==17517== by 0xABA17B9: php_mysqli_set_error (mysqli.c:1004)
==17517== by 0xABA61DD: zif_mysqli_real_connect (mysqli_api.c:1476)
==17517== by 0x656BD2: zend_do_fcall_common_helper_SPEC
(zend_vm_execute.h:200)
==17517== by 0x652AFB: execute (zend_vm_execute.h:92)
==17517== by 0x656545: zend_do_fcall_common_helper_SPEC
(zend_vm_execute.h:234)
==17517== by 0x652AFB: execute (zend_vm_execute.h:92)
==17517== by 0x656545: zend_do_fcall_common_helper_SPEC
(zend_vm_execute.h:234)
==17517== by 0x652AFB: execute (zend_vm_execute.h:92)
==17517== by 0x656545: zend_do_fcall_common_helper_SPEC
(zend_vm_execute.h:234)
==17517== by 0x652AFB: execute (zend_vm_execute.h:92)
==17517== by 0x656545: zend_do_fcall_common_helper_SPEC
(zend_vm_execute.h:234)
==17517== Address 0xba0af20 is 0 bytes inside a block of size 1
free'd
==17517== at 0x4A0633D: free (vg_replace_malloc.c:323)
==17517== by 0xABA1348: zm_deactivate_mysqli (mysqli.c:711)
==17517== by 0x63165B: module_registry_cleanup (zend_API.c:1976)
==17517== by 0x63A3B3: zend_hash_reverse_apply (zend_hash.c:755)
==17517== by 0x6301EC: zend_deactivate_modules (zend.c:838)
==17517== by 0x5ED964: php_request_shutdown (main.c:1475)
==17517== by 0x6A065B: main (php_cli.c:1343)
==17517==
------------------------------------------------------------------------
[2009-11-11 22:50:47] j...@php.net
What's the valgrind output then, same as before?
------------------------------------------------------------------------
[2009-11-11 22:48:14] t...@php.net
Reverting the change from r281844 doesn't seem to fix it (tested on
5.3-snap200911111930)
------------------------------------------------------------------------
[2009-11-11 20:41:46] t...@php.net
Yes it still segfaults in the same way in 5.3-snap200911111930.
Essentially the same valgrind output.
Going back to the original issue, it started happening in 5.2.10. A
diff of the "mysqli" directory between 5.2.9 and 5.2.10 shows only one
change: mysqli_api.c in SVN r281844.
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