93 lines
1.5 KiB
Text
93 lines
1.5 KiB
Text
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/// Find double locks. False positives may occur when some paths cannot
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/// occur at execution, due to the values of variables, and when there is
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/// an intervening function call that releases the lock.
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///
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// Confidence: Moderate
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// Copyright: (C) 2010 Nicolas Palix, DIKU. GPLv2.
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// Copyright: (C) 2010 Julia Lawall, DIKU. GPLv2.
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// Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. GPLv2.
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// URL: http://coccinelle.lip6.fr/
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// Comments:
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// Options: --no-includes --include-headers
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virtual org
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virtual report
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@locked@
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position p1;
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expression E1;
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position p;
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@@
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(
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mutex_lock@p1
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mutex_trylock@p1
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spin_lock@p1
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spin_trylock@p1
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read_lock@p1
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read_trylock@p1
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write_lock@p1
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write_trylock@p1
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) (E1@p,...);
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@balanced@
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position p1 != locked.p1;
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position locked.p;
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identifier lock,unlock;
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expression x <= locked.E1;
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expression E,locked.E1;
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expression E2;
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@@
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if (E) {
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<+... when != E1
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lock(E1@p,...)
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...+>
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}
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... when != E1
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when != \(x = E2\|&x\)
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when forall
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if (E) {
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<+... when != E1
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unlock@p1(E1,...)
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...+>
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}
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@r depends on !balanced exists@
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expression x <= locked.E1;
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expression locked.E1;
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expression E2;
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identifier lock;
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position locked.p,p1,p2;
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@@
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lock@p1 (E1@p,...);
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... when != E1
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when != \(x = E2\|&x\)
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lock@p2 (E1,...);
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@script:python depends on org@
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p1 << r.p1;
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p2 << r.p2;
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lock << r.lock;
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@@
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cocci.print_main(lock,p1)
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cocci.print_secs("second lock",p2)
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@script:python depends on report@
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p1 << r.p1;
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p2 << r.p2;
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lock << r.lock;
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@@
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msg = "second lock on line %s" % (p2[0].line)
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coccilib.report.print_report(p1[0],msg)
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