gcc/testsuite/gcc.dg/tree-ssa/builtin-sprintf-warn-13.c

   1 /* { dg-do compile }
   2    { dg-options "-O2 -Wall -Wformat-overflow=1 -ftrack-macro-expansion=0" }
   3    { dg-require-effective-target int32plus } */
   4
   5 typedef __SIZE_TYPE__  size_t;
   6 typedef __WCHAR_TYPE__ wchar_t;
   7
   8 #define INT_MAX __INT_MAX__
   9 #define INT_MIN (-INT_MAX - 1)
  10
  11 /* When debugging, define LINE to the line number of the test case to exercise
  12    and avoid exercising any of the others.  The buffer and objsize macros
  13    below make use of LINE to avoid warnings for other lines.  */
  14 #ifndef LINE
  15 # define LINE 0
  16 #endif
  17
  18 void sink (char*, char*);
  19
  20 int dummy_sprintf (char*, const char*, ...);
  21
  22 char buffer [256];
  23 extern char *ptr;
  24
  25 static int int_range (int min, int max)
  26 {
  27   extern int int_value (void);
  28   int n = int_value ();
  29   return n < min || max < n ? min : n;
  30 }
  31
  32 /* Evaluate to an array of SIZE characters when non-negative, or to
  33    a pointer to an unknown object otherwise.  */
  34 #define buffer(size)                                    \
  35   ((0 <= size) ? buffer + sizeof buffer - (size) : ptr)
  36
  37 /* Helper to expand function to either __builtin_f or dummy_f to
  38    make debugging GCC easy.  */
  39 #define FUNC(f)                                                 \
  40   ((!LINE || LINE == __LINE__) ? __builtin_ ## f : dummy_ ## f)
  41
  42 /* Macro to verify that calls to __builtin_sprintf (i.e., with no size
  43    argument) issue diagnostics by correctly determining the size of
  44    the destination buffer.  */
  45 #define T(size, ...)                                            \
  46   (FUNC (sprintf) (buffer (size),  __VA_ARGS__),                \
  47    sink (buffer, ptr))
  48
  49 /* Return a signed integer in the range [MIN, MAX].  */
  50 #define R(min, max)  int_range (min, max)
  51
  52 /* Verify warnings and ranges for certain overflow.  */
  53 void test_min_overflow (int i)
  54 {
  55   T (0, "%#hho", i);            /* { dg-warning "between 1 and 4 bytes" } */
  56   T (0, "%#1hho", i);           /* { dg-warning "between 1 and 4 bytes" } */
  57   T (0, "%#2hho", i);           /* { dg-warning "between 2 and 4 bytes" } */
  58   T (0, "%#3hho", i);           /* { dg-warning "between 3 and 4 bytes" } */
  59   T (0, "%#4hho", i);           /* { dg-warning "writing 4 bytes" } */
  60   T (0, "%#hho", R (-1,  0));   /* { dg-warning "between 1 and 4 bytes" } */
  61   T (0, "%#1hho", R (-1,  0));  /* { dg-warning "between 1 and 4 bytes" } */
  62   T (0, "%#2hho", R (-1,  0));  /* { dg-warning "between 2 and 4 bytes" } */
  63   T (0, "%#3hho", R (-1,  0));  /* { dg-warning "between 3 and 4 bytes" } */
  64   T (0, "%#4hho", R (-1,  0));  /* { dg-warning "writing 4 bytes" } */
  65   T (0, "%#hho", R (-1,  1));   /* { dg-warning "between 1 and 4 bytes" } */
  66   T (0, "%#1hho", R (-1,  1));  /* { dg-warning "between 1 and 4 bytes" } */
