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// RUN: %clang_msan -fsanitize-memory-track-origins=2 -latomic -DTEST_STORE -O0 %s -o %t && %run %t 2>&1
// RUN: %clang_msan -fsanitize-memory-track-origins=0 -latomic -DTEST_LOAD -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK
// RUN: %clang_msan -fsanitize-memory-track-origins=2 -latomic -DTEST_LOAD -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) {
#ifdef TEST_LOAD
__atomic_load(src, dst, __ATOMIC_RELAXED);
// CHECK: MemorySanitizer: use-of-uninitialized-value
// CHECK: #0 {{0x[a-f0-9]+}} in main{{.*}}libatomic.c:[[@LINE-8]]
// CHECK-SHADOW: Uninitialized value was stored to memory at
// CHECK-SHADOW: #0 {{0x[a-f0-9]+}} in copy{{.*}}libatomic.c:[[@LINE-6]]
#endif
#ifdef TEST_STORE
// Store always writes a clean shadow
__atomic_store(src, dst, __ATOMIC_RELAXED);
#endif
}
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