gcc/testsuite/c-c++-common/asan/pointer-compare-3.c

   1 /* { dg-do run } */
   2 /* { dg-set-target-env-var ASAN_OPTIONS "detect_invalid_pointer_pairs=1:halt_on_error=1" } */
   3 /* { dg-options "-fsanitize=address,pointer-compare" } */
   4
   5 int foo(char *p, char *q) {
   6   return p <= q;
   7 }
   8
   9 char global[8192] = {};
  10 char small_global[7] = {};
  11
  12 int main() {
  13   // Heap allocated memory.
  14   char *p = (char *)__builtin_malloc(42);
  15   int r = foo(p, 0);
  16   __builtin_free(p);
  17
  18   p = (char *)__builtin_malloc(1024);
  19   foo(0, p);
  20   __builtin_free(p);
  21
  22   p = (char *)__builtin_malloc(4096);
  23   foo(p, 0);
  24   __builtin_free(p);
  25
  26   // Global variable.
  27   foo(&global[0], 0);
  28   foo(&global[1000], 0);
  29
  30   p = &small_global[0];
  31   foo(p, 0);
  32
  33   // Stack variable.
  34   char stack[10000];
  35   foo(&stack[0], 0);
  36   foo(0, &stack[9000]);
  37
  38   return 0;
  39 }