| /* |
| * Copyright (c) 2009, 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 com.sun.classanalyzer; |
| |
| import com.sun.classanalyzer.Klass.Method; |
| |
| import com.sun.tools.classfile.*; |
| import com.sun.tools.classfile.Instruction.*; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.TreeSet; |
| |
| /** |
| * |
| * @author Mandy Chung |
| */ |
| public class CodeAttributeParser { |
| private final ClassFileParser cfparser; |
| private final ConstantPool cpool; |
| private final ConstantPoolParser constantPoolParser; |
| |
| |
| static final Map<String, Set<Method>> runtimeReferences = |
| new HashMap<String, Set<Method>>(); |
| |
| |
| CodeAttributeParser(ClassFileParser parser) { |
| this.cfparser = parser; |
| this.cpool = cfparser.classfile.constant_pool; |
| this.constantPoolParser = cfparser.constantPoolParser; |
| } |
| |
| static boolean parseCodeAttribute = false; // by default don't parse code attribute |
| static void setParseCodeAttribute(boolean newValue) { |
| parseCodeAttribute = newValue; |
| } |
| |
| void parse(Code_attribute attr, Klass.Method method) { |
| if (!parseCodeAttribute) { |
| return; |
| } |
| |
| for (Instruction instr : attr.getInstructions()) { |
| try { |
| instr.accept(instructionVisitor, method); |
| } catch (ArrayIndexOutOfBoundsException e) { |
| throw new RuntimeException("error at or after byte " + instr.getPC()); |
| } |
| |
| } |
| |
| if (attr.exception_table_langth > 0) { |
| for (int i = 0; i < |
| attr.exception_table.length; i++) { |
| Code_attribute.Exception_data handler = attr.exception_table[i]; |
| int catch_type = handler.catch_type; |
| if (catch_type > 0) { |
| addMethodReference(catch_type, method); |
| } |
| |
| } |
| } |
| |
| } |
| |
| |
| private void addMethodReference(int index, Klass.Method m) { |
| String method = constantPoolParser.getMethodName(index); |
| |
| if (method != null && |
| (method.equals("java.lang.Class.forName") || |
| method.equals("java.lang.Class.loadClass") || |
| method.startsWith("java.util.ServiceLoader.load") || |
| method.equals("sun.misc.Service.providers"))) { |
| Set<Method> refs = runtimeReferences.get(method); |
| if (refs == null) { |
| refs = new TreeSet<Method>(); |
| runtimeReferences.put(method, refs); |
| } |
| refs.add(m); |
| } |
| } |
| |
| Instruction.KindVisitor<Void, Klass.Method> instructionVisitor = |
| new Instruction.KindVisitor<Void, Klass.Method>() { |
| |
| public Void visitNoOperands(Instruction instr, Klass.Method m) { |
| return null; |
| } |
| |
| public Void visitArrayType(Instruction instr, TypeKind kind, Klass.Method m) { |
| return null; |
| } |
| |
| public Void visitBranch(Instruction instr, int offset, Klass.Method m) { |
| return null; |
| } |
| |
| public Void visitConstantPoolRef(Instruction instr, int index, Klass.Method m) { |
| addMethodReference(index, m); |
| return null; |
| } |
| |
| public Void visitConstantPoolRefAndValue(Instruction instr, int index, int value, Klass.Method m) { |
| addMethodReference(index, m); |
| return null; |
| } |
| |
| public Void visitLocal(Instruction instr, int index, Klass.Method m) { |
| return null; |
| } |
| |
| public Void visitLocalAndValue(Instruction instr, int index, int value, Klass.Method m) { |
| return null; |
| } |
| |
| public Void visitLookupSwitch(Instruction instr, int default_, int npairs, int[] matches, int[] offsets, Klass.Method m) { |
| return null; |
| } |
| |
| public Void visitTableSwitch(Instruction instr, int default_, int low, int high, int[] offsets, Klass.Method m) { |
| return null; |
| } |
| |
| public Void visitValue(Instruction instr, int value, Klass.Method m) { |
| return null; |
| } |
| |
| public Void visitUnknown(Instruction instr, Klass.Method m) { |
| return null; |
| } |
| }; |
| } |