37 lines · cpp
1// RUN: %clangxx_msan -std=c++11 -O0 %s -o %t && %run %t2 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