public override void Apply()
{
// The process to patch native methods is as follows:
// 1. Create a managed proxy method that calls NativeDetour's trampoline (we need to cache it
// because we don't know the trampoline method when generating the DMD).
// 2. Pass the proxy to the normal Harmony manipulator to apply prefixes, postfixes, transpilers, etc.
// 3. NativeDetour the method to the managed proxy
// 4. Cache the NativeDetour's trampoline (technically we wouldn't need to, this is just a workaround
// for MonoMod's API.
if (IsRunningOnDotNetCore)
{
Logger.Log(Logger.LogChannel.Warn, () => $"Patch target {Original.GetID()} is marked as extern. " +
"Extern methods may not be patched because of inlining behaviour of coreclr (refer to https://github.com/dotnet/coreclr/pull/8263)." +
"If you need to patch externs, consider using pure NativeDetour instead.");
}
var prevDmd = _dmd;
_nativeDetour?.Dispose();
_dmd = GenerateManagedOriginal();
var ctx = new ILContext(_dmd.Definition);
HarmonyManipulator.Manipulate(Original, Original.GetPatchInfo(), ctx);
var target = _dmd.Generate();
_nativeDetour = new NativeDetour(Original, target, new NativeDetourConfig
{
ManualApply = true
});
lock (TrampolineCache)
{
if (prevDmd != null)
{
TrampolineCache.Remove(prevDmd.GetHashCode());
}
TrampolineCache[_dmd.GetHashCode()] = CreateDelegate(_trampolineDelegateType, _nativeDetour.GenerateTrampoline(_invokeTrampolineMethod));
}
_nativeDetour.Apply();
}
private void Manipulator(ILContext ctx)
{
HarmonyManipulator.Manipulate(Original, Original.GetPatchInfo(), ctx);
}