public void TestDetoursRedo()
{
lock (TestObject.Lock) {
// The following use cases are not meant to be usage examples.
// Please take a look at DetourTest and HookTest instead.
// Uncomment the following line when you want to run this test isolated and make sure that pins aren't being leaked.
DetourRuntimeILPlatform runtimeIL = null; // DetourHelper.Runtime as DetourRuntimeILPlatform;
DetourRuntimeILPlatform.MethodPinInfo[] pinnedPrev = null;
if (runtimeIL != null)
{
pinnedPrev = runtimeIL.GetPins();
}
Step(new NativeDetour(
typeof(TestObject).GetMethod("TestStaticMethod"),
typeof(DetourRedoTest).GetMethod("TestStaticMethod_A")
));
Step(new Detour(
typeof(TestObject).GetMethod("TestStaticMethod"),
typeof(DetourRedoTest).GetMethod("TestStaticMethod_A")
));
Step(new Hook(
typeof(TestObject).GetMethod("TestStaticMethod"),
typeof(DetourRedoTest).GetMethod("TestStaticMethod_A")
));
if (runtimeIL != null)
{
DetourRuntimeILPlatform.MethodPinInfo[] pinned = runtimeIL.GetPins();
Assert.Equal(pinnedPrev.Length, pinned.Length);
for (int i = 0; i < pinned.Length; i++)
{
DetourRuntimeILPlatform.MethodPinInfo pinPrev = pinnedPrev[i];
DetourRuntimeILPlatform.MethodPinInfo pin = pinned[i];
Assert.Equal(pinPrev.Handle.Value, pin.Handle.Value);
Assert.Equal(pinPrev.Count, pin.Count);
}
}
void Step(IDetour d)
{
using (d) {
Assert.True(d.IsValid);
Assert.True(d.IsApplied);
int staticResult = TestObject.TestStaticMethod(2, 3);
Assert.Equal(12, staticResult);
d.Undo();
Assert.True(d.IsValid);
Assert.False(d.IsApplied);
staticResult = TestObject.TestStaticMethod(2, 3);
Assert.Equal(6, staticResult);
d.Apply();
Assert.True(d.IsValid);
Assert.True(d.IsApplied);
staticResult = TestObject.TestStaticMethod(2, 3);
Assert.Equal(12, staticResult);
}
Assert.False(d.IsValid);
Assert.False(d.IsApplied);
}
}
}
public static int TestMethod_B(Func <TestObject, int, int, int> orig, TestObject self, int a, int b)
{
return(orig(self, a, b) + 42);
}
public void TestDetoursExt()
{
lock (TestObject.Lock) {
// The following use cases are not meant to be usage examples.
// Please take a look at DetourTest and HookTest instead.
#if true
using (NativeDetour d = new NativeDetour(
// .GetNativeStart() to enforce a native detour.
typeof(TestObject).GetMethod("TestStaticMethod").Pin().GetNativeStart(),
typeof(DetourExtTest).GetMethod("TestStaticMethod_A")
)) {
int staticResult = d.GenerateTrampoline <Func <int, int, int> >()(2, 3);
Console.WriteLine($"TestStaticMethod(2, 3): {staticResult}");
Assert.Equal(6, staticResult);
staticResult = TestObject.TestStaticMethod(2, 3);
Console.WriteLine($"TestStaticMethod(2, 3): {staticResult}");
Assert.Equal(12, staticResult);
}
// We can't create a backup for this.
MethodBase dm;
using (DynamicMethodDefinition dmd = new DynamicMethodDefinition(typeof(TestObject).GetMethod("TestStaticMethod"))) {
dm = dmd.Generate();
}
using (NativeDetour d = new NativeDetour(
dm,
typeof(DetourExtTest).GetMethod("TestStaticMethod_A")
)) {
int staticResult = d.GenerateTrampoline <Func <int, int, int> >()(2, 3);
Console.WriteLine($"TestStaticMethod(2, 3): {staticResult}");
Assert.Equal(6, staticResult);
// FIXME: dm.Invoke can fail with a release build in mono 5.X!
// staticResult = (int) dm.Invoke(null, new object[] { 2, 3 });
staticResult = ((Func <int, int, int>)dm.CreateDelegate <Func <int, int, int> >())(2, 3);
Console.WriteLine($"TestStaticMethod(2, 3): {staticResult}");
Assert.Equal(12, staticResult);
}
#endif
// This was provided by Chicken Bones (tModLoader).