  67   T (0, "%#2hho", R (-1,  1));  /* { dg-warning "between 2 and 4 bytes" } */
  68   T (0, "%#3hho", R (-1,  1));  /* { dg-warning "between 3 and 4 bytes" } */
  69   T (0, "%#4hho", R (-1,  1));  /* { dg-warning "writing 4 bytes" } */
  70   T (0, "%#hho", R ( 0,  1));   /* { dg-warning "between 1 and 2 bytes" } */
  71   T (0, "%#1hho", R ( 0,  1));  /* { dg-warning "between 1 and 2 bytes" } */
  72   T (0, "%#2hho", R ( 0,  1));  /* { dg-warning "writing 2 bytes" } */
  73   T (0, "%#3hho", R ( 0,  1));  /* { dg-warning "writing 3 bytes" } */
  74   T (0, "%#4hho", R ( 0,  1));  /* { dg-warning "writing 4 bytes" } */
  75   T (0, "%#hho", R ( 1,  2));   /* { dg-warning "writing 2 bytes" } */
  76   T (0, "%#1hho", R ( 1,  2));  /* { dg-warning "writing 2 bytes" } */
  77   T (0, "%#2hho", R ( 1,  2));  /* { dg-warning "writing 2 bytes" } */
  78   T (0, "%#3hho", R ( 1,  2));  /* { dg-warning "writing 3 bytes" } */
  79   T (0, "%#4hho", R ( 1,  2));  /* { dg-warning "writing 4 bytes" } */
  80
  81   T (0, "%#ho",  i);            /* { dg-warning "between 1 and 7 bytes" } */
  82   T (0, "%#.*ho",               /* { dg-warning "between 1 and 7 bytes" } */
  83      R (0, 2), i);
  84   T (0, "%#.*ho",               /* { dg-warning "between 1 and 7 bytes" } */
  85      R (1, 2), i);
  86   T (0, "%#.*ho",               /* { dg-warning "between 2 and 7 bytes" } */
  87      R (2, 3), i);
  88   T (0, "%#.*ho",               /* { dg-warning "between 3 and 7 bytes" } */
  89      R (3, 4), i);
  90   T (0, "%#.*ho",               /* { dg-warning "between 7 and 8 bytes" } */
  91      R (7, 8), i);
  92
  93   T (0, "%#ho",  R (-1,  0));   /* { dg-warning "between 1 and 7 bytes" } */
  94   T (0, "%#ho",  R (-1,  1));   /* { dg-warning "between 1 and 7 bytes" } */
  95   T (0, "%#ho",  R ( 0,  1));   /* { dg-warning "between 1 and 2 bytes" } */
  96   T (0, "%#ho",  R ( 1,  2));   /* { dg-warning "writing 2 bytes" } */
  97
  98   T (0, "%#o",   i);            /* { dg-warning "between 1 and 12 bytes" } */
  99   T (0, "%#o",   R (-1,  0));   /* { dg-warning "between 1 and 12 bytes" } */
 100   T (0, "%#o",   R (-1,  1));   /* { dg-warning "between 1 and 12 bytes" } */
 101   T (0, "%#o",   R ( 0,  1));   /* { dg-warning "between 1 and 2 bytes" } */
 102   T (0, "%#o",   R ( 1,  2));   /* { dg-warning "writing 2 bytes" } */
 103
 104   T (0, "%#hhx", i);            /* { dg-warning "between 1 and 4 bytes" } */
 105   T (0, "%#.*hhx",              /* { dg-warning "writing up to 4 bytes" } */
 106      R (0, 2), i);
 107   T (0, "%#.*hhx",              /* { dg-warning "between 1 and 4 bytes" } */
 108      R (1, 2), i);
 109   T (0, "%#.*hhx",              /* { dg-warning "between 2 and 5 bytes" } */
 110      R (2, 3), i);
 111   T (0, "%#.*hhx",              /* { dg-warning "between 3 and 6 bytes" } */
 112      R (3, 4), i);
 113
 114   T (0, "%#hhx", R (-1,  0));   /* { dg-warning "between 1 and 4 bytes" } */
