1 // SPDX-License-Identifier: GPL-2.0-only
2 /// Find nested lock+irqsave functions that use the same flags variables
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 context
13 virtual org
14 virtual report
15
16 @r exists@
17 expression lock1,lock2,flags;
18 position p1,p2;
19 @@
20
21 (
22 spin_lock_irqsave@p1(lock1,flags)
23 |
24 read_lock_irqsave@p1(lock1,flags)
25 |
26 write_lock_irqsave@p1(lock1,flags)
27 )
28 ... when != flags
29 (
30 spin_lock_irqsave(lock1,flags)
31 |
32 read_lock_irqsave(lock1,flags)
33 |
34 write_lock_irqsave(lock1,flags)
35 |
36 spin_lock_irqsave@p2(lock2,flags)
37 |
38 read_lock_irqsave@p2(lock2,flags)
39 |
40 write_lock_irqsave@p2(lock2,flags)
41 )
42
43 @d exists@
44 expression f <= r.flags;
45 expression lock1,lock2,flags;
46 position r.p1, r.p2;
47 @@
48
49 (
50 *spin_lock_irqsave@p1(lock1,flags)
51 |
52 *read_lock_irqsave@p1(lock1,flags)
53 |
54 *write_lock_irqsave@p1(lock1,flags)
55 )
56 ... when != f
57 (
58 *spin_lock_irqsave@p2(lock2,flags)
59 |
60 *read_lock_irqsave@p2(lock2,flags)
61 |
62 *write_lock_irqsave@p2(lock2,flags)
63 )
64
65 // ----------------------------------------------------------------------
66
67 @script:python depends on d && org@
68 p1 << r.p1;
69 p2 << r.p2;
70 @@
71
72 cocci.print_main("original lock",p1)
73 cocci.print_secs("nested lock+irqsave that reuses flags",p2)
74
75 @script:python depends on d && report@
76 p1 << r.p1;
77 p2 << r.p2;
78 @@
79
80 msg="ERROR: nested lock+irqsave that reuses flags from line %s." % (p1[0].line)
81 coccilib.report.print_report(p2[0], msg)
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