public static void Convert(Stream peStream, Stream sourcePdbStream, Stream targetPdbStream)
{
var metadataBuilder = new MetadataBuilder();
ImmutableArray <int> typeSystemRowCounts;
var debugEntryPointToken = default(MethodDefinitionHandle);
var pdbId = default(BlobContentId);
try
{
using (var peReader = new PEReader(peStream))
{
pdbId = ReadPdbId(peReader);
var symReader = SymReaderFactory.CreateWindowsPdbReader(sourcePdbStream, peReader);
var metadataReader = peReader.GetMetadataReader();
var metadataModel = new MetadataModel(metadataReader);
typeSystemRowCounts = metadataModel.GetRowCounts();
debugEntryPointToken = ReadEntryPointHandle(symReader);
// documents:
var documentIndex = new Dictionary <string, DocumentHandle>(StringComparer.Ordinal);
var documents = symReader.GetDocuments();
metadataBuilder.SetCapacity(TableIndex.Document, documents.Length);
bool vbSemantics = false;
foreach (var document in documents)
{
string name = document.GetName();
Guid language = document.GetLanguage();
// TODO:
// won't work for IL-merged assmemblies
vbSemantics |= language == SymReaderHelpers.VisualBasicLanguageGuid;
var rid = metadataBuilder.AddDocument(
name: metadataBuilder.GetOrAddDocumentName(name),
hashAlgorithm: metadataBuilder.GetOrAddGuid(document.GetHashAlgorithm()),
hash: metadataBuilder.GetOrAddBlob(document.GetChecksum()),
language: metadataBuilder.GetOrAddGuid(language));
documentIndex.Add(name, rid);
}
var lastLocalVariableHandle = default(LocalVariableHandle);
var lastLocalConstantHandle = default(LocalConstantHandle);
var importStringsByMethod = new Dictionary <int, ImmutableArray <string> >();
var importScopesByMethod = new Dictionary <int, ImportScopeHandle>();
// Maps import scope content to import scope handles
var importScopeIndex = new Dictionary <ImportScopeInfo, ImportScopeHandle>();
var importScopes = new List <ImportScopeInfo>();
// reserve slot for module import scope:
importScopes.Add(default(ImportScopeInfo));
var externAliasImports = new List <ImportInfo>();
var externAliasStringSet = new HashSet <string>(StringComparer.Ordinal);
string vbDefaultNamespace = null;
var vbProjectLevelImports = new List <ImportInfo>();
// first pass:
foreach (var methodHandle in metadataReader.MethodDefinitions)
{
int methodToken = MetadataTokens.GetToken(methodHandle);
ImmutableArray <ImmutableArray <ImportInfo> > importGroups;
if (vbSemantics)
{
var importStrings = CustomDebugInfoReader.GetVisualBasicImportStrings(
methodToken,
symReader,
getMethodImportStrings: (token, sr) => GetImportStrings(token, importStringsByMethod, sr));
if (importStrings.IsEmpty)
{
// no debug info
continue;
}
var vbFileLevelImports = ArrayBuilder <ImportInfo> .GetInstance();
foreach (var importString in importStrings)
{
if (TryParseImportString(importString, out var import, vbSemantics: true))
{
if (import.Kind == ImportTargetKind.DefaultNamespace)
{
vbDefaultNamespace = import.Target;
}
else if (import.Scope == VBImportScopeKind.Project)
{
vbProjectLevelImports.Add(import);
}
else
{
vbFileLevelImports.Add(import);
}
}
}
importGroups = ImmutableArray.Create(vbFileLevelImports.ToImmutableAndFree());
}
else
{
var importStringGroups = CustomDebugInfoReader.GetCSharpGroupedImportStrings(
methodToken,
symReader,
getMethodCustomDebugInfo: (token, sr) => sr.GetCustomDebugInfo(token, methodVersion: 1),
