| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1 | /// Check for constants that are added but are used elsewhere as bitmasks |
| 2 | /// The results should be checked manually to ensure that the nonzero |
| 3 | /// bits in the two constants are actually disjoint. |
| 4 | /// |
| 5 | // Confidence: Moderate |
| 6 | // Copyright: (C) 2013 Julia Lawall, INRIA/LIP6. GPLv2. |
| 7 | // Copyright: (C) 2013 Gilles Muller, INRIA/LIP6. GPLv2. |
| 8 | // URL: http://coccinelle.lip6.fr/ |
| 9 | // Comments: |
| 10 | // Options: --no-includes --include-headers |
| 11 | |
| 12 | virtual org |
| 13 | virtual report |
| 14 | virtual context |
| 15 | |
| 16 | @r@ |
| 17 | constant c,c1; |
| 18 | identifier i,i1; |
| 19 | position p; |
| 20 | @@ |
| 21 | |
| 22 | ( |
| 23 | c1 + c - 1 |
| 24 | | |
| 25 | c1@i1 +@p c@i |
| 26 | ) |
| 27 | |
| 28 | @s@ |
| 29 | constant r.c, r.c1; |
| 30 | identifier i; |
| 31 | expression e; |
| 32 | @@ |
| 33 | |
| 34 | ( |
| 35 | e | c@i |
| 36 | | |
| 37 | e & c@i |
| 38 | | |
| 39 | e |= c@i |
| 40 | | |
| 41 | e &= c@i |
| 42 | | |
| 43 | e | c1@i |
| 44 | | |
| 45 | e & c1@i |
| 46 | | |
| 47 | e |= c1@i |
| 48 | | |
| 49 | e &= c1@i |
| 50 | ) |
| 51 | |
| 52 | @depends on s@ |
| 53 | position r.p; |
| 54 | constant c1,c2; |
| 55 | @@ |
| 56 | |
| 57 | * c1 +@p c2 |
| 58 | |
| 59 | @script:python depends on s && org@ |
| 60 | p << r.p; |
| 61 | @@ |
| 62 | |
| 63 | cocci.print_main("sum of probable bitmasks, consider |",p) |
| 64 | |
| 65 | @script:python depends on s && report@ |
| 66 | p << r.p; |
| 67 | @@ |
| 68 | |
| 69 | msg = "WARNING: sum of probable bitmasks, consider |" |
| 70 | coccilib.report.print_report(p[0],msg) |