apr-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "John L. Poole" <jlpool...@gmail.com>
Subject Re: testprocmutex hangs
Date Sun, 16 Jan 2011 15:30:25 GMT
My problem appears to be resolved, though I do not know why.

I ended up rebuilding apr and apr-utils using Gentoo's portage system, 
after that, my apache server no longer segment faulted.

Here's what was updated:
[I] dev-libs/apr
      Available versions:  (1) 1.3.9!t 1.4.2!t
         {doc older-kernels-compatibility +urandom}
      Installed versions:  1.4.2(1)!t(07:01:50 AM 01/16/2011)(urandom 
-doc -older-kernels-compatibility)
      Homepage:            http://apr.apache.org/
      Description:         Apache Portable Runtime Library

[I] dev-libs/apr-util
      Available versions:  (1) 1.3.9!t ~1.3.9-r1!t 1.3.10!t
         {berkdb doc freetds gdbm ldap mysql odbc postgres sqlite sqlite3}
      Installed versions:  1.3.10(1)!t(07:09:20 AM 01/16/2011)(berkdb 
gdbm ldap mysql postgres -doc -freetds -odbc -sqlite -sqlite3)
      Homepage:            http://apr.apache.org/
      Description:         Apache Portable Runtime Utility Library

What is new is that the apr-util was new.  The apr was simply a 
recompile.  I'll consider this matter closed and resolved, unless there 
is something more someone would like me to try in the test instances I 
created to further shed light on what was causing the problem.

