static MetadataToken GetLocalVarToken (ByteBuffer buffer, MethodSymbols symbols)
{
if (symbols.variables.IsNullOrEmpty ())
return MetadataToken.Zero;
buffer.position = 8;
return new MetadataToken (buffer.ReadUInt32 ());
}
public ByteBuffer PatchRawMethodBody (MethodDefinition method, CodeWriter writer, out MethodSymbols symbols)
{
var buffer = new ByteBuffer ();
symbols = new MethodSymbols (method.Name);
this.method = method;
reader.context = method;
MoveTo (method.RVA);
var flags = ReadByte ();
MetadataToken local_var_token;
switch (flags & 0x3) {
case 0x2: // tiny
buffer.WriteByte (flags);
local_var_token = MetadataToken.Zero;
symbols.code_size = flags >> 2;
PatchRawCode (buffer, symbols.code_size, writer);
break;
case 0x3: // fat
base.position--;
PatchRawFatMethod (buffer, symbols, writer, out local_var_token);
break;
default:
throw new NotSupportedException ();
}
var symbol_reader = reader.module.SymbolReader;
if (symbol_reader != null && writer.metadata.write_symbols) {
symbols.method_token = GetOriginalToken (writer.metadata, method);
symbols.local_var_token = local_var_token;
symbol_reader.Read (symbols);
}
return buffer;
}
void PatchRawFatMethod (ByteBuffer buffer, MethodSymbols symbols, CodeWriter writer, out MetadataToken local_var_token)
{
var flags = ReadUInt16 ();
buffer.WriteUInt16 (flags);
buffer.WriteUInt16 (ReadUInt16 ());
symbols.code_size = ReadInt32 ();
buffer.WriteInt32 (symbols.code_size);
local_var_token = ReadToken ();
if (local_var_token.RID > 0) {
var variables = symbols.variables = ReadVariables (local_var_token);
buffer.WriteUInt32 (variables != null
? writer.GetStandAloneSignature (symbols.variables).ToUInt32 ()
: 0);
} else
buffer.WriteUInt32 (0);
PatchRawCode (buffer, symbols.code_size, writer);
if ((flags & 0x8) != 0)
PatchRawSection (buffer, writer.metadata);
}
void ReadLines (PdbLines lines, MethodSymbols symbols)
{
for (int i = 0; i < lines.lines.Length; i++) {
var line = lines.lines [i];
symbols.Instructions.Add (new InstructionSymbol ((int) line.offset, new SequencePoint (GetDocument (lines.file)) {
StartLine = (int) line.lineBegin,
StartColumn = (int) line.colBegin,
EndLine = (int) line.lineEnd,
EndColumn = (int) line.colEnd,
}));
}
}
void ReadSequencePoints (PdbFunction function, MethodSymbols symbols)
{
if (function.lines == null)
return;
foreach (PdbLines lines in function.lines)
ReadLines (lines, symbols);
}
void ReadLocals (PdbScope scope, MethodSymbols symbols)
{
if (scope == null)
return;
foreach (var slot in scope.slots) {
int index = (int) slot.slot;
if (index < 0 || index >= symbols.Variables.Count)
continue;
var variable = symbols.Variables [index];
variable.Name = slot.name;
}
ReadLocals (scope.scopes, symbols);
}
void ReadLocals (PdbScope [] scopes, MethodSymbols symbols)
{
foreach (var scope in scopes)
ReadLocals (scope, symbols);
}
public void Read (MethodSymbols symbols)
{
PdbFunction function;
if (!functions.TryGetValue (symbols.MethodToken.ToUInt32 (), out function))
return;
ReadSequencePoints (function, symbols);
ReadLocals (function.scopes, symbols);
}