Add resize arrays JVMTI extension
As a prototype for more general object replacement functionality add a
new JVMTI extension that allows one to change the size of arrays. This
extension is 'com.android.art.heap.change_array_size'. As far as any
JVMTI agent, JNI or Java Language code can observer this extension
atomically replaces every reference (strong and weak, global and
local, etc.) with a newly allocated array with the same contents but a
different length. Internally a whole new array will be created then
the old array will have its contents (including lock-word) copied and
all references to the old array will be replaced with the new array.
Test: ./test.py --host
Bug: 134162467
Change-Id: I92a0beabb02e0c92c8c8f9639836014ff1266878
diff --git a/test/1974-resize-array/src/Main.java b/test/1974-resize-array/src/Main.java
new file mode 100644
index 0000000..3843973
--- /dev/null
+++ b/test/1974-resize-array/src/Main.java
@@ -0,0 +1,21 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+public class Main {
+ public static void main(String[] args) throws Exception {
+ art.Test1974.run();
+ }
+}