ID: 47724
Comment by: scott at danielfamily dot com
Reported By: scott at danielfamily dot com
Status: Feedback
Bug Type: Reproducible crash
Operating System: Centos 5.2
PHP Version: 5.2.9
New Comment:
I believe very strongly that this is a bug in PHP, not in doctrine or
symfony. Modifying seemingly random and benign pieces of code, changing
the order of code, or collapsing classes usually results in the problem
disappearing. This makes it impossible to comply with your request for a
simple script.
This is VERY likely to be a corrupt heap situation that only manifests
itself when the planets are aligned correctly. I have gotten those
planets to align consistently and the crash always happens.
I'm willing to do anything reasonable to get someone to look at this
problem. Building the VMWARE appliance seemed like the best approach as
it will allow someone familiar with the internals of PHP to download the
appliance and duplicate the problem in minutes.
I've already posted this on the symfony forums and gotten sympathy, but
no substitive suggestions. I'll try posting it as a symfony bug and see
what happens.
Previous Comments:
------------------------------------------------------------------------
[2009-03-22 18:00:09] paj...@php.net
If you are not able to create a self contained script to reproduce the
problem, report the bug to symfony or doctrine developers and ask them
to analyze it. We can't use these tools as a base to debug this issue.
Thanks for your understanding.
------------------------------------------------------------------------
[2009-03-22 17:38:55] scott at danielfamily dot com
I understand and appreciate the purpose of the canned response, but
please reread my original bug submission. What you are asking for is
impossible. Duplication of the problem REQUIRES a very complex sequence
of PHP code. If I change a single line of PHP code, the problem is
likely to disappear.
Please take me up on my offer to transfer the VMWARE appliance that
clearly and consistently duplicates the problem.
------------------------------------------------------------------------
[2009-03-21 23:03:13] j...@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.
------------------------------------------------------------------------
[2009-03-20 02:29:47] scott at danielfamily dot com
Description:
------------
Sorry for the longer than asked for initial post, but I've spent many
many hours profiling this problem to make this bug report.
Our project uses symfony framework with the doctrine database
abstraction. We have had a number of crash sequences that are VERY hard
to simplify and usually crash intermittently. I have isolated an
instance that always crashes on our linux systems and usually crashes
under windows.
If I change the order of code or add code, the problem may disappear
temporarily only to resurface later after additional code modification
have been made. I've done this several times, but have no confidence in
deploying this kind of fix in a final released product.
After many many hours, I've built a vmware appliance with Centos 5.2
and the LAMP stack installed. It was built using the latest Apache and
PHP source. It is built using the enable-debug switch and I've gotten a
stack trace (included below).
Running the vmware appliance and hitting a single url running from it's
server causes the error every time.
If someone is assigned to this problem and communicates with me, I can
send them the vmware appliance to run under windows. It is already setup
with the software stack to reproduce and debug the problem. It should
save many hours of configuration (at least it would for me).
I believe that it is very possible this related to Bug #40479.
Unfortunately, I have some experience with this problem with another
project and believe it is a very serious unresolved issue.
Actual result:
--------------
[r...@localhost bin]# gdb /usr/local/apache2/bin/httpd
GNU gdb Red Hat Linux (6.5-37.el5_2.2rh)
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and
you are
welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for
details.
This GDB was configured as "i386-redhat-linux-gnu"...Using host
libthread_db library "/lib/libthread_db.so.1".
