compiler-rt/test/msan/wcsncpy.cpp

   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
  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