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Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/coccinelle/iterators/itnull.cocci | 58 |
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 000000000000..baa4297a4ed1 --- /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 ++ ) +) + ...> }
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