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
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
/* Test -Wsizeof-pointer-memaccess warnings. */
/* { dg-do compile } */
/* { dg-options "-Wall -Wno-array-bounds -Wno-sizeof-array-argument -Wno-stringop-overflow -Wno-stringop-overread" } */
/* { dg-options "-Wall -Wno-array-bounds -Wno-sizeof-array-argument -Wno-c++-compat -Wno-stringop-overflow -Wno-stringop-overread" { target c } } */
/* { dg-require-effective-target alloca } */
typedef __SIZE_TYPE__ size_t;
#ifdef __cplusplus
extern "C" {
#endif
extern int snprintf (char *, size_t, const char *, ...);
extern int vsnprintf (char *, size_t, const char *, __builtin_va_list);
extern void *memchr (const void *, int, size_t);
#ifdef __cplusplus
}
#endif
struct A { short a, b; int c, d; long e, f; };
typedef struct A TA;
typedef struct A *PA;
typedef TA *PTA;
struct B {};
typedef struct B TB;
typedef struct B *PB;
typedef TB *PTB;
typedef int X[3][3][3];
void foo (void **);
void
f1 (void *x)
{
struct A a, *pa1 = &a;
TA *pa2 = &a;
PA pa3 = &a;
PTA pa4 = &a;
void *arr[100];
int i = 0;
arr[i++] = memchr (&a, 0, sizeof (&a)); /* { dg-warning "call is the same expression as the source; did you mean to remove the addressof" } */
arr[i++] = memchr (pa1, 0, sizeof (pa1)); /* { dg-warning "call is the same expression as the source; did you mean to dereference it" } */
arr[i++] = memchr (pa2, 0, sizeof pa2); /* { dg-warning "call is the same expression as the source; did you mean to dereference it" } */
arr[i++] = memchr (pa3, 0, sizeof (pa3)); /* { dg-warning "call is the same expression as the source; did you mean to dereference it" } */
arr[i++] = memchr (pa4, 0, sizeof pa4); /* { dg-warning "call is the same expression as the source; did you mean to dereference it" } */
arr[i++] = memchr (pa1, 0, sizeof (struct A *)); /* { dg-warning "call is the same pointer type \[^\n\r\]* as the source; expected \[^\n\r\]* or an explicit length" } */
arr[i++] = memchr (pa2, 0, sizeof (PTA)); /* { dg-warning "call is the same pointer type \[^\n\r\]* as the source; expected \[^\n\r\]* or an explicit length" } */
arr[i++] = memchr (pa3, 0, sizeof (PA)); /* { dg-warning "call is the same pointer type \[^\n\r\]* as the source; expected \[^\n\r\]* or an explicit length" } */
arr[i++] = memchr (pa4, 0, sizeof (__typeof (pa4))); /* { dg-warning "call is the same pointer type \[^\n\r\]* as the source; expected \[^\n\r\]* or an explicit length" } */
/* These are correct, no warning. */
arr[i++] = memchr (&a, 0, sizeof a);
arr[i++] = memchr (&a, 0, sizeof (a));
arr[i++] = memchr (&a, 0, sizeof (struct A));
arr[i++] = memchr (&a, 0, sizeof (const struct A));
arr[i++] = memchr (&a, 0, sizeof (volatile struct A));
arr[i++] = memchr (&a, 0, sizeof (volatile const struct A));
arr[i++] = memchr (&a, 0, sizeof (TA));
arr[i++] = memchr (&a, 0, sizeof (__typeof (*&a)));
arr[i++] = memchr (pa1, 0, sizeof (*pa1));
arr[i++] = memchr (pa2, 0, sizeof (*pa3));
arr[i++] = memchr (pa3, 0, sizeof (__typeof (*pa3)));
/* These are probably broken, but obfuscated, no warning. */
arr[i++] = memchr ((void *) &a, 0, sizeof (&a));
arr[i++] = memchr ((char *) &a, 0, sizeof (&a));
arr[i++] = memchr (&a, 0, sizeof (&a) + 0);
arr[i++] = memchr (&a, 0, 0 + sizeof (&a));
foo (arr);
}
void
f2 (void *x)
{
struct B b, *pb1 = &b;
TB *pb2 = &b;
PB pb3 = &b;
PTB pb4 = &b;
void *arr[100];
int i = 0;
arr[i++] = memchr (&b, 0, sizeof (&b)); /* { dg-warning "call is the same expression as the source; did you mean to remove the addressof" } */
arr[i++] = memchr (pb1, 0, sizeof (pb1)); /* { dg-warning "call is the same expression as the source; did you mean to dereference it" } */
arr[i++] = memchr (pb2, 0, sizeof pb2); /* { dg-warning "call is the same expression as the source; did you mean to dereference it" } */
arr[i++] = memchr (pb3, 0, sizeof (pb3)); /* { dg-warning "call is the same expression as the source; did you mean to dereference it" } */
arr[i++] = memchr (pb4, 0, sizeof pb4); /* { dg-warning "call is the same expression as the source; did you mean to dereference it" } */
