memcheck/tests/clo_redzone.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 int main()
   4 {
   5    __attribute__((unused)) char *p = malloc (1);
   6    char *b1 = malloc (128);
   7    char *b2 = malloc (128);
   8    fprintf (stderr, "b1 %p b2 %p\n", b1, b2);
   9
  10    // Try to land in b2 from b1, causing no error
  11    // with the default redzone-size, but having
  12    // an error with a bigger redzone-size.
  13    // We need to choose a value which lands in b2
  14    // on 32 bits and 64 bits.
  15    b1[127 + 70] = 'a';
  16    return 0;
  17 }