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| author | Julia Lawall <julia@diku.dk> | 2010-10-24 23:37:31 +0200 |
|---|---|---|
| committer | Michal Marek <mmarek@suse.cz> | 2010-10-28 00:32:22 +0200 |
| commit | 10247179a7af4f000468e12ae73f3cf657b66235 (patch) | |
| tree | 2055e9de62cd8f3621cf7f5745aabb657a763dc7 /scripts/coccinelle | |
| parent | 24a54f7974a616385b96cd939e004592e2cea484 (diff) | |
| download | lwn-10247179a7af4f000468e12ae73f3cf657b66235.tar.gz lwn-10247179a7af4f000468e12ae73f3cf657b66235.zip | |
Coccinelle: Find nested lock+irqsave functions that use the same flags variables.
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Nicolas Palix <npalix.work@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Diffstat (limited to 'scripts/coccinelle')
| -rw-r--r-- | scripts/coccinelle/locks/flags.cocci | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/scripts/coccinelle/locks/flags.cocci b/scripts/coccinelle/locks/flags.cocci new file mode 100644 index 000000000000..b4344d838097 --- /dev/null +++ b/scripts/coccinelle/locks/flags.cocci @@ -0,0 +1,80 @@ +/// Find nested lock+irqsave functions that use the same flags variables +/// +// Confidence: High +// Copyright: (C) 2010 Nicolas Palix, DIKU. GPLv2. +// Copyright: (C) 2010 Julia Lawall, DIKU. GPLv2. +// Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. GPLv2. +// URL: http://coccinelle.lip6.fr/ +// Comments: +// Options: -no_includes -include_headers + +virtual context +virtual org +virtual report + +@r@ +expression lock1,lock2,flags; +position p1,p2; +@@ + +( +spin_lock_irqsave@p1(lock1,flags) +| +read_lock_irqsave@p1(lock1,flags) +| +write_lock_irqsave@p1(lock1,flags) +) +... when != flags +( +spin_lock_irqsave(lock1,flags) +| +read_lock_irqsave(lock1,flags) +| +write_lock_irqsave(lock1,flags) +| +spin_lock_irqsave@p2(lock2,flags) +| +read_lock_irqsave@p2(lock2,flags) +| +write_lock_irqsave@p2(lock2,flags) +) + +@d@ +expression f <= r.flags; +expression lock1,lock2,flags; +position r.p1, r.p2; +@@ + +( +*spin_lock_irqsave@p1(lock1,flags) +| +*read_lock_irqsave@p1(lock1,flags) +| +*write_lock_irqsave@p1(lock1,flags) +) +... when != f +( +*spin_lock_irqsave@p2(lock2,flags) +| +*read_lock_irqsave@p2(lock2,flags) +| +*write_lock_irqsave@p2(lock2,flags) +) + +// ---------------------------------------------------------------------- + +@script:python depends on d && org@ +p1 << r.p1; +p2 << r.p2; +@@ + +cocci.print_main("original lock",p1) +cocci.print_secs("nested lock+irqsave that reuses flags",p2) + +@script:python depends on d && report@ +p1 << r.p1; +p2 << r.p2; +@@ + +msg="ERROR: nested lock+irqsave that reuses flags from %s." % (p1[0].line) +coccilib.report.print_report(p2[0], msg) |