From: Joe Perches <joe@perches.com>
To: cocci <cocci@systeme.lip6.fr>
Subject: [Cocci] Coccinelle: Length/Size of char array?
Date: Mon, 02 Aug 2021 10:00:26 -0700 [thread overview]
Message-ID: <ab04588b3b0c2bfa6942beb9069754ce59f2551b.camel@perches.com> (raw)
Is it possible to determine the length of a matched char array and use
the length in a test?
For instance, add something like a test to show only the instances
where a src buffer overruns a dest buffer.
void foo(void)
{
char foo[5];
strcpy(foo, "fits");
}
it would be useful to see only the instances where the dest
buffer would be overrun like:
void foo(void)
{
char foo[5];
strcpy(foo, "doesn't fit");
}
---
This would find all instances of a constant src array into non-pointer dst:
@@
char [] dest;
constant char [] src;
@@
* strcpy(dest, src)
---
Is there a mexhanism like:
@@
char [] dest;
constant char [] src;
@@
when (some cocci grammar testing length(dest) < length(src))
* strcpy(dest, src)
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next reply other threads:[~2021-08-02 19:26 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-02 17:00 Joe Perches [this message]
2021-08-02 17:35 ` [Cocci] Coccinelle: Length/Size of char array? Julia Lawall
2021-08-02 17:43 ` Joe Perches
2021-08-02 18:05 ` Julia Lawall
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