Re: [Cocci] Checking two error messages

[Julia Lawall <julia.lawall@inria.fr>]

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On Sun, 8 Mar 2020, Markus Elfring wrote:

> Hello,
>
> I have tried the following small script variant out again for
> the semantic patch language.
>
> @display@
> expression action;
> expression* pointer, target, x;
> identifier member, var;
> statement is;
> type t;
> @@
> (
> *t* var = pointer->member;
> |
> *pointer->member;
> |
> *target = pointer->member;
> |
> *t* var = pointer->member(...);
> |
> *pointer->member(...);
> |
> *target = pointer->member(...);
> )
>  ... when any
>      when != pointer = \( action(...) \| x \)
> *if (
> (    !pointer
> |    pointer == NULL
> )

pointer == NULL would have been sufficient (not related to the noted
problems).

>     )
>   is
>
>
> The software “Coccinelle 1.0.8-00029-ga549b9f0” (OCaml 4.10.0) reports the following error messages
> for an analysis approach on source files from “Linux next-20200306”.
>
>
> elfring@Sonne:~/Projekte/Linux/next-patched> spatch ~/Projekte/Coccinelle/janitor/show_pointer_access_before_null_check3.cocci drivers/firmware/efi/runtime-wrappers.c
> …
> Fatal error: exception File "engine/ctlcocci_integration.ml", line 361, characters 4-10: Assertion failed
> elfring@Sonne:~/Projekte/Linux/next-patched> spatch ~/Projekte/Coccinelle/janitor/show_pointer_access_before_null_check3.cocci net/core/dev.c
> …
> no position information

Thanks for the reports.  These are related to dead code and will be
addressed sooner (second case) or later (first case).

julia

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