File: sharing2.c

package info (click to toggle)
splint 1%3A3.1.2%2Bdfsg-1
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 21,012 kB
  • ctags: 23,302
  • sloc: ansic: 150,869; yacc: 3,465; sh: 3,034; makefile: 2,160; lex: 412
file content (48 lines) | stat: -rw-r--r-- 822 bytes parent folder | download | duplicates (10)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
extern /*@out@*/ /*@only@*/ void *smalloc (unsigned int size);

typedef int mint;

typedef struct _st
{
  int a;
  /*@only@*/ int *b;
  /*@shared@*/ mint *c;
  int d;
} *st;

/*@only@*/ st st_create1 ()
{
  st res = (st) smalloc (sizeof(struct _st));
  int *z;

  res->a = 3; 
  z = res->b;   /* res->b not defined */
  z = (*res).c; /* (*res).c not defined */

  return res;   /* res->d not defined */
}

void f1(/*@only@*/ st x)
{
  free (x->b);
  free (x);
} /* correct */

void f2(/*@only@*/ st x) 
{
  free (x);
} /* bad --- didn't release x->b */
     
void f3(/*@only@*/ st x) 
{
  free (x->c); /* bad --- x->c is shared */
} /* bad --- didn't release x */

/*@only@*/ st st_create ()
{
  st res = (st) smalloc(sizeof(struct _st));
  res->a = 3; 
  return res; /* 6, 7, 8. res->b, res->c, res->d not defined */
}