Revert "Revert "Revert "Revert "JIT root tables.""""

Test: 626-set-resolved-string, test-art-host, test-art-target
Test: run-libcore-tests.sh
Test: phone boots and runs

This reverts commit 3395fbc20bcd20948bec8958db91b304c17cacd8.

Change-Id: I104b73d093e3eb6a271d564cfdb9ab09c1c8cf24

1 files changed, 48 insertions, 0 deletions

diff --git a/test/626-set-resolved-string/src/Main.java b/test/626-set-resolved-string/src/Main.java
new file mode 100644
index 0000000000..868b9d1e40
--- /dev/null
+++ b/test/626-set-resolved-string/src/Main.java
@@ -0,0 +1,48 @@
+/*
+ * 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.Method;
+
+public class Main {
+  public static void main(String[] args) {
+    System.loadLibrary(args[0]);
+
+    // Get all methods. We cannot call getDeclaredMethod("foo") as
+    // that would make "foo" a strong root.
+    Method[] methods = Main.class.getDeclaredMethods();
+
+    // Call getName on the methods, which is implemented by using the dex
+    // cache and  calling setResolvedString.
+    for (int i = 0; i < methods.length; i++) {
+      methods[i].getName();
+    }
+
+    // Compile Main.foo. "foo" needs to be a strong root for JIT compilation.
+    // We stress test this:
+    //   - avoid strongly interning "foo" by doing "f" + "oo"
+    //   - call GC so that weaks can be collected.
+    //   - invoke foo() to make sure "foo" hasn't been collected.
+    ensureJitCompiled(Main.class, "f" + "oo");
+    Runtime.getRuntime().gc();
+    foo();
+  }
+
+  public static void foo() {
+    System.out.println("foo");
+  }
+
+  public static native void ensureJitCompiled(Class cls, String method_name);
+}