| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more contributor license |
| * agreements. See the NOTICE file distributed with this work for additional information regarding |
| * copyright ownership. The ASF licenses this file to You 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 org.apache.geode.codeAnalysis.decode; |
| |
| import java.io.DataInputStream; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.PrintStream; |
| import java.io.Serializable; |
| |
| import org.apache.geode.DataSerializable; |
| import org.apache.geode.LogWriter; |
| import org.apache.geode.codeAnalysis.decode.cp.Cp; |
| import org.apache.geode.codeAnalysis.decode.cp.CpClass; |
| import org.apache.geode.codeAnalysis.decode.cp.CpDouble; |
| import org.apache.geode.codeAnalysis.decode.cp.CpLong; |
| import org.apache.geode.internal.ExitCode; |
| import org.apache.geode.internal.logging.PureLogWriter; |
| import org.apache.geode.internal.serialization.DataSerializableFixedID; |
| |
| |
| /** |
| * Decoder represents a jdk ClassFile header |
| */ |
| |
| public class CompiledClass implements Comparable { |
| public long magic; |
| public int minor_version; |
| public int major_version; |
| public int constant_pool_count; |
| public Cp constant_pool[]; |
| public int access_flags; |
| public int this_class; // ptr into constant_pool |
| public int super_class; // ptr into constant_pool |
| public int interfaces_count; |
| public int interfaces[]; |
| public int fields_count; |
| public CompiledField fields[]; |
| public int methods_count; |
| public CompiledMethod methods[]; |
| public int attributes_count; |
| public CompiledAttribute attributes[]; |
| |
| static LogWriter debugLog; |
| static PrintStream debugStream; |
| |
| static { |
| try { |
| debugStream = new PrintStream("loadedClasses.log"); |
| debugLog = new PureLogWriter(PureLogWriter.ALL_LEVEL, debugStream); |
| } catch (FileNotFoundException e) { |
| e.printStackTrace(); |
| } |
| } |
| |
| public static CompiledClass getInstance(File classFile) throws IOException { |
| FileInputStream fstream = new FileInputStream(classFile); |
| DataInputStream source = new DataInputStream(fstream); |
| CompiledClass instance = new CompiledClass(source); |
| fstream.close(); |
| return instance; |
| } |
| |
| public static CompiledClass getInstance(InputStream classStream) throws IOException { |
| DataInputStream source = new DataInputStream(classStream); |
| CompiledClass instance = new CompiledClass(source); |
| classStream.close(); |
| return instance; |
| } |
| |
| /** |
| * read a ClassFile structure from the given input source (usually a file) |
| */ |
| public CompiledClass(DataInputStream source) throws IOException { |
| int idx; |
| |
| magic = (long) source.readInt(); |
| minor_version = source.readUnsignedShort(); |
| major_version = source.readUnsignedShort(); |
| // the first constant-pool slot is reserved by Java and is not in the classes file |
| constant_pool_count = source.readUnsignedShort(); |
| // read the constant pool list |
| constant_pool = new Cp[constant_pool_count]; |
| constant_pool[0] = null; |
| for (idx = 1; idx < constant_pool_count; idx++) { |
| constant_pool[idx] = Cp.readCp(source); |
| // from Venkatesh: workaround for Javasoft hack |
| // From the Java Virtual Machine Specification, |
| // all eight-byte constants take up two spots in the constant pool. |
| // If this is the nth item in the constant pool, then the next |
| // item will be numbered n+2. |
| if ((constant_pool[idx] instanceof CpLong) || (constant_pool[idx] instanceof CpDouble)) |
| idx++; |
| } |
| access_flags = source.readUnsignedShort(); |
| this_class = source.readUnsignedShort(); |
| super_class = source.readUnsignedShort(); |
| interfaces_count = source.readUnsignedShort(); |
| // read the interfaces list (ptrs into constant_pool) |
| interfaces = new int[interfaces_count]; |
| for (idx = 0; idx < interfaces_count; idx++) { |
| interfaces[idx] = source.readUnsignedShort(); |
| } |
| fields_count = source.readUnsignedShort(); |
| // read the fields list (only includes this class, not inherited variables) |
| fields = new CompiledField[fields_count]; |
| for (idx = 0; idx < fields_count; idx++) { |
| fields[idx] = new CompiledField(source, this); |
| } |
| methods_count = source.readUnsignedShort(); |
| // read the methods list |
| methods = new CompiledMethod[methods_count]; |
| for (idx = 0; idx < methods_count; idx++) { |
| methods[idx] = new CompiledMethod(source, this); |
