On 02/23/2011 05:19 PM, majia gm 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?
Short answer: Yes.
libgcj relies internally on exception handling.
You might be able to construct simple programs that don't throw
exceptions, but they are kind of a core language feature.
As you saw, the runtime startup code does throw and catch exceptions.
David Daney
