system tap unable to refer a structure definition

Frank Ch. Eigler fche at
Sun May 7 11:16:59 EDT 2017

gadrenayan wrote:

> [...]
> c = @cast($frags[0]->f_addr, "volioship_hdr_t", 
> "/root/ngadre/unixvm-cvs/src/common/kernel/vxvm/ioship_cvm.h")
> [...]
> The header file is locally available on the machine.
> [...]
> semantic error: type definition 'volioship_hdr_t' not found in '
> /root/ngadre/unixvm-cvs/src/common/kernel/vxvm/ioship_cvm.h': operator
> '@cast' at :46:6
> [...]
> How do I make system tap refer to this structure.

@cast requires use of the syntax "kernel<header.h>" to process such
files, because they involve different compiler invocations.  That may
not be all there is to it.  Rerun stap with --vp 04 or somesuch to
get some verbose tracing of its attempts to process that header.

- FChE

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