mirror of
https://github.com/joel16/android_kernel_sony_msm8994.git
synced 2024-11-30 07:31:23 +00:00
Add scripts/coccinelle/deref_null.cocci
Add a Coccinelle file to identify the dereferences of NULL variables This semantic patch identifies when a variable is known to be NULL after a test, but it is still dereferenced later. Signed-off-by: Nicolas Palix <npalix@diku.dk> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Michal Marek <mmarek@suse.cz>
This commit is contained in:
Nicolas Palix
Michal Marek
parent
f853f8305b
commit
82c4340b0a
293
scripts/coccinelle/deref_null.cocci
Normal file
293
scripts/coccinelle/deref_null.cocci
Normal file
@ -0,0 +1,293 @@
|
||||
///
|
||||
/// A variable is dereference under a NULL test.
|
||||
/// Even though it is know to be NULL.
|
||||
///
|
||||
// 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: -I ... -all_includes can give more complete results
|
||||
// Options:
|
||||
|
||||
virtual context
|
||||
virtual patch
|
||||
virtual org
|
||||
virtual report
|
||||
|
||||
@initialize:python depends on !context && patch && !org && !report@
|
||||
|
||||
import sys
|
||||
print >> sys.stderr, "This semantic patch does not support the 'patch' mode."
|
||||
|
||||
@depends on patch@
|
||||
@@
|
||||
|
||||
this_rule_should_never_matches();
|
||||
|
||||
@ifm depends on !patch@
|
||||
expression *E;
|
||||
statement S1,S2;
|
||||
position p1;
|
||||
@@
|
||||
|
||||
if@p1 ((E == NULL && ...) || ...) S1 else S2
|
||||
|
||||
// The following two rules are separate, because both can match a single
|
||||
// expression in different ways
|
||||
@pr1 depends on !patch expression@
|
||||
expression *ifm.E;
|
||||
identifier f;
|
||||
position p1;
|
||||
@@
|
||||
|
||||
(E != NULL && ...) ? <+...E->f@p1...+> : ...
|
||||
|
||||
@pr2 depends on !patch expression@
|
||||
expression *ifm.E;
|
||||
identifier f;
|
||||
position p2;
|
||||
@@
|
||||
|
||||
(
|
||||
(E != NULL) && ... && <+...E->f@p2...+>
|
||||
|
|
||||
(E == NULL) || ... || <+...E->f@p2...+>
|
||||
|
|
||||
sizeof(<+...E->f@p2...+>)
|
||||
)
|
||||
|
||||
// For org and report modes
|
||||
|
||||
@r depends on !context && !patch && (org || report) exists@
|
||||
expression subE <= ifm.E;
|
||||
expression *ifm.E;
|
||||
expression E1,E2;
|
||||
identifier f;
|
||||
statement S1,S2,S3,S4;
|
||||
iterator iter;
|
||||
position p!={pr1.p1,pr2.p2};
|
||||
position ifm.p1;
|
||||
@@
|
||||
|
||||
if@p1 ((E == NULL && ...) || ...)
|
||||
{
|
||||
... when != if (...) S1 else S2
|
||||
(
|
||||
iter(subE,...) S4 // no use
|
||||
|
|
||||
list_remove_head(E2,subE,...)
|
||||
|
|
||||
subE = E1
|
||||
|
|
||||
for(subE = E1;...;...) S4
|
||||
|
|
||||
subE++
|
||||
|
|
||||
++subE
|
||||
|
|
||||
--subE
|
||||
|
|
||||
subE--
|
||||
|
|
||||
&subE
|
||||
|
|
||||
E->f@p // bad use
|
||||
)
|
||||
... when any
|
||||
return ...;
|
||||
}
|
||||
else S3
|
||||
|
||||
@script:python depends on !context && !patch && !org && report@
|
||||
p << r.p;
|
||||
p1 << ifm.p1;
|
||||
x << ifm.E;
|
||||
@@
|
||||
|
||||
msg="ERROR: %s is NULL but dereferenced." % (x)
|
||||
coccilib.report.print_report(p[0], msg)
|
||||
cocci.include_match(False)
|
||||
|
||||
@script:python depends on !context && !patch && org && !report@
|
||||
p << r.p;
|
||||
p1 << ifm.p1;
|
||||
x << ifm.E;
|
||||
@@
|
||||
|
||||
msg="ERROR: %s is NULL but dereferenced." % (x)
|
||||
msg_safe=msg.replace("[","@(").replace("]",")")
|
||||
cocci.print_main(msg_safe,p)
|
||||
cocci.include_match(False)
|
||||
|
||||
@s depends on !context && !patch && (org || report) exists@
|
||||
expression subE <= ifm.E;
|
||||
expression *ifm.E;
|
||||
expression E1,E2;
|
||||
identifier f;
|
||||
statement S1,S2,S3,S4;
|
||||
iterator iter;
|
||||
position p!={pr1.p1,pr2.p2};
|
||||
position ifm.p1;
|
||||
@@
|
||||
|
||||
if@p1 ((E == NULL && ...) || ...)
