forked from OSchip/llvm-project
37 lines
1005 B
C++
37 lines
1005 B
C++
// RUN: %clangxx_msan -fexceptions -fsanitize-memory-track-origins=2 -latomic -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-SHADOW
|
|
|
|
// PPC has no libatomic
|
|
// UNSUPPORTED: powerpc64-target-arch
|
|
// UNSUPPORTED: powerpc64le-target-arch
|
|
|
|
#include <sanitizer/msan_interface.h>
|
|
#include <stdatomic.h>
|
|
|
|
typedef struct __attribute((packed)) {
|
|
uint8_t val[3];
|
|
} i24;
|
|
|
|
void copy(i24 *dst, i24 *src);
|
|
|
|
int main() {
|
|
i24 uninit;
|
|
i24 init = {0};
|
|
|
|
__msan_check_mem_is_initialized(&init, 3);
|
|
copy(&init, &uninit);
|
|
__msan_check_mem_is_initialized(&init, 3);
|
|
}
|
|
|
|
void copy(i24 *dst, i24 *src) {
|
|
try {
|
|
__atomic_load(src, dst, __ATOMIC_RELAXED);
|
|
} catch (...) {
|
|
}
|
|
}
|
|
|
|
// CHECK: MemorySanitizer: use-of-uninitialized-value
|
|
// CHECK: #0 {{0x[a-f0-9]+}} in main{{.*}}libatomic_load_exceptions.cpp:[[@LINE-11]]
|
|
|
|
// CHECK-SHADOW: Uninitialized value was stored to memory at
|
|
// CHECK-SHADOW: #0 {{0x[a-f0-9]+}} in copy{{.*}}libatomic_load_exceptions.cpp:[[@LINE-9]]
|