summaryrefslogtreecommitdiffstats
path: root/scripts/coccinelle/api/atomic_as_refcounter.cocci
blob: e63d52408b86fe38d24c07e0402776c0086b0b7e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
// SPDX-License-Identifier: GPL-2.0-only
// Check if refcount_t type and API should be used
// instead of atomic_t type when dealing with refcounters
//
// Copyright (c) 2016-2017, Elena Reshetova, Intel Corporation
//
// Confidence: Moderate
// URL: https://coccinelle.gitlabpages.inria.fr/website
// Options: --include-headers --very-quiet

virtual report

@r1 exists@
identifier a, x;
position p1, p2;
identifier fname =~ ".*free.*";
identifier fname2 =~ ".*destroy.*";
identifier fname3 =~ ".*del.*";
identifier fname4 =~ ".*queue_work.*";
identifier fname5 =~ ".*schedule_work.*";
identifier fname6 =~ ".*call_rcu.*";

@@

(
 atomic_dec_and_test@p1(&(a)->x)
|
 atomic_dec_and_lock@p1(&(a)->x, ...)
|
 atomic_long_dec_and_lock@p1(&(a)->x, ...)
|
 atomic_long_dec_and_test@p1(&(a)->x)
|
 atomic64_dec_and_test@p1(&(a)->x)
|
 local_dec_and_test@p1(&(a)->x)
)
...
(
 fname@p2(a, ...);
|
 fname2@p2(...);
|
 fname3@p2(...);
|
 fname4@p2(...);
|
 fname5@p2(...);
|
 fname6@p2(...);
)


@script:python depends on report@
p1 << r1.p1;
p2 << r1.p2;
@@
msg = "atomic_dec_and_test variation before object free at line %s."
coccilib.report.print_report(p1[0], msg % (p2[0].line))

@r4 exists@
identifier a, x, y;
position p1, p2;
identifier fname =~ ".*free.*";

@@

(
 atomic_dec_and_test@p1(&(a)->x)
|
 atomic_dec_and_lock@p1(&(a)->x, ...)
|
 atomic_long_dec_and_lock@p1(&(a)->x, ...)
|
 atomic_long_dec_and_test@p1(&(a)->x)
|
 atomic64_dec_and_test@p1(&(a)->x)
|
 local_dec_and_test@p1(&(a)->x)
)
...
y=a
...
fname@p2(y, ...);


@script:python depends on report@
p1 << r4.p1;
p2 << r4.p2;
@@
msg = "atomic_dec_and_test variation before object free at line %s."
coccilib.report.print_report(p1[0], msg % (p2[0].line))

@r2 exists@
identifier a, x;
position p1;
@@

(
atomic_add_unless(&(a)->x,-1,1)@p1
|
atomic_long_add_unless(&(a)->x,-1,1)@p1
|
atomic64_add_unless(&(a)->x,-1,1)@p1
)

@script:python depends on report@
p1 << r2.p1;
@@
msg = "atomic_add_unless"
coccilib.report.print_report(p1[0], msg)

@r3 exists@
identifier x;
position p1;
@@

(
x = atomic_add_return@p1(-1, ...);
|
x = atomic_long_add_return@p1(-1, ...);
|
x = atomic64_add_return@p1(-1, ...);
)

@script:python depends on report@
p1 << r3.p1;
@@
msg = "x = atomic_add_return(-1, ...)"
coccilib.report.print_report(p1[0], msg)