File: pointer_sensitivity_tests.c

package info (click to toggle)
cbmc 5.10-5
  • links: PTS
  • area: main
  • in suites: buster
  • size: 73,416 kB
  • sloc: cpp: 264,330; ansic: 38,268; java: 19,025; python: 4,539; yacc: 4,275; makefile: 2,547; lex: 2,394; sh: 932; perl: 525; xml: 289; pascal: 169
file content (53 lines) | stat: -rw-r--r-- 847 bytes parent folder | download | duplicates (2) 
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
49
50
51
52
53
 
#include <assert.h>

int main(int argc, char *argv[])
{
  // Test how well we can represent pointers
  // Basic use of addresses
  int a=0;
  int b=0;
  int c=0;
  int *x=&a;
  int *x2=&a;
  int *y=&b;
  assert(x==&a);
  assert(x==&b);
  assert(x==x2);
  assert(x==y);

  // Reading from a dereferenced pointer
  assert(*x==0);
  assert(*x==1);

  // Modify the referenced value and access it through the pointer again
  a=1;
  assert(*x==1);
  assert(*x==0);

  // Writing to a dereferenced pointer
  *x=2;
  assert(a==2);
  assert(a==0);

  // Conditionally reassign the pointer, but to the same value
  if(argc>2)
  {
    x=&a;
  }
  assert(x==&a);

  // Conditionally reassign the pointer, to a different value this time
  if(argc>3)
  {
    x=&b;
  }
  else
  {
    x=&c;
  }
  assert(*x==0);
  assert(x==&a);
  assert(x==&b);

  return 0;
}