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scripts/coccinelle: improve the coverage of some semantic patches 

This patch ensures that all semantic patches in the scripts/coccinelle
directory provide the report option.  Report messages that include line
numbers now have the line number preceded by "line" for easier subsequent
processing.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Michal Marek <mmarek@suse.cz>
This commit is contained in:
Julia Lawall 2012-01-14 23:41:54 +01:00 committed by Michal Marek
parent fb3f8af4ff
commit 29a36d4dec
11 changed files with 351 additions and 76 deletions
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75
scripts/coccinelle/api/kstrdup.cocci
View File

@ -1,16 +1,19 @@
/// Use kstrdup rather than duplicating its implementation
///
// Confidence: High
// Copyright: (C) 2010 Nicolas Palix, DIKU. GPLv2.
// Copyright: (C) 2010 Julia Lawall, DIKU. GPLv2.
// Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. GPLv2.
// Copyright: (C) 2010-2012 Nicolas Palix. GPLv2.
// Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6. GPLv2.
// Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6. GPLv2.
// URL: http://coccinelle.lip6.fr/
// Comments:
// Options: -no_includes -include_headers
virtual patch
virtual context
virtual org
virtual report
@@
@depends on patch@
expression from,to;
expression flag,E1,E2;
statement S;
@ -23,7 +26,7 @@ statement S;
... when != \(from = E2 \| to = E2 \)
- strcpy(to, from);
@@
@depends on patch@
expression x,from,to;
expression flag,E1,E2,E3;
statement S;
@ -37,3 +40,65 @@ statement S;
if (to==NULL || ...) S
... when != \(x = E3 \| from = E3 \| to = E3 \)
- memcpy(to, from, x);
// ---------------------------------------------------------------------
@r1 depends on !patch exists@
expression from,to;
expression flag,E1,E2;
statement S;
position p1,p2;
@@
* to = kmalloc@p1(strlen(from) + 1,flag);
... when != \(from = E1 \| to = E1 \)
if (to==NULL || ...) S
... when != \(from = E2 \| to = E2 \)
* strcpy@p2(to, from);
@r2 depends on !patch exists@
expression x,from,to;
expression flag,E1,E2,E3;
statement S;
position p1,p2;
@@
* x = strlen(from) + 1;
... when != \( x = E1 \| from = E1 \)
* to = \(kmalloc@p1\|kzalloc@p2\)(x,flag);
... when != \(x = E2 \| from = E2 \| to = E2 \)
if (to==NULL || ...) S
... when != \(x = E3 \| from = E3 \| to = E3 \)
* memcpy@p2(to, from, x);
@script:python depends on org@
p1 << r1.p1;
p2 << r1.p2;
@@
cocci.print_main("WARNING opportunity for kstrdep",p1)
cocci.print_secs("strcpy",p2)
@script:python depends on org@
p1 << r2.p1;
p2 << r2.p2;
@@
cocci.print_main("WARNING opportunity for kstrdep",p1)
cocci.print_secs("memcpy",p2)
@script:python depends on report@
p1 << r1.p1;
p2 << r1.p2;
@@
msg = "WARNING opportunity for kstrdep (strcpy on line %s)" % (p2[0].line)
coccilib.report.print_report(p1[0], msg)
@script:python depends on report@
p1 << r2.p1;
p2 << r2.p2;
@@
msg = "WARNING opportunity for kstrdep (memcpy on line %s)" % (p2[0].line)
coccilib.report.print_report(p1[0], msg)

