Re: Calling java code from C/C++ code.

[Timothy Wall <twall at oculustech dot com>]

This is linux x86, RedHat 7.0, using gcc 3.0 branch from CVS, and binutils
from the distribution.  The java code is very simple:

public class test {
    public static void execute() {
        main(new String[0]);
    }
    public static void main(String[] args) {
        System.out.println("Hello, world");
        System.exit(0);
    }
}

I believe dlopen loads the gc, using LD_LIBRARY_PATH to find it.  I have no
idea how that affects the weak references.

Tim

"Boehm, Hans" wrote:

> > -----Original Message-----
> > From: Timothy Wall [mailto:twall@oculustech.com]
> > (gdb) p GC_dump()
> > ***Static roots:
> > From 0x0 to 0x804a1d8
> >
> ...
> There's the problem.  The collector thinks that static data for the main
> program starts at location 0, and hence it's trying to scan memory from 0x0
> to 0x804a1d8.  Most of that isn't mapped.
>
> I assume your gcj installation works with a simple 100% Java program?  This
> is Linux/X86?  Which distribution?
>
> Does the garbage collector itself get loaded with a dlopen?  Does that
> affect processing of the weak references to __data_start and data_start?
>
> Hans