Calling C# library from Java application: Process is terminated due to StackOverflowException

Question

I have a simple C# class library, I wrapped it in a C++/CLI class library and loaded it into a simple Java console application. But when I run the Java application, I get the following error:

Process is terminated due to StackOverflowException.

Process finished with exit code -1073741571 (0xC00000FD)

My C# library has a Class1.cs file:

using System;

namespace CSharpClassLibrary1
{
  public class Class1
  {
    public Class1() { }

    public void Print()
    {
      Console.WriteLine("Hello World From C#!");
    }
  }
}

My C++/CLI wrapper has two files: HelloWorld.h and CppClassLibrary1.cpp.

HelloWorld.h:

/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class HelloWorld */

#ifndef _Included_HelloWorld
#define _Included_HelloWorld
#ifdef __cplusplus
extern "C" {
#endif
  /*
   * Class:     HelloWorld
   * Method:    print
   * Signature: ()V
   */
  JNIEXPORT void JNICALL Java_HelloWorld_print
  (JNIEnv*, jobject);

#ifdef __cplusplus
}
#endif
#endif

I got it by running the command of the following form in my Java application: javac -h <directory> -d <directory> <source files>.

CppClassLibrary1.cpp:

#include "pch.h"
#include "HelloWorld.h"

using namespace CSharpClassLibrary1;

JNIEXPORT void JNICALL Java_HelloWorld_print(JNIEnv* env, jobject obj)
{
  Class1^ cls = gcnew Class1();
  cls->Print();
}

I added the CSharpClassLibrary1 as reference to the C++/CLI wrapper.

I added to the "Include directories" setting the following paths:

C:\Users\ns16\AppData\Local\JetBrains\Toolbox\apps\IDEA-C\ch-0\192.6817.14\jbr\include
C:\Users\ns16\AppData\Local\JetBrains\Toolbox\apps\IDEA-C\ch-0\192.6817.14\jbr\include\win32

My Java application has a HelloWorld.java file:

public class HelloWorld {

    public native void print();

    static {
        try {
            System.loadLibrary("CppClassLibrary1");
        } catch (UnsatisfiedLinkError e) {
            System.err.println("Native code library failed to load.\n" + e);
        }
    }

    public static void main(String[] args) {
        HelloWorld hw = new HelloWorld();
        hw.print();
    }
}

I specified the CppClassLibrary1 library path in the java.library.path variable.

Please help me! What am I doing wrong?

Update. A study of the problem showed the following:

1. In the Java application error appears in the hw.print(); line. If you comment it out, the application will start successfully.

2. If in the C++/CLI wrapper in the CppClassLibrary1.cpp file you replace Java_HelloWorld_print function body to the std::cout << "Hello World From C++/CLI!"; line, the Java application will start successfully and print the Hello World From C++/CLI! string.

3. If you create C# console application, add to it the C# library as references and add into Main method the Class1 cls = new Class1(); cls.print(); code, the application will start successfully and print the Hello World From C#! string.

Answer 1

I copied the C# library assembly in the directory with the java.exe file (in my system it located in C:\Users\ns16\AppData\Local\JetBrains\Toolbox\apps\IDEA-C\ch-0\192.6817.14\jbr\bin) and now the Java application works! I would not want to move the assembly out of the project directory, but this is the only solution I found.