87 lines
1.9 KiB
Plaintext
87 lines
1.9 KiB
Plaintext
|
///
|
||
|
|
/// Use kzalloc rather than kmalloc followed by memset with 0
|
||
|
|
///
|
||
|
|
/// This considers some simple cases that are common and easy to validate
|
||
|
|
/// Note in particular that there are no ...s in the rule, so all of the
|
||
|
|
/// matched code has to be contiguous
|
||
|
|
///
|
||
|
|
// Confidence: High
|
||
|
|
// Copyright: (C) 2009-2010 Julia Lawall, Nicolas Palix, DIKU. GPLv2.
|
||
|
|
// Copyright: (C) 2009-2010 Gilles Muller, INRIA/LiP6. GPLv2.
|
||
|
|
// URL: http://coccinelle.lip6.fr/rules/kzalloc.html
|
||
|
|
// Options: --no-includes --include-headers
|
||
|
|
//
|
||
|
|
// Keywords: kmalloc, kzalloc
|
||
|
|
// Version min: < 2.6.12 kmalloc
|
||
|
|
// Version min: 2.6.14 kzalloc
|
||
|
|
//
|
||
|
|
|
||
|
|
virtual context
|
||
|
|
virtual patch
|
||
|
|
virtual org
|
||
|
|
virtual report
|
||
|
|
|
||
|
|
//----------------------------------------------------------
|
||
|
|
// For context mode
|
||
|
|
//----------------------------------------------------------
|
||
|
|
|
||
|
|
@depends on context@
|
||
|
|
type T, T2;
|
||
|
|
expression x;
|
||
|
|
expression E1,E2;
|
||
|
|
statement S;
|
||
|
|
@@
|
||
|
|
|
||
|
|
* x = (T)kmalloc(E1,E2);
|
||
|
|
if ((x==NULL) || ...) S
|
||
|
|
* memset((T2)x,0,E1);
|
||
|
|
|
||
|
|
//----------------------------------------------------------
|
||
|
|
// For patch mode
|
||
|
|
//----------------------------------------------------------
|
||
|
|
|
||
|
|
@depends on patch@
|
||
|
|
type T, T2;
|
||
|
|
expression x;
|
||
|
|
expression E1,E2;
|
||
|
|
statement S;
|
||
|
|
@@
|
||
|
|
|
||
|
|
- x = (T)kmalloc(E1,E2);
|
||
|
|
+ x = kzalloc(E1,E2);
|
||
|
|
if ((x==NULL) || ...) S
|
||
|
|
- memset((T2)x,0,E1);
|
||
|
|
|
||
|
|
//----------------------------------------------------------
|
||
|
|
// For org mode
|
||
|
|
//----------------------------------------------------------
|
||
|
|
|
||
|
|
@r depends on org || report@
|
||
|
|
type T, T2;
|
||
|
|
expression x;
|
||
|
|
expression E1,E2;
|
||
|
|
statement S;
|
||
|
|
position p;
|
||
|
|
@@
|
||
|
|
|
||
|
|
x = (T)kmalloc@p(E1,E2);
|
||
|
|
if ((x==NULL) || ...) S
|
||
|
|
memset((T2)x,0,E1);
|
||
|
|
|
||
|
|
@script:python depends on org@
|
||
|
|
p << r.p;
|
||
|
|
x << r.x;
|
||
|
|
@@
|
||
|
|
|
||
|
|
msg="%s" % (x)
|
||
|
|
msg_safe=msg.replace("[","@(").replace("]",")")
|
||
|
|
coccilib.org.print_todo(p[0], msg_safe)
|
||
|
|
|
||
|
|
@script:python depends on report@
|
||
|
|
p << r.p;
|
||
|
|
x << r.x;
|
||
|
|
@@
|
||
|
|
|
||
|
|
msg="WARNING: kzalloc should be used for %s, instead of kmalloc/memset" % (x)
|
||
|
|
coccilib.report.print_report(p[0], msg)
|