gcc/testsuite/c-c++-common/ubsan/align-2.c

   1 /* Limit this to known non-strict alignment targets.  */
   2 /* { dg-do run { target { i?86-*-linux* x86_64-*-linux* } } } */
   3 /* { dg-options "-fsanitize=alignment" } */
   4
   5 struct S { int a; char b; long long c; short d[10]; };
   6 struct T { char a; long long b; };
   7 struct U { char a; int b; int c; long long d; struct S e; struct T f; } __attribute__((packed));
   8 struct V { long long a; struct S b; struct T c; struct U u; } v;
   9
  10 __attribute__((noinline, noclone)) void
  11 f1 (int *p, int *q, char *r, long long *s)
  12 {
  13   *p =
  14       *q
  15       + *r
  16       + *s;
  17 }
  18
  19
  20 __attribute__((noinline, noclone)) int
  21 f2 (struct S *p)
  22 {
  23   return p->a;
  24 }
  25
  26 __attribute__((noinline, noclone)) long long
  27 f3 (struct S *p, int i)
  28 {
  29   return p->c
  30          + p->d[1]
  31          + p->d[i];
  32 }
  33
  34 __attribute__((noinline, noclone)) long long
  35 f4 (long long *p)
  36 {
  37   return *p;
  38 }
  39
  40 int
  41 main ()
  42 {
  43   f1 (&v.u.b, &v.u.c, &v.u.a, &v.u.d);
  44   if (f2 (&v.u.e) + f3 (&v.u.e, 4) + f4 (&v.u.f.b) != 0)
  45     __builtin_abort ();
  46   return 0;
  47 }
  48
  49 /* { dg-output "\.c:(14|15):\[0-9]*: \[^\n\r]*load of misaligned address 0x\[0-9a-fA-F]* for type 'int', which requires 4 byte alignment.*" } */
  50 /* { dg-output "\.c:16:\[0-9]*: \[^\n\r]*load of misaligned address 0x\[0-9a-fA-F]* for type 'long long int', which requires \[48] byte alignment.*" } */
  51 /* { dg-output "\.c:(13|16):\[0-9]*: \[^\n\r]*store to misaligned address 0x\[0-9a-fA-F]* for type 'int', which requires 4 byte alignment.*" } */
  52 /* { dg-output "\.c:23:\[0-9]*: \[^\n\r]*member access within misaligned address 0x\[0-9a-fA-F]* for type 'struct S', which requires \[48] byte alignment.*" } */
  53 /* { dg-output "\.c:(29|30):\[0-9]*: \[^\n\r]*member access within misaligned address 0x\[0-9a-fA-F]* for type 'struct S', which requires \[48] byte alignment.*" } */
  54 /* { dg-output "\.c:30:\[0-9]*: \[^\n\r]*member access within misaligned address 0x\[0-9a-fA-F]* for type 'struct S', which requires \[48] byte alignment.*" } */
  55 /* { dg-output "\.c:31:\[0-9]*: \[^\n\r]*member access within misaligned address 0x\[0-9a-fA-F]* for type 'struct S', which requires \[48] byte alignment.*" } */
  56 /* { dg-output "\.c:37:\[0-9]*: \[^\n\r]*load of misaligned address 0x\[0-9a-fA-F]* for type 'long long int', which requires \[48] byte alignment" } */