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To: Benjamin Kosnik <bkoz@redhat.com>
Cc: libstdc++@gcc.gnu.org, gdb@sources.redhat.com
Subject: Re: c++ debugging hosed
References: <200110291812.f9TICtQ10130@constant.com>
From: Jason Merrill <jason@redhat.com>
In-Reply-To: <200110291812.f9TICtQ10130@constant.com> (Benjamin Kosnik's
 message of "Mon, 29 Oct 2001 10:12:55 -0800")
Date: Sat, 03 Nov 2001 01:50:00 -0000
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>>>>> "Benjamin" == Benjamin Kosnik <bkoz@redhat.com> writes:

> On x86/linux, both --with-dwarf2 and default gcc-3.x toolchains can no
> longer find RTTI info:

> --with-dwarf2:
> (gdb) p *this
> can't find class named `std::basic_filebuf<char, std::char_traits<char> >', as given by C++ RTTI

> default:
> (gdb) p *this
> Attempt to take contents of a non-pointer value.

> Sadly, this bug has been around for 2 weeks now. It's making debugging
> C++ code more difficult than it should be. Any hope for a quick fix?

I just updated my gdb for the first time in months and ran into the same
problem.  Looks like the V3 ABI support code isn't ready for prime time.
Until it is, you can disable it with this patch:

*** gnu-v3-abi.c.~1~	Wed Nov 14 12:33:51 2001
--- gnu-v3-abi.c	Wed Nov 14 15:59:39 2001
*************** init_gnuv3_ops (void)
*** 349,355 ****
--- 360,368 ----
  void
  _initialize_gnu_v3_abi (void)
  {
+ #if 0
    init_gnuv3_ops ();
  
    register_cp_abi (gnu_v3_abi_ops);
+ #endif
  }