[PATCH v3 3/3] coccinelle: Add rules to find str_alloc_free() replacements

[Jiazi Li <jqqlijiazi@gmail.com>]

Add rules for finding places where str_alloc_free()/str_free_alloc
can be used.

Tested-by mingzhu.wang <mingzhu.wang@transsion.com>
Signed-off-by: Jiazi Li <jqqlijiazi@gmail.com>
---
 scripts/coccinelle/api/string_choices.cocci | 38 +++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/scripts/coccinelle/api/string_choices.cocci b/scripts/coccinelle/api/string_choices.cocci
index 7b2b76a42acc..516b30828380 100644
--- a/scripts/coccinelle/api/string_choices.cocci
+++ b/scripts/coccinelle/api/string_choices.cocci
@@ -7,6 +7,44 @@ virtual patch
 virtual context
 virtual report
 
+@str_alloc_free depends on patch disable neg_if_exp@
+expression E;
+@@
+-      ((E) ? "alloc" : "free")
++      str_alloc_free(E)
+
+@str_alloc_free_r depends on !patch disable neg_if_exp@
+expression E;
+position P;
+@@
+*      E@P ? "alloc" : "free"
+
+@script:python depends on report@
+p << str_alloc_free_r.P;
+e << str_alloc_free_r.E;
+@@
+
+coccilib.report.print_report(p[0], "opportunity for str_alloc_free(%s)" % e)
+
+@str_free_alloc depends on patch disable neg_if_exp@
+expression E;
+@@
+-      ((E) ? "free" : "alloc")
++      str_free_alloc(E)
+
+@str_free_alloc_r depends on !patch disable neg_if_exp@
+expression E;
+position P;
+@@
+*      E@P ? "free" : "alloc"
+
+@script:python depends on report@
+p << str_free_alloc_r.P;
+e << str_free_alloc_r.E;
+@@
+
+coccilib.report.print_report(p[0], "opportunity for str_free_alloc(%s)" % e)
+
 @str_enable_disable depends on patch@
 expression E;
 @@
-- 
2.49.0