95 lines
1.6 KiB
Plaintext
95 lines
1.6 KiB
Plaintext
/// 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) 2010-2012 Nicolas Palix. GPLv2.
|
|
// Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6. GPLv2.
|
|
// Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6. GPLv2.
|
|
// URL: http://coccinelle.lip6.fr/
|
|
// Comments:
|
|
// Options: --no-includes --include-headers
|
|
|
|
virtual patch
|
|
virtual context
|
|
virtual org
|
|
virtual report
|
|
|
|
@depends on 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
|
|
+ )
|
|
)
|
|
...> }
|
|
|
|
@r depends on !patch exists@
|
|
iterator I;
|
|
expression x,E;
|
|
position p1,p2;
|
|
@@
|
|
|
|
*I@p1(x,...)
|
|
{ ... when != x = E
|
|
(
|
|
* x@p2 == NULL
|
|
|
|
|
* x@p2 != NULL
|
|
)
|
|
... when any
|
|
}
|
|
|
|
@script:python depends on org@
|
|
p1 << r.p1;
|
|
p2 << r.p2;
|
|
@@
|
|
|
|
cocci.print_main("iterator-bound variable",p1)
|
|
cocci.print_secs("useless NULL test",p2)
|
|
|
|
@script:python depends on report@
|
|
p1 << r.p1;
|
|
p2 << r.p2;
|
|
@@
|
|
|
|
msg = "ERROR: iterator variable bound on line %s cannot be NULL" % (p1[0].line)
|
|
coccilib.report.print_report(p2[0], msg)
|