1 // RUN: %clangxx_msan -O0 -g %s -o %t && %run %t
2 // RUN: %clangxx_msan -O3 -g %s -o %t && %run %t
3 
4 #include <assert.h>
5 #include <stdlib.h>
6 #include <string.h>
7 #include <stdio.h>
8 #include <sanitizer/msan_interface.h>
9 
main(void)10 int main(void) {
11   char *p = (char *)alloca(16);
12   assert(0 == __msan_test_shadow(p, 16));
13   assert(0 == __msan_test_shadow(p + 15, 1));
14 
15   memset(p, 0, 16);
16   assert(-1 == __msan_test_shadow(p, 16));
17 
18   volatile int x = 0;
19   char * volatile q = (char *)alloca(42 * x);
20   assert(-1 == __msan_test_shadow(p, 16));
21 
22   int r[x];
23   int *volatile r2 = r;
24   assert(-1 == __msan_test_shadow(p, 16));
25 }
26