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