internal InstructionParser(SourceMethodBody sourceMethodBody) {
Contract.Requires(sourceMethodBody != null);
this.sourceMethodBody = sourceMethodBody;
this.host = sourceMethodBody.host; Contract.Assume(this.host != null);
this.ilMethodBody = sourceMethodBody.ilMethodBody; Contract.Assume(this.ilMethodBody != null);
this.MethodDefinition = sourceMethodBody.MethodDefinition;
this.nameTable = sourceMethodBody.nameTable; Contract.Assume(this.nameTable != null);
this.sourceLocationProvider = sourceMethodBody.sourceLocationProvider;
this.localScopeProvider = sourceMethodBody.localScopeProvider;
this.options = sourceMethodBody.options;
this.platformType = sourceMethodBody.platformType; Contract.Assume(this.platformType != null);
this.numberOfAssignmentsToLocal = sourceMethodBody.numberOfAssignmentsToLocal; Contract.Assume(this.numberOfAssignmentsToLocal != null);
this.numberOfReferencesToLocal = sourceMethodBody.numberOfReferencesToLocal; Contract.Assume(this.numberOfReferencesToLocal != null);
this.gotosThatTarget = sourceMethodBody.gotosThatTarget; Contract.Assume(this.gotosThatTarget != null);
this.cdfg = sourceMethodBody.cdfg; Contract.Assume(this.cdfg != null);
this.bindingsThatMakeALastUseOfALocalVersion = sourceMethodBody.bindingsThatMakeALastUseOfALocalVersion; Contract.Assume(this.bindingsThatMakeALastUseOfALocalVersion != null);
if (this.localScopeProvider != null) {
var syncInfo = this.localScopeProvider.GetSynchronizationInformation(sourceMethodBody);
if (syncInfo != null) {
var syncPointFor = this.synchronizatonPointLocationFor = new Hashtable<SynchronizationPointLocation>();
IDocument doc = Dummy.Document;
foreach (var loc in this.MethodDefinition.Locations) { doc = loc.Document; break; }
foreach (var syncPoint in syncInfo.SynchronizationPoints) {
Contract.Assume(syncPoint != null);
var syncLoc = new SynchronizationPointLocation(doc, syncPoint);
syncPointFor[syncPoint.SynchronizeOffset] = syncLoc;
if (syncPoint.ContinuationMethod == null)
syncPointFor[syncPoint.ContinuationOffset] = syncLoc;
}
}
}
}
private void ParseInstruction(Instruction instruction, List<IStatement> statements) {
Contract.Requires(instruction != null);
Contract.Requires(statements != null);
Statement/*?*/ statement = null;
Expression/*?*/ expression = null;
ITypeReference/*?*/ elementType = null;
IOperation currentOperation = instruction.Operation;
OperationCode currentOpcode = currentOperation.OperationCode;
if (this.host.PreserveILLocations) {
if (this.lastLocation == null)
this.lastLocation = currentOperation.Location;
} else if (this.sourceLocationProvider != null) {
if (this.lastSourceLocation == null) {
foreach (var sourceLocation in this.sourceLocationProvider.GetPrimarySourceLocationsFor(currentOperation.Location)) {
Contract.Assume(sourceLocation != null);
if (sourceLocation.StartLine != 0x00feefee) {
this.lastSourceLocation = sourceLocation;
break;
}
}
}
}
if (this.synchronizatonPointLocationFor != null) {
uint currentOffset = currentOperation.Offset;
var syncPointLocation = this.synchronizatonPointLocationFor[currentOffset];
if (syncPointLocation != null) {
if (syncPointLocation.SynchronizationPoint.ContinuationOffset == currentOffset)
this.lastContinuationLocation = new ContinuationLocation(syncPointLocation);
else
