ART: Add GetObjectSize and GetObjectHashCode
Add support for these two functions. Add tests.
Bug: 31684578
Test: m test-art-host-run-test-920-objects
Change-Id: If5dfb5aedddee47e5d739b0c56c7d264ba6e2d51
diff --git a/test/920-objects/src/Main.java b/test/920-objects/src/Main.java
new file mode 100644
index 0000000..5dbe1a7
--- /dev/null
+++ b/test/920-objects/src/Main.java
@@ -0,0 +1,98 @@
+/*
+ * 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.lang.reflect.Field;
+import java.util.Arrays;
+
+public class Main {
+ public static void main(String[] args) throws Exception {
+ System.loadLibrary(args[1]);
+
+ doTest();
+ }
+
+ public static void doTest() throws Exception {
+ testObjectSize(new Object());
+ testObjectSize(new Object());
+
+ testObjectSize(new int[0]);
+ testObjectSize(new int[1]);
+ testObjectSize(new int[2]);
+
+ testObjectSize(new double[0]);
+ testObjectSize(new double[1]);
+ testObjectSize(new double[2]);
+
+ testObjectSize(new String("abc"));
+ testObjectSize(new String("wxyz"));
+
+ testObjectHash();
+ }
+
+ private static void testObjectSize(Object o) {
+ System.out.println(o.getClass() + " " + getObjectSize(o));
+ }
+
+ private static void testObjectHash() {
+ Object[] objects = new Object[] {
+ new Object(),
+ new Object(),
+
+ new MyHash(1),
+ new MyHash(1),
+ new MyHash(2)
+ };
+
+ int hashes[] = new int[objects.length];
+
+ for (int i = 0; i < objects.length; i++) {
+ hashes[i] = getObjectHashCode(objects[i]);
+ }
+
+ // Implementation detail: we use the identity hashcode, for simplicity.
+ for (int i = 0; i < objects.length; i++) {
+ int ihash = System.identityHashCode(objects[i]);
+ if (hashes[i] != ihash) {
+ throw new RuntimeException(objects[i] + ": " + hashes[i] + " vs " + ihash);
+ }
+ }
+
+ Runtime.getRuntime().gc();
+ Runtime.getRuntime().gc();
+
+ for (int i = 0; i < objects.length; i++) {
+ int newhash = getObjectHashCode(objects[i]);
+ if (hashes[i] != newhash) {
+ throw new RuntimeException(objects[i] + ": " + hashes[i] + " vs " + newhash);
+ }
+ }
+ }
+
+ private static native long getObjectSize(Object o);
+ private static native int getObjectHashCode(Object o);
+
+ private static class MyHash {
+ private int hash;
+
+ public MyHash(int h) {
+ hash = h;
+ }
+
+ public int hashCode() {
+ return hash;
+ }
+ }
+}