/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import java.lang.reflect.Method;
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public class Main {
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public static void main(String[] args) {
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System.loadLibrary(args[0]);
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// Get all methods. We cannot call getDeclaredMethod("foo") as
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// that would make "foo" a strong root.
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Method[] methods = Main.class.getDeclaredMethods();
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// Call getName on the methods, which is implemented by using the dex
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// cache and calling setResolvedString.
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for (int i = 0; i < methods.length; i++) {
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methods[i].getName();
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}
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// Compile Main.foo. "foo" needs to be a strong root for JIT compilation.
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// We stress test this:
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// - avoid strongly interning "foo" by doing "f" + "oo"
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// - call GC so that weaks can be collected.
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// - invoke foo() to make sure "foo" hasn't been collected.
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ensureJitCompiled(Main.class, "f" + "oo");
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Runtime.getRuntime().gc();
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foo();
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}
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public static void foo() {
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System.out.println("foo");
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}
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public static native void ensureJitCompiled(Class cls, String method_name);
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}
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