Compiler bug in VC++ .Net 2003

[Sergey Golovkin via .NET 247]

Hi

I have very strange situations.
The following code always crashes any .Net appication that uses it.

What I have:
1. The Managed C++ code (test.h and test.cpp) that defines enumeration "Els" and function that returns an array of values of this enum "Els" as output parameter "outParam".

-------------------------------- test.h --------------------------
#pragma once

using namespace System::Runtime::InteropServices;

#define V_OK 17235968
#define V_HALT 17235969
#define V_CRASH 17235970

namespace managedC
{
public __value enum Els : unsigned int
{
Ok = V_OK,
Halt = V_HALT,
Crash = V_CRASH
};
public __gc class testClass
{
public:
static void TestMethodEnum([OutAttribute] Els (*outParam)[]);
};
}
-------------------------------- test.h --------------------------
-------------------------------- test.cpp --------------------------
#include "test.h"

#using <mscorlib.dll>

namespace managedC
{
void testClass::TestMethodEnum([OutAttribute] Els (*outParam)[])
{
*outParam = new Els[2];

for(int i = 0; i < (*outParam)->Length; i++)
(*outParam) = Els::Crash;
}
}
-------------------------------- test.cpp --------------------------
2. The C# code that has infinite loop and calls method "TestMethodEnum" inside.
-------------------------------- test.cs --------------------------
using System;
using System.Collections;

using managedC;

namespace marshalBug
{
class Class1
{
[STAThread]
static void Main(string[] args)
{
for(int i = 0; ; i++)
{
Els[] paramEnum;
testClass.TestMethodArray(out paramEnum);

foreach(Els t in paramEnum)
Console.WriteLine(t);

GC.Collect();
}
}
}
}
-------------------------------- test.cs --------------------------
This code works only one circle until GC.Collect(). The CG crashes.

Who can me say what is this ? Is this a bug in compiler ?
Are there anybody who have the same situalion ?

Thanks

ps:
Are there any fixes or SP for VC 2003 ?

--------------------------------
From: Sergey Golovkin

-----------------------
Posted by a user from .NET 247 (http://www.dotnet247.com/)

<Id>ctyYzdnzsEG6y3RYxEOvLA==</Id>

[Jochen Kalmbach [MVP]]

Hi Sergey!

void testClass::TestMethodEnum([OutAttribute] Els (*outParam)[])
{
*outParam = new Els[2];

for(int i = 0; i < (*outParam)->Length; i++)
(*outParam) = Els::Crash;
}

You should replace the line
(*outParam) = Els::Crash;
with
(*outParam)[i] = Els::Crash;

--
Greetings
Jochen

My blog about Win32 and .NET
http://blog.kalmbachnet.de/

[mapi33dev]

Hi Jochen

Of course this line is :
(*outParam)[i] = Els::Crash;

BUT FORUM WEB UI REPLACES IT TO SMILE :-((

-------------------------------- test.h --------------------------
#pragma once

using namespace System::Runtime::InteropServices;

#define V_OK 17235968
#define V_HALT 17235969
#define V_CRASH 17235970

namespace managedC
{
public __value enum Els : unsigned int
{
Ok = V_OK,
Halt = V_HALT,
Crash = V_CRASH
};
public __gc class testClass
{
public:
static void TestMethodEnum([OutAttribute] Els (*outParam)[]);
};
}
-------------------------------- test.h --------------------------
-------------------------------- test.cpp --------------------------
#include "test.h"

#using <mscorlib.dll>

namespace managedC
{
void testClass::TestMethodEnum([OutAttribute] Els (*outParam)[])
{
*outParam = new Els[2];

for(int i = 0; i < (*outParam)->Length; i++)
(*outParam)[i] = Els::Crash;
}
}
-------------------------------- test.cpp --------------------------
-------------------------------- test.cs --------------------------
using System;
using System.Collections;

using managedC;

namespace marshalBug
{
class Class1
{
[STAThread]
static void Main(string[] args)
{
for(int i = 0; ; i++)
{
Els[] paramEnum;
testClass.TestMethodArray(out paramEnum);

foreach(Els t in paramEnum)
Console.WriteLine(t);

GC.Collect();
}
}
}
}
-------------------------------- test.cs --------------------------