Date:   Thu, 5 Oct 2017 12:20:14 -0700
From:   Liam Breck <liam@...workimprov.net>
To:     Julia Lawall <Julia.Lawall@...6.fr>
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

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.

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

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..."

> +      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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