From: Julia Lawall <julia.lawall@lip6.fr>
To: Timur Tabi <timur@kernel.org>
Cc: cocci <cocci@systeme.lip6.fr>
Subject: Re: [Cocci] Can I pass a variable from a Python script in one rule to another rule in the same .cocci file?
Date: Sat, 5 Jan 2019 07:25:38 +0100 (CET) [thread overview]
Message-ID: <alpine.DEB.2.21.1901050714330.2519@hadrien> (raw)
In-Reply-To: <CAOZdJXWUhEcm8HgJFE2L1dqgMRX51X+LF=b=Obzj55pU4gc3QA@mail.gmail.com>
On Fri, 4 Jan 2019, Timur Tabi wrote:
> In one rule, I have some Python code that parses a string literal to
> see what it looks like. If I detect a specific pattern, then I want
> another rule (that has no Python code) to act differently.
>
> More specifically, if a string literal passed as a parameter to
> DBG_PRINTF() starts with "NVRM: ", then I want my script to replace
> DBG_PRINTF with NV_PRINTF. This works today.
>
> If the string does not begin with "NVRM:", however, then I want
> DBG_PRINTF changed to NV_PRINTF_EX instead.
>
> If this can't work, an alternative would be to create a second script
> that handles DBG_PRINTF to NV_PRINTF_EX. However, it would need to
> abort the change if the Python script detects that NVRM: doesn't
> exist. So is there a way for Python to return a value that says,
> "Woah, stop and undo everything you just did!"
I think that you want to use cocci.include_match(False)
In your python script, make the checks that you want, and then if you are
not satisfied with the results, use cocci.include_match(False) to get the
curent match of the metavariables to disappear. You may need to rematch
something to get the information needed for the second change option.
julia
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prev parent reply other threads:[~2019-01-05 6:25 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-04 21:57 [Cocci] Can I pass a variable from a Python script in one rule to another rule in the same .cocci file? Timur Tabi
2019-01-05 6:25 ` Julia Lawall [this message]
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