Re: FreeBSD compile problem (was Getting ready for 3.2 beta 2)

[Nicolas Lehuen]

OK, so on a non-threaded Apache, we can suppose we will be using the
prefork MPM, so we don't need any code to support threading in
mod_python, then, right ?

In this case instead of testing for WITH_THREAD in mod_python.c :

#ifdef WITH_THREAD
maybe we could test for WITH_THREAD and APR_HAS_THREADS :

#if APR_HAS_THREADS && defined(WITH_THREAD)

Right ? This would remove all threading-related code from mod_python
when only prefork is available or when Python isn't compiled to support
threads (I which case I wonder how it works in a threaded Apache...).

I have given up using QEMU for now, minotaur is sufficient to make sure
mod_python builds on FreeBSD. Granted, it won't allow me to give any +1
since I cannot run the unit tests (or can I ?)...

Regards,
Nicolas
2005/9/11, Jim Gallacher <[EMAIL PROTECTED]>:
FYI, I found the following note in the INSTALL file in the apache source:   * If you are building on FreeBSD, be aware that threads will be disabled and the prefork MPM will be used by default, as threads do not work well with Apache on FreeBSD.  If
 you wish to try a threaded Apache on FreeBSD anyway, use "./configure --enable-threads".I'm also setting up FreeBSD under QEMU... so far so good, but installinganything using ports is really slow. QEMU's performance here is just
killing me. I guess I should have read the manual first and used thebinary packages for the software I wanted to install. :-(Regards,JimJim Gallacher wrote:> Nicolas Lehuen wrote:>
>> OK, I've checked in a version that compiles both on at least Win32 and>> FreeBSD. I'm just testing if APR_HAS_THREAD is defined and only>> include the apr_thread_mutex_lock and unlock calls if it is defined.
>>> Compiles a passes unit tests on Linux Debian sid with mpm-prefork.>>> Now, on minotaur, APR_HAS_THREAD is defined as 0. Does this mean that>> Apache is not configured for threading ? Can we assume that we are in
>> the prefork model if APR_HAS_THREAD==0, so that we can skip all the>> locking code ? Because that's what we do right now.>>> On Debian sid with apache2.0.54 mpm-prefork, APR_HAS_THREAD == 1.
>> Jim>>> Regards,>> Nicolas 2005/9/11, Nicolas Lehuen <[EMAIL PROTECTED]>> 
[EMAIL PROTECTED]>>: Yes, this new code is something I commited on the 29/12/2004 (I used>> the "blame" function of TortoiseSVN for that). It was a patch by
>> Graham to fix MODPYTHON-2>> . The problem is not in the patch, but rather in the fact that APR
>> seems configured without the thread support while Python is>> configured with thread support. mod_python.c assumes that is>> WITH_THREAD is defined, then the APR mutex functions are available,
>> which is wrong. Maybe we should test for APR_HAS_THREADS instead ?>> In that case, won't this cause any problems on threaded platforms ? I don't know if this is a problem specific to minotaur or to all
>> version of FreeBSD. I'm currently downloading the ISOs of FreeBSD>> and I'll try using QEMU to run a FreeBSD setup on my computer, but>> that will be long and troublesome. If someone has more clue on this
>> issue, feel free to tell us :). Regards,>> Nicolas 2005/9/10, Jim Gallacher <[EMAIL PROTECTED]
>> [EMAIL PROTECTED]>>:>  I'm stubling around in the dark here, but maybe this will create a spark
>  of an idea. I took a diff of mod_python.c from 3.1.4 and 3.2.1b and>>>  isolated the lines which correspond to the compilation error.>>  Compiler messages
>>>  ->>  mod_python.c:34: error: syntax error before '*' token>>>  mod_python.c:34: warning: type defaults to `int' in declaration of>>>  `interpreters_lock'
>>>  mod_python.c:34: warning: data definition has no type or storage class>>>  mod_python.c: In function `get_interpreter':>>>  mod_python.c:131: warning: implicit declaration of function
>>>  `apr_thread_mutex_lock'>>>  mod_python.c:161: warning: implicit declaration of function>>>  `apr_thread_mutex_unlock'>>>  mod_python.c: In function `python_init':
>>>  mod_python.c:517: warning: implicit declaration of function>>>  `apr_thread_mutex_create'>>>  mod_python.c:517: error: `APR_THREAD_MUTEX_UNNESTED' undeclared (first>>>  use in this function)
>  Diff output>>>  --->>>  I've only copied the diff chunks which correspond to the complier errors>>
>>>  mentioned above.>>  --- mod_python-3.1.4/src/mod_python.c   Sat Jan 29 13:25:28 2005>>>  +++ mod_python-3.2.1b/src/mod_python.c  Tue Sep  6 17:11:03 2005>>>  @@ -31,6 +31,8 @@
>>>* (In a Python dictionary) */>>>   static PyObject * interpreters = NULL;>>  +static apr_thread_mutex_t* interpreters_lock = 0;>>>  +>>>   apr_pool_t *child_init_pool = NULL;
>>  ... snip ...>>  @@ -124,11 +128,15 @@>>>   name = MAIN_INTERPRETER;>>   #ifdef WITH_THREAD>>>  +apr_thread_mutex_lock(interpreters_lock);
>>>   PyEval_Acqu

Re: FreeBSD compile problem (was Getting ready for 3.2 beta 2)

[Jim Gallacher]

Nicolas Lehuen wrote:
OK, so on a non-threaded Apache, we can suppose we will be using the 
prefork MPM, so we don't need any code to support threading in 
mod_python, then, right ?


Makes sense to me.


In this case instead of testing for WITH_THREAD in mod_python.c :

#ifdef WITH_THREAD

maybe we could test for WITH_THREAD and APR_HAS_THREADS :

#if APR_HAS_THREADS && defined(WITH_THREAD)

Right ? This would remove all threading-related code from mod_python 
when only prefork is available or when Python isn't compiled to support 
threads (I which case I wonder how it works in a threaded Apache...).


Seems reasonable. It compiles and passes the unit tests on debian.

I have given up using QEMU for now, minotaur is sufficient to make sure 
mod_python builds on FreeBSD. Granted, it won't allow me to give any +1 
since I cannot run the unit tests (or can I ?)...


I got FreeBSD running under QEMU, and the results are the same as on 
minotaur. With the "#if APR_HAS_THREADS && defined(WITH_THREAD)" code 
change, mod_python compiles but the final link step generates a warning 
on both minotaur and qemu:


/usr/local/share/apache2/build/libtool --silent --mode=link cc -o 
mod_python.la  -rpath /usr/local/libexec/apache2 -module -avoid-version 
   hlistobject.lo hlist.lo filterobject.lo connobject.lo 
serverobject.lo util.lo tableobject.lo requestobject.lo _apachemodule.lo 
mod_python.lo -Wl,--export-dynamic -pthread -lm 
/usr/local/lib/python2.4/config/libpython2.4.a -lutil -lm


*** Warning: Linking the shared library mod_python.la against the
*** static library /usr/local/lib/python2.4/config/libpython2.4.a is not 
portable!


Likewise, the unit tests on both QEMU and minotaur fail.

On minotaur:
Syntax error on line 44 of 
/home/jgallacher/tmp/mod_python/test/conf/test.conf:
Cannot load /home/jgallacher/tmp/mod_python/src/mod_python.so into 
server: /home/jgallacher/tmp/mod_python/src/mod_python.so: Undefined 
symbol "btowc"


On qemu:
Syntax error on line 44 of /usr/home/jim/tmp/mod_python/test/conf/test.conf:
Cannot load /usr/home/jim/tmp/mod_python/src/mod_python.so into server: 
/usr/home/jim/tmp/mod_python/src/mod_python.so: Undefined symbol 
"pthread_attr_init"


It is quite possible I don't have things configured correctly on the 
QEMU version and hence the different undefined symbol but it doesn't 
really matter since it fails either way. I don't have time to 
investigate further right now. I'll revisit this tonight.


Regards,
Jim


Regards,
Nicolas
#if APR_HAS_THREADS && defined(WITH_THREAD)
2005/9/11, Jim Gallacher <[EMAIL PROTECTED] 
>:


FYI, I found the following note in the INSTALL file in the apache
source:

   * If you are building on FreeBSD, be aware that threads will
 be disabled and the prefork MPM will be used by default,
 as threads do not work well with Apache on FreeBSD.  If
 you wish to try a threaded Apache on FreeBSD anyway, use
 "./configure --enable-threads".

