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xemu/include/qemu
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Robert Foley 7606488c0e Add use of RCU for qemu_logfile. 
This now allows changing the logfile while logging is active,
and also solves the issue of a seg fault while changing the logfile.

Any read access to the qemu_logfile handle will use
the rcu_read_lock()/unlock() around the use of the handle.
To fetch the handle we will use atomic_rcu_read().
We also in many cases do a check for validity of the
logfile handle before using it to deal with the case where the
file is closed and set to NULL.

The cases where we write to the qemu_logfile will use atomic_rcu_set().
Writers will also use call_rcu() with a newly added qemu_logfile_free
function for freeing/closing when readers have finished.

Signed-off-by: Robert Foley <robert.foley@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20191118211528.3221-6-robert.foley@linaro.org>
 		2019-12-18 20:18:02 +00:00
..
atomic.h include/qemu/atomic.h: Add signal_barrier 2019-07-14 12:19:00 +02:00
atomic128.h include: Make headers more self-contained 2019-08-16 13:31:51 +02:00
base64.h Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
bcd.h Clean up decorations and whitespace around header guards 2016-07-12 16:20:46 +02:00
bitmap.h bitmap: Add bitmap_copy_with_{src|dst}_offset() 2019-07-15 15:39:02 +02:00
bitops.h target/arm/cpu64: max cpu: Introduce sve<N> properties 2019-11-01 20:40:59 +00:00
bswap.h include/qemu/bswap.h: Use __builtin_memcpy() in accessor functions 2019-04-09 18:34:21 +02:00
buffer.h Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
co-shared-resource.h util: introduce SharedResource 2019-10-28 11:22:31 +01:00
compiler.h include: Move endof() up from hw/virtio/virtio.h 2019-10-28 11:51:07 +01:00
config-file.h Move include qemu/option.h from qemu-common.h to actual users 2018-02-09 13:52:16 +01:00
coroutine.h coroutine: Add qemu_co_mutex_assert_locked() 2019-10-25 15:18:38 +02:00
coroutine_int.h coroutine: avoid co_queue_wakeup recursion 2018-03-27 13:05:28 +01:00
cpuid.h util: Introduce include/qemu/cpuid.h 2017-07-24 12:42:55 +01:00
crc32c.h Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
ctype.h qemu-common: Move qemu_isalnum() etc. to qemu/ctype.h 2019-06-11 20:22:09 +02:00
cutils.h Memory: Enable writeback for given memory region 2019-12-16 10:46:35 +00:00
drm.h Clean up ill-advised or unusual header guards 2019-05-13 08:58:55 +02:00
envlist.h misc: move include files to include/qemu/ 2012-12-19 08:32:39 +01:00
error-report.h monitor error: Make printf()-like functions return a value 2019-04-18 22:18:59 +02:00
event_notifier.h Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
fifo8.h Include migration/vmstate.h less 2019-08-16 13:31:52 +02:00
fifo32.h hw: Clean up includes 2016-06-07 18:19:23 +03:00
filemonitor.h Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
futex.h futex: add missing header guards 2017-10-16 20:57:13 +03:00
guest-random.h util: Add qemu_guest_getrandom and associated routines 2019-05-22 12:38:54 -04:00
hbitmap.h util/hbitmap: strict hbitmap_reset 2019-10-17 17:02:32 -04:00
help_option.h Clean up decorations and whitespace around header guards 2016-07-12 16:20:46 +02:00
host-utils.h includes: Replace QEMU_GNUC_PREREQ with "__has_builtin || !defined(__clang__)" 2018-12-12 10:01:13 +01:00
id.h Clean up decorations and whitespace around header guards 2016-07-12 16:20:46 +02:00
int128.h tcg: Add atomic128 helpers 2016-10-26 08:29:01 -07:00
iov.h block/qcow2: implement .bdrv_co_pwritev(_compressed)_part 2019-08-27 14:58:42 +01:00
iova-tree.h util: remove redundant include of glib.h and add osdep.h 2018-06-29 12:22:28 +01:00
jhash.h Clean up ill-advised or unusual header guards 2019-05-13 08:58:55 +02:00
job.h job: drop job_drain 2019-09-10 08:58:43 +02:00
