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| 1 | +/// Find missing iounmaps. | |
| 2 | +/// | |
| 3 | +//# This only signals a missing iounmap when there is an iounmap later | |
| 4 | +//# in the same function. | |
| 5 | +//# False positives can be due to loops. | |
| 6 | +// | |
| 7 | +// Confidence: Moderate | |
| 8 | +// Copyright: (C) 2012 Julia Lawall, INRIA/LIP6. GPLv2. | |
| 9 | +// Copyright: (C) 2012 Gilles Muller, INRIA/LiP6. GPLv2. | |
| 10 | +// URL: http://coccinelle.lip6.fr/ | |
| 11 | +// Comments: | |
| 12 | +// Options: | |
| 13 | + | |
| 14 | +virtual context | |
| 15 | +virtual org | |
| 16 | +virtual report | |
| 17 | + | |
| 18 | +@iom@ | |
| 19 | +expression e; | |
| 20 | +statement S,S1; | |
| 21 | +int ret; | |
| 22 | +position p1,p2,p3; | |
| 23 | +@@ | |
| 24 | + | |
| 25 | +e = \(ioremap@p1\|ioremap_nocache@p1\)(...) | |
| 26 | +... when != iounmap(e) | |
| 27 | +if (<+...e...+>) S | |
| 28 | +... when any | |
| 29 | + when != iounmap(e) | |
| 30 | + when != if (...) { ... iounmap(e); ... } | |
| 31 | +( | |
| 32 | + if (ret == 0) S1 | |
| 33 | +| | |
| 34 | +if (...) | |
| 35 | + { ... | |
| 36 | + return 0; } | |
| 37 | +| | |
| 38 | +if (...) | |
| 39 | + { ... | |
| 40 | + return <+...e...+>; } | |
| 41 | +| | |
| 42 | +*if@p2 (...) | |
| 43 | + { ... when != iounmap(e) | |
| 44 | + when forall | |
| 45 | + return@p3 ...; } | |
| 46 | +) | |
| 47 | +... when any | |
| 48 | +iounmap(e); | |
| 49 | + | |
| 50 | +@script:python depends on org@ | |
| 51 | +p1 << iom.p1; | |
| 52 | +p2 << iom.p2; | |
| 53 | +p3 << iom.p3; | |
| 54 | +@@ | |
| 55 | + | |
| 56 | +cocci.print_main("ioremap",p1) | |
| 57 | +cocci.print_secs("if",p2) | |
| 58 | +cocci.print_secs("needed iounmap",p3) | |
| 59 | + | |
| 60 | +@script:python depends on report@ | |
| 61 | +p1 << iom.p1; | |
| 62 | +p2 << iom.p2; | |
| 63 | +p3 << iom.p3; | |
| 64 | +@@ | |
| 65 | + | |
| 66 | +msg = "ERROR: missing iounmap; ioremap on line %s and execution via conditional on line %s" % (p1[0].line,p2[0].line) | |
| 67 | +coccilib.report.print_report(p3[0],msg) | |