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PdbConverterPortableToWindows.cs
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PdbConverterPortableToWindows.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the License.txt file in the project root for more information.
using System;
using System.Collections.Generic;
using System.Collections.Immutable;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Reflection.Metadata;
using System.Reflection.Metadata.Ecma335;
using System.Reflection.PortableExecutable;
using System.Runtime.CompilerServices;
using System.Text;
using System.Text.Json;
using System.Text.RegularExpressions;
using Microsoft.CodeAnalysis.Collections;
using Microsoft.CodeAnalysis.Debugging;
using Microsoft.CodeAnalysis.PooledObjects;
using Microsoft.DiaSymReader.PortablePdb;
using Microsoft.SourceLink.Tools;
using Roslyn.Utilities;
namespace Microsoft.DiaSymReader.Tools
{
internal sealed class PdbConverterPortableToWindows
{
private readonly Action<PdbDiagnostic>? _diagnosticReporter;
public PdbConverterPortableToWindows(Action<PdbDiagnostic>? diagnosticReporter)
{
_diagnosticReporter = diagnosticReporter;
}
private void ReportDiagnostic(PdbDiagnosticId id, int token, params object[] args)
{
_diagnosticReporter?.Invoke(new PdbDiagnostic(id, token, args));
}
/// <summary>
/// This is the maximum length of a string in the PDB, assuming it is in UTF-8 format
/// and not (yet) null-terminated.
/// </summary>
/// <remarks>
/// Used for import strings, locals, and local constants.
/// </remarks>
private const int MaxEntityNameLength = 2046;
private static Guid GetLanguageVendorGuid(Guid languageGuid)
{
return (languageGuid == PdbGuids.Language.CSharp || languageGuid == PdbGuids.Language.VisualBasic || languageGuid == PdbGuids.Language.FSharp) ?
PdbGuids.LanguageVendor.Microsoft : default;
}
private readonly struct LocalScopeInfo
{
public readonly LocalScope? LocalScope;
public readonly int HoistedVariableStartIndex;
public readonly int HoistedVariableEndIndex;
public LocalScopeInfo(LocalScope? localScope, int hoistedVariableStartIndex, int hoistedVariableEndIndex)
{
LocalScope = localScope;
HoistedVariableStartIndex = hoistedVariableStartIndex;
HoistedVariableEndIndex = hoistedVariableEndIndex;
}
public bool IsDefault => !IsLocalScope && !IsHoistedScope;
public bool IsLocalScope => LocalScope.HasValue;
public bool IsHoistedScope => HoistedVariableStartIndex < HoistedVariableEndIndex;
}
internal void Convert(PEReader peReader, MetadataReader pdbReader, SymUnmanagedWriter pdbWriter, PortablePdbConversionOptions options)
{
if (!SymReaderHelpers.TryReadPdbId(peReader, out var pePdbId, out int peAge))
{
throw new InvalidDataException(ConverterResources.SpecifiedPEFileHasNoAssociatedPdb);
}
if (pdbReader.DebugMetadataHeader == null || !new BlobContentId(pdbReader.DebugMetadataHeader.Id).Equals(pePdbId))
{
throw new InvalidDataException(ConverterResources.PdbNotMatchingDebugDirectory);
}
string? vbDefaultNamespace = MetadataUtilities.GetVisualBasicDefaultNamespace(pdbReader);
bool vbSemantics = vbDefaultNamespace != null;
string? vbDefaultNamespaceImportString = string.IsNullOrEmpty(vbDefaultNamespace) ? null : "*" + vbDefaultNamespace;
var metadataReader = peReader.GetMetadataReader();
var metadataModel = new MetadataModel(metadataReader, vbSemantics);
var nonEmbeddedDocumentNames = new ArrayBuilder<string>(pdbReader.Documents.Count);
var symSequencePointsWriter = new SymUnmanagedSequencePointsWriter(pdbWriter, capacity: 64);
var declaredExternAliases = new HashSet<string>();
var importStringsBuilder = new List<string>();
var importGroups = new List<int>();
var cdiBuilder = new BlobBuilder();
var dynamicLocals = new List<(string LocalName, byte[] Flags, int Count, int SlotIndex)>();