 115   T (0, "%#hhx", R (-1,  1));   /* { dg-warning "between 1 and 4 bytes" } */
 116   T (0, "%#hhx", R ( 0,  1));   /* { dg-warning "between 1 and 3 bytes" } */
 117   T (0, "%#hhx", R ( 1,  2));   /* { dg-warning "writing 3 bytes" } */
 118
 119   T (0, "%#hx", i);             /* { dg-warning "between 1 and 6 bytes" } */
 120   T (0, "%#hx", R (-1,  0));    /* { dg-warning "between 1 and 6 bytes" } */
 121   T (0, "%#hx", R (-1,  1));    /* { dg-warning "between 1 and 6 bytes" } */
 122   T (0, "%#hx", R ( 0,  1));    /* { dg-warning "between 1 and 3 bytes" } */
 123   T (0, "%#hx", R ( 1,  2));    /* { dg-warning "writing 3 bytes" } */
 124
 125   T (0, "%#x",   i);            /* { dg-warning "between 1 and 10 bytes" } */
 126   T (0, "%#x",   R (-1,  0));   /* { dg-warning "between 1 and 10 bytes" } */
 127   T (0, "%#x",   R (-1,  1));   /* { dg-warning "between 1 and 10 bytes" } */
 128   T (0, "%#x",   R ( 0,  1));   /* { dg-warning "between 1 and 3 bytes" } */
 129   T (0, "%#x",   R ( 1,  2));   /* { dg-warning "writing 3 bytes" } */
 130 }
 131
 132 /* Verify warnings and ranges for likely overflow.  */
 133 void test_likely_overflow (int i)
 134 {
 135   T (2, "%#hho", i);          /* { dg-warning "may write a terminating nul" } */
 136   T (2, "%#1hho", i);         /* { dg-warning "may write a terminating nul" } */
 137   T (2, "%#2hho", i);         /* { dg-warning "writing a terminating nul" } */
 138   T (2, "%#3hho", i);         /* { dg-warning "between 3 and 4 bytes" } */
 139   T (2, "%#4hho", i);         /* { dg-warning "writing 4 bytes" } */
 140   T (2, "%#hho", R (-1,  0)); /* { dg-warning "may write a terminating nul" } */
 141   T (2, "%#1hho", R (-1,  0));/* { dg-warning "may write a terminating nul" } */
 142   T (2, "%#2hho", R (-1,  0));/* { dg-warning "writing a terminating nul" } */
 143   T (2, "%#3hho", R (-1,  0));/* { dg-warning "between 3 and 4 bytes" } */
 144   T (2, "%#4hho", R (-1,  0));/* { dg-warning "writing 4 bytes" } */
 145   T (2, "%#hho", R (-1,  1)); /* { dg-warning "may write a terminating nul" } */
 146   T (2, "%#1hho", R (-1,  1));/* { dg-warning "may write a terminating nul" } */
 147   T (2, "%#2hho", R (-1,  1));/* { dg-warning "writing a terminating nul" } */
 148   T (2, "%#3hho", R (-1,  1));/* { dg-warning "between 3 and 4 bytes" } */
 149   T (2, "%#4hho", R (-1,  1));/* { dg-warning "writing 4 bytes" } */
 150   T (2, "%#hho", R ( 0,  1)); /* { dg-warning "may write a terminating nul" } */
 151   T (2, "%#1hho", R ( 0,  1));/* { dg-warning "may write a terminating nul" } */
 152   T (2, "%#2hho", R ( 0,  1));/* { dg-warning "writing a terminating nul" } */
 153   T (2, "%#3hho", R ( 0,  1));/* { dg-warning "writing 3 bytes" } */
 154   T (2, "%#4hho", R ( 0,  1));/* { dg-warning "writing 4 bytes" } */
 155   T (2, "%#hho", R ( 1,  2)); /* { dg-warning "writing a terminating nul" } */
 156   T (2, "%#1hho", R ( 1,  2));/* { dg-warning "writing a terminating nul" } */
 157   T (2, "%#2hho", R ( 1,  2));/* { dg-warning "writing a terminating nul" } */