this.lastSynchronizationLocation = syncPointLocation;
}
}
switch (currentOpcode) {
case OperationCode.Add:
case OperationCode.Add_Ovf:
case OperationCode.Add_Ovf_Un:
case OperationCode.And:
case OperationCode.Ceq:
case OperationCode.Cgt:
case OperationCode.Cgt_Un:
case OperationCode.Clt:
case OperationCode.Clt_Un:
case OperationCode.Div:
case OperationCode.Div_Un:
case OperationCode.Mul:
case OperationCode.Mul_Ovf:
case OperationCode.Mul_Ovf_Un:
case OperationCode.Or:
case OperationCode.Rem:
case OperationCode.Rem_Un:
case OperationCode.Shl:
case OperationCode.Shr:
case OperationCode.Shr_Un:
case OperationCode.Sub:
case OperationCode.Sub_Ovf:
case OperationCode.Sub_Ovf_Un:
case OperationCode.Xor:
expression = this.ParseBinaryOperation(currentOpcode);
break;
case OperationCode.Arglist:
expression = new RuntimeArgumentHandleExpression();
break;
case OperationCode.Array_Addr:
elementType = ((IArrayTypeReference)currentOperation.Value).ElementType;
expression = this.ParseArrayElementAddres(currentOperation, elementType);
break;
case OperationCode.Ldelema:
elementType = (ITypeReference)currentOperation.Value;
expression = this.ParseArrayElementAddres(currentOperation, elementType, treatArrayAsSingleDimensioned: true);
break;
case OperationCode.Array_Create:
case OperationCode.Array_Create_WithLowerBound:
case OperationCode.Newarr:
expression = this.ParseArrayCreate(currentOperation);
break;
case OperationCode.Array_Get:
elementType = ((IArrayTypeReference)currentOperation.Value).ElementType;
expression = this.ParseArrayIndexer(currentOperation, elementType??this.platformType.SystemObject, treatArrayAsSingleDimensioned: false);
break;
case OperationCode.Ldelem:
elementType = (ITypeReference)currentOperation.Value;
goto case OperationCode.Ldelem_Ref;
case OperationCode.Ldelem_I:
elementType = this.platformType.SystemIntPtr;
goto case OperationCode.Ldelem_Ref;
case OperationCode.Ldelem_I1:
elementType = this.platformType.SystemInt8;
goto case OperationCode.Ldelem_Ref;
case OperationCode.Ldelem_I2:
elementType = this.platformType.SystemInt16;
goto case OperationCode.Ldelem_Ref;
case OperationCode.Ldelem_I4:
elementType = this.platformType.SystemInt32;
goto case OperationCode.Ldelem_Ref;
case OperationCode.Ldelem_I8:
elementType = this.platformType.SystemInt64;
goto case OperationCode.Ldelem_Ref;
case OperationCode.Ldelem_R4:
elementType = this.platformType.SystemFloat32;
goto case OperationCode.Ldelem_Ref;
case OperationCode.Ldelem_R8:
elementType = this.platformType.SystemFloat64;
goto case OperationCode.Ldelem_Ref;
case OperationCode.Ldelem_U1:
elementType = this.platformType.SystemUInt8;
goto case OperationCode.Ldelem_Ref;
case OperationCode.Ldelem_U2:
elementType = this.platformType.SystemUInt16;
goto case OperationCode.Ldelem_Ref;
case OperationCode.Ldelem_U4:
elementType = this.platformType.SystemUInt32;
goto case OperationCode.Ldelem_Ref;
case OperationCode.Ldelem_Ref:
expression = this.ParseArrayIndexer(currentOperation, elementType??this.platformType.SystemObject, treatArrayAsSingleDimensioned: true);
break;
case OperationCode.Array_Set:
statement = this.ParseArraySet(currentOperation);
break;
case OperationCode.Beq:
case OperationCode.Beq_S:
case OperationCode.Bge:
case OperationCode.Bge_S:
case OperationCode.Bge_Un:
case OperationCode.Bge_Un_S:
