memcheck/tests/partial_load.c

   1
   2 #include <stdlib.h>
   3 #include <assert.h>
   4
   5 int main ( void )
   6 {
   7   long  w;
   8   int   i;
   9   char* p;
  10
  11   assert(sizeof(long) == sizeof(void*));
  12
  13   /* partial load, which --partial-loads-ok=yes should suppress */
  14   p = calloc( sizeof(long)-1, 1 );
  15   assert(p);
  16   w = *(long*)p;
  17   free(p);
  18
  19   /* partial but misaligned, cannot be suppressed */
  20   p = calloc( sizeof(long), 1 );
  21   assert(p);
  22   p++;
  23   w += *(long*)p;
  24   p--;
  25   free(p);
  26
  27   /* partial but not word sized, cannot be suppressed */
  28   p = calloc( sizeof(short)-1, 1 );
  29   assert(p);
  30   w += (long)( *(short*)p );
  31   free(p);
  32
  33   /* aligned, word sized, but completely invalid - cannot be suppressed */
  34   p = calloc( sizeof(long), 1 );
  35   assert(p);
  36   free(p);
  37   w += *(long*)p;
  38
  39   /* dump result in a way gcc can't understand */
  40   for (i = 0; i < 64; i++)
  41      w <<= 1;
  42
  43   return (int)w;
  44 }
  45