port-arm/56296: gdb spins in lib/libc/tls/t_tls_dlopen

[martin%NetBSD.org@localhost]

>Number:         56296
>Category:       port-arm
>Synopsis:       gdb spins in lib/libc/tls/t_tls_dlopen
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    port-arm-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Jul 03 15:45:00 +0000 2021
>Originator:     Martin Husemann
>Release:        NetBSD 9.99.86
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD unpluged.duskware.de 9.99.86 NetBSD 9.99.86 (UNPLUGED) #387: Sat Jul 3 10:36:35 CEST 2021 martin%seven-days-to-the-wolves.aprisoft.de@localhost:/work/src/sys/arch/evbarm/compile/UNPLUGED evbarm
Architecture: earmv5
Machine: evbarm
>Description:

During a ful ATF test run, this machine stops at:

lib/libc/tls/t_tls_dlopen (361/890): 1 test cases
    t_tls_dlopen:

Examining closer, the test crashes and ATF tries to get a backtrace, but
gdb spins and blocks atf. Killing gdb makes atf continue.

>How-To-Repeat:

cd /usr/tests/lib/libc/tls/ && atf-run t_tls_dlopen

>Fix:
n/a