private static PreparedMethodInformation PrepareMethodBody(
IPrepareContext prepareContext,
IMethodInformation method)
{
// TODO: move into MethodInformation
var localVariables = method.LocalVariables.
// If found non named local variable, force named "local[n]__"
GroupBy(variable => variable).
// If contains both named symbol each different scope (in the method by C#'s block), try to named with index number.
SelectMany(g =>
{
var list = g.ToArray();
return((list.Length >= 2) ?
list.Select((variable, index) => new LocalVariableInformation(
method,
variable.Index,
string.Format("{0}{1}", g.Key.UnsafeCLanguageSymbolName, index),
variable.TargetType)) :
new[] { new LocalVariableInformation(
method,
list[0].Index,
string.Format("{0}", g.Key.UnsafeCLanguageSymbolName),
list[0].TargetType) });
}).
OrderBy(e => e.Index).
#if DEBUG
Select((e, index) =>
{
Debug.Assert(e.Index == index);
return(e);
}).
#endif
ToArray();
foreach (var local in localVariables)
{
prepareContext.RegisterType(local.TargetType, method);
}
//////////////////////////////////////////////////////////////////////////////
// Construct decode context
var decodeContext = new DecodeContext(
method,
prepareContext);
//////////////////////////////////////////////////////////////////////////////
// Important:
// It's core decoding sequence.
// The flow analysis can't predict by sequential path.
// So, it reorders by IL offset.
var generators = decodeContext.
Traverse(dc => dc.TryDequeueNextPath() ? dc : null, true).
SelectMany(dc =>
from ilBody in DecodeAndEnumerateILBodies(dc)
let generator = ilBody.ILConverter.Apply(ilBody.Code.Operand, dc)
select new PreparedILBody(
ilBody.Label,
generator,
dc.UniqueCodeBlockIndex,
ilBody.Code,
dc.DecodingPathNumber)).
OrderBy(ilb => ilb.UniqueCodeBlockIndex).
ThenBy(ilb => ilb.Label.Offset).
ToDictionary(ilb => ilb.Label.Offset, ilb => ilb.Generator);
//////////////////////////////////////////////////////////////////////////////
var stacks = decodeContext.
ExtractStacks().
ToArray();
var labelNames = decodeContext.
ExtractLabelNames();
var catchVariables = decodeContext.
ExtractCatchVariables();
var leaveContinuations = decodeContext.
ExtractLeaveContinuations();
return(new PreparedMethodInformation(
method,
stacks,
labelNames,
catchVariables,
leaveContinuations,
generators));
}
private static PreparedFunction PrepareMethod(
IPrepareContext prepareContext,
string methodName,
string rawMethodName,
TypeReference returnType,
Parameter[] parameters,
MethodBody body)
{
var localVariables = body.Variables
// If found non named local variable, force named "local[n]__"
.GroupBy(v => body.Method.DebugInformation.TryGetName(v, out var name) ? name : "local")
// If contains both named symbol each different scope (in the method by C#'s block), try to named with index number.
.SelectMany(g =>
{
var list = g.ToArray();
return((list.Length >= 2)
? list.Select((v, index) => new {
Name = string.Format("{0}{1}", g.Key, index),
Type = v.VariableType,
Index = v.Index
})
: new[] { new {
Name = string.Format("{0}", g.Key),
Type = list[0].VariableType,
Index = list[0].Index
} });
})
.OrderBy(e => e.Index)
.Select((e, index) =>
{
Debug.Assert(e.Index == index);
return(new SymbolInformation(e.Name, e.Type));
})
.ToArray();
foreach (var local in localVariables)
{
prepareContext.RegisterType(local.TargetType);
}
var decodeContext = new DecodeContext(
body.Method.Module,
methodName,
returnType,
parameters,
localVariables,
body.Instructions.ToArray(),
prepareContext);
// It gathers sequence point informations.
// It will use writing the line preprocessor directive.
var sequencePoints =
(from sp in body.Method.DebugInformation.SequencePoints
where !sp.IsHidden
group sp by sp.Offset into g
let sps = g.OrderBy(sp => sp.Offset).ToArray()
where sps.Length >= 1
select new { g.Key, sps })
.ToDictionary(g => g.Key, g => g.sps);
// Important:
// It's core decoding sequence.
// The flow analysis can't predict by sequential path.
// So, it reorders by IL offset.
var preparedILBodies = decodeContext
.Traverse(dc => dc.TryDequeueNextPath() ? dc : null, true)
.SelectMany(dc =>
from ilBody in DecodeAndEnumerateILBodies(dc)
let sps = sequencePoints.UnsafeGetValue(ilBody.Label.Offset, empty)
let generator = ilBody.ILConverter.Apply(ilBody.Operand, dc)
select new PreparedILBody(
ilBody.Label,
generator,
dc.UniqueCodeBlockIndex,
sps,
ilBody.ILConverter.OpCode,
ilBody.Operand,
dc.DecodingPathNumber))
.OrderBy(ilb => ilb.UniqueCodeBlockIndex)
.ThenBy(ilb => ilb.Label.Offset)
.ToArray();
var stacks = decodeContext
.ExtractStacks()
.ToArray();
var labelNames = decodeContext
.ExtractLabelNames();
return(new PreparedFunction(
methodName,
rawMethodName,
returnType,
parameters,
preparedILBodies,
localVariables,
stacks,
labelNames,
body.Method.IsVirtual ? (int?)body.Method.GetMethodOverloadIndex() : null));
}