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AppModel: Only populate API exports existing in both the binary and selected API header

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This commit is contained in:
Katy Coe
2020-07-24 16:32:02 +02:00
parent 336648e8bf
commit e0a6c8746e
1 changed files with 14 additions and 6 deletions
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20
Il2CppInspector.Common/Model/AppModel.cs
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@@ -62,7 +62,8 @@ namespace Il2CppInspector.Model
public List<Export> Exports { get; }
// All of the API exports defined in the IL2CPP binary
public Dictionary<ulong, CppFnPtrType> APIExports { get; private set; } = new Dictionary<ulong, CppFnPtrType>();
// Note: Multiple export names may have the same virtual address
public MultiKeyDictionary<string, ulong, CppFnPtrType> AvailableAPIs { get; } = new MultiKeyDictionary<string, ulong, CppFnPtrType>();
// Delegated C++ types iterator
public IEnumerator<CppType> GetEnumerator() => CppTypeCollection.GetEnumerator();
@@ -119,6 +120,8 @@ namespace Il2CppInspector.Model
UnityHeaders = unityVersion != null ? UnityHeaders.GetHeadersForVersion(unityVersion) : UnityHeaders.GuessHeadersForBinary(ILModel.Package.Binary)[0];
UnityVersion = unityVersion ?? UnityHeaders.VersionRange.Min;
Console.WriteLine($"Selected Unity version(s) {UnityHeaders.VersionRange} (types: {UnityHeaders.TypeHeaderResource.VersionRange}, APIs: {UnityHeaders.APIHeaderResource.VersionRange})");
// Check for matching metadata and binary versions
if (UnityHeaders.MetadataVersion != ILModel.Package.BinaryImage.Version) {
Console.WriteLine($"Warning: selected version {UnityVersion} (metadata version {UnityHeaders.MetadataVersion})" +
@@ -132,14 +135,19 @@ namespace Il2CppInspector.Model
// Calling declarationGenerator.GenerateRemainingTypeDeclarations() below will automatically add to this collection
CppTypeCollection = CppTypeCollection.FromUnityHeaders(UnityHeaders, declarationGenerator);
// Populate APIExports with actual API symbols from Binary.GetAPIExports() and their matching header signatures
// NOTE: This will only be filled with exports that actually exist in the binary and have a mappable address
APIExports = ILModel.Package.Binary.GetAPIExports()
// Populate AvailableAPIs with actual API symbols from Binary.GetAPIExports() and their matching header signatures
// NOTE: This will only be filled with exports that actually exist in both the binary and the API header,
// and have a mappable address. This prevents exceptions when cross-querying the header and binary APIs.
var exports = ILModel.Package.Binary.GetAPIExports()
.Where(e => CppTypeCollection.TypedefAliases.ContainsKey(e.Key))
.Select(e => new {
VirtualAddress = e.Value,
FnPtr = CppTypeCollection.TypedefAliases[e.Key]
})
.ToDictionary(kv => kv.VirtualAddress, kv => (CppFnPtrType) kv.FnPtr);
});
AvailableAPIs.Clear();
foreach (var export in exports)
AvailableAPIs.Add(export.FnPtr.Name, export.VirtualAddress, (CppFnPtrType) export.FnPtr);
// Initialize ordered type list for code output
DependencyOrderedCppTypes = new List<CppType>();