| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 2 | /// Correct the size argument to alloc functions |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 3 | /// |
| 4 | //# This makes an effort to find cases where the argument to sizeof is wrong |
| 5 | //# in memory allocation functions by checking the type of the allocated memory |
| 6 | //# when it is a double pointer and ensuring the sizeof argument takes a pointer |
| 7 | //# to the the memory being allocated. There are false positives in cases the |
| 8 | //# sizeof argument is not used in constructing the return value. The result |
| 9 | //# may need some reformatting. |
| 10 | // |
| 11 | // Confidence: Moderate |
| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 12 | // Copyright: (C) 2014 Himangi Saraogi. |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 13 | // Comments: |
| 14 | // Options: |
| 15 | |
| 16 | virtual patch |
| 17 | virtual context |
| 18 | virtual org |
| 19 | virtual report |
| 20 | |
| 21 | //---------------------------------------------------------- |
| 22 | // For context mode |
| 23 | //---------------------------------------------------------- |
| 24 | |
| 25 | @depends on context disable sizeof_type_expr@ |
| 26 | type T; |
| 27 | T **x; |
| 28 | @@ |
| 29 | |
| 30 | x = |
| 31 | <+...sizeof( |
| 32 | * T |
| 33 | )...+> |
| 34 | |
| 35 | //---------------------------------------------------------- |
| 36 | // For patch mode |
| 37 | //---------------------------------------------------------- |
| 38 | |
| 39 | @depends on patch disable sizeof_type_expr@ |
| 40 | type T; |
| 41 | T **x; |
| 42 | @@ |
| 43 | |
| 44 | x = |
| 45 | <+...sizeof( |
| 46 | - T |
| 47 | + *x |
| 48 | )...+> |
| 49 | |
| 50 | //---------------------------------------------------------- |
| 51 | // For org and report mode |
| 52 | //---------------------------------------------------------- |
| 53 | |
| 54 | @r depends on (org || report) disable sizeof_type_expr@ |
| 55 | type T; |
| 56 | T **x; |
| 57 | position p; |
| 58 | @@ |
| 59 | |
| 60 | x = |
| 61 | <+...sizeof( |
| 62 | T@p |
| 63 | )...+> |
| 64 | |
| 65 | @script:python depends on org@ |
| 66 | p << r.p; |
| 67 | @@ |
| 68 | |
| 69 | coccilib.org.print_todo(p[0], "WARNING sizeof argument should be pointer type, not structure type") |
| 70 | |
| 71 | @script:python depends on report@ |
| 72 | p << r.p; |
| 73 | @@ |
| 74 | |
| 75 | msg="WARNING: Use correct pointer type argument for sizeof" |
| 76 | coccilib.report.print_report(p[0], msg) |
| 77 | |