1 // RUN: %clangxx_msan -fsanitize-memory-track-origins -O0 %s -o %t && not %run %t >%t.out 2>&1
2 // RUN: FileCheck %s < %t.out && FileCheck %s < %t.out
3
4 // XFAIL: target=mips{{.*}}
5
6 #include <assert.h>
7 #include <wchar.h>
8
9 #include <sanitizer/msan_interface.h>
10
main()11 int main() {
12 const wchar_t *s = L"abc";
13 assert(wcslen(s) == 3);
14
15 wchar_t s2[5];
16 assert(wcsncpy(s2, s, 3) == s2);
17 assert(__msan_test_shadow(&s2, 5 * sizeof(wchar_t)) == 3 * sizeof(wchar_t));
18 assert(wcsncpy(s2, s, 5) == s2);
19 assert(__msan_test_shadow(&s2, 5 * sizeof(wchar_t)) == -1);
20
21 wchar_t s3[5];
22 assert(wcsncpy(s3, s, 2) == s3);
23 assert(__msan_test_shadow(&s3, 5 * sizeof(wchar_t)) == 2 * sizeof(wchar_t));
24
25 __msan_allocated_memory(&s2[1], sizeof(wchar_t));
26 wchar_t s4[5];
27 assert(wcsncpy(s4, s2, 3) == s4);
28 __msan_check_mem_is_initialized(&s4, sizeof(s4));
29 }
30 // CHECK: Uninitialized bytes in __msan_check_mem_is_initialized
31 // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
32 // CHECK: in main {{.*}}wcsncpy.cpp:28
33
34 // CHECK: Uninitialized value was stored to memory at
35 // CHECK: in {{[^\s]*}}wcsncpy
36 // CHECK: in main {{.*}}wcsncpy.cpp:27
37
38 // CHECK: Memory was marked as uninitialized
39 // CHECK: in __msan_allocated_memory
40 // CHECK: in main {{.*}}wcsncpy.cpp:25
41