96 lines
1.7 KiB
Plaintext
96 lines
1.7 KiB
Plaintext
/// Find missing unlocks. This semantic match considers the specific case
|
|
/// where the unlock is missing from an if branch, and there is a lock
|
|
/// before the if and an unlock after the if. False positives are due to
|
|
/// cases where the if branch represents a case where the function is
|
|
/// supposed to exit with the lock held, or where there is some preceding
|
|
/// function call that releases the lock.
|
|
///
|
|
// Confidence: Moderate
|
|
// 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 org
|
|
virtual report
|
|
|
|
@prelocked@
|
|
position p1,p;
|
|
expression E1;
|
|
@@
|
|
|
|
(
|
|
mutex_lock@p1
|
|
|
|
|
mutex_trylock@p1
|
|
|
|
|
spin_lock@p1
|
|
|
|
|
spin_trylock@p1
|
|
|
|
|
read_lock@p1
|
|
|
|
|
read_trylock@p1
|
|
|
|
|
write_lock@p1
|
|
|
|
|
write_trylock@p1
|
|
|
|
|
read_lock_irq@p1
|
|
|
|
|
write_lock_irq@p1
|
|
|
|
|
read_lock_irqsave@p1
|
|
|
|
|
write_lock_irqsave@p1
|
|
|
|
|
spin_lock_irq@p1
|
|
|
|
|
spin_lock_irqsave@p1
|
|
) (E1@p,...);
|
|
|
|
@looped@
|
|
position r;
|
|
@@
|
|
|
|
for(...;...;...) { <+... return@r ...; ...+> }
|
|
|
|
@err@
|
|
expression E1;
|
|
position prelocked.p;
|
|
position up != prelocked.p1;
|
|
position r!=looped.r;
|
|
identifier lock,unlock;
|
|
@@
|
|
|
|
lock(E1@p,...);
|
|
<+... when != E1
|
|
if (...) {
|
|
... when != E1
|
|
return@r ...;
|
|
}
|
|
...+>
|
|
unlock@up(E1,...);
|
|
|
|
@script:python depends on org@
|
|
p << prelocked.p1;
|
|
lock << err.lock;
|
|
unlock << err.unlock;
|
|
p2 << err.r;
|
|
@@
|
|
|
|
cocci.print_main(lock,p)
|
|
cocci.print_secs(unlock,p2)
|
|
|
|
@script:python depends on report@
|
|
p << prelocked.p1;
|
|
lock << err.lock;
|
|
unlock << err.unlock;
|
|
p2 << err.r;
|
|
@@
|
|
|
|
msg = "preceding lock on line %s" % (p[0].line)
|
|
coccilib.report.print_report(p2[0],msg)
|