RE: [ECOS] Linux Synthetic target problems

["Tyler Wilson" <TWilson at ugobe dot com>]

Sergei,

Just to be clear: do you get the same internal error as I do? See here:

twilson@andLinux:~/examples-build$ gdb ./hello
GNU gdb 6.8-debian
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show
copying"
and "show warranty" for details.
This GDB was configured as "i486-linux-gnu"...
/build/buildd/gdb-6.8/gdb/dwarf2-frame.c:1837: internal-error:
decode_frame_entry_1: Assertion `fde->cie != NULL' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n)

Thank you,
Tyler

> -----Original Message-----
> From: Sergei Gavrikov [mailto:sergei.gavrikov@gmail.com]
> Sent: Friday, September 05, 2008 3:27 PM
> To: Tyler Wilson
> Cc: Bart Veer; ecos-discuss@ecos.sourceware.org
> Subject: Re: [ECOS] Linux Synthetic target problems
> 
> Wilson wrote:
> > WRT to the GDB 6.6 issue: I upgraded my Ubuntu 7.10 to Ubuntu 8.04,
> > which puts gdb at 6.8 and gcc at 4.2.3. I rebuilt the synthetic
> target
> > and examples, and I am getting the same internal gdb errors.
> >
> > Does this set up work for anybody else?
> >
> > I will try the gcc 3.4(.6) tool chain next.
> 
> Hm. I have installed Ubuntu 7.04 at work and Andrew's suggest about
> -fno-stack-protector works for me. I can build the synthetic target
> tests and run then with a distro's gdb.
> 
> At home I have installed same as you distro 8.04 and I was just
> wounder,
> would I build and run the target tests in gdb 6.8-debian? No, I could
> not. gdb 6.8 did crash.
> 
> I passed about one hour tuning CFLAGS (optimization and stack
> protector)
> and changing distro's GCC/GXX: gcc-3.4.6, gcc-4.1.3, gcc-4.2.3. The
gdb
> 6.8 crashed every time and I did remember what
> 
> Bart Veer wrote:
> > > Note that this is a bug in the Ubuntu release of gdb, not in the
> > > synthetic target. If you want to debug a synthetic target
> > > application then you will probably have to upgrade or downgrade
> your
> > > version of gdb.
> 
> I did follow Bart's suggest and became to test the force installed
> Debian GDBs: experimental/tested/unstable/stable. No success.  All GDB
> crashed. Hm. It's possible, it's a hard friday night.
> 
> > > The synthetic target is vulnerable to changes in both the Linux
> > > kernel and the toolchain - compiler, linker, ... Actually all of
> > > eCos is vulnerable to toolchain changes, but for most targets
> people
> > > stick with known good toolchains they have downloaded. For the
> > > synthetic target people use whatever toolchain is installed with
> > > their Linux distribution. Generally that is of newer vintage than
> > > the cross-compilers so more likely to show up problems.
> 
> If it is not friday I will agree with the Bart's conclusion the above,
> because I tried both instaled kernels which I have at home: 2.6.24-18
> and 2.6.24-19, No success. Someone said here that a stable toolchain
> is not a big deal. I think what Tyler do not share this conclusion.
> 
> Tyler, if you will get the results with synthetic builds and GDB on
> Ubuntu 8.04, please, enlighten me too.
> 
> Sergei

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