[PATCH 1/7] Add a target to use the Coccinelle checker

Nicolas Palix
2010-06-06T15:15:24Z

A 'coccicheck' target is added. It can be called with four different
modes. Each one generates a different kind of output, i.e. context,
patch, org, report, according to the corresponding mode to be
activated.

The new target calls the 'coccicheck' front-end in the 'scripts'
directory with the MODE argument. Every SmPL file in the
subdirectories of 'scripts/coccinelle' is then given to the front-end
and applied to the entire source tree.

The four modes behave as follows:

'report' generates a list in the following format:
file:line:column-column: message

'patch' proposes a fix, when possible.

'context' highlights lines of interest and their context in a
diff-like style. Lines of interest are indicated with '-'.

'org' generates a report in the Org mode format of Emacs.

Signed-off-by: Nicolas Palix <npalix@diku.dk>
Signed-off-by: Julia Lawall <julia@diku.dk>
---
MAINTAINERS | 10 +++++++++
Makefile | 10 ++++++--
scripts/Makefile.help | 3 ++
scripts/coccicheck | 54 +++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 74 insertions(+), 3 deletions(-)
create mode 100644 scripts/Makefile.help
create mode 100755 scripts/coccicheck

diff --git a/MAINTAINERS b/MAINTAINERS
index 67accd7..5b3c95e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1569,6 +1569,16 @@ L: platform-driver-x86@vger.kernel.org
S: Supported
F: drivers/platform/x86/classmate-laptop.c

+COCCINELLE/Semantic Patches (SmPL)
+M: Julia Lawall <julia@diku.dk>
+M: Gilles Muller <Gilles.Muller@lip6.fr>
+M: Nicolas Palix <npalix@diku.dk>
+L: cocci@diku.dk (moderated for non-subscribers)
+W: http://coccinelle.lip6.fr/
+S: Supported
+F: scripts/coccinelle/
+F: scripts/coccicheck
+
CODA FILE SYSTEM
M: Jan Harkes <jaharkes@cs.cmu.edu>
M: coda@cs.cmu.edu
diff --git a/Makefile b/Makefile
index 654c31a..09d9d08 100644
--- a/Makefile
+++ b/Makefile
@@ -412,7 +412,7 @@ endif
# of make so .config is not included in this case either (for *config).

no-dot-config-targets := clean mrproper distclean \
- cscope TAGS tags help %docs check% \
+ cscope TAGS tags help %docs check% coccicheck \
include/linux/version.h headers_% \
kernelrelease kernelversion

@@ -1279,8 +1279,9 @@ help:
@echo ' includecheck - Check for duplicate included header files'
@echo ' export_report - List the usages of all exported symbols'
@echo ' headers_check - Sanity check on exported headers'
- @echo ' headerdep - Detect inclusion cycles in headers'; \
- echo ''
+ @echo ' headerdep - Detect inclusion cycles in headers'
+ @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
+ @echo ''
@echo 'Kernel packaging:'
@$(MAKE) $(build)=$(package-dir) help
@echo ''
@@ -1439,6 +1440,9 @@ versioncheck:
-name '*.[hcS]' -type f -print | sort \
| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl

+coccicheck:
+ $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
+
namespacecheck:
$(PERL) $(srctree)/scripts/namespace.pl

diff --git a/scripts/Makefile.help b/scripts/Makefile.help
new file mode 100644
index 0000000..d03608f
--- /dev/null
+++ b/scripts/Makefile.help
@@ -0,0 +1,3 @@
+
+checker-help:
+ @echo ' coccicheck - Check with Coccinelle.'
diff --git a/scripts/coccicheck b/scripts/coccicheck
new file mode 100755
index 0000000..037424b
--- /dev/null
+++ b/scripts/coccicheck
@@ -0,0 +1,54 @@
+#!/bin/sh
+
+SPATCH="`which ${SPATCH:=spatch}`"
+
+if [ ! -x "$SPATCH" ]; then
+ echo 'spatch is part of the Coccinelle project and is available at http://coccinelle.lip6.fr/'
+ exit 1
+fi
+
+if [ "$MODE" = "" ] ; then
+ echo 'You have not explicitly specify the mode to use. Fallback to "report".'
+ echo 'You can specify the mode with "make coccicheck MODE=<mode>"'
+ echo 'Available modes are: report, patch, context, org'
+ MODE="report"
+fi
+
+echo ''
+echo 'Please check for false positives in the output before submitting a patch.'
+echo 'When using "patch" mode, carefully review the patch before submitting it.'
+echo ''
+
+function coccinelle {
+ COCCI="$1"
+ DIR="$2"
+
+ OPT=`grep "Option" $COCCI | cut -d':' -f2`
+ FILE=`echo $COCCI | sed "s|$DIR/||"`
+
+ echo "Processing `basename $COCCI` with option(s) \"$OPT\""
+ echo 'Message example to submit a patch:'
+
+ sed -e '/\/\/\//!d' -e 's|^///||' $COCCI
+
+ echo ' The semantic patch that makes this change is available'
+ echo " in $FILE."
+ echo ''
+ echo ' More information about semantic patching is available at'
+ echo ' http://coccinelle.lip6.fr/'
+ echo ''
+
+# The option '-parse_cocci' can be used to syntaxically check the SmPL files.
+#
+# $SPATCH -D $MODE -very_quiet -parse_cocci $COCCI $OPT > /dev/null
+
+ $SPATCH -D $MODE -very_quiet -sp_file $COCCI $OPT -dir $DIR
+}
+
+if [ "$COCCI" = "" ] ; then
+ for f in `find $srctree/scripts/coccinelle/ -name '*.cocci' -type f | sort`; do
+ coccinelle $f $srctree;
+ done
+else
+ coccinelle $COCCI $srctree
+fi
--
1.7.0.4