internal DecompilationContext (MethodBody body, ControlFlowGraph cfg)
{
this.body = body;
this.method = body.Method;
this.variables = CloneCollection (body.Variables);
this.cfg = cfg;
}
public BlockStatement Process (DecompilationContext context, BlockStatement body)
{
this.cfg = context.ControlFlowGraph;
this.annotations = AnnotationStore.CreateStore (cfg, optimization);
this.body = context.Body;
this.variables = context.Variables;
this.expression_decompiler = new ExpressionDecompiler (context.Method, annotations);
this.statements = new List<Statement> [cfg.Blocks.Length];
this.processed = new HashSet<InstructionBlock> ();
this.assignments = new Dictionary<VariableReference, Expression> ();
Run ();
PopulateBodyBlock (body);
return body;
}
protected virtual void Visit(MethodDefinition method)
{
IEnumerable<Instruction> transformed = null;
this.cfg = ControlFlowGraph.Create (method);
foreach (var b in cfg.Blocks) {
block = b;
foreach (var instruction in block) {
switch (instruction.OpCode.Code) {
case Code.Nop:
transformed = this.OnNop (instruction);
break;
case Code.Break:
transformed = this.OnBreak (instruction);
break;
case Code.Ldarg_0:
transformed = this.OnLdarg_0 (instruction);
break;
case Code.Ldarg_1:
transformed = this.OnLdarg_1 (instruction);
break;
case Code.Ldarg_2:
transformed = this.OnLdarg_2 (instruction);
break;
case Code.Ldarg_3:
transformed = this.OnLdarg_3 (instruction);
break;
case Code.Ldloc_0:
transformed = this.OnLdloc_0 (instruction);
break;
case Code.Ldloc_1:
transformed = this.OnLdloc_1 (instruction);
break;
case Code.Ldloc_2:
transformed = this.OnLdloc_2 (instruction);
break;
case Code.Ldloc_3:
transformed = this.OnLdloc_3 (instruction);
break;
case Code.Stloc_0:
transformed = this.OnStloc_0 (instruction);
break;
case Code.Stloc_1:
transformed = this.OnStloc_1 (instruction);
break;
case Code.Stloc_2:
transformed = this.OnStloc_2 (instruction);
break;
case Code.Stloc_3:
transformed = this.OnStloc_3 (instruction);
break;
case Code.Ldarg:
case Code.Ldarg_S:
transformed = this.OnLdarg (instruction);
break;
case Code.Ldarga:
case Code.Ldarga_S:
transformed = this.OnLdarga (instruction);
break;
case Code.Starg:
case Code.Starg_S:
transformed = this.OnStarg (instruction);
break;
case Code.Ldloc:
case Code.Ldloc_S:
transformed = this.OnLdloc (instruction);
break;
case Code.Ldloca:
case Code.Ldloca_S:
transformed = this.OnLdloca (instruction);
break;
case Code.Stloc:
case Code.Stloc_S:
transformed = this.OnStloc (instruction);
break;
case Code.Ldnull:
transformed = this.OnLdnull (instruction);
break;
case Code.Ldc_I4_M1:
transformed = this.OnLdc_I4_M1 (instruction);
break;
case Code.Ldc_I4_0:
transformed = this.OnLdc_I4_0 (instruction);
break;
case Code.Ldc_I4_1:
transformed = this.OnLdc_I4_1 (instruction);
break;
case Code.Ldc_I4_2:
transformed = this.OnLdc_I4_2 (instruction);
break;
case Code.Ldc_I4_3:
transformed = this.OnLdc_I4_3 (instruction);
break;
case Code.Ldc_I4_4:
transformed = this.OnLdc_I4_4 (instruction);
break;
case Code.Ldc_I4_5:
transformed = this.OnLdc_I4_5 (instruction);
break;
case Code.Ldc_I4_6:
transformed = this.OnLdc_I4_6 (instruction);
break;
case Code.Ldc_I4_7:
transformed = this.OnLdc_I4_7 (instruction);
break;
case Code.Ldc_I4_8:
transformed = this.OnLdc_I4_8 (instruction);
break;
case Code.Ldc_I4:
case Code.Ldc_I4_S:
transformed = this.OnLdc_I4 (instruction);
break;
case Code.Ldc_I8:
transformed = this.OnLdc_I8 (instruction);
break;
case Code.Ldc_R4:
transformed = this.OnLdc_R4 (instruction);
break;
case Code.Ldc_R8:
transformed = this.OnLdc_R8 (instruction);
break;
case Code.Dup:
transformed = this.OnDup (instruction);
break;
case Code.Pop:
transformed = this.OnPop (instruction);
break;
case Code.Jmp:
transformed = this.OnJmp (instruction);
break;
case Code.Call:
transformed = this.OnCall (instruction);
break;
case Code.Calli:
transformed = this.OnCalli (instruction);
break;
case Code.Ret:
transformed = this.OnRet (instruction);
break;
case Code.Br:
case Code.Br_S:
transformed = this.OnBr (instruction);
break;
case Code.Brfalse:
case Code.Brfalse_S:
transformed = this.OnBrfalse (instruction);
break;
case Code.Brtrue:
case Code.Brtrue_S:
transformed = this.OnBrtrue (instruction);
break;
case Code.Beq:
case Code.Beq_S:
transformed = this.OnBeq (instruction);
break;
case Code.Bge:
case Code.Bge_S:
transformed = this.OnBge (instruction);
break;
case Code.Bgt:
case Code.Bgt_S:
transformed = this.OnBgt (instruction);
break;
case Code.Ble:
case Code.Ble_S:
transformed = this.OnBle (instruction);
break;
case Code.Blt:
case Code.Blt_S:
transformed = this.OnBlt (instruction);
break;
case Code.Bne_Un:
case Code.Bne_Un_S:
transformed = this.OnBne_Un (instruction);
break;
case Code.Bge_Un:
case Code.Bge_Un_S:
transformed = this.OnBge_Un (instruction);
break;
case Code.Bgt_Un:
case Code.Bgt_Un_S:
transformed = this.OnBgt_Un (instruction);
break;
case Code.Ble_Un:
case Code.Ble_Un_S:
transformed = this.OnBle_Un (instruction);
break;
case Code.Blt_Un:
case Code.Blt_Un_S:
transformed = this.OnBlt_Un (instruction);
break;
case Code.Switch:
transformed = this.OnSwitch (instruction);
break;
case Code.Ldind_I1:
transformed = this.OnLdind_I1 (instruction);
break;
case Code.Ldind_U1:
transformed = this.OnLdind_U1 (instruction);
break;
case Code.Ldind_I2:
transformed = this.OnLdind_I2 (instruction);
break;
case Code.Ldind_U2:
transformed = this.OnLdind_U2 (instruction);
break;
case Code.Ldind_I4:
transformed = this.OnLdind_I4 (instruction);
break;
case Code.Ldind_U4:
transformed = this.OnLdind_U4 (instruction);
break;
case Code.Ldind_I8:
transformed = this.OnLdind_I8 (instruction);
break;
case Code.Ldind_I:
transformed = this.OnLdind_I (instruction);
break;
case Code.Ldind_R4:
transformed = this.OnLdind_R4 (instruction);
break;
case Code.Ldind_R8:
transformed = this.OnLdind_R8 (instruction);
break;
case Code.Ldind_Ref:
transformed = this.OnLdind_Ref (instruction);
break;
case Code.Stind_Ref:
transformed = this.OnStind_Ref (instruction);
break;
case Code.Stind_I1:
transformed = this.OnStind_I1 (instruction);
break;
case Code.Stind_I2:
transformed = this.OnStind_I2 (instruction);
break;
case Code.Stind_I4:
transformed = this.OnStind_I4 (instruction);
break;
case Code.Stind_I8:
transformed = this.OnStind_I8 (instruction);
break;
case Code.Stind_R4:
transformed = this.OnStind_R4 (instruction);
break;
case Code.Stind_R8:
transformed = this.OnStind_R8 (instruction);
break;
case Code.Add:
transformed = this.OnAdd (instruction);
break;
case Code.Sub:
transformed = this.OnSub (instruction);
break;
case Code.Mul:
transformed = this.OnMul (instruction);
break;
case Code.Div:
transformed = this.OnDiv (instruction);
break;
case Code.Div_Un:
transformed = this.OnDiv_Un (instruction);
break;
case Code.Rem:
transformed = this.OnRem (instruction);
break;
case Code.Rem_Un:
transformed = this.OnRem_Un (instruction);
break;
case Code.And:
transformed = this.OnAnd (instruction);
break;
case Code.Or:
transformed = this.OnOr (instruction);
break;
case Code.Xor:
transformed = this.OnXor (instruction);
break;
case Code.Shl:
transformed = this.OnShl (instruction);
break;
case Code.Shr:
transformed = this.OnShr (instruction);
break;
case Code.Shr_Un:
transformed = this.OnShr_Un (instruction);
break;
case Code.Neg:
transformed = this.OnNeg (instruction);
break;
case Code.Not:
transformed = this.OnNot (instruction);
break;
case Code.Conv_I1:
transformed = this.OnConv_I1 (instruction);
break;
case Code.Conv_I2:
transformed = this.OnConv_I2 (instruction);
break;
case Code.Conv_I4:
transformed = this.OnConv_I4 (instruction);
break;
case Code.Conv_I8:
transformed = this.OnConv_I8 (instruction);
break;
case Code.Conv_R4:
transformed = this.OnConv_R4 (instruction);
break;
case Code.Conv_R8:
transformed = this.OnConv_R8 (instruction);
break;
case Code.Conv_U4:
transformed = this.OnConv_U4 (instruction);
break;
case Code.Conv_U8:
transformed = this.OnConv_U8 (instruction);
break;
case Code.Callvirt:
transformed = this.OnCallvirt (instruction);
break;
case Code.Cpobj:
transformed = this.OnCpobj (instruction);
break;
case Code.Ldobj:
transformed = this.OnLdobj (instruction);
break;
case Code.Ldstr:
transformed = this.OnLdstr (instruction);
break;
case Code.Newobj:
transformed = this.OnNewobj (instruction);
break;
case Code.Castclass:
transformed = this.OnCastclass (instruction);
break;
case Code.Isinst:
transformed = this.OnIsinst (instruction);
break;
case Code.Conv_R_Un:
transformed = this.OnConv_R_Un (instruction);
break;
case Code.Unbox:
transformed = this.OnUnbox (instruction);
break;
case Code.Throw:
transformed = this.OnThrow (instruction);
break;
case Code.Ldfld:
transformed = this.OnLdfld (instruction);
break;
case Code.Ldflda:
transformed = this.OnLdflda (instruction);
break;
case Code.Stfld:
transformed = this.OnStfld (instruction);
break;
case Code.Ldsfld:
transformed = this.OnLdsfld (instruction);
break;
case Code.Ldsflda:
transformed = this.OnLdsflda (instruction);
break;
case Code.Stsfld:
transformed = this.OnStsfld (instruction);
break;
case Code.Stobj:
transformed = this.OnStobj (instruction);
break;
case Code.Conv_Ovf_I1_Un:
transformed = this.OnConv_Ovf_I1_Un (instruction);
break;
case Code.Conv_Ovf_I2_Un:
transformed = this.OnConv_Ovf_I2_Un (instruction);
break;
case Code.Conv_Ovf_I4_Un:
transformed = this.OnConv_Ovf_I4_Un (instruction);
break;
case Code.Conv_Ovf_I8_Un:
transformed = this.OnConv_Ovf_I8_Un (instruction);
break;
case Code.Conv_Ovf_U1_Un:
transformed = this.OnConv_Ovf_U1_Un (instruction);
break;
case Code.Conv_Ovf_U2_Un:
transformed = this.OnConv_Ovf_U2_Un (instruction);
break;
case Code.Conv_Ovf_U4_Un:
transformed = this.OnConv_Ovf_U4_Un (instruction);
break;
case Code.Conv_Ovf_U8_Un:
transformed = this.OnConv_Ovf_U8_Un (instruction);
break;
case Code.Conv_Ovf_I_Un:
transformed = this.OnConv_Ovf_I_Un (instruction);
break;
case Code.Conv_Ovf_U_Un:
transformed = this.OnConv_Ovf_U_Un (instruction);
break;