On 1/15/2011 10:20 AM, John L. Poole wrote:
> Hi Sander,
>
> Dismayed, I needed to take a break from the fact that Apache on my ARM 
> (SheevaPlug) rapidly dies with a segmentation fault provided little 
> trail with which to debug.
>
> Background:
> Here are the bugs I filed in Gentoo which simply further document the 
> problem I experienced.
>
> https://bugs.gentoo.org/show_bug.cgi?id=347910
> www-servers/apache-2.2.16 builds then Segmentation faults at start up
> I'm the only commentator
>
> https://bugs.gentoo.org/show_bug.cgi?id=347908
> www-apache/libapreq2-2.12 fails to build: configure: error: Bad 
> apache2 binary (/usr/sbin/apache2)
> I'm basically the only commentator (fixed an ommission)
>
> I then posted to this mailing list on 12/13/2010.
>
> The last suggestion was Sander's, so here is what I did.  I'm not 
> quite sure how I should execute the "on top" part of your suggestion
>
> Current install.
>
> Apache:
> I downloaded  httpd-2.2.16.tar.bz2 and created a working directory at 
> /usr/local/src/httpd-2.2.16
> I created an output working area: /var/tmp/apache/httpd
>
> Within /usr/local/src/httpd-2.2.16  I did the following:
>
>     plug httpd-2.2.16 # CFLAGS="-DDEBUG -O0"; export CFLAGS
>     plug httpd-2.2.16 # ./configure --prefix=/var/tmp/apache/httpd 
> --enable-maintainer-mode
>     plug httpd-2.2.16 # make
>     plug httpd-2.2.16 # make install
>     plug httpd-2.2.16 # cd /var/tmp/apache/httpd/bin
>
>     plug httpd-2.2.16 # gdb httpd
>     GNU gdb (Gentoo 7.0.1 p1) 7.0.1
>     Copyright (C) 2009 Free Software Foundation, Inc.
>     License GPLv3+: GNU GPL version 3 or later 
> <http://gnu.org/licenses/gpl.html>
>     This is free software: you are free to change and redistribute it.
>     There is NO WARRANTY, to the extent permitted by law.  Type "show 
> copying"
>     and "show warranty" for details.
>     This GDB was configured as "armv5tel-softfloat-linux-gnueabi".
>     For bug reporting instructions, please see:
> <http://bugs.gentoo.org/>...
>     Reading symbols from /usr/local/src/httpd-2.2.16/httpd...(no 
> debugging symbols found)...done.
>     warning: not using untrusted file 
> "/usr/local/src/httpd-2.2.16/.gdbinit"
>     (gdb) run -X
>     Starting program: /usr/local/src/httpd-2.2.16/httpd -X
>     [Thread debugging using libthread_db enabled]
>
>     Program received signal SIGSEGV, Segmentation fault.
>     0x402600e4 in apr_palloc () from /usr/lib/libapr-1.so.0
>     (gdb)) bt
>     #0  0x402600e4 in apr_palloc () from /usr/lib/libapr-1.so.0
>     #1  0x4025a988 in apr_array_make () from /usr/lib/libapr-1.so.0
>     #2  0x400ddb54 in apr_hook_sort_register () from 
> /usr/lib/libaprutil-1.so.0
>     #3  0x00051f74 in ap_hook_create_connection ()
>     #4  0x0003f838 in register_hooks ()
>     #5  0x000485e4 in ap_register_hooks ()
>     #6  0x00048974 in ap_add_module ()
>     #7  0x00048d64 in ap_setup_prelinked_modules ()
>     #8  0x00028be0 in main ()
>     (gdb) quit
>     ...
>
>     plug httpd-2.2.16 # gdb httpd
>     GNU gdb (Gentoo 7.0.1 p1) 7.0.1
>     Copyright (C) 2009 Free Software Foundation, Inc.
>     License GPLv3+: GNU GPL version 3 or later 
> <http://gnu.org/licenses/gpl.html>
>     This is free software: you are free to change and redistribute it.
>     There is NO WARRANTY, to the extent permitted by law.  Type "show 
> copying"
>     and "show warranty" for details.
>     This GDB was configured as "armv5tel-softfloat-linux-gnueabi".
>     For bug reporting instructions, please see:
> <http://bugs.gentoo.org/>...
>     Reading symbols from /usr/local/src/httpd-2.2.16/httpd...(no 
> debugging symbols found)...done.
>     warning: not using untrusted file 
> "/usr/local/src/httpd-2.2.16/.gdbinit"
>     (gdb) run
>     Starting program: /usr/local/src/httpd-2.2.16/httpd
>     [Thread debugging using libthread_db enabled]
>
>     Program received signal SIGSEGV, Segmentation fault.
>     0x402600e4 in apr_palloc () from /usr/lib/libapr-1.so.0
>     (gdb) bt
>     #0  0x402600e4 in apr_palloc () from /usr/lib/libapr-1.so.0
>     #1  0x4025a988 in apr_array_make () from /usr/lib/libapr-1.so.0
>     #2  0x400ddb54 in apr_hook_sort_register () from 
> /usr/lib/libaprutil-1.so.0
>     #3  0x00051f74 in ap_hook_create_connection ()
>     #4  0x0003f838 in register_hooks ()
>     #5  0x000485e4 in ap_register_hooks ()
>     #6  0x00048974 in ap_add_module ()
>     #7  0x00048d64 in ap_setup_prelinked_modules ()
>     #8  0x00028be0 in main ()
>     (gdb)
>
> APR:
> I have apr-1.4.2  downloaded, but am not sure how to install it so 
> that my custom install of apache at /var/tmp/apache utilizes it.
>
> plug apr-1.4.2 #make clean
> plug apr-1.4.2 # ...
> plug apr-1.4.2 # echo $CFLAGS
> -DDEBUG -O0
> plug apr-1.4.2 # ./configure --enable-maintainer-mode
> plug apr-1.4.2 # make
>
> The output from ./configure, make,make install, and gdb are posted at:
>
> http://snipt.org/wknpm
>
> For convenience, here is the back trace:
>
> #0  0x402600e4 in apr_palloc () from /usr/lib/libapr-1.so.0
> #1  0x4025a988 in apr_array_make () from /usr/lib/libapr-1.so.0
> #2  0x400ddb54 in apr_hook_sort_register () from 
> /usr/lib/libaprutil-1.so.0
> #3  0x00051f74 in ap_hook_create_connection ()
> #4  0x0003f838 in register_hooks ()
> #5  0x000485e4 in ap_register_hooks ()
> #6  0x00048974 in ap_add_module ()
> #7  0x00048d64 in ap_setup_prelinked_modules ()
> #8  0x00028be0 in main ()
>
> Please let me know if there is any other compile or debug step I 
> should take to create something helpful to identify the problem.
>
> Thank you for you help,
>
> John
>
>
>
> On 12/22/2010 7:57 AM, Sander Temme wrote:
>> On Dec 22, 2010, at 6:20 AM, John L. Poole wrote:
>>
>>> Am I missing something, as the output above seems the same as when I did not
have debugging
>> How are you making Apache use your new library?  I suggest compiling your own Apache
on top of your own APR/APR-Util, and debugging against that.
>>
>> In the system build, something is clearly happening that horribly confuses the debugger.
>>
>> S.
>>
>
> -- 
>
> John Laurence Poole
> P.O. Box 6566
> Napa CA 94581-6566
> 707-812-1323 office
>

-- 

John Laurence Poole
P.O. Box 6566
Napa CA 94581-6566
707-812-1323 office


Mime
View raw message