Java – JNA memory leak

In view of this, C code:

void LoadData(char** myVar)
{
    std:: string str("[Really Long String Here]");
    unsigned int size = str.length() + 1;
    *myVar = new char[size];
    strncpy(*myVar,str.c_str(),size);
}

And this JNA Java:

Pointer myVar = new Memory(Pointer.SIZE);
this.Lib.LoadData(myVar);
this.someVar = myVar.getPointer(0).getString(0);

I have a memory leak. As far as I know, getpointer (0) should create a pointer object that should be released on finalize (), but it doesn't seem to be

Did I miss anything? This seems to meet the specification... I can run the above function without leakage penalty in C

I invoke Java code in a loop to test the leak. I tried to pause and manually call GC, which also expanded to gigabytes at a fairly fast rate.

I've been battling this problem for days, and it's easy to hang up trivial things like trying to free memory As far as I know, if I have an address, I can only release memory manually in Java, but I can't see how I do it

Edit:

It doesn't matter. I even think there is a way to manually pass JNA for free without extending it

Solution

Add this function to the C library

void FreeData(char** myVar)
{
    delete [] *myVar;
}

Then use it as JNA code

Pointer myVar = new Memory(Pointer.SIZE);
this.Lib.LoadData(myVar);
this.someVar = myVar.getPointer(0).getString(0);
this.Lib.FreeData(myVar);

In this way, memory can be allocated and deleted in C