/// <summary>
/// Performs type analysis and rewrites program based on the inferred
/// information.
/// </summary>
/// <remarks>
/// For instance, all MemoryAccesses will be converted to structure
/// field accesses or array accesses as appropriate.
/// </remarks>
/// <param name="program"></param>
public void RewriteProgram(Program program)
{
factory = program.TypeFactory;
store = program.TypeStore;
aen = new ExpressionNormalizer(program.Platform.PointerType);
eqb = new EquivalenceClassBuilder(factory, store, eventListener);
tyco = new TypeCollector(
program.TypeFactory, program.TypeStore, program,
eventListener);
//dpa = new DerivedPointerAnalysis(factory, store, program.Architecture);
tvr = new TypeVariableReplacer(store);
trans = new TypeTransformer(factory, store,program, eventListener);
ctn = new ComplexTypeNamer();
ter = new TypedExpressionRewriter(program, eventListener);
// RestrictProcedures(program, 0, 60, true); // Re-enable this for debugging
aen.Transform(program);
eqb.Build(program);
tyco.CollectTypes();
store.BuildEquivalenceClassDataTypes(factory);
//dpa.FollowConstantPointers(prog);
tvr.ReplaceTypeVariables();
eventListener.ShowStatus("Transforming datatypes.");
var ppr = new PtrPrimitiveReplacer(factory, store, program);
ppr.ReplaceAll(eventListener);
trans.Transform();
ctn.RenameAllTypes(store);
ter.RewriteProgram(program);
}
/// <summary>
/// Main entry point of the decompiler. Decompiles, and outputs the results.
/// </summary>
public void Decompile()
{
try
{
ExtractResources();
ScanPrograms();
AnalyzeDataFlow();
ReconstructTypes();
StructureProgram();
WriteDecompilerProducts();
}
catch (Exception ex)
{
eventListener.Error(
new NullCodeLocation(""),
ex,
"An internal error occurred while decompiling.");
}
finally
{
eventListener.ShowStatus("Decompilation finished.");
}
}
/// <summary>
/// Performs type analysis and rewrites program based on the inferred information.
/// </summary>
/// <remarks>
/// For instance, all MemoryAccesses will be converted to structure field
/// accesses or array accesses as appropriate.
/// </remarks>
/// <param name="prog"></param>
public void RewriteProgram(Program prog)
{
factory = prog.TypeFactory;
store = prog.TypeStore;
aen = new ExpressionNormalizer(prog.Platform.PointerType);
eqb = new EquivalenceClassBuilder(factory, store);
dtb = new DataTypeBuilder(factory, store, prog.Platform);
trco = new TraitCollector(factory, store, dtb, prog);
//dpa = new DerivedPointerAnalysis(factory, store, prog.Architecture);
tvr = new TypeVariableReplacer(store);
trans = new TypeTransformer(factory, store, prog, eventListener);
ctn = new ComplexTypeNamer();
ter = new TypedExpressionRewriter(prog);
// RestrictProcedures(prog, 0, 1, true); // Re-enable this for debugging
eventListener.ShowStatus("Gathering primitive datatypes from instructions.");
aen.Transform(prog);
eqb.Build(prog);
eventListener.ShowStatus("Collecting datatype usage traits.");
trco.CollectProgramTraits(prog);
eventListener.ShowStatus("Building equivalence classes.");
dtb.BuildEquivalenceClassDataTypes();
//dpa.FollowConstantPointers(prog);
tvr.ReplaceTypeVariables();
eventListener.ShowStatus("Transforming datatypes.");
var ppr = new PtrPrimitiveReplacer(factory, store, prog);
ppr.ReplaceAll();
trans.Transform();
ctn.RenameAllTypes(store);
store.Dump();
eventListener.ShowStatus("Rewriting expressions.");
ter.RewriteProgram(prog);
}
/// <summary>
/// Finds all interprocedural register dependencies (in- and out-parameters) and
/// abstracts them away by rewriting as calls.
/// </summary>
/// <returns>A RegisterLiveness object that summarizes the interprocedural register
/// liveness analysis. This information can be used to generate SSA form.