(gdb) run -X
Starting program: /usr/local/apache2/bin/httpd -X
[Thread debugging using libthread_db enabled]
[New Thread -1208129792 (LWP 22085)]
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1208129792 (LWP 22085)]
0x01146ab9 in zend_if_strlen (ht=1, return_value=0xa682b40,
return_value_ptr=0x0, this_ptr=0x0,
return_value_used=1) at
/root/Desktop/php-5.2.9/Zend/zend_builtin_functions.c:286
286 RETVAL_LONG(Z_STRLEN_PP(str));
(gdb) bt
#0 0x01146ab9 in zend_if_strlen (ht=1, return_value=0xa682b40,
return_value_ptr=0x0,
this_ptr=0x0, return_value_used=1) at
/root/Desktop/php-5.2.9/Zend/zend_builtin_functions.c:286
#1 0x0115cc34 in zend_do_fcall_common_helper_SPEC
(execute_data=0xbf826c24)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:200
#2 0x01162706 in ZEND_DO_FCALL_SPEC_CONST_HANDLER
(execute_data=0xbf826c24)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:1729
#3 0x0115c795 in execute (op_array=0xa6715f8) at
/root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#4 0x0115cdae in zend_do_fcall_common_helper_SPEC
(execute_data=0xbf826de4)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:234
#5 0x0115d888 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0xbf826de4)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:322
#6 0x0115c795 in execute (op_array=0xb7d92f88)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#7 0x0115cdae in zend_do_fcall_common_helper_SPEC
(execute_data=0xbf8270b4)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:234
#8 0x0115d888 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0xbf8270b4)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:322
#9 0x0115c795 in execute (op_array=0xa47e408) at
/root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#10 0x0115cdae in zend_do_fcall_common_helper_SPEC
(execute_data=0xbf827434)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:234
#11 0x0115d888 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0xbf827434)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:322
#12 0x0115c795 in execute (op_array=0xb7d8bd58)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#13 0x0119df6a in ZEND_INCLUDE_OR_EVAL_SPEC_CV_HANDLER
(execute_data=0xbf827734)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:20117
#14 0x0115c795 in execute (op_array=0xb7d7d784)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#15 0x0115cdae in zend_do_fcall_common_helper_SPEC
(execute_data=0xbf827e64)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:234
#16 0x0115d888 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0xbf827e64)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:322
#17 0x0115c795 in execute (op_array=0xb7d69dc0)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#18 0x0115cdae in zend_do_fcall_common_helper_SPEC
(execute_data=0xbf828274)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:234
#19 0x0115d888 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0xbf828274)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:322
#20 0x0115c795 in execute (op_array=0xa403ce0) at
/root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#21 0x0115cdae in zend_do_fcall_common_helper_SPEC
(execute_data=0xbf8283e4)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:234
#22 0x0115d888 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0xbf8283e4)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:322
#23 0x0115c795 in execute (op_array=0xa403c18) at
/root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#24 0x0115cdae in zend_do_fcall_common_helper_SPEC
(execute_data=0xbf8285e4)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:234
#25 0x01162706 in ZEND_DO_FCALL_SPEC_CONST_HANDLER
(execute_data=0xbf8285e4)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:1729
#26 0x0115c795 in execute (op_array=0xb7d76d80)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#27 0x0119df6a in ZEND_INCLUDE_OR_EVAL_SPEC_CV_HANDLER
(execute_data=0xbf8288e4)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:20117
#28 0x0115c795 in execute (op_array=0xb7d7d784)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#29 0x0115cdae in zend_do_fcall_common_helper_SPEC
(execute_data=0xbf829014)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:234
#30 0x0115d888 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0xbf829014)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:322
#31 0x0115c795 in execute (op_array=0xb7d69dc0)
---Type <return> to continue, or q <return> to quit---
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#32 0x0115cdae in zend_do_fcall_common_helper_SPEC
(execute_data=0xbf829424)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:234
#33 0x0115d888 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0xbf829424)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:322
#34 0x0115c795 in execute (op_array=0xa403ce0) at
/root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#35 0x0115cdae in zend_do_fcall_common_helper_SPEC
(execute_data=0xbf829594)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:234
#36 0x0115d888 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0xbf829594)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:322
#37 0x0115c795 in execute (op_array=0xa403c18) at
/root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#38 0x0115cdae in zend_do_fcall_common_helper_SPEC
(execute_data=0xbf8297d4)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:234
#39 0x01162706 in ZEND_DO_FCALL_SPEC_CONST_HANDLER
(execute_data=0xbf8297d4)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:1729
#40 0x0115c795 in execute (op_array=0xb7d678ac)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#41 0x0119df6a in ZEND_INCLUDE_OR_EVAL_SPEC_CV_HANDLER
(execute_data=0xbf829ad4)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:20117
#42 0x0115c795 in execute (op_array=0xa618b40) at
/root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#43 0x0115cdae in zend_do_fcall_common_helper_SPEC
