1 // SPDX-License-Identifier: GPL-2.0-only
2 /// Find missing clk_puts.
3 ///
4 //# This only signals a missing clk_put when there is a clk_put later
5 //# in the same function.
6 //# False positives can be due to loops.
7 //
8 // Confidence: Moderate
9 // Copyright: (C) 2012 Julia Lawall, INRIA/LIP6.
10 // Copyright: (C) 2012 Gilles Muller, INRIA/LiP6.
11 // URL: https://coccinelle.gitlabpages.inria.fr/website
12 // Comments:
13 // Options:
14
15 virtual context
16 virtual org
17 virtual report
18
19 @clk@
20 expression e;
21 statement S,S1;
22 int ret;
23 position p1,p2,p3;
24 @@
25
26 e = clk_get@p1(...)
27 ... when != clk_put(e)
28 if (<+...e...+>) S
29 ... when any
30 when != clk_put(e)
31 when != if (...) { ... clk_put(e); ... }
32 (
33 if (ret == 0) S1
34 |
35 if (...)
36 { ...
37 return 0; }
38 |
39 if (...)
40 { ...
41 return <+...e...+>; }
42 |
43 *if@p2 (...)
44 { ... when != clk_put(e)
45 when forall
46 return@p3 ...; }
47 )
48 ... when any
49 clk_put(e);
50
51 @script:python depends on org@
52 p1 << clk.p1;
53 p2 << clk.p2;
54 p3 << clk.p3;
55 @@
56
57 cocci.print_main("clk_get",p1)
58 cocci.print_secs("if",p2)
59 cocci.print_secs("needed clk_put",p3)
60
61 @script:python depends on report@
62 p1 << clk.p1;
63 p2 << clk.p2;
64 p3 << clk.p3;
65 @@
66
67 msg = "ERROR: missing clk_put; clk_get on line %s and execution via conditional on line %s" % (p1[0].line,p2[0].line)
68 coccilib.report.print_report(p3[0],msg)
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