aboutsummaryrefslogtreecommitdiff
path: root/scripts/coccinelle
diff options
context:
space:
mode:
authorNicolas Palix <npalix@diku.dk>2010-08-24 17:39:02 +0200
committerMichal Marek <mmarek@suse.cz>2010-08-31 11:37:53 +0200
commitafc48a82fafe55dbeeaf7c0d83d29cf279cb1c70 (patch)
tree5d6c5ff7aa828aeb7d3470ee969c6888526d5ee1 /scripts/coccinelle
parent4045159253a49a56d117148d67bc86a72762a0d3 (diff)
downloadlinux-linaro-afc48a82fafe55dbeeaf7c0d83d29cf279cb1c70.tar.gz
Coccinelle: Add iterators/itnull.cocci
Many iterators have the property that the first argument is always bound to a real list element, never NULL. False positives arise for some iterators that do not have this property, or in cases when the loop cursor is reassigned. The latter should only happen when the matched code is on the way to a loop exit (break, goto, or return). Signed-off-by: Nicolas Palix <npalix@diku.dk> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Michal Marek <mmarek@suse.cz>
Diffstat (limited to 'scripts/coccinelle')
-rw-r--r--scripts/coccinelle/iterators/itnull.cocci58
1 files changed, 58 insertions, 0 deletions
diff --git a/scripts/coccinelle/iterators/itnull.cocci b/scripts/coccinelle/iterators/itnull.cocci
new file mode 100644
index 00000000000..baa4297a4ed
--- /dev/null
+++ b/scripts/coccinelle/iterators/itnull.cocci
@@ -0,0 +1,58 @@
+/// Many iterators have the property that the first argument is always bound
+/// to a real list element, never NULL. False positives arise for some
+/// iterators that do not have this property, or in cases when the loop
+/// cursor is reassigned. The latter should only happen when the matched
+/// code is on the way to a loop exit (break, goto, or return).
+///
+// Confidence: Moderate
+// Copyright: (C) 2010 Nicolas Palix, DIKU. GPLv2.
+// Copyright: (C) 2010 Julia Lawall, DIKU. GPLv2.
+// Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. GPLv2.
+// URL: http://coccinelle.lip6.fr/
+// Comments:
+// Options: -no_includes -include_headers
+
+virtual patch
+
+@@
+iterator I;
+expression x,E,E1,E2;
+statement S,S1,S2;
+@@
+
+I(x,...) { <...
+(
+- if (x == NULL && ...) S
+|
+- if (x != NULL || ...)
+ S
+|
+- (x == NULL) ||
+ E
+|
+- (x != NULL) &&
+ E
+|
+- (x == NULL && ...) ? E1 :
+ E2
+|
+- (x != NULL || ...) ?
+ E1
+- : E2
+|
+- if (x == NULL && ...) S1 else
+ S2
+|
+- if (x != NULL || ...)
+ S1
+- else S2
+|
++ BAD(
+ x == NULL
++ )
+|
++ BAD(
+ x != NULL
++ )
+)
+ ...> } \ No newline at end of file