| } |
| attributes_count = source.readUnsignedShort(); |
| // read the attributes |
| attributes = new CompiledAttribute[attributes_count]; |
| for (idx = 0; idx < attributes_count; idx++) { |
| attributes[idx] = new CompiledAttribute(source); |
| } |
| } |
| |
| String accessString() { |
| StringBuffer result; |
| |
| result = new StringBuffer(); |
| if ((access_flags & 0x0001) != 0) |
| result.append("public "); |
| if ((access_flags & 0x0002) != 0) |
| result.append("(private?) "); |
| if ((access_flags & 0x0004) != 0) |
| result.append("(protected?) "); |
| if ((access_flags & 0x0008) != 0) |
| result.append("(static?) "); |
| if ((access_flags & 0x0010) != 0) |
| result.append("final "); |
| if ((access_flags & 0x0020) != 0) |
| result.append("(??0x20??) "); |
| if ((access_flags & 0x0040) != 0) |
| result.append("(volatile?) "); |
| if ((access_flags & 0x0080) != 0) |
| result.append("(transient?) "); |
| if ((access_flags & 0x0100) != 0) |
| result = result.append("(??0x100??) "); |
| if ((access_flags & 0x0200) != 0) |
| result = result.append("interface "); |
| if ((access_flags & 0x0400) != 0) |
| result = result.append("abstract "); |
| if ((access_flags & 0x0800) != 0) |
| result = result.append("(??0x800??) "); |
| |
| return result.toString(); |
| } |
| |
| public boolean isInterface() { |
| return (access_flags & 0x0200) != 0; |
| } |
| |
| public boolean isSerializableAndNotDataSerializable() { |
| // these classes throw exceptions or log ugly messages when you try to load them |
| // in junit |
| String name = fullyQualifiedName().replace('/', '.'); |
| if (name.startsWith("org.apache.geode.internal.shared.NativeCallsJNAImpl") |
| || name.startsWith("org.apache.geode.internal.statistics.HostStatHelper")) { |
| return false; |
| } |
| try { |
| debugLog.info("isSerializableAndNotDataSerializable loading class " + name); |
| debugStream.flush(); |
| Class realClass = Class.forName(name); |
| return Serializable.class.isAssignableFrom(realClass) |
| && !DataSerializable.class.isAssignableFrom(realClass) |
| && !DataSerializableFixedID.class.isAssignableFrom(realClass); |
| } catch (UnsatisfiedLinkError e) { |
| System.out.println("Unable to load actual class " + name + " external JNI dependencies"); |
| } catch (NoClassDefFoundError e) { |
| System.out.println("Unable to load actual class " + name + " not in JUnit classpath"); |
| } catch (Throwable e) { |
| System.out.println("Unable to load actual class " + name + ": " + e); |
| } |
| return false; |
| } |
| |
| public String fullyQualifiedName() { |
| return ((CpClass) constant_pool[this_class]).className(this); |
| } |
| |
| public String superClassName() { |
| return ((CpClass) constant_pool[super_class]).className(this); |
| } |
| |
| @Override |
| public int compareTo(Object other) { |
| if (!(other instanceof CompiledClass)) { |
| return -1; |
| } |
| String otherName = ((CompiledClass) other).fullyQualifiedName(); |
| return this.fullyQualifiedName().compareTo(otherName); |
| } |
| |
| public static void main(String argv[]) { |
| File classFile; |
| CompiledClass instance; |
| int idx; |
| |
| classFile = null; |
| try { |
| classFile = new File(argv[0]); |
| } catch (NullPointerException e) { |
| System.err.println("You must give the name of a class file on the command line"); |
| System.exit(3); |
| } |
| if (!classFile.canRead()) { |
| System.err.println("Unable to read " + argv[0]); |
| System.exit(3); |
| } |
| try { |
| instance = getInstance(classFile); |
| System.out.println("Class name is " + instance.fullyQualifiedName()); |
| System.out.println("Class access is " + instance.accessString()); |
| System.out.println("Superclass name is " + instance.superClassName()); |
| System.out.println("Fields:"); |
| for (idx = 0; idx < instance.fields_count; idx++) { |
| System.out.println(" " + instance.fields[idx].signature()); |
| } |
| System.out.println("Methods:"); |
| for (idx = 0; idx < instance.methods_count; idx++) { |
| System.out.println(" " + instance.methods[idx].signature()); |
| // if (idx == 0) { |
| System.out.println("..method attributes"); |
| for (int i = 0; i < instance.methods[idx].attributes_count; i++) { |
| System.out.println(".." + instance.methods[idx].attributes[i].name(instance)); |
| } |
| // } |
| } |
| } catch (Throwable e) { |
| System.err.println("Error reading file: " + e.getMessage()); |
| System.exit(3); |
| } |
| ExitCode.NORMAL.doSystemExit(); |
| } |
| |
| } |