public virtual void RefreshVarNames(VarNamesCollector vc)
{
Dictionary <VarVersionPair, string> tempVarNames = new Dictionary <VarVersionPair,
string>(mapVarNames);
foreach (KeyValuePair <VarVersionPair, string> ent in tempVarNames)
{
Sharpen.Collections.Put(mapVarNames, ent.Key, vc.GetFreeName(ent.Value));
}
}
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();
}
public VarDefinitionHelper(Statement root, StructMethod mt, VarProcessor varproc)
{
// statement.id, defined vars
mapVarDefStatements = new Dictionary <int, Statement>();
mapStatementVars = new Dictionary <int, HashSet <int> >();
implDefVars = new HashSet <int>();
this.varproc = varproc;
VarNamesCollector vc = varproc.GetVarNamesCollector();
bool thisvar = !mt.HasModifier(ICodeConstants.Acc_Static);
MethodDescriptor md = MethodDescriptor.ParseDescriptor(mt.GetDescriptor());
int paramcount = 0;
if (thisvar)
{
paramcount = 1;
}
paramcount += [email protected];
// method parameters are implicitly defined
int varindex = 0;
for (int i = 0; i < paramcount; i++)
{
implDefVars.Add(varindex);
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;
}
}
if (thisvar)
{
StructClass current_class = (StructClass)DecompilerContext.GetProperty(DecompilerContext
.Current_Class);
Sharpen.Collections.Put(varproc.GetThisVars(), new VarVersionPair(0, 0), current_class
.qualifiedName);
varproc.SetVarName(new VarVersionPair(0, 0), "this");
vc.AddName("this");
}
// catch variables are implicitly defined
LinkedList <Statement> stack = new LinkedList <Statement>();
stack.AddLast(root);
while (!(stack.Count == 0))
{
Statement st = Sharpen.Collections.RemoveFirst(stack);
List <VarExprent> lstVars = null;
if (st.type == Statement.Type_Catchall)
{
lstVars = ((CatchAllStatement)st).GetVars();
}
else if (st.type == Statement.Type_Trycatch)
{
lstVars = ((CatchStatement)st).GetVars();
}
if (lstVars != null)
{
foreach (VarExprent var in lstVars)
{
implDefVars.Add(var.GetIndex());
varproc.SetVarName(new VarVersionPair(var), vc.GetFreeName(var.GetIndex()));
var.SetDefinition(true);
}
}
Sharpen.Collections.AddAll(stack, st.GetStats());
}
InitStatement(root);
}
private Exprent ReplaceAccessExprent(ClassesProcessor.ClassNode caller, MethodWrapper
methdest, InvocationExprent invexpr)
{
ClassesProcessor.ClassNode node = DecompilerContext.GetClassProcessor().GetMapRootClasses
().GetOrNull(invexpr.GetClassname());
MethodWrapper methsource = null;
if (node != null && node.GetWrapper() != null)
{
methsource = node.GetWrapper().GetMethodWrapper(invexpr.GetName(), invexpr.GetStringDescriptor
());
}
if (methsource == null || !mapMethodType.ContainsKey(methsource))
{
return(null);
}
// if same method, return
if (node.classStruct.qualifiedName.Equals(caller.classStruct.qualifiedName) && methsource
.methodStruct.GetName().Equals(methdest.methodStruct.GetName()) && methsource.methodStruct
.GetDescriptor().Equals(methdest.methodStruct.GetDescriptor()))
{
// no recursive invocations permitted!
