gcc/testsuite/gcc.dg/builtins-nonnull.c

   1 /* PR c/17308 - nonnull attribute not as useful as it could be
   2    PR c/78673 - sprintf missing attribute nonnull on destination argument
   3    { dg-do "compile" }
   4    { dg-additional-options "-O2 -Wnonnull -ftrack-macro-expansion=0 -std=c99" } */
   5
   6 #define va_list __builtin_va_list
   7
   8 typedef struct FILE FILE;
   9
  10 static char* null (void)
  11 {
  12   return 0;
  13 }
  14
  15 void sink (int, ...);
  16 #define T(arg) sink (0, arg)
  17
  18
  19 #define bzero    __builtin_bzero
  20 #define memcpy   __builtin_memcpy
  21 #define memmove  __builtin_memmove
  22 #define mempcpy  __builtin_mempcpy
  23 #define memset   __builtin_memset
  24
  25 void test_memfuncs (void *s, unsigned n)
  26 {
  27   /* Bzero is not declared attribute nonnull (maybe it should be?)
  28      but it's transformed into a call to memset() which is.  */
  29   bzero (null (), n);             /* { dg-warning "argument 1 null where non-null expected" } */
  30
  31   T (memcpy (null (), s, n));     /* { dg-warning "argument 1 null where non-null expected" } */
  32   T (memcpy (s, null (), n));     /* { dg-warning "argument 2 null where non-null expected" } */
  33
  34   T (memmove (null (), s, n));    /* { dg-warning "argument 1 null where non-null expected" } */
  35   T (memmove (s, null (), n));    /* { dg-warning "argument 2 null where non-null expected" } */
  36
  37   T (mempcpy (null (), s, n));    /* { dg-warning "argument 1 null where non-null expected" } */
  38   T (mempcpy (s, null (), n));    /* { dg-warning "argument 2 null where non-null expected" } */
  39
  40   T (memset (null (), 0, n));     /* { dg-warning "argument 1 null where non-null expected" } */
  41 }
  42
  43 #undef memcpy
  44 #undef memmove
  45 #undef mempcpy
  46 #undef memset
  47 #define memcpy(d, s, n)   __builtin___memcpy_chk (d, s, n, n)
  48 #define memmove(d, s, n)  __builtin___memmove_chk (d, s, n, n)
  49 #define mempcpy(d, s, n)  __builtin___mempcpy_chk (d, s, n, n)
  50 #define memset(d, x, n)   __builtin___memset_chk (d, x, n, n)
  51
  52 void test_memfuncs_chk (void *s, unsigned n)
  53 {
  54   T (memcpy (null (), s, n));     /* { dg-warning "argument 1 null where non-null expected" } */
  55   T (memcpy (s, null (), n));     /* { dg-warning "argument 2 null where non-null expected" } */
  56
  57   T (memmove (null (), s, n));    /* { dg-warning "argument 1 null where non-null expected" } */
  58   T (memmove (s, null (), n));    /* { dg-warning "argument 2 null where non-null expected" } */
  59
  60   T (mempcpy (null (), s, n));    /* { dg-warning "argument 1 null where non-null expected" } */
  61   T (mempcpy (s, null (), n));    /* { dg-warning "argument 2 null where non-null expected" } */
  62
  63   T (memset (null (), 0, n));     /* { dg-warning "argument 1 null where non-null expected" } */
  64 }
  65
  66
  67 #define strcat   __builtin_strcat
  68 #define strchr   __builtin_strchr
  69 #define stpcpy   __builtin_stpcpy
  70 #define stpncpy  __builtin_stpncpy
  71 #define strcpy   __builtin_strcpy
  72 #define strncpy  __builtin_strncpy
  73 #define strlen   __builtin_strlen
  74 #define strncat  __builtin_strncat
  75 #define strstr   __builtin_strstr
  76
  77 void test_strfuncs (char *s, unsigned n)
  78 {
  79   T (strcat (null (), s));        /* { dg-warning "argument 1 null where non-null expected" } */
  80   T (strcat (s, null ()));        /* { dg-warning "argument 2 null where non-null expected" } */
  81
  82   T (strchr (null (), 'x'));      /* { dg-warning "argument 1 null where non-null expected" } */
  83
  84   T (stpcpy (null (), s));        /* { dg-warning "argument 1 null where non-null expected" } */
  85   T (stpcpy (s, null ()));        /* { dg-warning "argument 2 null where non-null expected" } */
  86
  87   T (stpncpy (null (), s, n));    /* { dg-warning "argument 1 null where non-null expected" } */
  88   T (stpncpy (s, null (), n));    /* { dg-warning "argument 2 null where non-null expected" } */
