SymbolScopeImpl ReadScope(uint methodRid, GenericParamContext gpContext)
{
var scopesRidList = pdbMetadata.GetLocalScopeRidList(methodRid);
SymbolScopeImpl rootScopeOrNull = null;
if (scopesRidList.Count != 0)
{
var custInfos = ListCache <PdbCustomDebugInfo> .AllocList();
var stack = ListCache <SymbolScopeImpl> .AllocList();
var importScopeBlobReader = new ImportScopeBlobReader(module, pdbMetadata.BlobStream);
for (int i = 0; i < scopesRidList.Count; i++)
{
var rid = scopesRidList[i];
int token = new MDToken(Table.LocalScope, rid).ToInt32();
bool b = pdbMetadata.TablesStream.TryReadLocalScopeRow(rid, out var row);
Debug.Assert(b);
uint startOffset = row.StartOffset;
uint endOffset = startOffset + row.Length;
SymbolScopeImpl parent = null;
while (stack.Count > 0)
{
var nextParent = stack[stack.Count - 1];
if (startOffset >= nextParent.StartOffset && endOffset <= nextParent.EndOffset)
{
parent = nextParent;
break;
}
stack.RemoveAt(stack.Count - 1);
}
Debug.Assert(parent != null || rootScopeOrNull == null);
custInfos.Clear();
GetCustomDebugInfos(token, gpContext, custInfos);
var customDebugInfos = custInfos.Count == 0 ? Array2.Empty <PdbCustomDebugInfo>() : custInfos.ToArray();
var scope = new SymbolScopeImpl(this, parent, (int)startOffset, (int)endOffset, customDebugInfos);
if (rootScopeOrNull == null)
{
rootScopeOrNull = scope;
}
stack.Add(scope);
if (parent != null)
{
parent.childrenList.Add(scope);
}
scope.importScope = ReadPdbImportScope(ref importScopeBlobReader, row.ImportScope, gpContext);
GetEndOfLists(rid, out uint variableListEnd, out uint constantListEnd);
ReadVariables(scope, gpContext, row.VariableList, variableListEnd);
ReadConstants(scope, row.ConstantList, constantListEnd);
}
ListCache <SymbolScopeImpl> .Free(ref stack);
ListCache <PdbCustomDebugInfo> .Free(ref custInfos);
}
return(rootScopeOrNull ?? new SymbolScopeImpl(this, null, 0, int.MaxValue, Array2.Empty <PdbCustomDebugInfo>()));
}
PdbImportScope ReadPdbImportScope(ref ImportScopeBlobReader importScopeBlobReader, uint importScope, GenericParamContext gpContext)
{
if (importScope == 0)
{
return(null);
}
const int MAX = 1000;
PdbImportScope result = null;
PdbImportScope prevScope = null;
for (int i = 0; importScope != 0; i++)
{
Debug.Assert(i < MAX);
if (i >= MAX)
{
return(null);
}
int token = new MDToken(Table.ImportScope, importScope).ToInt32();
if (!pdbMetadata.TablesStream.TryReadImportScopeRow(importScope, out var row))
{
return(null);
}
var scope = new PdbImportScope();
GetCustomDebugInfos(token, gpContext, scope.CustomDebugInfos);
if (result == null)
{
result = scope;
}
if (prevScope != null)
{
prevScope.Parent = scope;
}
importScopeBlobReader.Read(row.Imports, scope.Imports);
prevScope = scope;
importScope = row.Parent;
}
return(result);
}