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| author | Denis Efremov <efremov@linux.com> | 2021-03-05 13:09:56 +0300 |
|---|---|---|
| committer | Julia Lawall <Julia.Lawall@inria.fr> | 2021-05-01 21:23:56 +0200 |
| commit | 7845daa8bd72efa8bbc1de122edfce6e058bbe41 (patch) | |
| tree | 40a486e587c8ea2b8a5b774956992fa5f5e407e3 /scripts/coccinelle/misc | |
| parent | cb62732d3bf0cd4c136d5927b003f002ff658e1c (diff) | |
| download | lwn-7845daa8bd72efa8bbc1de122edfce6e058bbe41.tar.gz lwn-7845daa8bd72efa8bbc1de122edfce6e058bbe41.zip | |
coccinelle: misc: add swap script
Check for opencoded swap() implementation.
Signed-off-by: Denis Efremov <efremov@linux.com>
Signed-off-by: Julia Lawall <julia.lawall@inria.fr>
Diffstat (limited to 'scripts/coccinelle/misc')
| -rw-r--r-- | scripts/coccinelle/misc/swap.cocci | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/scripts/coccinelle/misc/swap.cocci b/scripts/coccinelle/misc/swap.cocci new file mode 100644 index 000000000000..c5e71b7ef7f5 --- /dev/null +++ b/scripts/coccinelle/misc/swap.cocci @@ -0,0 +1,122 @@ +// SPDX-License-Identifier: GPL-2.0-only +/// +/// Check for opencoded swap() implementation. +/// +// Confidence: High +// Copyright: (C) 2021 Denis Efremov ISPRAS +// Options: --no-includes --include-headers +// +// Keywords: swap +// + +virtual patch +virtual org +virtual report +virtual context + +@rvar depends on !patch@ +identifier tmp; +expression a, b; +type T; +position p; +@@ + +( +* T tmp; +| +* T tmp = 0; +| +* T *tmp = NULL; +) +... when != tmp +* tmp = a; +* a = b;@p +* b = tmp; +... when != tmp + +@r depends on !patch@ +identifier tmp; +expression a, b; +position p != rvar.p; +@@ + +* tmp = a; +* a = b;@p +* b = tmp; + +@rpvar depends on patch@ +identifier tmp; +expression a, b; +type T; +@@ + +( +- T tmp; +| +- T tmp = 0; +| +- T *tmp = NULL; +) +... when != tmp +- tmp = a; +- a = b; +- b = tmp ++ swap(a, b) + ; +... when != tmp + +@rp depends on patch@ +identifier tmp; +expression a, b; +@@ + +- tmp = a; +- a = b; +- b = tmp ++ swap(a, b) + ; + +@depends on patch && (rpvar || rp)@ +@@ + +( + for (...;...;...) +- { + swap(...); +- } +| + while (...) +- { + swap(...); +- } +| + if (...) +- { + swap(...); +- } +) + + +@script:python depends on report@ +p << r.p; +@@ + +coccilib.report.print_report(p[0], "WARNING opportunity for swap()") + +@script:python depends on org@ +p << r.p; +@@ + +coccilib.org.print_todo(p[0], "WARNING opportunity for swap()") + +@script:python depends on report@ +p << rvar.p; +@@ + +coccilib.report.print_report(p[0], "WARNING opportunity for swap()") + +@script:python depends on org@ +p << rvar.p; +@@ + +coccilib.org.print_todo(p[0], "WARNING opportunity for swap()") |