Webrev: http://cr.openjdk.java.net/~mchung/jdk9/webrevs/8165563/webrev.00/
ClassLoader::getPlatformClassLoader [1] is added in JDK 9 that is parent or ancestor of the system class loader [1]. The system class loader will never be null. Another relevant change in JDK 9 was that the system initialization was reworked that the built-in system class loader is initialized very early during startup. This patch updates ClassLoader::getSystemClassLoader to return a non-null system class loader and the implementation of a few methods to handle the null system class loader case. Mandy [1] http://download.java.net/java/jdk9/docs/api/java/lang/ClassLoader.html#builtinLoaders