/// </returns>
public void UntangleProcedures()
{
eventListener.ShowStatus("Eliminating intra-block dead registers.");
IntraBlockDeadRegisters.Apply(program);
eventListener.ShowStatus("Finding terminating procedures.");
var term = new TerminationAnalysis(flow);
term.Analyze(program);
eventListener.ShowStatus("Finding trashed registers.");
var trf = new TrashedRegisterFinder(program, program.Procedures.Values, flow, eventListener);
trf.Compute();
eventListener.ShowStatus("Rewriting affine expressions.");
trf.RewriteBasicBlocks();
eventListener.ShowStatus("Computing register liveness.");
var rl = RegisterLiveness.Compute(program, flow, eventListener);
eventListener.ShowStatus("Rewriting calls.");
GlobalCallRewriter.Rewrite(program, flow);
}
/// <summary>
/// Performs type analysis and rewrites program based on the inferred
/// information.
/// </summary>
/// <remarks>
/// For instance, all MemoryAccesses will be converted to structure
/// field accesses or array accesses as appropriate.
/// </remarks>
/// <param name="program"></param>
public void RewriteProgram(Program program)
{
factory = program.TypeFactory;
store = program.TypeStore;
var timer = new Stopwatch();
aen = new ExpressionNormalizer(program.Platform.PointerType);
eqb = new EquivalenceClassBuilder(factory, store, eventListener);
tyco = new TypeCollector(
program.TypeFactory, program.TypeStore, program,
eventListener);
//dpa = new DerivedPointerAnalysis(factory, store, program.Architecture);
tvr = new TypeVariableReplacer(store);
trans = new TypeTransformer(factory, store, program, eventListener);
ctn = new ComplexTypeNamer();
ter = new TypedExpressionRewriter(program, eventListener);
RestrictProcedures(program, 0, 0, false);
Time("Normalizing expressions", () => aen.Transform(program));
Time("Building equivalence classes", () => eqb.Build(program));
Time("Collecting data types", tyco.CollectTypes);
Time("Build eq. class data types", () => store.BuildEquivalenceClassDataTypes(factory));
//dpa.FollowConstantPointers(program);
Time("Replacing type variables", tvr.ReplaceTypeVariables);
eventListener.ShowStatus("Transforming datatypes.");
Time("Replace primitive types", () =>
{
var ppr = new PtrPrimitiveReplacer(factory, store, program, eventListener);
ppr.ReplaceAll();
});
Time("Transforming data types", trans.Transform);
Time("Renaming data types", () => ctn.RenameAllTypes(store));
Time("Rewriting program with type information", () => ter.RewriteProgram(program));
}
/// <summary>
/// Finds all interprocedural register dependencies (in- and out-parameters) and
/// abstracts them away by rewriting as calls.
/// </summary>
/// <returns>A RegisterLiveness object that summarizes the interprocedural register
/// liveness analysis. This information can be used to generate SSA form.
/// </returns>
public void UntangleProcedures()
{
eventListener.ShowStatus("Eliminating intra-block dead registers.");
var usb = new UserSignatureBuilder(program);
usb.BuildSignatures(eventListener);
CallRewriter.Rewrite(program, eventListener);
IntraBlockDeadRegisters.Apply(program, eventListener);
AdjacentBranchCollector.Transform(program, eventListener);
eventListener.ShowStatus("Finding terminating procedures.");
var term = new TerminationAnalysis(flow, eventListener);
term.Analyze(program);
eventListener.ShowStatus("Finding trashed registers.");
var trf = new TrashedRegisterFinder(program, program.Procedures.Values, flow, eventListener);
trf.Compute();
eventListener.ShowStatus("Rewriting affine expressions.");
trf.RewriteBasicBlocks();
eventListener.ShowStatus("Computing register liveness.");
RegisterLiveness.Compute(program, flow, eventListener);
eventListener.ShowStatus("Rewriting calls.");
GlobalCallRewriter.Rewrite(program, flow, eventListener);
}
/// <summary>
/// Main entry point of the decompiler. Loads, decompiles, and outputs the results.
/// </summary>
public void Decompile(string filename, string loader = null)
{
try
{
Load(filename, loader);
ScanPrograms();
AnalyzeDataFlow();
ReconstructTypes();
StructureProgram();
WriteDecompilerProducts();
}
catch (Exception ex)
{
eventListener.Error(
new NullCodeLocation(filename),
ex,
"An internal error occurred while decompiling.");
}
finally
{
eventListener.ShowStatus("Decompilation finished.");
}
}