I'm also setting up FreeBSD under QEMU... so far so good, but installing
anything using ports is really slow. QEMU's performance here is just
killing me. I guess I should have read the manual first and used the
binary packages for the software I wanted to install. :-(

Regards,
Jim

Jim Gallacher wrote:
 > Nicolas Lehuen wrote:
 >
 >> OK, I've checked in a version that compiles both on at least
Win32 and
 >> FreeBSD. I'm just testing if APR_HAS_THREAD is defined and only
 >> include the apr_thread_mutex_lock and unlock calls if it is
defined.
 >
 >
 > Compiles a passes unit tests on Linux Debian sid with mpm-prefork.
 >
 >> Now, on minotaur, APR_HAS_THREAD is defined as 0. Does this mean
that
 >> Apache is not configured for threading ? Can we assume that we
are in
 >> the prefork model if APR_HAS_THREAD==0, so that we can skip all the
 >> locking code ? Because that's what we do right now.
 >
 >
 > On Debian sid with apache2.0.54 mpm-prefork, APR_HAS_THREAD == 1.
 >
 > Jim
 >
 >> Regards,
 >> Nicolas
 >>
 >> 2005/9/11, Nicolas Lehuen <[EMAIL PROTECTED]

 >> mailto:[EMAIL PROTECTED]>>>:
 >>
 >> Yes, this new code is something I commited on the 29/12/2004
(I used
 >> the "blame" function of TortoiseSVN for that). It was a
patch by
 >> Graham to fix MODPYTHON-2
 >> .
 >>
 >> The problem is not in the patch, but rather in the fact that
APR
 >> seems configured without the thread support while Python is
 >> configured with thread support. mod_python.c assumes that is
 >> WITH_THREAD is defined, then the APR mutex functions are
available,
 >> which is wrong. Maybe we should test for APR_HAS_THREADS
instead ?
 >> In that case, won't thi

Re: FreeBSD compile problem (was Getting ready for 3.2 beta 2)

[Gregory (Grisha) Trubetskoy]

On Mon, 12 Sep 2005, Jim Gallacher wrote:


*** Warning: Linking the shared library mod_python.la against the
*** static library /usr/local/lib/python2.4/config/libpython2.4.a is not 
portable!


I think this was always there and its pretty harmless.


On qemu:
Syntax error on line 44 of /usr/home/jim/tmp/mod_python/test/conf/test.conf:
Cannot load /usr/home/jim/tmp/mod_python/src/mod_python.so into server: 
/usr/home/jim/tmp/mod_python/src/mod_python.so: Undefined symbol 
"pthread_attr_init"



This is because FreeBSD's libc comes in two versions - threaded and 
non-threaded. If Python is linked against the threaded ones and Apache 
against the non-thrreaded, then you get this problem. There is a simple 
fix for this - you just cause Apache to start with threaded libs, but I 
can't find any references to it right now and have to run off to a 
meeting.


Grisha





It is quite possible I don't have things configured correctly on the QEMU 
version and hence the different undefined symbol but it doesn't really matter 
since it fails either way. I don't have time to investigate further right 
now. I'll revisit this tonight.


Regards,
Jim


Regards,
Nicolas
#if APR_HAS_THREADS && defined(WITH_THREAD)
2005/9/11, Jim Gallacher <[EMAIL PROTECTED] 
>:


FYI, I found the following note in the INSTALL file in the apache
source:

   * If you are building on FreeBSD, be aware that threads will
 be disabled and the prefork MPM will be used by default,
 as threads do not work well with Apache on FreeBSD.  If
 you wish to try a threaded Apache on FreeBSD anyway, use
 "./configure --enable-threads".

I'm also setting up FreeBSD under QEMU... so far so good, but 
installing

anything using ports is really slow. QEMU's performance here is just
killing me. I guess I should have read the manual first and used the
binary packages for the software I wanted to install. :-(

Regards,
Jim

Jim Gallacher wrote:
 > Nicolas Lehuen wrote:
 >
 >> OK, I've checked in a version that compiles both on at least
Win32 and
 >> FreeBSD. I'm just testing if APR_HAS_THREAD is defined and only
 >> include the apr_thread_mutex_lock and unlock calls if it is
defined.
 >
 >
 > Compiles a passes unit tests on Linux Debian sid with mpm-prefork.
 >
 >> Now, on minotaur, APR_HAS_THREAD is defined as 0. Does this mean
that
 >> Apache is not configured for threading ? Can we assume that we
are in
 >> the prefork model if APR_HAS_THREAD==0, so that we can skip all 
the

 >> locking code ? Because that's what we do right now.
 >
 >
 > On Debian sid with apache2.0.54 mpm-prefork, APR_HAS_THREAD == 1.
 >
 > Jim
 >
 >> Regards,
 >> Nicolas
 >>
 >> 2005/9/11, Nicolas Lehuen <[EMAIL PROTECTED]

 >> mailto:[EMAIL PROTECTED]>>>:
 >>
 >> Yes, this new code is something I commited on the 29/12/2004
(I used
 >> the "blame" function of TortoiseSVN for that). It was a
patch by
 >> Graham to fix MODPYTHON-2
 >> .
 >>
 >> The problem is not in the patch, but rather in the fact that
APR
 >> seems configured without the thread support while Python is
 >> configured with thread support. mod_python.c assumes that is
 >> WITH_THREAD is defined, then the APR mutex functions are
available,
 >> which is wrong. Maybe we should test for APR_HAS_THREADS
instead ?
 >> In that case, won't this cause any problems on threaded
platforms ?
 >>
 >> I don't know if this is a problem specific to minotaur or to
all
 >> version of FreeBSD. I'm currently downloading the ISOs of
FreeBSD
 >> and I'll try using QEMU to run a FreeBSD setup on my
computer, but
 >> that will be long and troublesome. If someone has more clue
on this
 >> issue, feel free to tell us :).
 >>
 >> Regards,
 >> Nicolas
 >>
 >> 2005/9/10, Jim Gallacher <[EMAIL PROTECTED]

 >> >>:

 >>
 >>>  I'm stubling around in the dark here, but maybe this will create 
a

 >>
 >> spark
 >>
 >>>  of an idea. I took a diff of mod_python.c from 3.1.4 and
3.2.1b and
 >>>  isolated the lines which correspond to the compilation error.
 >>>
 >>>  Compiler messages
 >>>  -
 >>>
 >>>  mod_python.c:34: error: syntax error before '*' token
 >>>  mod_python.c:34: warning: type defaults to `int' in declaration 
of

 >>>  `interpreters_lock'
 >>>  mod_python.c:34: warning: data definition has no type or
storage class
 >>>  mod_python.c: In function `get_interpreter':
 >>>  mod_py

Re: FreeBSD compile problem (was Getting ready for 3.2 beta 2)

[Nicolas Lehuen]

2005/9/12, Gregory (Grisha) Trubetskoy <[EMAIL PROTECTED]>:
On Mon, 12 Sep 2005, Jim Gallacher wrote:> *** Warning: Linking the shared library mod_python.la against the> *** static library /usr/local/lib/python2.4/config/libpython2.4.a is not> portable!
I think this was always there and its pretty harmless.> On qemu:> Syntax error on line 44 of /usr/home/jim/tmp/mod_python/test/conf/test.conf:> Cannot load /usr/home/jim/tmp/mod_python/src/mod_python.so into server:
> /usr/home/jim/tmp/mod_python/src/mod_python.so: Undefined symbol> "pthread_attr_init"This is because FreeBSD's libc comes in two versions - threaded andnon-threaded. If Python is linked against the threaded ones and Apache
against the non-thrreaded, then you get this problem. There is a simplefix for this - you just cause Apache to start with threaded libs, but Ican't find any references to it right now and have to run off to a
meeting.Grisha
Maybe we could make sure that ALL threading code is removed when either
Python or Apache is not threaded ? I.e. perform a code review to make
sure that the "#if APR_HAS_THREADS && defined(WITH_THREAD)" trick is performed everywhere some threading code is written.

Regards,
Nicolas

Re: mod_python 3.2.1b available for testing

[Joe Orton]

On Wed, Sep 07, 2005 at 11:00:07PM -0400, Gregory (Grisha) Trubetskoy wrote:
> Anybody got FreeBSD? I'm getting this. This is an old and possibly 
> misconfigured system, so the problem could be on my end.
> 
> FreeBSD 4.9
> apache 2.0.53 (from ports)
> python 2.3.3
...
> -I/home/grisha/src/tmp/mod_python-3.2.1b/src/include 
> -I/usr/local/include/apache2 -I/usr/local/include/python2.3  -c -o 
> mod_python.lo mod_python.c && touch mod_python.slo
> mod_python.c:34: syntax error before `*'
> mod_python.c:34: warning: data definition has no type or storage class
> mod_python.c: In function `python_cleanup':
> mod_python.c:238: warning: passing arg 1 of `free' discards qualifiers from 
> pointer target type
> mod_python.c: In function `python_init':
> mod_python.c:517: `APR_THREAD_MUTEX_UNNESTED' undeclared (first use in this 

On older releases of FreeBSD, APR is not build with threads support, 
which is probably the failure here.

To work around this in mod_python you can use:

#if APR_HAS_THREADS

...

#endif

around all code dependant on APR threads support.

Regards,

joe

Re: FreeBSD compile problem (was Getting ready for 3.2 beta 2)

[Gregory (Grisha) Trubetskoy]

OK, found it. This should work on FreeBSD where Python is threaded and 
Apache is not.


[snip]

 And, if you built apache without thread support, you may need to add the
 following lines to $PREFIX/sbin/envvars:

 LD_PRELOAD=/usr/lib/libc_r.so
 export LD_PRELOAD

[snip]


On Mon, 12 Sep 2005, Gregory (Grisha) Trubetskoy wrote:



On Mon, 12 Sep 2005, Jim Gallacher wrote:


*** Warning: Linking the shared library mod_python.la against the
*** static library /usr/local/lib/python2.4/config/libpython2.4.a is not 
portable!


I think this was always there and its pretty harmless.


On qemu:
Syntax error on line 44 of 
/usr/home/jim/tmp/mod_python/test/conf/test.conf:
Cannot load /usr/home/jim/tmp/mod_python/src/mod_python.so into server: 
/usr/home/jim/tmp/mod_python/src/mod_python.so: Undefined symbol 
"pthread_attr_init"



This is because FreeBSD's libc comes in two versions - threaded and 
non-threaded. If Python is linked against the threaded ones and Apache 
against the non-thrreaded, then you get this problem. There is a simple fix 
for this - you just cause Apache to start with threaded libs, but I can't 
find any references to it right now and have to run off to a meeting.


