[Bug c++/11990] "can't find linker symbol for virtual table for ..." when printing variables

[Bug c++/11990] "can't find linker symbol for virtual table for ..." when printing variables

[tromey at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=11990

Tom Tromey <tromey at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tromey at redhat dot com

--- Comment #2 from Tom Tromey <tromey at redhat dot com> 2013-02-22 21:49:33 UTC ---
*** Bug 15175 has been marked as a duplicate of this bug. ***

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[Bug c++/11990] "can't find linker symbol for virtual table for ..." when printing variables

[tromey at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=11990

Tom Tromey <tromey at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |archer
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2013-02-22
     Ever Confirmed|0                           |1

--- Comment #3 from Tom Tromey <tromey at redhat dot com> 2013-02-22 21:54:18 UTC ---
It seems possible to fix this with not much effort
in gnu-v3-abi.c:

(top-gdb) p vtable_symbol_name
$1 = 0x0
(top-gdb) p *vtable_symbol
$2 = {
  ginfo = {
    name = 0x21271d6 "_ZTVN10__cxxabiv120__function_type_infoE@@CXXABI_1.3", 
[...]


We could do some demangling hackery here.

But maybe it would be better to do this hackery when creating
the symbol in the first place.

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[Bug c++/11990] "can't find linker symbol for virtual table for ..." when printing variables

[tromey at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=11990

Tom Tromey <tromey at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at sourceware    |tromey at redhat dot com
                   |dot org                     |

--- Comment #4 from Tom Tromey <tromey at redhat dot com> 2013-02-25 17:18:22 UTC ---
Testing a patch.
It turns out I needed this to implement typeinfo properly anyhow.

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[Bug c++/11990] "can't find linker symbol for virtual table for ..." when printing variables

[tromey at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=11990

Tom Tromey <tromey at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |vz-gdb at zeitlins dot org

--- Comment #5 from Tom Tromey <tromey at redhat dot com> 2013-03-06 20:05:28 UTC ---
*** Bug 9541 has been marked as a duplicate of this bug. ***

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[Bug c++/11990] "can't find linker symbol for virtual table for ..." when printing variables

[cvs-commit at gcc dot gnu.org]

http://sourceware.org/bugzilla/show_bug.cgi?id=11990

--- Comment #6 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> 2013-04-15 17:30:37 UTC ---
CVSROOT:    /cvs/src
Module name:    src
Changes by:    tromey@sourceware.org    2013-04-15 17:30:36

Modified files:
    gdb            : ChangeLog c-lang.c c-typeprint.c cp-support.c 
                     cp-support.h dwarf2read.c gdbtypes.c 
                     gnu-v3-abi.c jv-lang.c jv-typeprint.c 
                     language.c symtab.c 

Log message:
    PR c++/11990:
    * c-lang.c (cplus_language_defn): Use gdb_demangle.
    * c-typeprint.c (c_type_print_base): Use gdb_demangle.
    * cp-support.c (mangled_name_to_comp): Use gdb_demangle.
    (gdb_demangle): New function.
    * cp-support.h (gdb_demangle): Declare.
    * dwarf2read.c (dwarf2_physname, fixup_partial_die)
    (dwarf2_name): Use gdb_demangle.
    * gdbtypes.c (check_stub_method): Use gdb_demangle.
    * gnu-v3-abi.c (gnuv3_rtti_type): Strip @plt and version
    suffixes from name.
    (gnuv3_print_method_ptr): Use gdb_demangle.
    * jv-lang.c (java_demangle): Use gdb_demangle.
    * jv-typeprint.c (java_type_print_base): Use gdb_demangle.
    * language.c (unk_lang_demangle): Use gdb_demangle.
    * symtab.c (symbol_find_demangled_name)
    (demangle_for_lookup): Use gdb_demangle.

Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/ChangeLog.diff?cvsroot=src&r1=1.15410&r2=1.15411
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/c-lang.c.diff?cvsroot=src&r1=1.106&r2=1.107
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/c-typeprint.c.diff?cvsroot=src&r1=1.91&r2=1.92
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/cp-support.c.diff?cvsroot=src&r1=1.61&r2=1.62
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/cp-support.h.diff?cvsroot=src&r1=1.55&r2=1.56
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/dwarf2read.c.diff?cvsroot=src&r1=1.780&r2=1.781
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/gdbtypes.c.diff?cvsroot=src&r1=1.250&r2=1.251
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/gnu-v3-abi.c.diff?cvsroot=src&r1=1.81&r2=1.82
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/jv-lang.c.diff?cvsroot=src&r1=1.109&r2=1.110
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/jv-typeprint.c.diff?cvsroot=src&r1=1.30&r2=1.31
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/language.c.diff?cvsroot=src&r1=1.114&r2=1.115
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/symtab.c.diff?cvsroot=src&r1=1.360&r2=1.361

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[Bug c++/11990] "can't find linker symbol for virtual table for ..." when printing variables

[tromey at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=11990

Tom Tromey <tromey at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |7.7

--- Comment #7 from Tom Tromey <tromey at redhat dot com> 2013-04-15 18:14:50 UTC ---
Fix checked in.

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[Bug c++/11990] "can't find linker symbol for virtual table for ..." when printing variables

[vz-gdb at zeitlins dot org]

http://sourceware.org/bugzilla/show_bug.cgi?id=11990

vz-gdb at zeitlins dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |

--- Comment #8 from vz-gdb at zeitlins dot org 2013-05-01 14:08:42 UTC ---
Thanks for your work on this but unfortunately I still see the bug even after
updating to the latest sources (I'm using the repository at
git://sourceware.org/git/gdb.git and built gdb_7_6-2013-04-26-release tag):

(gdb) p handler
$2 = (warning: can't find linker symbol for virtual table for `wxEvtHandler'
value
warning: can't find linker symbol for virtual table for `wxEvtHandler' value
wxEvtHandler *) 0x705eb0
(gdb) show version
GNU gdb (GDB) 7.6
Copyright (C) 2013 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 "x86_64-unknown-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.