 158   T (2, "%#3hho", R ( 1,  2));/* { dg-warning "writing 3 bytes" } */
 159   T (2, "%#4hho", R ( 1,  2));/* { dg-warning "writing 4 bytes" } */
 160
 161   T (2, "%#ho",  i);          /* { dg-warning "may write a terminating nul" } */
 162   T (2, "%#ho",  R (-1,  0)); /* { dg-warning "may write a terminating nul" } */
 163   T (2, "%#ho",  R (-1,  1)); /* { dg-warning "may write a terminating nul" } */
 164   T (2, "%#ho",  R ( 0,  1)); /* { dg-warning "may write a terminating nul" } */
 165   T (2, "%#ho",  R ( 1,  2)); /* { dg-warning "writing a terminating nul" } */
 166
 167   T (2, "%#o",   i);          /* { dg-warning "may write a terminating nul" } */
 168   T (2, "%#o",   R (-1,  0)); /* { dg-warning "may write a terminating nul" } */
 169   T (2, "%#o",   R (-1,  1)); /* { dg-warning "may write a terminating nul" } */
 170   T (2, "%#o",   R ( 0,  1)); /* { dg-warning "may write a terminating nul" } */
 171   T (2, "%#o",   R ( 1,  2)); /* { dg-warning "writing a terminating nul" } */
 172
 173   T (2, "%#hhx", i);          /* { dg-warning "between 1 and 4 bytes" } */
 174   T (2, "%#1hhx", i);         /* { dg-warning "between 1 and 4 bytes" } */
 175   T (2, "%#2hhx", i);         /* { dg-warning "between 2 and 4 bytes" } */
 176   T (2, "%#3hhx", i);         /* { dg-warning "between 3 and 4 bytes" } */
 177   T (2, "%#4hhx", i);         /* { dg-warning "writing 4 bytes" } */
 178   T (2, "%#1hhx", R (-1,  0));/* { dg-warning "between 1 and 4 bytes" } */
 179   T (2, "%#2hhx", R (-1,  0));/* { dg-warning "between 2 and 4 bytes" } */
 180   T (2, "%#3hhx", R (-1,  0));/* { dg-warning "between 3 and 4 bytes" } */
 181   T (2, "%#4hhx", R (-1,  0));/* { dg-warning "writing 4 bytes" } */
 182   T (2, "%#hhx", R (-1,  0)); /* { dg-warning "between 1 and 4 bytes" } */
 183   T (2, "%#1hhx", R (-1,  0));/* { dg-warning "between 1 and 4 bytes" } */
 184   T (2, "%#2hhx", R (-1,  0));/* { dg-warning "between 2 and 4 bytes" } */
 185   T (2, "%#3hhx", R (-1,  0));/* { dg-warning "between 3 and 4 bytes" } */
 186   T (2, "%#4hhx", R (-1,  0));/* { dg-warning "writing 4 bytes" } */
 187   T (2, "%#hhx", R (-1,  1)); /* { dg-warning "between 1 and 4 bytes" } */
 188   T (2, "%#1hhx", R (-1,  1));/* { dg-warning "between 1 and 4 bytes" } */
 189   T (2, "%#2hhx", R (-1,  1));/* { dg-warning "between 2 and 4 bytes" } */
 190   T (2, "%#3hhx", R (-1,  1));/* { dg-warning "between 3 and 4 bytes" } */
 191   T (2, "%#4hhx", R (-1,  1));/* { dg-warning "writing 4 bytes" } */
 192   T (2, "%#hhx", R ( 0,  1)); /* { dg-warning "between 1 and 3 bytes" } */
 193   T (2, "%#1hhx", R ( 0,  1));/* { dg-warning "between 1 and 3 bytes" } */
 194   T (2, "%#2hhx", R ( 0,  1));/* { dg-warning "between 2 and 3 bytes" } */
 195   T (2, "%#3hhx", R ( 0,  1));/* { dg-warning "writing 3 bytes" } */
 196   T (2, "%#4hhx", R ( 0,  1));/* { dg-warning "writing 4 bytes" } */
 197   T (2, "%#hhx", R ( 1,  2)); /* { dg-warning "writing 3 bytes" } */
