| /* |
| * Copyright (c) 2016, 2019, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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 jdk.jfr.internal.tool; |
| |
| import java.io.BufferedInputStream; |
| import java.io.DataInputStream; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.PrintStream; |
| import java.nio.file.Files; |
| import java.nio.file.InvalidPathException; |
| import java.nio.file.Path; |
| import java.util.ArrayList; |
| import java.util.Deque; |
| import java.util.List; |
| |
| import jdk.jfr.internal.consumer.ChunkHeader; |
| import jdk.jfr.internal.consumer.FileAccess; |
| import jdk.jfr.internal.consumer.RecordingInput; |
| |
| final class Disassemble extends Command { |
| |
| @Override |
| public String getName() { |
| return "disassemble"; |
| } |
| |
| @Override |
| public List<String> getOptionSyntax() { |
| List<String> list = new ArrayList<>(); |
| list.add("[--output <directory>]"); |
| list.add("[--max-chunks <chunks>]"); |
| list.add("[--max-size <size>]"); |
| list.add("<file>"); |
| return list; |
| } |
| |
| @Override |
| public void displayOptionUsage(PrintStream stream) { |
| stream.println(" --output <directory> The location to write the disassembled file,"); |
| stream.println(" by default the current directory"); |
| stream.println(""); |
| stream.println(" --max-chunks <chunks> Maximum number of chunks per disassembled file,"); |
| stream.println(" by default 5. The chunk size varies, but is "); |
| stream.println(" typically around 15 MB."); |
| stream.println(""); |
| stream.println(" --max-size <size> Maximum number of bytes per file."); |
| stream.println(""); |
| stream.println(" <file> Location of the recording file (.jfr)"); |
| } |
| |
| @Override |
| public String getDescription() { |
| return "Disassamble a recording file into smaller files/chunks"; |
| } |
| |
| @Override |
| public void execute(Deque<String> options) throws UserSyntaxException, UserDataException { |
| if (options.isEmpty()) { |
| throw new UserSyntaxException("missing file"); |
| } |
| Path file = getJFRInputFile(options); |
| int maxChunks = Integer.MAX_VALUE; |
| int maxsize = Integer.MAX_VALUE; |
| String output = System.getProperty("user.dir"); |
| int optionCount = options.size(); |
| while (optionCount > 0) { |
| if (acceptOption(options, "--output")) { |
| output = options.pop(); |
| } |
| if (acceptOption(options, "--max-size")) { |
| String value = options.pop(); |
| try { |
| maxsize = Integer.parseInt(value); |
| if (maxsize < 1) { |
| throw new UserDataException("max size must be at least 1"); |
| } |
| } catch (NumberFormatException nfe) { |
| throw new UserDataException("not a valid value for --max-size."); |
| } |
| } |
| if (acceptOption(options, "--max-chunks")) { |
| String value = options.pop(); |
| try { |
| maxChunks = Integer.parseInt(value); |
| if (maxChunks < 1) { |
| throw new UserDataException("max chunks must be at least 1."); |
| } |
| } catch (NumberFormatException nfe) { |
| throw new UserDataException("not a valid value for --max-size."); |
| } |
| } |
| if (optionCount == options.size()) { |
| // No progress made |
| throw new UserSyntaxException("unknown option " + options.peek()); |
| } |
| optionCount = options.size(); |
| } |
| Path outputPath = getDirectory(output); |
| |
| println(); |
| println("Examining recording " + file + " ..."); |
| List<Long> sizes; |
| if (maxsize != Integer.MAX_VALUE && maxChunks == Integer.MAX_VALUE) { |
| try { |
| long fileSize = Files.size(file); |
| if (maxsize >=fileSize) { |
| println(); |
| println("File size (" + fileSize +") does not exceed max size (" + maxsize + ")"); |
| return; |
| } |
| } catch (IOException e) { |
| throw new UserDataException("unexpected i/o error when determining file size" + e.getMessage()); |
| } |
| } |
