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Diffstat (limited to '')
| -rw-r--r-- | scripts/coccinelle/locks/flags.cocci | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/scripts/coccinelle/locks/flags.cocci b/scripts/coccinelle/locks/flags.cocci new file mode 100644 index 000000000..44acf20a9 --- /dev/null +++ b/scripts/coccinelle/locks/flags.cocci @@ -0,0 +1,81 @@ +// SPDX-License-Identifier: GPL-2.0-only +/// Find nested lock+irqsave functions that use the same flags variables +/// +// Confidence: High +// Copyright: (C) 2010-2012 Nicolas Palix. +// Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6. +// Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6. +// URL: https://coccinelle.gitlabpages.inria.fr/website +// 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) |