var tupleLocals = new List<(string LocalName, int SlotIndex, int ScopeStart, int ScopeEnd, ImmutableArray<string?> Names)>();
var openScopeEndOffsets = new Stack<int>();
// state for calculating import string forwarding:
var lastImportScopeHandle = default(ImportScopeHandle);
var vbLastImportScopeNamespace = default(string);
var lastImportScopeMethodDefHandle = default(MethodDefinitionHandle);
var importStringsMap = new Dictionary<ImmutableArray<string>, MethodDefinitionHandle>(SequenceComparer<string>.Instance);
var aliasedAssemblyRefs = GetAliasedAssemblyRefs(pdbReader);
pdbWriter.DocumentTableCapacity = pdbReader.Documents.Count;
foreach (var documentHandle in pdbReader.Documents)
{
var document = pdbReader.GetDocument(documentHandle);
var languageGuid = pdbReader.GetGuid(document.Language);
var name = pdbReader.GetString(document.Name);
var embeddedSourceHandle = pdbReader.GetCustomDebugInformation(documentHandle, PortableCustomDebugInfoKinds.EmbeddedSource);
var sourceBlob = embeddedSourceHandle.IsNil ? null : pdbReader.GetBlobBytes(embeddedSourceHandle);
if (embeddedSourceHandle.IsNil)
{
nonEmbeddedDocumentNames.Add(name);
}
var algorithmId = pdbReader.GetGuid(document.HashAlgorithm);
var checksum = pdbReader.GetBlobBytes(document.Hash);
ValidateAndCorrectSourceChecksum(ref algorithmId, checksum, name);
pdbWriter.DefineDocument(
name: name,
language: languageGuid,
vendor: GetLanguageVendorGuid(languageGuid),
type: PdbGuids.DocumentType.Text,
algorithmId: algorithmId,
checksum: checksum,
source: sourceBlob);
}
int localScopeRowNumber = 0;
int localScopeCount = pdbReader.GetTableRowCount(TableIndex.LocalScope);
static int CompareScopeRanges(int leftStart, int leftEnd, int rightStart, int rightEnd)
{
int result = leftStart.CompareTo(rightStart);
return (result != 0) ? result : rightEnd.CompareTo(leftEnd);
}
// Handle of the method that is gonna contain list of AssemblyRef aliases.
// Other methods will forward to it.
var methodDefHandleWithAssemblyRefAliases = default(MethodDefinitionHandle);
foreach (var methodDebugInfoHandle in pdbReader.MethodDebugInformation)
{
var methodDebugInfo = pdbReader.GetMethodDebugInformation(methodDebugInfoHandle);
var methodDefHandle = methodDebugInfoHandle.ToDefinitionHandle();
int methodToken = MetadataTokens.GetToken(methodDefHandle);
var methodDef = metadataReader.GetMethodDefinition(methodDefHandle);
#if DEBUG
var declaringTypeDef = metadataReader.GetTypeDefinition(methodDef.GetDeclaringType());
var typeName = metadataReader.GetString(declaringTypeDef.Name);
var methodName = metadataReader.GetString(methodDef.Name);
#endif
bool methodOpened = false;
var methodBodyOpt = (methodDef.RelativeVirtualAddress != 0 && (methodDef.ImplAttributes & MethodImplAttributes.CodeTypeMask) == MethodImplAttributes.Managed) ?
peReader.GetMethodBody(methodDef.RelativeVirtualAddress) : null;
var vbCurrentMethodNamespace = vbSemantics ? GetMethodNamespace(metadataReader, methodDef) : null;
var moveNextHandle = metadataModel.FindStateMachineMoveNextMethod(methodDefHandle, vbSemantics);
bool isKickOffMethod = !moveNextHandle.IsNil;
var hoistedLocalScopes = isKickOffMethod ? default : GetStateMachineHoistedLocalScopes(pdbReader, methodDefHandle);
int vbHoistedScopeIndex = -1;
ImmutableArray<(StateMachineHoistedLocalScope Scope, int Index)> vbHoistedScopes;
// Names of local variables hoisted to state machine fields indexed by variable slot index extracted from the field name.
ImmutableArray<string> vbResumableLocalNames;
if (vbSemantics && !hoistedLocalScopes.IsDefault)
{
// we are in MoveNext method
vbHoistedScopes = hoistedLocalScopes.SelectWithIndex().Where(s => !s.Value.IsDefault).ToImmutableArray().