When printing out the object contents I see the following:

    _vptr.wxObject = 0x62de90 <_ZTV6wxMenu@@WXU_2.9+16>,

Could the version suffix ("@WXU_2.9" part) be the problem?

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[Bug c++/11990] "can't find linker symbol for virtual table for ..." when printing variables

[tromey at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=11990

Tom Tromey <tromey at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |WAITING

--- Comment #9 from Tom Tromey <tromey at redhat dot com> 2013-05-02 18:55:33 UTC ---
> (gdb) show version
> GNU gdb (GDB) 7.6

The fix is in trunk, not in the 7.6 release.
Could you try it there instead?

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[Bug c++/11990] "can't find linker symbol for virtual table for ..." when printing variables

[vz-gdb at zeitlins dot org]

http://sourceware.org/bugzilla/show_bug.cgi?id=11990

vz-gdb at zeitlins dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|                            |FIXED

--- Comment #10 from vz-gdb at zeitlins dot org 2013-05-02 23:03:47 UTC ---
Oops, sorry, no idea why did I decide it was included in 7.6 (must have been
the combination of seeing this bug notification and that of 7.6 release close
together). I've retested with the latest git master and it works fine so far,
thanks a lot for fixing this and sorry for bothering you with reopening it.

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[Bug c++/11990] "can't find linker symbol for virtual table for ..." when printing variables

[vz-gdb at zeitlins dot org]

http://sourceware.org/bugzilla/show_bug.cgi?id=11990

--- Comment #11 from vz-gdb at zeitlins dot org 2013-05-02 23:28:40 UTC ---
After the last mistake I hesitate to reopen this once again but there is a
fatal bug in the latest version (binutils_latest_snapshot-1587-g51c07ff from
git master) which can result in an infinite recursion in
cp_lookup_symbol_namespace(). This already happened twice to me, once when
calling a function using "p gtk_xxx()" and another time simply when using TAB
completion after "p". I don't know if it's related to this change and
unfortunately I still don't have a simple reproducible example but this bug
definitely wasn't in 7.6.

Another regression possibly related to this change I noticed with the latest
version is that "b Foo::Bar" now creates 2 breakpoints: one on the real
function in C++ source itself and another at "Foo::Bar()@plt" which is hit
before the real breakpoint is. Again, this is something that didn't happen with
7.6.

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[Bug c++/11990] "can't find linker symbol for virtual table for ..." when printing variables

[vz-gdb at zeitlins dot org]

http://sourceware.org/bugzilla/show_bug.cgi?id=11990

--- Comment #12 from vz-gdb at zeitlins dot org 2013-05-02 23:58:19 UTC ---
OK, sorry, I really should stop updating this bug, but I need to say that the
infinite loop when resolving symbols bug *is* present in 7.6 too, I just hadn't
triggered it before somehow. I'm going to try to find when exactly did it
appear when I have a bit more time... For now all I can say is that it doesn't
seem to be present in 7.5.1, at least the same "p" command that reliably hangs
7.6 works correctly in it.

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[Bug c++/11990] "can't find linker symbol for virtual table for ..." when printing variables

[jackie.rosen at hushmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=11990

Jackie Rosen <jackie.rosen at hushmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jackie.rosen at hushmail dot com

--- Comment #13 from Jackie Rosen <jackie.rosen at hushmail dot com> ---
*** Bug 260998 has been marked as a duplicate of this bug. ***
Seen from the domain http://volichat.com
Page where seen: http://volichat.com/adult-chat-rooms
Marked for reference. Resolved as fixed @bugzilla.

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[Bug c++/11990] "can't find linker symbol for virtual table for ..." when printing variables

[schwab at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=11990

Andreas Schwab <schwab at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|jackie.rosen at hushmail dot com   |

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[Bug c++/11990] "can't find linker symbol for virtual table for ..." when printing variables

[seocontent01 at yandex dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=11990

Yzzy <seocontent01 at yandex dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |seocontent01 at yandex dot com

--- Comment #14 from Yzzy <seocontent01 at yandex dot com> ---
It's a pr_warn_once warning, so I cannot tell.
I'm not familiar with the glibc testsuite and will not debug this further.
I'm feeling these Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/ChangeLog.diff?cvsroot=src&r1=1.15410&r2=1.15411
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/c-lang.c.diff?cvsroot=src&r1=1.106&r2=1.107
http://g1negocios.com.br/
http://foxx99.com.br/
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/c-typeprint.c.diff?cvsroot=src&r1=1.91&r2=1.92
http://sourceware.org/cgi-bin/cvsweb.cgi/src/gdb/cp-support.c.diff?cvsroot=src&r1=1.61&r2=1.62

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[Bug c++/11990] "can't find linker symbol for virtual table for ..." when printing variables

[mark at klomp dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=11990

Mark Wielaard <mark at klomp dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mark at klomp dot org

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[Bug c++/11990] "can't find linker symbol for virtual table for ..." when printing variables

[viriketo at gmail dot com]

------- Additional Comments From viriketo at gmail dot com  2010-09-07 13:51 -------
To add some information, I rebuilt the shared object that had symbol versions. I
rebuilt it *without* symbol versions (it's build script had a version-script
that I took out).

Having removed the symbol versions, gdb gets the vtables perfectly, and DDD
shows all the object members perfectly too.

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