case OperationCode.Bgt:
case OperationCode.Bgt_S:
case OperationCode.Bgt_Un:
case OperationCode.Bgt_Un_S:
case OperationCode.Ble:
case OperationCode.Ble_S:
case OperationCode.Ble_Un:
case OperationCode.Ble_Un_S:
case OperationCode.Blt:
case OperationCode.Blt_S:
case OperationCode.Blt_Un:
case OperationCode.Blt_Un_S:
case OperationCode.Bne_Un:
case OperationCode.Bne_Un_S:
statement = this.ParseBinaryConditionalBranch(currentOperation);
break;
case OperationCode.Box:
expression = this.ParseConversion(currentOperation);
break;
case OperationCode.Br:
case OperationCode.Br_S:
case OperationCode.Leave:
case OperationCode.Leave_S:
statement = this.ParseUnconditionalBranch(currentOperation);
break;
case OperationCode.Break:
statement = new DebuggerBreakStatement();
break;
case OperationCode.Brfalse:
case OperationCode.Brfalse_S:
case OperationCode.Brtrue:
case OperationCode.Brtrue_S:
statement = this.ParseUnaryConditionalBranch(currentOperation);
break;
case OperationCode.Call:
case OperationCode.Callvirt:
MethodCall call = this.ParseCall(currentOperation);
if (call.MethodToCall.Type.TypeCode == PrimitiveTypeCode.Void) {
call.Locations.Add(currentOperation.Location); // turning it into a statement prevents the location from being attached to the expresssion
ExpressionStatement es = new ExpressionStatement();
es.Expression = call;
statement = es;
} else
expression = call;
break;
case OperationCode.Calli:
expression = this.ParsePointerCall(currentOperation);
break;
case OperationCode.Castclass:
case OperationCode.Conv_I:
case OperationCode.Conv_I1:
case OperationCode.Conv_I2:
case OperationCode.Conv_I4:
case OperationCode.Conv_I8:
case OperationCode.Conv_Ovf_I:
case OperationCode.Conv_Ovf_I_Un:
case OperationCode.Conv_Ovf_I1:
case OperationCode.Conv_Ovf_I1_Un:
case OperationCode.Conv_Ovf_I2:
case OperationCode.Conv_Ovf_I2_Un:
case OperationCode.Conv_Ovf_I4:
case OperationCode.Conv_Ovf_I4_Un:
case OperationCode.Conv_Ovf_I8:
case OperationCode.Conv_Ovf_I8_Un:
case OperationCode.Conv_Ovf_U:
case OperationCode.Conv_Ovf_U_Un:
case OperationCode.Conv_Ovf_U1:
case OperationCode.Conv_Ovf_U1_Un:
case OperationCode.Conv_Ovf_U2:
case OperationCode.Conv_Ovf_U2_Un:
case OperationCode.Conv_Ovf_U4:
case OperationCode.Conv_Ovf_U4_Un:
case OperationCode.Conv_Ovf_U8:
case OperationCode.Conv_Ovf_U8_Un:
case OperationCode.Conv_R_Un:
case OperationCode.Conv_R4:
case OperationCode.Conv_R8:
case OperationCode.Conv_U:
case OperationCode.Conv_U1:
case OperationCode.Conv_U2:
case OperationCode.Conv_U4:
case OperationCode.Conv_U8:
case OperationCode.Unbox:
case OperationCode.Unbox_Any:
expression = this.ParseConversion(currentOperation);
break;
case OperationCode.Ckfinite:
var operand = this.PopOperandStack();
var chkfinite = new MutableCodeModel.MethodReference() {
CallingConvention = Cci.CallingConvention.FastCall,
ContainingType = host.PlatformType.SystemFloat64,
Name = this.host.NameTable.GetNameFor("__ckfinite__"),
Type = host.PlatformType.SystemFloat64,
InternFactory = host.InternFactory,
};
expression = new MethodCall() { Arguments = new List<IExpression>(1) { operand }, IsStaticCall = true, Type = operand.Type, MethodToCall = chkfinite };
break;
case OperationCode.Constrained_:
//This prefix is redundant and is not represented in the code model.
