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authorJulia Lawall <Julia.Lawall@lip6.fr>2012-01-27 21:41:26 +0100
committerMichal Marek <mmarek@suse.cz>2012-02-25 00:07:11 +0100
commit53302c1dfa8a911b88e68634ed56fcf577037fac (patch)
treeac30cc998aaca829e180efd699da954d1f03296f
parentkbuild: Fix out-of-tree build for 'make deb-pkg' (diff)
downloadlinux-53302c1dfa8a911b88e68634ed56fcf577037fac.tar.xz
linux-53302c1dfa8a911b88e68634ed56fcf577037fac.zip
coccinelle: semantic patch for missing clk_put
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Michal Marek <mmarek@suse.cz>
-rw-r--r--scripts/coccinelle/free/clk_put.cocci67
1 files changed, 67 insertions, 0 deletions
diff --git a/scripts/coccinelle/free/clk_put.cocci b/scripts/coccinelle/free/clk_put.cocci
new file mode 100644
index 000000000000..46747adfd20a
--- /dev/null
+++ b/scripts/coccinelle/free/clk_put.cocci
@@ -0,0 +1,67 @@
+/// Find missing clk_puts.
+///
+//# This only signals a missing clk_put when there is a clk_put later
+//# in the same function.
+//# False positives can be due to loops.
+//
+// Confidence: Moderate
+// Copyright: (C) 2012 Julia Lawall, INRIA/LIP6. GPLv2.
+// Copyright: (C) 2012 Gilles Muller, INRIA/LiP6. GPLv2.
+// URL: http://coccinelle.lip6.fr/
+// Comments:
+// Options:
+
+virtual context
+virtual org
+virtual report
+
+@clk@
+expression e;
+statement S,S1;
+int ret;
+position p1,p2,p3;
+@@
+
+e = clk_get@p1(...)
+... when != clk_put(e)
+if (<+...e...+>) S
+... when any
+ when != clk_put(e)
+ when != if (...) { ... clk_put(e); ... }
+(
+ if (ret == 0) S1
+|
+if (...)
+ { ...
+ return 0; }
+|
+if (...)
+ { ...
+ return <+...e...+>; }
+|
+*if@p2 (...)
+ { ... when != clk_put(e)
+ when forall
+ return@p3 ...; }
+)
+... when any
+clk_put(e);
+
+@script:python depends on org@
+p1 << clk.p1;
+p2 << clk.p2;
+p3 << clk.p3;
+@@
+
+cocci.print_main("clk_get",p1)
+cocci.print_secs("if",p2)
+cocci.print_secs("needed clk_put",p3)
+
+@script:python depends on report@
+p1 << clk.p1;
+p2 << clk.p2;
+p3 << clk.p3;
+@@
+
+msg = "ERROR: missing clk_put; clk_get on line %s and execution via conditional on line %s" % (p1[0].line,p2[0].line)
+coccilib.report.print_report(p3[0],msg)