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7f904d7e | 1 | // SPDX-License-Identifier: GPL-2.0-only |
5c340501 NP |
2 | /// list_for_each_entry uses its first argument to get from one element of |
3 | /// the list to the next, so it is usually not a good idea to reassign it. | |
4 | /// The first rule finds such a reassignment and the second rule checks | |
5 | /// that there is a path from the reassignment back to the top of the loop. | |
6 | /// | |
7 | // Confidence: High | |
7f904d7e TG |
8 | // Copyright: (C) 2010 Nicolas Palix, DIKU. |
9 | // Copyright: (C) 2010 Julia Lawall, DIKU. | |
10 | // Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. | |
5c340501 NP |
11 | // URL: http://coccinelle.lip6.fr/ |
12 | // Comments: | |
93f14468 | 13 | // Options: --no-includes --include-headers |
5c340501 NP |
14 | |
15 | virtual context | |
16 | virtual org | |
17 | virtual report | |
18 | ||
6851ba1a | 19 | @r exists@ |
5c340501 NP |
20 | iterator name list_for_each_entry; |
21 | expression x,E; | |
22 | position p1,p2; | |
23 | @@ | |
24 | ||
25 | list_for_each_entry@p1(x,...) { <... x =@p2 E ...> } | |
26 | ||
27 | @depends on context && !org && !report@ | |
28 | expression x,E; | |
29 | position r.p1,r.p2; | |
30 | statement S; | |
31 | @@ | |
32 | ||
33 | *x =@p2 E | |
34 | ... | |
35 | list_for_each_entry@p1(x,...) S | |
36 | ||
37 | // ------------------------------------------------------------------------ | |
38 | ||
39 | @back depends on (org || report) && !context exists@ | |
40 | expression x,E; | |
41 | position r.p1,r.p2; | |
42 | statement S; | |
43 | @@ | |
44 | ||
45 | x =@p2 E | |
46 | ... | |
47 | list_for_each_entry@p1(x,...) S | |
48 | ||
49 | @script:python depends on back && org@ | |
50 | p1 << r.p1; | |
51 | p2 << r.p2; | |
52 | @@ | |
53 | ||
54 | cocci.print_main("iterator",p1) | |
55 | cocci.print_secs("update",p2) | |
56 | ||
57 | @script:python depends on back && report@ | |
58 | p1 << r.p1; | |
59 | p2 << r.p2; | |
60 | @@ | |
61 | ||
62 | msg = "iterator with update on line %s" % (p2[0].line) | |
63 | coccilib.report.print_report(p1[0],msg) |