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      1 /*
      2  * Copyright (C) 2010 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 public class Main {
     18     static {
     19         staticMethodCalledByClinit();
     20     }
     21 
     22     private static void staticMethodCalledByClinit() {
     23         // Test that DeliverException works when we need to unwind to a handler -- this method --
     24         // that is currently a resolution stub because it's running on behalf of <clinit>.
     25         try {
     26             throwDuringClinit();
     27             System.err.println("didn't throw!");
     28         } catch (NullPointerException ex) {
     29             System.out.println("caught exception thrown during clinit");
     30         }
     31     }
     32 
     33     private static void throwDuringClinit() {
     34         throw new NullPointerException();
     35     }
     36 
     37     public static void main(String[] args) {
     38         checkExceptions();
     39         checkTiming();
     40         checkStaticMethodInvokeAfterFailedClinit();
     41     }
     42 
     43     public static void sleep(int msec) {
     44         try {
     45             Thread.sleep(msec);
     46         } catch (InterruptedException ie) {
     47             System.err.println("sleep interrupted");
     48         }
     49     }
     50 
     51     static void checkExceptions() {
     52         try {
     53             System.out.println(PartialInit.FIELD0);
     54             System.err.println("Construction of PartialInit succeeded unexpectedly");
     55         } catch (ExceptionInInitializerError eiie) {
     56             System.out.println("Got expected EIIE for FIELD0");
     57         }
     58 
     59         try {
     60             System.out.println(PartialInit.FIELD0);
     61             System.err.println("Load of FIELD0 succeeded unexpectedly");
     62         } catch (NoClassDefFoundError ncdfe) {
     63             System.out.println("Got expected NCDFE for FIELD0");
     64         }
     65         try {
     66             System.out.println(PartialInit.FIELD1);
     67             System.err.println("Load of FIELD1 succeeded unexpectedly");
     68         } catch (NoClassDefFoundError ncdfe) {
     69             System.out.println("Got expected NCDFE for FIELD1");
     70         }
     71 
     72         try {
     73             System.out.println(Exploder.FIELD);
     74             System.err.println("Load of FIELD succeeded unexpectedly");
     75         } catch (AssertionError expected) {
     76             System.out.println("Got expected '" + expected.getMessage() + "' from Exploder");
     77         }
     78     }
     79 
     80     static void checkTiming() {
     81         FieldThread fieldThread = new FieldThread();
     82         MethodThread methodThread = new MethodThread();
     83 
     84         fieldThread.start();
     85         methodThread.start();
     86 
     87         /* start class init */
     88         IntHolder zero = SlowInit.FIELD0;
     89 
     90         /* wait for children to complete */
     91         try {
     92             fieldThread.join();
     93             methodThread.join();
     94         } catch (InterruptedException ie) {
     95             System.err.println(ie);
     96         }
     97 
     98         /* print all values */
     99         System.out.println("Fields (main thread): " +
    100             SlowInit.FIELD0.getValue() + SlowInit.FIELD1.getValue() +
    101             SlowInit.FIELD2.getValue() + SlowInit.FIELD3.getValue());
    102     }
    103 
    104     static class FieldThread extends Thread {
    105         public void run() {
    106             /* allow SlowInit's <clinit> to start */
    107             Main.sleep(5000);
    108 
    109             /* collect fields; should delay until class init completes */
    110             int field0, field1, field2, field3;
    111             field0 = SlowInit.FIELD0.getValue();
    112             field1 = SlowInit.FIELD1.getValue();
    113             field2 = SlowInit.FIELD2.getValue();
    114             field3 = SlowInit.FIELD3.getValue();
    115 
    116             /* let MethodThread print first */
    117             Main.sleep(5000);
    118             System.out.println("Fields (child thread): " +
    119                 field0 + field1 + field2 + field3);
    120         }
    121     }
    122 
    123     static class MethodThread extends Thread {
    124         public void run() {
    125             /* allow SlowInit's <clinit> to start */
    126             Main.sleep(5000);
    127 
    128             /* use a method that shouldn't be accessible yet */
    129             SlowInit.printMsg("MethodThread message");
    130         }
    131     }
    132 
    133     static void checkStaticMethodInvokeAfterFailedClinit() {
    134         System.out.println("checkStaticMethodInvokeAfterFailedClinit START");
    135 
    136         // Call static method to cause implicit clinit.
    137         try {
    138             ClassWithThrowingClinit.staticMethod();
    139             System.out.println("checkStaticMethodInvokeAfterFailedClinit FAILED"
    140                                + " due to missing ExceptionInInitializerError");
    141         } catch (ExceptionInInitializerError expected) {
    142         }
    143 
    144         // Call again to make sure we still get the expected error.
    145         try {
    146             ClassWithThrowingClinit.staticMethod();
    147             System.out.println("checkStaticMethodInvokeAfterFailedClinit FAILED"
    148                                + " due to missing NoClassDefFoundError");
    149         } catch (NoClassDefFoundError expected) {
    150         }
    151         System.out.println("checkStaticMethodInvokeAfterFailedClinit PASSED");
    152     }
    153 
    154     static class ClassWithThrowingClinit {
    155         static {
    156             throwDuringClinit();
    157         }
    158         static void staticMethod() {
    159         }
    160     }
    161 }
    162