getMethodImportStrings: (token, sr) => GetImportStrings(token, importStringsByMethod, sr),
externAliasStrings: out var localExternAliasStrings);
if (importStringGroups.IsDefault)
{
// no debug info
continue;
}
if (!localExternAliasStrings.IsDefault)
{
foreach (var externAlias in localExternAliasStrings)
{
if (externAliasStringSet.Add(externAlias) &&
TryParseImportString(externAlias, out var import, vbSemantics: false))
{
externAliasImports.Add(import);
}
}
}
importGroups = ImmutableArray.CreateRange(importStringGroups.Select(g => ParseImportStrings(g, vbSemantics: false)));
}
var importScopeHandle = DefineImportScope(importGroups, importScopeIndex, importScopes);
importScopesByMethod.Add(methodToken, importScopeHandle);
}
// import scopes:
metadataBuilder.AddImportScope(
parentScope: default(ImportScopeHandle),
imports: SerializeModuleImportScope(metadataBuilder, externAliasImports, vbProjectLevelImports, vbDefaultNamespace, metadataModel));
for (int i = 1; i < importScopes.Count; i++)
{
metadataBuilder.AddImportScope(
parentScope: importScopes[i].Parent,
imports: SerializeImportsBlob(metadataBuilder, importScopes[i].Imports, metadataModel));
}
var dynamicNames = new Dictionary <string, DynamicLocalInfo>();
var dynamicSlots = new Dictionary <int, DynamicLocalInfo>();
// methods:
metadataBuilder.SetCapacity(TableIndex.MethodDebugInformation, metadataReader.MethodDefinitions.Count);
foreach (var methodHandle in metadataReader.MethodDefinitions)
{
var methodDef = metadataReader.GetMethodDefinition(methodHandle);
int methodToken = MetadataTokens.GetToken(methodHandle);
var symMethod = symReader.GetMethod(methodToken);
if (symMethod == null)
{
metadataBuilder.AddMethodDebugInformation(default(DocumentHandle), sequencePoints: default(BlobHandle));
continue;
}
// method debug info:
int localSignatureRowId;
if (methodDef.RelativeVirtualAddress != 0)
{
var methodBody = peReader.GetMethodBody(methodDef.RelativeVirtualAddress);
localSignatureRowId = methodBody.LocalSignature.IsNil ? 0 : MetadataTokens.GetRowNumber(methodBody.LocalSignature);
}
else
{
localSignatureRowId = 0;
}
var symSequencePoints = symMethod.GetSequencePoints().ToImmutableArray();
DocumentHandle singleDocumentHandle;
BlobHandle sequencePointsBlob = SerializeSequencePoints(metadataBuilder, localSignatureRowId, symSequencePoints, documentIndex, out singleDocumentHandle);
metadataBuilder.AddMethodDebugInformation(
document: singleDocumentHandle,
sequencePoints: sequencePointsBlob);
// state machine and async info:
var symAsyncMethod = symMethod.AsAsyncMethod();
if (symAsyncMethod != null)
{
var kickoffToken = MetadataTokens.Handle(symAsyncMethod.GetKickoffMethod());
metadataBuilder.AddStateMachineMethod(
moveNextMethod: methodHandle,
kickoffMethod: (MethodDefinitionHandle)kickoffToken);
metadataBuilder.AddCustomDebugInformation(
parent: methodHandle,
kind: metadataBuilder.GetOrAddGuid(PortableCustomDebugInfoKinds.AsyncMethodSteppingInformationBlob),
value: SerializeAsyncMethodSteppingInfo(metadataBuilder, symAsyncMethod, MetadataTokens.GetRowNumber(methodHandle)));
}
// custom debug information:
var dynamicLocals = default(ImmutableArray <DynamicLocalInfo>);
byte[] customDebugInfoBytes = symReader.GetCustomDebugInfo(methodToken, methodVersion: 1);
if (customDebugInfoBytes != null)
{
foreach (var record in CustomDebugInfoReader.GetCustomDebugInfoRecords(customDebugInfoBytes))