Grisha





It is quite possible I don't have things configured correctly on the QEMU 
version and hence the different undefined symbol but it doesn't really 
matter since it fails either way. I don't have time to investigate further 
right now. I'll revisit this tonight.


Regards,
Jim


Regards,
Nicolas
#if APR_HAS_THREADS && defined(WITH_THREAD)
2005/9/11, Jim Gallacher <[EMAIL PROTECTED] 
>:


FYI, I found the following note in the INSTALL file in the apache
source:

   * If you are building on FreeBSD, be aware that threads will
 be disabled and the prefork MPM will be used by default,
 as threads do not work well with Apache on FreeBSD.  If
 you wish to try a threaded Apache on FreeBSD anyway, use
 "./configure --enable-threads".

I'm also setting up FreeBSD under QEMU... so far so good, but 
installing

anything using ports is really slow. QEMU's performance here is just
killing me. I guess I should have read the manual first and used the
binary packages for the software I wanted to install. :-(

Regards,
Jim

Jim Gallacher wrote:
 > Nicolas Lehuen wrote:
 >
 >> OK, I've checked in a version that compiles both on at least
Win32 and
 >> FreeBSD. I'm just testing if APR_HAS_THREAD is defined and only
 >> include the apr_thread_mutex_lock and unlock calls if it is
defined.
 >
 >
 > Compiles a passes unit tests on Linux Debian sid with 
mpm-prefork.

 >
 >> Now, on minotaur, APR_HAS_THREAD is defined as 0. Does this mean
that
 >> Apache is not configured for threading ? Can we assume that we
are in
 >> the prefork model if APR_HAS_THREAD==0, so that we can skip all 
the

 >> locking code ? Because that's what we do right now.
 >
 >
 > On Debian sid with apache2.0.54 mpm-prefork, APR_HAS_THREAD == 1.
 >
 > Jim
 >
 >> Regards,
 >> Nicolas
 >>
 >> 2005/9/11, Nicolas Lehuen <[EMAIL PROTECTED]

 >> mailto:[EMAIL PROTECTED]>>>:
 >>
 >> Yes, this new code is something I commited on the 29/12/2004
(I used
 >> the "blame" function of TortoiseSVN for that). It was a
patch by
 >> Graham to fix MODPYTHON-2
 >> .
 >>
 >> The problem is not in the patch, but rather in the fact that
APR
 >> seems configured without the thread support while Python is
 >> configured with thread support. mod_python.c assumes that is
 >> WITH_THREAD is defined, then the APR mutex functions are
available,
 >> which is wrong. Maybe we should test for APR_HAS_THREADS
instead ?
 >> In that case, won't this cause any problems on threaded
platforms ?
 >>
 >> I don't know if this is a problem specific to minotaur or to
all
 >> version of FreeBSD. I'm currently downloading the ISOs of
FreeBSD
 >> and I'll try using QEMU to run a FreeBSD setup on my
computer, but
 >> that will be long and troublesome. If someone has more clue
on this
 >> issue, feel free to tell us :).
 >>
 >> Regards,
 >> Nicolas
 >>
 >> 2005/9/10, Jim Gallacher <[EMAIL PROTECTED]

 >> >>:

 >>
 >>>  I'm stubling around in the dark here, but maybe this will 
create a

 >>
 >> spark
 >>
 >>>  of an idea. I took a diff of mod_python.c from 3.1.4 and
3.2.1b and
 >>>  isolated the lines which correspond to the compilation error.
 >>>
 >>>  Compiler messages
 >>>  -
   

Re: FreeBSD compile problem (was Getting ready for 3.2 beta 2)

[Gregory (Grisha) Trubetskoy]

Just wanted to add to this message that if Jim's version runs and tests 
with the trick below (envvars is executed prior to apache start, but I 
don't think the tests use it, so you'll probably just have to set this var 
in the shell in which the tests are run), then this would be a solution 
for all FreeBSD issues and we could roll a beta 3 which will have a great 
change of being publicly released.


Grisha

On Mon, 12 Sep 2005, Gregory (Grisha) Trubetskoy wrote:



OK, found it. This should work on FreeBSD where Python is threaded and Apache 
is not.


[snip]

And, if you built apache without thread support, you may need to add the
following lines to $PREFIX/sbin/envvars:

LD_PRELOAD=/usr/lib/libc_r.so
export LD_PRELOAD

[snip]


On Mon, 12 Sep 2005, Gregory (Grisha) Trubetskoy wrote:



On Mon, 12 Sep 2005, Jim Gallacher wrote:


*** Warning: Linking the shared library mod_python.la against the
*** static library /usr/local/lib/python2.4/config/libpython2.4.a is not 
portable!


I think this was always there and its pretty harmless.


On qemu:
Syntax error on line 44 of 
/usr/home/jim/tmp/mod_python/test/conf/test.conf:
Cannot load /usr/home/jim/tmp/mod_python/src/mod_python.so into server: 
/usr/home/jim/tmp/mod_python/src/mod_python.so: Undefined symbol 
"pthread_attr_init"



This is because FreeBSD's libc comes in two versions - threaded and 
non-threaded. If Python is linked against the threaded ones and Apache 
against the non-thrreaded, then you get this problem. There is a simple 
fix for this - you just cause Apache to start with threaded libs, but I 
can't find any references to it right now and have to run off to a 
meeting.


Grisha





It is quite possible I don't have things configured correctly on the 
QEMU version and hence the different undefined symbol but it doesn't 
really matter since it fails either way. I don't have time to 
investigate further right now. I'll revisit this tonight.


Regards,
Jim


Regards,
Nicolas
#if APR_HAS_THREADS && defined(WITH_THREAD)
2005/9/11, Jim Gallacher <[EMAIL PROTECTED] 
>:


FYI, I found the following note in the INSTALL file in the apache
source:

   * If you are building on FreeBSD, be aware that threads will
 be disabled and the prefork MPM will be used by default,
 as threads do not work well with Apache on FreeBSD.  If
 you wish to try a threaded Apache on FreeBSD anyway, use
 "./configure --enable-threads".

I'm also setting up FreeBSD under QEMU... so far so good, but 
installing
anything using ports is really slow. QEMU's performance here is 
just
killing me. I guess I should have read the manual first and used 
the

binary packages for the software I wanted to install. :-(

Regards,
Jim

Jim Gallacher wrote:
 > Nicolas Lehuen wrote:
 >
 >> OK, I've checked in a version that compiles both on at least
Win32 and
 >> FreeBSD. I'm just testing if APR_HAS_THREAD is defined and 
only

 >> include the apr_thread_mutex_lock and unlock calls if it is
defined.
 >
 >
 > Compiles a passes unit tests on Linux Debian sid with 
mpm-prefork.

 >
 >> Now, on minotaur, APR_HAS_THREAD is defined as 0. Does this 
mean

that
 >> Apache is not configured for threading ? Can we assume that we
are in
 >> the prefork model if APR_HAS_THREAD==0, so that we can skip 
all the

 >> locking code ? Because that's what we do right now.
 >
 >
 > On Debian sid with apache2.0.54 mpm-prefork, APR_HAS_THREAD == 
1.

 >
 > Jim
 >
 >> Regards,
 >> Nicolas
 >>
 >> 2005/9/11, Nicolas Lehuen <[EMAIL PROTECTED]

 >> mailto:[EMAIL PROTECTED]>>>:
 >>
 >> Yes, this new code is something I commited on the 
29/12/2004

(I used
 >> the "blame" function of TortoiseSVN for that). It was a
patch by
 >> Graham to fix MODPYTHON-2
 >> .
 >>
 >> The problem is not in the patch, but rather in the fact 
that

APR
 >> seems configured without the thread support while Python 
is
 >> configured with thread support. mod_python.c assumes that 
is

 >> WITH_THREAD is defined, then the APR mutex functions are
available,
 >> which is wrong. Maybe we should test for APR_HAS_THREADS
instead ?
 >> In that case, won't this cause any problems on threaded
platforms ?
 >>
 >> I don't know if this is a problem specific to minotaur or 
to

all
 >> version of FreeBSD. I'm currently downloading the ISOs of
FreeBSD
 >> and I'll try using QEMU to run a FreeBSD setup on my
computer, but
 >> that will be long and troublesome. If someone has more 
clue

on this
 >> issue, feel free to tell us :).
 >>
 >> Regards,
 >> Nicolas
 >>
 >>

Re: FreeBSD compile problem (was Getting ready for 3.2 beta 2)

[Nicolas Lehuen]

I've checked in a changeset wherein I define
MOD_PYTHON_WITH_THREAD_SUPPORT and use it everywhere WITH_THREAD was
previously used. This should do the trick ! Now if someone (like Jim)
can give us his +1, that would be great.

