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Improve Leaf Record Errors #360

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Improve Leaf Record Errors #360

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83a1b3f
Improve errors for leaf record access failures
ds5678 Sep 30, 2022
1402860
Update the error message
ds5678 Oct 13, 2022
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16 changes: 16 additions & 0 deletions src/AsmResolver.Symbols.Pdb/Records/CodeViewSymbol.cs
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
using AsmResolver.IO;
using AsmResolver.Symbols.Pdb.Leaves;
using AsmResolver.Symbols.Pdb.Records.Serialized;

namespace AsmResolver.Symbols.Pdb.Records;
Expand Down Expand Up @@ -37,4 +38,19 @@ public static CodeViewSymbol FromReader(PdbReaderContext context, ref BinaryStre
_ => new UnknownSymbol(type, dataReader.ReadToEnd())
};
}

private protected T? GetLeafRecord<T>(PdbReaderContext context, uint typeIndex) where T : CodeViewLeaf
{
return context.ParentImage.TryGetLeafRecord(typeIndex, out var leaf)
? leaf switch
{
T t => t,
UnknownCodeViewLeaf unknownLeaf => context.Parameters.ErrorListener.BadImageAndReturn<T>(
$"{CodeViewSymbolType} references a leaf at {typeIndex:X8} that is of an unknown type {unknownLeaf.LeafKind}."),
_ => context.Parameters.ErrorListener.BadImageAndReturn<T>(
$"{CodeViewSymbolType} references a leaf at {typeIndex:X8} that is of an unexpected type ({leaf.LeafKind}).")
}
: context.Parameters.ErrorListener.BadImageAndReturn<T>(
$"{CodeViewSymbolType} contains an invalid type index {typeIndex:X8}.");
}
}
5 changes: 1 addition & 4 deletions src/AsmResolver.Symbols.Pdb/Records/Serialized/SerializedConstantSymbol.cs
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Expand Up @@ -31,9 +31,6 @@ public SerializedConstantSymbol(PdbReaderContext context, BinaryStreamReader rea
/// <inheritdoc />
protected override CodeViewTypeRecord? GetConstantType()
{
return _context.ParentImage.TryGetLeafRecord(_typeIndex, out var leaf) && leaf is CodeViewTypeRecord type
? type
: _context.Parameters.ErrorListener.BadImageAndReturn<CodeViewTypeRecord>(
$"Constant contains an invalid type index {_typeIndex:X8}.");
return GetLeafRecord<CodeViewTypeRecord>(_context, _typeIndex);
}
}
5 changes: 1 addition & 4 deletions src/AsmResolver.Symbols.Pdb/Records/Serialized/SerializedUserDefinedTypeSymbol.cs
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Expand Up @@ -30,9 +30,6 @@ public SerializedUserDefinedTypeSymbol(PdbReaderContext context, BinaryStreamRea
/// <inheritdoc />
protected override CodeViewTypeRecord? GetSymbolType()
{
return _context.ParentImage.TryGetLeafRecord(_typeIndex, out var leaf) && leaf is CodeViewTypeRecord type
? type
: _context.Parameters.ErrorListener.BadImageAndReturn<CodeViewTypeRecord>(
$"User-defined type contains an invalid type index {_typeIndex:X8}.");
return GetLeafRecord<CodeViewTypeRecord>(_context, _typeIndex);
}
}