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Commit | Line | Data |
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7f904d7e | 1 | // SPDX-License-Identifier: GPL-2.0-only |
10247179 JL |
2 | /// Find nested lock+irqsave functions that use the same flags variables |
3 | /// | |
4 | // Confidence: High | |
7f904d7e TG |
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. | |
f01701ce | 8 | // URL: https://coccinelle.gitlabpages.inria.fr/website |
10247179 | 9 | // Comments: |
93f14468 | 10 | // Options: --no-includes --include-headers |
10247179 JL |
11 | |
12 | virtual context | |
13 | virtual org | |
14 | virtual report | |
15 | ||
29a36d4d | 16 | @r exists@ |
10247179 JL |
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 | ||
29a36d4d | 43 | @d exists@ |
10247179 JL |
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 | ||
29a36d4d | 80 | msg="ERROR: nested lock+irqsave that reuses flags from line %s." % (p1[0].line) |
10247179 | 81 | coccilib.report.print_report(p2[0], msg) |