Regards,
Nicolas2005/9/12, Gregory (Grisha) Trubetskoy <[EMAIL PROTECTED]>:
Just wanted to add to this message that if Jim's version runs and testswith the trick below (envvars is executed prior to apache start, but Idon't think the tests use it, so you'll probably just have to set this var
in the shell in which the tests are run), then this would be a solutionfor all FreeBSD issues and we could roll a beta 3 which will have a greatchange of being publicly released.GrishaOn Mon, 12 Sep 2005, Gregory (Grisha) Trubetskoy wrote:
>> OK, found it. This should work on FreeBSD where Python is threaded and Apache> is not.>> [snip]>> And, if you built apache without thread support, you may need to add the
> following lines to $PREFIX/sbin/envvars:>> LD_PRELOAD=/usr/lib/libc_r.so> export LD_PRELOAD>> [snip]>>> On Mon, 12 Sep 2005, Gregory (Grisha) Trubetskoy wrote:
> On Mon, 12 Sep 2005, Jim Gallacher wrote:> *** Warning: Linking the shared library mod_python.la against the>>> *** static library /usr/local/lib/python2.4/config/libpython2.4.a is not
>>> portable! I think this was always there and its pretty harmless.> On qemu:>>> Syntax error on line 44 of>>> /usr/home/jim/tmp/mod_python/test/conf/test.conf:
>>> Cannot load /usr/home/jim/tmp/mod_python/src/mod_python.so into server:>>> /usr/home/jim/tmp/mod_python/src/mod_python.so: Undefined symbol>>> "pthread_attr_init">>
 This is because FreeBSD's libc comes in two versions - threaded and>> non-threaded. If Python is linked against the threaded ones and Apache>> against the non-thrreaded, then you get this problem. There is a simple
>> fix for this - you just cause Apache to start with threaded libs, but I>> can't find any references to it right now and have to run off to a>> meeting. Grisha>>
>> It is quite possible I don't have things configured correctly on the>>> QEMU version and hence the different undefined symbol but it doesn't>>> really matter since it fails either way. I don't have time to
>>> investigate further right now. I'll revisit this tonight.>> Regards,>>> Jim>>> Regards, Nicolas #if APR_HAS_THREADS && defined(WITH_THREAD)
 2005/9/11, Jim Gallacher <[EMAIL PROTECTED] [EMAIL PROTECTED]>>:
 FYI, I found the following note in the INSTALL file in the apache source:* If you are building on FreeBSD, be aware that threads will
  be
disabled and the prefork MPM will be used by default,  as
threads do not work well with Apache on FreeBSD.  If  you
wish to try a threaded Apache on FreeBSD anyway, use  "./configure --enable-threads". I'm also setting up FreeBSD under QEMU... so far so good, but
 installing anything using ports is really slow. QEMU's performance here is just killing me. I guess I should have read the manual first and used
 the binary packages for the software I wanted to install. :-( Regards, Jim Jim Gallacher wrote:
  > Nicolas Lehuen wrote:  >  >> OK, I've checked in a version that compiles both on at least Win32 and  >> FreeBSD. I'm just testing if APR_HAS_THREAD is defined and
 only  >> include the apr_thread_mutex_lock and unlock calls if it is defined.  >  >  > Compiles a passes unit tests on Linux Debian sid with
 mpm-prefork.  >  >> Now, on minotaur, APR_HAS_THREAD is defined as 0. Does this mean that  >> Apache is not configured for threading ? Can we assume that we
 are in  >> the prefork model if APR_HAS_THREAD==0, so that we can skip all the  >> locking code ? Because that's what we do right now.
  >  >  > On Debian sid with apache2.0.54 mpm-prefork, APR_HAS_THREAD == 1.  >  > Jim
  >  >> Regards,  >> Nicolas  >>  >> 2005/9/11, Nicolas Lehuen <
[EMAIL PROTECTED] [EMAIL PROTECTED]>  >> 
[EMAIL PROTECTED] [EMAIL PROTECTED]>>>:  >>  >>
Yes, this new code is something I commited on the 29/12/2004 (I used  >>
the "blame" function of TortoiseSVN for that). It was a patch by  >> Graham to fix MODPYTHON-2  >> <
http://issues.apache.org/jira/browse/MODPYTHON-2>.  >>  >>
The problem is not in the patch, but rather in the fact that APR  >>
seems configured without the thread support while Python is  >>
configured with thread support. mod_python.c assumes that is  >>
WITH_THREAD is defined, then the A

Re: FreeBSD compile problem (was Getting ready for 3.2 beta 2)

[Gregory (Grisha) Trubetskoy]

Shouldn't that be PYTHON_WITH_THREAD rather than MOD_PYTHON_WITH_THREAD?

Grisha

On Mon, 12 Sep 2005, Nicolas Lehuen wrote:


I've checked in a changeset wherein I define MOD_PYTHON_WITH_THREAD_SUPPORT
and use it everywhere WITH_THREAD was previously used. This should do the
trick ! Now if someone (like Jim) can give us his +1, that would be great.

Regards,
Nicolas

2005/9/12, Gregory (Grisha) Trubetskoy <[EMAIL PROTECTED]>:



Just wanted to add to this message that if Jim's version runs and tests
with the trick below (envvars is executed prior to apache start, but I
don't think the tests use it, so you'll probably just have to set this var
in the shell in which the tests are run), then this would be a solution
for all FreeBSD issues and we could roll a beta 3 which will have a great
change of being publicly released.

Grisha

On Mon, 12 Sep 2005, Gregory (Grisha) Trubetskoy wrote:



OK, found it. This should work on FreeBSD where Python is threaded and

Apache

is not.

[snip]

And, if you built apache without thread support, you may need to add the
following lines to $PREFIX/sbin/envvars:

LD_PRELOAD=/usr/lib/libc_r.so
export LD_PRELOAD

[snip]


On Mon, 12 Sep 2005, Gregory (Grisha) Trubetskoy wrote:



On Mon, 12 Sep 2005, Jim Gallacher wrote:


*** Warning: Linking the shared library mod_python.la against the
*** static library /usr/local/lib/python2.4/config/libpython2.4.a is

not

portable!


I think this was always there and its pretty harmless.


On qemu:
Syntax error on line 44 of
/usr/home/jim/tmp/mod_python/test/conf/test.conf:
Cannot load /usr/home/jim/tmp/mod_python/src/mod_python.so into

server:

/usr/home/jim/tmp/mod_python/src/mod_python.so: Undefined symbol
"pthread_attr_init"



This is because FreeBSD's libc comes in two versions - threaded and
non-threaded. If Python is linked against the threaded ones and Apache
against the non-thrreaded, then you get this problem. There is a simple
fix for this - you just cause Apache to start with threaded libs, but I
can't find any references to it right now and have to run off to a
meeting.

Grisha





It is quite possible I don't have things configured correctly on the
QEMU version and hence the different undefined symbol but it doesn't
really matter since it fails either way. I don't have time to
investigate further right now. I'll revisit this tonight.

Regards,
Jim


Regards,
Nicolas
#if APR_HAS_THREADS && defined(WITH_THREAD)
2005/9/11, Jim Gallacher <[EMAIL PROTECTED]
>:

FYI, I found the following note in the INSTALL file in the apache
source:

* If you are building on FreeBSD, be aware that threads will
be disabled and the prefork MPM will be used by default,
as threads do not work well with Apache on FreeBSD. If
you wish to try a threaded Apache on FreeBSD anyway, use
"./configure --enable-threads".

I'm also setting up FreeBSD under QEMU... so far so good, but
installing
anything using ports is really slow. QEMU's performance here is
just
killing me. I guess I should have read the manual first and used
the
binary packages for the software I wanted to install. :-(

Regards,
Jim

Jim Gallacher wrote:

Nicolas Lehuen wrote:


OK, I've checked in a version that compiles both on at least

Win32 and

FreeBSD. I'm just testing if APR_HAS_THREAD is defined and

only

include the apr_thread_mutex_lock and unlock calls if it is

defined.



Compiles a passes unit tests on Linux Debian sid with

mpm-prefork.



Now, on minotaur, APR_HAS_THREAD is defined as 0. Does this

mean
that

Apache is not configured for threading ? Can we assume that we

are in

the prefork model if APR_HAS_THREAD==0, so that we can skip

all the

locking code ? Because that's what we do right now.



On Debian sid with apache2.0.54 mpm-prefork, APR_HAS_THREAD ==

1.


Jim


Regards,
Nicolas

2005/9/11, Nicolas Lehuen <[EMAIL PROTECTED]




>>:


Yes, this new code is something I commited on the

29/12/2004
(I used

the "blame" function of TortoiseSVN for that). It was a

patch by

Graham to fix MODPYTHON-2
.

The problem is not in the patch, but rather in the fact

that
APR

seems configured without the thread support while Python

is

configured with thread support. mod_python.c assumes that

is

WITH_THREAD is defined, then the APR mutex functions are

available,

which is wrong. Maybe we should test for APR_HAS_THREADS

instead ?

In that case, won't this cause any problems on threaded

platforms ?


I don't know if this is a problem specific to minotaur or

to
all

version of FreeBSD. I'm currently downloading the ISOs of

FreeBSD

and I'll try using QEMU to run a FreeBSD setup on my

computer, but

that will be long and troublesome. If someone has more

clue
on this

issue, feel free to tell us :).

Regards,
Nicolas

2005/9/10, Jim Gallacher <[EMAIL PROTECTED]

Re: FreeBSD compile problem (was Getting ready for 3.2 beta 2)

[Jim Gallacher]

Gregory (Grisha) Trubetskoy wrote:


Shouldn't that be PYTHON_WITH_THREAD rather than MOD_PYTHON_WITH_THREAD?



I understand it to mean that we want the thread handling code compiled 
into mod_python.


Compiling and testing right now.

