This adds parallelism by default to the "coccicheck" target using
spatch's "-max" and "-index" arguments.
Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
---
v3:
- quiet bash typo, thanks to Nicholas Palix for catching that.
v2:
- added job control to clean up on interrupt, suggested by Nicolas Palix.
---
Documentation/coccinelle.txt | 5 +++++
scripts/coccicheck | 31 ++++++++++++++++++++++++++++---
2 files changed, 33 insertions(+), 3 deletions(-)
diff --git a/Documentation/coccinelle.txt b/Documentation/coccinelle.txt
index 18de785..408439d 100644
--- a/Documentation/coccinelle.txt
+++ b/Documentation/coccinelle.txt
@@ -91,6 +91,11 @@ To enable verbose messages set the V= variable, for example:
make coccicheck MODE=report V=1
+By default, coccicheck tries to run as parallel as possible. To change
+the parallelism, set the J= variable. For example, to run across 4 CPUs:
+
+ make coccicheck MODE=report J=4
+
Using Coccinelle with a single semantic patch
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
diff --git a/scripts/coccicheck b/scripts/coccicheck
index 06fcb33..446497f 100755
--- a/scripts/coccicheck
+++ b/scripts/coccicheck
@@ -2,15 +2,24 @@
SPATCH="`which ${SPATCH:=spatch}`"
+trap kill_running SIGTERM SIGINT
+declare -a SPATCH_PID
+
# The verbosity may be set by the environmental parameter V=
# as for example with 'make V=1 coccicheck'
if [ -n "$V" -a "$V" != "0" ]; then
- VERBOSE=1
+ VERBOSE="$V"
else
VERBOSE=0
fi
+if [ -z "$J" ]; then
+ NPROC=$(getconf _NPROCESSORS_ONLN)
+else
+ NPROC="$J"
+fi
+
FLAGS="$SPFLAGS -very_quiet"
# spatch only allows include directories with the syntax "-I include"
@@ -61,12 +70,28 @@ if [ "$ONLINE" = "0" ] ; then
fi
run_cmd() {
+ local i
if [ $VERBOSE -ne 0 ] ; then
- echo "Running: $@"
+ echo "Running ($NPROC in parallel): $@"
fi
- eval $@
+ for i in $(seq 0 $(( NPROC - 1)) ); do
+ eval "$@ -max $NPROC -index $i &"
+ SPATCH_PID[$i]=$!
+ if [ $VERBOSE -eq 2 ] ; then
+ echo "${SPATCH_PID[$i]} running"
+ fi
+ done
+ wait
}
+kill_running() {
+ for i in $(seq $(( NPROC - 1 )) ); do
+ if [ $VERBOSE -eq 2 ] ; then
+ echo "Killing ${SPATCH_PID[$i]}"
+ fi
+ kill ${SPATCH_PID[$i]} 2>/dev/null
+ done
+}
coccinelle () {
COCCI="$1"
--
1.7.9.5
--
Kees Cook
Chrome OS Security
--
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