34
scripts/coccinelle/api/memdup.cocci
View File

@ -1,14 +1,17 @@
/// Use kmemdup rather than duplicating its implementation
///
// Confidence: High
// Copyright: (C) 2010 Nicolas Palix, DIKU. GPLv2.
// Copyright: (C) 2010 Julia Lawall, DIKU. GPLv2.
// Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. GPLv2.
// Copyright: (C) 2010-2012 Nicolas Palix. GPLv2.
// Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6. GPLv2.
// Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6. GPLv2.
// URL: http://coccinelle.lip6.fr/
// Comments:
// Options: -no_includes -include_headers
virtual patch
virtual context
virtual org
virtual report
@r1@
expression from,to;
@ -28,7 +31,7 @@ position p;
... when != \( x = E1 \| from = E1 \)
to = \(kmalloc@p\|kzalloc@p\)(x,flag);
@@
@depends on patch@
expression from,to,size,flag;
position p != {r1.p,r2.p};
statement S;
@ -38,3 +41,26 @@ statement S;
+ to = kmemdup(from,size,flag);
if (to==NULL || ...) S
- memcpy(to, from, size);
@r depends on !patch@
expression from,to,size,flag;
position p != {r1.p,r2.p};
statement S;
@@
* to = \(kmalloc@p\|kzalloc@p\)(size,flag);
to = kmemdup(from,size,flag);
if (to==NULL || ...) S
* memcpy(to, from, size);
@script:python depends on org@
p << r.p;
@@
coccilib.org.print_todo(p[0], "WARNING opportunity for kmemdep")
@script:python depends on report@
p << r.p;
@@
coccilib.report.print_report(p[0], "WARNING opportunity for kmemdep")

39
scripts/coccinelle/api/memdup_user.cocci
View File

@ -1,23 +1,25 @@
/// Use kmemdup_user rather than duplicating its implementation
/// Use memdup_user rather than duplicating its implementation
/// This is a little bit restricted to reduce false positives
///
// Confidence: High
// Copyright: (C) 2010 Nicolas Palix, DIKU. GPLv2.
// Copyright: (C) 2010 Julia Lawall, DIKU. GPLv2.
// Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. GPLv2.
// Copyright: (C) 2010-2012 Nicolas Palix. GPLv2.
// Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6. GPLv2.
// Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6. GPLv2.
// URL: http://coccinelle.lip6.fr/
// Comments:
// Options: -no_includes -include_headers
virtual patch
virtual context
virtual org
virtual report
@@
@depends on patch@
expression from,to,size,flag;
position p;
identifier l1,l2;
@@
- to = \(kmalloc@p\|kzalloc@p\)(size,flag);
- to = \(kmalloc\|kzalloc\)(size,flag);
+ to = memdup_user(from,size);
if (
- to==NULL
@ -33,3 +35,26 @@ identifier l1,l2;
- -EFAULT
- ...+>
- }
@r depends on !patch@
expression from,to,size,flag;
position p;
statement S1,S2;
@@
* to = \(kmalloc@p\|kzalloc@p\)(size,flag);
if (to==NULL || ...) S1
if (copy_from_user(to, from, size) != 0)
S2
@script:python depends on org@
p << r.p;
@@
coccilib.org.print_todo(p[0], "WARNING opportunity for memdep_user")
@script:python depends on report@
p << r.p;
@@
coccilib.report.print_report(p[0], "WARNING opportunity for memdep_user")

14
scripts/coccinelle/free/kfree.cocci
View File

@ -5,9 +5,9 @@
//# SCTP_DBG_OBJCNT_DEC that do not actually evaluate their argument
///
// Confidence: Moderate
// Copyright: (C) 2010 Nicolas Palix, DIKU. GPLv2.
// Copyright: (C) 2010 Julia Lawall, DIKU. GPLv2.
// Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. GPLv2.
// Copyright: (C) 2010-2012 Nicolas Palix. GPLv2.
// Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6. GPLv2.
// Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6. GPLv2.
// URL: http://coccinelle.lip6.fr/
// Comments:
// Options: -no_includes -include_headers
@ -23,7 +23,7 @@ position p1;
kfree@p1(E)
@print expression@
constant char *c;
constant char [] c;
expression free.E,E2;
type T;
position p;
@ -36,6 +36,10 @@ identifier f;
E@p == E2
|
E@p != E2
|
E2 == E@p
|
E2 != E@p
|
!E@p
|
@ -113,5 +117,5 @@ p1 << free.p1;
p2 << r.p2;
@@
msg = "reference preceded by free on line %s" % (p1[0].line)
msg = "ERROR: reference preceded by free on line %s" % (p1[0].line)
coccilib.report.print_report(p2[0],msg)

