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131
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1 /* PR middle-end/84725 - enable attribute nonstring for all narrow character
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2 types
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3 Verify that -Wstringop-truncation is issued for uses of arrays and
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4 pointers to qualified forms of characters of all three types.
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5 { dg-do compile }
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6 { dg-options "-O2 -Wall -Wstringop-truncation" } */
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7
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8 #if __cplusplus
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9 extern "C"
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10 #endif
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11 char* strncpy (char*, const char*, __SIZE_TYPE__);
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12
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13 #define S "1234"
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14
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15 struct Arrays
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16 {
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17 char a[4];
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18 signed char b[4];
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19 unsigned char c[4];
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20 };
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21
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22 void test_arrays (struct Arrays *p, const char *s)
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23 {
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24 strncpy (p->a, s, sizeof p->a); /* { dg-warning "\\\[-Wstringop-truncation" } */
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25 strncpy ((char*)p->b, s, sizeof p->b); /* { dg-warning "\\\[-Wstringop-truncation" } */
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26 strncpy ((char*)p->c, s, sizeof p->c); /* { dg-bogus "\\\[-Wstringop-truncation" } */
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27 }
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28
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29 struct Pointers
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30 {
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31 char *p;
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32 signed char *q;
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33 unsigned char *r;
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34 };
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35
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36 void test_pointers (struct Pointers *p)
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37 {
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38 strncpy (p->p, S, sizeof S - 1); /* { dg-warning "\\\[-Wstringop-truncation" } */
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39 strncpy ((char*)p->q, S, sizeof S - 1); /* { dg-warning "\\\[-Wstringop-truncation" } */
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40 strncpy ((char*)p->r, S, sizeof S - 1); /* { dg-warning "\\\[-Wstringop-truncation" } */
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41 }
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42
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43 struct ConstArrays
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44 {
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45 const char a[4];
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46 const signed char b[4];
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47 const unsigned char c[4];
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48 };
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49
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50 void test_const_arrays (struct ConstArrays *p, const char *s)
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51 {
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52 strncpy ((char*)p->a, s, sizeof p->a); /* { dg-warning "\\\[-Wstringop-truncation" } */
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53 strncpy ((char*)p->b, s, sizeof p->b); /* { dg-warning "\\\[-Wstringop-truncation" } */
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54 strncpy ((char*)p->c, s, sizeof p->c); /* { dg-bogus "\\\[-Wstringop-truncation" } */
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55 }
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56
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57 struct ConstPointers
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58 {
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59 const char *p;
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60 const signed char *q;
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61 const unsigned char *r;
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62 };
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63
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64 void test_const_pointers (struct ConstPointers *p)
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65 {
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66 strncpy ((char*)p->p, S, sizeof S - 1); /* { dg-warning "\\\[-Wstringop-truncation" } */
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67 strncpy ((char*)p->q, S, sizeof S - 1); /* { dg-warning "\\\[-Wstringop-truncation" } */
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68 strncpy ((char*)p->r, S, sizeof S - 1); /* { dg-warning "\\\[-Wstringop-truncation" } */
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69 }
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70
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71 struct VolatileArrays
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72 {
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73 volatile char a[4];
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74 volatile signed char b[4];
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75 volatile unsigned char c[4];
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76 };
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77
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78 void test_volatile_arrays (struct VolatileArrays *p, const char *s)
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79 {
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80 strncpy ((char*)p->a, s, sizeof p->a); /* { dg-warning "\\\[-Wstringop-truncation" } */
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81 strncpy ((char*)p->b, s, sizeof p->b); /* { dg-warning "\\\[-Wstringop-truncation" } */
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82 strncpy ((char*)p->c, s, sizeof p->c); /* { dg-bogus "\\\[-Wstringop-truncation" } */
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83 }
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84
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85 struct VolatilePointers
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86 {
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87 volatile char *p;
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88 volatile signed char *q;
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89 volatile unsigned char *r;
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90 };
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91
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92 void test_volatile_pointers (struct VolatilePointers *p)
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93 {
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94 strncpy ((char*)p->p, S, sizeof S - 1); /* { dg-warning "\\\[-Wstringop-truncation" } */
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95 strncpy ((char*)p->q, S, sizeof S - 1); /* { dg-warning "\\\[-Wstringop-truncation" } */
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96 strncpy ((char*)p->r, S, sizeof S - 1); /* { dg-warning "\\\[-Wstringop-truncation" } */
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97 }
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98
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99 struct ConstVolatileArrays
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100 {
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101 const volatile char a[4];
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102 const volatile signed char b[4];
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103 const volatile unsigned char c[4];
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104 };
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105
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106 void test_const_volatile_arrays (struct ConstVolatileArrays *p, const char *s)
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107 {
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108 strncpy ((char*)p->a, s, sizeof p->a); /* { dg-warning "\\\[-Wstringop-truncation" } */
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109 strncpy ((char*)p->b, s, sizeof p->b); /* { dg-warning "\\\[-Wstringop-truncation" } */
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110 strncpy ((char*)p->c, s, sizeof p->c); /* { dg-bogus "\\\[-Wstringop-truncation" } */
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111 }
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112
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113 struct ConstVolatilePointers
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114 {
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115 const volatile char *p;
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116 const volatile signed char *q;
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117 const volatile unsigned char *r;
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118 };
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119
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120 void test_const_volatile_pointers (struct ConstVolatilePointers *p)
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121 {
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122 strncpy ((char*)p->p, S, sizeof S - 1); /* { dg-warning "\\\[-Wstringop-truncation" } */
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123 strncpy ((char*)p->q, S, sizeof S - 1); /* { dg-warning "\\\[-Wstringop-truncation" } */
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124 strncpy ((char*)p->r, S, sizeof S - 1); /* { dg-warning "\\\[-Wstringop-truncation" } */
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125 }
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126
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127 /* { dg-prune-output "-Wdiscarded-qualifiers" } */
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