Messages in this thread | | | From | "Reshetova, Elena" <> | Subject | RE: [PATCH] Coccinelle: add atomic_as_refcounter script | Date | Tue, 15 Aug 2017 12:19:44 +0000 |
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> On Mon, 14 Aug 2017, Elena Reshetova wrote: > > > atomic_as_refcounter.cocci script allows detecting > > cases when refcount_t type and API should be used > > instead of atomic_t. > > > > Signed-off-by: Elena Reshetova <elena.reshetova@intel.com> > > --- > > scripts/coccinelle/api/atomic_as_refcounter.cocci | 148 > ++++++++++++++++++++++ > > 1 file changed, 148 insertions(+) > > create mode 100644 scripts/coccinelle/api/atomic_as_refcounter.cocci > > > > diff --git a/scripts/coccinelle/api/atomic_as_refcounter.cocci > b/scripts/coccinelle/api/atomic_as_refcounter.cocci > > new file mode 100644 > > index 0000000..996d72b > > --- /dev/null > > +++ b/scripts/coccinelle/api/atomic_as_refcounter.cocci > > @@ -0,0 +1,148 @@ > > +// Check if refcount_t type and API should be used > > +// instead of atomic_t type when dealing with refcounters > > +// > > +// Copyright (c) 2016-2017, Elena Reshetova, Intel Corporation > > +// > > +// Confidence: Moderate > > +// URL: http://coccinelle.lip6.fr/ > > +// Options: --include-headers --very-quiet > > + > > +virtual report > > + > > +@r1 exists@ > > +identifier a, x, y; > > +position p1, p2; > > +identifier fname =~ ".*free.*"; > > +identifier fname2 =~ ".*destroy.*"; > > +identifier fname3 =~ ".*del.*"; > > +identifier fname4 =~ ".*queue_work.*"; > > +identifier fname5 =~ ".*schedule_work.*"; > > +identifier fname6 =~ ".*call_rcu.*"; > > + > > +@@ > > + > > +( > > + atomic_dec_and_test@p1(&(a)->x) > > +| > > + atomic_dec_and_lock@p1(&(a)->x, ...) > > +| > > + atomic_long_dec_and_lock@p1(&(a)->x, ...) > > +| > > + atomic_long_dec_and_test@p1(&(a)->x) > > +| > > + atomic64_dec_and_test@p1(&(a)->x) > > +| > > + local_dec_and_test@p1(&(a)->x) > > +) > > +... > > +( > > + fname@p2(a, ...); > > +| > > + fname2@p2(...); > > +| > > + fname3@p2(...); > > +| > > + fname4@p2(...); > > +| > > + fname5@p2(...); > > +| > > + fname6@p2(...); > > +) > > + > > + > > +@script:python depends on report@ > > +p1 << r1.p1; > > +p2 << r1.p2; > > +@@ > > +msg = "atomic_dec_and_test variation before object free at line %s." > > +coccilib.report.print_report(p1[0], msg % (p2[0].line)) > > + > > +@r4 exists@ > > +identifier a, x, y; > > +position p1, p2; > > +identifier fname =~ ".*free.*"; > > +identifier fname2 =~ ".*destroy.*"; > > +identifier fname3 =~ ".*del.*"; > > +identifier fname4 =~ ".*queue_work.*"; > > +identifier fname5 =~ ".*schedule_work.*"; > > +identifier fname6 =~ ".*call_rcu.*"; > > + > > +@@ > > + > > +( > > + atomic_dec_and_test@p1(&(a)->x) > > +| > > + atomic_dec_and_lock@p1(&(a)->x, ...) > > +| > > + atomic_long_dec_and_lock@p1(&(a)->x, ...) > > +| > > + atomic_long_dec_and_test@p1(&(a)->x) > > +| > > + atomic64_dec_and_test@p1(&(a)->x) > > +| > > + local_dec_and_test@p1(&(a)->x) > > +) > > +... > > +y=a > > +... > > +( > > + fname@p2(y, ...); > > +| > > + fname2@p2(...); > > From here to the end of the rule there is no a or y. So they would match > the same thing as in the previous rule. so you could get rid of all of > these cases, and just leave fname@p2(y, ...);
True, stupid of me :( Will fix.
Best Regards, Elena.
> > julia > > > +| > > + fname3@p2(...); > > +| > > + fname4@p2(...); > > +| > > + fname5@p2(...); > > +| > > + fname6@p2(...); > > +) > > + > > + > > +@script:python depends on report@ > > +p1 << r4.p1; > > +p2 << r4.p2; > > +@@ > > +msg = "atomic_dec_and_test variation before object free at line %s." > > +coccilib.report.print_report(p1[0], msg % (p2[0].line)) > > + > > +@r2 exists@ > > +identifier a, x; > > +position p1; > > +@@ > > + > > +( > > +atomic_add_unless(&(a)->x,-1,1)@p1 > > +| > > +atomic_long_add_unless(&(a)->x,-1,1)@p1 > > +| > > +atomic64_add_unless(&(a)->x,-1,1)@p1 > > +) > > + > > +@script:python depends on report@ > > +p1 << r2.p1; > > +@@ > > +msg = "atomic_add_unless" > > +coccilib.report.print_report(p1[0], msg) > > + > > +@r3 exists@ > > +identifier x; > > +position p1; > > +@@ > > + > > +( > > +x = atomic_add_return@p1(-1, ...); > > +| > > +x = atomic_long_add_return@p1(-1, ...); > > +| > > +x = atomic64_add_return@p1(-1, ...); > > +) > > + > > +@script:python depends on report@ > > +p1 << r3.p1; > > +@@ > > +msg = "x = atomic_add_return(-1, ...)" > > +coccilib.report.print_report(p1[0], msg) > > + > > + > > -- > > 2.7.4 > > > >
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