uninit-vals-ps.c revision e1cea75e70d76f55157749a7bcad319050492945 
1// RUN: clang-cc -analyze -checker-cfref -analyzer-store=basic -verify %s &&
2// RUN: clang-cc -analyze -checker-cfref -analyzer-store=basic-new-cast -verify %s &&
3// RUN: clang-cc -analyze -checker-cfref -analyzer-store=region -verify %s
4
5struct FPRec {
6  void (*my_func)(int * x);
7};
8
9int bar(int x);
10
11int f1_a(struct FPRec* foo) {
12  int x;
13  (*foo->my_func)(&x);
14  return bar(x)+1; // no-warning
15}
16
17int f1_b() {
18  int x;
19  return bar(x)+1;  // expected-warning{{Pass-by-value argument in function call is undefined.}}
20}
21
22int f2() {
23
24  int x;
25
26  if (x+1)  // expected-warning{{Branch}}
27    return 1;
28
29  return 2;
30}
31
32int f2_b() {
33  int x;
34
35  return ((x+1)+2+((x))) + 1 ? 1 : 2; // expected-warning{{Branch}}
36}
37
38int f3(void) {
39  int i;
40  int *p = &i;
41  if (*p > 0) // expected-warning{{Branch condition evaluates to an uninitialized value}}
42    return 0;
43  else
44    return 1;
45}
46
47void f4_aux(float* x);
48float f4(void) {
49  float x;
50  f4_aux(&x);
51  return x;  // no-warning
52}
53
54struct f5_struct { int x; };
55void f5_aux(struct f5_struct* s);
56int f5(void) {
57  struct f5_struct s;
58  f5_aux(&s);
59  return s.x; // no-warning
60}
61
62int ret_uninit() {
63  int i;
64  int *p = &i;
65  return *p;  // expected-warning{{Uninitialized or undefined value returned to caller.}}
66}
67
68// <rdar://problem/6451816>
69typedef unsigned char Boolean;
70typedef const struct __CFNumber * CFNumberRef;
71typedef signed long CFIndex;
72typedef CFIndex CFNumberType;
73typedef unsigned long UInt32;
74typedef UInt32 CFStringEncoding;
75typedef const struct __CFString * CFStringRef;
76extern Boolean CFNumberGetValue(CFNumberRef number, CFNumberType theType, void *valuePtr);
77extern CFStringRef CFStringConvertEncodingToIANACharSetName(CFStringEncoding encoding);
78
79CFStringRef rdar_6451816(CFNumberRef nr) {
80  CFStringEncoding encoding;
81  // &encoding is casted to void*.  This test case tests whether or not
82  // we properly invalidate the value of 'encoding'.
83  CFNumberGetValue(nr, 9, &encoding);
84  return CFStringConvertEncodingToIANACharSetName(encoding); // no-warning
85}
86
87