C label probes

[Mike Mason]

I don't think label support has been implemented yet.  We should remove this from the documentation until it is. For now, to probe within a function you need to specify the source line number (e.g., kernel.statement("*@kernel/sched.c:2917")).

Mike

Haley Thrapp wrote
> Section 4.2 of the language reference indicates that C labels can be used as probe points and that the specifications for a probe point can be used in combination.  I was under the impression I could specify the C label with the '.statement'.  I attempted to use the following line:
> 
> probe kernel..function("do_generic_mapping_read").statement("page_ok")
> 
> semantic error: probe point mismatch at position 2 (alternatives: call inline return) while resolving probe point kernel.function("do_generic_mapping_read").statement("page_ok")
> 
> Can someone correct me on how I can specify the C label "page_ok" in mm/filemap.c in function do_generic_mapping_read ?
> 
> 
> Thanks,
> Haley Thrapp
> 
> 
> 
> 
> 
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