Debug logging with ell

Debug logging with ell

[Stotland, Inga]

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Hi all,

Quick question: can I use l_debug() when I am dynamically linking with
installed ell library (i.e., the one created with make install and
linked as -lell)?
Calling l_debug() generates no output, l_info() works just fine.

When I link with libell-private, l_debug works as expected. Something
to do with debug mem sections?

I would rather not write my own logging if l_debug() is
available.

Thanks,

Inga

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Re: Debug logging with ell

[Othman, Ossama]

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Hi Inga,

On Tue, Apr 24, 2018 at 9:33 AM, Stotland, Inga <inga.stotland@intel.com> wrote:
>
> Quick question: can I use l_debug() when I am dynamically linking with
> installed ell library (i.e., the one created with make install and
> linked as -lell)?
> Calling l_debug() generates no output, l_info() works just fine.
>
> When I link with libell-private, l_debug works as expected. Something
> to do with debug mem sections?
>
> I would rather not write my own logging if l_debug() is
> available.

Try enabling debug logging at run-time, e.g.:   l_debug_enable("*");

HTH!
-Ossama

Re: Debug logging with ell

[Stotland, Inga]

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Hi Ossama,

On Tue, 2018-04-24 at 10:35 -0700, Othman, Ossama wrote:
> Hi Inga,
> 
> On Tue, Apr 24, 2018 at 9:33 AM, Stotland, Inga <inga.stotland@intel.
> com> wrote:
> > 
> > Quick question: can I use l_debug() when I am dynamically linking
> > with
> > installed ell library (i.e., the one created with make install and
> > linked as -lell)?
> > Calling l_debug() generates no output, l_info() works just fine.
> > 
> > When I link with libell-private, l_debug works as expected.
> > Something
> > to do with debug mem sections?
> > 
> > I would rather not write my own logging if l_debug() is
> > available.
> 
> Try enabling debug logging at run-time, e.g.:   l_debug_enable("*");

I do have the following statements in my code:
l_log_set_stderr();
l_debug_enable("*");

Thanks,
Inga

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Re: Debug logging with ell

[Denis Kenzior]

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Hi Inga,

On 04/24/2018 11:33 AM, Stotland, Inga wrote:
> Hi all,
> 
> Quick question: can I use l_debug() when I am dynamically linking with
> installed ell library (i.e., the one created with make install and
> linked as -lell)?
> Calling l_debug() generates no output, l_info() works just fine.
> 

I suspect you're the first to try this, so doesn't surprise me that it 
doesn't work.  I imagine the current setup fails because the shared 
library has its own section and the executable has its own.

Probably can be solved with some macro magic, but will require a bit of 
surgery inside ell...

Regards,
-Denis

Re: Debug logging with ell

[Othman, Ossama]

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Hi Inga,

On Tue, Apr 24, 2018 at 12:56 PM, Stotland, Inga
<inga.stotland@intel.com> wrote:
> On Tue, 2018-04-24 at 10:35 -0700, Othman, Ossama wrote:
>> On Tue, Apr 24, 2018 at 9:33 AM, Stotland, Inga <inga.stotland@intel.
>> com> wrote:
>> >
>> > Quick question: can I use l_debug() when I am dynamically linking
>> > with
>> > installed ell library (i.e., the one created with make install and
>> > linked as -lell)?
>> > Calling l_debug() generates no output, l_info() works just fine.
>> >
>> > When I link with libell-private, l_debug works as expected.
>> > Something
>> > to do with debug mem sections?
>>
>> Try enabling debug logging at run-time, e.g.:   l_debug_enable("*");
>
> I do have the following statements in my code:
> l_log_set_stderr();
> l_debug_enable("*");

I suppose l_debug() wouldn't have worked when you linked against
libell-private otherwise.  Sorry.  I missed that. :)

In any case, this certainly used to work.  I was able to reproduce the
same problem you ran into as well, but I'm not sure what changed.