lockable.h lockable: workaround GCC link issue with ASAN 2018-03-06 14:01:27 +01:00
log-for-trace.h log-for-trace.h: Split out parts of log.h used by trace.h 2018-03-12 11:10:20 +00:00
log.h Add use of RCU for qemu_logfile. 2019-12-18 20:18:02 +00:00
main-loop.h slirp: replace global polling with per-instance & notifier 2019-02-07 15:49:08 +02:00
memfd.h linux-user: add memfd_create 2019-09-11 08:46:17 +02:00
mmap-alloc.h Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
module.h module: return success on module load 2019-08-21 16:29:57 +02:00
notify.h xen / notify: introduce a new XenWatchList abstraction 2019-09-24 12:18:47 +01:00
option.h option: Make option help nicer to read 2018-11-05 15:17:48 +01:00
option_int.h qemu/queue.h: simplify reverse access to QTAILQ 2019-01-11 15:46:55 +01:00
osdep.h core: replace getpagesize() with qemu_real_host_page_size 2019-10-26 15:38:06 +02:00
path.h Clean up decorations and whitespace around header guards 2016-07-12 16:20:46 +02:00
plugin-memory.h plugins: implement helpers for resolving hwaddr 2019-10-28 15:12:38 +00:00
plugin.h plugin: add core code 2019-10-28 15:12:38 +00:00
pmem.h Clean up decorations and whitespace around header guards 2019-05-13 08:58:55 +02:00
processor.h Drop remaining bits of ia64 host support 2018-02-05 18:09:45 +01:00
qdist.h Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
qemu-plugin.h tcg plugins: expose an API version concept 2019-11-12 14:32:55 +00:00
qemu-print.h qemu-print: New qemu_fprintf(), qemu_vfprintf() 2019-04-18 22:18:59 +02:00
qht.h qht: constify qht_statistics_init 2018-09-26 08:55:54 -07:00
qsp.h qsp: Simplify how qsp_report() prints 2019-04-18 22:18:59 +02:00
queue.h queue: add QTAILQ_REMOVE_SEVERAL 2019-10-28 15:12:38 +00:00
range.h Include qemu/queue.h slightly less 2019-08-16 13:31:52 +02:00
ratelimit.h include: Make headers more self-contained 2019-08-16 13:31:51 +02:00
rcu.h rcu: Add automatically released rcu_read_lock variants 2019-10-11 14:19:49 +01:00
rcu_queue.h qemu/queue.h: reimplement QTAILQ without pointer-to-pointers 2019-01-11 15:46:55 +01:00
readline.h readline: add a free function 2018-01-16 14:54:50 +01:00
seqlock.h seqlock: add QemuLockable support 2018-08-23 18:46:25 +02:00
sockets.h socket: Add backlog parameter to socket_listen 2019-09-03 23:24:42 +02:00
stats64.h Normalize header guard symbol definition. 2019-05-13 08:58:55 +02:00
sys_membarrier.h Normalize header guard symbol definition. 2019-05-13 08:58:55 +02:00
systemd.h Normalize header guard symbol definition. 2019-05-13 08:58:55 +02:00
thread-posix.h qsp: QEMU's Synchronization Profiler 2018-08-23 18:46:25 +02:00
thread-win32.h include: Make headers more self-contained 2019-08-16 13:31:51 +02:00
thread.h qemu-thread: Add qemu_cond_timedwait 2019-09-16 17:13:06 +02:00
throttle-options.h block: add throttle block filter driver 2017-09-06 10:12:02 +02:00
throttle.h Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
timed-average.h include: Clean up includes 2016-02-23 12:43:05 +00:00
timer.h util/qemu-timer: refactor deadline calculation for external timers 2019-08-20 17:26:21 +02:00
typedefs.h sysemu: Move the VMChangeStateEntry typedef to qemu/typedefs.h 2019-08-16 13:31:53 +02:00
unicode.h json: Reject invalid UTF-8 sequences 2018-08-24 20:26:37 +02:00
units.h block: Eliminate the S_1KiB, S_2KiB, ... macros 2019-02-01 13:46:45 +01:00
uri.h Remove unused function declarations 2016-09-15 15:32:22 +03:00
uuid.h Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
vfio-helpers.h Clean up includes 2018-12-20 10:29:08 +01:00
win_dump_defs.h dump: move Windows dump structures definitions 2018-10-02 19:09:12 +02:00
xattr.h include: Fix typos found by codespell 2017-01-24 23:26:52 +03:00
xxhash.h xxhash: match output against the original xxhash32 2018-12-17 06:04:44 +03:00