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IL2CPP: Fix loading incorrect number of metadata usages

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This commit is contained in:
Katy Coe
2020-01-27 06:20:58 +01:00
parent d0583e83b7
commit f41a98fc7c
3 changed files with 35 additions and 29 deletions
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37
Il2CppInspector/IL2CPP/Il2CppInspector.cs
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@@ -25,6 +25,10 @@ namespace Il2CppInspector
// Attribute indexes (>=24.1) arranged by customAttributeStart and token
public Dictionary<int, Dictionary<uint, int>> AttributeIndicesByToken { get; }
// Merged list of all metadata usage references
public List<MetadataUsage> MetadataUsages { get; }
public ulong[] BinaryMetadataUsages { get; } // TODO: Make private
// Shortcuts
public double Version => Metadata.Version;
@@ -43,7 +47,6 @@ namespace Il2CppInspector
public int[] GenericConstraintIndices => Metadata.GenericConstraintIndices;
public Il2CppCustomAttributeTypeRange[] AttributeTypeRanges => Metadata.AttributeTypeRanges;
public Il2CppInterfaceOffsetPair[] InterfaceOffsets => Metadata.InterfaceOffsets;
public List<MetadataUsage> MetadataUsages => Metadata.MetadataUsages;
public int[] InterfaceUsageIndices => Metadata.InterfaceUsageIndices;
public int[] NestedTypeIndices => Metadata.NestedTypeIndices;
public int[] AttributeTypeIndices => Metadata.AttributeTypeIndices;
@@ -55,7 +58,6 @@ namespace Il2CppInspector
public Dictionary<string, Il2CppCodeGenModule> Modules => Binary.Modules;
public ulong[] CustomAttributeGenerators => Binary.CustomAttributeGenerators;
public Il2CppMethodSpec[] MethodSpecs => Binary.MethodSpecs;
public ulong[] BinaryMetadataUsages => Binary.MetadataUsages;
// TODO: Finish all file access in the constructor and eliminate the need for this
public IFileFormatReader BinaryImage => Binary.Image;
@@ -119,6 +121,27 @@ namespace Il2CppInspector
return ((ulong) pValue, value);
}
private List<MetadataUsage> buildMetadataUsages()
{
var usages = new Dictionary<uint, MetadataUsage>();
foreach (var metadataUsageList in Metadata.MetadataUsageLists)
{
for (var i = 0; i < metadataUsageList.count; i++)
{
var metadataUsagePair = Metadata.MetadataUsagePairs[metadataUsageList.start + i];
var encodedType = metadataUsagePair.encodedSourceIndex & 0xE0000000;
var usageType = (MetadataUsageType)(encodedType >> 29);
var sourceIndex = metadataUsagePair.encodedSourceIndex & 0x1FFFFFFF;
var destinationIndex = metadataUsagePair.destinationindex;
usages.TryAdd(destinationIndex, new MetadataUsage(usageType, (int)sourceIndex, (int)destinationIndex));
}
}
return usages.Values.ToList();
}
public Il2CppInspector(Il2CppBinary binary, Metadata metadata) {
// Store stream representations
Binary = binary;
@@ -191,6 +214,16 @@ namespace Il2CppInspector
AttributeIndicesByToken.Add(image.customAttributeStart, attsByToken);
}
}
// Merge all metadata usage references into a single distinct list
if (Version >= 19) {
MetadataUsages = buildMetadataUsages();
// Metadata usages (addresses)
// Unfortunately the value supplied in MetadataRegistration.matadataUsagesCount seems to be incorrect,
// so we have to calculate the correct number of usages above before reading the usage address list from the binary
BinaryMetadataUsages = Binary.Image.ReadMappedArray<ulong>(Binary.MetadataRegistration.metadataUsages, MetadataUsages.Count);
}
}
public (ulong Start, ulong End)? GetMethodPointer(Il2CppCodeGenModule module, Il2CppMethodDefinition methodDef) {