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| author | Julia Lawall <Julia.Lawall@lip6.fr> | 2018-08-03 18:32:11 +0200 |
|---|---|---|
| committer | Masahiro Yamada <yamada.masahiro@socionext.com> | 2018-08-14 01:58:49 +0200 |
| commit | 09d4d9648bd01a4c124fcc30dd0c31503975e8c2 (patch) | |
| tree | 8060cb4a4b28c630f6afc8fc5a9be1307e14b58a /scripts/coccinelle/tests | |
| parent | kbuild: remove deprecated host-progs variable (diff) | |
| download | linux-09d4d9648bd01a4c124fcc30dd0c31503975e8c2.tar.xz linux-09d4d9648bd01a4c124fcc30dd0c31503975e8c2.zip | |
Coccinelle: doubletest: reduce side effect false positives
Ensure that the cited expression is not a function call or an
assignment to reduce the chance of false positives.
Slightly modify the warning message to indicate another source
of false positves.
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'scripts/coccinelle/tests')
| -rw-r--r-- | scripts/coccinelle/tests/doubletest.cocci | 34 |
1 files changed, 26 insertions, 8 deletions
diff --git a/scripts/coccinelle/tests/doubletest.cocci b/scripts/coccinelle/tests/doubletest.cocci index 78d74c22ca12..7af2ce7eb9bf 100644 --- a/scripts/coccinelle/tests/doubletest.cocci +++ b/scripts/coccinelle/tests/doubletest.cocci @@ -1,6 +1,7 @@ /// Find &&/|| operations that include the same argument more than once -//# A common source of false positives is when the argument performs a side -//# effect. +//# A common source of false positives is when the expression, or +//# another expresssion in the same && or || operation, performs a +//# side effect. /// // Confidence: Moderate // Copyright: (C) 2010 Nicolas Palix, DIKU. GPLv2. @@ -20,20 +21,37 @@ position p; @@ ( -* E@p - || ... || E + E@p || ... || E | -* E@p - && ... && E + E@p && ... && E ) -@script:python depends on org@ +@bad@ +expression r.E,e1,e2,fn; +position r.p; +assignment operator op; +@@ + +( +E@p +& + <+... \(fn(...)\|e1 op e2\|e1++\|e1--\|++e1\|--e1\) ...+> +) + +@depends on context && !bad@ +expression r.E; +position r.p; +@@ + +*E@p + +@script:python depends on org && !bad@ p << r.p; @@ cocci.print_main("duplicated argument to && or ||",p) -@script:python depends on report@ +@script:python depends on report && !bad@ p << r.p; @@ |