Jim



On Mon, 12 Sep 2005, Nicolas Lehuen wrote:

I've checked in a changeset wherein I define 
MOD_PYTHON_WITH_THREAD_SUPPORT

and use it everywhere WITH_THREAD was previously used. This should do the
trick ! Now if someone (like Jim) can give us his +1, that would be 
great.


Regards,
Nicolas

2005/9/12, Gregory (Grisha) Trubetskoy <[EMAIL PROTECTED]>:




Just wanted to add to this message that if Jim's version runs and tests
with the trick below (envvars is executed prior to apache start, but I
don't think the tests use it, so you'll probably just have to set 
this var

in the shell in which the tests are run), then this would be a solution
for all FreeBSD issues and we could roll a beta 3 which will have a 
great

change of being publicly released.

Grisha

On Mon, 12 Sep 2005, Gregory (Grisha) Trubetskoy wrote:



OK, found it. This should work on FreeBSD where Python is threaded and


Apache


is not.

[snip]

And, if you built apache without thread support, you may need to add 
the

following lines to $PREFIX/sbin/envvars:

LD_PRELOAD=/usr/lib/libc_r.so
export LD_PRELOAD

[snip]


On Mon, 12 Sep 2005, Gregory (Grisha) Trubetskoy wrote:



On Mon, 12 Sep 2005, Jim Gallacher wrote:


*** Warning: Linking the shared library mod_python.la against the
*** static library /usr/local/lib/python2.4/config/libpython2.4.a is


not


portable!



I think this was always there and its pretty harmless.


On qemu:
Syntax error on line 44 of
/usr/home/jim/tmp/mod_python/test/conf/test.conf:
Cannot load /usr/home/jim/tmp/mod_python/src/mod_python.so into


server:


/usr/home/jim/tmp/mod_python/src/mod_python.so: Undefined symbol
"pthread_attr_init"




This is because FreeBSD's libc comes in two versions - threaded and
non-threaded. If Python is linked against the threaded ones and Apache
against the non-thrreaded, then you get this problem. There is a 
simple
fix for this - you just cause Apache to start with threaded libs, 
but I

can't find any references to it right now and have to run off to a
meeting.

Grisha





It is quite possible I don't have things configured correctly on the
QEMU version and hence the different undefined symbol but it doesn't
really matter since it fails either way. I don't have time to
investigate further right now. I'll revisit this tonight.

Regards,
Jim


Regards,
Nicolas
#if APR_HAS_THREADS && defined(WITH_THREAD)
2005/9/11, Jim Gallacher <[EMAIL PROTECTED]
>:

FYI, I found the following note in the INSTALL file in the apache
source:

* If you are building on FreeBSD, be aware that threads will
be disabled and the prefork MPM will be used by default,
as threads do not work well with Apache on FreeBSD. If
you wish to try a threaded Apache on FreeBSD anyway, use
"./configure --enable-threads".

I'm also setting up FreeBSD under QEMU... so far so good, but
installing
anything using ports is really slow. QEMU's performance here is
just
killing me. I guess I should have read the manual first and used
the
binary packages for the software I wanted to install. :-(

Regards,
Jim

Jim Gallacher wrote:


Nicolas Lehuen wrote:


OK, I've checked in a version that compiles both on at least


Win32 and


FreeBSD. I'm just testing if APR_HAS_THREAD is defined and


only


include the apr_thread_mutex_lock and unlock calls if it is


defined.




Compiles a passes unit tests on Linux Debian sid with


mpm-prefork.




Now, on minotaur, APR_HAS_THREAD is defined as 0. Does this


mean
that


Apache is not configured for threading ? Can we assume that we


are in


the prefork model if APR_HAS_THREAD==0, so that we can skip


all the


locking code ? Because that's what we do right now.




On Debian sid with apache2.0.54 mpm-prefork, APR_HAS_THREAD ==


1.



Jim


Regards,
Nicolas

2005/9/11, Nicolas Lehuen <[EMAIL PROTECTED]







>>:



Yes, this new code is something I commited on the


29/12/2004
(I used


the "blame" function of TortoiseSVN for that). It was a


patch by


Graham to fix MODPYTHON-2
.

The problem is not in the patch, but rather in the fact


that
APR


seems configured without the thread support while Python


is


configured with thread support. mod_python.c assumes that


is


WITH_THREAD is defined, then the APR mutex functions are


available,


which is wrong. Maybe we should test for APR_HAS_THREADS


instead ?


In that case, won't this cause any problems on threaded


platforms ?



I don't know if this is a problem specific to minotaur or


to
all


version of FreeBSD. I'm currently downloading the ISOs of


FreeBSD


and I'll try using QEMU to run a FreeBSD setup on my


computer, but


that will be l

Re: FreeBSD compile problem (was Getting ready for 3.2 beta 2)

[Nicolas Lehuen]

Well, it depends :



#if(defined(WITH_THREAD) && APR_HAS_THREADS)

    #define MOD_PYTHON_WITH_THREAD_SUPPORT 1

#else

    #define MOD_PYTHON_WITH_THREAD_SUPPORT 0

#endif



It's not only a matter of Python supporting threads, we must also have
a thread-enabled APR. So that's the reason for the weird name I chose.
But I don't mind changing it !



Regards,

Nicolas2005/9/12, Gregory (Grisha) Trubetskoy <[EMAIL PROTECTED]>:
Shouldn't that be PYTHON_WITH_THREAD rather than MOD_PYTHON_WITH_THREAD?GrishaOn Mon, 12 Sep 2005, Nicolas Lehuen wrote:> I've checked in a changeset wherein I define MOD_PYTHON_WITH_THREAD_SUPPORT
> and use it everywhere WITH_THREAD was previously used. This should do the> trick ! Now if someone (like Jim) can give us his +1, that would be great.>> Regards,> Nicolas>> 2005/9/12, Gregory (Grisha) Trubetskoy <
[EMAIL PROTECTED]>:>> Just wanted to add to this message that if Jim's version runs and tests>> with the trick below (envvars is executed prior to apache start, but I
>> don't think the tests use it, so you'll probably just have to set this var>> in the shell in which the tests are run), then this would be a solution>> for all FreeBSD issues and we could roll a beta 3 which will have a great
>> change of being publicly released. Grisha On Mon, 12 Sep 2005, Gregory (Grisha) Trubetskoy wrote: OK, found it. This should work on FreeBSD where Python is threaded and
>> Apache>>> is not.>> [snip]>> And, if you built apache without thread support, you may need to add the>>> following lines to $PREFIX/sbin/envvars:
>> LD_PRELOAD=/usr/lib/libc_r.so>>> export LD_PRELOAD>> [snip]> On Mon, 12 Sep 2005, Gregory (Grisha) Trubetskoy wrote:
>>> On Mon, 12 Sep 2005, Jim Gallacher wrote:> *** Warning: Linking the shared library mod_python.la against the> *** static library /usr/local/lib/python2.4/config/libpython2.4.a is
>> not> portable! I think this was always there and its pretty harmless.> On qemu:> Syntax error on line 44 of
> /usr/home/jim/tmp/mod_python/test/conf/test.conf:> Cannot load /usr/home/jim/tmp/mod_python/src/mod_python.so into>> server:> /usr/home/jim/tmp/mod_python/src/mod_python.so: Undefined symbol
> "pthread_attr_init" This is because FreeBSD's libc comes in two versions - threaded and non-threaded. If Python is linked against the threaded ones and Apache
 against the non-thrreaded, then you get this problem. There is a simple fix for this - you just cause Apache to start with threaded libs, but I can't find any references to it right now and have to run off to a
 meeting. Grisha>> It is quite possible I don't have things configured correctly on the
> QEMU version and hence the different undefined symbol but it doesn't> really matter since it fails either way. I don't have time to> investigate further right now. I'll revisit this tonight.
>> Regards,> Jim>>> Regards,>> Nicolas>> #if APR_HAS_THREADS && defined(WITH_THREAD)
>> 2005/9/11, Jim Gallacher <[EMAIL PROTECTED]>> [EMAIL PROTECTED]
>>: FYI, I found the following note in the INSTALL file in the apache>> source: * If you are building on FreeBSD, be aware that threads will
>> be disabled and the prefork MPM will be used by default,>> as threads do not work well with Apache on FreeBSD. If>> you wish to try a threaded Apache on FreeBSD anyway, use
>> "./configure --enable-threads". I'm also setting up FreeBSD under QEMU... so far so good, but>> installing
>> anything using ports is really slow. QEMU's performance here is>> just>> killing me. I guess I should have read the manual first and used
>> the>> binary packages for the software I wanted to install. :-( Regards,>> Jim>>
>> Jim Gallacher wrote:>>> Nicolas Lehuen wrote:>>> OK, I've checked in a version that compiles both on at least
>> Win32 and FreeBSD. I'm just testing if APR_HAS_THREAD is defined and>> only include the apr_thread_mutex_lock and unlock calls if it is
>> defined.> Compiles a passes unit tests on Linux Debian sid with>> mpm-prefork.
>>> Now, on minotaur, APR_HAS_THREAD is defined as 0. Does this>> mean>> that Apache is not configured for threading ? Can we assume that we
>> are in the prefork model if APR_HAS_THREAD==0, so that we can skip>> all the locking code ? Because that's what we do right now.
> On Debian sid with apache2.0.54 mpm-prefork, APR_HAS_THREAD ==>> 1.>>>
>>> Jim>>> Regards, Nicolas 2005/9/11, Nicolas Lehuen <
[EMAIL PROTECTED]>> [EMAIL PROTECTED]> [EMAIL PROTECTED]>> [EMAIL PROTECTED]>>>:
 Yes, this new code is

Re: FreeBSD compile problem (was Getting ready for 3.2 beta 2)

[Gregory (Grisha) Trubetskoy]

I'm not sure I understand this, perhaps someone could write a message to 
the list explaining what we're doing here so there is a record. Sorry if 
I'm being slow-headed here.


