gcc/testsuite/gcc.dg/Warray-bounds-31.c

   1 /* PR tree-optimization/83776: missing -Warray-bounds indexing past the end
   2    of a string literal
   3    Test to exercise detection of out-of-bounds indices into narrow string
   4    literals.
   5    { dg-do compile }
   6    { dg-options "-O2 -Warray-bounds -ftrack-macro-expansion=0" } */
   7
   8 #include "range.h"
   9
  10 #define MAX DIFF_MAX
  11 #define MIN DIFF_MIN
  12
  13 #define S1 "1"
  14 #define S3 "123"
  15 #define S7 "1234567"
  16 #define S8 "12345678"
  17 #define S9 "123456789"
  18
  19 void sink (int, ...);
  20
  21 #define T(expr)   sink (0, expr)
  22
  23
  24 void narrow_direct_cst (void)
  25 {
  26   T (S1[MIN]);                /* { dg-warning "array subscript -\[0-9\]+ is below array bounds of .char\\\[2]" "" { xfail *-*-* } } */
  27   T (S1[-1]);                 /* { dg-warning "array subscript -1 is below array bounds of .char\\\[2]" } */
  28   T (S1[0]);
  29   T (S1[1]);
  30   T (S1[2]);                  /* { dg-warning "array subscript 2 is above array bounds of .char\\\[2]" } */
  31   T (S1[MAX]);                /* { dg-warning "array subscript \[0-9\]+ is above array bounds of .char\\\[2]" } */
  32
  33   T (&S1[MIN]);               /* { dg-warning "array subscript -\[0-9\]+ is below array bounds of .char\\\[2]" } */
  34   T (&S1[-1]);                /* { dg-warning "array subscript -1 is below array bounds of .char\\\[2]" } */
  35   T (&S1[0]);
  36   T (&S1[2]);
  37   T (&S1[3]);                 /* { dg-warning "array subscript 3 is above array bounds of .char\\\[2]" } */
  38   T (&S1[MAX]);               /* { dg-warning "array subscript \[0-9\]+ is above array bounds of .char\\\[2]" } */
  39
  40   T (S9[MIN]);                /* { dg-warning "array subscript -\[0-9\]+ is below array bounds of .char\\\[10]" "" { xfail *-*-* } } */
  41   T (S9[-1]);                 /* { dg-warning "array subscript -1 is below array bounds of .char\\\[10]" } */
  42   T (S9[9]);
  43   T (S9[10]);                 /* { dg-warning "array subscript 10 is above array bounds of .char\\\[10]" } */
  44   T (S9[11]);                 /* { dg-warning "array subscript 11 is above array bounds of .char\\\[10]" } */
  45   T (S9[MAX]);                /* { dg-warning "array subscript \[0-9\]+ is above array bounds of .char\\\[10]" } */
  46
  47   T (&S9[MIN]);               /* { dg-warning "array subscript -\[0-9\]+ is below array bounds of .char\\\[10]" } */
  48   T (&S9[-1]);                /* { dg-warning "array subscript -1 is below array bounds of .char\\\[10]" } */
  49   T (&S9[9]);
  50   T (&S9[10]);
  51   T (&S9[11]);                 /* { dg-warning "array subscript 11 is above array bounds of .char\\\[10]" } */
  52   T (&S9[MAX]);               /* { dg-warning "array subscript \[0-9\]+ is above array bounds of .char\\\[10]" } */
  53 }
  54
  55 void narrow_ptr_deref_cst (void)
  56 {
  57   const char *p = S8 + 9;
  58
  59   T (*(p + MIN));             /* { dg-warning "array subscript -\[0-9\]+ is outside array bounds of .char\\\[9]." } */
  60   T (*(p - 10));              /* { dg-warning "array subscript -1 is outside array bounds of .char\\\[9]." } */
  61   T (*(p - 9));
  62   T (*(p - 1));
  63   T (*p);                     /* { dg-warning "array subscript 9 is outside array bounds of .char\\\[9]." } */
  64   T (*(p + 1));               /* { dg-warning "array subscript 10 is outside array bounds of .char\\\[9]." } */
  65   T (*(p + 2));               /* { dg-warning "array subscript 11 is outside array bounds of .char\\\[9]." } */
  66 }
  67
  68 void narrow_ptr_index_cst (void)
  69 {
  70   const char *p = S7;
  71
  72   T (p[MIN + 1]);             /* { dg-warning "array subscript -\[0-9\]+ is outside array bounds of .char\\\[8]." "bug 84047" { xfail *-*-* } } */
