compiler-rt/test/msan/wcsxfrm.cpp

   1 // RUN: %clangxx_msan -O0 -g %s -o %t && not %run %t
   2
   3 #include <assert.h>
   4 #include <locale.h>
   5 #include <sanitizer/msan_interface.h>
   6 #include <stdlib.h>
   7 #include <wchar.h>
   8
   9 int main(void) {
  10   wchar_t q[10];
  11   size_t n = wcsxfrm(q, L"abcdef", sizeof(q) / sizeof(wchar_t));
  12   assert(n < sizeof(q));
  13   __msan_check_mem_is_initialized(q, (n + 1) * sizeof(wchar_t));
  14
  15   locale_t loc = newlocale(LC_ALL_MASK, "", (locale_t)0);
  16
  17   __msan_poison(&q, sizeof(q));
  18   n = wcsxfrm_l(q, L"qwerty", sizeof(q) / sizeof(wchar_t), loc);
  19   assert(n < sizeof(q));
  20   __msan_check_mem_is_initialized(q, (n + 1) * sizeof(wchar_t));
  21
  22   q[0] = 'A';
  23   q[1] = '\x00';
  24   __msan_poison(&q, sizeof(q));
  25   wcsxfrm(NULL, q, 0);
  26
  27   // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
  28   // CHECK:    in main {{.*}}wcsxfrm.cpp:25
  29   return 0;
  30 }