1 /*
   2  * Copyright (c) 2013, 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 package sun.hotspot.tools.ctw;
  25 
  26 import java.lang.management.ManagementFactory;
  27 
  28 import java.io.*;
  29 import java.nio.file.Files;
  30 import java.nio.file.Paths;
  31 
  32 import java.util.Arrays;
  33 import java.util.List;
  34 import java.util.concurrent.*;
  35 
  36 public class CompileTheWorld {
  37     // in case when a static constructor changes System::out and System::err
  38     // we hold these values of output streams
  39     static PrintStream OUT = System.out;
  40     static final PrintStream ERR = System.err;
  41     /**
  42      * Entry point. Compiles classes in {@code paths}
  43      *
  44      * @param paths paths to jar/zip, dir contains classes, or to .lst file
  45      *              contains list of classes to compile
  46      */
  47     public static void main(String[] paths) {
  48         if (paths.length == 0) {
  49             throw new IllegalArgumentException("Expect a path to a compile target.");
  50         }
  51         String logfile = Utils.LOG_FILE;
  52         PrintStream os = null;
  53         if (logfile != null) {
  54             try {
  55                 os = new PrintStream(Files.newOutputStream(Paths.get(logfile)));
  56             } catch (IOException io) {
  57             }
  58         }
  59         if (os != null) {
  60             OUT = os;
  61         }
  62 
  63         boolean passed = false;
  64 
  65         try {
  66             try {
  67                 if (ManagementFactory.getCompilationMXBean() == null) {
  68                     throw new RuntimeException(
  69                             "CTW can not work in interpreted mode");
  70                 }
  71             } catch (java.lang.NoClassDefFoundError e) {
  72                 // compact1, compact2 support
  73             }
  74             ExecutorService executor = createExecutor();
  75             long start = System.currentTimeMillis();
  76             try {
  77                 Arrays.stream(paths)
  78                       .map(PathHandler::create)
  79                       .flatMap(List::stream)
  80                       .forEach(p -> {
  81                           try {
  82                               p.process(executor);
  83                           } finally {
  84                               p.close();
  85                           }
  86                         });
  87             } finally {
  88                 await(executor);
  89             }
  90             CompileTheWorld.OUT.printf("Done (%d classes, %d methods, %d ms)%n",
  91                     PathHandler.getProcessedClassCount(),
  92                     Compiler.getMethodCount(),
  93                     System.currentTimeMillis() - start);
  94             passed = true;
  95         } catch (Throwable t){
  96             t.printStackTrace(ERR);
  97         } finally {
  98             try {
  99                 OUT.close();
 100             } catch (Throwable ignore) {
 101             }
 102             // <clinit> might have started new threads
 103             System.exit(passed ? 0 : 1);
 104         }
 105     }
 106 
 107     private static ExecutorService createExecutor() {
 108         final int threadsCount = Math.min(
 109                 Runtime.getRuntime().availableProcessors(),
 110                 Utils.CI_COMPILER_COUNT);
 111         ExecutorService result;
 112         if (threadsCount > 1) {
 113             result = new ThreadPoolExecutor(threadsCount, threadsCount,
 114                     /* keepAliveTime */ 0L, TimeUnit.MILLISECONDS,
 115                     new ArrayBlockingQueue<>(threadsCount),
 116                     new ThreadPoolExecutor.CallerRunsPolicy());
 117         } else {
 118             result = new CurrentThreadExecutor();
 119         }
 120         return result;
 121     }
 122 
 123     private static void await(ExecutorService executor) {
 124         executor.shutdown();
 125         while (!executor.isTerminated()) {
 126             try {
 127                 executor.awaitTermination(Long.MAX_VALUE, TimeUnit.NANOSECONDS);
 128             } catch (InterruptedException ie) {
 129                 Thread.currentThread().interrupt();
 130                 break;
 131             }
 132         }
 133     }
 134 
 135     private static class CurrentThreadExecutor extends AbstractExecutorService {
 136         private boolean isShutdown;
 137 
 138         @Override
 139         public void shutdown() {
 140             this.isShutdown = true;
 141         }
 142 
 143         @Override
 144         public List<Runnable> shutdownNow() {
 145             return null;
 146         }
 147 
 148         @Override
 149         public boolean isShutdown() {
 150             return isShutdown;
 151         }
 152 
 153         @Override
 154         public boolean isTerminated() {
 155             return isShutdown;
 156         }
 157 
 158         @Override
 159         public boolean awaitTermination(long timeout, TimeUnit unit)
 160                 throws InterruptedException {
 161             return isShutdown;
 162         }
 163 
 164         @Override
 165         public void execute(Runnable command) {
 166             command.run();
 167         }
 168     }
 169 }
 170