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Date:      Wed, 9 Dec 2009 12:21:22 +0200
From:      Kostik Belousov <kostikbel@gmail.com>
To:        Steven Hartland <killing@multiplay.co.uk>
Cc:        freebsd-hackers@freebsd.org, freebsd-stable@freebsd.org
Subject:   Re: nginx + passenger = segv in _rtld_error on restart on FreeBSD 8.0?
Message-ID:  <20091209102122.GC43143@deviant.kiev.zoral.com.ua>
In-Reply-To: <6B44BF0945694D98BC060164D404B5A9@multiplay.co.uk>
References:  <6B44BF0945694D98BC060164D404B5A9@multiplay.co.uk>

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On Wed, Dec 09, 2009 at 01:48:38AM -0000, Steven Hartland wrote:
> I'm currently testing nginx + passenger on FreeBSD 8.0 and I'm seeing a=
=20
> strange
> segv which seems to indicate a core library error in _rtld_error. Could t=
his
> be the case or is the stack just badly corrupted?
>=20
> (gdb) bt
> #0  0x00000008005577dc in _rtld_error () from /libexec/ld-elf.so.1
> #1  0x0000000800557c3f in _rtld_error () from /libexec/ld-elf.so.1
> #2  0x0000000800557d5e in _rtld_error () from /libexec/ld-elf.so.1
> #3  0x000000080055851b in dladdr () from /libexec/ld-elf.so.1
> #4  0x00000008005585f3 in dladdr () from /libexec/ld-elf.so.1
> #5  0x000000080055576d in ?? () from /libexec/ld-elf.so.1
> #6  0x0000000000000001 in ?? ()
> #7  0x00000000004117f8 in=20
> boost::detail::sp_counted_impl_p<Passenger::Application::StandardSession>=
::dispose (this=3D0x800768980) at=20
> sp_counted_impl.hpp:78
> Previous frame inner to this frame (corrupt stack?)

You need to rebuild rtld with debugging information. Ideally, all shared
objects should have valid debug info.

At least, enter src/libexec/rtld-elf and do
make obj
make depend
make all install DEBUG_FLAGS=3D-g

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