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comparison gcc/testsuite/c-c++-common/Wstringop-truncation-2.c @ 131:84e7813d76e9

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gcc-8.2
author mir3636
date Thu, 25 Oct 2018 07:37:49 +0900
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111:04ced10e8804 131:84e7813d76e9
1 /* Verify that
2 { dg-do compile }
3 { dg-options "-O2 -Wstringop-truncation -Wno-stringop-overflow -ftrack-macro-expansion=0" } */
4
5 typedef __SIZE_TYPE__ size_t;
6
7 #define stpncpy(d, s, n) __builtin_stpncpy ((d), (s), (n))
8 #define strncpy(d, s, n) __builtin_stpncpy ((d), (s), (n))
9
10 void sink (void*);
11
12 struct A {
13 char arr[3] __attribute__ ((nonstring));
14 char str[3];
15 };
16
17 struct B { struct A a[3]; int i; };
18 struct C { struct B b[3]; int i; };
19
20 void stpncpy_arr_1 (struct C *pc, const char *s)
21 {
22 stpncpy (pc->b[0].a[0].arr, s, sizeof pc->b[0].a[0].arr);
23 sink (pc->b[0].a[0].arr);
24
25 stpncpy (pc->b[0].a[1].arr, s, sizeof pc->b[0].a[1].arr);
26 sink (pc->b[0].a[1].arr);
27
28 stpncpy (pc->b[0].a[2].arr, s, sizeof pc->b[0].a[2].arr);
29 sink (pc->b[0].a[2].arr);
30
31 stpncpy (pc->b[1].a[0].arr, s, sizeof pc->b[1].a[0].arr);
32 sink (pc->b[1].a[0].arr);
33
34 stpncpy (pc->b[1].a[1].arr, s, sizeof pc->b[1].a[1].arr);
35 sink (pc->b[1].a[1].arr);
36
37 stpncpy (pc->b[1].a[2].arr, s, sizeof pc->b[1].a[2].arr);
38 sink (pc->b[1].a[2].arr);
39
40 stpncpy (pc->b[2].a[0].arr, s, sizeof pc->b[2].a[0].arr);
41 sink (pc->b[2].a[0].arr);
42
43 stpncpy (pc->b[2].a[1].arr, s, sizeof pc->b[2].a[1].arr);
44 sink (pc->b[2].a[1].arr);
45
46 stpncpy (pc->b[2].a[2].arr, s, sizeof pc->b[2].a[2].arr);
47 sink (pc->b[2].a[2].arr);
48 }
49
50 void stpncpy_str_nowarn_1 (struct C *pc, const char *s)
51 {
52 stpncpy (pc->b[0].a[0].str, s, sizeof pc->b[0].a[0].str)[-1] = 0; /* { dg-bogus "\\\[-Wstringop-truncation" } */
53 }
54
55 void stpncpy_str_nowarn_2 (struct C *pc, const char *s)
56 {
57 *stpncpy (pc->b[0].a[0].str, s, sizeof pc->b[0].a[0].str - 1) = 0; /* { dg-bogus "\\\[-Wstringop-truncation" } */
58 }
59
60 void stpncpy_str_nowarn_3 (struct C *pc, const char *s)
61 {
62 char *d = stpncpy (pc->b[0].a[0].str, s, sizeof pc->b[0].a[0].str); /* { dg-bogus "\\\[-Wstringop-truncation" } */
63
64 d[-1] = 0;
65 }
66
67 void stpncpy_str_nowarn_4 (struct C *pc, const char *s)
68 {
69 char *d = stpncpy (pc->b[0].a[0].str, s, sizeof pc->b[0].a[0].str - 1); /* { dg-bogus "\\\[-Wstringop-truncation" } */
70
71 *d = 0;
72 }
73
74 void strncpy_arr_1 (struct C *pc, const char *s)
75 {
76 strncpy (pc->b[0].a[0].arr, s, sizeof pc->b[0].a[0].arr);
77 sink (pc->b[0].a[0].arr);
78
79 strncpy (pc->b[0].a[1].arr, s, sizeof pc->b[0].a[1].arr);
80 sink (pc->b[0].a[1].arr);
81
82 strncpy (pc->b[0].a[2].arr, s, sizeof pc->b[0].a[2].arr);
83 sink (pc->b[0].a[2].arr);
84 }
85
86 void strncpy_str_nowarn_1 (struct C *pc, const char *s)
87 {
88 strncpy (pc->b[0].a[0].str, s, sizeof pc->b[0].a[0].str); /* { dg-bogus "\\\[-Wstringop-truncation" } */
89
90 pc->b[0].a[0].str[sizeof pc->b[0].a[0].str - 1] = 0;
91 }
92
93 void strncpy_str_warn_1 (struct C *pc, const char *s)
94 {
95 strncpy (pc->b[0].a[0].str, s, sizeof pc->b[0].a[0].str); /* { dg-warning "specified bound 3 equals destination size" } */
96
97 pc->b[1].a[0].str[sizeof pc->b[0].a[0].str - 1] = 0;
98 }
99
100 void strncpy_str_warn_2 (struct C *pc, const char *s)
101 {
102 strncpy (pc->b[0].a[0].str, s, sizeof pc->b[0].a[0].str); /* { dg-warning "specified bound 3 equals destination size" } */
103
104 pc->b[0].a[1].str[sizeof pc->b[0].a[0].str - 1] = 0;
105 }