(execute_data=0xbf82a104)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:234
#44 0x0115d888 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0xbf82a104)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:322
#45 0x0115c795 in execute (op_array=0xa61ad54) at
/root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#46 0x0115cdae in zend_do_fcall_common_helper_SPEC
(execute_data=0xbf82a574)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:234
#47 0x0115d888 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0xbf82a574)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:322
#48 0x0115c795 in execute (op_array=0xa446d64) at
/root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#49 0x0115cdae in zend_do_fcall_common_helper_SPEC
(execute_data=0xbf82a854)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:234
#50 0x0115d888 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0xbf82a854)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:322
#51 0x0115c795 in execute (op_array=0xa446180) at
/root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#52 0x0115cdae in zend_do_fcall_common_helper_SPEC
(execute_data=0xbf82ad34)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:234
#53 0x0115d888 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0xbf82ad34)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:322
#54 0x0115c795 in execute (op_array=0xa438670) at
/root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#55 0x0115cdae in zend_do_fcall_common_helper_SPEC
(execute_data=0xbf82b0d4)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:234
#56 0x0115d888 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0xbf82b0d4)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:322
#57 0x0115c795 in execute (op_array=0xa430580) at
/root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#58 0x0115cdae in zend_do_fcall_common_helper_SPEC
(execute_data=0xbf82b544)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:234
#59 0x0115d888 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0xbf82b544)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:322
#60 0x0115c795 in execute (op_array=0xa43887c) at
/root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#61 0x0115cdae in zend_do_fcall_common_helper_SPEC
(execute_data=0xbf82b8e4)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:234
#62 0x0115d888 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0xbf82b8e4)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:322
#63 0x0115c795 in execute (op_array=0xa430580) at
/root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#64 0x0115cdae in zend_do_fcall_common_helper_SPEC
(execute_data=0xbf82bb74)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:234
#65 0x0115d888 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0xbf82bb74)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:322
---Type <return> to continue, or q <return> to quit---
#66 0x0115c795 in execute (op_array=0xa43fb28) at
/root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#67 0x0115cdae in zend_do_fcall_common_helper_SPEC
(execute_data=0xbf82bf14)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:234
#68 0x0115d888 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0xbf82bf14)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:322
#69 0x0115c795 in execute (op_array=0xa430580) at
/root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#70 0x0115cdae in zend_do_fcall_common_helper_SPEC
(execute_data=0xbf82cb94)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:234
#71 0x0115d888 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0xbf82cb94)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:322
#72 0x0115c795 in execute (op_array=0x9f388e0) at
/root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#73 0x0115cdae in zend_do_fcall_common_helper_SPEC
(execute_data=0xbf82cf74)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:234
#74 0x0115d888 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0xbf82cf74)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:322
#75 0x0115c795 in execute (op_array=0x9f27344) at
/root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#76 0x0115cdae in zend_do_fcall_common_helper_SPEC
(execute_data=0xbf82d104)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:234
#77 0x0115d888 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0xbf82d104)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:322
#78 0x0115c795 in execute (op_array=0x9e0b748) at
/root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#79 0x0115cdae in zend_do_fcall_common_helper_SPEC
(execute_data=0xbf82d324)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:234
#80 0x0115d888 in ZEND_DO_FCALL_BY_NAME_SPEC_HANDLER
(execute_data=0xbf82d324)
at /root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:322
#81 0x0115c795 in execute (op_array=0x9c5989c) at
/root/Desktop/php-5.2.9/Zend/zend_vm_execute.h:92
#82 0x011375d7 in zend_execute_scripts (type=8, retval=0x0,
file_count=3)
at /root/Desktop/php-5.2.9/Zend/zend.c:1134
#83 0x010e4bb6 in php_execute_script (primary_file=0xbf82f664)
at /root/Desktop/php-5.2.9/main/main.c:2023
#84 0x011b4619 in php_handler (r=0x9c90fe0)
at /root/Desktop/php-5.2.9/sapi/apache2handler/sapi_apache2.c:632
#85 0x08076b89 in ap_run_handler (r=0x9c90fe0) at config.c:157
#86 0x08079cf7 in ap_invoke_handler (r=0x9c90fe0) at config.c:372
#87 0x08090998 in ap_process_request (r=0x9c90fe0) at
http_request.c:282
#88 0x0808dbab in ap_process_http_connection (c=0x9c8ce20) at
http_core.c:190
#89 0x0807dbd9 in ap_run_process_connection (c=0x9c8ce20) at
connection.c:43
#90 0x080a4035 in child_main (child_num_arg=<value optimized out>) at
prefork.c:650
#91 0x080a4263 in make_child (s=0x9ab1ce0, slot=0) at prefork.c:690
#92 0x080a503c in ap_mpm_run (_pconf=0x9aad0a8, plog=0x9aeb1a0,
s=0x9ab1ce0) at prefork.c:966
#93 0x08064695 in main (argc=162181280, argv=0x9c8ac40) at main.c:740
(gdb)
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=47724&edit=1
