linux/scripts/coccinelle/locks/flags.cocci
Julia Lawall 29a36d4dec scripts/coccinelle: improve the coverage of some semantic patches
This patch ensures that all semantic patches in the scripts/coccinelle
directory provide the report option.  Report messages that include line
numbers now have the line number preceded by "line" for easier subsequent
processing.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Michal Marek <mmarek@suse.cz>
2012-01-15 00:05:46 +01:00

80 lines
1.5 KiB
Text

/// Find nested lock+irqsave functions that use the same flags variables
///
// Confidence: High
// Copyright: (C) 2010-2012 Nicolas Palix. GPLv2.
// Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6. GPLv2.
// Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6. GPLv2.
// URL: http://coccinelle.lip6.fr/
// Comments:
// Options: -no_includes -include_headers
virtual context
virtual org
virtual report
@r exists@
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 exists@
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 line %s." % (p1[0].line)
coccilib.report.print_report(p2[0], msg)