[dpdk-dev,PATCHv4,1/5] buildtools: Add tool to check EXPERIMENTAL api exports

  This tools reads the given version map for a directory, and checks to
ensure that, for each symbol listed in the export list, the corresponding
definition is tagged as __experimental, erroring out if its not.  In this
way, we can ensure that the EXPERIMENTAL api is kept in sync with the tags

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
CC: Thomas Monjalon <thomas@monjalon.net>
CC: "Mcnamara, John" <john.mcnamara@intel.com>
CC: Bruce Richardson <bruce.richardson@intel.com>
---
 buildtools/experimentalsyms.sh | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100755 buildtools/experimentalsyms.sh
  

Hi Neil,

Sorry for the very late review.
I thought review had been done by others but it seems not.
Please find my comments below.

13/12/2017 16:17, Neil Horman:
>  create mode 100755 buildtools/experimentalsyms.sh

When adding a new file, you must reference it in MAINTAINERS.
Please add it in the section "ABI versioning".

> --- /dev/null
> +++ b/buildtools/experimentalsyms.sh

I think the file name should include the word "check".
What about check-experimental-syms.sh ?

> @@ -0,0 +1,35 @@
> +#!/bin/sh

You must insert a SPDX license and copyright here.

> +if [ -d $MAPFILE ]
> +then
> +	exit 0
> +fi
> +
> +if [ -d $OBJFILE ]
> +then
> +	exit 0
> +fi

Why checking for not being a directory?
I guess you could check being a readable file (-r)?
Should it return an error?

> +for i in `awk 'BEGIN {found=0}
> +		/.*EXPERIMENTAL.*/ {found=1}
> +		/.*}.*;/ {found=0}
> +		/.*;/ {if (found == 1) print $1}' $MAPFILE`
> +do
> +	SYM=`echo $i | sed -e"s/;//"`
> +	objdump -t $OBJFILE | grep -q "\.text.*$SYM"
> +	IN_TEXT=$?
> +	objdump -t $OBJFILE | grep -q "\.text\.experimental.*$SYM"
> +	IN_EXP=$?
> +	if [ $IN_TEXT -eq 0 -a $IN_EXP -ne 0 ]
> +	then
> +		echo "$SYM is not flagged as experimental"
> +		echo "but is listed in version map"
> +		echo "Please add __experimental to the definition of $SYM"
> +		exit 1
> +	fi
> +done
> +exit 0

exit 0 is useless at the end of a script.
  

On Sun, Jan 21, 2018 at 07:31:31PM +0100, Thomas Monjalon wrote:
> Hi Neil,
> 
> Sorry for the very late review.
> I thought review had been done by others but it seems not.
> Please find my comments below.
> 
> 13/12/2017 16:17, Neil Horman:
> >  create mode 100755 buildtools/experimentalsyms.sh
> 
> When adding a new file, you must reference it in MAINTAINERS.
> Please add it in the section "ABI versioning".
> 
yup

> > --- /dev/null
> > +++ b/buildtools/experimentalsyms.sh
> 
> I think the file name should include the word "check".
> What about check-experimental-syms.sh ?
> 
> > @@ -0,0 +1,35 @@
> > +#!/bin/sh
> 
> You must insert a SPDX license and copyright here.
> 
Will do.

> > +if [ -d $MAPFILE ]
> > +then
> > +	exit 0
> > +fi
> > +
> > +if [ -d $OBJFILE ]
> > +then
> > +	exit 0
> > +fi
> 
> Why checking for not being a directory?
> I guess you could check being a readable file (-r)?
> Should it return an error?
> 
The objfile check is out of date (had it in place initially, and is no longer
needed).  the mapfile check is there because dpdk apps use the same C_TO_O rule
and have no mapfile variable set.

> > +for i in `awk 'BEGIN {found=0}
> > +		/.*EXPERIMENTAL.*/ {found=1}
> > +		/.*}.*;/ {found=0}
> > +		/.*;/ {if (found == 1) print $1}' $MAPFILE`
> > +do
> > +	SYM=`echo $i | sed -e"s/;//"`
> > +	objdump -t $OBJFILE | grep -q "\.text.*$SYM"
> > +	IN_TEXT=$?
> > +	objdump -t $OBJFILE | grep -q "\.text\.experimental.*$SYM"
> > +	IN_EXP=$?
> > +	if [ $IN_TEXT -eq 0 -a $IN_EXP -ne 0 ]
> > +	then
> > +		echo "$SYM is not flagged as experimental"
> > +		echo "but is listed in version map"
> > +		echo "Please add __experimental to the definition of $SYM"
> > +		exit 1
> > +	fi
> > +done
> > +exit 0
> 
> exit 0 is useless at the end of a script.
Its there for clarity of exit value.  I prefer to be expicit in that.
Neil