return(null);
}
NestedMemberAccess.MethodAccess type = mapMethodType.GetOrNull(methsource);
// // FIXME: impossible case. MethodAccess.NORMAL is not saved in the map
// if(type == MethodAccess.NORMAL) {
// return null;
// }
if (!SameTree(caller, node))
{
return(null);
}
DirectGraph graph = methsource.GetOrBuildGraph();
Exprent source = graph.first.exprents[0];
Exprent retexprent = null;
switch (type.ordinal())
{
case 1:
{
ExitExprent exsource = (ExitExprent)source;
if (exsource.GetValue().type == Exprent.Exprent_Var)
{
// qualified this
VarExprent var = (VarExprent)exsource.GetValue();
string varname = methsource.varproc.GetVarName(new VarVersionPair(var));
if (!methdest.setOuterVarNames.Contains(varname))
{
VarNamesCollector vnc = new VarNamesCollector();
vnc.AddName(varname);
methdest.varproc.RefreshVarNames(vnc);
methdest.setOuterVarNames.Add(varname);
}
int index = methdest.counter.GetCounterAndIncrement(CounterContainer.Var_Counter);
VarExprent ret = new VarExprent(index, var.GetVarType(), methdest.varproc);
methdest.varproc.SetVarName(new VarVersionPair(index, 0), varname);
retexprent = ret;
}
else
{
// field
FieldExprent ret = (FieldExprent)exsource.GetValue().Copy();
if (!ret.IsStatic())
{
ret.ReplaceExprent(ret.GetInstance(), invexpr.GetLstParameters()[0]);
}
retexprent = ret;
}
break;
}
case 2:
{
AssignmentExprent ret_1;
if (source.type == Exprent.Exprent_Exit)
{
ExitExprent extex = (ExitExprent)source;
ret_1 = (AssignmentExprent)extex.GetValue().Copy();
}
else
{
ret_1 = (AssignmentExprent)source.Copy();
}
FieldExprent fexpr = (FieldExprent)ret_1.GetLeft();
if (fexpr.IsStatic())
{
ret_1.ReplaceExprent(ret_1.GetRight(), invexpr.GetLstParameters()[0]);
}
else
{
ret_1.ReplaceExprent(ret_1.GetRight(), invexpr.GetLstParameters()[1]);
fexpr.ReplaceExprent(fexpr.GetInstance(), invexpr.GetLstParameters()[0]);
}
// do not use copied bytecodes
ret_1.GetLeft().bytecode = null;
ret_1.GetRight().bytecode = null;
retexprent = ret_1;
break;
}
case 4:
{
retexprent = ReplaceFunction(invexpr, source);
break;
}
case 3:
{
if (source.type == Exprent.Exprent_Exit)
{
source = ((ExitExprent)source).GetValue();
}
InvocationExprent invret = (InvocationExprent)source.Copy();
int index_1 = 0;
if (!invret.IsStatic())
{
invret.ReplaceExprent(invret.GetInstance(), invexpr.GetLstParameters()[0]);
index_1 = 1;
}
for (int i = 0; i < invret.GetLstParameters().Count; i++)
{
invret.ReplaceExprent(invret.GetLstParameters()[i], invexpr.GetLstParameters()[i
+ index_1]);
}
retexprent = invret;
break;
}
}
if (retexprent != null)
{
// preserve original bytecodes
retexprent.bytecode = null;
retexprent.AddBytecodeOffsets(invexpr.bytecode);
// hide synthetic access method
bool hide = true;
if (node.type == ClassesProcessor.ClassNode.Class_Root || (node.access & ICodeConstants
.Acc_Static) != 0)
{
StructMethod mt = methsource.methodStruct;
if (!mt.IsSynthetic())
{
hide = false;
}
}
if (hide)
{
node.GetWrapper().GetHiddenMembers().Add(InterpreterUtil.MakeUniqueKey(invexpr.GetName
(), invexpr.GetStringDescriptor()));
}
}
return(retexprent);
}
public virtual void SetVarDefinitions()
{
VarNamesCollector vc = varproc.GetVarNamesCollector();
foreach (KeyValuePair <int, Statement> en in mapVarDefStatements)
{
Statement stat = en.Value;
int index = en.Key;
if (implDefVars.Contains(index))
{
// already implicitly defined
continue;
}
varproc.SetVarName(new VarVersionPair(index, 0), vc.GetFreeName(index));
// special case for
if (stat.type == Statement.Type_Do)
{
DoStatement dstat = (DoStatement)stat;
if (dstat.GetLooptype() == DoStatement.Loop_For)
{
if (dstat.GetInitExprent() != null && SetDefinition(dstat.GetInitExprent(), index
))
{
continue;
}
else
{
List <Exprent> lstSpecial = Sharpen.Arrays.AsList(dstat.GetConditionExprent(), dstat
.GetIncExprent());
foreach (VarExprent var in GetAllVars(lstSpecial))
{
if (var.GetIndex() == index)
{
stat = stat.GetParent();
break;
}
}
}
}
}
Statement first = FindFirstBlock(stat, index);
List <Exprent> lst;
if (first == null)
{
lst = stat.GetVarDefinitions();
}
else if (first.GetExprents() == null)
{
lst = first.GetVarDefinitions();
}
else
{
lst = first.GetExprents();
}
bool defset = false;
// search for the first assignment to var [index]
int addindex = 0;
foreach (Exprent expr in lst)
{
if (SetDefinition(expr, index))
{
defset = true;
break;
}
else
{
bool foundvar = false;
foreach (Exprent exp in expr.GetAllExprents(true))
{
if (exp.type == Exprent.Exprent_Var && ((VarExprent)exp).GetIndex() == index)
{
foundvar = true;
break;
}
}
if (foundvar)
{
break;
}
}
addindex++;
}
if (!defset)
{
VarExprent var = new VarExprent(index, varproc.GetVarType(new VarVersionPair(index
, 0)), varproc);
var.SetDefinition(true);
lst.Add(addindex, var);
}
}
}
