| Julia Lawall | 1024717 | 2010-10-24 23:37:31 +0200 | [diff] [blame] | 1 | /// Find nested lock+irqsave functions that use the same flags variables |
| 2 | /// |
| 3 | // Confidence: High |
| 4 | // Copyright: (C) 2010 Nicolas Palix, DIKU. GPLv2. |
| 5 | // Copyright: (C) 2010 Julia Lawall, DIKU. GPLv2. |
| 6 | // Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. GPLv2. |
| 7 | // URL: http://coccinelle.lip6.fr/ |
| 8 | // Comments: |
| 9 | // Options: -no_includes -include_headers |
| 10 | |
| 11 | virtual context |
| 12 | virtual org |
| 13 | virtual report |
| 14 | |
| 15 | @r@ |
| 16 | expression lock1,lock2,flags; |
| 17 | position p1,p2; |
| 18 | @@ |
| 19 | |
| 20 | ( |
| 21 | spin_lock_irqsave@p1(lock1,flags) |
| 22 | | |
| 23 | read_lock_irqsave@p1(lock1,flags) |
| 24 | | |
| 25 | write_lock_irqsave@p1(lock1,flags) |
| 26 | ) |
| 27 | ... when != flags |
| 28 | ( |
| 29 | spin_lock_irqsave(lock1,flags) |
| 30 | | |
| 31 | read_lock_irqsave(lock1,flags) |
| 32 | | |
| 33 | write_lock_irqsave(lock1,flags) |
| 34 | | |
| 35 | spin_lock_irqsave@p2(lock2,flags) |
| 36 | | |
| 37 | read_lock_irqsave@p2(lock2,flags) |
| 38 | | |
| 39 | write_lock_irqsave@p2(lock2,flags) |
| 40 | ) |
| 41 | |
| 42 | @d@ |
| 43 | expression f <= r.flags; |
| 44 | expression lock1,lock2,flags; |
| 45 | position 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@ |
| 67 | p1 << r.p1; |
| 68 | p2 << r.p2; |
| 69 | @@ |
| 70 | |
| 71 | cocci.print_main("original lock",p1) |
| 72 | cocci.print_secs("nested lock+irqsave that reuses flags",p2) |
| 73 | |
| 74 | @script:python depends on d && report@ |
| 75 | p1 << r.p1; |
| 76 | p2 << r.p2; |
| 77 | @@ |
| 78 | |
| 79 | msg="ERROR: nested lock+irqsave that reuses flags from %s." % (p1[0].line) |
| 80 | coccilib.report.print_report(p2[0], msg) |