[lttng-dev] [error] at line 4295: token "(": syntax error, unexpected LPAREN, expecting SEMICOLON or COMMA

[Mathieu Desnoyers]

----- On Oct 6, 2016, at 4:14 PM, Staffan Tjernstrom staffan at eternaltraveller.com wrote:

>> On 2016-10-06 14:14, Staffan Tjernstrom wrote:
>> Hi Staffan,
>>
>> Are you able to provide the metadata file?  Even better, would you be
>> able to share your tracepoint definition file?
>>
>> Simon
>>
> Hi Simon,
> 
> Here's one of the pid's metadata files, it does look a bit suspicious
> to my untrained eye. I've also enclosed the three tracepoint
> definition files that are in play.
> 
> One thing to be aware of is that our application suite is in C++, so
> we have mangled symbols in the definitions.

See

TRACEPOINT_EVENT(
   sapphire,
   ip_error,
   TP_ARGS(
      int, lineno_arg,
      int, socket_arg,
      int, errno_arg
     ),
   TP_FIELDS(
ctf_integer( int, source_line, lineno_arg )
      ctf_integer( int, socket, socket_arg )
      ctf_integer( int, errno, errno_arg )
      ctf_string( error_text, strerror( errno_arg ) )
      )
   )
TRACEPOINT_LOGLEVEL( sapphire, ip_error, TRACE_ERR )

It maps to this in the metadata at line 4295:
event {
        name = "sapphire:ip_error3";
        id = 349;
        stream_id = 0;
        loglevel = 13;
        fields := struct {
                integer { size = 32; align = 8; signed = 1; encoding = none; base = 10; } _source_line;
                string _address;
                integer { size = 32; align = 8; signed = 1; encoding = none; base = 10; } _port;
                integer { size = 32; align = 8; signed = 1; encoding = none; base = 10; } _(*__errno_location ());
                string _error_text;
        };
};

I suspect that "error_text" is actually a C++ macro that maps to "(*__errno_location ())",
which is unexpected.

Thanks,

Mathieu

> 
> 
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-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com