Message-ID: <alpine.DEB.2.20.1710052122380.2626@hadrien>
Date:   Thu, 5 Oct 2017 21:25:52 +0200 (CEST)
From:   Julia Lawall <julia.lawall@...6.fr>
To:     Liam Breck <liam@...workimprov.net>
cc:     Sebastian Reichel <sebastian.reichel@...labora.co.uk>,
        Pali Rohár <pali.rohar@...il.com>,
        Linux PM mailing list <linux-pm@...r.kernel.org>,
        kernel-janitors@...r.kernel.org,
        Gilles Muller <Gilles.Muller@...6.fr>,
        Nicolas Palix <nicolas.palix@...g.fr>,
        Michal Marek <mmarek@...e.com>, cocci@...teme.lip6.fr,
        linux-kernel <linux-kernel@...r.kernel.org>,
        kbuild test robot <fengguang.wu@...el.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>
Subject: Re: [PATCH] coccinelle: api: detect duplicate chip data arrays



On Thu, 5 Oct 2017, Liam Breck wrote:

> Hi, sorry for slow reply...
>
> Can we patch something to make this script run by default on
> bq7xxxx_battery_i2c build? If so let's do that.

I don't think anything is set up for that.  But any changes to the file
should be checked by the 0-day bot.

> Also maybe the name of the script should include "bq27xxx_data"?

OK

> Few more comments below...
>
> On Sun, Oct 1, 2017 at 5:42 AM, Julia Lawall <Julia.Lawall@...6.fr> wrote:
> > This semantic patch detects duplicate arrays declared using BQ27XXX_DATA
> > within a single structure.  It is currently specific to the file
> > drivers/power/supply/bq27xxx_battery.c.
> >
> > Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>
> >
> > ---
> >  scripts/coccinelle/api/battery.cocci |  161 +++++++++++++++++++++++++++++++++++
> >  1 file changed, 161 insertions(+)
> >
> > diff --git a/scripts/coccinelle/api/battery.cocci b/scripts/coccinelle/api/battery.cocci
> > new file mode 100644
> > index 0000000..77c145a
> > --- /dev/null
> > +++ b/scripts/coccinelle/api/battery.cocci
> > @@ -0,0 +1,161 @@
> > +/// Detect BQ27XXX_DATA structures with identical registers, dm registers or
> > +/// properties.
> > +//# Doesn't unfold macros used in register or property fields.
> > +//# Requires OCaml scripting
> > +///
> > +// Confidence: High
> > +// Copyright: (C) 2017 Julia Lawall, Inria/LIP6, GPLv2.
> > +// URL: http://coccinelle.lip6.fr/
> > +// Requires: 1.0.7
> > +// Keywords: BQ27XXX_DATA
> > +
> > +virtual report
> > +
> > +@...tialize:ocaml@
> > +@@
> > +
> > +let print_report p msg =
> > +  let p = List.hd p in
> > +  Printf.printf "%s:%d:%d-%d: %s" p.file p.line p.col p.col_end msg
> > +
> > +@str depends on report@
> > +type t;
> > +identifier i,i1,i2;
> > +expression e1,e2;
> > +@@
> > +
> > +t i[] = {
> > +  ...,
> > +  [e1] = BQ27XXX_DATA(i1,...),
> > +  ...,
> > +  [e2] = BQ27XXX_DATA(i2,...),
> > +  ...,
> > +};
> > +
> > +@...ipt:ocaml tocheck@
> > +i1 << str.i1;
> > +i2 << str.i2;
> > +i1regs; i2regs;
> > +i1dmregs; i2dmregs;
> > +i1props; i2props;
> > +@@
> > +
> > +if not(i1 = i2)
> > +then
> > +  begin
> > +    i1regs := make_ident (i1 ^ "_regs");
> > +    i2regs := make_ident (i2 ^ "_regs");
> > +    i1dmregs := make_ident (i1 ^ "_dm_regs");
> > +    i2dmregs := make_ident (i2 ^ "_dm_regs");
> > +    i1props := make_ident (i1 ^ "_props");
> > +    i2props := make_ident (i2 ^ "_props")
> > +  end
> > +
> > +(* ---------------------------------------------------------------- *)
> > +
> > +@...regs1@
> > +typedef u8;
> > +identifier tocheck.i1regs;
> > +initializer list i1regs_vals;
> > +position p1;
> > +@@
> > +
> > +u8 i1regs@p1[...] = { i1regs_vals, };
> > +
> > +@...regs2@
> > +identifier tocheck.i2regs;
> > +initializer list i2regs_vals;
> > +position p2;
> > +@@
> > +
> > +u8 i2regs@p2[...] = { i2regs_vals, };
> > +
> > +@...ipt:ocaml@
> > +(_,i1regs_vals) << getregs1.i1regs_vals;
> > +(_,i2regs_vals) << getregs2.i2regs_vals;
> > +i1regs << tocheck.i1regs;
> > +i2regs << tocheck.i2regs;
> > +p1 << getregs1.p1;
> > +p2 << getregs2.p2;
> > +@@
> > +
> > +if i1regs < i2regs &&
> > +   List.sort compare i1regs_vals = List.sort compare i2regs_vals
> > +then
> > +  let msg =
> > +    Printf.sprintf
> > +      "WARNING %s and %s (line %d) have the same registers\n"
>
> "are identical" vs "have the same..."

