Paolo Bonzini 158ef8cbb7 qemu-thread: fix qemu_event without futexes ... This had a possible deadlock that was visible with rcutorture. qemu_event_set qemu_event_wait ---------------------------------------------------------------- cmpxchg reads FREE, writes BUSY futex_wait: pthread_mutex_lock futex_wait: value == BUSY xchg reads BUSY, writes SET futex_wake: pthread_cond_broadcast futex_wait: pthread_cond_wait <deadlock> The fix is simply to avoid condvar tricks and do the obvious locking around pthread_cond_broadcast: qemu_event_set qemu_event_wait ---------------------------------------------------------------- cmpxchg reads FREE, writes BUSY futex_wait: pthread_mutex_lock futex_wait: value == BUSY xchg reads BUSY, writes SET futex_wake: pthread_mutex_lock (blocks) futex_wait: pthread_cond_wait (mutex unlocked) futex_wake: pthread_cond_broadcast futex_wake: pthread_mutex_unlock futex_wait: pthread_mutex_unlock Cc: qemu-stable@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2015-02-02 16:55:09 +01:00
..
acl.c	acl: fix memory leak	2014-11-17 11:48:56 +01:00
aes.c	util: Add InvMixColumns	2014-06-16 13:24:33 +02:00
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: tighten qemu_parse_fd()	2014-05-08 14:19:58 -04:00
envlist.c	util: Fix compilation of envlist.c for MinGW	2013-02-02 20:13:19 +00:00
error.c	error: error_is_set() is finally unused; remove	2014-05-21 11:57:58 +02:00
event_notifier-posix.c	sysemu: avoid proliferation of include/ subdirectories	2013-04-15 18:19:25 +02:00
event_notifier-win32.c	build: move libqemuutil.a components to util/	2013-01-12 18:42:50 +01:00
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	util: Emancipate id_wellformed() from QemuOpts	2014-10-03 10:30:33 +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	memory: expose alignment used for allocating RAM as MemoryRegion API	2014-11-23 12:11:30 +02:00
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	qapi: output def_value_str when query command line options	2014-06-16 17:23:20 +08:00
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	block: Don't add trailing space in "Formating..." message	2014-12-12 16:52:33 +00:00
qemu-progress.c	qemu-progress: Fix progress printing on SIGUSR1	2014-01-24 14:33:00 +01:00
qemu-sockets.c	qemu-sockets: Add error to non-blocking connect handler	2014-10-09 15:36:15 +02:00
qemu-thread-posix.c	qemu-thread: fix qemu_event without futexes	2015-02-02 16:55:09 +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
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: Fuse g_malloc(); memset() into g_new0()	2014-12-10 11:33:38 +03:00