1// RUN: %clangxx_msan -O0 %s -o %t && %run %t %p 2>&1
2// RUN: %clangxx_msan -O0 -D_FILE_OFFSET_BITS=64 %s -o %t && %run %t %p 2>&1
3// RUN: %clangxx_msan -O3 %s -o %t && %run %t %p 2>&1
4
5#include <assert.h>
6#include <errno.h>
7#include <ifaddrs.h>
8#include <stdio.h>
9#include <string.h>
10
11#include <vector>
12
13#if defined(__FreeBSD__) || defined(__NetBSD__)
14#include <sys/socket.h> // To define 'struct sockaddr'.
15#endif
16
17#include <sanitizer/msan_interface.h>
18
19#define CHECK_AND_PUSH(addr, size) \
20 if (addr) { \
21 assert(-1 == __msan_test_shadow(addr, sizeof(size))); \
22 ranges.push_back(std::make_pair((void *)addr, (size_t)size)); \
23 }
24
25int main(int argc, char *argv[]) {
26 struct ifaddrs *ifas;
27
28 assert(0 == __msan_test_shadow(&ifas, sizeof(ifaddrs *)));
29 int res = getifaddrs(ifap: &ifas);
30 if (res == -1) {
31 assert(errno == ENOSYS);
32 printf(format: "getifaddrs() is not implemented\n");
33 return 0;
34 }
35 assert(res == 0);
36 assert(-1 == __msan_test_shadow(&ifas, sizeof(ifaddrs *)));
37
38 std::vector<std::pair<void *, size_t> > ranges;
39 ifaddrs *p = ifas;
40 while (p) {
41 CHECK_AND_PUSH(p, sizeof(ifaddrs));
42 CHECK_AND_PUSH(p->ifa_name, strlen(p->ifa_name) + 1);
43 CHECK_AND_PUSH(p->ifa_addr, sizeof(*p->ifa_addr));
44 CHECK_AND_PUSH(p->ifa_netmask, sizeof(*p->ifa_netmask));
45 CHECK_AND_PUSH(p->ifa_broadaddr, sizeof(*p->ifa_broadaddr));
46 CHECK_AND_PUSH(p->ifa_dstaddr, sizeof(*p->ifa_dstaddr));
47 p = p->ifa_next;
48 }
49
50 freeifaddrs(ifa: ifas);
51 for (int i = 0; i < ranges.size(); i++)
52 assert(0 == __msan_test_shadow(ranges[i].first, ranges[i].second));
53 return 0;
54}
55

source code of compiler-rt/test/msan/ifaddrs.cpp