  89
  90   T (strcpy (null (), s));        /* { dg-warning "argument 1 null where non-null expected" } */
  91   T (strcpy (s, null ()));        /* { dg-warning "argument 2 null where non-null expected" } */
  92
  93   T (strncpy (null (), s, n));    /* { dg-warning "argument 1 null where non-null expected" } */
  94   T (strncpy (s, null (), n));    /* { dg-warning "argument 2 null where non-null expected" } */
  95
  96   T (strlen (null ()));           /* { dg-warning "argument 1 null where non-null expected" } */
  97
  98   T (strncat (s, null (), n));    /* { dg-warning "argument 2 null where non-null expected" } */
  99   T (strncat (null (), s, n));    /* { dg-warning "argument 1 null where non-null expected" } */
 100
 101   T (strstr (null (), s));        /* { dg-warning "argument 1 null where non-null expected" } */
 102   T (strstr (s, null ()));        /* { dg-warning "argument 2 null where non-null expected" } */
 103 }
 104
 105
 106 #undef strcat
 107 #undef stpcpy
 108 #undef stpncpy
 109 #undef strcpy
 110 #undef strncpy
 111 #undef strncat
 112
 113 #define strcat(d, s)      __builtin___strcat_chk (d, s, n)
 114 #define stpcpy(d, s)      __builtin___stpcpy_chk (d, s, n)
 115 #define stpncpy(d, s, n)  __builtin___stpncpy_chk (d, s, n, n)
 116 #define strcpy(d, s)      __builtin___strcpy_chk (d, s, n)
 117 #define strncpy(d, s, n)  __builtin___strncpy_chk (d, s, n, n)
 118 #define strncat(d, s, n)  __builtin___strncat_chk (d, s, n, n)
 119
 120 void test_strfuncs_chk (char *s, unsigned n)
 121 {
 122   T (strcat (null (), s));        /* { dg-warning "argument 1 null where non-null expected" } */
 123   T (strcat (s, null ()));        /* { dg-warning "argument 2 null where non-null expected" } */
 124
 125   T (strchr (null (), 'x'));      /* { dg-warning "argument 1 null where non-null expected" } */
 126
 127   T (stpcpy (null (), s));        /* { dg-warning "argument 1 null where non-null expected" } */
 128   T (stpcpy (s, null ()));        /* { dg-warning "argument 2 null where non-null expected" } */
 129
 130   T (stpncpy (null (), s, n));    /* { dg-warning "argument 1 null where non-null expected" } */
 131   T (stpncpy (s, null (), n));    /* { dg-warning "argument 2 null where non-null expected" } */
 132
 133   T (strcpy (null (), s));        /* { dg-warning "argument 1 null where non-null expected" } */
 134   T (strcpy (s, null ()));        /* { dg-warning "argument 2 null where non-null expected" } */
 135
 136   T (strncpy (null (), s, n));    /* { dg-warning "argument 1 null where non-null expected" } */
 137   T (strncpy (s, null (), n));    /* { dg-warning "argument 2 null where non-null expected" } */
 138
 139   T (strncat (s, null (), n));    /* { dg-warning "argument 2 null where non-null expected" } */
 140   T (strncat (null (), s, n));    /* { dg-warning "argument 1 null where non-null expected" } */
 141 }
 142
 143
 144 #define fprintf             __builtin_fprintf
 145 #define fprintf_unlocked    __builtin_fprintf_unlocked
 146 #define vfprintf            __builtin_vfprintf
 147 #define printf              __builtin_printf
 148 #define printf_unlocked     __builtin_printf_unlocked
 149 #define vprintf             __builtin_vprintf
 150 #define sprintf             __builtin_sprintf
 151 #define snprintf            __builtin_snprintf
 152 #define vsprintf            __builtin_vsprintf
 153 #define vsnprintf           __builtin_vsnprintf
 154
 155 void test_stdio_funcs (FILE *f, char *d, unsigned n, va_list va)
 156 {
 157   T (fprintf (null (), "%i", 0)); /* { dg-warning "argument 1 null where non-null expected" } */
 158   T (fprintf (f, null ()));       /* { dg-warning "argument 2 null where non-null expected" } */
 159
 160   T (fprintf_unlocked (null (), "%i", 0)); /* { dg-warning "argument 1 null where non-null expected" } */
 161   T (fprintf_unlocked (f, null ()));       /* { dg-warning "argument 2 null where non-null expected" } */
 162
 163   T (vfprintf (null (), "%i", va));/* { dg-warning "argument 1 null where non-null expected" } */
