| /* |
| * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package lib.jdb; |
| |
| import jdk.test.lib.compiler.CompilerUtils; |
| import java.io.IOException; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| import java.text.MessageFormat; |
| import java.util.Arrays; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| import java.util.stream.Collectors; |
| |
| // ClassTransformer provides functionality to transform java source and compile it. |
| // We cannot use InMemoryJavaCompiler as test files usually contain 2 classes (the test itself and debuggee) |
| // and InMemoryJavaCompiler cannot compile them. |
| public class ClassTransformer { |
| |
| private final List<String> lines; |
| private String fileName; |
| private String workDir = "ver{0}"; |
| private static final String LINE_SEPARATOR = System.getProperty("line.separator"); |
| |
| private ClassTransformer(List<String> lines) { |
| this.lines = lines; |
| } |
| |
| public ClassTransformer setFileName(String fileName) { |
| this.fileName = fileName; |
| return this; |
| } |
| |
| // workDir is a MessageFormat pattern, id (int) is an {0} arg of the pattern. |
| // can be relative (relatively "scratch" dir) or absolute. |
| public ClassTransformer setWorkDir(String dir) { |
| workDir = dir; |
| return this; |
| } |
| |
| public static ClassTransformer fromString(String content) { |
| return new ClassTransformer(Arrays.asList(content.split("\\R"))); |
| } |
| |
| public static ClassTransformer fromFile(Path filePath) { |
| try { |
| return new ClassTransformer(Files.readAllLines(filePath)) |
| .setFileName(filePath.getFileName().toString()); |
| } catch (IOException e) { |
| throw new RuntimeException("failed to read " + filePath, e); |
| } |
| } |
| public static ClassTransformer fromFile(String filePath) { |
| return fromFile(Paths.get(filePath)); |
| } |
| |
| public static ClassTransformer fromTestSource(String fileName) { |
| return fromFile(Paths.get(System.getProperty("test.src")).resolve(fileName)); |
| } |
| |
| // returns path to the .class file of the transformed class |
| public String transform(int id, String className, String... compilerOptions) { |
| Path subdir = Paths.get(".").resolve(MessageFormat.format(workDir, id)); |
| Path transformedSrc = subdir.resolve(fileName); |
| try { |
| Files.createDirectories(subdir); |
| Files.write(transformedSrc, transform(id).getBytes()); |
| } catch (IOException e) { |
| throw new RuntimeException("failed to write transformed " + transformedSrc, e); |
| } |
| try { |
| // need to add extra classpath args |
| List<String> args = new LinkedList<>(Arrays.asList(compilerOptions)); |
| args.add("-cp"); |
| args.add(System.getProperty("java.class.path")); |
| CompilerUtils.compile(subdir, subdir, false, args.toArray(new String[args.size()])); |
| } catch (IOException e) { |
| throw new RuntimeException("failed to compile " + transformedSrc, e); |
| } |
| return subdir.resolve(className + ".class").toString(); |
| } |
| |
| /* |
| * To do RedefineClasses operations, embed @1 tags in the .java |
| * file to tell this script how to modify it to produce the 2nd |
| * version of the .class file to be used in the redefine operation. |
| * Here are examples of each editing tag and what change |
| * it causes in the new file. Note that blanks are not preserved |
| * in these editing operations. |
| * |
| * @1 uncomment |
| * orig: // @1 uncomment gus = 89; |
| * new: gus = 89; |
| * |
| * @1 commentout |
| * orig: gus = 89 // @1 commentout |
| * new: // gus = 89 // @1 commentout |
| * |
| * @1 delete |
| * orig: gus = 89 // @1 delete |
| * new: entire line deleted |
| * |
| * @1 newline |
| * orig: gus = 89; // @1 newline gus++; |
| * new: gus = 89; // |
| * gus++; |
| * |
| * @1 replace |
| * orig: gus = 89; // @1 replace gus = 90; |
| * new: gus = 90; |
| */ |
| public String transform(int id) { |
| Pattern delete = Pattern.compile("@" + id + " *delete"); |
| Pattern uncomment = Pattern.compile("// *@" + id + " *uncomment (.*)"); |
| Pattern commentout = Pattern.compile(".* @" + id + " *commentout"); |
| Pattern newline = Pattern.compile("(.*) @" + id + " *newline (.*)"); |
| Pattern replace = Pattern.compile("@" + id + " *replace (.*)"); |
| return lines.stream() |
| .filter(s -> !delete.matcher(s).find()) // @1 delete |
| .map(s -> { |
| Matcher m = uncomment.matcher(s); // @1 uncomment |
| return m.find() ? m.group(1) : s; |
| }) |
| .map(s-> { |
| Matcher m = commentout.matcher(s); // @1 commentout |
| return m.find() ? "//" + s : s; |
| }) |
| .map(s -> { |
| Matcher m = newline.matcher(s); // @1 newline |
| return m.find() ? m.group(1) + LINE_SEPARATOR + m.group(2) : s; |
| }) |
| .map(s -> { |
| Matcher m = replace.matcher(s); // @1 replace |
| return m.find() ? m.group(1) : s; |
| }) |
| .collect(Collectors.joining(LINE_SEPARATOR)); |
| } |
| |
| } |