diff options
Diffstat (limited to 'test/141-class-unload')
| -rw-r--r-- | test/141-class-unload/expected.txt | 18 | ||||
| -rw-r--r-- | test/141-class-unload/info.txt | 1 | ||||
| -rw-r--r-- | test/141-class-unload/jni_unload.cc | 37 | ||||
| -rw-r--r-- | test/141-class-unload/src-ex/IntHolder.java | 39 | ||||
| -rw-r--r-- | test/141-class-unload/src/Main.java | 154 |
5 files changed, 249 insertions, 0 deletions
diff --git a/test/141-class-unload/expected.txt b/test/141-class-unload/expected.txt new file mode 100644 index 0000000000..ff65a70b12 --- /dev/null +++ b/test/141-class-unload/expected.txt @@ -0,0 +1,18 @@ +1 +2 +JNI_OnLoad called +JNI_OnUnload called +1 +2 +JNI_OnLoad called +JNI_OnUnload called +null +null +JNI_OnLoad called +JNI_OnUnload called +null +loader null false +loader null false +JNI_OnLoad called +JNI_OnUnload called +null diff --git a/test/141-class-unload/info.txt b/test/141-class-unload/info.txt new file mode 100644 index 0000000000..d8dd381dc7 --- /dev/null +++ b/test/141-class-unload/info.txt @@ -0,0 +1 @@ +Test that classes get freed after they are no longer reachable. diff --git a/test/141-class-unload/jni_unload.cc b/test/141-class-unload/jni_unload.cc new file mode 100644 index 0000000000..d913efe53e --- /dev/null +++ b/test/141-class-unload/jni_unload.cc @@ -0,0 +1,37 @@ +/* + * 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. + */ + +#include "jni.h" + +#include <iostream> + +#include "jit/jit.h" +#include "jit/jit_instrumentation.h" +#include "runtime.h" +#include "thread-inl.h" + +namespace art { +namespace { + +extern "C" JNIEXPORT void JNICALL Java_IntHolder_waitForCompilation(JNIEnv*, jclass) { + jit::Jit* jit = Runtime::Current()->GetJit(); + if (jit != nullptr) { + jit->GetInstrumentationCache()->WaitForCompilationToFinish(Thread::Current()); + } +} + +} // namespace +} // namespace art diff --git a/test/141-class-unload/src-ex/IntHolder.java b/test/141-class-unload/src-ex/IntHolder.java new file mode 100644 index 0000000000..e4aa6b8949 --- /dev/null +++ b/test/141-class-unload/src-ex/IntHolder.java @@ -0,0 +1,39 @@ +/* + * 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 class that holds a static int for testing that class unloading works +// and re-runs the class initializer. +public class IntHolder { + private static int value = 1; + + public static void setValue(int newValue) { + value = newValue; + } + + public static int getValue() { + return value; + } + + public static void runGC() { + Runtime.getRuntime().gc(); + } + + public static void loadLibrary(String name) { + System.loadLibrary(name); + } + + public static native void waitForCompilation(); +} diff --git a/test/141-class-unload/src/Main.java b/test/141-class-unload/src/Main.java new file mode 100644 index 0000000000..105a2b981c --- /dev/null +++ b/test/141-class-unload/src/Main.java @@ -0,0 +1,154 @@ +/* + * 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. + */ + +import java.lang.ref.WeakReference; +import java.lang.reflect.Constructor; +import java.lang.reflect.Method; + +public class Main { + static final String DEX_FILE = System.getenv("DEX_LOCATION") + "/141-class-unload-ex.jar"; + static String nativeLibraryName; + + public static void main(String[] args) throws Exception { + nativeLibraryName = args[0]; + Class pathClassLoader = Class.forName("dalvik.system.PathClassLoader"); + if (pathClassLoader == null) { + throw new AssertionError("Couldn't find path class loader class"); + } + Constructor constructor = + pathClassLoader.getDeclaredConstructor(String.class, ClassLoader.class); + try { + testUnloadClass(constructor); + testUnloadLoader(constructor); + // Test that we don't unload if we have a Method keeping the class live. + testNoUnloadInvoke(constructor); + // Test that we don't unload if we have an instance. + testNoUnloadInstance(constructor); + // Test JNI_OnLoad and JNI_OnUnload. + testLoadAndUnloadLibrary(constructor); + // Stress test to make sure we dont leak memory. + stressTest(constructor); + } catch (Exception e) { + System.out.println(e); + } + } + + private static void stressTest(Constructor constructor) throws Exception { + for (int i = 0; i <= 100; ++i) { + setUpUnloadLoader(constructor, false); + if (i % 10 == 0) { + Runtime.getRuntime().gc(); + } + } + } + + private static void