/// <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;
}
}
}
}
/// <exception cref="System.IO.IOException"/>
public static RootStatement CodeToJava(StructMethod mt, MethodDescriptor md, VarProcessor
varProc)
{
StructClass cl = mt.GetClassStruct();
bool isInitializer = ICodeConstants.Clinit_Name.Equals(mt.GetName());
// for now static initializer only
mt.ExpandData();
InstructionSequence seq = mt.GetInstructionSequence();
ControlFlowGraph graph = new ControlFlowGraph(seq);
DeadCodeHelper.RemoveDeadBlocks(graph);
graph.InlineJsr(mt);
// TODO: move to the start, before jsr inlining
DeadCodeHelper.ConnectDummyExitBlock(graph);
DeadCodeHelper.RemoveGotos(graph);
ExceptionDeobfuscator.RemoveCircularRanges(graph);
ExceptionDeobfuscator.RestorePopRanges(graph);
if (DecompilerContext.GetOption(IFernflowerPreferences.Remove_Empty_Ranges))
{
ExceptionDeobfuscator.RemoveEmptyRanges(graph);
}
if (DecompilerContext.GetOption(IFernflowerPreferences.Ensure_Synchronized_Monitor
))
{
// special case: search for 'synchronized' ranges w/o monitorexit instruction (as generated by Kotlin and Scala)
DeadCodeHelper.ExtendSynchronizedRangeToMonitorexit(graph);
}
if (DecompilerContext.GetOption(IFernflowerPreferences.No_Exceptions_Return))
{
// special case: single return instruction outside of a protected range
DeadCodeHelper.IncorporateValueReturns(graph);
}
// ExceptionDeobfuscator.restorePopRanges(graph);
ExceptionDeobfuscator.InsertEmptyExceptionHandlerBlocks(graph);
DeadCodeHelper.MergeBasicBlocks(graph);
DecompilerContext.GetCounterContainer().SetCounter(CounterContainer.Var_Counter,
mt.GetLocalVariables());
if (ExceptionDeobfuscator.HasObfuscatedExceptions(graph))
{
DecompilerContext.GetLogger().WriteMessage("Heavily obfuscated exception ranges found!"
, IFernflowerLogger.Severity.Warn);
if (!ExceptionDeobfuscator.HandleMultipleEntryExceptionRanges(graph))
{
DecompilerContext.GetLogger().WriteMessage("Found multiple entry exception ranges which could not be splitted"
, IFernflowerLogger.Severity.Warn);
}
ExceptionDeobfuscator.InsertDummyExceptionHandlerBlocks(graph, cl.GetBytecodeVersion
());
}
RootStatement root = DomHelper.ParseGraph(graph);
FinallyProcessor fProc = new FinallyProcessor(md, varProc);
while (fProc.IterateGraph(mt, root, graph))
{
root = DomHelper.ParseGraph(graph);
}
// remove synchronized exception handler
// not until now because of comparison between synchronized statements in the finally cycle
DomHelper.RemoveSynchronizedHandler(root);
// LabelHelper.lowContinueLabels(root, new HashSet<StatEdge>());
SequenceHelper.CondenseSequences(root);
ClearStructHelper.ClearStatements(root);
ExprProcessor proc = new ExprProcessor(md, varProc);
proc.ProcessStatement(root, cl);
SequenceHelper.CondenseSequences(root);
StackVarsProcessor stackProc = new StackVarsProcessor();
do
{
stackProc.SimplifyStackVars(root, mt, cl);
varProc.SetVarVersions(root);
}while (new PPandMMHelper().FindPPandMM(root));
while (true)
{
LabelHelper.CleanUpEdges(root);
do
{
MergeHelper.EnhanceLoops(root);
}while (LoopExtractHelper.ExtractLoops(root) || IfHelper.MergeAllIfs(root));
if (DecompilerContext.GetOption(IFernflowerPreferences.Idea_Not_Null_Annotation))
{
if (IdeaNotNullHelper.RemoveHardcodedChecks(root, mt))
{
SequenceHelper.CondenseSequences(root);
stackProc.SimplifyStackVars(root, mt, cl);
varProc.SetVarVersions(root);
}
}
LabelHelper.IdentifyLabels(root);
if (InlineSingleBlockHelper.InlineSingleBlocks(root))
{
continue;
}
// initializer may have at most one return point, so no transformation of method exits permitted
if (isInitializer || !ExitHelper.CondenseExits(root))
{
break;
}
}
// FIXME: !!
//if(!EliminateLoopsHelper.eliminateLoops(root)) {
// break;
//}
ExitHelper.RemoveRedundantReturns(root);
SecondaryFunctionsHelper.IdentifySecondaryFunctions(root, varProc);
varProc.SetVarDefinitions(root);
// must be the last invocation, because it makes the statement structure inconsistent
// FIXME: new edge type needed
LabelHelper.ReplaceContinueWithBreak(root);
mt.ReleaseResources();
return(root);
}