To me it seems that when you use thread-related calls from Python, you 
wrap those in Python defines (WITH_THREAD) and when you use thread-related 
calls from APR, you wrap those in APR defines (APR_HAS_THREAD), and that's 
all?


In other words - what does MOD_PYTHON_WITH_THREAD_SUPPORT accomplish that 
the above does not.


Also, given:

#if(defined(WITH_THREAD) && APR_HAS_THREADS)
#define MOD_PYTHON_WITH_THREAD_SUPPORT 1
#else
#define MOD_PYTHON_WITH_THREAD_SUPPORT 0
#endif

Does this mean that if Python is compiled with thread support and APR is 
not, MOD_PYTHON_WITH_THREAD_SUPPORT is 0 which means that the thread 
safety code isn't there, but you still _can_ create threads because Python 
will let you - isn't this asking for a segfault/deadlock/whatever?


Grisha

On Mon, 12 Sep 2005, Jim Gallacher wrote:


Gregory (Grisha) Trubetskoy wrote:


Shouldn't that be PYTHON_WITH_THREAD rather than MOD_PYTHON_WITH_THREAD?



I understand it to mean that we want the thread handling code compiled into 
mod_python.


Compiling and testing right now.

Jim



On Mon, 12 Sep 2005, Nicolas Lehuen wrote:

I've checked in a changeset wherein I define 
MOD_PYTHON_WITH_THREAD_SUPPORT
and use it everywhere WITH_THREAD was previously used. This should do 
the
trick ! Now if someone (like Jim) can give us his +1, that would be 
great.


Regards,
Nicolas

2005/9/12, Gregory (Grisha) Trubetskoy <[EMAIL PROTECTED]>:




Just wanted to add to this message that if Jim's version runs and 
tests

with the trick below (envvars is executed prior to apache start, but I
don't think the tests use it, so you'll probably just have to set this 
var
in the shell in which the tests are run), then this would be a 
solution
for all FreeBSD issues and we could roll a beta 3 which will have a 
great

change of being publicly released.

Grisha

On Mon, 12 Sep 2005, Gregory (Grisha) Trubetskoy wrote:



OK, found it. This should work on FreeBSD where Python is threaded 
and


Apache


is not.

[snip]

And, if you built apache without thread support, you may need to add 
the

following lines to $PREFIX/sbin/envvars:

LD_PRELOAD=/usr/lib/libc_r.so
export LD_PRELOAD

[snip]


On Mon, 12 Sep 2005, Gregory (Grisha) Trubetskoy wrote:



On Mon, 12 Sep 2005, Jim Gallacher wrote:

*** Warning: Linking the shared library mod_python.la against 
the
*** static library 
/usr/local/lib/python2.4/config/libpython2.4.a is


not


portable!



I think this was always there and its pretty harmless.


On qemu:
Syntax error on line 44 of
/usr/home/jim/tmp/mod_python/test/conf/test.conf:
Cannot load /usr/home/jim/tmp/mod_python/src/mod_python.so into


server:


/usr/home/jim/tmp/mod_python/src/mod_python.so: Undefined symbol
"pthread_attr_init"




This is because FreeBSD's libc comes in two versions - threaded 
and
non-threaded. If Python is linked against the threaded ones and 
Apache
against the non-thrreaded, then you get this problem. There is a 
simple
fix for this - you just cause Apache to start with threaded libs, 
but I

can't find any references to it right now and have to run off to a
meeting.

Grisha





It is quite possible I don't have things configured correctly on 
the
QEMU version and hence the different undefined symbol but it 
doesn't

really matter since it fails either way. I don't have time to
investigate further right now. I'll revisit this tonight.

Regards,
Jim


Regards,
Nicolas
#if APR_HAS_THREADS && defined(WITH_THREAD)
2005/9/11, Jim Gallacher <[EMAIL PROTECTED]
>:

FYI, I found the following note in the INSTALL file in the 
apache

source:

* If you are building on FreeBSD, be aware that threads will
be disabled and the prefork MPM will be used by default,
as threads do not work well with Apache on FreeBSD. If
you wish to try a threaded Apache on FreeBSD anyway, use
"./configure --enable-threads".

I'm also setting up FreeBSD under QEMU... so far so good, but
installing
anything using ports is really slow. QEMU's performance here 
is

just
killing me. I guess I should have read the manual first and 
used

the
binary packages for the software I wanted to install. :-(

Regards,
Jim

Jim Gallacher wrote:


Nicolas Lehuen wrote:

OK, I've checked in a version that compiles both on at 
least


Win32 and


FreeBSD. I'm just testing if APR_HAS_THREAD is defined and


only

include the apr_thread_mutex_lock and unlock calls if it 
is


defined.




Compiles a passes unit tests on Linux Debian sid with


mpm-prefork.



Now, on minotaur, APR_HAS_THREAD is defined as 0. Does 
this


mean
that

Apache is not configured for threading ? Can we assume 
that we


are in

the prefork model if APR_HAS_THREAD==0, so that we can 
skip


all the


locking code ? Because that's what we do right now.




On Debian sid with apache2.0.54 mpm-pre

Re: FreeBSD compile problem (was Getting ready for 3.2 beta 2)

[Nicolas Lehuen]

Duh, this is becoming difficult :)

I was thinking that if APR_HAS_THREADS was 0, then Apache was forcibly
ran in prefork mode, so there was no need for thread safety at all,
given the fact that mod_python would only run one interpreter thread.
So if WITH_THREAD was not defined, ORAPR_HAS_THREADS was 0, then we
would not need any thread safety code. Hence the definition of
MOD_PYTHON_WITH_THREAD_SUPPORT.

You're right in writing that a user could launch a new thread in
Python, provided that WITH_THREAD is defined, even if
APR_HAS_THREADS==0. However, having a look at the parts of mod_python.c
where the thread safety was put in, I think we can safely say that
those parts are only called by mod_python (through python_handler,
python_cleanup etc who call get_interpreter). Those parts are therefore
always called in the same thread (if APR_HAS_THREADS==0, that is) and
there is no need for thread synchronization to be done (no shared data
between the main thread and the other user threads, no need to release
the GIL etc.).

BUT, I could be very, very wrong here, and your idea of reverting to a
conservative "shield python threading calls with WITH_THREAD and apr
threading code with APR_HAS_THREADS" is way more attractive to my tired
mind right now. So if you want I can revert all this
MOD_PYTHON_WITH_THREAD_SUPPORT hack.

Regards,
Nicolas2005/9/12, Gregory (Grisha) Trubetskoy <[EMAIL PROTECTED]>:
I'm not sure I understand this, perhaps someone could write a message tothe list explaining what we're doing here so there is a record. Sorry ifI'm being slow-headed here.To me it seems that when you use thread-related calls from Python, you
wrap those in Python defines (WITH_THREAD) and when you use thread-relatedcalls from APR, you wrap those in APR defines (APR_HAS_THREAD), and that'sall?In other words - what does MOD_PYTHON_WITH_THREAD_SUPPORT accomplish that
the above does not.Also, given:#if(defined(WITH_THREAD) && APR_HAS_THREADS) #define MOD_PYTHON_WITH_THREAD_SUPPORT 1#else #define MOD_PYTHON_WITH_THREAD_SUPPORT 0#endif
Does this mean that if Python is compiled with thread support and APR isnot, MOD_PYTHON_WITH_THREAD_SUPPORT is 0 which means that the threadsafety code isn't there, but you still _can_ create threads because Python
will let you - isn't this asking for a segfault/deadlock/whatever?GrishaOn Mon, 12 Sep 2005, Jim Gallacher wrote:> Gregory (Grisha) Trubetskoy wrote: Shouldn't that be PYTHON_WITH_THREAD rather than MOD_PYTHON_WITH_THREAD?
 I understand it to mean that we want the thread handling code compiled into> mod_python.>> Compiling and testing right now.>> Jim> On Mon, 12 Sep 2005, Nicolas Lehuen wrote:
> I've checked in a changeset wherein I define>>> MOD_PYTHON_WITH_THREAD_SUPPORT>>> and use it everywhere WITH_THREAD was previously used. This should do>>> the
>>> trick ! Now if someone (like Jim) can give us his +1, that would be>>> great.>> Regards,>>> Nicolas>> 2005/9/12, Gregory (Grisha) Trubetskoy <
[EMAIL PROTECTED]>:>>> Just wanted to add to this message that if Jim's version runs and tests
 with the trick below (envvars is executed prior to apache start, but I don't think the tests use it, so you'll probably just have to set this var in the shell in which the tests are run), then this would be a
 solution for all FreeBSD issues and we could roll a beta 3 which will have a great change of being publicly released.
 Grisha On Mon, 12 Sep 2005, Gregory (Grisha) Trubetskoy wrote:>> OK, found it. This should work on FreeBSD where Python is threaded
> and Apache> is not.>> [snip]>> And, if you built apache without thread support, you may need to add
> the> following lines to $PREFIX/sbin/envvars:>> LD_PRELOAD=/usr/lib/libc_r.so> export LD_PRELOAD>
> [snip]>>> On Mon, 12 Sep 2005, Gregory (Grisha) Trubetskoy wrote:> On Mon, 12 Sep 2005, Jim Gallacher wrote:
> *** Warning: Linking the shared library mod_python.la against>>> the>>> *** static library>>> /usr/local/lib/python2.4/config/libpython2.4.a is
 not>>> portable!>> I think this was always there and its pretty harmless.
> On qemu:>>> Syntax error on line 44 of>>> /usr/home/jim/tmp/mod_python/test/conf/test.conf:>>> Cannot load /usr/home/jim/tmp/mod_python/src/mod_python.so into
 server:>>> /usr/home/jim/tmp/mod_python/src/mod_python.so: Undefined symbol>>> "pthread_attr_init"
 This is because FreeBSD's libc comes in two versions - threaded>> and>> non-threaded. If Python is linked against the threaded ones and
>> Apache>> against the non-thrreaded, then you get this problem. There is a>> simple>> fix for this - you just cause Apache to start with threaded libs,
>> but I>> can't find any ref

Re: FreeBSD compile problem (was Getting ready for 3.2 beta 2)

[Gregory (Grisha) Trubetskoy]

Yep, this is getting a little hairy, but nothing we couldn't handle :-)

I did a little more research. Basically, this started with Graham's patch 
that addressed a problem with modules being reimported (or something). 

