| // SPDX-License-Identifier: GPL-2.0-only |
| /// list_for_each_entry uses its first argument to get from one element of |
| /// the list to the next, so it is usually not a good idea to reassign it. |
| /// The first rule finds such a reassignment and the second rule checks |
| /// that there is a path from the reassignment back to the top of the loop. |
| /// |
| // Confidence: High |
| // Copyright: (C) 2010 Nicolas Palix, DIKU. |
| // Copyright: (C) 2010 Julia Lawall, DIKU. |
| // Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. |
| // URL: http://coccinelle.lip6.fr/ |
| // Comments: |
| // Options: --no-includes --include-headers |
| |
| virtual context |
| virtual org |
| virtual report |
| |
| @r exists@ |
| iterator name list_for_each_entry; |
| expression x,E; |
| position p1,p2; |
| @@ |
| |
| list_for_each_entry@p1(x,...) { <... x =@p2 E ...> } |
| |
| @depends on context && !org && !report@ |
| expression x,E; |
| position r.p1,r.p2; |
| statement S; |
| @@ |
| |
| *x =@p2 E |
| ... |
| list_for_each_entry@p1(x,...) S |
| |
| // ------------------------------------------------------------------------ |
| |
| @back depends on (org || report) && !context exists@ |
| expression x,E; |
| position r.p1,r.p2; |
| statement S; |
| @@ |
| |
| x =@p2 E |
| ... |
| list_for_each_entry@p1(x,...) S |
| |
| @script:python depends on back && org@ |
| p1 << r.p1; |
| p2 << r.p2; |
| @@ |
| |
| cocci.print_main("iterator",p1) |
| cocci.print_secs("update",p2) |
| |
| @script:python depends on back && report@ |
| p1 << r.p1; |
| p2 << r.p2; |
| @@ |
| |
| msg = "iterator with update on line %s" % (p2[0].line) |
| coccilib.report.print_report(p1[0],msg) |
