[Bug general/23732] New: Test failures on sparc64-linux-gnu

[Bug general/23732] New: Test failures on sparc64-linux-gnu

[kelledin at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=23732

            Bug ID: 23732
           Summary: Test failures on sparc64-linux-gnu
           Product: elfutils
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: general
          Assignee: unassigned at sourceware dot org
          Reporter: kelledin at gmail dot com
                CC: elfutils-devel at sourceware dot org
  Target Milestone: ---

elfutils-0.174 (and at least as far back as 0.170) is failing three tests for
me:

==========================================
   elfutils 0.174: tests/test-suite.log
==========================================

# TOTAL: 202
# PASS:  194
# SKIP:  5
# XFAIL: 0
# FAIL:  3
# XPASS: 0
# ERROR: 0

.. contents:: :depth: 2

FAIL: run-strip-nothing.sh
==========================

/usr/src/elfutils-0.174/src/elfcmp: a.out strip.out differ: section [5]
'.dynsym' header
*** failed strip.out different from a.out
FAIL run-strip-nothing.sh (exit status: 255)

FAIL: run-backtrace-native.sh
=============================

0x10000000000   0x10000104000   /usr/src/elfutils-0.174/tests/backtrace-child
0xffff800100000000      0xffff800100126000     
/lib/sparc64-linux-gnu/ld-2.27.so
0xffff800100128000      0xffff800100244000     
/lib/sparc64-linux-gnu/libpthread-2.27.so
0xffff80010047a000      0xffff80010047c000      [vdso: 91062]
0xffff80010047c000      0xffff8001006e8000     
/lib/sparc64-linux-gnu/libc-2.27.so
TID 91062:
# 0 0xffff80010013beb0          raise
TID 91067:
# 0 0xffff80010013beb0          raise
/usr/src/elfutils-0.174/tests/backtrace: dwfl_thread_getframes: No DWARF
information found
/usr/src/elfutils-0.174/tests/backtrace: dwfl_thread_getframes: No DWARF
information found
backtrace: backtrace.c:81: callback_verify: Assertion `seen_main' failed.
./test-subr.sh: line 84: 91057 Aborted                 (core dumped)
LD_LIBRARY_PATH="${built_library_path}${LD_LIBRARY_PATH:+:}$LD_LIBRARY_PATH"
$VALGRIND_CMD "$@"
backtrace-child: no main
FAIL run-backtrace-native.sh (exit status: 1)

SKIP: run-backtrace-data.sh
===========================

/usr/src/elfutils-0.174/tests/backtrace-data: Unwinding not supported for this
architecture
data: arch not supported
SKIP run-backtrace-data.sh (exit status: 77)
FAIL: run-backtrace-dwarf.sh
============================

0xffff8001004d88d4      raise
/usr/src/elfutils-0.174/tests/backtrace-dwarf: dwfl_thread_getframes: No DWARF
information found
dwarf: no main
FAIL run-backtrace-dwarf.sh (exit status: 1)

SKIP: run-backtrace-native-biarch.sh
====================================

biarch testing disabled
SKIP run-backtrace-native-biarch.sh (exit status: 77)

SKIP: run-backtrace-native-core.sh
==================================

/usr/bin/coredumpctl
No match found.
-- Notice: 2 systemd-coredump@.service units are running, output may be
incomplete.
No match found.
-- Notice: 1 systemd-coredump@.service unit is running, output may be
incomplete.
No match found.
-- Notice: 1 systemd-coredump@.service unit is running, output may be
incomplete.
No core.91173 file generated
SKIP run-backtrace-native-core.sh (exit status: 77)

SKIP: run-backtrace-native-core-biarch.sh
=========================================

biarch testing disabled
SKIP run-backtrace-native-core-biarch.sh (exit status: 77)

SKIP: run-lfs-symbols.sh
========================

LFS testing is irrelevent on this system
SKIP run-lfs-symbols.sh (exit status: 77)

============================================================================
Testsuite summary for elfutils 0.174
============================================================================
# TOTAL: 202
# PASS:  194
# SKIP:  5
# XFAIL: 0
# FAIL:  3
# XPASS: 0
# ERROR: 0
============================================================================

(run-backtrace-native-core-biarch.sh was also failing, but I've put that on a
back burner for now while I dig into the other failures.  I can turn it back on
if someone wants the failure output).

run-strip-nothing.sh appears to rearrange the ELF section contents without
actually deleting anything obvious, but whatever it changes is enough to upset
elfcmp.  I actually examined the .dynsym section as best I knew how (with
binutils "readelf --dyn-syms"), and the resulting dump looked identical for
both a.out and strip.out.

run-backtrace-native.sh is pretty obvious: it doesn't see main() in the
backtrace, probably because it can't actually *get* the full backtrace without
DWARF info.  run-backtrace-dwarf.sh failure can probably be traced back to the
same root cause, and I would assume the related biarch test as well was failing
for the same reason.

