Re: pkg/54310 (glib2-2.60.4 breaks qemu)

[Patrick Welche <prlw1%cam.ac.uk@localhost>]

The following reply was made to PR pkg/54310; it has been noted by GNATS.

From: Patrick Welche <prlw1%cam.ac.uk@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: pkg/54310 (glib2-2.60.4 breaks qemu)
Date: Thu, 20 Jun 2019 10:57:15 +0100

 qemu seems to be sitting in a tight loop checking cpus. How on earth
 glib comes in, I don't know - I'll look at gthread...
 
 no obvious gnome in here:
 
 
 (gdb) thread apply all bt
 
 Thread 5 (LWP 1 of process 14):
 #0  0x00007f7fee4429ba in poll () from /usr/lib/libc.so.12
 #1  0x00007f7feec07db2 in poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at /usr/src/lib/libpthread/pthread_cancelstub.c:412
 #2  0x00000000006d3aa4 in os_host_main_loop_wait (timeout=1000000000) at util/main-loop.c:231
 #3  main_loop_wait (nonblocking=nonblocking@entry=0) at util/main-loop.c:512
 #4  0x00000000004ce88c in main_loop () at vl.c:1970
 #5  0x0000000000776d03 in main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at vl.c:4604
 
 Thread 4 (LWP 2 of process 14):
 #0  0x00007f7fee4ade7a in ___lwp_park60 () from /usr/lib/libc.so.12
 #1  0x00007f7feec0a84e in pthread_cond_timedwait (cond=0xf20710 <rcu_call_ready_event+48>, mutex=0xf206e0 <rcu_call_ready_event>, abstime=0x0) at /usr/src/lib/libpthread/pthread_cond.c:169
 #2  0x00000000006d69da in qemu_futex_wait (val=4294967295, ev=0xf206e0 <rcu_call_ready_event>) at util/qemu-thread-posix.c:347
 #3  qemu_event_wait (ev=ev@entry=0xf206e0 <rcu_call_ready_event>) at util/qemu-thread-posix.c:442
 #4  0x00000000006e49f3 in call_rcu_thread (opaque=opaque@entry=0x0) at util/rcu.c:261
 #5  0x00000000006d60a7 in qemu_thread_start (args=0x7f7ff7e88600) at util/qemu-thread-posix.c:502
 #6  0x00007f7feec0c1d8 in pthread__create_tramp (cookie=0x7f7ff7e2f000) at /usr/src/lib/libpthread/pthread.c:593
 #7  0x00007f7fee48f340 in ?? () from /usr/lib/libc.so.12
 #8  0x0000000000400000 in ?? ()
 #9  0x00007f7fe1200000 in ?? ()
 #10 0x0000001003a0efff in ?? ()
 #11 0x00007f7fe10000c0 in ?? ()
 #12 0x00000000001fff40 in ?? ()
 #13 0x0000000000000000 in ?? ()
 
 Thread 3 (LWP 3 of process 14):
 #0  0x00007f7fee48f02a in ____sigtimedwait50 () from /usr/lib/libc.so.12
 #1  0x00007f7feec08194 in sigwait (set=set@entry=0x7f7ff7b836a0, sig=sig@entry=0x7f7fe09efedc) at /usr/src/lib/libpthread/pthread_cancelstub.c:609
 #2  0x00000000006d4c8c in sigwait_compat (opaque=opaque@entry=0x7f7ff7b836a0) at util/compatfd.c:36
 #3  0x00000000006d60a7 in qemu_thread_start (args=0x7f7ff7b836c0) at util/qemu-thread-posix.c:502
 #4  0x00007f7feec0c1d8 in pthread__create_tramp (cookie=0x7f7ff7e30c00) at /usr/src/lib/libpthread/pthread.c:593
 #5  0x00007f7fee48f340 in ?? () from /usr/lib/libc.so.12
 #6  0x0000000000000000 in ?? ()
 
 Thread 2 (LWP 5 of process 14):
 #0  qemu_tcg_rr_cpu_thread_fn (arg=arg@entry=0x7f7ff7a0bf40) at /tmp/pkgsrc/emulators/qemu/work.x86_64/qemu-4.0.0/cpus.c:1517
 #1  0x00000000006d60a7 in qemu_thread_start (args=0x7f7ff7b7c540) at util/qemu-thread-posix.c:502
 #2  0x00007f7feec0c1d8 in pthread__create_tramp (cookie=0x7f7ff7e34400) at /usr/src/lib/libpthread/pthread.c:593
 #3  0x00007f7fee48f340 in ?? () from /usr/lib/libc.so.12
 #4  0x5641554154415355 in ?? ()
 #5  0xc48148ef8b485741 in ?? ()
 #6  0xc033e6fffffffb78 in ?? ()
 #7  0x4100000488c48148 in ?? ()
 #8  0x5b5c415d415e415f in ?? ()
 #9  0x000000000000c35d in ?? ()
 #10 0x0000000000000000 in ?? ()
 
 Thread 1 (LWP 5 of process 14):
 #0  qemu_tcg_rr_cpu_thread_fn (arg=arg@entry=0x7f7ff7a0bf40) at /tmp/pkgsrc/emulators/qemu/work.x86_64/qemu-4.0.0/cpus.c:1517
 #1  0x00000000006d60a7 in qemu_thread_start (args=0x7f7ff7b7c540) at util/qemu-thread-posix.c:502
 #2  0x00007f7feec0c1d8 in pthread__create_tramp (cookie=0x7f7ff7e34400) at /usr/src/lib/libpthread/pthread.c:593
 #3  0x00007f7fee48f340 in ?? () from /usr/lib/libc.so.12
 #4  0x5641554154415355 in ?? ()
 #5  0xc48148ef8b485741 in ?? ()
 #6  0xc033e6fffffffb78 in ?? ()
 #7  0x4100000488c48148 in ?? ()
 #8  0x5b5c415d415e415f in ?? ()
 #9  0x000000000000c35d in ?? ()
 #10 0x0000000000000000 in ?? ()