[Bug tdep/15420] New: Thread support broken on 64-bit Solaris/x86

["ro at TechFak dot Uni-Bielefeld.DE" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=15420

             Bug #: 15420
           Summary: Thread support broken on 64-bit Solaris/x86
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: tdep
        AssignedTo: unassigned@sourceware.org
        ReportedBy: ro@TechFak.Uni-Bielefeld.DE
                CC: brobecker@adacore.com
    Classification: Unclassified
              Host: amd64-pc-solaris2.1[01]
            Target: amd64-pc-solaris2.1[01]
             Build: amd64-pc-solaris2.1[01]


This report is about gdb 7.6, but bugzilla doesn't yet provide that version.

When I start gdb, configured on Solaris 10/x86 with

configure CFLAGS='-g -O2 -m64' --prefix=/vol/gcc --disable-nls --without-python

I get this warning:

[GDB will not be able to debug user-mode threads: ld.so.1: gdb-7.6: fatal:
relocation error: file /lib/64/libthread_db.so.1: symbol ps_lgetxregsize:
referenced symbol not found]

This is a regression from gdb 7.5 where this worked and the function (required
by libthread_db.so.1) was provided by the gdb binary.  This is obviously due to
this change:

2012-09-27  Joel Brobecker  <brobecker@adacore.com>

        * sol-thread.c (ps_lgetxregsize, ps_lgetxregs, ps_lsetxregs):
        Move these functions to sparc-sol-thread.c.
        * sparc-sol-thread.c: New file.
        * configure.ac: Add sparc-sol-thread.o to CONFIG_OBS and
        sparc-sol-thread.c to CONFIG_SRCS for sparc-solaris native
        configurations.
        * configure: Regenerate.

The functions are incorrectly taken to be sparc-specific.  If I add
sparc-sol-thread.c to the Solaris/x86 build by editing configure, gdb starts
again as expected.

  Rainer

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