Create linker namespace for the system server classloader

Bug: http://b/27702070
Change-Id: I12c9448e877202937cf558de75042bcb46f6a933
(cherry picked from commit eb5866d4b0)

core/java/com/android/internal/os/ZygoteInit.java

@@ -475,7 +475,9 @@ public class ZygoteInit {
         } else {
             ClassLoader cl = null;
             if (systemServerClasspath != null) {
-                cl = new PathClassLoader(systemServerClasspath, ClassLoader.getSystemClassLoader());
+                cl = createSystemServerClassLoader(systemServerClasspath,
+                                                   parsedArgs.targetSdkVersion);
+
                 Thread.currentThread().setContextClassLoader(cl);
             }
 
@@ -488,6 +490,23 @@ public class ZygoteInit {
         /* should never reach here */
     }
 
+    /**
+     * Creates a PathClassLoader for the system server. It also creates
+     * a shared namespace associated with the classloader to let it access
+     * platform-private native libraries.
+     */
+    private static PathClassLoader createSystemServerClassLoader(String systemServerClasspath,
+                                                                 int targetSdkVersion) {
+      String librarySearchPath = System.getProperty("java.library.path");
+
+      return PathClassLoaderFactory.createClassLoader(systemServerClasspath,
+                                                      librarySearchPath,
+                                                      null /* libraryPermittedPath */,
+                                                      ClassLoader.getSystemClassLoader(),
+                                                      targetSdkVersion,
+                                                      true /* isNamespaceShared */);
+    }
+
     /**
      * Performs dex-opt on the elements of {@code classPath}, if needed. We
      * choose the instruction set of the current runtime.