|
||||
{
|
||||
... when != if (...) S1 else S2
|
||||
(
|
||||
iter(subE,...) S4 // no use
|
||||
|
|
||||
list_remove_head(E2,subE,...)
|
||||
|
|
||||
subE = E1
|
||||
|
|
||||
for(subE = E1;...;...) S4
|
||||
|
|
||||
subE++
|
||||
|
|
||||
++subE
|
||||
|
|
||||
--subE
|
||||
|
|
||||
subE--
|
||||
|
|
||||
&subE
|
||||
|
|
||||
E->f@p // bad use
|
||||
)
|
||||
... when any
|
||||
}
|
||||
else S3
|
||||
|
||||
@script:python depends on !context && !patch && !org && report@
|
||||
p << s.p;
|
||||
p1 << ifm.p1;
|
||||
x << ifm.E;
|
||||
@@
|
||||
|
||||
msg="ERROR: %s is NULL but dereferenced." % (x)
|
||||
coccilib.report.print_report(p[0], msg)
|
||||
|
||||
@script:python depends on !context && !patch && org && !report@
|
||||
p << s.p;
|
||||
p1 << ifm.p1;
|
||||
x << ifm.E;
|
||||
@@
|
||||
|
||||
msg="ERROR: %s is NULL but dereferenced." % (x)
|
||||
msg_safe=msg.replace("[","@(").replace("]",")")
|
||||
cocci.print_main(msg_safe,p)
|
||||
|
||||
// For context mode
|
||||
|
||||
@depends on context && !patch && !org && !report exists@
|
||||
expression subE <= ifm.E;
|
||||
expression *ifm.E;
|
||||
expression E1,E2;
|
||||
identifier f;
|
||||
statement S1,S2,S3,S4;
|
||||
iterator iter;
|
||||
position p!={pr1.p1,pr2.p2};
|
||||
position ifm.p1;
|
||||
@@
|
||||
|
||||
if@p1 ((E == NULL && ...) || ...)
|
||||
{
|
||||
... when != if (...) S1 else S2
|
||||
(
|
||||
iter(subE,...) S4 // no use
|
||||
|
|
||||
list_remove_head(E2,subE,...)
|
||||
|
|
||||
subE = E1
|
||||
|
|
||||
for(subE = E1;...;...) S4
|
||||
|
|
||||
subE++
|
||||
|
|
||||
++subE
|
||||
|
|
||||
--subE
|
||||
|
|
||||
subE--
|
||||
|
|
||||
&subE
|
||||
|
|
||||
* E->f@p // bad use
|
||||
)
|
||||
... when any
|
||||
return ...;
|
||||
}
|
||||
else S3
|
||||
|
||||
// The following three rules are duplicates of ifm, pr1 and pr2 respectively.
|
||||
// It is need because the previous rule as already made a "change".
|
||||
|
||||
@ifm1 depends on !patch@
|
||||
expression *E;
|
||||
statement S1,S2;
|
||||
position p1;
|
||||
@@
|
||||
|
||||
if@p1 ((E == NULL && ...) || ...) S1 else S2
|
||||
|
||||
@pr11 depends on !patch expression@
|
||||
expression *ifm1.E;
|
||||
identifier f;
|
||||
position p1;
|
||||
@@
|
||||
|
||||
(E != NULL && ...) ? <+...E->f@p1...+> : ...
|
||||
|
||||
@pr12 depends on !patch expression@
|
||||
expression *ifm1.E;
|
||||
identifier f;
|
||||
position p2;
|
||||
@@
|
||||
|
||||
(
|
||||
(E != NULL) && ... && <+...E->f@p2...+>
|
||||
|
|
||||
(E == NULL) || ... || <+...E->f@p2...+>
|
||||
|
|
||||
sizeof(<+...E->f@p2...+>)
|
||||
)
|
||||
|
||||
@depends on context && !patch && !org && !report exists@
|
||||
expression subE <= ifm1.E;
|
||||
expression *ifm1.E;
|
||||
expression E1,E2;
|
||||
identifier f;
|
||||
statement S1,S2,S3,S4;
|
||||
iterator iter;
|
||||
position p!={pr11.p1,pr12.p2};
|
||||
position ifm1.p1;
|
||||
@@
|
||||
|
||||
if@p1 ((E == NULL && ...) || ...)
|
||||
{
|
||||
... when != if (...) S1 else S2
|
||||
(
|
||||
iter(subE,...) S4 // no use
|
||||
|
|
||||
list_remove_head(E2,subE,...)
|
||||
|
|
||||
subE = E1
|
||||
|
|
||||
for(subE = E1;...;...) S4
|
||||
|
|
||||
subE++
|
||||
|
|
||||
++subE
|
||||
|
|
||||
--subE
|
||||
|
|
||||
subE--
|
||||
|
|
||||
&subE
|
||||
|
|
||||
* E->f@p // bad use
|
||||
)
|
||||
... when any
|
||||
}
|
||||
else S3
|
||||
Loading…
Reference in New Issue
Block a user