mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-19 12:30:32 +00:00
259 lines
13 KiB
C#
259 lines
13 KiB
C#
using System;
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using System.Linq;
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using Cosmos.Assembler;
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using CPUx86 = Cosmos.Assembler.x86;
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using Cosmos.IL2CPU.ILOpCodes;
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using Cosmos.IL2CPU.IL.CustomImplementations.System;
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using System.Reflection;
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using SysReflection = System.Reflection;
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namespace Cosmos.IL2CPU.X86.IL
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{
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[Cosmos.IL2CPU.OpCode(ILOpCode.Code.Newobj)]
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public class Newobj : ILOp
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{
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public Newobj(Cosmos.Assembler.Assembler aAsmblr)
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: base(aAsmblr)
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{
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}
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public override void Execute(MethodInfo aMethod, ILOpCode aOpCode)
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{
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OpMethod xMethod = (OpMethod)aOpCode;
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string xCurrentLabel = GetLabel(aMethod, aOpCode);
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var xType = xMethod.Value.DeclaringType;
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Assemble(Assembler, aMethod, xMethod, xCurrentLabel, xType, xMethod.Value);
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}
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public static void Assemble(Cosmos.Assembler.Assembler aAssembler, MethodInfo aMethod, OpMethod xMethod, string currentLabel, Type objectType, MethodBase constructor)
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{
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// call cctor:
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if (aMethod != null)
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{
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var xCctor = (objectType.GetConstructors(BindingFlags.Static | BindingFlags.NonPublic) ?? new ConstructorInfo[0]).SingleOrDefault();
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if (xCctor != null)
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{
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new CPUx86.Call { DestinationLabel = LabelName.Get(xCctor) };
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ILOp.EmitExceptionLogic(aAssembler, aMethod, xMethod, true, null, ".AfterCCTorExceptionCheck");
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new Label(".AfterCCTorExceptionCheck");
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}
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}
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if (objectType.IsValueType)
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{
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new Comment("ValueType");
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/*
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* Current sitation on stack:
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* $ESP Arg
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* $ESP+.. other items
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*
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* What should happen:
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* + The stack should be increased to allow space to contain:
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* + .ctor arguments
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* + struct _pointer_ (ref to start of emptied space)
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* + empty space for struct
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* + arguments should be copied to the new place
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* + old place where arguments were should be cleared
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* + pointer should be set
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* + call .ctor
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*/
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// Size of return value - we need to make room for this on the stack.
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uint xStorageSize = Align(SizeOfType(objectType), 4);
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new Comment("StorageSize: " + xStorageSize);
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if (xStorageSize == 0)
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{
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throw new Exception("ValueType storage size cannot be 0.");
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}
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//var xStorageSize = aCtorDeclTypeInfo.StorageSize;
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uint xArgSize = 0;
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var xParameterList = constructor.GetParameters();
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foreach (var xParam in xParameterList)
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{
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xArgSize = xArgSize + Align(SizeOfType(xParam.ParameterType), 4);
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}
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new Comment("ArgSize: " + xArgSize);
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// Set ESP so we can push the struct ptr
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int xShift = (int)(xArgSize - xStorageSize);
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new Comment("Shift: " + xShift);
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if (xShift < 0)
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{
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new CPUx86.Sub { DestinationReg = CPUx86.Registers.ESP, SourceValue = (uint)Math.Abs(xShift) };
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}
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else if (xShift > 0)
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{
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new CPUx86.Add { DestinationReg = CPUx86.Registers.ESP, SourceValue = (uint)xShift };
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}
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// push struct ptr
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new CPUx86.Push { DestinationReg = CPUx86.Registers.ESP };
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// Shift args
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foreach (var xParam in xParameterList)
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{
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uint xArgSizeForThis = Align(SizeOfType(xParam.ParameterType), 4);
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for (int i = 1; i <= xArgSizeForThis / 4; i++)
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{
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new CPUx86.Push { DestinationReg = CPUx86.Registers.ESP, DestinationIsIndirect = true, DestinationDisplacement = (int)xStorageSize };
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}
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}
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new Call(aAssembler).Execute(aMethod, xMethod);
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// Need to put these *after* the call because the Call pops the args from the stack
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// and we have mucked about on the stack, so this makes it right before the next
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// op.
