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Date: Wed, 04 Jan 2012 11:37:22 +0100
To: Shrikanth Kamath <shrikanth07@gmail.com>,freebsd-hackers@freebsd.org
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Subject: Re: DTrace and CTF interpretation
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At 10:34 04/01/2012, Shrikanth Kamath wrote:
>I am facing problem with the CTF interpretation of a member in structure,
>
>e.g
>struct foo {
>     struct bar a;
>     uint32_t   b;
>     ...
>     uint32_t  prefix[1];
>}
>
>When converting the above member prefix, I enabled the CTF debugs,
>here is the o/p
>
>DEBUG: die 87324: mem 87636: creating member
>DEBUG: die 87324: got mloff ffffffffffffffc0
>DEBUG: die 87324: mem 87636: created "prefix" (off 4294966784 sz 0)
>
>When I use DTrace to dump this prefix field (in a structure that is
>argument to a function)
>it gives invalid access error. I guess that is expected because of the
>strange offset.
>
>Anybody knowing how to fix this in CTF convert path?

Perhaps DTrace gives the error because size is 0. Offset isn't strange.

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