From Graham's message:




The basic problem revolves around the Python dictionary used to hold the 
set of interpreters. The code in mod_python.c is trying to use the 
Python GIL to provide exclusive access to that dictionary and any 
subsequent creation of an interpreter.


The only catch is that in creating a new interpreter, the Python core 
is, in someway I don't understand, swapping thread states at some point 
which is allowing other threads to acquire the GIL.




So what Graham's patch does is create an APR lock (interpreters_lock) and 
wrap all the access to the dictionary with calls to apr_mutex_lock/unlock.


I think the _real_ way to address this issue is to first find what is the 
problem with using the Python GIL to serialize access to the interpreters 
dictionary. Is this a Python bug, or are we not understanding GIL and 
using it improperly?


BUT, given that the above question may be complicated to answer, and that 
Graham's patch resolves the issue, another thought:


If the APR lock works, what is the point of using the GIL in addition? 
Should we just use the APR-based lock alone? I.e., where we had (after 
Graham's patch):


 #ifdef WITH_THREAD
  apr_thread_mutex_lock(interpreters_lock);
  PyEval_AcquireLock();
 #endif

we would use:

  #ifdef APR_HAS_THREAD
  apr_thread_mutex_lock(interpreters_lock);
  #endif

_without_ a call to PyEval_AcquireLock() at all.

It should compile OK, and on platforms where APR has no thread support, 
like you said, it's not an issue since no separate interpreters run in one 
process at the same time.


Grisha

On Mon, 12 Sep 2005, Nicolas Lehuen wrote:


Duh, this is becoming difficult :)

I was thinking that if APR_HAS_THREADS was 0, then Apache was forcibly ran
in prefork mode, so there was no need for thread safety at all, given the
fact that mod_python would only run one interpreter thread. So if
WITH_THREAD was not defined, ORAPR_HAS_THREADS was 0, then we would not need
any thread safety code. Hence the definition of
MOD_PYTHON_WITH_THREAD_SUPPORT.

You're right in writing that a user could launch a new thread in Python,
provided that WITH_THREAD is defined, even if APR_HAS_THREADS==0. However,
having a look at the parts of mod_python.c where the thread safety was put
in, I think we can safely say that those parts are only called by mod_python
(through python_handler, python_cleanup etc who call get_interpreter). Those
parts are therefore always called in the same thread (if APR_HAS_THREADS==0,
that is) and there is no need for thread synchronization to be done (no
shared data between the main thread and the other user threads, no need to
release the GIL etc.).

BUT, I could be very, very wrong here, and your idea of reverting to a
conservative "shield python threading calls with WITH_THREAD and apr
threading code with APR_HAS_THREADS" is way more attractive to my tired mind
right now. So if you want I can revert all this
MOD_PYTHON_WITH_THREAD_SUPPORT hack.

Regards,
Nicolas

2005/9/12, Gregory (Grisha) Trubetskoy <[EMAIL PROTECTED]>:



I'm not sure I understand this, perhaps someone could write a message to
the list explaining what we're doing here so there is a record. Sorry if
I'm being slow-headed here.

To me it seems that when you use thread-related calls from Python, you
wrap those in Python defines (WITH_THREAD) and when you use thread-related
calls from APR, you wrap those in APR defines (APR_HAS_THREAD), and that's
all?

In other words - what does MOD_PYTHON_WITH_THREAD_SUPPORT accomplish that
the above does not.

Also, given:

#if(defined(WITH_THREAD) && APR_HAS_THREADS)
#define MOD_PYTHON_WITH_THREAD_SUPPORT 1
#else
#define MOD_PYTHON_WITH_THREAD_SUPPORT 0
#endif

Does this mean that if Python is compiled with thread support and APR is
not, MOD_PYTHON_WITH_THREAD_SUPPORT is 0 which means that the thread
safety code isn't there, but you still _can_ create threads because Python
will let you - isn't this asking for a segfault/deadlock/whatever?

Grisha

On Mon, 12 Sep 2005, Jim Gallacher wrote:


Gregory (Grisha) Trubetskoy wrote:


Shouldn't that be PYTHON_WITH_THREAD rather than

MOD_PYTHON_WITH_THREAD?




I understand it to mean that we want the thread handling code compiled

into

mod_python.

Compiling and testing right now.

Jim



On Mon, 12 Sep 2005, Nicolas Lehuen wrote:


I've checked in a changeset wherein I define
MOD_PYTHON_WITH_THREAD_SUPPORT
and use it everywhere WITH_THREAD was previously used. This should do
the
trick ! Now if someone (like Jim) can give us his +1, that would be
great.

Regards,
Nicolas

2005/9/12, Gregory (Grisha) Trubetskoy <[EMAIL PROTECTED]>:




Just wanted to add to this message that if Jim's version runs and
tests
with the trick below (envvars is executed prior to

Re: FreeBSD compile problem (was Getting ready for 3.2 beta 2)

[Gregory (Grisha) Trubetskoy]

Here's a patch (this is against 3.1.2b). Untested. This replaces GIL with 
with the APR lock.


--- src/mod_python.c.orig   Mon Sep 12 16:42:28 2005
+++ src/mod_python.cMon Sep 12 17:32:26 2005
@@ -31,7 +31,9 @@
  * (In a Python dictionary) */
 static PyObject * interpreters = NULL;

+#ifdef APR_HAS_THREAD
 static apr_thread_mutex_t* interpreters_lock = 0;
+#endif

 apr_pool_t *child_init_pool = NULL;

@@ -127,9 +129,8 @@
 if (! name)
 name = MAIN_INTERPRETER;

-#ifdef WITH_THREAD
+#ifdef APR_HAS_THREAD
 apr_thread_mutex_lock(interpreters_lock);
-PyEval_AcquireLock();
 #endif

 if (!interpreters) {
@@ -156,8 +157,7 @@
 idata = (interpreterdata *)PyCObject_AsVoidPtr(p);
 }

-#ifdef WITH_THREAD
-PyEval_ReleaseLock();
+#ifdef APR_HAS_THREAD
 apr_thread_mutex_unlock(interpreters_lock);
 #endif

@@ -513,8 +513,10 @@
 /* initialze the interpreter */
 Py_Initialize();

-#ifdef WITH_THREAD
+#ifdef APR_HAS_THREAD
 
apr_thread_mutex_create(&interpreters_lock,APR_THREAD_MUTEX_UNNESTED,p);
+#endif
+#ifdef WITH_THREAD
 /* create and acquire the interpreter lock */
 PyEval_InitThreads();
 #endif




On Mon, 12 Sep 2005, Gregory (Grisha) Trubetskoy wrote:



Yep, this is getting a little hairy, but nothing we couldn't handle :-)

I did a little more research. Basically, this started with Graham's patch 
that addressed a problem with modules being reimported (or something). From 
Graham's message:




The basic problem revolves around the Python dictionary used to hold the 
set of interpreters. The code in mod_python.c is trying to use the Python 
GIL to provide exclusive access to that dictionary and any subsequent 
creation of an interpreter.


The only catch is that in creating a new interpreter, the Python core is, 
in someway I don't understand, swapping thread states at some point which 
is allowing other threads to acquire the GIL.




So what Graham's patch does is create an APR lock (interpreters_lock) and 
wrap all the access to the dictionary with calls to apr_mutex_lock/unlock.


I think the _real_ way to address this issue is to first find what is the 
problem with using the Python GIL to serialize access to the interpreters 
dictionary. Is this a Python bug, or are we not understanding GIL and using 
it improperly?


BUT, given that the above question may be complicated to answer, and that 
Graham's patch resolves the issue, another thought:


If the APR lock works, what is the point of using the GIL in addition? Should 
we just use the APR-based lock alone? I.e., where we had (after Graham's 
patch):


#ifdef WITH_THREAD
 apr_thread_mutex_lock(interpreters_lock);
 PyEval_AcquireLock();
#endif

we would use:

 #ifdef APR_HAS_THREAD
 apr_thread_mutex_lock(interpreters_lock);
 #endif

_without_ a call to PyEval_AcquireLock() at all.

It should compile OK, and on platforms where APR has no thread support, like 
you said, it's not an issue since no separate interpreters run in one process 
at the same time.


