| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package dalvik.system.profiler; |
| |
| import java.io.BufferedInputStream; |
| import java.io.Closeable; |
| import java.io.DataInputStream; |
| import java.io.EOFException; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| /** |
| * Run on device with: |
| * adb shell dalvikvm 'dalvik.system.profiler.HprofBinaryToAscii' |
| * |
| * Run on host with: |
| * java -classpath out/target/common/obj/JAVA_LIBRARIES/core_intermediates/classes.jar |
| */ |
| public final class HprofBinaryToAscii { |
| |
| /** |
| * Main entry point for HprofBinaryToAscii command line tool |
| */ |
| public static void main(String[] args) { |
| System.exit(convert(args) ? 0 : 1); |
| } |
| |
| /** |
| * Reads single file from arguments and attempts to read it as |
| * either a binary hprof file or a version with a text header. |
| */ |
| private static boolean convert(String[] args) { |
| |
| if (args.length != 1) { |
| usage("binary hprof file argument expected"); |
| return false; |
| } |
| File file = new File(args[0]); |
| if (!file.exists()) { |
| usage("file " + file + " does not exist"); |
| return false; |
| } |
| |
| if (startsWithMagic(file)) { |
| HprofData hprofData; |
| try { |
| hprofData = readHprof(file); |
| } catch (IOException e) { |
| System.out.println("Problem reading binary hprof data from " |
| + file + ": " + e.getMessage()); |
| return false; |
| } |
| return write(hprofData); |
| } |
| |
| HprofData hprofData; |
| try { |
| hprofData = readSnapshot(file); |
| } catch (IOException e) { |
| System.out.println("Problem reading snapshot containing binary hprof data from " |
| + file + ": " + e.getMessage()); |
| return false; |
| } |
| return write(hprofData); |
| } |
| |
| /** |
| * Probe the start of file to see if it starts with a plausible |
| * binary hprof magic value. If so, it is returned. On any other |
| * case including unexpected errors, false is returned. |
| */ |
| private static boolean startsWithMagic(File file) { |
| DataInputStream inputStream = null; |
| try { |
| inputStream = new DataInputStream(new BufferedInputStream(new FileInputStream(file))); |
| return BinaryHprof.readMagic(inputStream) != null; |
| } catch (IOException e) { |
| return false; |
| } finally { |
| closeQuietly(inputStream); |
| } |
| } |
| |
| /** |
| * Read and return an HprofData from a vanilla binary hprof file. |
| */ |
| private static HprofData readHprof(File file) throws IOException { |
| InputStream inputStream = null; |
| try { |
| inputStream = new BufferedInputStream(new FileInputStream(file)); |
| return read(inputStream); |
| } finally { |
| closeQuietly(inputStream); |
| } |
| } |
| |
| /** |
| * Read a file looking for text header terminated by two newlines, |
| * then proceed to read binary hprof data. |
| */ |
| private static HprofData readSnapshot(File file) throws IOException { |
| InputStream inputStream = null; |
| try { |
| inputStream = new BufferedInputStream(new FileInputStream(file)); |
| int ch; |
| while ((ch = inputStream.read()) != -1) { |
| if (ch == '\n' && inputStream.read() == '\n') { |
| return read(inputStream); |
| } |
| } |
| throw new EOFException("Could not find expected header"); |
| } finally { |
| closeQuietly(inputStream); |
| } |
| } |
| |
| /** |
| * Read binary hprof data from the provided input stream and |
| * return the HprofData object. |
| */ |
| private static HprofData read(InputStream inputStream) throws IOException { |
| BinaryHprofReader reader = new BinaryHprofReader(inputStream); |
| reader.setStrict(false); |
| reader.read(); |
| return reader.getHprofData(); |
| } |
| |
| /** |
| * From IoUtils.closeQuietly but replicated for open source |
| * version. |
| */ |
| private static void closeQuietly(Closeable c) { |
| if (c != null) { |
| try { |
| c.close(); |
| } catch (IOException ignored) { |
| } |
| } |
| } |
| |
| /** |
| * Write text verion of hprof data to standard output. Returns |
| * false on error. |
| */ |
| private static boolean write(HprofData hprofData) { |
| try { |
| AsciiHprofWriter.write(hprofData, System.out); |
| } catch (IOException e) { |
| System.out.println("Problem writing ASCII hprof data: " + e.getMessage()); |
| return false; |
| } |
| return true; |
| } |
| |
| /** |
| * Prints usage error but does not exit. |
| */ |
| private static void usage(String error) { |
| System.out.print("ERROR: "); |
| System.out.println(error); |
| System.out.println(); |
| System.out.println("usage: HprofBinaryToAscii <binary-hprof-file>"); |
| System.out.println(); |
| System.out.println("Reads a binary hprof file and print it in ASCII format"); |
| } |
| } |