qemu/util
Paolo Bonzini a59629fcc6 rcu: do not create thread in pthread_atfork callback
If QEMU forks after the CPU threads have been created, qemu_mutex_lock_iothread
will not be able to do qemu_cpu_kick_thread.  There is no solution other than
assuming that forks after the CPU threads have been created will end up in an
exec.  Forks before the CPU threads have been created (such as -daemonize)
have to call rcu_after_fork manually.

Notably, the oxygen theme for GTK+ forks and shows a "No such process" error
without this patch.

This patch can be reverted once the iothread loses the "kick the TCG thread"
magic.

User-mode emulation does not use the iothread, so it can also call
rcu_after_fork.

Reported by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Tested by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-04-01 10:06:38 +02:00
..
acl.c acl: fix memory leak 2014-11-17 11:48:56 +01:00
aes.c aes: remove a dead return statement 2015-02-10 09:27:20 +03:00
bitmap.c bitmap: use long as index 2014-01-13 14:04:53 +01:00
bitops.c bitops: unroll while loop in find_next_bit() 2013-03-26 13:32:32 +01:00
compatfd.c Add a 'name' parameter to qemu_thread_create 2014-03-09 21:09:38 +02:00
crc32c.c qemu: add castagnoli crc32c checksum algorithm 2013-05-03 10:31:58 +02:00
cutils.c cutils: refine strtol error handling in parse_debug_env 2015-03-10 08:15:33 +03:00
envlist.c utils: drop strtok_r from envlist_parse 2015-02-16 16:20:02 -06:00
error.c error: Use error_report_err() where appropriate 2015-02-18 10:51:09 +01:00
event_notifier-posix.c sysemu: avoid proliferation of include/ subdirectories 2013-04-15 18:19:25 +02:00
event_notifier-win32.c
fifo8.c savevm: Remove all the unneeded version_minimum_id_old (arm) 2014-05-13 16:09:35 +01:00
getauxval.c util: Move general qemu_getauxval to util/getauxval.c 2014-09-09 13:13:05 +02:00
hbitmap.c util: Use g_new() & friends where that makes obvious sense 2014-12-10 11:34:15 +03:00
hexdump.c Rename hexdump to avoid FreeBSD libutil conflict 2013-05-20 08:20:08 -05:00
host-utils.c util: Don't link host-utils.o if it's empty 2014-09-09 13:13:05 +02:00
id.c util: Emancipate id_wellformed() from QemuOpts 2014-10-03 10:30:33 +01:00
iov.c util: Use g_new() & friends where that makes obvious sense 2014-12-10 11:34:15 +03:00
Makefile.objs rcu: add rcu library 2015-02-02 16:55:10 +01:00
module.c module: Don't complain when a module is absent 2014-07-18 14:57:35 +02:00
notify.c notify: add NotiferWithReturn so notifier list can abort 2013-06-28 09:20:26 +02:00
osdep.c do not call g_thread_init() for glib >= 2.31 2014-05-07 21:00:43 +04:00
oslib-posix.c oslib-posix: Fix compiler warning (-Wclobbered) and simplify the code 2015-03-10 08:15:34 +03:00
oslib-win32.c memory: expose alignment used for allocating RAM as MemoryRegion API 2014-11-23 12:11:30 +02:00
path.c util/path: Use the GLib memory allocation routines 2014-08-24 13:16:32 +04:00
qemu-config.c QemuOpts: Drop qemu_opt_set(), rename qemu_opt_set_err(), fix use 2015-02-26 14:49:31 +01:00
qemu-error.c qemu-error: Add error_vreport() 2014-10-09 15:36:15 +02:00
qemu-openpty.c util/qemu-openpty: fix build with musl libc by include termios.h as fallback 2014-06-11 00:25:06 +01:00
qemu-option.c qemu-img: Suppress unhelpful extra errors in convert, amend 2015-02-26 14:51:21 +01:00
qemu-progress.c qemu-progress: Fix progress printing on SIGUSR1 2014-01-24 14:33:00 +01:00
qemu-sockets.c qemu-sockets: Simplify setting numeric and boolean options 2015-02-26 14:51:53 +01:00
qemu-thread-posix.c qemu-thread: do not use PTHREAD_MUTEX_ERRORCHECK 2015-03-10 10:49:25 +01:00
qemu-thread-win32.c qemu-thread: add per-thread atexit functions 2015-01-13 13:43:29 +00:00
qemu-timer-common.c Allow clock_gettime() monotonic clock to be utilized on more OS's 2013-04-04 20:22:45 -05:00
rcu.c rcu: do not create thread in pthread_atfork callback 2015-04-01 10:06:38 +02:00
readline.c readline: Clear screen on form feed. 2014-06-11 10:10:29 -04:00
rfifolock.c rfifolock: add recursive FIFO lock 2014-03-13 14:42:21 +01:00
throttle.c throttle: add throttle_detach/attach_aio_context() 2014-06-04 09:56:12 +02:00
unicode.c unicode: New mod_utf8_codepoint() 2013-04-13 19:39:59 +00:00
uri.c util/uri: Add overflow check to rfc3986_parse_port 2015-03-18 12:05:31 +01:00