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
|
/* PR/tree-optimization/84480 - bogus -Wstringop-truncation despite
assignment with an inlined string literal
{ dg-do compile }
{ dg-options "-O2 -Wstringop-truncation" } */
#include <string.h>
template <size_t N>
class GoodString
{
public:
GoodString (const char *s, size_t slen = N)
{
if (slen > N)
slen = N;
strncpy (str, s, slen);
str[slen] = '\0';
}
private:
char str[N + 1];
};
void sink (void*);
void good_nowarn_size_m2 ()
{
GoodString<3> str ("12");
sink (&str);
}
void good_nowarn_size_m1 ()
{
GoodString<3> str ("123"); // { dg-bogus "\\\[-Wstringop-truncation]" }
sink (&str);
}
void good_nowarn_size_m1_var (const char* s)
{
GoodString<3> str (s); // { dg-bogus "\\\[-Wstringop-truncation]" }
sink (&str);
}
void call_good_nowarn_size_m1_var ()
{
good_nowarn_size_m1_var ("456");
}
template <size_t N>
class BadString1
{
public:
BadString1 (const char *s, size_t slen = N)
{
if (slen > N)
slen = N;
strncpy (str, s, slen);
}
private:
char str[N + 1];
};
void bad1_nowarn_size_m2 ()
{
BadString1<3> str ("12");
sink (&str);
}
template <size_t N>
class BadString2
{
public:
BadString2 (const char *s, size_t slen = N)
{
if (slen > N)
slen = N;
strncpy (str, s, slen); // { dg-warning "\\\[-Wstringop-truncation]" }
}
private:
char str[N + 1];
};
void bad2_warn_size_m1 ()
{
BadString2<3> str ("123");
sink (&str);
}
// { dg-message "inlined from .void bad2_warn_size_m1." "" { target *-*-* } 0 }
template <size_t N>
class BadString3
{
public:
BadString3 (const char *s, size_t slen = N)
{
if (slen > N)
slen = N;
strncpy (str, s, slen); // { dg-warning "\\\[-Wstringop-truncation]" }
}
private:
char str[N + 1];
};
void bad3_warn_size_m1_var (const char *s)
{
BadString3<3> str (s);
sink (&str);
}
void call_bad3_warn_size_m1_var ()
{
bad3_warn_size_m1_var ("456");
}
// { dg-message "inlined from .void call_bad3_warn_size_m1_var." "" { target *-*-* } 0 }
|
