xref: /aosp_15_r20/art/test/661-classloader-allocator/src/Main.java (revision 795d594fd825385562da6b089ea9b2033f3abf5a)
1*795d594fSAndroid Build Coastguard Worker /*
2*795d594fSAndroid Build Coastguard Worker  * Copyright (C) 2017 The Android Open Source Project
3*795d594fSAndroid Build Coastguard Worker  *
4*795d594fSAndroid Build Coastguard Worker  * Licensed under the Apache License, Version 2.0 (the "License");
5*795d594fSAndroid Build Coastguard Worker  * you may not use this file except in compliance with the License.
6*795d594fSAndroid Build Coastguard Worker  * You may obtain a copy of the License at
7*795d594fSAndroid Build Coastguard Worker  *
8*795d594fSAndroid Build Coastguard Worker  *      http://www.apache.org/licenses/LICENSE-2.0
9*795d594fSAndroid Build Coastguard Worker  *
10*795d594fSAndroid Build Coastguard Worker  * Unless required by applicable law or agreed to in writing, software
11*795d594fSAndroid Build Coastguard Worker  * distributed under the License is distributed on an "AS IS" BASIS,
12*795d594fSAndroid Build Coastguard Worker  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13*795d594fSAndroid Build Coastguard Worker  * See the License for the specific language governing permissions and
14*795d594fSAndroid Build Coastguard Worker  * limitations under the License.
15*795d594fSAndroid Build Coastguard Worker  */
16*795d594fSAndroid Build Coastguard Worker 
17*795d594fSAndroid Build Coastguard Worker import java.lang.reflect.Constructor;
18*795d594fSAndroid Build Coastguard Worker 
19*795d594fSAndroid Build Coastguard Worker public class Main {
20*795d594fSAndroid Build Coastguard Worker   static final String DEX_FILE =
21*795d594fSAndroid Build Coastguard Worker       System.getenv("DEX_LOCATION") + "/661-classloader-allocator-ex.jar";
22*795d594fSAndroid Build Coastguard Worker   static final String LIBRARY_SEARCH_PATH = System.getProperty("java.library.path");
23*795d594fSAndroid Build Coastguard Worker 
doUnloading()24*795d594fSAndroid Build Coastguard Worker   private static void doUnloading() {
25*795d594fSAndroid Build Coastguard Worker     // Stop the JIT to ensure its threads and work queue are not keeping classes
26*795d594fSAndroid Build Coastguard Worker     // artifically alive.
27*795d594fSAndroid Build Coastguard Worker     stopJit();
28*795d594fSAndroid Build Coastguard Worker     // Do multiple GCs to prevent rare flakiness if some other thread is keeping the
29*795d594fSAndroid Build Coastguard Worker     // classloader live.
30*795d594fSAndroid Build Coastguard Worker     for (int i = 0; i < 5; ++i) {
31*795d594fSAndroid Build Coastguard Worker       Runtime.getRuntime().gc();
32*795d594fSAndroid Build Coastguard Worker     }
33*795d594fSAndroid Build Coastguard Worker     startJit();
34*795d594fSAndroid Build Coastguard Worker   }
35*795d594fSAndroid Build Coastguard Worker 
main(String[] args)36*795d594fSAndroid Build Coastguard Worker   public static void main(String[] args) throws Exception {
37*795d594fSAndroid Build Coastguard Worker     System.loadLibrary(args[0]);
38*795d594fSAndroid Build Coastguard Worker     loadClass();
39*795d594fSAndroid Build Coastguard Worker     doUnloading();
40*795d594fSAndroid Build Coastguard Worker     // fetchProfiles iterate over the ProfilingInfo, we used to crash in the presence
41*795d594fSAndroid Build Coastguard Worker     // of unloaded copied methods.
42*795d594fSAndroid Build Coastguard Worker     fetchProfiles();
43*795d594fSAndroid Build Coastguard Worker   }
44*795d594fSAndroid Build Coastguard Worker 
loadClass()45*795d594fSAndroid Build Coastguard Worker   public static void loadClass() throws Exception {
46*795d594fSAndroid Build Coastguard Worker     Class<?> pathClassLoader = Class.forName("dalvik.system.PathClassLoader");
47*795d594fSAndroid Build Coastguard Worker     if (pathClassLoader == null) {
48*795d594fSAndroid Build Coastguard Worker       throw new AssertionError("Couldn't find path class loader class");
49*795d594fSAndroid Build Coastguard Worker     }
50*795d594fSAndroid Build Coastguard Worker     Constructor<?> constructor =
51*795d594fSAndroid Build Coastguard Worker       pathClassLoader.getDeclaredConstructor(String.class, String.class, ClassLoader.class);
52*795d594fSAndroid Build Coastguard Worker     ClassLoader loader = (ClassLoader) constructor.newInstance(
53*795d594fSAndroid Build Coastguard Worker       DEX_FILE, LIBRARY_SEARCH_PATH, ClassLoader.getSystemClassLoader());
54*795d594fSAndroid Build Coastguard Worker     Class<?> otherClass = loader.loadClass("p1.OtherClass");
55*795d594fSAndroid Build Coastguard Worker     ensureJitCompiled(otherClass, "foo");
56*795d594fSAndroid Build Coastguard Worker   }
57*795d594fSAndroid Build Coastguard Worker 
ensureJitCompiled(Class<?> cls, String methodName)58*795d594fSAndroid Build Coastguard Worker   public static native void ensureJitCompiled(Class<?> cls, String methodName);
fetchProfiles()59*795d594fSAndroid Build Coastguard Worker   public static native void fetchProfiles();
stopJit()60*795d594fSAndroid Build Coastguard Worker   public static native void stopJit();
startJit()61*795d594fSAndroid Build Coastguard Worker   public static native void startJit();
62*795d594fSAndroid Build Coastguard Worker }
63