Sort((left, right) => CompareScopeRanges(left.Value.StartOffset, left.Value.EndOffset, right.Value.StartOffset, right.Value.EndOffset));
vbResumableLocalNames = metadataModel.GetVisualBasicHoistedLocalNames(methodDef.GetDeclaringType());
}
else
{
vbHoistedScopes = default;
vbResumableLocalNames = default;
}
var forwardImportScopesToMethodDef = default(MethodDefinitionHandle);
Debug.Assert(dynamicLocals.Count == 0);
Debug.Assert(tupleLocals.Count == 0);
Debug.Assert(openScopeEndOffsets.Count == 0);
void LazyOpenMethod()
{
if (!methodOpened)
{
#if DEBUG
Debug.WriteLine($"Open Method '{typeName}::{methodName}' {methodToken:X8}");
#endif
pdbWriter.OpenMethod(methodToken);
methodOpened = true;
}
}
LocalScopeInfo GetNextLocalScope()
{
Debug.Assert(localScopeRowNumber <= localScopeCount);
LocalScope? nextLocalScope = null;
int nextLocalScopeIndex = localScopeRowNumber + 1;
if (nextLocalScopeIndex <= localScopeCount)
{
var scope = pdbReader.GetLocalScope(MetadataTokens.LocalScopeHandle(nextLocalScopeIndex));
if (scope.Method == methodDefHandle)
{
nextLocalScope = scope;
}
}
StateMachineHoistedLocalScope? nextHoistedScope = null;
int nextHoistedScopeIndex = vbHoistedScopeIndex + 1;
if (!vbHoistedScopes.IsDefault && nextHoistedScopeIndex < vbHoistedScopes.Length)
{
nextHoistedScope = vbHoistedScopes[nextHoistedScopeIndex].Scope;
}
int c = nextLocalScope == null ? +1 :
nextHoistedScope == null ? -1 :
CompareScopeRanges(nextLocalScope.Value.StartOffset, nextLocalScope.Value.EndOffset, nextHoistedScope.Value.StartOffset, nextHoistedScope.Value.EndOffset);
int hoistedScopeStartIndex = 0;
int hoistedScopeEndIndex = 0;
if (c <= 0 && nextLocalScope != null)
{
localScopeRowNumber = nextLocalScopeIndex;
}
else
{
nextLocalScope = null;
}
if (c >= 0 && nextHoistedScope != null)
{
static bool ScopeEquals(StateMachineHoistedLocalScope left, StateMachineHoistedLocalScope right)
=> left.StartOffset == right.StartOffset && left.EndOffset == right.EndOffset;
// determine all hoisted variables that have equal scopes:
int i = nextHoistedScopeIndex + 1;
while (i < vbHoistedScopes.Length && ScopeEquals(nextHoistedScope.Value, vbHoistedScopes[i].Scope))
{
i++;
}
hoistedScopeStartIndex = nextHoistedScopeIndex;
hoistedScopeEndIndex = i;
vbHoistedScopeIndex = i - 1;
}
else
{
hoistedScopeStartIndex = hoistedScopeEndIndex = 0;
}
return new LocalScopeInfo(nextLocalScope, hoistedScopeStartIndex, hoistedScopeEndIndex);
}
void CloseOpenScopes(int currentScopeStartOffset)
{
// close all open scopes that end before this scope starts:
while (openScopeEndOffsets.Count > 0 && currentScopeStartOffset >= openScopeEndOffsets.Peek())
{
int scopeEnd = openScopeEndOffsets.Pop();
Debug.WriteLine($"Close Scope [.., {scopeEnd})");
// Note that the root scope end is not end-inclusive in VB:
pdbWriter.CloseScope(AdjustEndScopeOffset(scopeEnd, isEndInclusive: vbSemantics && openScopeEndOffsets.Count > 0));
}
}
bool hasAnyScopes = false;
void OpenScope(int startOffset, int endOffset)
{
CloseOpenScopes(startOffset);
Debug.WriteLine($"Open Scope [{startOffset}, {endOffset})");
pdbWriter.OpenScope(startOffset);
openScopeEndOffsets.Push(endOffset);
hasAnyScopes = true;
}
bool isFirstMethodLocalScope = true;
while (true)
{
var currentLocalScope = GetNextLocalScope();
if (currentLocalScope.IsDefault)
{
break;
}
// kickoff methods don't have any scopes emitted to Windows PDBs
if (methodBodyOpt == null)
{
ReportDiagnostic(PdbDiagnosticId.MethodAssociatedWithLocalScopeHasNoBody, MetadataTokens.GetToken(MetadataTokens.LocalScopeHandle(localScopeRowNumber)));
}
else if (!isKickOffMethod)
{
LazyOpenMethod();
if (currentLocalScope.IsLocalScope)
{
var localScope = currentLocalScope.LocalScope!.Value;
OpenScope(localScope.StartOffset, localScope.EndOffset);
if (isFirstMethodLocalScope)
{
if (lastImportScopeHandle == localScope.ImportScope && vbLastImportScopeNamespace == vbCurrentMethodNamespace)
{
// forward to a method that has the same imports:
forwardImportScopesToMethodDef = lastImportScopeMethodDefHandle;
}
else
{
Debug.Assert(importStringsBuilder.Count == 0);
Debug.Assert(declaredExternAliases.Count == 0);
Debug.Assert(importGroups.Count == 0);
AddImportStrings(importStringsBuilder, importGroups, declaredExternAliases, pdbReader, metadataModel, localScope.ImportScope, aliasedAssemblyRefs, vbDefaultNamespaceImportString, vbCurrentMethodNamespace, vbSemantics);
var importStrings = importStringsBuilder.ToImmutableArray();
importStringsBuilder.Clear();
if (importStringsMap.TryGetValue(importStrings, out forwardImportScopesToMethodDef))
{
// forward to a method that has the same imports:
lastImportScopeMethodDefHandle = forwardImportScopesToMethodDef;
}
else
{
// attach import strings to the current method:
WriteImports(pdbWriter, importStrings);
lastImportScopeMethodDefHandle = methodDefHandle;
importStringsMap[importStrings] = methodDefHandle;
}
lastImportScopeHandle = localScope.ImportScope;
vbLastImportScopeNamespace = vbCurrentMethodNamespace;
}
if (vbSemantics && !forwardImportScopesToMethodDef.IsNil)
{
pdbWriter.UsingNamespace("@" + MetadataTokens.GetToken(forwardImportScopesToMethodDef));
}
// This is the method that's gonna have AssemblyRef aliases attached:
if (methodDefHandleWithAssemblyRefAliases.IsNil)
{
foreach (var (assemblyRefHandle, alias) in aliasedAssemblyRefs)
{
var assemblyRef = metadataReader.GetAssemblyReference(assemblyRefHandle);
pdbWriter.UsingNamespace("Z" + alias + " " + AssemblyDisplayNameBuilder.GetAssemblyDisplayName(metadataReader, assemblyRef));
}
}
}
foreach (var localVariableHandle in localScope.GetLocalVariables())
{
var variable = pdbReader.GetLocalVariable(localVariableHandle);
string name = pdbReader.GetString(variable.Name);
if (name.Length > MaxEntityNameLength)
{
ReportDiagnostic(PdbDiagnosticId.LocalConstantNameTooLong, MetadataTokens.GetToken(localVariableHandle));
continue;
}
if (methodBodyOpt.LocalSignature.IsNil)
{
ReportDiagnostic(PdbDiagnosticId.MethodContainingLocalVariablesHasNoLocalSignature, methodToken);
continue;
}
pdbWriter.DefineLocalVariable(variable.Index, name, (int)variable.Attributes, MetadataTokens.GetToken(methodBodyOpt.LocalSignature));
var dynamicFlags = MetadataUtilities.ReadDynamicCustomDebugInformation(pdbReader, localVariableHandle);
if (TryGetDynamicLocal(name, variable.Index, dynamicFlags, out var dynamicLocal))
{
dynamicLocals.Add(dynamicLocal);
}
var tupleElementNames = MetadataUtilities.ReadTupleCustomDebugInformation(pdbReader, localVariableHandle);
if (!tupleElementNames.IsDefaultOrEmpty)
{
tupleLocals.Add((name, SlotIndex: variable.Index, ScopeStart: 0, ScopeEnd: 0, Names: tupleElementNames));
}
}
foreach (var localConstantHandle in localScope.GetLocalConstants())
{
var constant = pdbReader.GetLocalConstant(localConstantHandle);
string name = pdbReader.GetString(constant.Name);
if (name.Length > MaxEntityNameLength)
{
ReportDiagnostic(PdbDiagnosticId.LocalConstantNameTooLong, MetadataTokens.GetToken(localConstantHandle));
continue;
}
var (value, signature) = PortableConstantSignature.GetConstantValueAndSignature(pdbReader, localConstantHandle, metadataReader.GetQualifiedTypeName);
if (!metadataModel.TryGetStandaloneSignatureHandle(signature, out var constantSignatureHandle))
{
// Signature will be unspecified. At least we store the name and the value.
constantSignatureHandle = default;
}
pdbWriter.DefineLocalConstant(name, value, MetadataTokens.GetToken(constantSignatureHandle));
var dynamicFlags = MetadataUtilities.ReadDynamicCustomDebugInformation(pdbReader, localConstantHandle);
if (TryGetDynamicLocal(name, 0, dynamicFlags, out var dynamicLocal))
{
dynamicLocals.Add(dynamicLocal);
}
var tupleElementNames = MetadataUtilities.ReadTupleCustomDebugInformation(pdbReader, localConstantHandle);
if (!tupleElementNames.IsDefaultOrEmpty)
{
// Note that the end offset of tuple locals is always end-exclusive, regardless of whether the PDB uses VB semantics or not.