73
scripts/coccinelle/iterators/fen.cocci
View File

@ -2,16 +2,19 @@
/// is no point to call of_node_put on the final value.
///
// Confidence: High
// Copyright: (C) 2010 Nicolas Palix, DIKU. GPLv2.
// Copyright: (C) 2010 Julia Lawall, DIKU. GPLv2.
// Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. GPLv2.
// Copyright: (C) 2010-2012 Nicolas Palix. GPLv2.
// Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6. GPLv2.
// Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6. GPLv2.
// URL: http://coccinelle.lip6.fr/
// Comments:
// Options: -no_includes -include_headers
virtual patch
virtual context
virtual org
virtual report
@@
@depends on patch@
iterator name for_each_node_by_name;
expression np,E;
identifier l;
@ -24,7 +27,7 @@ for_each_node_by_name(np,...) {
... when != np = E
- of_node_put(np);
@@
@depends on patch@
iterator name for_each_node_by_type;
expression np,E;
identifier l;
@ -37,7 +40,7 @@ for_each_node_by_type(np,...) {
... when != np = E
- of_node_put(np);
@@
@depends on patch@
iterator name for_each_compatible_node;
expression np,E;
identifier l;
@ -50,7 +53,7 @@ for_each_compatible_node(np,...) {
... when != np = E
- of_node_put(np);
@@
@depends on patch@
iterator name for_each_matching_node;
expression np,E;
identifier l;
@ -62,3 +65,59 @@ for_each_matching_node(np,...) {
}
... when != np = E
- of_node_put(np);
// ----------------------------------------------------------------------
@r depends on !patch forall@
//iterator name for_each_node_by_name;
//iterator name for_each_node_by_type;
//iterator name for_each_compatible_node;
//iterator name for_each_matching_node;
expression np,E;
identifier l;
position p1,p2;
@@
(
*for_each_node_by_name@p1(np,...)
{
... when != break;
when != goto l;
}
|
*for_each_node_by_type@p1(np,...)
{
... when != break;
when != goto l;
}
|
*for_each_compatible_node@p1(np,...)
{
... when != break;
when != goto l;
}
|
*for_each_matching_node@p1(np,...)
{
... when != break;
when != goto l;
}
)
... when != np = E
* of_node_put@p2(np);
@script:python depends on org@
p1 << r.p1;
p2 << r.p2;
@@
cocci.print_main("unneeded of_node_put",p2)
cocci.print_secs("iterator",p1)
@script:python depends on report@
p1 << r.p1;
p2 << r.p2;
@@
msg = "ERROR: of_node_put not needed after iterator on line %s" % (p1[0].line)
coccilib.report.print_report(p2[0], msg)

54
scripts/coccinelle/iterators/itnull.cocci
View File

@ -1,20 +1,24 @@
/// Many iterators have the property that the first argument is always bound
/// to a real list element, never NULL. False positives arise for some
/// iterators that do not have this property, or in cases when the loop
/// cursor is reassigned. The latter should only happen when the matched
/// code is on the way to a loop exit (break, goto, or return).
/// to a real list element, never NULL.
//# False positives arise for some iterators that do not have this property,
//# or in cases when the loop cursor is reassigned. The latter should only
//# happen when the matched code is on the way to a loop exit (break, goto,
//# or return).
///
// Confidence: Moderate
// Copyright: (C) 2010 Nicolas Palix, DIKU. GPLv2.
// Copyright: (C) 2010 Julia Lawall, DIKU. GPLv2.
// Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. GPLv2.
// Copyright: (C) 2010-2012 Nicolas Palix. GPLv2.
// Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6. GPLv2.
// Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6. GPLv2.
// URL: http://coccinelle.lip6.fr/
// Comments:
// Options: -no_includes -include_headers
virtual patch
virtual context
virtual org
virtual report
@@
@depends on patch@
iterator I;
expression x,E,E1,E2;
statement S,S1,S2;
@ -55,4 +59,36 @@ I(x,...) { <...
x != NULL
+ )
)
...> }
...> }
@r depends on !patch exists@
iterator I;
expression x,E;
position p1,p2;
@@
*I@p1(x,...)
{ ... when != x = E
(
* x@p2 == NULL
|
* x@p2 != NULL
)
... when any
}
@script:python depends on org@
p1 << r.p1;
p2 << r.p2;
@@
cocci.print_main("iterator-bound variable",p1)
cocci.print_secs("useless NULL test",p2)
@script:python depends on report@
p1 << r.p1;
p2 << r.p2;
@@
msg = "ERROR: iterator variable bound on line %s cannot be NULL" % (p1[0].line)
coccilib.report.print_report(p2[0], msg)

