ART: Extend run-test 068-classloader

Add code that tries to provoke dex-cache collisions.

Change-Id: I58c7905597a501f3731efe4c6e1e2f7772e3b312

3 files changed, 104 insertions, 0 deletions

diff --git a/test/068-classloader/src-ex/MutationTarget.java b/test/068-classloader/src-ex/MutationTarget.java
new file mode 100644
index 0000000000..b02a236aa0
--- /dev/null
+++ b/test/068-classloader/src-ex/MutationTarget.java
@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2015 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.
+ */
+
+/**
+ * Mutator target, see Mutator.java.
+ */
+public class MutationTarget {
+    public static int value = 0;
+}
\ No newline at end of file
diff --git a/test/068-classloader/src-ex/Mutator.java b/test/068-classloader/src-ex/Mutator.java
new file mode 100644
index 0000000000..6bcd5b8554
--- /dev/null
+++ b/test/068-classloader/src-ex/Mutator.java
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2015 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.
+ */
+
+/**
+ * Simple mutator to change a static field of the mutator target. This will require a dex-cache
+ * access, so this setup allows the correct disambiguation between multiple class-loaders.
+ */
+public class Mutator {
+    public static void mutate(int v) {
+        MutationTarget.value = v;
+    }
+}
\ No newline at end of file
diff --git a/test/068-classloader/src/Main.java b/test/068-classloader/src/Main.java
index 7dfb6f507d..1b2a4a4ceb 100644
--- a/test/068-classloader/src/Main.java
+++ b/test/068-classloader/src/Main.java
@@ -58,6 +58,63 @@ public class Main {
         testAbstract(loader);
         testImplement(loader);
         testIfaceImplement(loader);
+
+        testSeparation();
+    }
+
+    static void testSeparation() {
+        FancyLoader loader1 = new FancyLoader(ClassLoader.getSystemClassLoader());
+        FancyLoader loader2 = new FancyLoader(ClassLoader.getSystemClassLoader());
+
+        try {
+            Class target1 = loader1.loadClass("MutationTarget");
+            Class target2 = loader2.loadClass("MutationTarget");
+
+            if (target1 == target2) {
+                throw new RuntimeException("target1 should not be equal to target2");
+            }
+
+            Class mutator1 = loader1.loadClass("Mutator");
+            Class mutator2 = loader2.loadClass("Mutator");
+
+            if (mutator1 == mutator2) {
+                throw new RuntimeException("mutator1 should not be equal to mutator2");
+            }
+
+            runMutator(mutator1, 1);
+
+            int value = getMutationTargetValue(target1);
+            if (value != 1) {
+                throw new RuntimeException("target 1 has unexpected value " + value);
+            }
+            value = getMutationTargetValue(target2);
+            if (value != 0) {
+                throw new RuntimeException("target 2 has unexpected value " + value);
+            }
+
+            runMutator(mutator2, 2);
+
+            value = getMutationTargetValue(target1);
+            if (value != 1) {
+                throw new RuntimeException("target 1 has unexpected value " + value);
+            }
+            value = getMutationTargetValue(target2);
+            if (value != 2) {
+                throw new RuntimeException("target 2 has unexpected value " + value);
+            }
+        } catch (Exception ex) {
+            ex.printStackTrace();
+        }
+    }
+
+    private static void runMutator(Class c, int v) throws Exception {
+        java.lang.reflect.Method m = c.getDeclaredMethod("mutate", int.class);
+        m.invoke(null, v);
+    }
+
+    private static int getMutationTargetValue(Class c) throws Exception {
+        java.lang.reflect.Field f = c.getDeclaredField("value");
+        return f.getInt(null);
     }
 
     /**