tupleLocals.Add((name, SlotIndex: -1, ScopeStart: localScope.StartOffset, ScopeEnd: localScope.EndOffset, Names: tupleElementNames));
}
}
}
if (currentLocalScope.IsHoistedScope)
{
Debug.Assert(vbSemantics);
Debug.Assert(!vbResumableLocalNames.IsDefault);
bool scopeOpened = currentLocalScope.IsLocalScope;
// add $VB$ResumableLocal pseudo-variables:
for (int i = currentLocalScope.HoistedVariableStartIndex; i < currentLocalScope.HoistedVariableEndIndex; i++)
{
var (scope, index) = vbHoistedScopes[i];
if (index >= vbResumableLocalNames.Length)
{
// TODO: report error
continue;
}
if (!scopeOpened)
{
OpenScope(scope.StartOffset, scope.EndOffset);
scopeOpened = true;
}
pdbWriter.DefineLocalVariable(
index,
vbResumableLocalNames[index],
attributes: 0,
localSignatureToken: MetadataTokens.GetToken(methodBodyOpt.LocalSignature));
}
}
}
isFirstMethodLocalScope = false;
}
CloseOpenScopes(int.MaxValue);
if (openScopeEndOffsets.Count > 0)
{
ReportDiagnostic(PdbDiagnosticId.LocalScopeRangesNestingIsInvalid, methodToken);
openScopeEndOffsets.Clear();
}
if (!methodDebugInfo.SequencePointsBlob.IsNil)
{
LazyOpenMethod();
WriteSequencePoints(symSequencePointsWriter, methodDebugInfo.GetSequencePoints(), pdbReader.Documents.Count, methodToken);
}
// async method data:
var asyncData = MetadataUtilities.ReadAsyncMethodData(pdbReader, methodDebugInfoHandle);
if (!asyncData.IsNone)
{
LazyOpenMethod();
pdbWriter.SetAsyncInfo(
moveNextMethodToken: methodToken,
kickoffMethodToken: MetadataTokens.GetToken(asyncData.KickoffMethod),
catchHandlerOffset: asyncData.CatchHandlerOffset,
yieldOffsets: asyncData.YieldOffsets.ToArray(),
resumeOffsets: asyncData.ResumeOffsets.ToArray());
}
// custom debug information:
var cdiEncoder = new CustomDebugInfoEncoder(cdiBuilder);
if (isKickOffMethod)
{
cdiEncoder.AddStateMachineTypeName(GetIteratorTypeName(metadataReader, moveNextHandle));
}
else
{
if (!vbSemantics && hasAnyScopes)
{
if (forwardImportScopesToMethodDef.IsNil)
{
// record the number of import strings in each scope:
cdiEncoder.AddUsingGroups(importGroups);
if (!methodDefHandleWithAssemblyRefAliases.IsNil)
{
// forward assembly ref aliases to the first method:
cdiEncoder.AddForwardModuleInfo(methodDefHandleWithAssemblyRefAliases);
}
}
else
{
// forward all imports to another method:
cdiEncoder.AddForwardMethodInfo(forwardImportScopesToMethodDef);
}
}
if (!vbSemantics && !hoistedLocalScopes.IsDefault)
{
cdiEncoder.AddStateMachineHoistedLocalScopes(hoistedLocalScopes);
}
if (dynamicLocals.Count > 0)
{
cdiEncoder.AddDynamicLocals(dynamicLocals);
dynamicLocals.Clear();
}
if (tupleLocals.Count > 0)
{
cdiEncoder.AddTupleElementNames(tupleLocals);
tupleLocals.Clear();
}
}
importGroups.Clear();
// the following blobs map 1:1
CopyCustomDebugInfoRecord(ref cdiEncoder, pdbReader, methodDefHandle, PortableCustomDebugInfoKinds.EncLocalSlotMap, CustomDebugInfoKind.EditAndContinueLocalSlotMap);
CopyCustomDebugInfoRecord(ref cdiEncoder, pdbReader, methodDefHandle, PortableCustomDebugInfoKinds.EncLambdaAndClosureMap, CustomDebugInfoKind.EditAndContinueLambdaMap);
CopyCustomDebugInfoRecord(ref cdiEncoder, pdbReader, methodDefHandle, SymReaderHelpers.EncStateMachineSuspensionPoints, SymReaderHelpers.CustomDebugInfoKind_EncStateMachineSuspensionPoints);
if (cdiEncoder.RecordCount > 0)
{
LazyOpenMethod();
pdbWriter.DefineCustomMetadata(cdiEncoder.ToArray());
}
cdiBuilder.Clear();
if (methodOpened && aliasedAssemblyRefs.Length > 0 && !isKickOffMethod && methodDefHandleWithAssemblyRefAliases.IsNil)
{
methodDefHandleWithAssemblyRefAliases = methodDefHandle;
}
if (methodOpened)
{
Debug.WriteLine($"Close Method {methodToken:X8}");
pdbWriter.CloseMethod();
}
}
if (!pdbReader.DebugMetadataHeader.EntryPoint.IsNil)
{
pdbWriter.SetEntryPoint(MetadataTokens.GetToken(pdbReader.DebugMetadataHeader.EntryPoint));
}
var sourceLinkHandle = pdbReader.GetCustomDebugInformation(EntityHandle.ModuleDefinition, PortableCustomDebugInfoKinds.SourceLink);
if (!sourceLinkHandle.IsNil)
{
// always include Source Link
pdbWriter.SetSourceLinkData(pdbReader.GetBlobBytes(sourceLinkHandle));
if (!options.SuppressSourceLinkConversion)
{
var srcsvrData = ConvertSourceServerData(pdbReader.GetStringUTF8(sourceLinkHandle), nonEmbeddedDocumentNames, options);
// an error has been reported:
if (srcsvrData != null)
{
pdbWriter.SetSourceServerData(Encoding.UTF8.GetBytes(srcsvrData));
}
}
}
var compilerOptions = ReadCompilationOptions(pdbReader).ToImmutableDictionary();
if (compilerOptions.TryGetValue("compiler-version", out var compilerVersionString) &&
compilerOptions.TryGetValue("language", out var language) &&
language is "C#" or "Visual Basic" or "F#" &&
TryConvertCompilerVersionToFileVersion(compilerVersionString, out var fileMajor, out var fileMinor, out var fileBuild, out var fileRevision))
{
pdbWriter.AddCompilerInfo(fileMajor, fileMinor, fileBuild, fileRevision, $"{language} - {compilerVersionString}");
}
SymReaderHelpers.GetWindowsPdbSignature(pdbReader.DebugMetadataHeader.Id, out var guid, out var stamp, out var age);
pdbWriter.UpdateSignature(guid, stamp, age);
}
private static IEnumerable<KeyValuePair<string, string>> ReadCompilationOptions(MetadataReader reader)
{
var compilerOptions = reader.GetCustomDebugInformation(EntityHandle.ModuleDefinition, PortableCustomDebugInfoKinds.CompilationOptions);
if (compilerOptions.IsNil)
{
yield break;
}
var blobReader = reader.GetBlobReader(compilerOptions);
// Compiler flag bytes are UTF-8 null-terminated key-value pairs
var nullIndex = blobReader.IndexOf(0);
while (nullIndex >= 0)
{
var key = blobReader.ReadUTF8(nullIndex);
// Skip the null terminator
blobReader.ReadByte();
nullIndex = blobReader.IndexOf(0);
var value = blobReader.ReadUTF8(nullIndex);
yield return new KeyValuePair<string, string>(key, value);
// Skip the null terminator
blobReader.ReadByte();
nullIndex = blobReader.IndexOf(0);
}
}
/// <summary>
/// Roslyn compilers use version in AssemblyFileVersionAttribute for the numeric version and
/// the semantic version stored in AssemblyInformationalVersionAttribute for the version string.
/// The latter is also stored in compiler-version, but the former is not stored in compiler options.
/// We calculate it based on the version scheme used by Roslyn build infrastructure.
/// See https://github.com/dotnet/arcade/blob/release/6.0/Documentation/CorePackages/Versioning.md
/// </summary>
internal static bool TryConvertCompilerVersionToFileVersion(string str, out ushort fileMajor, out ushort fileMinor, out ushort fileBuild, out ushort fileRevision)
{
// assumes format: major.minor.revision-labels.SHORT_DATE.REVISION+CommitSha
var match = Regex.Match(str, "([0-9]+)[.]([0-9]+)[.]([0-9]+)-[^.]+[.]([0-9]+)[.]([0-9]+).*");
if (match.Success &&
ushort.TryParse(match.Groups[1].Value, out var major) &&
ushort.TryParse(match.Groups[2].Value, out var minor) &&
ushort.TryParse(match.Groups[3].Value, out var build) &&
ushort.TryParse(match.Groups[4].Value, out var shortDate) &&
ushort.TryParse(match.Groups[5].Value, out var revision))
{
var dd = shortDate % 50;
var mm = (shortDate / 50) % 20;
var yy = shortDate / 1000;
fileMajor = major;
try
{
checked
{
fileMinor = (ushort)(minor * 100 + build / 100);
fileBuild = (ushort)((build % 100) * 100 + yy);
fileRevision = (ushort)((50 * mm + dd) * 100 + revision);
return true;
}
}
catch (OverflowException)
{
}
}
fileMajor = fileMinor = fileBuild = fileRevision = 0;
return false;
}
// internal for testing
internal void ValidateAndCorrectSourceChecksum(ref Guid algorithmId, byte[] checksum, string documentName)
{
const int SizeOfSHA1 = 20;
const int SizeOfSHA256 = 32;
int expectedSize;
string algorithmName;
if (algorithmId == default)
{
expectedSize = 0;
algorithmName = ConverterResources.None;
}
else if (algorithmId == PdbGuids.HashAlgorithm.SHA1)
{
expectedSize = SizeOfSHA1;
algorithmName = nameof(PdbGuids.HashAlgorithm.SHA1);
}
else if (algorithmId == PdbGuids.HashAlgorithm.SHA256)
{
expectedSize = SizeOfSHA256;
algorithmName = nameof(PdbGuids.HashAlgorithm.SHA256);
}
else
{
// ignore unknown algorithms
return;
}
if (checksum.Length != expectedSize)
{
ReportDiagnostic(PdbDiagnosticId.SourceChecksumAlgorithmSizeMismatch, 0, new[] { algorithmName, documentName });
if (algorithmId == default)
{
// guess correct algorithm id based on the checksum size:
switch (checksum.Length)
{
case SizeOfSHA1:
algorithmId = PdbGuids.HashAlgorithm.SHA1;
break;
case SizeOfSHA256:
algorithmId = PdbGuids.HashAlgorithm.SHA256;
break;
}
}
}
}
private static string? GetMethodNamespace(MetadataReader metadataReader, MethodDefinition methodDef)
