[lttng-dev] Poor handling of spaces in field names

[Mathieu Desnoyers]

* David OShea (David.OShea at quantum.com) wrote:
> Hi all,
> 
> I never expected to be able to put spaces in field names, but I accidentally did so and had quite a bit of trouble debugging the problem, as 'babeltrace -v <path>' just gave me:
> 
> """
> error syntax error
> [error] Error creating AST
> [warning] Unable to open trace metadata for path "[...]".
> [warning] [Context] Cannot open_trace of the format [...] .
> 
> [warning] [Context] cannot open trace "[...]" from [...] for reading.
> """
> 
> I had to set BABELTRACE_DEBUG=1 to see the metadata scanner and parser debug output to figure out what I'd done wrong :)
> 
> Would it be possible and practical to have the macros generate some
> dummy code using the field names in order to detect them not being
> valid identifiers at compile time?  Better error messages from the
> metadata parser would also be nice, but I imagine that's probably not
> so easy.

babeltrace now has much more verbose error messages (see master branch).
If it is still an issue with you, please open a feature request against
babeltrace on bugs.lttng.org.

Thanks,

Mathieu

> 
> Thanks in advance,
> David
> 
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-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com