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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: http://coccinelle.lip6.fr/ // 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) |