67
scripts/coccinelle/locks/call_kern.cocci
View File

@ -1,17 +1,20 @@
/// Find functions that refer to GFP_KERNEL but are called with locks held.
/// The proposed change of converting the GFP_KERNEL is not necessarily the
/// correct one. It may be desired to unlock the lock, or to not call the
/// function under the lock in the first place.
//# The proposed change of converting the GFP_KERNEL is not necessarily the
//# correct one. It may be desired to unlock the lock, or to not call the
//# function under the lock in the first place.
///
// Confidence: Moderate
// Copyright: (C) 2010 Nicolas Palix, DIKU. GPLv2.
// Copyright: (C) 2010 Julia Lawall, DIKU. GPLv2.
// Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. GPLv2.
// Copyright: (C) 2012 Nicolas Palix. GPLv2.
// Copyright: (C) 2012 Julia Lawall, INRIA/LIP6. GPLv2.
// Copyright: (C) 2012 Gilles Muller, INRIA/LiP6. GPLv2.
// URL: http://coccinelle.lip6.fr/
// Comments:
// Options: -no_includes -include_headers
virtual patch
virtual context
virtual org
virtual report
@gfp exists@
identifier fn;
@ -32,28 +35,29 @@ fn(...) {
... when any
}
@locked@
@locked exists@
identifier gfp.fn;
position p1,p2;
@@
(
read_lock_irq
read_lock_irq@p1
|
write_lock_irq
write_lock_irq@p1
|
read_lock_irqsave
read_lock_irqsave@p1
|
write_lock_irqsave
write_lock_irqsave@p1
|
spin_lock
spin_lock@p1
|
spin_trylock
spin_trylock@p1
|
spin_lock_irq
spin_lock_irq@p1
|
spin_lock_irqsave
spin_lock_irqsave@p1
|
local_irq_disable
local_irq_disable@p1
)
(...)
... when != read_unlock_irq(...)
@ -64,11 +68,38 @@ local_irq_disable
when != spin_unlock_irq(...)
when != spin_unlock_irqrestore(...)
when != local_irq_enable(...)
fn(...)
fn@p2(...)
@depends on locked@
@depends on locked && patch@
position gfp.p;
@@
- GFP_KERNEL@p
+ GFP_ATOMIC
@depends on locked && !patch@
position gfp.p;
@@
* GFP_KERNEL@p
@script:python depends on !patch && org@
p << gfp.p;
fn << gfp.fn;
p1 << locked.p1;
p2 << locked.p2;
@@
cocci.print_main("lock",p1)
cocci.print_secs("call",p2)
cocci.print_secs("GFP_KERNEL",p)
@script:python depends on !patch && report@
p << gfp.p;
fn << gfp.fn;
p1 << locked.p1;
p2 << locked.p2;
@@
msg = "ERROR: function %s called on line %s inside lock on line %s but uses GFP_KERNEL" % (fn,p2[0].line,p1[0].line)
coccilib.report.print_report(p[0], msg)

12
scripts/coccinelle/locks/flags.cocci
View File

@ -1,9 +1,9 @@
/// Find nested lock+irqsave functions that use the same flags variables
///
// Confidence: High
// Copyright: (C) 2010 Nicolas Palix, DIKU. GPLv2.
// Copyright: (C) 2010 Julia Lawall, DIKU. GPLv2.
// Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. GPLv2.
// Copyright: (C) 2010-2012 Nicolas Palix. GPLv2.
// Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6. GPLv2.
// Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6. GPLv2.
// URL: http://coccinelle.lip6.fr/
// Comments:
// Options: -no_includes -include_headers
@ -12,7 +12,7 @@ virtual context
virtual org
virtual report
@r@
@r exists@
expression lock1,lock2,flags;
position p1,p2;
@@
@ -39,7 +39,7 @@ read_lock_irqsave@p2(lock2,flags)
write_lock_irqsave@p2(lock2,flags)
)
@d@
@d exists@
expression f <= r.flags;
expression lock1,lock2,flags;
position r.p1, r.p2;
@ -76,5 +76,5 @@ p1 << r.p1;
p2 << r.p2;
@@
msg="ERROR: nested lock+irqsave that reuses flags from %s." % (p1[0].line)
msg="ERROR: nested lock+irqsave that reuses flags from line %s." % (p1[0].line)
coccilib.report.print_report(p2[0], msg)

