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C++: Add test for Dereferenced.qll.

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This commit is contained in:
Geoffrey White
2022-06-14 13:19:49 +01:00
parent f7cc46b84b
commit 512731a38d
3 changed files with 68 additions and 0 deletions
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49
cpp/ql/test/library-tests/controlflow/dereferenced/dereferenced.cpp Normal file
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int *global_ptr;
const char *global_string = "hello, world";
void test1(int *ptr, int &ref)
{
const char *str;
int v, *p;
char c;
v = *ptr; // `ptr` dereferenced
v = ptr[0]; // `ptr` dereferenced
p = ptr;
*ptr = 0; // `ptr` dereferenced
ptr[0] = 0; // `ptr` dereferenced
ptr = 0;
(*ptr)++; // `ptr` dereferenced
*(ptr++); // `ptr++` dereferenced
ptr++;
v = ref; // (`ref` implicitly dereferenced, not detected)
p = &ref;
ref = 0; // (`ref` implicitly dereferenced, not detected)
ref++; // (`ref` implicitly dereferenced, not detected)
*global_ptr; // `global_ptr` dereferenced
str = global_string;
c = global_string[5]; // `global_string` dereferenced
}
struct myStruct
{
int x;
void f() {};
void (*g)();
};
void test1(myStruct *ms)
{
void (*h)();
ms;
ms->x; // `ms` dereferenced
ms->f(); // `ms` dereferenced
ms->g(); // `ms` dereferenced
h = ms->g; // `ms` dereferenced
}

13
cpp/ql/test/library-tests/controlflow/dereferenced/dereferenced.expected Normal file
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| dereferenced.cpp:11:6:11:9 | * ... | dereferenced.cpp:11:7:11:9 | ptr |
| dereferenced.cpp:12:6:12:11 | access to array | dereferenced.cpp:12:6:12:8 | ptr |
| dereferenced.cpp:15:2:15:5 | * ... | dereferenced.cpp:15:3:15:5 | ptr |
| dereferenced.cpp:16:2:16:7 | access to array | dereferenced.cpp:16:2:16:4 | ptr |
| dereferenced.cpp:19:3:19:6 | * ... | dereferenced.cpp:19:4:19:6 | ptr |
| dereferenced.cpp:19:4:19:6 | ptr | dereferenced.cpp:19:3:19:6 | * ... |
| dereferenced.cpp:20:2:20:9 | * ... | dereferenced.cpp:20:4:20:8 | ... ++ |
| dereferenced.cpp:28:2:28:12 | * ... | dereferenced.cpp:28:3:28:12 | global_ptr |
| dereferenced.cpp:30:6:30:21 | access to array | dereferenced.cpp:30:6:30:18 | global_string |
| dereferenced.cpp:45:6:45:6 | x | dereferenced.cpp:45:2:45:3 | ms |
| dereferenced.cpp:46:6:46:6 | call to f | dereferenced.cpp:46:2:46:3 | ms |
| dereferenced.cpp:47:6:47:6 | g | dereferenced.cpp:47:2:47:3 | ms |
| dereferenced.cpp:48:10:48:10 | g | dereferenced.cpp:48:6:48:7 | ms |

6
cpp/ql/test/library-tests/controlflow/dereferenced/dereferenced.ql Normal file
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import cpp
import semmle.code.cpp.controlflow.Dereferenced
from Expr op, Expr e
where dereferencedByOperation(op, e) // => dereferenced(e)
select op, e