Re: [dpdk-dev] [EXT] Re: [PATCH] devtools: fix check symbol change script

[Neil Horman <nhorman@tuxdriver.com>]

On Thu, Mar 19, 2020 at 09:15:50PM +0530, Nithin Dabilpuram wrote:
> On Thu, Mar 19, 2020 at 11:40:39AM -0400, Neil Horman wrote:
> > External Email
> > 
> > ----------------------------------------------------------------------
> > On Thu, Mar 19, 2020 at 03:56:03PM +0100, David Marchand wrote:
> > > On Thu, Mar 19, 2020 at 3:44 PM Nithin Dabilpuram
> > > <ndabilpuram@marvell.com> wrote:
> > > >
> > > > Fix check symbol change script to detect new diff file when
> > > > it is in between  "--- /dev/null" to "b/lib/...".
> > > > Current awk line expects line to start with "a/..."
> > > > which is not always true for all diffs.
> > > > As a result if in_map was '1' earlier, it will not be changed
> > > > to '0' and we get check patch errors which are not true as the non
> > > > version.map files get interpreted as version map file.
> > > >
> > > > Fixes: 4bec48184e33 ("devtools: add checks for ABI symbol addition")
> > > > Cc: nhorman@tuxdriver.com
> > > > Cc: stable@dpdk.org
> > > 
> > > There was a previous attempt at fixing this that did not get a review.
> > > https://urldefense.proofpoint.com/v2/url?u=http-3A__patchwork.dpdk.org_patch_56303_&d=DwIBAg&c=nKjWec2b6R0mOyPaz7xtfQ&r=FZ_tPCbgFOh18zwRPO9H0yDx8VW38vuapifdDfc8SFQ&m=HnuykZkNgy_2cx1i0_QuR-C_vdVYLTJ9rSUA1dCM7WI&s=TW-ZZ_dYy8x6EcvJHtYrv9vaIHSmd0GshvClMwiWPi4&e= 
> > > 
> > > I prefer the last submitted patch as it is simpler, but maybe I missed
> > > something in Bing patch.
> > > 
> > > Neil, wdyt?
> > > 
> > I'm not sure why I didn't review the previous patch you refrenced, apologies for
> > that.
> > 
> > That said, I'm not sure how this patch detects /dev/null patterns. It looks like
> > you still expect all lines to start with [+-] [ab]...
> 
> It doesn't detect /dev/null but the line following /dev/null will start with
> "b/...". So this checks for .map in that line as well.
> 
Ah, in that case, I'd really be fine with either fix.

Acked-by: Neil Horman <nhorman@tuxdriver.com>
> > 
> > Neil
> > 
> > > 
> > > -- 
> > > David Marchand
> > > 
> > > 
> > > >
> > > > Signed-off-by: Nithin Dabilpuram <ndabilpuram@marvell.com>
> > > > ---
> > > > Note: We have two examples where checkpatch errors are because of this
> > > > because the version.map file change comes earlier in the diff. Because of
> > > > this bug, any new file change that comes after version.map file diff
> > > > as "/dev/null" to "b/.." gets misdetected as version.map file.
> > > > * https://urldefense.proofpoint.com/v2/url?u=http-3A__patches.dpdk.org_patch_66878_&d=DwIBAg&c=nKjWec2b6R0mOyPaz7xtfQ&r=FZ_tPCbgFOh18zwRPO9H0yDx8VW38vuapifdDfc8SFQ&m=HnuykZkNgy_2cx1i0_QuR-C_vdVYLTJ9rSUA1dCM7WI&s=0szl1YpYLwfb1OF-R5H4_ci3f5XjBUHFrHVp-LdROFI&e= 
> > > > * https://urldefense.proofpoint.com/v2/url?u=https-3A__patchwork.dpdk.org_patch_66900_&d=DwIBAg&c=nKjWec2b6R0mOyPaz7xtfQ&r=FZ_tPCbgFOh18zwRPO9H0yDx8VW38vuapifdDfc8SFQ&m=HnuykZkNgy_2cx1i0_QuR-C_vdVYLTJ9rSUA1dCM7WI&s=ugH7B1XKoFQEEopU0sJgqKGwjDJS9Kl9OsijSazmyRc&e= 
> > > >  devtools/check-symbol-change.sh | 4 ++--
> > > >  1 file changed, 2 insertions(+), 2 deletions(-)
> > > >
> > > > diff --git a/devtools/check-symbol-change.sh b/devtools/check-symbol-change.sh
> > > > index c5434f3..19ce82f 100755
> > > > --- a/devtools/check-symbol-change.sh
> > > > +++ b/devtools/check-symbol-change.sh
> > > > @@ -17,13 +17,13 @@ build_map_changes()
> > > >                 # map files are altered, and all section/symbol names
> > > >                 # appearing between a triggering of this rule and the
> > > >                 # next trigger of this rule are associated with this file
> > > > -               /[-+] a\/.*\.map/ {map=$2; in_map=1}
> > > > +               /[-+] [ab]\/.*\.map/ {map=$2; in_map=1}
> > > >
> > > >                 # Same pattern as above, only it matches on anything that
> > > >                 # does not end in 'map', indicating we have left the map chunk.
> > > >                 # When we hit this, turn off the in_map variable, which
> > > >                 # supresses the subordonate rules below
> > > > -               /[-+] a\/.*\.[^map]/ {in_map=0}
> > > > +               /[-+] [ab]\/.*\.[^map]/ {in_map=0}
> > > >
> > > >                 # Triggering this rule, which starts a line and ends it
> > > >                 # with a { identifies a versioned section.  The section name is
> > > > --
> > > > 2.8.4
> > > >
> > > 
> > > 
>