{
var typeDefHandle = methodDef.GetDeclaringType();
if (typeDefHandle.IsNil)
{
return null;
}
while (true)
{
var typeDef = metadataReader.GetTypeDefinition(typeDefHandle);
typeDefHandle = typeDef.GetDeclaringType();
if (typeDefHandle.IsNil)
{
return metadataReader.GetString(typeDef.Namespace);
}
}
}
private static int AdjustEndScopeOffset(int exclusiveOffset, bool isEndInclusive) =>
isEndInclusive ? exclusiveOffset - 1 : exclusiveOffset;
private static bool TryGetDynamicLocal(
string name,
int slotIndex,
ImmutableArray<bool> flagsOpt,
out (string LocalName, byte[] Flags, int Count, int SlotIndex) result)
{
// C# compiler skips variables with too many flags or too long name:
if (flagsOpt.IsDefaultOrEmpty ||
flagsOpt.Length > CustomDebugInfoEncoder.DynamicAttributeSize ||
name.Length >= CustomDebugInfoEncoder.IdentifierSize)
{
result = default((string, byte[], int, int));
return false;
}
var bytes = new byte[Math.Min(flagsOpt.Length, CustomDebugInfoEncoder.DynamicAttributeSize)];
for (int k = 0; k < bytes.Length; k++)
{
if (flagsOpt[k])
{
bytes[k] = 1;
}
}
result = (name, bytes, flagsOpt.Length, slotIndex);
return true;
}
private static void CopyCustomDebugInfoRecord(
ref CustomDebugInfoEncoder cdiEncoder,
MetadataReader pdbReader,
MethodDefinitionHandle methodDefHandle,
Guid portableKind,
CustomDebugInfoKind windowsKind)
{
var cdiHandle = pdbReader.GetCustomDebugInformation(methodDefHandle, portableKind);
if (!cdiHandle.IsNil)
{
var bytes = pdbReader.GetBlobBytes(cdiHandle);
cdiEncoder.AddRecord(
windowsKind,
bytes,
(b, builder) => builder.WriteBytes(b));
}
}
private static ImmutableArray<StateMachineHoistedLocalScope> GetStateMachineHoistedLocalScopes(MetadataReader pdbReader, MethodDefinitionHandle methodDefHandle)
{
var cdiHandle = pdbReader.GetCustomDebugInformation(methodDefHandle, PortableCustomDebugInfoKinds.StateMachineHoistedLocalScopes);
if (cdiHandle.IsNil)
{
return default;
}
return MetadataUtilities.DecodeHoistedLocalScopes(pdbReader.GetBlobReader(cdiHandle));
}
private static string GetIteratorTypeName(MetadataReader metadataReader, MethodDefinitionHandle moveNextHandle)
{
// TODO: errors
var moveNextDef = metadataReader.GetMethodDefinition(moveNextHandle);
var iteratorType = moveNextDef.GetDeclaringType();
var name = metadataReader.GetString(metadataReader.GetTypeDefinition(iteratorType).Name);
// trim generic arity from the name:
int backtick = name.LastIndexOf('`');
return (backtick > 0) ? name.Substring(0, backtick) : name;
}
private static void WriteImports(SymUnmanagedWriter pdbWriter, ImmutableArray<string> importStrings)
{
foreach (var importString in importStrings)
{
pdbWriter.UsingNamespace(importString);
}
}
private void AddImportStrings(
List<string> importStrings,
List<int> importGroups,
HashSet<string> declaredExternAliases,
MetadataReader pdbReader,
MetadataModel metadataModel,
ImportScopeHandle importScopeHandle,
ImmutableArray<(AssemblyReferenceHandle, string)> aliasedAssemblyRefs,
string? vbDefaultNamespaceImportString,
string? vbCurrentMethodNamespace,
bool vbSemantics)
{
Debug.Assert(declaredExternAliases.Count == 0);
AddExternAliases(declaredExternAliases, pdbReader, importScopeHandle);
while (!importScopeHandle.IsNil)
{
var importScope = pdbReader.GetImportScope(importScopeHandle);
bool isProjectLevel = importScope.Parent.IsNil;
if (isProjectLevel && vbDefaultNamespaceImportString != null)
{
Debug.Assert(vbSemantics);
importStrings.Add(vbDefaultNamespaceImportString);
}
int importStringCount = 0;
foreach (var import in importScope.GetImports())
{
var importString = TryEncodeImport(pdbReader, metadataModel, importScopeHandle, import, declaredExternAliases, aliasedAssemblyRefs, isProjectLevel, vbSemantics);
if (importString == null)
{
// diagnostic already reported if applicable
continue;
}
if (importString.Length > MaxEntityNameLength)
{
ReportDiagnostic(PdbDiagnosticId.LocalScopeRangesNestingIsInvalid, MetadataTokens.GetToken(importScopeHandle), importString);
continue;
}
importStrings.Add(importString);
importStringCount++;
}
if (isProjectLevel && vbCurrentMethodNamespace != null)
{
Debug.Assert(vbSemantics);
importStrings.Add(vbCurrentMethodNamespace);
}
// Skip C# project-level scope if it doesn't include namespaces.
