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
|
// RUN: %clang_analyze_cc1 -analyzer-checker=core -analyzer-output=text -verify %s
// RUN: %clang_analyze_cc1 -analyzer-checker=core -analyzer-output=plist-multi-file %s -o %t.plist
// RUN: %normalize_plist <%t.plist | diff -ub %S/Inputs/expected-plists/deref-track-symbolic-region.c.plist -
struct S {
int *x;
int y;
};
int *foo();
void test(struct S syz, int *pp) {
int m = 0;
syz.x = foo(); // expected-note{{Value assigned to 'syz.x'}}
struct S *ps = &syz;
if (ps->x)
//expected-note@-1{{Assuming field 'x' is null}}
//expected-note@-2{{Taking false branch}}
m++;
m += *syz.x; // expected-warning{{Dereference of null pointer (loaded from field 'x')}}
// expected-note@-1{{Dereference of null pointer (loaded from field 'x')}}
}
void testTrackConstraintBRVisitorIsTrackingTurnedOn(struct S syz, int *pp) {
int m = 0;
syz.x = foo(); // expected-note{{Value assigned to 'syz.x'}}
struct S *ps = &syz;
if (ps->x)
//expected-note@-1{{Assuming field 'x' is null}}
//expected-note@-2{{Taking false branch}}
m++;
int *p = syz.x; //expected-note {{'p' initialized to a null pointer value}}
m = *p; // expected-warning {{Dereference of null pointer (loaded from variable 'p')}}
// expected-note@-1 {{Dereference of null pointer (loaded from variable 'p')}}
}
|
