public virtual void Init()
{
DecompilerContext.SetProperty(DecompilerContext.Current_Class, classStruct);
DecompilerContext.SetProperty(DecompilerContext.Current_Class_Wrapper, this);
DecompilerContext.GetLogger().StartClass(classStruct.qualifiedName);
int maxSec = System.Convert.ToInt32(DecompilerContext.GetProperty(IFernflowerPreferences
.Max_Processing_Method).ToString());
bool testMode = DecompilerContext.GetOption(IFernflowerPreferences.Unit_Test_Mode
);
foreach (StructMethod mt in classStruct.GetMethods())
{
DecompilerContext.GetLogger().StartMethod(mt.GetName() + " " + mt.GetDescriptor()
);
MethodDescriptor md = MethodDescriptor.ParseDescriptor(mt.GetDescriptor());
VarProcessor varProc = new VarProcessor(mt, md);
DecompilerContext.StartMethod(varProc);
VarNamesCollector vc = varProc.GetVarNamesCollector();
CounterContainer counter = DecompilerContext.GetCounterContainer();
RootStatement root = null;
bool isError = false;
try
{
if (mt.ContainsCode())
{
if (maxSec == 0 || testMode)
{
root = MethodProcessorRunnable.CodeToJava(mt, md, varProc);
}
else
{
MethodProcessorRunnable mtProc = new MethodProcessorRunnable(mt, md, varProc, DecompilerContext
.GetCurrentContext());
Thread mtThread = new Thread(o => mtProc.Run())
{
Name = "Java decompiler"
};
long stopAt = Runtime.CurrentTimeMillis() + maxSec * 1000L;
mtThread.Start();
while (!mtProc.IsFinished())
{
try
{
lock (mtProc.Lock)
{
Thread.Sleep(200);
}
}
catch (Exception e)
{
KillThread(mtThread);
throw;
}
if (Runtime.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
{
bool thisVar = !mt.HasModifier(ICodeConstants.Acc_Static);
int paramCount = 0;
if (thisVar)
{
Sharpen.Collections.Put(varProc.GetThisVars(), new VarVersionPair(0, 0), classStruct
.qualifiedName);
paramCount = 1;
}
paramCount += [email protected];
int varIndex = 0;
for (int i = 0; i < paramCount; i++)
{
varProc.SetVarName(new VarVersionPair(varIndex, 0), vc.GetFreeName(varIndex));
if (thisVar)
{
if (i == 0)
{
varIndex++;
}
else
{
varIndex += md.@params[i - 1].stackSize;
}
}
else
{
varIndex += md.@params[i].stackSize;
}
}
}
}
catch (Exception t)
{
string message = "Method " + mt.GetName() + " " + mt.GetDescriptor() + " couldn't be decompiled.";
DecompilerContext.GetLogger().WriteMessage(message, IFernflowerLogger.Severity.Warn
, t);
isError = true;
}
MethodWrapper methodWrapper = new MethodWrapper(root, varProc, mt, counter);
methodWrapper.decompiledWithErrors = isError;
methods.AddWithKey(methodWrapper, InterpreterUtil.MakeUniqueKey(mt.GetName(), mt.
