Allow redefined methods/classes to access fields

Previously we were not updating the ArtFields of redefined classes.
This meant that the fields of redefined classes could not be accessed.

Bug: 32369913

Test: ./test/run-test --host 917
Test: mma -j40 test-art-host

Change-Id: If039e883e9a57970a0cffbc7dcbbaaf2d44490aa
diff --git a/test/917-fields-transformation/src/Main.java b/test/917-fields-transformation/src/Main.java
new file mode 100644
index 0000000..5378bb7
--- /dev/null
+++ b/test/917-fields-transformation/src/Main.java
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.util.Base64;
+public class Main {
+
+  // base64 encoded class/dex file for
+  // class Transform {
+  //   public String take1;
+  //   public String take2;
+  //
+  //   public Transform(String a, String b) {
+  //     take1 = a;
+  //     take2 = b;
+  //   }
+  //
+  //   public String getResult() {
+  //     return take2;
+  //   }
+  // }
+  private static final byte[] CLASS_BYTES = Base64.getDecoder().decode(
+    "yv66vgAAADQAFwoABQARCQAEABIJAAQAEwcAFAcAFQEABXRha2UxAQASTGphdmEvbGFuZy9TdHJp" +
+    "bmc7AQAFdGFrZTIBAAY8aW5pdD4BACcoTGphdmEvbGFuZy9TdHJpbmc7TGphdmEvbGFuZy9TdHJp" +
+    "bmc7KVYBAARDb2RlAQAPTGluZU51bWJlclRhYmxlAQAJZ2V0UmVzdWx0AQAUKClMamF2YS9sYW5n" +
+    "L1N0cmluZzsBAApTb3VyY2VGaWxlAQAOVHJhbnNmb3JtLmphdmEMAAkAFgwABgAHDAAIAAcBAAlU" +
+    "cmFuc2Zvcm0BABBqYXZhL2xhbmcvT2JqZWN0AQADKClWACAABAAFAAAAAgABAAYABwAAAAEACAAH" +
+    "AAAAAgABAAkACgABAAsAAAAzAAIAAwAAAA8qtwABKiu1AAIqLLUAA7EAAAABAAwAAAASAAQAAAAU" +
+    "AAQAFQAJABYADgAXAAEADQAOAAEACwAAAB0AAQABAAAABSq0AAOwAAAAAQAMAAAABgABAAAAGgAB" +
+    "AA8AAAACABA=");
+  private static final byte[] DEX_BYTES = Base64.getDecoder().decode(
+    "ZGV4CjAzNQAGUTBb4jIABRlaI9rejdk7RCfyqR2kmNSkAgAAcAAAAHhWNBIAAAAAAAAAAAQCAAAM" +
+    "AAAAcAAAAAQAAACgAAAAAwAAALAAAAACAAAA1AAAAAMAAADkAAAAAQAAAPwAAACIAQAAHAEAAFwB" +
+    "AABkAQAAZwEAAHQBAACIAQAAnAEAAKwBAACvAQAAtAEAAMgBAADTAQAA2gEAAAIAAAADAAAABAAA" +
+    "AAYAAAABAAAAAgAAAAAAAAAGAAAAAwAAAAAAAAAHAAAAAwAAAFQBAAAAAAIACgAAAAAAAgALAAAA" +
+    "AAACAAAAAAAAAAAACQAAAAEAAQAAAAAAAAAAAAAAAAABAAAAAAAAAAUAAAAAAAAA8AEAAAAAAAAD" +
+    "AAMAAQAAAOEBAAAIAAAAcBACAAAAWwEAAFsCAQAOAAIAAQAAAAAA6wEAAAMAAABUEAEAEQAAAAIA" +
+    "AAACAAIABjxpbml0PgABTAALTFRyYW5zZm9ybTsAEkxqYXZhL2xhbmcvT2JqZWN0OwASTGphdmEv" +
+    "bGFuZy9TdHJpbmc7AA5UcmFuc2Zvcm0uamF2YQABVgADVkxMABJlbWl0dGVyOiBqYWNrLTQuMTkA" +
+    "CWdldFJlc3VsdAAFdGFrZTEABXRha2UyABQCAAAHDjwtLQAaAAcOAAACAQEAAQEBAIGABJwCAQG8" +
+    "AgAADQAAAAAAAAABAAAAAAAAAAEAAAAMAAAAcAAAAAIAAAAEAAAAoAAAAAMAAAADAAAAsAAAAAQA" +
+    "AAACAAAA1AAAAAUAAAADAAAA5AAAAAYAAAABAAAA/AAAAAEgAAACAAAAHAEAAAEQAAABAAAAVAEA" +
+    "AAIgAAAMAAAAXAEAAAMgAAACAAAA4QEAAAAgAAABAAAA8AEAAAAQAAABAAAABAIAAA==");
+
+  public static void main(String[] args) {
+    System.loadLibrary(args[1]);
+    doTest(new Transform("Hello", "Goodbye"),
+           new Transform("start", "end"));
+  }
+
+  private static void printTransform(Transform t) {
+    System.out.println("Result is " + t.getResult());
+    System.out.println("take1 is " + t.take1);
+    System.out.println("take2 is " + t.take2);
+  }
+  public static void doTest(Transform t1, Transform t2) {
+    printTransform(t1);
+    printTransform(t2);
+    doCommonClassRedefinition(Transform.class, CLASS_BYTES, DEX_BYTES);
+    printTransform(t1);
+    printTransform(t2);
+  }
+
+  // Transforms the class
+  private static native void doCommonClassRedefinition(Class<?> target,
+                                                       byte[] class_file,
+                                                       byte[] dex_file);
+}