| if (maxsize == Integer.MAX_VALUE && maxChunks == Integer.MAX_VALUE) { |
| maxChunks = 5; |
| } |
| |
| try { |
| sizes = findChunkSizes(file); |
| } catch (IOException e) { |
| throw new UserDataException("unexpected i/o error. " + e.getMessage()); |
| } |
| if (maxsize == Integer.MAX_VALUE == sizes.size() <= maxChunks) { |
| throw new UserDataException("number of chunks in recording (" + sizes.size() + ") doesn't exceed max chunks (" + maxChunks + ")"); |
| } |
| println(); |
| if (sizes.size() > 0) { |
| List<Long> combinedSizes = combineChunkSizes(sizes, maxChunks, maxsize); |
| print("File consists of " + sizes.size() + " chunks. The recording will be split into "); |
| println(combinedSizes.size() + " files"); |
| println(); |
| splitFile(outputPath, file, combinedSizes); |
| } else { |
| throw new UserDataException("no JFR chunks found in file."); |
| } |
| } |
| |
| private List<Long> findChunkSizes(Path p) throws IOException { |
| try (RecordingInput input = new RecordingInput(p.toFile(), FileAccess.UNPRIVILIGED)) { |
| List<Long> sizes = new ArrayList<>(); |
| ChunkHeader ch = new ChunkHeader(input); |
| sizes.add(ch.getSize()); |
| while (!ch.isLastChunk()) { |
| ch = ch.nextHeader(); |
| sizes.add(ch.getSize()); |
| } |
| return sizes; |
| } |
| } |
| |
| private List<Long> combineChunkSizes(List<Long> sizes, int maxChunks, long maxSize) { |
| List<Long> reduced = new ArrayList<Long>(); |
| int chunks = 1; |
| long fileSize = sizes.get(0); |
| for (int i = 1; i < sizes.size(); i++) { |
| long size = sizes.get(i); |
| if (fileSize + size > maxSize) { |
| reduced.add(fileSize); |
| chunks = 1; |
| fileSize = size; |
| continue; |
| } |
| fileSize += size; |
| if (chunks == maxChunks) { |
| reduced.add(fileSize); |
| fileSize = 0; |
| chunks = 1; |
| continue; |
| } |
| chunks++; |
| } |
| if (fileSize != 0) { |
| reduced.add(fileSize); |
| } |
| return reduced; |
| } |
| |
| private void splitFile(Path directory, Path file, List<Long> splitPositions) throws UserDataException { |
| int padAmountZeros = String.valueOf(splitPositions.size() - 1).length(); |
| String fileName = file.getFileName().toString(); |
| String fileFormatter = fileName.subSequence(0, fileName.length() - 4) + "_%0" + padAmountZeros + "d.jfr"; |
| for (int i = 0; i < splitPositions.size(); i++) { |
| String formattedFilename = String.format(fileFormatter, i); |
| try { |
| Path p = directory.resolve(formattedFilename); |
| if (Files.exists(p)) { |
| throw new UserDataException("can't create disassembled file " + p + ", a file with that name already exist"); |
| } |
| } catch (InvalidPathException ipe) { |
| throw new UserDataException("can't construct path with filename" + formattedFilename); |
| } |
| } |
| |
| try (DataInputStream stream = new DataInputStream(new BufferedInputStream(new FileInputStream(file.toFile())))) { |
| for (int i = 0; i < splitPositions.size(); i++) { |
| Long l = splitPositions.get(i); |
| byte[] bytes = readBytes(stream, l.intValue()); |
| String formattedFilename = String.format(fileFormatter, i); |
| Path p = directory.resolve(formattedFilename); |
| File splittedFile = p.toFile(); |
| println("Writing " + splittedFile + " ... " + bytes.length); |
| FileOutputStream fos = new FileOutputStream(splittedFile); |
| fos.write(bytes); |
| fos.close(); |
| } |
| } catch (IOException ioe) { |
| throw new UserDataException("i/o error writing file " + file); |
| } |
| } |
| |
| private byte[] readBytes(InputStream stream, int count) throws UserDataException, IOException { |
| byte[] data = new byte[count]; |
| int totalRead = 0; |
| while (totalRead < data.length) { |
| int read = stream.read(data, totalRead, data.length - totalRead); |
| if (read == -1) { |
| throw new UserDataException("unexpected end of data"); |
| } |
| totalRead += read; |
| } |
| return data; |
| } |
| } |