[lttng-dev] Syntax error running lttng

[lttng-dev] Syntax error running lttng

[Merlin via lttng-dev]

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Hi,

 

I have compiled LTTNG for ARM but when I try to run the executable, I get
this error:

 

lttng: line 1: syntax error: unexpected "("

 

E.G.        lttng create my-kernel-session
--output=/mnt/sd1/nfs/temp/Innotech/lttng/my-kernel-trace

lttng list --kernel

lttng-sessiond

  all produce the same error.

 

There were no compiler errors.  I am at a loss to understand what it is
complaining about from the message.

 

Modules seem to load fine.

 

~ # lsmod

Module                  Size  Used by    Tainted: G

lttng_ring_buffer_client_discard    20480  0

lttng_ring_buffer_client_mmap_discard    20480  0

lttng_ring_buffer_metadata_mmap_client    16384  0

lttng_ring_buffer_metadata_client    16384  0

lttng_ring_buffer_event_notifier_client    16384  0

lttng_ring_buffer_client_overwrite    20480  0

lttng_tracer         1167360  6
lttng_ring_buffer_client_discard,lttng_ring_buffer_client_mmap_discard,lttng
_ring_buffer_metadata_mmap_client,lttng_ring_buffer_metadata_client,lttng_ri
ng_buffer_event_notifier_client,lttng_ring_buffer_client_overwrite

lttng_kprobes          16384  1 lttng_tracer

lttng_lib_ring_buffer    57344  7
lttng_ring_buffer_client_discard,lttng_ring_buffer_client_mmap_discard,lttng
_ring_buffer_metadata_mmap_client,lttng_ring_buffer_metadata_client,lttng_ri
ng_buffer_event_notifier_client,lttng_ring_buffer_client_overwrite,lttng_tra
cer

lttng_kretprobes       16384  1 lttng_tracer

lttng_statedump        20480  1 lttng_tracer

lttng_wrapper          16384  2 lttng_tracer,lttng_statedump

lttng_clock            16384  4
lttng_ring_buffer_client_discard,lttng_ring_buffer_client_mmap_discard,lttng
_ring_buffer_client_overwrite,lttng_tracer

 

Any suggestions appreciated.

 

Thank you.

 

Merlin


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Re: [lttng-dev] Syntax error running lttng

[Jonathan Rajotte-Julien via lttng-dev]

Hi,

On Tue, Jun 01, 2021 at 10:48:13AM +1000, Merlin via lttng-dev wrote:
> Hi,
> 
>  
> 
> I have compiled LTTNG for ARM but when I try to run the executable, I get
> this error:

Do you have any of the logs for the lttng-tools project?

That would be `config.log` and the output from `make` and `make install`

> 
>  
> 
> lttng: line 1: syntax error: unexpected "("

Hmmm that does not look like an error from a elf executable.

Do you have any bash or shell alias for the lttng command?

Please provide the output of the following commands:
  $ file $(which lttng)
  $ head -n 10 $(which lttng)



> lttng-sessiond

If this happens also on the `lttng-sessiond` via command line but works using a
service, it would point to weird shell setup.
> 
>   all produce the same error.
> 
>  
> 
> There were no compiler errors.  I am at a loss to understand what it is
> complaining about from the message.

Me too.

> 
>  
> 
> Modules seem to load fine.

Modules are loaded by the lttng-sessiond executable. Here only the CLI
executable seems to be having some problem.

-- 
Jonathan Rajotte-Julien
EfficiOS
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Re: [lttng-dev] Syntax error running lttng

[Paul Coward via lttng-dev]

Hi,

Thank you for the response.

I have it installed on a small ARM computer that does not feature many
tools, specifically file & which are missing.

I don't have any shell aliases and the output of find is:
    ~ # find / -name "lttng" 2>/dev/null
    /mnt/sd1/modulesLTTNG/lttng
    /mnt/sd1/modulesLTTNG/lttng/usr/local/bin/lttng
    /mnt/sd1/modulesLTTNG/lttng/usr/local/lib/lttng
    ~ #
Limiting it to finding files is only the one:
    ~ # find / -name "lttng" -type f 2>/dev/null
    /mnt/sd1/modulesLTTNG/lttng/usr/local/bin/lttng
    ~ #

head -n 10 /mnt/sd1/modulesLTTNG/lttng/usr/local/bin/lttng
    outputs binary, examining it on the build computer shows it is an ELF
executable built for ARM

I didn't set up the shell so that could be questionable, but I'm not sure
exactly how.

I couldn't find that error message in the lttng source but to me it looked a
little like errors I have seen from libXML (possibly reaching for straws).

The error message looks like it is trying to read some sort of configuration
file and failing.


This is a link to the config.log
https://drive.google.com/file/d/1_3QQEbfMcnS2_jX-MzJFO1JdGAArRRwW/view?usp=s
haring

I don't have the make output available at the moment but I can regenerate it
tomorrow if it will help.