break;
case OperationCode.Cpblk:
var copyMemory = new CopyMemoryStatement();
copyMemory.NumberOfBytesToCopy = this.PopOperandStack();
copyMemory.SourceAddress = this.PopOperandStack();
copyMemory.TargetAddress = this.PopOperandStack();
statement = copyMemory;
break;
case OperationCode.Cpobj:
expression = this.ParseCopyObject();
break;
case OperationCode.Dup:
expression = this.ParseDup(instruction.Type);
break;
case OperationCode.Endfilter:
statement = this.ParseEndfilter();
break;
case OperationCode.Endfinally:
statement = new EndFinally();
break;
case OperationCode.Initblk:
var fillMemory = new FillMemoryStatement();
fillMemory.NumberOfBytesToFill = this.PopOperandStack();
fillMemory.FillValue = this.PopOperandStack();
fillMemory.TargetAddress = this.PopOperandStack();
statement = fillMemory;
break;
case OperationCode.Initobj:
statement = this.ParseInitObject(currentOperation);
break;
case OperationCode.Isinst:
expression = this.ParseCastIfPossible(currentOperation);
break;
case OperationCode.Jmp:
var methodToCall = (IMethodReference)currentOperation.Value;
expression = new MethodCall() { IsJumpCall = true, MethodToCall = methodToCall, Type = methodToCall.Type };
break;
case OperationCode.Ldarg:
case OperationCode.Ldarg_0:
case OperationCode.Ldarg_1:
case OperationCode.Ldarg_2:
case OperationCode.Ldarg_3:
case OperationCode.Ldarg_S:
case OperationCode.Ldloc:
case OperationCode.Ldloc_0:
case OperationCode.Ldloc_1:
case OperationCode.Ldloc_2:
case OperationCode.Ldloc_3:
case OperationCode.Ldloc_S:
case OperationCode.Ldfld:
case OperationCode.Ldsfld:
expression = this.ParseBoundExpression(instruction);
break;
case OperationCode.Ldarga:
case OperationCode.Ldarga_S:
case OperationCode.Ldflda:
case OperationCode.Ldsflda:
case OperationCode.Ldloca:
case OperationCode.Ldloca_S:
case OperationCode.Ldftn:
case OperationCode.Ldvirtftn:
expression = this.ParseAddressOf(instruction);
break;
case OperationCode.Ldc_I4:
case OperationCode.Ldc_I4_0:
case OperationCode.Ldc_I4_1:
case OperationCode.Ldc_I4_2:
case OperationCode.Ldc_I4_3:
case OperationCode.Ldc_I4_4:
case OperationCode.Ldc_I4_5:
case OperationCode.Ldc_I4_6:
case OperationCode.Ldc_I4_7:
case OperationCode.Ldc_I4_8:
case OperationCode.Ldc_I4_M1:
case OperationCode.Ldc_I4_S:
case OperationCode.Ldc_I8:
case OperationCode.Ldc_R4:
case OperationCode.Ldc_R8:
case OperationCode.Ldnull:
case OperationCode.Ldstr:
expression = this.ParseCompileTimeConstant(currentOperation);
break;
case OperationCode.Ldind_I:
case OperationCode.Ldind_I1:
case OperationCode.Ldind_I2:
case OperationCode.Ldind_I4:
case OperationCode.Ldind_I8:
case OperationCode.Ldind_R4:
case OperationCode.Ldind_R8:
case OperationCode.Ldind_Ref:
case OperationCode.Ldind_U1:
case OperationCode.Ldind_U2:
case OperationCode.Ldind_U4:
case OperationCode.Ldobj:
expression = this.ParseAddressDereference(currentOperation);
break;
case OperationCode.Ldlen:
expression = this.ParseVectorLength();
break;
case OperationCode.Ldtoken:
expression = ParseToken(currentOperation);
break;
case OperationCode.Localloc:
expression = this.ParseStackArrayCreate();
break;
case OperationCode.Mkrefany:
expression = this.ParseMakeTypedReference(currentOperation);
break;
case OperationCode.Neg:
expression = this.ParseUnaryOperation(new UnaryNegation());
break;
case OperationCode.Not:
expression = this.ParseUnaryOperation(new OnesComplement());
break;
case OperationCode.Newobj:
expression = this.ParseCreateObjectInstance(currentOperation);
break;
case OperationCode.No_:
Contract.Assume(false); //if code out there actually uses this, I need to know sooner rather than later.
