1 #include <stdint.h> 2 #include <darwintest.h> 3 #include <darwintest_utils.h> 4 5 #include "../libkern/os/ptrtools.h" 6 7 #define CHECK_ALIGNMENT(T) \ 8 { \ 9 T *__p; \ 10 T_QUIET; T_EXPECT_EQ_ULONG(__alignof__(*__p), sizeof(*__p), #T " native alignment"); \ 11 T_ASSERT_EQ_ULONG(__alignof__(os_unaligned_deref(__p)), 1UL, #T " alignment"); \ 12 } 13 14 T_GLOBAL_META(T_META_RUN_CONCURRENTLY(true)); 15 16 struct A { 17 int a; 18 }; 19 20 T_DECL(os_unaligned, "Unaligned pointer access") 21 { 22 int x = 0x914842; 23 int *p = &x; 24 25 T_ASSERT_EQ_INT(os_unaligned_deref(p), x, "load"); 26 os_unaligned_deref(&x) = INT_MIN; 27 T_ASSERT_EQ_INT(x, INT_MIN, "store"); 28 29 CHECK_ALIGNMENT(unsigned); 30 CHECK_ALIGNMENT(long long); 31 CHECK_ALIGNMENT(uintptr_t); 32 CHECK_ALIGNMENT(int16_t); 33 CHECK_ALIGNMENT(uint64_t); 34 CHECK_ALIGNMENT(struct A); 35 CHECK_ALIGNMENT(void *); 36 } 37