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}
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else
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{
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// If not ValueType, then we need gc
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var xParams = constructor.GetParameters();
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// array length + 8
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bool xHasCalcSize = false;
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// try calculating size:
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if (constructor.DeclaringType == typeof(string))
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{
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if (xParams.Length == 1 && xParams[0].ParameterType == typeof(char[]))
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{
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xHasCalcSize = true;
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new CPUx86.Mov { DestinationReg = CPUx86.Registers.EAX, SourceReg = CPUx86.Registers.ESP, SourceIsIndirect = true };
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new CPUx86.Mov { DestinationReg = CPUx86.Registers.EAX, SourceReg = CPUx86.Registers.EAX, SourceIsIndirect = true, SourceDisplacement = 8 };
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new CPUx86.Mov { DestinationReg = CPUx86.Registers.EDX, SourceValue = 2 };
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new CPUx86.Multiply { DestinationReg = CPUx86.Registers.EDX };
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new CPUx86.Push { DestinationReg = CPUx86.Registers.EAX };
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}
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else if (xParams.Length == 3 && xParams[0].ParameterType == typeof(char[]) && xParams[1].ParameterType == typeof(int) && xParams[2].ParameterType == typeof(int))
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{
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xHasCalcSize = true;
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new CPUx86.Mov { DestinationReg = CPUx86.Registers.EAX, SourceReg = CPUx86.Registers.ESP, SourceIsIndirect = true };
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new CPUx86.ShiftLeft { DestinationReg = CPUx86.Registers.EAX, SourceValue = 1 };
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new CPUx86.Push { DestinationReg = CPUx86.Registers.EAX };
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}
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else if (xParams.Length == 2 && xParams[0].ParameterType == typeof(char) && xParams[1].ParameterType == typeof(int))
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{
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xHasCalcSize = true;
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new CPUx86.Mov { DestinationReg = CPUx86.Registers.EAX, SourceReg = CPUx86.Registers.ESP, SourceIsIndirect = true };
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new CPUx86.ShiftLeft { DestinationReg = CPUx86.Registers.EAX, SourceValue = 1 };
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new CPUx86.Push { DestinationReg = CPUx86.Registers.EAX };
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}
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else
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throw new NotImplementedException("In NewObj is a string ctor implementation missing!");
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}
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uint xMemSize = GetStorageSize(objectType);
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int xExtraSize = 12; // additional size for set values after alloc
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new CPUx86.Push { DestinationValue = (uint)(xMemSize + xExtraSize) };
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if (xHasCalcSize)
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{
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new CPUx86.Pop { DestinationReg = CPUx86.Registers.EAX };
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new CPUx86.Add { DestinationReg = CPUx86.Registers.ESP, DestinationIsIndirect = true, SourceReg = CPUx86.Registers.EAX };
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}
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// todo: probably we want to check for exceptions after calling Alloc
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new CPUx86.Call { DestinationLabel = LabelName.Get(GCImplementationRefs.AllocNewObjectRef) };
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new CPUx86.Push { DestinationReg = CPUx86.Registers.ESP, DestinationIsIndirect = true };
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new CPUx86.Push { DestinationReg = CPUx86.Registers.ESP, DestinationIsIndirect = true };
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//? ?? uint xObjSize;// = 0;
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//int xGCFieldCount = ( from item in aCtorDeclTypeInfo.Fields.Values
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//where item.NeedsGC
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//select item ).Count();
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//int xGCFieldCount = ( from item in aCtorDeclTypeInfo.Fields.Values
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//where item.NeedsGC
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//select item ).Count();
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int xGCFieldCount = objectType.GetFields().Count(x => x.FieldType.IsValueType);
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// todo: use a cleaner approach here. this class shouldnt assemble the string
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string strTypeId = GetTypeIDLabel(constructor.DeclaringType);
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new CPUx86.Pop { DestinationReg = CPUx86.Registers.EAX };
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new CPUx86.Mov { DestinationReg = CPUx86.Registers.EBX, SourceRef = Cosmos.Assembler.ElementReference.New(strTypeId), SourceIsIndirect = true };
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new CPUx86.Mov { DestinationReg = CPUx86.Registers.EAX, DestinationIsIndirect = true, SourceReg = CPUx86.Registers.EBX };
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new CPUx86.Mov { DestinationReg = CPUx86.Registers.EAX, DestinationIsIndirect = true, DestinationDisplacement = 4, SourceValue = (uint)InstanceTypeEnum.NormalObject, Size = 32 };
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new CPUx86.Mov { DestinationReg = CPUx86.Registers.EAX, DestinationIsIndirect = true, DestinationDisplacement = 8, SourceValue = (uint)xGCFieldCount, Size = 32 };