//TODO: need object model support
break;
case OperationCode.Nop:
statement = new EmptyStatement();
break;
case OperationCode.Pop:
statement = this.ParsePop();
break;
case OperationCode.Readonly_:
this.sawReadonly = true;
break;
case OperationCode.Refanytype:
expression = this.ParseGetTypeOfTypedReference();
break;
case OperationCode.Refanyval:
expression = this.ParseGetValueOfTypedReference(currentOperation);
break;
case OperationCode.Ret:
statement = this.ParseReturn();
break;
case OperationCode.Rethrow:
statement = new RethrowStatement();
break;
case OperationCode.Sizeof:
expression = ParseSizeOf(currentOperation);
break;
case OperationCode.Starg:
case OperationCode.Starg_S:
case OperationCode.Stelem:
case OperationCode.Stelem_I:
case OperationCode.Stelem_I1:
case OperationCode.Stelem_I2:
case OperationCode.Stelem_I4:
case OperationCode.Stelem_I8:
case OperationCode.Stelem_R4:
case OperationCode.Stelem_R8:
case OperationCode.Stelem_Ref:
case OperationCode.Stfld:
case OperationCode.Stind_I:
case OperationCode.Stind_I1:
case OperationCode.Stind_I2:
case OperationCode.Stind_I4:
case OperationCode.Stind_I8:
case OperationCode.Stind_R4:
case OperationCode.Stind_R8:
case OperationCode.Stind_Ref:
case OperationCode.Stloc:
case OperationCode.Stloc_0:
case OperationCode.Stloc_1:
case OperationCode.Stloc_2:
case OperationCode.Stloc_3:
case OperationCode.Stloc_S:
case OperationCode.Stobj:
case OperationCode.Stsfld:
statement = this.ParseAssignment(currentOperation);
break;
case OperationCode.Switch:
statement = this.ParseSwitchInstruction(currentOperation);
break;
case OperationCode.Tail_:
this.sawTailCall = true;
break;
case OperationCode.Throw:
statement = this.ParseThrow();
break;
case OperationCode.Unaligned_:
Contract.Assume(currentOperation.Value is byte);
var alignment = (byte)currentOperation.Value;
Contract.Assume(alignment == 1 || alignment == 2 || alignment == 4);
this.alignment = alignment;
break;
case OperationCode.Volatile_:
this.sawVolatile = true;
break;
}
if (expression != null) {
if (expression.Type is Dummy)
expression.Type = instruction.Type;
Contract.Assume(!(expression.Type is Dummy));
if (expression.Type.TypeCode != PrimitiveTypeCode.Void) {
if (this.host.PreserveILLocations) {
expression.Locations.Add(currentOperation.Location);
}
this.operandStack.Push(expression);
}
} else if (statement != null) {
this.TurnOperandStackIntoPushStatements(statements);
statements.Add(statement);
if (this.host.PreserveILLocations) {
if (this.lastLocation != null) {
statement.Locations.Add(this.lastLocation);
this.lastLocation = null;
}
} else if (this.lastSourceLocation != null) {
statement.Locations.Add(this.lastSourceLocation);
this.lastSourceLocation = null;
}
if (this.lastSynchronizationLocation != null) {
statement.Locations.Add(this.lastSynchronizationLocation);
this.lastSynchronizationLocation = null;
} else if (this.lastContinuationLocation != null) {
statement.Locations.Add(this.lastContinuationLocation);
this.lastContinuationLocation = null;
}
}
}