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 <[email protected]>
---
scripts/coccinelle/tests/doubletest.cocci | 34 ++++++++++++++++++++++--------
1 file changed, 26 insertions(+), 8 deletions(-)
diff --git a/scripts/coccinelle/tests/doubletest.cocci b/scripts/coccinelle/tests/doubletest.cocci
index 78d74c2..7af2ce7 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;
@@
2018-08-04 1:32 GMT+09:00 Julia Lawall <[email protected]>:
> 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 <[email protected]>
>
Applied to linux-kbuild. Thanks!
(Please send a reminder
if there are more coccinelle patches I missed.)
> ---
> scripts/coccinelle/tests/doubletest.cocci | 34 ++++++++++++++++++++++--------
> 1 file changed, 26 insertions(+), 8 deletions(-)
>
> diff --git a/scripts/coccinelle/tests/doubletest.cocci b/scripts/coccinelle/tests/doubletest.cocci
> index 78d74c2..7af2ce7 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;
> @@
>
>
--
Best Regards
Masahiro Yamada