15
scripts/coccinelle/locks/mini_lock.cocci
View File

@ -6,13 +6,14 @@
/// 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.
// Copyright: (C) 2010-2012 Nicolas Palix. GPLv2.
// Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6. GPLv2.
// Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6. GPLv2.
// URL: http://coccinelle.lip6.fr/
// Comments:
// Options: -no_includes -include_headers
virtual context
virtual org
virtual report
@ -57,7 +58,7 @@ position r;
for(...;...;...) { <+... return@r ...; ...+> }
@err@
@err exists@
expression E1;
position prelocked.p;
position up != prelocked.p1;
@ -65,14 +66,14 @@ position r!=looped.r;
identifier lock,unlock;
@@
lock(E1@p,...);
*lock(E1@p,...);
<+... when != E1
if (...) {
... when != E1
return@r ...;
* return@r ...;
}
...+>
unlock@up(E1,...);
*unlock@up(E1,...);
@script:python depends on org@
p << prelocked.p1;

8
scripts/coccinelle/misc/doubleinit.cocci
View File

@ -3,9 +3,9 @@
/// initialization.
///
// Confidence: Low
// Copyright: (C) 2010 Nicolas Palix, DIKU. GPLv2.
// Copyright: (C) 2010 Julia Lawall, DIKU. GPLv2.
// Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. GPLv2.
// Copyright: (C) 2010-2012 Nicolas Palix. GPLv2.
// Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6. GPLv2.
// Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6. GPLv2.
// URL: http://coccinelle.lip6.fr/
// Comments: requires at least Coccinelle 0.2.4, lex or parse error otherwise
// Options: -no_includes -include_headers
@ -49,5 +49,5 @@ pr << r.p;
@@
if int(ps[0].line) < int(pr[0].line) or (int(ps[0].line) == int(pr[0].line) and int(ps[0].column) < int(pr[0].column)):
msg = "%s: first occurrence %s, second occurrence %s" % (fld,ps[0].line,pr[0].line)
msg = "%s: first occurrence line %s, second occurrence line %s" % (fld,ps[0].line,pr[0].line)
coccilib.report.print_report(p0[0],msg)

36
scripts/coccinelle/null/eno.cocci
View File

@ -1,16 +1,19 @@
/// The various basic memory allocation functions don't return ERR_PTR
///
// Confidence: High
// Copyright: (C) 2010 Nicolas Palix, DIKU. GPLv2.
// Copyright: (C) 2010 Julia Lawall, DIKU. GPLv2.
// Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. GPLv2.
// Copyright: (C) 2010-2012 Nicolas Palix. GPLv2.
// Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6. GPLv2.
// Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6. GPLv2.
// URL: http://coccinelle.lip6.fr/
// Comments:
// Options: -no_includes -include_headers
virtual patch
virtual context
virtual org
virtual report
@@
@depends on patch@
expression x,E;
@@
@ -18,3 +21,28 @@ x = \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|kmem_cache
... when != x = E
- IS_ERR(x)
+ !x
@r depends on !patch exists@
expression x,E;
position p1,p2;
@@
*x = \(kmalloc@p1\|kzalloc@p1\|kcalloc@p1\|kmem_cache_alloc@p1\|kmem_cache_zalloc@p1\|kmem_cache_alloc_node@p1\|kmalloc_node@p1\|kzalloc_node@p1\)(...)
... when != x = E
* IS_ERR@p2(x)
@script:python depends on org@
p1 << r.p1;
p2 << r.p2;
@@
cocci.print_main("alloc call",p1)
cocci.print_secs("IS_ERR that should be NULL tests",p2)
@script:python depends on report@
p1 << r.p1;
p2 << r.p2;
@@
msg = "ERROR: allocation function on line %s returns NULL not ERR_PTR on failure" % (p1[0].line)
coccilib.report.print_report(p2[0], msg)