1// RUN: %clangxx_msan -std=c++11 -O0 %s -o %t && %run %t
2
3#include <assert.h>
4#include <unistd.h>
5#include <sys/mman.h>
6#include <sanitizer/msan_interface.h>
7
8int main(void) {
9  unsigned char vec[20];
10  int res;
11  size_t PS = sysconf(_SC_PAGESIZE);
12  void *addr = mmap(nullptr, 20 * PS, PROT_READ | PROT_WRITE,
13                    MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
14
15  __msan_poison(&vec, sizeof(vec));
16  res = mincore(addr, 10 * PS, vec);
17  assert(res == 0);
18  assert(__msan_test_shadow(vec, sizeof(vec)) == 10);
19
20  __msan_poison(&vec, sizeof(vec));
21  res = mincore(addr, 10 * PS + 42, vec);
22  assert(res == 0);
23  assert(__msan_test_shadow(vec, sizeof(vec)) == 11);
24
25  __msan_poison(&vec, sizeof(vec));
26  res = mincore(addr, 10 * PS - 1, vec);
27  assert(res == 0);
28  assert(__msan_test_shadow(vec, sizeof(vec)) == 10);
29
30  __msan_poison(&vec, sizeof(vec));
31  res = mincore(addr, 1, vec);
32  assert(res == 0);
33  assert(__msan_test_shadow(vec, sizeof(vec)) == 1);
34
35  return 0;
36}
37