{
switch (record.Kind)
{
case CustomDebugInfoKind.DynamicLocals:
dynamicLocals = CustomDebugInfoReader.DecodeDynamicLocalsRecord(record.Data);
break;
case CustomDebugInfoKind.StateMachineHoistedLocalScopes:
metadataBuilder.AddCustomDebugInformation(
parent: methodHandle,
kind: metadataBuilder.GetOrAddGuid(PortableCustomDebugInfoKinds.EncLocalSlotMap),
value: SerializeStateMachineHoistedLocalsBlob(metadataBuilder, CustomDebugInfoReader.DecodeStateMachineHoistedLocalScopesRecord(record.Data)));
break;
case CustomDebugInfoKind.EditAndContinueLocalSlotMap:
metadataBuilder.AddCustomDebugInformation(
parent: methodHandle,
kind: metadataBuilder.GetOrAddGuid(PortableCustomDebugInfoKinds.EncLocalSlotMap),
value: metadataBuilder.GetOrAddBlob(record.Data));
break;
case CustomDebugInfoKind.EditAndContinueLambdaMap:
metadataBuilder.AddCustomDebugInformation(
parent: methodHandle,
kind: metadataBuilder.GetOrAddGuid(PortableCustomDebugInfoKinds.EncLambdaAndClosureMap),
value: metadataBuilder.GetOrAddBlob(record.Data));
break;
}
}
}
var rootScope = symMethod.GetRootScope();
if (rootScope.GetNamespaces().Length == 0 || rootScope.GetLocals().Length == 0 || rootScope.GetConstants().Length == 0)
{
dynamicNames.Clear();
dynamicSlots.Clear();
foreach (var dynamicLocal in dynamicLocals)
{
if (dynamicLocal.SlotId == 0)
{
// All dynamic constants have slot id == 0,
// but a variable can also have slot id == 0
if (!dynamicNames.ContainsKey(dynamicLocal.LocalName))
{
dynamicNames.Add(dynamicLocal.LocalName, dynamicLocal);
}
else
{
// TODO: warning
}
}
else if (!dynamicSlots.ContainsKey(dynamicLocal.SlotId))
{
dynamicSlots.Add(dynamicLocal.SlotId, dynamicLocal);
}
else
{
// TODO: warning
}
}
foreach (ISymUnmanagedScope scope in rootScope.GetChildren())
{
SerializeScope(
metadataBuilder,
metadataModel,
methodHandle,
importScopesByMethod[methodToken],
scope,
dynamicSlots,
dynamicNames,
vbSemantics,
ref lastLocalVariableHandle,
ref lastLocalConstantHandle);
}
}
else
{
// TODO: warning:
// "Root scope must be empty (method 0x{0:x8})", MetadataTokens.GetToken(methodHandle))
}
}
}
}
catch (COMException e)
{
// TODO: loc
throw new BadImageFormatException("Invalid PDB format: " + e.Message, e);
}
var serializer = new PortablePdbBuilder(metadataBuilder, typeSystemRowCounts, debugEntryPointToken, idProvider: _ => pdbId);
BlobBuilder blobBuilder = new BlobBuilder();
serializer.Serialize(blobBuilder);
blobBuilder.WriteContentTo(targetPdbStream);
}
/// <summary>
/// Checks whether given PDB stream has Portable format.
/// </summary>
/// <param name="pdbStream">Stream.</param>
/// <returns>Returns true if the given stream starts with a Portable PDB signature.</returns>
/// <exception cref="ArgumentException"><paramref name="pdbStream"/> does not support read and seek operations.</exception>
/// <exception cref="ArgumentNullException"><paramref name="pdbStream"/> is null.</exception>
/// <exception cref="IOException">IO error while reading from or writing to a stream.</exception>
/// <exception cref="ObjectDisposedException">Stream has been disposed while reading.</exception>
public static bool IsPortable(Stream pdbStream)
{
StreamUtilities.ValidateStream(pdbStream, nameof(pdbStream), readRequired: true, seekRequired: true);
return(SymReaderFactory.IsPortable(pdbStream));
}
