--- old/src/os/aix/vm/os_aix.cpp	2019-02-15 19:02:11.315746964 +0300
+++ new/src/os/aix/vm/os_aix.cpp	2019-02-15 19:02:11.163752288 +0300
@@ -1555,6 +1555,11 @@
   st->cr();
 }
 
+int os::get_loaded_modules_info(os::LoadedModulesCallbackFunc callback, void *param) {
+  // Not yet implemented.
+  return 0;
+}
+
 void os::print_memory_info(outputStream* st) {
 
   st->print_cr("Memory:");
@@ -2793,6 +2798,10 @@
   return ::read(fd, buf, nBytes);
 }
 
+size_t os::read_at(int fd, void *buf, unsigned int nBytes, jlong offset) {
+  return ::pread(fd, buf, nBytes, offset);
+}
+
 #define NANOSECS_PER_MILLISEC 1000000
 
 int os::sleep(Thread* thread, jlong millis, bool interruptible) {
@@ -4184,8 +4193,7 @@
 
   /* Scan the directory */
   bool result = true;
-  char buf[sizeof(struct dirent) + MAX_PATH];
-  while (result && (ptr = ::readdir(dir)) != NULL) {
+  while (result && (ptr = readdir(dir)) != NULL) {
     if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) {
       result = false;
     }