#!/bin/sh
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#
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# Run a herd test and check the result against a "Result:" comment within
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# the litmus test. If the verification result does not match that specified
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# in the litmus test, this script prints an error message prefixed with
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# "^^^" and exits with a non-zero status. It also outputs verification
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# results to a file whose name is that of the specified litmus test, but
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# with ".out" appended.
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#
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# Usage:
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# checklitmus.sh file.litmus
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#
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# The LINUX_HERD_OPTIONS environment variable may be used to specify
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# arguments to herd, which default to "-conf linux-kernel.cfg". Thus,
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# one would normally run this in the directory containing the memory model,
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# specifying the pathname of the litmus test to check.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, you can access it online at
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# http://www.gnu.org/licenses/gpl-2.0.html.
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#
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# Copyright IBM Corporation, 2018
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#
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# Author: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
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litmus=$1
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herdoptions=${LINUX_HERD_OPTIONS--conf linux-kernel.cfg}
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if test -f "$litmus" -a -r "$litmus"
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then
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:
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else
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echo ' --- ' error: \"$litmus\" is not a readable file
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exit 255
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fi
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if grep -q '^ \* Result: ' $litmus
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then
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outcome=`grep -m 1 '^ \* Result: ' $litmus | awk '{ print $3 }'`
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else
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outcome=specified
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fi
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echo Herd options: $herdoptions > $litmus.out
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/usr/bin/time herd7 -o ~/tmp $herdoptions $litmus >> $litmus.out 2>&1
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grep "Herd options:" $litmus.out
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grep '^Observation' $litmus.out
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if grep -q '^Observation' $litmus.out
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then
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:
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else
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cat $litmus.out
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echo ' ^^^ Verification error'
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echo ' ^^^ Verification error' >> $litmus.out 2>&1
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exit 255
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fi
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if test "$outcome" = DEADLOCK
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then
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echo grep 3 and 4
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if grep '^Observation' $litmus.out | grep -q 'Never 0 0$'
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then
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ret=0
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else
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echo " ^^^ Unexpected non-$outcome verification"
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echo " ^^^ Unexpected non-$outcome verification" >> $litmus.out 2>&1
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ret=1
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fi
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elif grep '^Observation' $litmus.out | grep -q $outcome || test "$outcome" = Maybe
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then
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ret=0
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else
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echo " ^^^ Unexpected non-$outcome verification"
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echo " ^^^ Unexpected non-$outcome verification" >> $litmus.out 2>&1
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ret=1
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fi
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tail -2 $litmus.out | head -1
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exit $ret
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