OK, I guess identical would be appropriate for regsand dm_regs, but
perhaps not for properties because there the same values might be in a
different order.

julia

> > +      i1regs i2regs (List.hd p2).line in
> > +  print_report p1 msg
> > +
> > +(* ---------------------------------------------------------------- *)
> > +
> > +@...dmregs1@
> > +identifier tocheck.i1dmregs;
> > +initializer list i1dmregs_vals;
> > +position p1;
> > +@@
> > +
> > +struct bq27xxx_dm_reg i1dmregs@p1[] = { i1dmregs_vals, };
> > +
> > +@...dmregs2@
> > +identifier tocheck.i2dmregs;
> > +initializer list i2dmregs_vals;
> > +position p2;
> > +@@
> > +
> > +struct bq27xxx_dm_reg i2dmregs@p2[] = { i2dmregs_vals, };
> > +
> > +@...ipt:ocaml@
> > +(_,i1dmregs_vals) << getdmregs1.i1dmregs_vals;
> > +(_,i2dmregs_vals) << getdmregs2.i2dmregs_vals;
> > +i1dmregs << tocheck.i1dmregs;
> > +i2dmregs << tocheck.i2dmregs;
> > +p1 << getdmregs1.p1;
> > +p2 << getdmregs2.p2;
> > +@@
> > +
> > +if i1dmregs < i2dmregs &&
> > +   List.sort compare i1dmregs_vals = List.sort compare i2dmregs_vals
> > +then
> > +  let msg =
> > +    Printf.sprintf
> > +      "WARNING %s and %s (line %d) have the same dm registers\n"
>
> "are identical" vs "have the same..."
>
> > +      i1dmregs i2dmregs (List.hd p2).line in
> > +  print_report p1 msg
> > +
> > +(* ---------------------------------------------------------------- *)
> > +
> > +@...props1@
> > +identifier tocheck.i1props;
> > +initializer list[n1] i1props_vals;
> > +position p1;
> > +@@
> > +
> > +enum power_supply_property i1props@p1[] = { i1props_vals, };
> > +
> > +@...props2@
> > +identifier tocheck.i2props;
> > +initializer list[n2] i2props_vals;
> > +position p2;
> > +@@
> > +
> > +enum power_supply_property i2props@p2[] = { i2props_vals, };
> > +
> > +@...ipt:ocaml@
> > +(_,i1props_vals) << getprops1.i1props_vals;
> > +(_,i2props_vals) << getprops2.i2props_vals;
> > +i1props << tocheck.i1props;
> > +i2props << tocheck.i2props;
> > +p1 << getprops1.p1;
> > +p2 << getprops2.p2;
> > +@@
> > +
> > +if i1props < i2props &&
> > +   List.sort compare i1props_vals = List.sort compare i2props_vals
> > +then
> > +  let msg =
> > +    Printf.sprintf
> > +      "WARNING %s and %s (line %d) have the same properties\n"
>
> "are identical" vs "have the same..."
>
>
> > +      i1props i2props (List.hd p2).line in
> > +  print_report p1 msg
> >
> --
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