// Currently regular (non-scripting) C# doesn't support project-level namespace imports.
if (vbSemantics || !isProjectLevel || importStringCount > 0)
{
importGroups.Add(importStringCount);
}
importScopeHandle = importScope.Parent;
}
declaredExternAliases.Clear();
}
private static void AddExternAliases(HashSet<string> externAliases, MetadataReader pdbReader, ImportScopeHandle importScopeHandle)
{
while (!importScopeHandle.IsNil)
{
var importScope = pdbReader.GetImportScope(importScopeHandle);
foreach (var import in importScope.GetImports())
{
if (import.Kind == ImportDefinitionKind.ImportAssemblyReferenceAlias)
{
externAliases.Add(pdbReader.GetStringUTF8(import.Alias));
}
}
importScopeHandle = importScope.Parent;
}
}
private static ImmutableArray<(AssemblyReferenceHandle, string)> GetAliasedAssemblyRefs( MetadataReader pdbReader)
{
// F# doesn't emit import scopes
if (pdbReader.ImportScopes.Count == 0)
{
return ImmutableArray<(AssemblyReferenceHandle, string)>.Empty;
}
// C# serialized aliased assembly refs to the first import scope.
// In Windows PDBs they are attached as CDIs to any method in the assembly and the other methods
// have CDI that forwards to it.
return (from import in pdbReader.GetImportScope(MetadataTokens.ImportScopeHandle(1)).GetImports()
where import.Kind == ImportDefinitionKind.AliasAssemblyReference
select (import.TargetAssembly, pdbReader.GetStringUTF8(import.Alias))).ToImmutableArray();
}
private string? TryEncodeImport(
MetadataReader pdbReader,
MetadataModel metadataModel,
ImportScopeHandle importScopeHandle,
ImportDefinition import,
HashSet<string> declaredExternAliases,
ImmutableArray<(AssemblyReferenceHandle, string)> aliasedAssemblyRefs,
bool isProjectLevel,
bool vbSemantics)
{
string? typeName;
string namespaceName;
// See Roslyn implementation: PdbWriter.TryEncodeImport, MetadataWriter.SerializeImport
switch (import.Kind)
{
case ImportDefinitionKind.AliasType:
case ImportDefinitionKind.ImportType:
// C#, VB
if (vbSemantics)
{
// VB doesn't support generics in imports:
if (import.TargetType.Kind == HandleKind.TypeSpecification)
{
return null;
}
typeName = metadataModel.GetSerializedTypeName(import.TargetType);
if (typeName == null)
{
ReportDiagnostic(PdbDiagnosticId.UnsupportedImportType, MetadataTokens.GetToken(importScopeHandle), MetadataTokens.GetToken(import.TargetType));
return null;
}
if (import.Kind == ImportDefinitionKind.AliasType)
{
return (isProjectLevel ? "@PA:" : "@FA:") + pdbReader.GetStringUTF8(import.Alias) + "=" + typeName;
}
else
{
return (isProjectLevel ? "@PT:" : "@FT:") + typeName;
}
}
else
{
typeName = metadataModel.GetSerializedTypeName(import.TargetType);
if (typeName == null)
{
ReportDiagnostic(PdbDiagnosticId.UnsupportedImportType, MetadataTokens.GetToken(importScopeHandle), MetadataTokens.GetToken(import.TargetType));
return null;
}
if (import.Kind == ImportDefinitionKind.AliasType)
{
return "A" + pdbReader.GetStringUTF8(import.Alias) + " T" + typeName;
}
else
{
return "T" + typeName;
}
}
case ImportDefinitionKind.AliasNamespace:
// C#, VB
namespaceName = pdbReader.GetStringUTF8(import.TargetNamespace);
if (vbSemantics)
{