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Performance: Pre-calculate all method start and end pointers

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This commit is contained in:
Katy Coe
2019-11-14 16:39:42 +01:00
parent 69d4ffa9d5
commit f1629824d7
1 changed files with 13 additions and 7 deletions
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20
Il2CppInspector/Il2CppInspector.cs
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@@ -19,8 +19,8 @@ namespace Il2CppInspector
private Il2CppBinary Binary { get; }
private Metadata Metadata { get; }
// All method pointers sorted in ascending order (for finding the end of a method)
private List<ulong> sortedMethodPointers { get; }
// All method pointers (start => end)
private Dictionary<ulong, ulong> methodPointers { get; }
// Attribute indexes (>=24.1) arranged by customAttributeStart and token
public Dictionary<int, Dictionary<uint, int>> AttributeIndicesByToken { get; }
@@ -157,10 +157,16 @@ namespace Il2CppInspector
}
// Get sorted list of method pointers
if (Version <= 24.1)
sortedMethodPointers = Binary.GlobalMethodPointers.OrderBy(m => m).ToList();
if (Version >= 24.2)
sortedMethodPointers = Binary.ModuleMethodPointers.SelectMany(module => module.Value).OrderBy(m => m).ToList();
var sortedMethodPointers = (Version <= 24.1)?
Binary.GlobalMethodPointers.OrderBy(m => m).ToList() :
Binary.ModuleMethodPointers.SelectMany(module => module.Value).OrderBy(m => m).ToList();
// Guestimate method end addresses
methodPointers = new Dictionary<ulong, ulong>(sortedMethodPointers.Count);
for (var i = 0; i < sortedMethodPointers.Count - 1; i++)
methodPointers.Add(sortedMethodPointers[i], sortedMethodPointers[i + 1]);
// The last method end pointer will be incorrect but there is no way of calculating it
methodPointers.Add(sortedMethodPointers[^1], sortedMethodPointers[^1]);
// Organize custom attribute indices
if (Version >= 24.1) {
@@ -212,7 +218,7 @@ namespace Il2CppInspector
// Consider the end of the method to be the start of the next method (or zero)
// The last method end will be wrong but there is no way to calculate it
return (start, sortedMethodPointers.FirstOrDefault(p => p > start));
return (start, methodPointers[start]);
}
public static List<Il2CppInspector> LoadFromFile(string codeFile, string metadataFile) {