1 /*
   2  * Copyright (c) 2016, 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 jdk.test.lib.jittester;
  25 
  26 import jdk.test.lib.jittester.visitors.ByteCodeVisitor;
  27 
  28 import java.io.FileOutputStream;
  29 import java.io.FileWriter;
  30 import java.io.IOException;
  31 import java.io.PrintWriter;
  32 import java.nio.file.Files;
  33 import java.nio.file.Path;
  34 import java.nio.file.Paths;
  35 import java.nio.file.StandardOpenOption;
  36 import java.util.function.BiFunction;
  37 
  38 /**
  39  * Generates class files from bytecode
  40  */
  41 class ByteCodeGenerator implements BiFunction<IRNode, IRNode, String> {
  42     private final Path testbase = Paths.get(ProductionParams.testbaseDir.value(),
  43             "bytecode_tests");
  44 
  45     public void writeJtregBytecodeRunner(String name) {
  46         try (FileWriter file = new FileWriter(testbase.resolve(name + ".java").toFile())) {
  47             file.write(Automatic.getJtregHeader(name, false));
  48         } catch (IOException e) {
  49             e.printStackTrace();
  50         }
  51     }
  52 
  53     public String apply(IRNode mainClass, IRNode privateClasses) {
  54         Automatic.ensureExisting(testbase);
  55         try {
  56             ByteCodeVisitor vis = new ByteCodeVisitor();
  57             if (privateClasses != null) {
  58                 privateClasses.accept(vis);
  59             }
  60             mainClass.accept(vis);
  61 
  62             Path mainClassPath = testbase.resolve(mainClass.getName() + ".class");
  63             writeToClassFile(mainClassPath, vis.getByteCode(mainClass.getName()));
  64             if (privateClasses != null) {
  65                 privateClasses.getChildren().forEach(c -> {
  66                     String name = c.getName();
  67                     Path classPath = testbase.resolve(name + ".class");
  68                     writeToClassFile(classPath, vis.getByteCode(name));
  69                 });
  70             }
  71             return mainClassPath.toString();
  72         } catch (Throwable t) {
  73             Path errFile = testbase.resolve(mainClass.getName() + ".err");
  74             try (PrintWriter pw = new PrintWriter(Files.newOutputStream(errFile,
  75                     StandardOpenOption.CREATE_NEW))) {
  76                 t.printStackTrace(pw);
  77             } catch (IOException e) {
  78                 t.printStackTrace();
  79                 throw new Error("can't write error to error file " + errFile, e);
  80             }
  81             return null;
  82         }
  83     }
  84 
  85     public Path getTestbase() {
  86         return testbase;
  87     }
  88 
  89     private void writeToClassFile(Path path, byte[] bytecode) {
  90         try (FileOutputStream file = new FileOutputStream(path.toString())) {
  91             file.write(bytecode);
  92         } catch (IOException ex) {
  93             ex.printStackTrace();
  94         }
  95     }
  96 }