Move Class.newInstance to native

Also add benchmark for Class.newInstance.

Bug: 20269715
Change-Id: Icd52155ce79a978a4d869855bfdfd7735abd8187

2 files changed, 1 insertions, 34 deletions

diff --git a/libart/src/main/java/java/lang/Class.java b/libart/src/main/java/java/lang/Class.java
index 1072ce8..99c562f 100644
--- a/libart/src/main/java/java/lang/Class.java
+++ b/libart/src/main/java/java/lang/Class.java
@@ -1379,33 +1379,7 @@ public final class Class<T> implements Serializable, AnnotatedElement, GenericDe
      * @throws InstantiationException
      *             if the instance cannot be created.
      */
-    public T newInstance() throws InstantiationException, IllegalAccessException {
-        if (isPrimitive() || isInterface() || isArray() || Modifier.isAbstract(accessFlags)) {
-            throw new InstantiationException(this + " cannot be instantiated");
-        }
-        Class<?> caller = VMStack.getStackClass1();
-        if (!caller.canAccess(this)) {
-          throw new IllegalAccessException(this + " is not accessible from " + caller);
-        }
-        Constructor<T> init;
-        try {
-            init = getDeclaredConstructor();
-        } catch (NoSuchMethodException e) {
-            InstantiationException t =
-                new InstantiationException(this + " has no zero argument constructor");
-            t.initCause(e);
-            throw t;
-        }
-        if (!caller.canAccessMember(this, init.getAccessFlags())) {
-          throw new IllegalAccessException(init + " is not accessible from " + caller);
-        }
-        try {
-          return init.newInstanceTwoFrames();
-        } catch (InvocationTargetException e) {
-          SneakyThrow.sneakyThrow(e.getCause());
-          return null;  // Unreachable.
-        }
-    }
+    public native T newInstance() throws InstantiationException, IllegalAccessException;
 
     private boolean canAccess(Class<?> c) {
         if(Modifier.isPublic(c.accessFlags)) {
diff --git a/libart/src/main/java/java/lang/reflect/Constructor.java b/libart/src/main/java/java/lang/reflect/Constructor.java
index 9701147..9711ef4 100644
--- a/libart/src/main/java/java/lang/reflect/Constructor.java
+++ b/libart/src/main/java/java/lang/reflect/Constructor.java
@@ -284,13 +284,6 @@ public final class Constructor<T> extends AbstractMethod implements GenericDecla
             IllegalAccessException, IllegalArgumentException, InvocationTargetException;
 
     /**
-     * Special version that looks up two frames for access check. Used by Class.newInstance.
-     * @hide
-     */
-    public native T newInstanceTwoFrames(Object... args) throws InstantiationException,
-            IllegalAccessException, IllegalArgumentException, InvocationTargetException;
-
-    /**
      * Returns a string containing a concise, human-readable description of this
      * constructor. The format of the string is:
      *