 198   T (2, "%#1hhx", R ( 1,  2));/* { dg-warning "writing 3 bytes" } */
 199   T (2, "%#2hhx", R ( 1,  2));/* { dg-warning "writing 3 bytes" } */
 200   T (2, "%#3hhx", R ( 1,  2));/* { dg-warning "writing 3 bytes" } */
 201   T (2, "%#4hhx", R ( 1,  2));/* { dg-warning "writing 4 bytes" } */
 202
 203   T (2, "%#hx", i);           /* { dg-warning "between 1 and 6 bytes" } */
 204   T (2, "%#hx", R (-1,  0));  /* { dg-warning "between 1 and 6 bytes" } */
 205   T (2, "%#hx", R (-1,  1));  /* { dg-warning "between 1 and 6 bytes" } */
 206   T (2, "%#hx", R ( 0,  1));  /* { dg-warning "between 1 and 3 bytes" } */
 207   T (2, "%#hx", R ( 1,  2));  /* { dg-warning "writing 3 bytes" } */
 208
 209   T (2, "%#x",   i);          /* { dg-warning "between 1 and 10 bytes" } */
 210   T (2, "%#x",   R (-1,  0)); /* { dg-warning "between 1 and 10 bytes" } */
 211   T (2, "%#x",   R (-1,  1)); /* { dg-warning "between 1 and 10 bytes" } */
 212   T (2, "%#x",   R ( 0,  1)); /* { dg-warning "between 1 and 3 bytes" } */
 213   T (2, "%#x",   R ( 1,  2)); /* { dg-warning "writing 3 bytes" } */
 214 }
 215
 216 /* Verify warnings likely overflow due to the terminating nul.  */
 217 void test_likely_nul_overflow (int i)
 218 {
 219   T (3, "%#hho", i);
 220   T (3, "%#hho", R (-1,  0));
 221   T (3, "%#hho", R (-1,  1));
 222   T (3, "%#hho", R ( 0,  1));
 223   T (3, "%#hho", R ( 1,  2));
 224
 225   T (3, "%#ho",  i);
 226   T (3, "%#ho",  R (-1,  0));
 227   T (3, "%#ho",  R (-1,  1));
 228   T (3, "%#ho",  R ( 0,  1));
 229   T (3, "%#ho",  R ( 1,  2));
 230
 231   T (3, "%#o",   i);
 232   T (3, "%#o",   R (-1,  0));
 233   T (3, "%#o",   R (-1,  1));
 234   T (3, "%#o",   R ( 0,  1));
 235   T (3, "%#o",   R ( 1,  2));
 236
 237   T (3, "%#hhx", i);          /* { dg-warning "may write a terminating nul" } */
 238   T (3, "%#hhx", R (-1,  0)); /* { dg-warning "may write a terminating nul" } */
 239   T (3, "%#hhx", R (-1,  1)); /* { dg-warning "may write a terminating nul" } */
 240   T (3, "%#hhx", R ( 0,  1)); /* { dg-warning "may write a terminating nul" } */
 241   T (3, "%#hhx", R ( 1,  2)); /* { dg-warning "writing a terminating nul" } */
 242
 243   T (3, "%#hx", i);           /* { dg-warning "may write a terminating nul" } */
 244   T (3, "%#hx", R (-1,  0));  /* { dg-warning "may write a terminating nul" } */
 245   T (3, "%#hx", R (-1,  1));  /* { dg-warning "may write a terminating nul" } */
 246   T (3, "%#hx", R ( 0,  1));  /* { dg-warning "may write a terminating nul" } */
 247   T (3, "%#hx", R ( 1,  2));  /* { dg-warning "writing a terminating nul" } */
 248
 249   T (3, "%#x",   i);          /* { dg-warning "may write a terminating nul" } */
 250   T (3, "%#x",   R (-1,  0)); /* { dg-warning "may write a terminating nul" } */
 251   T (3, "%#x",   R (-1,  1)); /* { dg-warning "may write a terminating nul" } */
 252   T (3, "%#x",   R ( 0,  1)); /* { dg-warning "may write a terminating nul" } */
 253   T (3, "%#x",   R ( 1,  2)); /* { dg-warning "writing a terminating nul" } */
 254 }