-----Original Message-----
From: Jonathan Rajotte-Julien <jonathan.rajotte-julien@efficios.com> 
Sent: Wednesday, 2 June 2021 04:56
To: public@triplanets.com
Cc: lttng-dev@lists.lttng.org
Subject: Re: [lttng-dev] Syntax error running lttng

Hi,

On Tue, Jun 01, 2021 at 10:48:13AM +1000, Merlin via lttng-dev wrote:
> Hi,
> 
>  
> 
> I have compiled LTTNG for ARM but when I try to run the executable, I 
> get this error:

Do you have any of the logs for the lttng-tools project?

That would be `config.log` and the output from `make` and `make install`

> 
>  
> 
> lttng: line 1: syntax error: unexpected "("

Hmmm that does not look like an error from a elf executable.

Do you have any bash or shell alias for the lttng command?

Please provide the output of the following commands:
  $ file $(which lttng)
  $ head -n 10 $(which lttng)



> lttng-sessiond

If this happens also on the `lttng-sessiond` via command line but works
using a service, it would point to weird shell setup.
> 
>   all produce the same error.
> 
>  
> 
> There were no compiler errors.  I am at a loss to understand what it 
> is complaining about from the message.

Me too.

> 
>  
> 
> Modules seem to load fine.

Modules are loaded by the lttng-sessiond executable. Here only the CLI
executable seems to be having some problem.

--
Jonathan Rajotte-Julien
EfficiOS

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lttng-dev mailing list
lttng-dev@lists.lttng.org
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Re: [lttng-dev] Syntax error running lttng

[Jonathan Rajotte-Julien via lttng-dev]

Hi,

Side note: not sure what is wrong with my email setup or the mailing list but I
cannot see the reply you sent in my email folder, but it is available here: 

https://lists.lttng.org/pipermail/lttng-dev/2021-June/030021.html

In any case, this look strangely like the problem seen in [1][2]. Considering
your cross compilation setup I would take a deeper look at the generated
executable both locally and when on the device.
The `file` command is a must here I think.

[1] https://unix.stackexchange.com/questions/336436/syntax-error-unexpected-when-execute-a-compiled-c-program
[2] https://unix.stackexchange.com/questions/499641/syntax-error-unexpected-when-execute-a-cross-compiled-pjsip-binary-in-arm

Not sure if this is exactly your problem. `strace` might give a bit more info
on what is going on and at least see if the problem is lttng or anything else. 

Cheers

On Tue, Jun 01, 2021 at 10:48:13AM +1000, Merlin via lttng-dev wrote:
> Hi,
> 
>  
> 
> I have compiled LTTNG for ARM but when I try to run the executable, I get
> this error:
> 
>  
> 
> lttng: line 1: syntax error: unexpected "("
> 
>  
> 
> E.G.        lttng create my-kernel-session
> --output=/mnt/sd1/nfs/temp/Innotech/lttng/my-kernel-trace
> 
> lttng list --kernel
> 
> lttng-sessiond
> 
>   all produce the same error.
> 
>  
> 
> There were no compiler errors.  I am at a loss to understand what it is
> complaining about from the message.
> 
>  
> 
> Modules seem to load fine.
> 
>  
> 
> ~ # lsmod
> 
> Module                  Size  Used by    Tainted: G
> 
> lttng_ring_buffer_client_discard    20480  0
> 
> lttng_ring_buffer_client_mmap_discard    20480  0
> 
> lttng_ring_buffer_metadata_mmap_client    16384  0
> 
> lttng_ring_buffer_metadata_client    16384  0
> 
> lttng_ring_buffer_event_notifier_client    16384  0
> 
> lttng_ring_buffer_client_overwrite    20480  0
> 
> lttng_tracer         1167360  6
> lttng_ring_buffer_client_discard,lttng_ring_buffer_client_mmap_discard,lttng
> _ring_buffer_metadata_mmap_client,lttng_ring_buffer_metadata_client,lttng_ri
> ng_buffer_event_notifier_client,lttng_ring_buffer_client_overwrite
> 
> lttng_kprobes          16384  1 lttng_tracer
> 
> lttng_lib_ring_buffer    57344  7
> lttng_ring_buffer_client_discard,lttng_ring_buffer_client_mmap_discard,lttng
> _ring_buffer_metadata_mmap_client,lttng_ring_buffer_metadata_client,lttng_ri
> ng_buffer_event_notifier_client,lttng_ring_buffer_client_overwrite,lttng_tra
> cer
> 
> lttng_kretprobes       16384  1 lttng_tracer
> 
> lttng_statedump        20480  1 lttng_tracer
> 
> lttng_wrapper          16384  2 lttng_tracer,lttng_statedump
> 
> lttng_clock            16384  4
> lttng_ring_buffer_client_discard,lttng_ring_buffer_client_mmap_discard,lttng
> _ring_buffer_client_overwrite,lttng_tracer
> 
>  
> 
> Any suggestions appreciated.
> 
>  
> 
> Thank you.
> 
>  
> 
> Merlin
> 

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> lttng-dev mailing list
> lttng-dev@lists.lttng.org
> https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev


-- 
Jonathan Rajotte-Julien
EfficiOS
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