GetDescriptor()));
if (!isError)
{
// rename vars so that no one has the same name as a field
VarNamesCollector namesCollector = new VarNamesCollector();
classStruct.GetFields().ForEach((StructField f) => namesCollector.AddName(f.GetName
()));
varProc.RefreshVarNames(namesCollector);
// if debug information present and should be used
if (DecompilerContext.GetOption(IFernflowerPreferences.Use_Debug_Var_Names))
{
StructLocalVariableTableAttribute attr = mt.GetLocalVariableAttr();
if (attr != null)
{
// only param names here
varProc.SetDebugVarNames(attr.GetMapParamNames());
// the rest is here
methodWrapper.GetOrBuildGraph().IterateExprents((Exprent exprent) => {
List <Exprent> lst = exprent.GetAllExprents(true);
lst.Add(exprent);
lst.Where(e => e.type == Exprent.Exprent_Var).ToList().ForEach((Exprent
e) => {
VarExprent varExprent = (VarExprent)e;
string name = varExprent.GetDebugName(mt);
if (name != null)
{
varProc.SetVarName(varExprent.GetVarVersionPair(), name);
}
}
);
return(0);
}
);
}
}
}
DecompilerContext.GetLogger().EndMethod();
}
DecompilerContext.GetLogger().EndClass();
}
private static bool IsAnonymous(StructClass cl, StructClass enclosingCl)
{
// checking super class and interfaces
int[] interfaces = cl.GetInterfaces();
if (interfaces.Length > 0)
{
bool hasNonTrivialSuperClass = cl.superClass != null && !VarType.Vartype_Object.Equals
(new VarType(cl.superClass.GetString(), true));
if (hasNonTrivialSuperClass || interfaces.Length > 1)
{
// can't have multiple 'sources'
string message = "Inconsistent anonymous class definition: '" + cl.qualifiedName
+ "'. Multiple interfaces and/or super class defined.";
DecompilerContext.GetLogger().WriteMessage(message, IFernflowerLogger.Severity.Warn
);
return(false);
}
}
else if (cl.superClass == null)
{
// neither interface nor super class defined
string message = "Inconsistent anonymous class definition: '" + cl.qualifiedName
+ "'. Neither interface nor super class defined.";
DecompilerContext.GetLogger().WriteMessage(message, IFernflowerLogger.Severity.Warn
);
return(false);
}
// FIXME: check constructors
// FIXME: check enclosing class/method
ConstantPool pool = enclosingCl.GetPool();
int refCounter = 0;
bool refNotNew = false;
StructEnclosingMethodAttribute attribute = cl.GetAttribute(StructGeneralAttribute
.Attribute_Enclosing_Method);
string enclosingMethod = attribute != null?attribute.GetMethodName() : null;
// checking references in the enclosing class
foreach (StructMethod mt in enclosingCl.GetMethods())
{
if (enclosingMethod != null && !enclosingMethod.Equals(mt.GetName()))
{
continue;
}
try
{
mt.ExpandData();
InstructionSequence seq = mt.GetInstructionSequence();
if (seq != null)
{
int len = seq.Length();
for (int i = 0; i < len; i++)
{
Instruction instr = seq.GetInstr(i);
switch (instr.opcode)
{
case opc_checkcast:
case opc_instanceof:
{
if (cl.qualifiedName.Equals(pool.GetPrimitiveConstant(instr.Operand(0)).GetString
()))
{
refCounter++;
refNotNew = true;
}
break;
}
case opc_new:
case opc_anewarray:
case opc_multianewarray:
{
if (cl.qualifiedName.Equals(pool.GetPrimitiveConstant(instr.Operand(0)).GetString
()))
{
refCounter++;
}
break;
}
case opc_getstatic:
case opc_putstatic:
{
if (cl.qualifiedName.Equals(pool.GetLinkConstant(instr.Operand(0)).classname))
{
refCounter++;
refNotNew = true;
}
break;
}
}
}
}
mt.ReleaseResources();
}
catch (IOException)
{
string message = "Could not read method while checking anonymous class definition: '"
+ enclosingCl.qualifiedName + "', '" + InterpreterUtil.MakeUniqueKey(mt.GetName