// GetEncoding behaves differently on .NET Core and even between .NET Framework versions,
// which is why this test only applies to Mono, preferably on Linux to verify if flagging
// regions of code as read-writable and then read-executable works for AOT'd code.
#if false
using (Hook h = new Hook(
typeof(Encoding).GetMethod("GetEncoding", new Type[] { typeof(string) }),
new Func <Func <string, Encoding>, string, Encoding>((orig, name) => {
if (name == "IBM437")
{
return(null);
}
return(orig(name));
})
)) {
Assert.Null(Encoding.GetEncoding("IBM437"));
}
#endif
// This was provided by a Harmony user.
// TextWriter's methods (including all overrides) were unable to be hooked on some runtimes.
// FIXME: .NET 5 introduces similar behavior for macOS and Linux, but RD isn't ready for that. See DetourRuntimeNETPlatform for more info.
#if true
using (MemoryStream ms = new MemoryStream()) {
using (StreamWriter writer = new StreamWriter(ms, Encoding.UTF8, 1024, true)) {
// In case anyone needs to debug this mess anytime in the future ever again:
/*/
* MethodBase m = typeof(StreamWriter).GetMethod("Write", new Type[] { typeof(string) });
* Console.WriteLine($"meth: 0x{(long) m?.MethodHandle.Value:X16}");
* Console.WriteLine($"getf: 0x{(long) m?.MethodHandle.GetFunctionPointer():X16}");
* Console.WriteLine($"fptr: 0x{(long) m?.GetLdftnPointer():X16}");
* Console.WriteLine($"nats: 0x{(long) m?.GetNativeStart():X16}");
* /**/
// Debugger.Break();
writer.Write("A");
using (Hook h = new Hook(
typeof(StreamWriter).GetMethod("Write", new Type[] { typeof(string) }),
new Action <Action <StreamWriter, string>, StreamWriter, string>((orig, self, value) => {
orig(self, "-");
})
)) {
// Debugger.Break();
writer.Write("B");
}
writer.Write("C");
}
ms.Seek(0, SeekOrigin.Begin);
using (StreamReader reader = new StreamReader(ms, Encoding.UTF8, false, 1024, true)) {
Assert.Equal("A-C", reader.ReadToEnd());
}
}
#endif
#if NETFRAMEWORK && true
Assert.Equal("A", new SqlCommand("A").CommandText);
using (Hook h = new Hook(
typeof(SqlCommand).GetConstructor(new Type[] { typeof(string) }),
new Action <Action <SqlCommand, string>, SqlCommand, string>((orig, self, value) => {
orig(self, "-");
})
)) {
Assert.Equal("-", new SqlCommand("B").CommandText);
}
Assert.Equal("C", new SqlCommand("C").CommandText);
#endif
// This was provided by tModLoader.
// The .NET Framework codepath failed on making the method writable the for a single user.
#if NETFRAMEWORK && true
try {
throw new Exception();
} catch (Exception e) {
Assert.NotEqual("", e.StackTrace.Trim());
}
using (Hook h = Type.GetType("Mono.Runtime") != null ?
// Mono
new Hook(
typeof(Exception).GetMethod("GetStackTrace", BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance),
new Func <Func <Exception, bool, string>, Exception, bool, string>((orig, self, fNeedFileInfo) => {
return("");
})
) :
// .NET
new Hook(
typeof(StackTrace).GetConstructor(new[] { typeof(Exception), typeof(bool) }),
new Action <Action <StackTrace, Exception, bool>, StackTrace, Exception, bool>((orig, self, e, fNeedFileInfo) => {
orig(self, e, fNeedFileInfo);
DynamicData.Set(self, new {
frames = new StackFrame[0],
m_iNumOfFrames = 0,
m_iMethodsToSkip = 0
});
})
)) {
try {
throw new Exception();
} catch (Exception e) {
Assert.Equal("", e.StackTrace.Trim());
}
}
try {
throw new Exception();
} catch (Exception e) {
Assert.NotEqual("", e.StackTrace.Trim());
}
#endif
}
}
public static int TestMethod_A(TestObject self, int a, int b)
{
return(42);
}