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/*
* Copyright 2000-2014 JetBrains s.r.o.
*
* 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 org.jetbrains.java.decompiler.main.rels;
import org.jetbrains.java.decompiler.code.CodeConstants;
import org.jetbrains.java.decompiler.main.DecompilerContext;
import org.jetbrains.java.decompiler.main.collectors.CounterContainer;
import org.jetbrains.java.decompiler.main.collectors.VarNamesCollector;
import org.jetbrains.java.decompiler.main.extern.IFernflowerLogger;
import org.jetbrains.java.decompiler.main.extern.IFernflowerPreferences;
import org.jetbrains.java.decompiler.modules.decompiler.exps.Exprent;
import org.jetbrains.java.decompiler.modules.decompiler.stats.RootStatement;
import org.jetbrains.java.decompiler.modules.decompiler.vars.VarProcessor;
import org.jetbrains.java.decompiler.modules.decompiler.vars.VarVersionPaar;
import org.jetbrains.java.decompiler.struct.StructClass;
import org.jetbrains.java.decompiler.struct.StructField;
import org.jetbrains.java.decompiler.struct.StructMethod;
import org.jetbrains.java.decompiler.struct.attr.StructGeneralAttribute;
import org.jetbrains.java.decompiler.struct.attr.StructLocalVariableTableAttribute;
import org.jetbrains.java.decompiler.struct.gen.MethodDescriptor;
import org.jetbrains.java.decompiler.util.InterpreterUtil;
import org.jetbrains.java.decompiler.util.VBStyleCollection;
import java.io.IOException;
import java.util.HashSet;
import java.util.Set;
public class ClassWrapper {
private StructClass classStruct;
private Set<String> hiddenMembers = new HashSet<String>();
private VBStyleCollection<Exprent, String> staticFieldInitializers = new VBStyleCollection<Exprent, String>();
private VBStyleCollection<Exprent, String> dynamicFieldInitializers = new VBStyleCollection<Exprent, String>();
private VBStyleCollection<MethodWrapper, String> methods = new VBStyleCollection<MethodWrapper, String>();
public ClassWrapper(StructClass classStruct) {
this.classStruct = classStruct;
}
public void init() throws IOException {
DecompilerContext.setProperty(DecompilerContext.CURRENT_CLASS, classStruct);
DecompilerContext.getLogger().startClass(classStruct.qualifiedName);
// collect field names
HashSet<String> setFieldNames = new HashSet<String>();
for (StructField fd : classStruct.getFields()) {
setFieldNames.add(fd.getName());
}
int maxsec = Integer.parseInt(DecompilerContext.getProperty(IFernflowerPreferences.MAX_PROCESSING_METHOD).toString());
for (StructMethod mt : classStruct.getMethods()) {
DecompilerContext.getLogger().startMethod(mt.getName() + " " + mt.getDescriptor());
VarNamesCollector vc = new VarNamesCollector();
DecompilerContext.setVarNamesCollector(vc);
CounterContainer counter = new CounterContainer();
DecompilerContext.setCounterContainer(counter);
DecompilerContext.setProperty(DecompilerContext.CURRENT_METHOD, mt);
DecompilerContext.setProperty(DecompilerContext.CURRENT_METHOD_DESCRIPTOR, MethodDescriptor.parseDescriptor(mt.getDescriptor()));
VarProcessor varproc = new VarProcessor();
DecompilerContext.setProperty(DecompilerContext.CURRENT_VAR_PROCESSOR, varproc);
RootStatement root = null;
boolean isError = false;
try {
if (mt.containsCode()) {
if (maxsec == 0) { // blocking wait
root = MethodProcessorThread.codeToJava(mt, varproc);
}
else {
MethodProcessorThread mtproc = new MethodProcessorThread(mt, varproc, DecompilerContext.getCurrentContext());
Thread mtthread = new Thread(mtproc);
long stopAt = System.currentTimeMillis() + maxsec * 1000;
mtthread.start();
while (mtthread.isAlive()) {
synchronized (mtproc.lock) {
mtproc.lock.wait(100);
}
if (System.currentTimeMillis() >= stopAt) {
String message = "Processing time limit exceeded for method " + mt.getName() + ", execution interrupted.";
DecompilerContext.getLogger().writeMessage(message, IFernflowerLogger.Severity.ERROR);
killThread(mtthread);
isError = true;
break;
}
}
if (!isError) {
root = mtproc.getResult();
}
}
}
else {
boolean thisvar = !mt.hasModifier(CodeConstants.ACC_STATIC);
MethodDescriptor md = MethodDescriptor.parseDescriptor(mt.getDescriptor());
int paramcount = 0;
if (thisvar) {
varproc.getThisvars().put(new VarVersionPaar(0, 0), classStruct.qualifiedName);
paramcount = 1;
}
paramcount += md.params.length;
int varindex = 0;
for (int i = 0; i < paramcount; i++) {
varproc.setVarName(new VarVersionPaar(varindex, 0), vc.getFreeName(varindex));
if (thisvar) {
if (i == 0) {
varindex++;
}
else {
varindex += md.params[i - 1].stack_size;
}
}
else {
varindex += md.params[i].stack_size;
}
}
}
}
catch (Throwable ex) {
DecompilerContext.getLogger().writeMessage("Method " + mt.getName() + " " + mt.getDescriptor() + " couldn't be decompiled.", ex);
isError = true;
}
MethodWrapper meth = new MethodWrapper(root, varproc, mt, counter);
meth.decompiledWithErrors = isError;
methods.addWithKey(meth, InterpreterUtil.makeUniqueKey(mt.getName(), mt.getDescriptor()));
// rename vars so that no one has the same name as a field
varproc.refreshVarNames(new VarNamesCollector(setFieldNames));
// if debug information present and should be used
if (DecompilerContext.getOption(IFernflowerPreferences.USE_DEBUG_VAR_NAMES)) {
StructLocalVariableTableAttribute attr = (StructLocalVariableTableAttribute)mt.getAttributes().getWithKey(
StructGeneralAttribute.ATTRIBUTE_LOCAL_VARIABLE_TABLE);
if (attr != null) {
varproc.setDebugVarNames(attr.getMapVarNames());
}
}
DecompilerContext.getLogger().endMethod();
}
DecompilerContext.getLogger().endClass();
}
@SuppressWarnings("deprecation")
private static void killThread(Thread thread) {
thread.stop();
}
public MethodWrapper getMethodWrapper(String name, String descriptor) {
return methods.getWithKey(InterpreterUtil.makeUniqueKey(name, descriptor));
}
public StructClass getClassStruct() {
return classStruct;
}
public VBStyleCollection<MethodWrapper, String> getMethods() {
return methods;
}
public Set<String> getHiddenMembers() {
return hiddenMembers;
}
public VBStyleCollection<Exprent, String> getStaticFieldInitializers() {
return staticFieldInitializers;
}
public VBStyleCollection<Exprent, String> getDynamicFieldInitializers() {
return dynamicFieldInitializers;
}
}
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