(), mt.GetDescriptor()) + "'";
DecompilerContext.GetLogger().WriteMessage(message, IFernflowerLogger.Severity.Warn
);
return(false);
}
if (refCounter > 1 || refNotNew)
{
string message = "Inconsistent references to the class '" + cl.qualifiedName + "' which is supposed to be anonymous";
DecompilerContext.GetLogger().WriteMessage(message, IFernflowerLogger.Severity.Warn
);
return(false);
}
}
return(true);
}
private BitSet GetAmbiguousParameters()
{
StructClass cl = DecompilerContext.GetStructContext().GetClass(classname);
if (cl == null)
{
return(Empty_Bit_Set);
}
// check number of matches
List <MethodDescriptor> matches = new List <MethodDescriptor>();
foreach (StructMethod mt in cl.GetMethods())
{
if (name.Equals(mt.GetName()))
{
MethodDescriptor md = MethodDescriptor.ParseDescriptor(mt.GetDescriptor());
if ([email protected] == [email protected])
{
for (int i = 0; i < [email protected]; i++)
{
if (md.@params[i].typeFamily != descriptor.@params[i].typeFamily)
{
goto nextMethod_continue;
}
}
matches.Add(md);
}
}
}
nextMethod_break :;
nextMethod_continue :
if (matches.Count == 1)
{
return(Empty_Bit_Set);
}
// check if a call is unambiguous
StructMethod mt_1 = cl.GetMethod(InterpreterUtil.MakeUniqueKey(name, stringDescriptor
));
if (mt_1 != null)
{
MethodDescriptor md = MethodDescriptor.ParseDescriptor(mt_1.GetDescriptor());
if ([email protected] == lstParameters.Count)
{
bool exact = true;
for (int i = 0; i < [email protected]; i++)
{
if (!md.@params[i].Equals(lstParameters[i].GetExprType()))
{
exact = false;
break;
}
}
if (exact)
{
return(Empty_Bit_Set);
}
}
}
// mark parameters
BitSet ambiguous = new BitSet([email protected]);
for (int i = 0; i < [email protected]; i++)
{
VarType paramType = descriptor.@params[i];
foreach (MethodDescriptor md in matches)
{
if (!paramType.Equals(md.@params[i]))
{
ambiguous.Set(i);
break;
}
}
}
return(ambiguous);
}
private void RenameClassIdentifiers(StructClass cl, Dictionary <string, string> names
)
{
// all classes are already renamed
string classOldFullName = cl.qualifiedName;
string classNewFullName = interceptor.GetName(classOldFullName);
if (classNewFullName == null)
{
classNewFullName = classOldFullName;
}
// methods
HashSet <string> setMethodNames = new HashSet <string>();
foreach (StructMethod md in cl.GetMethods())
{
setMethodNames.Add(md.GetName());
}
VBStyleCollection <StructMethod, string> methods = cl.GetMethods();
for (int i = 0; i < methods.Count; i++)
{
StructMethod mt = methods[i];
string key = methods.GetKey(i);
bool isPrivate = mt.HasModifier(ICodeConstants.Acc_Private);
string name = mt.GetName();
if (!cl.IsOwn() || mt.HasModifier(ICodeConstants.Acc_Native))
{
// external and native methods must not be renamed
if (!isPrivate)
{
Sharpen.Collections.Put(names, key, name);
}
}
else if (helper.ToBeRenamed(IIdentifierRenamer.Type.Element_Method, classOldFullName
, name, mt.GetDescriptor()))
{
if (isPrivate || !names.ContainsKey(key))
{
do
{
name = helper.GetNextMethodName(classOldFullName, name, mt.GetDescriptor());
}while (setMethodNames.Contains(name));
if (!isPrivate)
{
Sharpen.Collections.Put(names, key, name);
}
}
else
{
name = names.GetOrNull(key);
}
interceptor.AddName(classOldFullName + " " + mt.GetName() + " " + mt.GetDescriptor
(), classNewFullName + " " + name + " " + BuildNewDescriptor(false, mt.GetDescriptor
()));
}
}
// external fields are not being renamed
if (!cl.IsOwn())
{
return;
}
// fields
// FIXME: should overloaded fields become the same name?
