Must unwind in gcc be ported for gcj?

Thu Feb 24 10:07:00 GMT 2011

On Thu, Feb 24, 2011 at 1:19 AM, majia gm <gmmajia@gmail.com> wrote:
> Hi, everyone.
>> I'm porting gcj (gcc-4.4.2) to another platform. Right now the gij
> fails when interpreting the following program.
>> File A.java:
>> import B;
> public class A{
>>        public static void main(String args[])
>        {
>                try{
>                        B b=(B)Class.forName("B").newInstance();
>                catch(Exception e)
>                {
>                        System.out.println("Cannot find Class B");
>                }
>        }
> }
>> File B.java:
>> public class B
> {}
>> I use gdb to track gij, and I found GetCallingClass() in forName()
> returns NULL, then the bootstrap loader is used to search the Class B
> but with no result. Should the Class B has the same class loader, the
> system class loader as the Class A dose?
>> Then I track the GetCallingClass(), and I found it needs the unwind
> function provided by gcc.  Must I port the unwind function?
>
Have a look at SJLJ_EXCEPTIONS. This should allow you to get something
working without having to port the full unwinder.
Bryce