diff --git a/lldb/source/Host/posix/HostInfoPosix.cpp b/lldb/source/Host/posix/HostInfoPosix.cpp
--- a/lldb/source/Host/posix/HostInfoPosix.cpp
+++ b/lldb/source/Host/posix/HostInfoPosix.cpp
@@ -32,10 +32,16 @@
   char hostname[PATH_MAX];
   hostname[sizeof(hostname) - 1] = '\0';
   if (::gethostname(hostname, sizeof(hostname) - 1) == 0) {
-    struct hostent *h = ::gethostbyname(hostname);
-    if (h)
-      s.assign(h->h_name);
-    else
+    struct addrinfo hints;
+    struct addrinfo *res = nullptr;
+    std::memset(&hints, 0, sizeof(hints));
+    hints.ai_flags = AI_CANONNAME;
+    int err = ::getaddrinfo(hostname, nullptr, &hints, &res);
+    if (err == 0) {
+      assert(res->ai_canonname && "getaddrinfo found a canonical name");
+      s.assign(res->ai_canonname);
+      freeaddrinfo(res);
+    } else
       s.assign(hostname);
     return true;
   }