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uint xSize = (uint)(((from item in xParams
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let xQSize = Align(SizeOfType(item.ParameterType), 4)
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select (int)xQSize).Take(xParams.Length).Sum()));
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foreach (var xParam in xParams)
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{
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uint xParamSize = Align(SizeOfType(xParam.ParameterType), 4);
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new Comment(aAssembler, String.Format("Arg {0}: {1}", xParam.Name, xParamSize));
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for (int i = 0; i < xParamSize; i += 4)
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{
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new CPUx86.Push { DestinationReg = CPUx86.Registers.ESP, DestinationIsIndirect = true, DestinationDisplacement = (int)(xSize + 4) };
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}
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}
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new CPUx86.Call { DestinationLabel = LabelName.Get(constructor) };
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if (aMethod != null)
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{
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new CPUx86.Test { DestinationReg = CPUx86.Registers.ECX, SourceValue = 2 };
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string xNoErrorLabel = currentLabel + ".NoError" + LabelName.LabelCount.ToString();
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new CPUx86.ConditionalJump { Condition = CPUx86.ConditionalTestEnum.Equal, DestinationLabel = xNoErrorLabel };
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//for( int i = 1; i < aCtorMethodInfo.Arguments.Length; i++ )
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//{
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// new CPUx86.Add
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// {
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// DestinationReg = CPUx86.Registers.ESP,
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// SourceValue = ( aCtorMethodInfo.Arguments[ i ].Size % 4 == 0
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// ? aCtorMethodInfo.Arguments[ i ].Size
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// : ( ( aCtorMethodInfo.Arguments[ i ].Size / 4 ) * 4 ) + 1 )
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// };
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//}
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PushAlignedParameterSize(constructor);
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// an exception occurred, we need to cleanup the stack, and jump to the exit
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new CPUx86.Add { DestinationReg = CPUx86.Registers.ESP, SourceValue = 4 };
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//new Comment(aAssembler, "[ Newobj.Execute cleanup start count = " + aAssembler.Stack.Count.ToString() + " ]");
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//foreach( var xStackInt in Assembler.Stack )
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//{
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// new CPUx86.Add { DestinationReg = CPUx86.Registers.ESP, SourceValue = ( uint )xStackInt.Size };
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//}
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uint xESPOffset = 0;
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foreach (var xParam in xParams)
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{
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xESPOffset += Align(SizeOfType(xParam.ParameterType), 4);
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}
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new CPUx86.Add { DestinationReg = CPUx86.Registers.ESP, SourceValue = xESPOffset };
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new Comment(aAssembler, "[ Newobj.Execute cleanup end ]");
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Jump_Exception(aMethod);
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new Label(xNoErrorLabel);
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}
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new CPUx86.Pop { DestinationReg = CPUx86.Registers.EAX };
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//for( int i = 1; i < aCtorMethodInfo.Arguments.Length; i++ )
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//{
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// new CPUx86.Add
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// {
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// DestinationReg = CPUx86.Registers.ESP,
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// SourceValue = ( aCtorMethodInfo.Arguments[ i ].Size % 4 == 0
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// ? aCtorMethodInfo.Arguments[ i ].Size
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// : ( ( aCtorMethodInfo.Arguments[ i ].Size / 4 ) * 4 ) + 1 )
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// };
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//}
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PushAlignedParameterSize(constructor);
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new CPUx86.Push { DestinationReg = CPUx86.Registers.EAX };
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}
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}
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private static void PushAlignedParameterSize(SysReflection.MethodBase aMethod)
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{
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SysReflection.ParameterInfo[] xParams = aMethod.GetParameters();
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uint xSize;
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new Comment("[ Newobj.PushAlignedParameterSize start count = " + xParams.Length.ToString() + " ]");
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for (int i = 0; i < xParams.Length; i++)
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{
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xSize = SizeOfType(xParams[i].ParameterType);
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new CPUx86.Add { DestinationReg = CPUx86.Registers.ESP, SourceValue = Align(xSize, 4) };
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}
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new Comment("[ Newobj.PushAlignedParameterSize end ]");
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}
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}
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}
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