Grisha

On Mon, 12 Sep 2005, Nicolas Lehuen wrote:


Duh, this is becoming difficult :)

I was thinking that if APR_HAS_THREADS was 0, then Apache was forcibly ran
in prefork mode, so there was no need for thread safety at all, given the
fact that mod_python would only run one interpreter thread. So if
WITH_THREAD was not defined, ORAPR_HAS_THREADS was 0, then we would not 
need

any thread safety code. Hence the definition of
MOD_PYTHON_WITH_THREAD_SUPPORT.

You're right in writing that a user could launch a new thread in Python,
provided that WITH_THREAD is defined, even if APR_HAS_THREADS==0. However,
having a look at the parts of mod_python.c where the thread safety was put
in, I think we can safely say that those parts are only called by 
mod_python
(through python_handler, python_cleanup etc who call get_interpreter). 
Those
parts are therefore always called in the same thread (if 
APR_HAS_THREADS==0,

that is) and there is no need for thread synchronization to be done (no
shared data between the main thread and the other user threads, no need to
release the GIL etc.).

BUT, I could be very, very wrong here, and your idea of reverting to a
conservative "shield python threading calls with WITH_THREAD and apr
threading code with APR_HAS_THREADS" is way more attractive to my tired 
mind

right now. So if you want I can revert all this
MOD_PYTHON_WITH_THREAD_SUPPORT hack.

Regards,
Nicolas

2005/9/12, Gregory (Grisha) Trubetskoy <[EMAIL PROTECTED]>:



I'm not sure I understand this, perhaps someone could write a message to
the list explaining what we're doing here so there is a record. Sorry if
I'm being slow-headed here.

To me it seems that when you use thread-related calls from Python, you
wrap those in Python defines (WITH_THREAD) and when you use 
thread-related
calls from APR, you wrap those in APR defines (APR_HAS_THREAD), and 
that's

all?

In other words - what does MOD_PYTHON_WITH_THREAD_SU

Re: FreeBSD compile problem (was Getting ready for 3.2 beta 2)

[Jim Gallacher]

I see Grisha has posted another patch which I will test next. It's 
taking longer to test these things than I thought because of the 
slowness of qemu combined with my stumbling around in FreeBSD. Please be 
patient. :)


In the mean time I've tested with the LD_PRELOAD and 
PYTHON_WITH_THREAD_SUPPORT hacks. It compiles but the unit tests fail. 
Even though the unit tests fail, apache seems to load mod_python.so but 
has a problem initializing it. This is an improvement.


When I manually start apache with
apachectl -k start -f /home/jim/tmp/mod_python/test/conf/test.conf
I get the following in the test/logs/error_log:

[Mon Sep 12 19:49:33 2005] [notice] mod_python: Creating 8 session 
mutexes based on 256 max processes and 0 max threads.
[Mon Sep 12 19:49:33 2005] [emerg] (2)No such file or directory: 
Couldn't create accept lock


Apache then exits.

I thought I'd also try installing and running apache and test a simple 
script. Results are better, but still negative (and I'm not sure why 
it's different than using test.conf).


I installed mod_python as root and started apache with apachectl -k 
start. Apache loads mod_python.so and seems to initialize mod_python 
without a problem.


Using mod_python.publisher and the following test script:

mp/index.py
---

def index(req):
req.content_type = 'text/plain'
req.write('hello world')

The correct content is returned (hello world) but with the following 
http-error.log output:


[Mon Sep 12 21:38:57 2005] [notice] mod_python: Creating 8 session 
mutexes based on 150 max processes and 0 max threads.
[Mon Sep 12 21:38:58 2005] [notice] Apache/2.0.53 (FreeBSD) 
mod_python/3.2.0-dev-20050912 Python/2.4.1 configured -- resuming normal 
operations
[Mon Sep 12 21:39:45 2005] [notice] mod_python: (Re)importing module 
'mod_python.publisher'
[Mon Sep 12 21:39:49 2005] [notice] [client ::1] Publisher loading page 
/usr/local/www/data/mp/index.py

Fatal Python error: PyThreadState_Delete: tstate is still current
[Mon Sep 12 21:39:49 2005] [notice] child pid 8449 exit signal Abort 
trap (6)


Jim

Re: FreeBSD compile problem (was Getting ready for 3.2 beta 2)

[Jim Gallacher]

-1 for this patch. Actually, the patch itself is fine - it just doesn't 
fix the problem. The unit tests are still failings as per my previous 
messages. ie the following is getting logged in test/logs/error_log:


[Mon Sep 12 19:49:33 2005] [emerg] (2)No such file or directory: 
Couldn't create accept lock


Jim

Gregory (Grisha) Trubetskoy wrote:


Here's a patch (this is against 3.1.2b). Untested. This replaces GIL 
with with the APR lock.


--- src/mod_python.c.orig   Mon Sep 12 16:42:28 2005
+++ src/mod_python.cMon Sep 12 17:32:26 2005
@@ -31,7 +31,9 @@
  * (In a Python dictionary) */
 static PyObject * interpreters = NULL;

+#ifdef APR_HAS_THREAD
 static apr_thread_mutex_t* interpreters_lock = 0;
+#endif

 apr_pool_t *child_init_pool = NULL;

@@ -127,9 +129,8 @@
 if (! name)
 name = MAIN_INTERPRETER;

-#ifdef WITH_THREAD
+#ifdef APR_HAS_THREAD
 apr_thread_mutex_lock(interpreters_lock);
-PyEval_AcquireLock();
 #endif

 if (!interpreters) {
@@ -156,8 +157,7 @@
 idata = (interpreterdata *)PyCObject_AsVoidPtr(p);
 }

-#ifdef WITH_THREAD
-PyEval_ReleaseLock();
+#ifdef APR_HAS_THREAD
 apr_thread_mutex_unlock(interpreters_lock);
 #endif

@@ -513,8 +513,10 @@
 /* initialze the interpreter */
 Py_Initialize();

-#ifdef WITH_THREAD
+#ifdef APR_HAS_THREAD
 
apr_thread_mutex_create(&interpreters_lock,APR_THREAD_MUTEX_UNNESTED,p);

+#endif
+#ifdef WITH_THREAD
 /* create and acquire the interpreter lock */
 PyEval_InitThreads();
 #endif




On Mon, 12 Sep 2005, Gregory (Grisha) Trubetskoy wrote:



Yep, this is getting a little hairy, but nothing we couldn't handle :-)

I did a little more research. Basically, this started with Graham's 
patch that addressed a problem with modules being reimported (or 
something). From Graham's message:




The basic problem revolves around the Python dictionary used to hold 
the set of interpreters. The code in mod_python.c is trying to use 
the Python GIL to provide exclusive access to that dictionary and any 
subsequent creation of an interpreter.


The only catch is that in creating a new interpreter, the Python core 
is, in someway I don't understand, swapping thread states at some 
point which is allowing other threads to acquire the GIL.




So what Graham's patch does is create an APR lock (interpreters_lock) 
and wrap all the access to the dictionary with calls to 
apr_mutex_lock/unlock.


I think the _real_ way to address this issue is to first find what is 
the problem with using the Python GIL to serialize access to the 
interpreters dictionary. Is this a Python bug, or are we not 
understanding GIL and using it improperly?


BUT, given that the above question may be complicated to answer, and 
that Graham's patch resolves the issue, another thought:


If the APR lock works, what is the point of using the GIL in addition? 
Should we just use the APR-based lock alone? I.e., where we had (after 
Graham's patch):


#ifdef WITH_THREAD
 apr_thread_mutex_lock(interpreters_lock);
 PyEval_AcquireLock();
#endif

we would use:

 #ifdef APR_HAS_THREAD
 apr_thread_mutex_lock(interpreters_lock);
 #endif

_without_ a call to PyEval_AcquireLock() at all.

It should compile OK, and on platforms where APR has no thread 
support, like you said, it's not an issue since no separate 
interpreters run in one process at the same time.


Grisha

On Mon, 12 Sep 2005, Nicolas Lehuen wrote:


Duh, this is becoming difficult :)

I was thinking that if APR_HAS_THREADS was 0, then Apache was 
forcibly ran
in prefork mode, so there was no need for thread safety at all, given 
the

fact that mod_python would only run one interpreter thread. So if
WITH_THREAD was not defined, ORAPR_HAS_THREADS was 0, then we would 
not need

any thread safety code. Hence the definition of
MOD_PYTHON_WITH_THREAD_SUPPORT.

You're right in writing that a user could launch a new thread in Python,
provided that WITH_THREAD is defined, even if APR_HAS_THREADS==0. 
However,
having a look at the parts of mod_python.c where the thread safety 
was put
in, I think we can safely say that those parts are only called by 
mod_python
(through python_handler, python_cleanup etc who call 
get_interpreter). Those
parts are therefore always called in the same thread (if 
APR_HAS_THREADS==0,

that is) and there is no need for thread synchronization to be done (no
shared data between the main thread and the other user threads, no 
need to

release the GIL etc.).

BUT, I could be very, very wrong here, and your idea of reverting to a
conservative "shield python threading calls with WITH_THREAD and apr
threading code with APR_HAS_THREADS" is way more attractive to my 
tired mind

right now. So if you want I can revert all this
MOD_PYTHON_WITH_THREAD_SUPPORT hack.

Regards,
Nicolas

2005/9/12, Gregory (Grisha) Trubetskoy <[EMAIL PROTECTED]>:




I'm not sure I understand this, perhaps someone could write a 
message to
the list explaining wh