linux-kernel - [PATCH tip/core/rcu 15/32] tools/memory-model: Make judgelitmus.sh ransack .litmus.out files

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Message-Id: <20191003002650.11249-15-paulmck@kernel.org>
Date:   Wed,  2 Oct 2019 17:26:33 -0700
From:   paulmck@...nel.org
To:     linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        mingo@...nel.org
Cc:     stern@...land.harvard.edu, parri.andrea@...il.com, will@...nel.org,
        peterz@...radead.org, boqun.feng@...il.com, npiggin@...il.com,
        dhowells@...hat.com, j.alglave@....ac.uk, luc.maranget@...ia.fr,
        akiyks@...il.com, "Paul E. McKenney" <paulmck@...ux.ibm.com>
Subject: [PATCH tip/core/rcu 15/32] tools/memory-model: Make judgelitmus.sh ransack .litmus.out files

From: "Paul E. McKenney" <paulmck@...ux.ibm.com>

The judgelitmus.sh script currently relies solely on the "Result:"
comment in the .litmus file.  This is problematic when using the --hw
argument, because it is necessary to check the hardware model against
LKMM even in the absence of "Result:" comments.

This commit therefore modifies judgelitmus.sh to check the observation
in a .litmus.out file, in case one was generated by a previous LKMM run.

Signed-off-by: Paul E. McKenney <paulmck@...ux.ibm.com>
---
 tools/memory-model/scripts/judgelitmus.sh | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/tools/memory-model/scripts/judgelitmus.sh b/tools/memory-model/scripts/judgelitmus.sh
index 6f3c600..fe9131f 100755
--- a/tools/memory-model/scripts/judgelitmus.sh
+++ b/tools/memory-model/scripts/judgelitmus.sh
@@ -8,7 +8,9 @@
 # is provided, this is assumed to be a hardware test, and the output is
 # assumed to be in file.HW.litmus.out, where "HW" is the --hw argument.
 # In addition, non-Sometimes verification results will be noted, but
-# forgiven.
+# forgiven.  Furthermore, if there is no "Result:" comment but there is
+# an LKMM .litmus.out file, the observation in that file will be used
+# to judge the assembly-language verification.
 #
 # Usage:
 #	judgelitmus.sh file.litmus
@@ -32,9 +34,11 @@ fi
 if test -z "$LKMM_HW_MAP_FILE"
 then
 	litmusout=$litmus.out
+	lkmmout=
 else
 	litmusout="`echo $litmus |
 		sed -e 's/\.litmus$/.'${LKMM_HW_MAP_FILE}'.litmus/'`.out"
+	lkmmout=$litmus.out
 fi
 if test -f "$LKMM_DESTDIR/$litmusout" -a -r "$LKMM_DESTDIR/$litmusout"
 then
@@ -46,6 +50,9 @@ fi
 if grep -q '^ \* Result: ' $litmus
 then
 	outcome=`grep -m 1 '^ \* Result: ' $litmus | awk '{ print $3 }'`
+elif test -n "$LKMM_HW_MAP_FILE" && grep -q '^Observation' $LKMM_DESTDIR/$lkmmout > /dev/null 2>&1
+then
+	outcome=`grep -m 1 '^Observation ' $LKMM_DESTDIR/$lkmmout | awk '{ print $3 }'`
 else
 	outcome=specified
 fi
-- 
2.9.5