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ff76097ad8
qemu/util
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Daniele Buono ff76097ad8 coroutine: add check for SafeStack in sigaltstack 
Current implementation of LLVM's SafeStack is not compatible with
code that uses an alternate stack created with sigaltstack().
Since coroutine-sigaltstack relies on sigaltstack(), it is not
compatible with SafeStack. The resulting binary is incorrect, with
different coroutines sharing the same unsafe stack and producing
undefined behavior at runtime.

In the future LLVM may provide a SafeStack implementation compatible with
sigaltstack(). In the meantime, if SafeStack is desired, the coroutine
implementation from coroutine-ucontext should be used.
As a safety check, add a control in coroutine-sigaltstack to throw a
preprocessor #error if SafeStack is enabled and we are trying to
use coroutine-sigaltstack to implement coroutines.

Signed-off-by: Daniele Buono <dbuono@linux.vnet.ibm.com>
Message-id: 20200529205122.714-3-dbuono@linux.vnet.ibm.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2020-06-23 15:46:05 +01:00
..
aio-posix.c aio-posix: disable fdmon-io_uring when GSource is used 2020-05-18 18:16:00 +01:00
aio-posix.h aio-posix: remove idle poll handlers to improve scalability 2020-03-09 16:45:16 +00:00
aio-wait.c block: Use a single global AioWait 2018-09-25 15:50:15 +02:00
aio-win32.c aio-posix: disable fdmon-io_uring when GSource is used 2020-05-18 18:16:00 +01:00
aiocb.c
async.c aio-posix: disable fdmon-io_uring when GSource is used 2020-05-18 18:16:00 +01:00
atomic64.c util: add atomic64 2018-10-02 18:47:55 +02:00
base64.c
bitmap.c bitmap: Add bitmap_copy_with_{src|dst}_offset() 2019-07-15 15:39:02 +02:00
bitops.c avoid TABs in files that only contain a few 2019-01-11 15:46:56 +01:00
buffer.c
bufferiszero.c util/bufferiszero: improve avx2 accelerator 2020-04-01 14:24:03 -04:00
cacheinfo.c util/cacheinfo: fix crash when compiling with uClibc 2020-01-21 14:18:12 -10:00
compatfd.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
coroutine-sigaltstack.c coroutine: add check for SafeStack in sigaltstack 2020-06-23 15:46:05 +01:00
coroutine-ucontext.c coroutine: support SafeStack in ucontext backend 2020-06-23 15:46:05 +01:00
coroutine-win32.c
crc32c.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
cutils.c util/cutils: Turn FIXME comment into QEMU_BUILD_BUG_ON() 2019-12-18 12:26:25 +01:00
dbus.c util: add dbus helper unit 2020-01-06 18:41:32 +04:00
drm.c util: promote qemu_egl_rendernode_open() to libqemuutil 2018-08-27 10:51:44 +02:00
envlist.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
error.c error: make Error **errp const where it is appropriate 2019-12-18 08:36:16 +01:00
event_notifier-posix.c event_notifier: avoid dandling file descriptor in event_notifier_cleanup 2019-10-24 19:26:52 +02:00
event_notifier-win32.c Revert "qemu: add a cleanup callback function to EventNotifier" 2018-01-24 19:20:19 +02:00
fdmon-epoll.c aio-posix: support userspace polling of fd monitoring 2020-03-09 16:41:31 +00:00
fdmon-io_uring.c aio-posix: don't duplicate fd handler deletion in fdmon_io_uring_destroy() 2020-05-18 18:16:00 +01:00
fdmon-poll.c aio-posix: support userspace polling of fd monitoring 2020-03-09 16:41:31 +00:00
fifo8.c Include migration/vmstate.h less 2019-08-16 13:31:52 +02:00
filemonitor-inotify.c filemon: fix watch IDs to avoid potential wraparound issues 2019-04-02 13:52:02 +01:00
filemonitor-stub.c filemon: fix watch IDs to avoid potential wraparound issues 2019-04-02 13:52:02 +01:00
getauxval.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
guest-random.c replay: record and replay random number sources 2020-01-07 12:08:39 +01:00
hbitmap.c block/dirty-bitmap: improve _next_dirty_area API 2020-03-18 14:03:46 -04:00
hexdump.c
host-utils.c
id.c chardev: generate an internal id when none given 2020-01-07 16:50:09 +04:00
iov.c util/ioc.c: try to reassure Coverity about qemu_iovec_init_extended 2019-10-08 14:27:35 +01:00
iova-tree.c util: remove redundant include of glib.h and add osdep.h 2018-06-29 12:22:28 +01:00