testUnloadClass(Constructor constructor) throws Exception { + WeakReference<Class> klass = setUpUnloadClass(constructor); + // No strong refernces to class loader, should get unloaded. + Runtime.getRuntime().gc(); + WeakReference<Class> klass2 = setUpUnloadClass(constructor); + Runtime.getRuntime().gc(); + // If the weak reference is cleared, then it was unloaded. + System.out.println(klass.get()); + System.out.println(klass2.get()); + } + + private static void testUnloadLoader(Constructor constructor) + throws Exception { + WeakReference<ClassLoader> loader = setUpUnloadLoader(constructor, true); + // No strong refernces to class loader, should get unloaded. + Runtime.getRuntime().gc(); + // If the weak reference is cleared, then it was unloaded. + System.out.println(loader.get()); + } + + private static void testLoadAndUnloadLibrary(Constructor constructor) throws Exception { + WeakReference<ClassLoader> loader = setUpLoadLibrary(constructor); + // No strong refernces to class loader, should get unloaded. + Runtime.getRuntime().gc(); + // If the weak reference is cleared, then it was unloaded. + System.out.println(loader.get()); + } + + private static void testNoUnloadInvoke(Constructor constructor) throws Exception { + WeakReference<ClassLoader> loader = + new WeakReference((ClassLoader) constructor.newInstance( + DEX_FILE, ClassLoader.getSystemClassLoader())); + WeakReference<Class> intHolder = new WeakReference(loader.get().loadClass("IntHolder")); + intHolder.get().getDeclaredMethod("runGC").invoke(intHolder.get()); + boolean isNull = loader.get() == null; + System.out.println("loader null " + isNull); + } + + private static void testNoUnloadInstance(Constructor constructor) throws Exception { + WeakReference<ClassLoader> loader = + new WeakReference((ClassLoader) constructor.newInstance( + DEX_FILE, ClassLoader.getSystemClassLoader())); + WeakReference<Class> intHolder = new WeakReference(loader.get().loadClass("IntHolder")); + Object o = intHolder.get().newInstance(); + Runtime.getRuntime().gc(); + boolean isNull = loader.get() == null; + System.out.println("loader null " + isNull); + } + + private static WeakReference<Class> setUpUnloadClass(Constructor constructor) throws Exception { + ClassLoader loader = (ClassLoader) constructor.newInstance( + DEX_FILE, ClassLoader.getSystemClassLoader()); + Class intHolder = loader.loadClass("IntHolder"); + Method getValue = intHolder.getDeclaredMethod("getValue"); + Method setValue = intHolder.getDeclaredMethod("setValue", Integer.TYPE); + // Make sure we don't accidentally preserve the value in the int holder, the class + // initializer should be re-run. + System.out.println((int) getValue.invoke(intHolder)); + setValue.invoke(intHolder, 2); + System.out.println((int) getValue.invoke(intHolder)); + waitForCompilation(intHolder); + return new WeakReference(intHolder); + } + + private static WeakReference<ClassLoader> setUpUnloadLoader(Constructor constructor, + boolean waitForCompilation) + throws Exception { + ClassLoader loader = (ClassLoader) constructor.newInstance( + DEX_FILE, ClassLoader.getSystemClassLoader()); + Class intHolder = loader.loadClass("IntHolder"); + Method setValue = intHolder.getDeclaredMethod("setValue", Integer.TYPE); + setValue.invoke(intHolder, 2); + if (waitForCompilation) { + waitForCompilation(intHolder); + } + return new WeakReference(loader); + } + + private static void waitForCompilation(Class intHolder) throws Exception { + // Load the native library so that we can call waitForCompilation. + Method loadLibrary = intHolder.getDeclaredMethod("loadLibrary", String.class); + loadLibrary.invoke(intHolder, nativeLibraryName); + // Wait for JIT compilation to finish since the async threads may prevent unloading. + Method waitForCompilation = intHolder.getDeclaredMethod("waitForCompilation"); + waitForCompilation.invoke(intHolder); + } + + private static WeakReference<ClassLoader> setUpLoadLibrary(Constructor constructor) + throws Exception { + ClassLoader loader = (ClassLoader) constructor.newInstance( + DEX_FILE, ClassLoader.getSystemClassLoader()); + Class intHolder = loader.loadClass("IntHolder"); + Method loadLibrary = intHolder.getDeclaredMethod("loadLibrary", String.class); + loadLibrary.invoke(intHolder, nativeLibraryName); + return new WeakReference(loader); + } +} |