  73   T (p[-1]);                  /* { dg-warning "array subscript -1 is outside array bounds of .char\\\[8]." } */
  74   T (p[0]);
  75   T (p[1]);
  76   T (p[8]);                   /* { dg-warning "array subscript 8 is outside array bounds of .char\\\[8]." } */
  77   T (p[99]);                  /* { dg-warning "array subscript 99 is outside array bounds of .char\\\[8]." } */
  78   T (p[MAX]);                 /* { dg-warning "array subscript \[0-9\]+ is outside array bounds of .char\\\[8]." } */
  79
  80   T (&p[MIN + 1]);            /* { dg-warning "array subscript -\[0-9\]+ is \(below|outside\) array bounds of .char\\\[8]." } */
  81   T (&p[-1]);                 /* { dg-warning "array subscript -1 is \(below|outside\) array bounds of .char\\\[8]." } */
  82   T (&p[0]);
  83   T (&p[1]);
  84   T (&p[8]);
  85   T (&p[9]);                  /* { dg-warning "array subscript 9 is \(above|outside\) array bounds of .char\\\[8]." } */
  86   T (&p[99]);                 /* { dg-warning "array subscript 99 is \(above|outside\) array bounds of .char\\\[8]." } */
  87   T (&p[MAX]);                /* { dg-warning "array subscript \[0-9\]+ is \(above|outside\) array bounds of .char\\\[8]." } */
  88
  89   const char *q = S8 + 4;
  90   T (q[MIN + 1]);             /* { dg-warning "array subscript -?\[0-9\]+ is outside array bounds of .char\\\[9]." "bug 84047" { xfail *-*-* } } */
  91   T (q[-5]);                  /* { dg-warning "array subscript -1 is outside array bounds of .char\\\[9]." } */
  92   T (q[-4]);
  93   T (q[0]);
  94   T (q[1]);
  95   T (q[3]);
  96   T (q[4]);
  97   T (q[5]);                   /* { dg-warning "array subscript 9 is outside array bounds of .char\\\[9]." } */
  98   T (q[99]);                  /* { dg-warning "array subscript 103 is outside array bounds of .char\\\[9]." } */
  99   T (q[MAX - 4]);             /* { dg-warning "array subscript \[0-9\]+ is outside array bounds of .char\\\[9]." } */
 100   T (q[MAX - 3]);             /* { dg-warning "array subscript \[0-9\]+ is outside array bounds of .char\\\[9]." "bug 84047" { xfail *-*-* } } */
 101
 102   T (&q[MIN + 1]);            /* { dg-warning "array subscript -?\[0-9\]+ is \(below|outside\) array bounds of .char\\\[9]." } */
 103   T (&q[-5]);                 /* { dg-warning "array subscript -1 is \(below|outside\) array bounds of .char\\\[9]." } */
 104   T (&q[-4]);
 105   T (&q[0]);
 106   T (&q[1]);
 107   T (&q[5]);
 108   T (&q[6]);                  /* { dg-warning "array subscript 10 is \(above|outside\) array bounds of .char\\\[9]." } */
 109   T (&q[99]);                 /* { dg-warning "array subscript 103 is \(above|outside\) array bounds of .char\\\[9]." } */
 110   T (&q[MAX - 4]);            /* { dg-warning "array subscript \[0-9\]+ is \(above|outside\) array bounds of .char\\\[9]." } */
 111   T (&q[MAX - 3]);            /* { dg-warning "array subscript -?\[0-9\]+ is \(below|outside\) array bounds of .char\\\[9]." } */
 112 }
 113
 114
 115 void narrow_direct_range (ptrdiff_t i, size_t j)
 116 {
 117   T (S3[i]);
 118   T (S9[j]);
 119
 120   T (S3[SR (MIN, -1)]);       /* { dg-warning "array subscript -1 is below array bounds of .char\\\[4]" } */
 121   T (S3[SR (MIN, 0)]);
 122   T (S3[SR (-2, -1)]);        /* { dg-warning "array subscript -1 is below array bounds of .char\\\[4]" } */
 123   T (S3[SR (1, 2)]);
 124   T (S3[SR (1, 999)]);
 125   T (S3[SR (2, 999)]);
 126   T (S3[SR (3, 999)]);
 127   T (S3[SR (4, 999)]);       /* { dg-warning "array subscript 4 is above array bounds of .char\\\[4]" } */
 128
 129   T (&S3[SR (MIN, -1)]);      /* { dg-warning "array subscript -1 is below array bounds of .char\\\[4]" } */
 130   T (&S3[SR (MIN, 0)]);
