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93 lines
1.5 KiB
93 lines
1.5 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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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. |
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// Copyright: (C) 2010 Julia Lawall, DIKU. |
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// Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. |
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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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