/// <summary>
/// Interprets a raw method body to a CILMethodBody, disassembling all instructions, obtaining the local variables
/// and reading the extra sections for exception handlers.
/// </summary>
/// <param name="method">The parent method the method body is associated to.</param>
/// <param name="rawMethodBody">The raw method body to convert.</param>
/// <returns>The converted method body.</returns>
public static CilMethodBody FromRawMethodBody(MethodDefinition method, CilRawMethodBody rawMethodBody)
{
var body = new CilMethodBody(method);
var fatBody = rawMethodBody as CilRawFatMethodBody;
if (fatBody != null)
{
// Read fat method body header fields.
body.MaxStack = fatBody.MaxStack;
body.InitLocals = fatBody.InitLocals;
if (method.Image.TryResolveMember(new MetadataToken(fatBody.LocalVarSigToken), out var signature))
{
body.Signature = signature as StandAloneSignature;
}
}
else
{
// Set values for tiny method bodies.
body.MaxStack = 8;
body.InitLocals = false;
}
// Read code.
var codeReader = new MemoryStreamReader(rawMethodBody.Code);
var disassembler = new CilDisassembler(codeReader, body);
foreach (var instruction in disassembler.Disassemble())
{
body.Instructions.Add(instruction);
}
if (fatBody != null)
{
// Read exception handlers.
foreach (var section in fatBody.ExtraSections)
{
var sectionReader = new MemoryStreamReader(section.Data);
while (sectionReader.CanRead(section.IsFat
? ExceptionHandler.FatExceptionHandlerSize
: ExceptionHandler.SmallExceptionHandlerSize))
{
body.ExceptionHandlers.Add(ExceptionHandler.FromReader(body, sectionReader, section.IsFat));
}
}
}
return(body);
}
