1 // SPDX-License-Identifier: GPL-2.0-only
2 /// Use kmemdup rather than duplicating its implementation
3 ///
4 // Confidence: High
5 // Copyright: (C) 2010-2012 Nicolas Palix.
6 // Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6.
7 // Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6.
8 // URL: https://coccinelle.gitlabpages.inria.fr/website
9 // Comments:
10 // Options: --no-includes --include-headers
11
12 virtual patch
13 virtual context
14 virtual org
15 virtual report
16
17 @r1@
18 expression from,to;
19 expression flag;
20 position p;
21 @@
22
23 to = \(kmalloc@p\|kzalloc@p\)(strlen(from) + 1,flag);
24
25 @r2@
26 expression x,from,to;
27 expression flag,E1;
28 position p;
29 @@
30
31 x = strlen(from) + 1;
32 ... when != \( x = E1 \| from = E1 \)
33 to = \(kmalloc@p\|kzalloc@p\)(x,flag);
34
35 @depends on patch@
36 expression from,to,size,flag;
37 position p != {r1.p,r2.p};
38 statement S;
39 @@
40
41 - to = \(kmalloc@p\|kzalloc@p\)(size,flag);
42 + to = kmemdup(from,size,flag);
43 if (to==NULL || ...) S
44 - memcpy(to, from, size);
45
46 @r depends on !patch@
47 expression from,to,size,flag;
48 position p != {r1.p,r2.p};
49 statement S;
50 @@
51
52 * to = \(kmalloc@p\|kzalloc@p\)(size,flag);
53 if (to==NULL || ...) S
54 * memcpy(to, from, size);
55
56 @script:python depends on org@
57 p << r.p;
58 @@
59
60 coccilib.org.print_todo(p[0], "WARNING opportunity for kmemdup")
61
62 @script:python depends on report@
63 p << r.p;
64 @@
65
66 coccilib.report.print_report(p[0], "WARNING opportunity for kmemdup")
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