/*
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* Copyright (C) 2018 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.Field;
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import java.lang.reflect.Method;
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class NotLoaded {
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public void foo() {}
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}
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public class Main {
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public static void main(String[] args) throws Exception {
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runTest(null);
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}
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// This method being synchronized means the SIGQUIT code in ART will call
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// FindLocksAtDexPc (we check for the presence of try blocks and monitor-enter),
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// which triggered a DCHECK of an invariant.
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public static synchronized void runTest(Object m) throws Exception {
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if (m != null) {
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// We used to crash while trying to resolve NotLoaded and beint interrupted
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// by the SIGQUIT.
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if (m instanceof NotLoaded) {
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((NotLoaded)m).foo();
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}
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}
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SigQuit.doKill();
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// Sleep some time to get the kill while executing this method.
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Thread.sleep(2);
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System.out.println("Done");
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}
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private final static class SigQuit {
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private final static int sigquit;
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private final static Method kill;
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private final static int pid;
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static {
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int pidTemp = -1;
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int sigquitTemp = -1;
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Method killTemp = null;
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try {
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Class<?> osClass = Class.forName("android.system.Os");
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Method getpid = osClass.getDeclaredMethod("getpid");
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pidTemp = (Integer)getpid.invoke(null);
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Class<?> osConstants = Class.forName("android.system.OsConstants");
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Field sigquitField = osConstants.getDeclaredField("SIGQUIT");
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sigquitTemp = (Integer)sigquitField.get(null);
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killTemp = osClass.getDeclaredMethod("kill", int.class, int.class);
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} catch (Exception e) {
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throw new Error(e);
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}
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pid = pidTemp;
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sigquit = sigquitTemp;
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kill = killTemp;
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}
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public static void doKill() throws Exception {
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kill.invoke(null, pid, sigquit);
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}
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}
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}
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