Problems merging DNS JNDI code

[Andrew Pinski]

Make sure that the c++filt from gcc is in your path when you run the 
program otherwise you get no encodings.

To get rid of BFD warnings, use a newer binutils (note this is not the 
problem).

Thanks,
Andrew Pinski

On Tuesday, February 19, 2002, at 12:37 , Pete Chown wrote:

> Hi,
>
> I checked out the head branch of gcc so I could have a shot at merging
> the DNS JNDI provider.  However it seems to be behaving oddly.  I
> eventually narrowed things down to this test case:
>
> -------------------------------------------------------------------------------
> package biz.skygate.test;
>
> public class Doofus {
>
>     public static void main(String args[])
>     {
> 	try {
> 	    throw new Exception();
> 	} catch(Exception e) {
> 	    e.printStackTrace();
> 	}
>     }
>
> }
> -------------------------------------------------------------------------------
>
> I build this as follows:
>
> % PATH=/home/nobackup/gcc-cvs/install/bin:$PATH gcj -g 
> --main=biz.skygate.test.Doofus biz/skygate/test/Doofus.java -o testdns
>
> (I used the --prefix argument to configure to put the CVS gcc in a
> special directory.  I add this prefix to the path at the start of the
> command.)
>
> I now run this command like this:
>
> % LD_LIBRARY_PATH=/home/nobackup/gcc-cvs/install/lib ./testdns
>
> I get a stack trace but it doesn't seem to have been decoded properly,
> and it has some extra error messages:
>
> -------------------------------------------------------------------------------
> BFD: Dwarf Error: Invalid or unhandled FORM value: 14.
> BFD: Dwarf Error: Could not find abbrev number 108.
> BFD: Dwarf Error: Invalid or unhandled FORM value: 14.
> BFD: Dwarf Error: Could not find abbrev number 108.
> java.lang.Exception
>    at 0x4024bdd1: _ZN4java4lang9ThrowableC1Ev (/home/nobackup/gcc-
> cvs/install/lib/libgcj.so.2)
>    at 0x4024024f: _ZN4java4lang9ExceptionC1Ev (/home/nobackup/gcc-
> cvs/install/lib/libgcj.so.2)
>    at 0x08048bcc: ?? 
> (/usr/src/build/53700-i386/BUILD/glibc-2.2.4/csu/init.c:0)
>    at 0x40227588: _ZN3gnu3gcj7runtime11FirstThread9call_mainEv 
> (/home/nobackup/gcc-cvs/install/lib/libgcj.so.2)
>    at 0x402aa948: _ZN3gnu3gcj7runtime11FirstThread3runEv 
> (/home/nobackup/gcc-cvs/install/lib/libgcj.so.2)
>    at 0x4023307c: _Z13_Jv_ThreadRunPN4java4lang6ThreadE 
> (/home/nobackup/gcc-cvs/install/lib/libgcj.so.2)
>    at 0x4020f9c4: _Z11_Jv_RunMainPN4java4lang5ClassEPKciPS4_b 
> (/home/nobackup/gcc-cvs/install/lib/libgcj.so.2)
>    at 0x4020faed: JvRunMain (/home/nobackup/gcc-
> cvs/install/lib/libgcj.so.2)
>    at 0x08048b94: main (/tmp/ccE1eCRK.i:12)
>    at 0x4064c627: __libc_start_main (/lib/i686/libc.so.6)
>    at 0x08048a71: _start (??:0)
> -------------------------------------------------------------------------------
>
> If I run it under gdb, I get a SIGPIPE during the printStackTrace:
>
> -------------------------------------------------------------------------------
> % LD_LIBRARY_PATH=/home/nobackup/gcc-cvs/install/lib gdb ./testdns
> GNU gdb Red Hat Linux (5.1-1)
> Copyright 2001 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and 
> you are
> welcome to change it and/or distribute copies of it under certain 
> conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB.  Type "show warranty" for 
> details.
> This GDB was configured as "i386-redhat-linux"...
> (gdb) run
> Starting program: /home/pc/spamdecoy/src/./testdns
> BFD: Dwarf Error: Invalid or unhandled FORM value: 14.
> BFD: Dwarf Error: Could not find abbrev number 108.
>
> Program received signal SIGPIPE, Broken pipe.
> 0x407109a4 in __libc_write () from /lib/i686/libc.so.6
> (gdb)
> -------------------------------------------------------------------------------
>
> Am I doing something obvious wrong here?  When I try to merge my DNS
> code, I get an exception somewhere, but it is difficult to see exactly
> what is going on because of this extra stuff.
>
> Incidentally I have made a snapshot of the DNS code available at:
>
> ftp://ftp.skygate.co.uk/pub/jndi-dns/
>
> If you would like to have a look, feel free, and let me know any
> comments.
>
> --
> Pete
>
>
>