keyval.c qobject: Replace qobject_incref/QINCREF qobject_decref/QDECREF 2018-05-04 08:27:53 +02:00
lockcnt.c
log.c lockable: replaced locks with lock guard macros where appropriate 2020-05-04 16:07:43 +01:00
main-loop.c Do not use %m in common code to print error messages 2019-10-22 09:38:42 +02:00
Makefile.objs util/Makefile: Reduce the user-mode object list 2020-06-05 21:23:22 +02:00
memfd.c linux-user: add memfd_create 2019-09-11 08:46:17 +02:00
mmap-alloc.c core: replace getpagesize() with qemu_real_host_page_size 2019-10-26 15:38:06 +02:00
module.c module: increase dirs array size by one 2020-04-13 02:56:18 -04:00
notify.c xen / notify: introduce a new XenWatchList abstraction 2019-09-24 12:18:47 +01:00
nvdimm-utils.c mem: move nvdimm_device_list to utilities 2020-02-21 09:15:03 +11:00
osdep.c util/osdep: Improve error report by calling error_setg_win32() 2020-03-09 13:36:15 +01:00
oslib-posix.c util/oslib: Returns the real thread identifier on FreeBSD and NetBSD 2020-06-10 12:10:48 -04:00
oslib-win32.c core: replace getpagesize() with qemu_real_host_page_size 2019-10-26 15:38:06 +02:00
pagesize.c util: move qemu_real_host_page_size/mask to osdep.h 2017-10-10 09:45:00 -07:00
path.c util/path: Do not cache all filenames at startup 2019-06-24 22:19:30 +02:00
qdist.c
qemu-co-shared-resource.c util: introduce SharedResource 2019-10-28 11:22:31 +01:00
qemu-config.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
qemu-coroutine-io.c yield_until_fd_readable: make it work with any AioContect 2019-10-25 14:38:29 +02:00
qemu-coroutine-lock.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
qemu-coroutine-sleep.c qemu-coroutine-sleep: Silence Coverity warning 2019-11-18 16:01:34 -06:00
qemu-coroutine.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
qemu-error.c error: Fix -msg timestamp default 2019-12-18 08:36:15 +01:00
qemu-openpty.c
qemu-option.c qemu-option: Clean up after the previous commit 2020-04-30 06:51:15 +02:00
qemu-print.c qemu-print: New qemu_fprintf(), qemu_vfprintf() 2019-04-18 22:18:59 +02:00
qemu-progress.c
qemu-sockets.c qemu-sockets: add abstract UNIX domain socket support 2020-05-20 10:34:40 +01:00
qemu-thread-common.h Clean up includes 2018-12-20 10:29:08 +01:00
qemu-thread-posix.c util: Added tsan annotate for thread name. 2020-06-16 14:49:05 +01:00
qemu-thread-win32.c qemu-thread: Add qemu_cond_timedwait 2019-09-16 17:13:06 +02:00
qemu-timer-common.c Remove support for CLOCK_MONOTONIC not being defined 2020-02-12 16:23:01 +01:00
qemu-timer.c lockable: replaced locks with lock guard macros where appropriate 2020-05-04 16:07:43 +01:00
qht.c qht: call qemu_spin_destroy for head buckets 2020-06-16 14:49:05 +01:00
qsp.c qsp: Use WITH_RCU_READ_LOCK_GUARD 2019-12-17 19:33:52 +01:00
range.c Don't talk about the LGPL if the file is licensed under the GPL 2019-01-30 10:51:20 +01:00
rcu.c lockable: replaced locks with lock guard macros where appropriate 2020-05-04 16:07:43 +01:00
readline.c qemu-common: Move qemu_isalnum() etc. to qemu/ctype.h 2019-06-11 20:22:09 +02:00
selfmap.c linux-user: factor out reading of /proc/self/maps 2020-04-07 16:19:49 +01:00
stats64.c util/stats64: Fix min/max comparisons 2017-11-15 09:34:51 +01:00
sys_membarrier.c sys_membarrier: fix up include directives 2018-04-05 14:37:38 +02:00
systemd.c tools: Fix use of fcntl(F_SETFD) during socket activation 2020-05-04 14:54:35 -05:00
thread-pool.c lockable: replaced locks with lock guard macros where appropriate 2020-05-04 16:07:43 +01:00
throttle.c throttle: Assert that bkt->max is valid in throttle_compute_wait() 2017-09-26 14:46:23 +02:00
timed-average.c
trace-events aio-posix: remove idle poll handlers to improve scalability 2020-03-09 16:45:16 +00:00
unicode.c json: Reject invalid UTF-8 sequences 2018-08-24 20:26:37 +02:00
uri.c cutils: Provide strchrnul 2018-06-29 12:32:10 +02:00
uuid.c Include qemu-common.h exactly where needed 2019-06-12 13:20:20 +02:00
vfio-helpers.c lockable: replaced locks with lock guard macros where appropriate 2020-05-04 16:07:43 +01:00