public void SerializeDebugInfo(IMethodBody methodBody, uint localSignatureToken, CustomDebugInfoWriter customDebugInfoWriter)
{
Debug.Assert(_metadataWriter != null);
bool isIterator = methodBody.StateMachineTypeName != null;
bool emitDebugInfo = isIterator || methodBody.HasAnySequencePoints;
if (!emitDebugInfo)
{
return;
}
uint methodToken = _metadataWriter.GetMethodToken(methodBody.MethodDefinition);
OpenMethod(methodToken);
var localScopes = methodBody.LocalScopes;
// CCI originally didn't have the notion of the default scope that is open
// when a method is opened. In order to reproduce CSC PDBs, this must be added. Otherwise
// a seemingly unnecessary scope that contains only other scopes is put in the PDB.
if (localScopes.Length > 0)
{
this.DefineScopeLocals(localScopes[0], localSignatureToken);
}
// NOTE: This is an attempt to match Dev10's apparent behavior. For iterator methods (i.e. the method
// that appears in source, not the synthesized ones), Dev10 only emits the ForwardIterator and IteratorLocal
// custom debug info (e.g. there will be no information about the usings that were in scope).
if (!isIterator)
{
IMethodDefinition forwardToMethod;
if (customDebugInfoWriter.ShouldForwardNamespaceScopes(Context, methodBody, methodToken, out forwardToMethod))
{
if (forwardToMethod != null)
{
UsingNamespace("@" + _metadataWriter.GetMethodToken(forwardToMethod), methodBody.MethodDefinition);
}
// otherwise, the forwarding is done via custom debug info
}
else
{
this.DefineNamespaceScopes(methodBody);
}
}
DefineLocalScopes(localScopes, localSignatureToken);
EmitSequencePoints(methodBody.GetSequencePoints());
AsyncMethodBodyDebugInfo asyncDebugInfo = methodBody.AsyncDebugInfo;
if (asyncDebugInfo != null)
{
SetAsyncInfo(
methodToken,
_metadataWriter.GetMethodToken(asyncDebugInfo.KickoffMethod),
asyncDebugInfo.CatchHandlerOffset,
asyncDebugInfo.YieldOffsets,
asyncDebugInfo.ResumeOffsets);
}
var compilationOptions = Context.ModuleBuilder.CommonCompilation.Options;
// We need to avoid emitting CDI DynamicLocals = 5 and EditAndContinueLocalSlotMap = 6 for files processed by WinMDExp until
// bug #1067635 is fixed and available in SDK.
bool suppressNewCustomDebugInfo = !compilationOptions.ExtendedCustomDebugInformation ||
(compilationOptions.OutputKind == OutputKind.WindowsRuntimeMetadata);
bool emitEncInfo = compilationOptions.EnableEditAndContinue && !_metadataWriter.IsFullMetadata;
bool emitExternNamespaces;
byte[] blob = customDebugInfoWriter.SerializeMethodDebugInfo(Context, methodBody, methodToken, emitEncInfo, suppressNewCustomDebugInfo, out emitExternNamespaces);
if (blob != null)
{
DefineCustomMetadata("MD2", blob);
}
if (emitExternNamespaces)
{
this.DefineAssemblyReferenceAliases();
}
// TODO: it's not clear why we are closing a scope here with IL length:
CloseScope(methodBody.IL.Length);
CloseMethod();
}