compiler-rt/test/msan/msan_check_mem_is_initialized.cpp

   1 // RUN: %clangxx_msan -O0 -g -DPOSITIVE %s -o %t
   2 // RUN: not %run %t 2>&1 | FileCheck %s
   3 // RUN: MSAN_OPTIONS=verbosity=1 not %run %t 2>&1 | \
   4 // RUN:     FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-VERBOSE
   5
   6 // RUN: %clangxx_msan -O0 -g %s -o %t && %run %t
   7
   8 #include <sanitizer/msan_interface.h>
   9
  10 int main(void) {
  11   char p[32] = {};
  12   __msan_poison(p + 10, 2);
  13
  14   __msan_check_mem_is_initialized(p, 10);
  15   __msan_check_mem_is_initialized(p + 12, 30);
  16 #ifdef POSITIVE
  17   __msan_check_mem_is_initialized(p + 5, 20);
  18   // CHECK: Uninitialized bytes in __msan_check_mem_is_initialized at offset 5 inside [0x{{.*}}, 20)
  19   // CHECK-VERBOSE: Shadow map [0x{{.*}}, 0x{{.*}}) of [0x{{.*}}, 0x{{.*}}), 20 bytes:
  20   // CHECK-VERBOSE: 0x{{.*}}: ..000000 0000ffff 00000000 00000000
  21   // CHECK-VERBOSE: 0x{{.*}}: 00000000 00...... ........ ........
  22
  23   // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
  24   // CHECK: #0 0x{{.*}}in main{{.*}}msan_check_mem_is_initialized.cpp:[[@LINE-7]]
  25 #endif
  26   return 0;
  27 }
  28