Add a symbol verifier

Author: ThadHouse

src/wpiutil/Natives/TimestampNative.cs

@@ -5,10 +5,6 @@ namespace WPIUtil.Natives;
 
 public static partial class TimestampNative
 {
-    [LibraryImport("wpiutil", EntryPoint = "WPI_Impl_ShutdownNowRio")]
-    [UnmanagedCallConv(CallConvs = [typeof(CallConvCdecl)])]
-    public static partial void ShutdownNowRio();
-
     [LibraryImport("wpiutil", EntryPoint = "WPI_NowDefault")]
     [UnmanagedCallConv(CallConvs = [typeof(CallConvCdecl)])]
     public static partial ulong NowDefault();

test/ntcore.test/SymbolVerifier.cs

@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.InteropServices;
+using NetworkTables;
+using Xunit;
+
+namespace WPIUtil.Test;
+
+public class SymbolVerifier
+{
+    [Fact]
+    public void VerifySymbols()
+    {
+        Assembly assemblyType = typeof(NetworkTableInstance).Assembly;
+        // Find all native methods
+        var foundMethods =
+            assemblyType.GetTypes()
+                .SelectMany(x => x.GetMethods(BindingFlags.Static | BindingFlags.NonPublic | BindingFlags.Public))
+                .Where(x => x.Attributes.HasFlag(MethodAttributes.PinvokeImpl))
+                .Select(x => (x, x.GetCustomAttribute<DllImportAttribute>()))
+                .Where(x => x.Item2 != null)
+                .Select(x => (Method: x.x, Dll: x.Item2!.Value, EntryPoint: x.Item2.EntryPoint ?? x.x.Name));
+
+        Dictionary<string, nint> libraries = [];
+        foreach (var method in foundMethods)
+        {
+            if (!libraries.ContainsKey(method.Dll))
+            {
+                libraries[method.Dll] = NativeLibrary.Load(method.Dll, assemblyType, DllImportSearchPath.UseDllDirectoryForDependencies);
+            }
+
+            var library = libraries[method.Dll];
+            Assert.True(NativeLibrary.TryGetExport(library, method.EntryPoint, out _),
+                $"Failed to find symbol {method.EntryPoint} in {method.Dll}");
+        }
+    }
+}

test/wpiutil.test/SymbolVerifier.cs

@@ -0,0 +1,35 @@
+using System.Reflection;
+using System.Runtime.InteropServices;
+using Xunit;
+
+namespace WPIUtil.Test;
+
+public class SymbolVerifier
+{
+    [Fact]
+    public void VerifySymbols()
+    {
+        Assembly assemblyType = typeof(WpiString).Assembly;
+        // Find all native methods
+        var foundMethods =
+            assemblyType.GetTypes()
+                .SelectMany(x => x.GetMethods(BindingFlags.Static | BindingFlags.NonPublic | BindingFlags.Public))
+                .Where(x => x.Attributes.HasFlag(MethodAttributes.PinvokeImpl))
+                .Select(x => (x, x.GetCustomAttribute<DllImportAttribute>()))
+                .Where(x => x.Item2 != null)
+                .Select(x => (Method: x.x, Dll: x.Item2!.Value, EntryPoint: x.Item2.EntryPoint ?? x.x.Name));
+
+        Dictionary<string, nint> libraries = [];
+        foreach (var method in foundMethods)
+        {
+            if (!libraries.ContainsKey(method.Dll))
+            {
+                libraries[method.Dll] = NativeLibrary.Load(method.Dll, assemblyType, DllImportSearchPath.UseDllDirectoryForDependencies);
+            }
+
+            var library = libraries[method.Dll];
+            Assert.True(NativeLibrary.TryGetExport(library, method.EntryPoint, out _),
+                $"Failed to find symbol {method.EntryPoint} in {method.Dll}");
+        }
+    }
+}