| Julia Lawall | cd0207a | 2012-01-27 21:41:27 +0100 | [diff] [blame] | 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) |