HashSet <string> setFieldNames = new HashSet <string>();
foreach (StructField fd in cl.GetFields())
{
setFieldNames.Add(fd.GetName());
}
foreach (StructField fd in cl.GetFields())
{
if (helper.ToBeRenamed(IIdentifierRenamer.Type.Element_Field, classOldFullName, fd
.GetName(), fd.GetDescriptor()))
{
string newName;
do
{
newName = helper.GetNextFieldName(classOldFullName, fd.GetName(), fd.GetDescriptor
());
}while (setFieldNames.Contains(newName));
interceptor.AddName(classOldFullName + " " + fd.GetName() + " " + fd.GetDescriptor
(), classNewFullName + " " + newName + " " + BuildNewDescriptor(true, fd.GetDescriptor
()));
}
}
}
/// <exception cref="IOException"/>
public virtual void ProcessClass(ClassesProcessor.ClassNode node)
{
foreach (ClassesProcessor.ClassNode child in node.nested)
{
ProcessClass(child);
}
ClassesProcessor clProcessor = DecompilerContext.GetClassProcessor();
StructClass cl = node.classStruct;
if (cl.GetBytecodeVersion() < ICodeConstants.Bytecode_Java_8)
{
// lambda beginning with Java 8
return;
}
StructBootstrapMethodsAttribute bootstrap = cl.GetAttribute(StructGeneralAttribute
.Attribute_Bootstrap_Methods);
if (bootstrap == null || bootstrap.GetMethodsNumber() == 0)
{
return;
}
// no bootstrap constants in pool
BitSet lambda_methods = new BitSet();
// find lambda bootstrap constants
for (int i = 0; i < bootstrap.GetMethodsNumber(); ++i)
{
LinkConstant method_ref = bootstrap.GetMethodReference(i);
// method handle
// FIXME: extend for Eclipse etc. at some point
if (Javac_Lambda_Class.Equals(method_ref.classname) && (Javac_Lambda_Method.Equals
(method_ref.elementname) || Javac_Lambda_Alt_Method.Equals(method_ref.elementname
)))
{
lambda_methods.Set(i);
}
}
if (lambda_methods.IsEmpty())
{
return;
}
// no lambda bootstrap constant found
Dictionary <string, string> mapMethodsLambda = new Dictionary <string, string>();
// iterate over code and find invocations of bootstrap methods. Replace them with anonymous classes.
foreach (StructMethod mt in cl.GetMethods())
{
mt.ExpandData();
InstructionSequence seq = mt.GetInstructionSequence();
if (seq != null && seq.Length() > 0)
{
int len = seq.Length();
for (int i = 0; i < len; ++i)
{
Instruction instr = seq.GetInstr(i);
if (instr.opcode == ICodeConstants.opc_invokedynamic)
{
LinkConstant invoke_dynamic = cl.GetPool().GetLinkConstant(instr.Operand(0));
if (lambda_methods.Get(invoke_dynamic.index1))
{
// lambda invocation found
List <PooledConstant> bootstrap_arguments = bootstrap.GetMethodArguments(invoke_dynamic
.index1);
MethodDescriptor md = MethodDescriptor.ParseDescriptor(invoke_dynamic.descriptor);
string lambda_class_name = md.ret.value;
string lambda_method_name = invoke_dynamic.elementname;
string lambda_method_descriptor = ((PrimitiveConstant)bootstrap_arguments[2]).GetString
();
// method type
LinkConstant content_method_handle = (LinkConstant)bootstrap_arguments[1];
ClassesProcessor.ClassNode node_lambda = new ClassesProcessor.ClassNode(content_method_handle
.classname, content_method_handle.elementname, content_method_handle.descriptor,
content_method_handle.index1, lambda_class_name, lambda_method_name, lambda_method_descriptor
, cl);
node_lambda.simpleName = cl.qualifiedName + "##Lambda_" + invoke_dynamic.index1 +
"_" + invoke_dynamic.index2;
node_lambda.enclosingMethod = InterpreterUtil.MakeUniqueKey(mt.GetName(), mt.GetDescriptor
());
node.nested.Add(node_lambda);
node_lambda.parent = node;
Sharpen.Collections.Put(clProcessor.GetMapRootClasses(), node_lambda.simpleName,
node_lambda);
if (!node_lambda.lambdaInformation.is_method_reference)
{
Sharpen.Collections.Put(mapMethodsLambda, node_lambda.lambdaInformation.content_method_key
, node_lambda.simpleName);
}
}
}
}
}
mt.ReleaseResources();
}
// build class hierarchy on lambda
foreach (ClassesProcessor.ClassNode nd in node.nested)
{
if (nd.type == ClassesProcessor.ClassNode.Class_Lambda)
{
string parent_class_name = mapMethodsLambda.GetOrNull(nd.enclosingMethod);
if (parent_class_name != null)
{
ClassesProcessor.ClassNode parent_class = clProcessor.GetMapRootClasses().GetOrNull
(parent_class_name);
parent_class.nested.Add(nd);
nd.parent = parent_class;
}
}
}
}