73114e43ee
- add XFAIL/UNSUPPORTED annotations for tests run wtih real MSVC - macroify usages of clang-specific attributes in asan tests - Add substitution for /Oy-/-fno-omit-frame-pointer This makes the dll_intercept_memset test work with mingw These are most of the changes that are required to get things running with MSVC, however there are some remaining build-flag tweaks. Nothing in here should be a functional change.
58 lines
1.2 KiB
C++
58 lines
1.2 KiB
C++
// Verifies that speculative loads from unions do not happen under asan.
|
|
// RUN: %clangxx_asan -O0 %s -o %t && %run %t 2>&1
|
|
// RUN: %clangxx_asan -O1 %s -o %t && %run %t 2>&1
|
|
// RUN: %clangxx_asan -O2 %s -o %t && %run %t 2>&1
|
|
// RUN: %clangxx_asan -O3 %s -o %t && %run %t 2>&1
|
|
|
|
// MSVC doesn't support GCC style inline assembly
|
|
// UNSUPPORTED: msvc
|
|
|
|
#include <sanitizer/asan_interface.h>
|
|
|
|
struct S {
|
|
struct _long {
|
|
void* _pad;
|
|
const char* _ptr;
|
|
};
|
|
|
|
struct _short {
|
|
unsigned char _size;
|
|
char _ch[23];
|
|
};
|
|
|
|
union {
|
|
_short _s;
|
|
_long _l;
|
|
} _data;
|
|
|
|
S() {
|
|
_data._s._size = 0;
|
|
__asan_poison_memory_region(_data._s._ch, 23);
|
|
}
|
|
|
|
~S() {
|
|
__asan_unpoison_memory_region(_data._s._ch, 23);
|
|
}
|
|
|
|
bool is_long() const {
|
|
return _data._s._size & 1;
|
|
}
|
|
|
|
const char* get_pointer() const {
|
|
return is_long() ? _data._l._ptr : _data._s._ch;
|
|
}
|
|
};
|
|
|
|
|
|
inline void side_effect(const void *arg) {
|
|
__asm__ __volatile__("" : : "r" (arg) : "memory");
|
|
}
|
|
|
|
int main(int argc, char **argv) {
|
|
S s;
|
|
side_effect(&s); // optimizer is too smart otherwise
|
|
const char *ptr = s.get_pointer();
|
|
side_effect(ptr); // force use ptr
|
|
return 0;
|
|
}
|