load native lib (SWT) with JNI on windows

[Ranjit Mathew]

Tom Tromey wrote:
> Ranjit> BTW, as a quick hack I added something like:
> Ranjit>      args_size += ( this_arg_size < 4) ? 4 : this_arg_size;
> Ranjit> for each "this_arg_size" representing a JNI method parameter
> Ranjit> in "gcc/java/expr.c" (ref. my earlier patch)
> 
> I wish I could tell you the correct way to do this, but I don't know
> it.

"Inspired" by "gcc/config/i386/winnt.c" (gen_stdcall_suffix( )),
this part *could* look something like:
------------------------ 8< ----------------------------------
    for (tem = method_args; tem != NULL_TREE; tem = TREE_CHAIN (tem))
      {
        int arg_bits;

        arg_bits = TREE_INT_CST_LOW (TYPE_SIZE_UNIT (TREE_TYPE(tem)));

#ifdef (PARM_BOUNDARY)
        arg_bits = (((arg_bits + PARM_BOUNDARY - 1)
                     / PARM_BOUNDARY) * PARM_BOUNDARY);
#endif

        args_size += (arg_bits / BITS_PER_UNIT);

        args = tree_cons (NULL_TREE, tem, args);
      }
------------------------ 8< ----------------------------------

Since I'm not too familiar with GCC internals, this could be
quite off the track. :-(


> Ranjit> Unfortunately, for some reason, the interpreter still fails
> Ranjit> in executing the HelloSWT program. :-(
> 
> Do you have a stack trace?

Well, stack traces are something that still don't work
with the MinGW GCJ. :-(

Since even in this case the failure is in looking
up "IsDBCSLeadByte", it should be the same error as with
the compiled code.

Ranjit.

-- 
Ranjit Mathew          Email: rmathew AT hotmail DOT com

Bangalore, INDIA.      Web: http://ranjitmathew.tripod.com/