case Code.Box:
transformed = this.OnBox (instruction);
break;
case Code.Newarr:
transformed = this.OnNewarr (instruction);
break;
case Code.Ldlen:
transformed = this.OnLdlen (instruction);
break;
case Code.Ldelema:
transformed = this.OnLdelema (instruction);
break;
case Code.Ldelem_I1:
transformed = this.OnLdelem_I1 (instruction);
break;
case Code.Ldelem_U1:
transformed = this.OnLdelem_U1 (instruction);
break;
case Code.Ldelem_I2:
transformed = this.OnLdelem_I2 (instruction);
break;
case Code.Ldelem_U2:
transformed = this.OnLdelem_U2 (instruction);
break;
case Code.Ldelem_I4:
transformed = this.OnLdelem_I4 (instruction);
break;
case Code.Ldelem_U4:
transformed = this.OnLdelem_U4 (instruction);
break;
case Code.Ldelem_I8:
transformed = this.OnLdelem_I8 (instruction);
break;
case Code.Ldelem_I:
transformed = this.OnLdelem_I (instruction);
break;
case Code.Ldelem_R4:
transformed = this.OnLdelem_R4 (instruction);
break;
case Code.Ldelem_R8:
transformed = this.OnLdelem_R8 (instruction);
break;
case Code.Ldelem_Ref:
transformed = this.OnLdelem_Ref (instruction);
break;
case Code.Stelem_I:
transformed = this.OnStelem_I (instruction);
break;
case Code.Stelem_I1:
transformed = this.OnStelem_I1 (instruction);
break;
case Code.Stelem_I2:
transformed = this.OnStelem_I2 (instruction);
break;
case Code.Stelem_I4:
transformed = this.OnStelem_I4 (instruction);
break;
case Code.Stelem_I8:
transformed = this.OnStelem_I8 (instruction);
break;
case Code.Stelem_R4:
transformed = this.OnStelem_R4 (instruction);
break;
case Code.Stelem_R8:
transformed = this.OnStelem_R8 (instruction);
break;
case Code.Stelem_Ref:
transformed = this.OnStelem_Ref (instruction);
break;
case Code.Ldelem_Any:
transformed = this.OnLdelem_Any (instruction);
break;
case Code.Stelem_Any:
transformed = this.OnStelem_Any (instruction);
break;
case Code.Unbox_Any:
transformed = this.OnUnbox_Any (instruction);
break;
case Code.Conv_Ovf_I1:
transformed = this.OnConv_Ovf_I1 (instruction);
break;
case Code.Conv_Ovf_U1:
transformed = this.OnConv_Ovf_U1 (instruction);
break;
case Code.Conv_Ovf_I2:
transformed = this.OnConv_Ovf_I2 (instruction);
break;
case Code.Conv_Ovf_U2:
transformed = this.OnConv_Ovf_U2 (instruction);
break;
case Code.Conv_Ovf_I4:
transformed = this.OnConv_Ovf_I4 (instruction);
break;
case Code.Conv_Ovf_U4:
transformed = this.OnConv_Ovf_U4 (instruction);
break;
case Code.Conv_Ovf_I8:
transformed = this.OnConv_Ovf_I8 (instruction);
break;
case Code.Conv_Ovf_U8:
transformed = this.OnConv_Ovf_U8 (instruction);
break;
case Code.Refanyval:
transformed = this.OnRefanyval (instruction);
break;
case Code.Ckfinite:
transformed = this.OnCkfinite (instruction);
break;
case Code.Mkrefany:
transformed = this.OnMkrefany (instruction);
break;
case Code.Ldtoken:
transformed = this.OnLdtoken (instruction);
break;
case Code.Conv_U2:
transformed = this.OnConv_U2 (instruction);
break;
case Code.Conv_U1:
transformed = this.OnConv_U1 (instruction);
break;
case Code.Conv_I:
transformed = this.OnConv_I (instruction);
break;
case Code.Conv_Ovf_I:
transformed = this.OnConv_Ovf_I (instruction);
break;
case Code.Conv_Ovf_U:
transformed = this.OnConv_Ovf_U (instruction);
break;
case Code.Add_Ovf:
transformed = this.OnAdd_Ovf (instruction);
break;
case Code.Add_Ovf_Un:
transformed = this.OnAdd_Ovf_Un (instruction);
