1 // RUN: %clangxx_msan -O0 -g -DPOSITIVE %s -o %t
2 // RUN: not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK
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 
main(void)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 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.cc:[[@LINE-7]]
25 #endif
26   return 0;
27 }
28 
29