arr[i++] = memchr (pb1, 0, sizeof (struct B *)); /* { dg-warning "call is the same pointer type \[^\n\r\]* as the source; expected \[^\n\r\]* or an explicit length" } */
arr[i++] = memchr (pb2, 0, sizeof (PTB)); /* { dg-warning "call is the same pointer type \[^\n\r\]* as the source; expected \[^\n\r\]* or an explicit length" } */
arr[i++] = memchr (pb3, 0, sizeof (PB)); /* { dg-warning "call is the same pointer type \[^\n\r\]* as the source; expected \[^\n\r\]* or an explicit length" } */
arr[i++] = memchr (pb4, 0, sizeof (__typeof (pb4))); /* { dg-warning "call is the same pointer type \[^\n\r\]* as the source; expected \[^\n\r\]* or an explicit length" } */
/* These are correct, no warning. */
arr[i++] = memchr (&b, 0, sizeof b);
arr[i++] = memchr (&b, 0, sizeof (b));
arr[i++] = memchr (&b, 0, sizeof (struct B));
arr[i++] = memchr (&b, 0, sizeof (const struct B));
arr[i++] = memchr (&b, 0, sizeof (volatile struct B));
arr[i++] = memchr (&b, 0, sizeof (volatile const struct B));
arr[i++] = memchr (&b, 0, sizeof (TB));
arr[i++] = memchr (&b, 0, sizeof (__typeof (*&b)));
arr[i++] = memchr (pb1, 0, sizeof (*pb1));
arr[i++] = memchr (pb2, 0, sizeof (*pb3));
arr[i++] = memchr (pb3, 0, sizeof (__typeof (*pb3)));
/* These are probably broken, but obfuscated, no warning. */
arr[i++] = memchr ((void *) &b, 0, sizeof (&b));
arr[i++] = memchr ((char *) &b, 0, sizeof (&b));
arr[i++] = memchr (&b, 0, sizeof (&b) + 0);
arr[i++] = memchr (&b, 0, 0 + sizeof (&b));
foo (arr);
}
void
f3 (void *x, char *y, int z, X w)
{
unsigned char *y1 = (unsigned char *) __builtin_alloca (z + 16);
char buf1[7];
signed char buf2[z + 32];
long buf3[17];
int *buf4[9];
signed char *y2 = buf2;
char c;
void *arr[100];
int i = 0;
arr[i++] = memchr (y, 0, sizeof (y)); /* { dg-warning "call is the same expression as the source; did you mean to provide an explicit length" } */
arr[i++] = memchr (y1, 0, sizeof (y1)); /* { dg-warning "call is the same expression as the source; did you mean to provide an explicit length" } */
arr[i++] = memchr (y2, 0, sizeof (y2)); /* { dg-warning "call is the same expression as the source; did you mean to provide an explicit length" } */
arr[i++] = memchr (&c, 0, sizeof (&c)); /* { dg-warning "call is the same expression as the source; did you mean to remove the addressof" } */
arr[i++] = memchr (w, 0, sizeof w); /* { dg-warning "call is the same expression as the source; did you mean to dereference it" } */
/* These are correct, no warning. */
arr[i++] = memchr (y, 0, sizeof (*y));
arr[i++] = memchr (y1, 0, sizeof (*y2));
arr[i++] = memchr (buf1, 0, sizeof buf1);
arr[i++] = memchr (buf3, 0, sizeof (buf3));
arr[i++] = memchr (&buf3[0], 0, sizeof (buf3));
arr[i++] = memchr (&buf4[0], 0, sizeof (buf4));
arr[i++] = memchr (w, 0, sizeof (X));
/* These are probably broken, but obfuscated, no warning. */
arr[i++] = memchr ((void *) y, 0, sizeof (y));
arr[i++] = memchr ((char *) y1, 0, sizeof (y2));
arr[i++] = memchr (y, 0, sizeof (y) + 0);
arr[i++] = memchr (y1, 0, 0 + sizeof (y2));
arr[i++] = memchr ((void *) &c, 0, sizeof (&c));
arr[i++] = memchr ((signed char *) &c, 0, sizeof (&c));
arr[i++] = memchr (&c, 0, sizeof (&c) + 0);
arr[i++] = memchr (&c, 0, 0 + sizeof (&c));
foo (arr);
}
void
f4 (char x[64], char *y, __builtin_va_list ap)
{
char buf[128], *p = buf;
snprintf (x, sizeof (x), "%s", y); /* { dg-warning "call is the same expression as the destination; did you mean to provide an explicit length" } */
vsnprintf (x, sizeof (x), "%s", ap); /* { dg-warning "call is the same expression as the destination; did you mean to provide an explicit length" } */
snprintf (p, sizeof (p), "%s", y); /* { dg-warning "call is the same expression as the destination; did you mean to provide an explicit length" } */
vsnprintf (p, sizeof (p), "%s", ap); /* { dg-warning "call is the same expression as the destination; did you mean to provide an explicit length" } */
/* These are correct, no warning. */
snprintf (buf, sizeof (buf), "%s", y);
vsnprintf (buf, sizeof (buf), "%s", ap);
snprintf (p, sizeof (buf), "%s", y);
vsnprintf (p, sizeof (buf), "%s", ap);
}
/* { dg-prune-output "-Wuninitialized" } */
|