break;
case Code.Mul_Ovf:
transformed = this.OnMul_Ovf (instruction);
break;
case Code.Mul_Ovf_Un:
transformed = this.OnMul_Ovf_Un (instruction);
break;
case Code.Sub_Ovf:
transformed = this.OnSub_Ovf (instruction);
break;
case Code.Sub_Ovf_Un:
transformed = this.OnSub_Ovf_Un (instruction);
break;
case Code.Endfinally:
transformed = this.OnEndfinally (instruction);
break;
case Code.Leave:
case Code.Leave_S:
transformed = this.OnLeave (instruction);
break;
case Code.Stind_I:
transformed = this.OnStind_I (instruction);
break;
case Code.Conv_U:
transformed = this.OnConv_U (instruction);
break;
case Code.Arglist:
transformed = this.OnArglist (instruction);
break;
case Code.Ceq:
transformed = this.OnCeq (instruction);
break;
case Code.Cgt:
transformed = this.OnCgt (instruction);
break;
case Code.Cgt_Un:
transformed = this.OnCgt_Un (instruction);
break;
case Code.Clt:
transformed = this.OnClt (instruction);
break;
case Code.Clt_Un:
transformed = this.OnClt_Un (instruction);
break;
case Code.Ldftn:
transformed = this.OnLdftn (instruction);
break;
case Code.Ldvirtftn:
transformed = this.OnLdvirtftn (instruction);
break;
case Code.Localloc:
transformed = this.OnLocalloc (instruction);
break;
case Code.Endfilter:
transformed = this.OnEndfilter (instruction);
break;
case Code.Unaligned:
transformed = this.OnUnaligned (instruction);
break;
case Code.Volatile:
transformed = this.OnVolatile (instruction);
break;
case Code.Tail:
transformed = this.OnTail (instruction);
break;
case Code.Initobj:
transformed = this.OnInitobj (instruction);
break;
case Code.Cpblk:
transformed = this.OnCpblk (instruction);
break;
case Code.Initblk:
transformed = this.OnInitblk (instruction);
break;
case Code.Rethrow:
transformed = this.OnRethrow (instruction);
break;
case Code.Sizeof:
transformed = this.OnSizeof (instruction);
break;
case Code.Refanytype:
transformed = this.OnRefanytype (instruction);
break;
case Code.Constrained:
transformed = this.OnConstrained (instruction);
break;
default:
throw new Exception ("Unknown instruction: " + instruction);
}
if (transformed == null) {
InstructionMap.Add (instruction, new Instruction [] { instruction });
} else {
var list = transformed.ToList ();
/*
if (list.Count != 0 && list [0] != null && (list [0] != instruction || list.Count > 1)) {
MapInstructions (method.Body, instruction, list [0], list [list.Count - 1]);
}
*/
InstructionMap.Add (instruction, list);
}
} // foreach instruction
} // foreach block
}
public static void FormatControlFlowGraph (TextWriter writer, ControlFlowGraph cfg)
{
foreach (InstructionBlock block in cfg.Blocks) {
writer.WriteLine ("block {0}:", block.Index);
writer.WriteLine ("\tbody:");
foreach (Instruction instruction in block) {
writer.Write ("\t\t");
var data = cfg.GetData (instruction);
writer.Write ("[{0}:{1}] ", data.StackBefore, data.StackAfter);
Formatter.WriteInstruction (writer, instruction);
writer.WriteLine ();
}
InstructionBlock [] successors = block.Successors;
if (successors.Length > 0) {
writer.WriteLine ("\tsuccessors:");
foreach (InstructionBlock successor in successors) {
writer.WriteLine ("\t\tblock {0}", successor.Index);
}
}
}
}
public static string ToString (ControlFlowGraph cfg)
{
StringWriter writer = new StringWriter ();
FormatControlFlowGraph (writer, cfg);
return writer.ToString ();
}