For background, this is on a mostly-vanilla 4.16.18 kernel, gcc-8.2.0,
binutils-2.31.1, glibc-2.27, with SPARC T2000 CPUs.  Typical build flags are
"-O2 -m64 -mcpu=v9 -mtune=v9", although I've tried different optimization
levels and different (or absent) -mcpu/-mtune flags, with no apparent
difference.  gdb is not installed yet, because I'm still in the process of
bootstrapping a distro build from scratch.  I can supply the raw test-suite.log
on request.

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[Bug general/23732] Test failures on sparc64-linux-gnu

[jose.marchesi at oracle dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=23732

Jose E. Marchesi <jose.marchesi at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2018-10-03
                 CC|                            |jose.marchesi at oracle dot com
           Assignee|unassigned at sourceware dot org   |jose.marchesi at oracle dot com
     Ever confirmed|0                           |1

--- Comment #1 from Jose E. Marchesi <jose.marchesi at oracle dot com> ---
Hi Frank.

Of the failures you report, I can only reproduce the failure in
run-strip-nothing.sh.  Looking at it.

Regarding the failure in the backtrack, it is probably due to the fact the
debugging information for glibc is not available in your system.

Salud!

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[Bug general/23732] Test failures on sparc64-linux-gnu

[jose.marchesi at oracle dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=23732

Jose E. Marchesi <jose.marchesi at oracle dot com> changed:

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

--- Comment #2 from Jose E. Marchesi <jose.marchesi at oracle dot com> ---
Allright, this turned out to be a BFD bug, not an elfutils bug.

Fixed with the binutils commit below.
Salud!

commit 6d0a6093c5fe82eb4c2b67d3d10fa44eeb0bc98b
Author: Jose E. Marchesi <jose.marchesi@oracle.com>
Date:   Thu Oct 4 02:12:48 2018 -0700

    bfd,sparc: fix the .dynsym sh_index when stripping all symbols in ld

    The SPARC ELF BFD backend uses a hack in order to accomodate the
    STT_REGISTER symbols mandated by the SPARC V9 ABI for 64-bit objects.
    The hack works as follows:

    - Early in `size_dynamic_symbols', it adds the dynamic STT_REGISTER
      symbols and the corresponding DT_SPARC_REGISTER tags if needed,
      i.e. if the input object has been annotated by the assembler to use
      any of the global registers requiring annotations by the ABI.

      The STT_REGISTER symbols are not local, but nevertheless they are
      added to the end of the dynlocal linked list (eek, yes) to be fixed
      "later".  This is done so the symbols are emitted in the symtab.

    - Consequently, when the `sh_info' field of the .dynsym section is
      calculated in `bfd_elf_final_link' to be `local_dynsymcount + 1', it
      may have the wrong value, since the real first global symbol is the
      first STT_REGISTER symbol.

    - However, this temporary inconsistency is fixed in the
      `elf64_sparc_output_arch_syms' backend hook: the sh_index is
      adjusted to its rightful value.  So all is well and good.

    However the 2015 changeset

    commit 8539e4e89eb4c54bb6668582cd709765a3803588
    Author: Alan Modra <amodra@gmail.com>
    Date:   Thu Jan 15 19:42:59 2015 +1030

        Fix ARM fail of gap test

        ld-elf/gap test was failing due to the ARM backend attempting to output
        arch symbols when ld -s (strip all symbols) is in force.  This patch
        stops that happening and tidies the code a little.

    made the `elf_backend_output_arch_syms' backend hook to not be called
    when all symbols are to be stripped.  This resulted in an incorrect
    sh_index for .dynsym when a link is performed with -s (strip_all), in
    64-bit sparc ELF objects.

    This patch moves the sh_index adjusting code from the target
    `output_arch_syms' to `finish_dynamic_sections'.  It also removes the
    strip_all check from `elf64_sparc_output_arch_syms', as the function
    is no longer called in that case.

    Tested in sparc64-linux-gnu and sparc-linux-gnu.
    No regressions observed.

    bfd/ChangeLog:

    2018-10-04  Jose E. Marchesi  <jose.marchesi@oracle.com>

            * elf64-sparc.c (elf64_sparc_output_arch_syms): Do not correct the
            impact of STT_REGISTER symbols in the dynsym sh_index here...
            * elfxx-sparc.c (_bfd_sparc_elf_finish_dynamic_sections): ... but
            do it here.

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[Bug general/23732] Test failures on sparc64-linux-gnu

[sam at gentoo dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=23732

Sam James <sam at gentoo dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://sourceware.org/bugz
                   |                            |illa/show_bug.cgi?id=26236

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[Bug general/23732] Test failures on sparc64-linux-gnu

[sam at gentoo dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=23732

Sam James <sam at gentoo dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|https://sourceware.org/bugz |
                   |illa/show_bug.cgi?id=26236  |

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