Problems merging DNS JNDI code

Tue Feb 19 11:13:00 GMT 2002

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
>>>