threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
93 lines
1.5 KiB
Plaintext
93 lines
1.5 KiB
Plaintext
/// Find double locks. False positives may occur when some paths cannot
|
|
/// occur at execution, due to the values of variables, and when there is
|
|
/// an intervening 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
|
|
|
|
@locked@
|
|
position p1;
|
|
expression E1;
|
|
position p;
|
|
@@
|
|
|
|
(
|
|
mutex_lock@p1
|
|
|
|
|
mutex_trylock@p1
|
|
|
|
|
spin_lock@p1
|
|
|
|
|
spin_trylock@p1
|
|
|
|
|
read_lock@p1
|
|
|
|
|
read_trylock@p1
|
|
|
|
|
write_lock@p1
|
|
|
|
|
write_trylock@p1
|
|
) (E1@p,...);
|
|
|
|
@balanced@
|
|
position p1 != locked.p1;
|
|
position locked.p;
|
|
identifier lock,unlock;
|
|
expression x <= locked.E1;
|
|
expression E,locked.E1;
|
|
expression E2;
|
|
@@
|
|
|
|
if (E) {
|
|
<+... when != E1
|
|
lock(E1@p,...)
|
|
...+>
|
|
}
|
|
... when != E1
|
|
when != \(x = E2\|&x\)
|
|
when forall
|
|
if (E) {
|
|
<+... when != E1
|
|
unlock@p1(E1,...)
|
|
...+>
|
|
}
|
|
|
|
@r depends on !balanced exists@
|
|
expression x <= locked.E1;
|
|
expression locked.E1;
|
|
expression E2;
|
|
identifier lock;
|
|
position locked.p,p1,p2;
|
|
@@
|
|
|
|
lock@p1 (E1@p,...);
|
|
... when != E1
|
|
when != \(x = E2\|&x\)
|
|
lock@p2 (E1,...);
|
|
|
|
@script:python depends on org@
|
|
p1 << r.p1;
|
|
p2 << r.p2;
|
|
lock << r.lock;
|
|
@@
|
|
|
|
cocci.print_main(lock,p1)
|
|
cocci.print_secs("second lock",p2)
|
|
|
|
@script:python depends on report@
|
|
p1 << r.p1;
|
|
p2 << r.p2;
|
|
lock << r.lock;
|
|
@@
|
|
|
|
msg = "second lock on line %s" % (p2[0].line)
|
|
coccilib.report.print_report(p1[0],msg)
|