diff -r c80f6ecb0bb3 -r 5f9eee6b383b hotspot/src/share/vm/runtime/os.cpp
--- a/hotspot/src/share/vm/runtime/os.cpp	Tue Mar 15 13:48:21 2016 -0700
+++ b/hotspot/src/share/vm/runtime/os.cpp	Thu Mar 17 19:04:01 2016 +0000
@@ -1193,67 +1193,14 @@
     return formatted_path;
 }
 
-// returns a PATH of all entries in the given directory that do not start with a '.'
-static char* expand_entries_to_path(char* directory, char fileSep, char pathSep) {
-  DIR* dir = os::opendir(directory);
-  if (dir == NULL) return NULL;
-
-  char* path = NULL;
-  size_t path_len = 0;  // path length including \0 terminator
-
-  size_t directory_len = strlen(directory);
-  struct dirent *entry;
-  char* dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtInternal);
-  while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL) {
-    const char* name = entry->d_name;
-    if (name[0] == '.') continue;
-
-    size_t name_len = strlen(name);
-    size_t needed = directory_len + name_len + 2;
-    size_t new_len = path_len + needed;
-    if (path == NULL) {
-      path = NEW_C_HEAP_ARRAY(char, new_len, mtInternal);
-    } else {
-      path = REALLOC_C_HEAP_ARRAY(char, path, new_len, mtInternal);
-    }
-    if (path == NULL)
-      break;
-
-    // append <pathSep>directory<fileSep>name
-    char* p = path;
-    if (path_len > 0) {
-      p += (path_len -1);
-      *p = pathSep;
-      p++;
-    }
-
-    strcpy(p, directory);
-    p += directory_len;
-
-    *p = fileSep;
-    p++;
-
-    strcpy(p, name);
-    p += name_len;
-
-    path_len = new_len;
-  }
-
-  FREE_C_HEAP_ARRAY(char, dbuf);
-  os::closedir(dir);
-
-  return path;
-}
-
 bool os::set_boot_path(char fileSep, char pathSep) {
   const char* home = Arguments::get_java_home();
   int home_len = (int)strlen(home);
 
-  char* sysclasspath = NULL;
   struct stat st;
 
-  // modular image if bootmodules.jimage exists
-  char* jimage = format_boot_path("%/lib/modules/" BOOT_IMAGE_NAME, home, home_len, fileSep, pathSep);
+  // modular image if "modules" jimage exists
+  char* jimage = format_boot_path("%/lib/" MODULES_IMAGE_NAME, home, home_len, fileSep, pathSep);
   if (jimage == NULL) return false;
   bool has_jimage = (os::stat(jimage, &st) == 0);
   if (has_jimage) {
@@ -1264,23 +1211,16 @@
   FREE_C_HEAP_ARRAY(char, jimage);
 
   // check if developer build with exploded modules
-  char* modules_dir = format_boot_path("%/modules", home, home_len, fileSep, pathSep);
-  if (os::stat(modules_dir, &st) == 0) {
-    if ((st.st_mode & S_IFDIR) == S_IFDIR) {
-      sysclasspath = expand_entries_to_path(modules_dir, fileSep, pathSep);
-    }
+  char* base_classes = format_boot_path("%/modules/java.base", home, home_len, fileSep, pathSep);
+  if (base_classes == NULL) return false;
+  if (os::stat(base_classes, &st) == 0) {
+    Arguments::set_sysclasspath(base_classes);
+    FREE_C_HEAP_ARRAY(char, base_classes);
+    return true;
   }
-  FREE_C_HEAP_ARRAY(char, modules_dir);
+  FREE_C_HEAP_ARRAY(char, base_classes);
 
-  // fallback to classes
-  if (sysclasspath == NULL)
-    sysclasspath = format_boot_path("%/classes", home, home_len, fileSep, pathSep);
-
-  if (sysclasspath == NULL) return false;
-  Arguments::set_sysclasspath(sysclasspath);
-  FREE_C_HEAP_ARRAY(char, sysclasspath);
-
-  return true;
+  return false;
 }
 
 /*