 164   T (vfprintf (f, null (), va));   /* { dg-warning "argument 2 null where non-null expected" } */
 165
 166   T (vprintf (null (), va));      /* { dg-warning "argument 1 null where non-null expected" } */
 167
 168   T (printf (null ()));           /* { dg-warning "argument 1 null where non-null expected" } */
 169   T (printf_unlocked (null ()));  /* { dg-warning "argument 1 null where non-null expected" } */
 170
 171   T (vprintf (null (), va));      /* { dg-warning "argument 1 null where non-null expected" } */
 172
 173   T (sprintf (null (), "%i", 0)); /* { dg-warning "argument 1 null where non-null expected" } */
 174   T (sprintf (d, null ()));       /* { dg-warning "argument 2 null where non-null expected" } */
 175
 176   T (snprintf (null (), n, "%i", 0));
 177   T (snprintf (d, n, null ()));   /* { dg-warning "argument 3 null where non-null expected" } */
 178
 179   T (vsprintf (null (), "%i", va)); /* { dg-warning "argument 1 null where non-null expected" } */
 180   T (vsprintf (d, null (), va));   /* { dg-warning "argument 2 null where non-null expected" } */
 181
 182   T (vsnprintf (null (), n, "%i", va));
 183   T (vsnprintf (d, n, null (), va));  /* { dg-warning "argument 3 null where non-null expected" } */
 184 }
 185
 186 #undef fprintf
 187 #undef fprintf_unlocked
 188 #undef vfprintf
 189 #undef printf
 190 #undef printf_unlocked
 191 #undef vprintf
 192 #undef sprintf
 193 #undef snprintf
 194 #undef vsprintf
 195 #undef vsnprintf
 196
 197 #define fprintf(f, fmt, ...)                            \
 198   __builtin___fprintf_chk (f, 0, fmt, __VA_ARGS__)
 199 #define vfprintf(f, fmt, va)                    \
 200   __builtin___vfprintf_chk (f, 0, fmt, va)
 201 #define printf(fmt, ...)                        \
 202   __builtin___printf_chk (0, fmt, __VA_ARGS__)
 203 #define vprintf(fmt, va)                        \
 204   __builtin___vprintf_chk (0, fmt, va)
 205 #define sprintf(d, fmt, ... )                           \
 206   __builtin___sprintf_chk (d, 0, n, fmt, __VA_ARGS__)
 207 #define snprintf(d, n, fmt, ...)                        \
 208   __builtin___snprintf_chk (d, n, 0, n,  fmt, __VA_ARGS__)
 209 #define vsprintf(d, fmt, va)                    \
 210   __builtin___vsprintf_chk (d, 0, n, fmt, va)
 211 #define vsnprintf(d, n, fmt, va)                        \
 212   __builtin___vsnprintf_chk (d, n, 0, n, fmt, va)
 213
 214 void test_stdio_funcs_chk (FILE *f, char *d, const char *fmt,
 215                            unsigned n, va_list va)
 216 {
 217   T (fprintf (null (), "%i", 0)); /* { dg-warning "argument 1 null where non-null expected" } */
 218   T (fprintf (f, null (), 0));    /* { dg-warning "argument 3 null where non-null expected" } */
 219
 220   T (vfprintf (null (), "%i", va));/* { dg-warning "argument 1 null where non-null expected" } */
 221   T (vfprintf (f, null (), va));   /* { dg-warning "argument 3 null where non-null expected" } */
 222
 223   T (vprintf (null (), va));      /* { dg-warning "argument 2 null where non-null expected" } */
 224
 225   T (printf (null (), 0));        /* { dg-warning "argument 2 null where non-null expected" } */
 226
 227   T (vprintf (null (), va));      /* { dg-warning "argument 2 null where non-null expected" } */
 228
 229   T (sprintf (null (), "%i", 0)); /* { dg-warning "argument 1 null where non-null expected" } */
 230   T (sprintf (d, null (), 0));    /* { dg-warning "argument 4 null where non-null expected" } */
 231
 232   T (snprintf (null (), n, "%i", 0));
 233   T (snprintf (d, n, null (), 0));  /* { dg-warning "argument 5 null where non-null expected" } */
 234
 235   T (vsprintf (null (), "%i", va)); /* { dg-warning "argument 1 null where non-null expected" } */
 236   T (vsprintf (d, null (), va));   /* { dg-warning "argument 4 null where non-null expected" } */
 237
 238   T (vsnprintf (null (), n, "%i", va));
 239   T (vsnprintf (d, n, null (), va));  /* { dg-warning "argument 5 null where non-null expected" } */
 240 }