 131   T (&S3[SR (-2, -1)]);       /* { dg-warning "array subscript -1 is below array bounds of .char\\\[4]" } */
 132   T (&S3[SR (1, 2)]);
 133   T (&S3[SR (1, 999)]);
 134   T (&S3[SR (2, 999)]);
 135   T (&S3[SR (4, 999)]);
 136   T (&S3[SR (5, 999)]);      /* { dg-warning "array subscript 5 is above array bounds of .char\\\[4]" } */
 137
 138   T (S9[SR (MIN, -9)]);       /* { dg-warning "array subscript -9 is below array bounds of .char\\\[10]" } */
 139   T (S9[SR (MIN, -1)]);       /* { dg-warning "array subscript -1 is below array bounds of .char\\\[10]" } */
 140   T (S9[SR (MIN, 0)]);
 141   T (S9[SR (-2, -1)]);        /* { dg-warning "array subscript -1 is below array bounds of .char\\\[10]" } */
 142   T (S9[SR (1, 2)]);
 143   T (S9[SR (1, 9)]);
 144   T (S9[SR (1, 999)]);
 145   T (S9[SR (9, 999)]);
 146   T (S9[SR (10, 999)]);       /* { dg-warning "array subscript 10 is above array bounds of .char\\\[10]" } */
 147   T (S9[SR (99, MAX)]);       /* { dg-warning "array subscript 99 is above array bounds of .char\\\[10]" } */
 148 }
 149
 150
 151 void narrow_ptr_deref_range (ptrdiff_t i, size_t j)
 152 {
 153   const char *p;
 154
 155   p = S1 + i;
 156   T (*p);
 157
 158   p = S1 + j;
 159   T (*p);
 160
 161   p = S1 + SR (-999, 999);
 162   T (*p);
 163
 164   p = S1 + SR (-1, 1);
 165   T (*p);
 166
 167   p = S1 + SR (-1, 0);
 168   T (*p);
 169
 170   p = S1 + SR (0, 1);
 171   T (*p);
 172
 173   p = S1 + SR (1, 2);
 174   T (*p);
 175
 176   p = S1 + SR (2, 3);
 177   T (*p);                     /* { dg-warning "array subscript \\\[2, 3] is outside array bounds of .char\\\[2]." } */
 178
 179   p = S1 + SR (9, 99);
 180   T (*p);                     /* { dg-warning "array subscript \\\[9, 99] is outside array bounds of .char\\\[2]." } */
 181
 182   p = S8 + SR (-999, 999);
 183   T (*p);
 184
 185   p = S8 + SR (-9, -1);
 186   T (*p);                     /* { dg-warning "array subscript \\\[-9, -1] is outside array bounds of .char\\\[9]." } */
 187
 188   p = S8 + SR (-9, 0);
 189   T (*p);
 190
 191   p = S8 + SR (-9, 9);
 192   T (*p);
 193
 194   p = S8 + SR (-9, 123);
 195   T (*p);
 196
 197   p = S8 + SR (8, 123);
 198   T (*p);
 199
 200   p = S8 + SR (9, 123);
 201   T (*p);                     /* { dg-warning "array subscript \\\[9, 123] is outside array bounds of .char\\\[9]." } */
 202
 203   {
 204     const char *p1 = S3 + i;
 205     const char *p2 = p1 + i;
 206     const char *p3 = p2 + i;
 207     const char *p4 = p3 + i;
 208     const char *p5 = p4 + i;
 209
 210     T (*p1);
 211     T (*p2);
 212     T (*p3);
 213     T (*p4);
 214     T (*p5);
 215   }
 216
 217   {
 218     i = SR (1, 2);
 219
 220     const char *p1 = S3 +  SR (1, DIFF_MAX - 1);
 221     const char *p2 = p1 + i;
 222     const char *p3 = p2 + i;
 223     const char *p4 = p3 + i;
 224     const char *p5 = p4 + i;
 225
 226     T (*p1);
 227     T (*p2);
 228     T (*p3);
 229     T (*p4);                  /* { dg-warning "array subscript \\\[4, \[0-9\]+] is outside array bounds of .char\\\[4]." } */
 230     T (*p5);                  /* { dg-warning "array subscript \\\[5, \[0-9\]+] is outside array bounds of .char\\\[4]." } */
 231   }
 232 }
 233
 234
 235 void narrow_ptr_index_range (void)
 236 {
 237   const char *p;
 238
 239   p = S7;
 240   T (p[SR (-9, -1)]);         /* { dg-warning "array subscript \\\[-9, -1] is outside array bounds of .char\\\[8]." } */
 241   T (p[SR (-8, 0)]);
 242   T (p[SR (0, MAX)]);
 243   T (p[SR (1, 9)]);
 244   T (p[SR (8, 9)]);           /* { dg-warning "array subscript \\\[8, 9] is outside array bounds of .char\\\[8]." } */
 245
 246   p = S7 + SR (4, 6);
 247   T (p[5]);                   /* { dg-warning "array subscript \\\[9, 11] is outside array bounds of .char\\\[8]." } */
 248 }