kern/53120: gdb issues with threaded programs

[martin%NetBSD.org@localhost]

>Number:         53120
>Category:       kern
>Synopsis:       gdb issues with threaded programs
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Mar 22 08:05:00 +0000 2018
>Originator:     Martin Husemann
>Release:        NetBSD 8.99.14
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD night-owl.duskware.de 8.99.14 NetBSD 8.99.14 (NIGHT-OWL) #590: Mon Mar 19 14:59:01 CET 2018 martin%night-owl.duskware.de@localhost:/usr/src/sys/arch/amd64/compile/NIGHT-OWL amd64
Architecture: x86_64
Machine: amd64
>Description:

Trying to debug some X / threaded programs does not work in -current:

(gdb) run
Starting program: /usr/pkg/bin/xfce4-clipman 
[New LWP 2 of process 459]

(xfce4-clipman:459): GVFS-RemoteVolumeMonitor-WARNING **: remote volume monitor with dbus name org.gtk.Private.HalVolumeMonitor is not supported

Thread 2 received signal SIGTRAP, Trace/breakpoint trap.
[Switching to LWP 2 of process 459]
0x00007f7ff123e7da in _sys___kevent50 () from /usr/lib/libc.so.12
(gdb) c
Continuing.

Thread 2 received signal SIGSEGV, Segmentation fault.
0x00007f7ff123e7da in _sys___kevent50 () from /usr/lib/libc.so.12
(gdb) c
Continuing.

Program terminated with signal SIGSEGV, Segmentation fault.
The program no longer exists.


>How-To-Repeat:
s/a

>Fix:
n/a