1/// Find nested lock+irqsave functions that use the same flags variables
2///
3// Confidence: High
4// Copyright: (C) 2010-2012 Nicolas Palix.  GPLv2.
5// Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6.  GPLv2.
6// Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6.  GPLv2.
7// URL: http://coccinelle.lip6.fr/
8// Comments:
9// Options: --no-includes --include-headers
10
11virtual context
12virtual org
13virtual report
14
15@r exists@
16expression lock1,lock2,flags;
17position p1,p2;
18@@
19
20(
21spin_lock_irqsave@p1(lock1,flags)
22|
23read_lock_irqsave@p1(lock1,flags)
24|
25write_lock_irqsave@p1(lock1,flags)
26)
27... when != flags
28(
29spin_lock_irqsave(lock1,flags)
30|
31read_lock_irqsave(lock1,flags)
32|
33write_lock_irqsave(lock1,flags)
34|
35spin_lock_irqsave@p2(lock2,flags)
36|
37read_lock_irqsave@p2(lock2,flags)
38|
39write_lock_irqsave@p2(lock2,flags)
40)
41
42@d exists@
43expression f <= r.flags;
44expression lock1,lock2,flags;
45position r.p1, r.p2;
46@@
47
48(
49*spin_lock_irqsave@p1(lock1,flags)
50|
51*read_lock_irqsave@p1(lock1,flags)
52|
53*write_lock_irqsave@p1(lock1,flags)
54)
55... when != f
56(
57*spin_lock_irqsave@p2(lock2,flags)
58|
59*read_lock_irqsave@p2(lock2,flags)
60|
61*write_lock_irqsave@p2(lock2,flags)
62)
63
64// ----------------------------------------------------------------------
65
66@script:python depends on d && org@
67p1 << r.p1;
68p2 << r.p2;
69@@
70
71cocci.print_main("original lock",p1)
72cocci.print_secs("nested lock+irqsave that reuses flags",p2)
73
74@script:python depends on d && report@
75p1 << r.p1;
76p2 << r.p2;
77@@
78
79msg="ERROR: nested lock+irqsave that reuses flags from line %s." % (p1[0].line)
80coccilib.report.print_report(p2[0], msg)
81