Re: [PATCH 5/5] gdb/testsuite: Add test that reads auxv in a multi-threaded inferior

[Alexandra Petlanova Hajkova <ahajkova@redhat.com>]

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On Fri, Mar 31, 2023 at 5:46 AM Thiago Jung Bauermann via Gdb-patches <
gdb-patches@sourceware.org> wrote:

> This test exercises reading the auxiliary vector in a program where the
> main thread exits before other threads.
>
> Because GDB's auxv cache makes it difficult to hit the race that this test
> exercises, add a maintenance command that flushes the cache.
>
> Also, move the fetch_auxv procedure from gdb.base/auxv to lib/gdb.exp so
> that the new testcase can use it.
> ---
>  gdb/auxv.c                         | 16 ++++++++
>  gdb/testsuite/gdb.base/auxv.exp    | 56 ---------------------------
>  gdb/testsuite/gdb.threads/auxv.c   | 62 ++++++++++++++++++++++++++++++
>  gdb/testsuite/gdb.threads/auxv.exp | 30 +++++++++++++++
>  gdb/testsuite/lib/gdb.exp          | 62 ++++++++++++++++++++++++++++++
>  5 files changed, 170 insertions(+), 56 deletions(-)
>  create mode 100644 gdb/testsuite/gdb.threads/auxv.c
>  create mode 100644 gdb/testsuite/gdb.threads/auxv.exp
>
>
I tested the series on ppc64le and I've got a failure for
gdb.threads/auxv.exp:

Running target unix
Using /usr/share/dejagnu/baseboards/unix.exp as board description file for
target.
Using /usr/share/dejagnu/config/unix.exp as generic interface file for
target.
Using
/root/build_upstream/gdb/testsuite/../../../binutils-gdb/gdb/testsuite/config/unix.exp
as tool-and-target-specific interface file.
Running
/root/build_upstream/gdb/testsuite/../../../binutils-gdb/gdb/testsuite/gdb.threads/auxv.exp
...
WARNING: Unrecognized tag value: 27   ???
              0x1c

WARNING: Unrecognized tag value: 28   ???
              0x20

FAIL: gdb.threads/auxv.exp: Get auxv after main thread exits

=== gdb Summary ===

# of expected passes 1
# of unexpected failures 1

Regards,
Alexandra