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 8 int 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
