Bug 4183 - Dynamic method owner value is ignored
Summary: Dynamic method owner value is ignored
Status: RESOLVED FIXED
Alias: None
Product: Runtime
Classification: Mono
Component: Verifier ()
Version: unspecified
Hardware: PC Linux
: Normal normal
Target Milestone: ---
Assignee: Rodrigo Kumpera
URL:
Depends on:
Blocks:
 
Reported: 2012-04-02 06:38 UTC by Marek Safar
Modified: 2012-09-03 11:13 UTC (History)
3 users (show)

Tags:
Is this bug a regression?: ---
Last known good build:

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Status:
RESOLVED FIXED

Description Marek Safar 2012-04-02 06:38:59 UTC
using System;
using System.Collections.Generic;
using System.Reflection.Emit;
using System.Reflection;
using System.Security;

[assembly: SecurityCriticalAttribute]

class A
{
	protected A ()
	{
	}
}

class C
{
	public static void Main ()
	{
		var ctor = typeof (A).GetConstructors (BindingFlags.NonPublic | BindingFlags.Instance)[0];

		DynamicMethod dynamicMethod = new DynamicMethod (
			"CallCtor_1",
			MethodAttributes.Public | MethodAttributes.Static,
			CallingConventions.Standard,
			typeof (void), new[] { typeof (object) },
			typeof (A),
			false);

		ILGenerator il = dynamicMethod.GetILGenerator ();
		il.Emit (OpCodes.Ldarg_0);
		il.Emit (OpCodes.Call, ctor);
		il.Emit (OpCodes.Ret);
		var aa = (Action<object>) dynamicMethod.CreateDelegate (typeof (Action<object>));
		aa (null);
	}
}

Run on mono with --verify-all

Unhandled Exception: System.Security.VerificationException: Error verifying (wrapper dynamic-method) A:CallCtor_1 (object): Cannot call a constructor outside one at 0x0001
  at (wrapper managed-to-native) System.Delegate:CreateDelegate_internal (System.Type,object,System.Reflection.MethodInfo,bool)
  at System.Delegate.CreateDelegate (System.Type type, System.Object firstArgument, System.Reflection.MethodInfo method, Boolean throwOnBindFailure, Boolean allowClosed) [0x00000] in <filename unknown>:0 

No error on .net
Comment 1 Rodrigo Kumpera 2012-09-03 11:13:56 UTC
Fixed on master. Only under non-strict mode. So peverify will still flag this as invalid, but the runtime won't.