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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Text;
using Internal.TypeSystem;
namespace Internal.IL
{
internal sealed class MethodILDebugView
{
private readonly MethodIL _methodIL;
public MethodILDebugView(MethodIL methodIL)
{
_methodIL = methodIL;
}
public string Disassembly
{
get
{
ILDisassembler disasm = new ILDisassembler(_methodIL);
StringBuilder sb = new StringBuilder();
MethodDesc owningMethod = _methodIL.OwningMethod;
sb.Append("// ");
sb.AppendLine(owningMethod.ToString());
sb.Append(".method ");
// TODO: accessibility, specialname, calling conventions etc.
if (!owningMethod.Signature.IsStatic)
sb.Append("instance ");
disasm.AppendType(sb, owningMethod.Signature.ReturnType);
sb.Append(' ');
sb.Append(owningMethod.Name);
if (owningMethod.HasInstantiation)
{
sb.Append('<');
for (int i = 0; i < owningMethod.Instantiation.Length; i++)
{
if (i != 0)
sb.Append(", ");
disasm.AppendType(sb, owningMethod.Instantiation[i]);
}
sb.Append('>');
}
sb.Append('(');
for (int i = 0; i < owningMethod.Signature.Length; i++)
{
if (i != 0)
sb.Append(", ");
disasm.AppendType(sb, owningMethod.Signature[i]);
}
sb.AppendLine(") cil managed");
sb.AppendLine("{");
sb.Append(" // Code size: ");
sb.Append(disasm.CodeSize);
sb.AppendLine();
sb.Append(" .maxstack ");
sb.Append(_methodIL.MaxStack);
sb.AppendLine();
LocalVariableDefinition[] locals = _methodIL.GetLocals();
if (locals != null && locals.Length > 0)
{
sb.Append(" .locals ");
if (_methodIL.IsInitLocals)
sb.Append("init ");
sb.Append('(');
for (int i = 0; i < locals.Length; i++)
{
if (i != 0)
{
sb.AppendLine(",");
sb.Append(' ', 6);
}
disasm.AppendType(sb, locals[i].Type);
sb.Append(' ');
if (locals[i].IsPinned)
sb.Append("pinned ");
sb.Append("V_");
sb.Append(i);
}
sb.AppendLine(")");
}
sb.AppendLine();
const string pad = " ";
// TODO: pretty exception regions
foreach (ILExceptionRegion region in _methodIL.GetExceptionRegions())
{
sb.Append(pad);
sb.Append(".try ");
ILDisassembler.AppendOffset(sb, region.TryOffset);
sb.Append(" to ");
ILDisassembler.AppendOffset(sb, region.TryOffset + region.TryLength);
switch (region.Kind)
{
case ILExceptionRegionKind.Catch:
sb.Append(" catch ");
disasm.AppendType(sb, (TypeDesc)_methodIL.GetObject(region.ClassToken));
break;
case ILExceptionRegionKind.Fault:
sb.Append(" fault");
break;
case ILExceptionRegionKind.Filter:
sb.Append(" filter ");
ILDisassembler.AppendOffset(sb, region.FilterOffset);
break;
case ILExceptionRegionKind.Finally:
sb.Append(" finally");
break;
}
sb.Append(" handler ");
ILDisassembler.AppendOffset(sb, region.HandlerOffset);
sb.Append(" to ");
ILDisassembler.AppendOffset(sb, region.HandlerOffset + region.HandlerLength);
sb.AppendLine();
}
while (disasm.HasNextInstruction)
{
sb.Append(pad);
sb.AppendLine(disasm.GetNextInstruction());
}
sb.AppendLine("}");
return sb.ToString();
}
}
}
}
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