[Mono-bugs] [Bug 399047] New: Broken TypeBuilder.GetField

bugzilla_noreply at novell.com bugzilla_noreply at novell.com
Tue Jun 10 15:39:30 EDT 2008


           Summary: Broken TypeBuilder.GetField
           Product: Mono: Runtime
           Version: SVN
          Platform: Other
        OS/Version: Other
            Status: NEW
          Severity: Blocker
          Priority: P5 - None
         Component: generics
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: msafar at novell.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---

1. Compile sample program
2. Run it on mono
3. Disassembly produced file "Instance.exe"

Mono produces invalid generic field reference at IL_0001 in method  Test<TA>

IL_0001:  ldfld !!0 class G<!!0>::F

should be

    // method line 4
    .method public 
           instance default void Test<TA> ()  cil managed 
        // Method begins at RVA 0x2100
        // Code size 8 (0x8)
        .maxstack 8
        IL_0000:  ldnull 
        IL_0001:  ldfld !!0 class G<!!0>::F     <-----------
        IL_0006:  pop 
        IL_0007:  ret 
    } // end of method P::Test

This blocks my recent changes in gmcs.

using System;
using System.Reflection;
using System.Reflection.Emit;

public class Entry
        public static int Main ()
                Instance (1);

                return 0;

        public static void Instance<R> (R r)
                AssemblyName name = new AssemblyName ("Instance");
                AssemblyBuilder asmbuild = System.Threading.Thread.GetDomain
().DefineDynamicAssembly (name, AssemblyBuilderAccess.RunAndSave);
                ModuleBuilder mod = asmbuild.DefineDynamicModule

                TypeBuilder G = mod.DefineType ("G", TypeAttributes.Public);
                Type T = G.DefineGenericParameters ("T") [0];
                Type GObj = G.MakeGenericType (new Type [] { T });

                FieldBuilder F = G.DefineField ("F", T,

                MethodBuilder Foo = G.DefineMethod ("Foo",
                        ILGenerator il = Foo.GetILGenerator ();

                        il.Emit (OpCodes.Ret);

                TypeBuilder P = mod.DefineType ("P", TypeAttributes.Public);
                MethodBuilder Test = P.DefineMethod ("Test",
                Type TATest = Test.DefineGenericParameters ("TA") [0];
                        Type TestGObj = G.MakeGenericType (new Type [] { TATest

                        ILGenerator il = Test.GetILGenerator ();

                        il.Emit (OpCodes.Ldnull);
                        il.Emit (OpCodes.Ldfld, TypeBuilder.GetField (TestGObj,
                        il.Emit (OpCodes.Pop);

                        il.Emit (OpCodes.Ret);
                Type rtG = G.CreateType ();
                P.CreateType ();

                Console.WriteLine ("Instance.exe");
                asmbuild.Save ("Instance.exe");

                object target = Activator.CreateInstance (rtG.MakeGenericType
(typeof (object)), null);
                rtG.MakeGenericType (typeof (object)).InvokeMember ("Foo",
BindingFlags.Public | BindingFlags.Instance | BindingFlags.InvokeMethod, null,
target, null);

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