-Ossama

Re: Debug logging with ell

[Othman, Ossama]

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Hi Denis,

On Tue, Apr 24, 2018 at 1:30 PM, Denis Kenzior <denkenz@gmail.com> wrote:>
>> Quick question: can I use l_debug() when I am dynamically linking with
>> installed ell library (i.e., the one created with make install and
>> linked as -lell)?
>> Calling l_debug() generates no output, l_info() works just fine.
>>
>
> I suspect you're the first to try this, so doesn't surprise me that it
> doesn't work.  I imagine the current setup fails because the shared library
> has its own section and the executable has its own.
>
> Probably can be solved with some macro magic, but will require a bit of
> surgery inside ell...

This used to work for me, but prior to today the last time I tried
enabling debug logging code was probably a couple of months ago.

-Ossama

Re: Debug logging with ell

[Stotland, Inga]

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Hi Ossama, Denis,
   A. 
On Tue, 2018-04-24 at 14:35 -0700, Othman, Ossama wrote:
> Hi Denis,
> 
> On Tue, Apr 24, 2018 at 1:30 PM, Denis Kenzior <denkenz@gmail.com>
> wrote:>
> > > Quick question: can I use l_debug() when I am dynamically linking
> > > with
> > > installed ell library (i.e., the one created with make install
> > > and
> > > linked as -lell)?
> > > Calling l_debug() generates no output, l_info() works just fine.
> > > 
> > 
> > I suspect you're the first to try this, so doesn't surprise me that
> > it
> > doesn't work.  I imagine the current setup fails because the shared
> > library
> > has its own section and the executable has its own.
> > 
> > Probably can be solved with some macro magic, but will require a
> > bit of
> > surgery inside ell...
> 
> This used to work for me, but prior to today the last time I tried
> enabling debug logging code was probably a couple of months ago.
> 

Most likely to do with memory sections. One additional piece of info in
case it's helpful:
The section denoted by __start___debug[] and __stop___debug[] appears
to be shorter by size of one struct l_debug_desc when linking with
-lell (compared when compiled with internal lib). 

Inga

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Re: Debug logging with ell

[Denis Kenzior]

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Hi Inga,

On 04/24/2018 11:33 AM, Stotland, Inga wrote:
> Hi all,
> 
> Quick question: can I use l_debug() when I am dynamically linking with
> installed ell library (i.e., the one created with make install and
> linked as -lell)?
> Calling l_debug() generates no output, l_info() works just fine.

So this should work now.  I've pushed a couple of fixes upstream.

Regards,
-Denis

Re: Debug logging with ell

[Othman, Ossama]

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Hi Denis,

On Wed, Apr 25, 2018 at 1:23 PM, Denis Kenzior <denkenz@gmail.com> wrote:
> On 04/24/2018 11:33 AM, Stotland, Inga wrote:
>>
>> Quick question: can I use l_debug() when I am dynamically linking with
>> installed ell library (i.e., the one created with make install and
>> linked as -lell)?
>> Calling l_debug() generates no output, l_info() works just fine.
>
> So this should work now.  I've pushed a couple of fixes upstream.

Confirmed.  Debug logging works against a dynamically linked libell
for my use case.

Thanks!
-Ossama

Re: Debug logging with ell

[Stotland, Inga]

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Hi Denis,

On Wed, 2018-04-25 at 15:23 -0500, Denis Kenzior wrote:
> Hi Inga,
> 
> On 04/24/2018 11:33 AM, Stotland, Inga wrote:
> > Hi all,
> > 
> > Quick question: can I use l_debug() when I am dynamically linking
> > with
> > installed ell library (i.e., the one created with make install and
> > linked as -lell)?
> > Calling l_debug() generates no output, l_info() works just fine.
> 
> So this should work now.  I've pushed a couple of fixes upstream.
> 

Tested and it works now. 
Thank you,
Inga

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