qemu-e2k/util
Fangrui Song 25f74087c6 util/cutils: Fix incorrect integer->float conversion caught by clang
Clang does not like do_strtosz()'s code to guard against overflow:

    qemu/util/cutils.c:245:23: error: implicit conversion from 'unsigned long' to 'double' changes value from 18446744073709550592 to 18446744073709551616 [-Werror,-Wimplicit-int-float-conversion]

The warning will be enabled by default in clang 10. It is not
available for clang <= 9.

val * mul >= 0xfffffffffffffc00 is indeed wrong.  0xfffffffffffffc00
is not representable exactly as double.  It's half-way between the
representable values 0xfffffffffffff800 and 0x10000000000000000.
Which one we get is implementation-defined.  Bad.

We want val * mul > (the largest uint64_t exactly representable as
double).  That's 0xfffffffffffff800.  Write it as nextafter(0x1p64, 0)
with a suitable comment.

Signed-off-by: Fangrui Song <i@maskray.me>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Patch split, commit message improved]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20191122080039.12771-3-armbru@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
2019-11-25 06:00:05 +01:00
..
aio-posix.c
aio-wait.c
aio-win32.c
aiocb.c
async.c util/async: avoid useless cast 2019-10-24 19:26:05 +02:00
atomic64.c
base64.c
bitmap.c
bitops.c
buffer.c
bufferiszero.c
cacheinfo.c Fix cacheline detection on FreeBSD/powerpc. 2019-09-19 14:42:13 +02:00
compatfd.c
coroutine-sigaltstack.c
coroutine-ucontext.c
coroutine-win32.c
crc32c.c
cutils.c util/cutils: Fix incorrect integer->float conversion caught by clang 2019-11-25 06:00:05 +01:00
drm.c
envlist.c
error.c
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
fifo8.c Include migration/vmstate.h less 2019-08-16 13:31:52 +02:00
filemonitor-inotify.c
filemonitor-stub.c
getauxval.c
guest-random.c
hbitmap.c hbitmap: handle set/reset with zero length 2019-10-28 11:22:30 +01:00
hexdump.c
host-utils.c
id.c
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
keyval.c
lockcnt.c
log.c plugin: add qemu_plugin_outs helper 2019-10-28 15:12:38 +00:00
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: introduce SharedResource 2019-10-28 11:22:31 +01:00
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: return success on module load 2019-08-21 16:29:57 +02:00
notify.c xen / notify: introduce a new XenWatchList abstraction 2019-09-24 12:18:47 +01:00
osdep.c
oslib-posix.c core: replace getpagesize() with qemu_real_host_page_size 2019-10-26 15:38:06 +02:00
oslib-win32.c core: replace getpagesize() with qemu_real_host_page_size 2019-10-26 15:38:06 +02:00
pagesize.c
path.c
qdist.c
qemu-co-shared-resource.c util: introduce SharedResource 2019-10-28 11:22:31 +01:00
qemu-config.c
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
qemu-coroutine-sleep.c qemu-coroutine-sleep: Silence Coverity warning 2019-11-18 16:01:34 -06:00
qemu-coroutine.c
qemu-error.c
qemu-openpty.c
qemu-option.c
qemu-print.c
qemu-progress.c
qemu-sockets.c util/qemu-sockets: fix keep_alive handling in inet_connect_saddr 2019-09-25 08:15:44 -05:00
qemu-thread-common.h
qemu-thread-posix.c qemu-thread: Add qemu_cond_timedwait 2019-09-16 17:13:06 +02:00
qemu-thread-win32.c qemu-thread: Add qemu_cond_timedwait 2019-09-16 17:13:06 +02:00
qemu-timer-common.c
qemu-timer.c qemu-timer: reuse MIN macro in qemu_timeout_ns_to_ms 2019-10-24 20:10:18 +02:00
qht.c
qsp.c qemu-thread: Add qemu_cond_timedwait 2019-09-16 17:13:06 +02:00
range.c
rcu.c
readline.c
stats64.c
sys_membarrier.c
systemd.c Do not use %m in common code to print error messages 2019-10-22 09:38:42 +02:00
thread-pool.c
throttle.c
timed-average.c
trace-events socket: Add backlog parameter to socket_listen 2019-09-03 23:24:42 +02:00
unicode.c
uri.c
uuid.c
vfio-helpers.c core: replace getpagesize() with qemu_real_host_page_size 2019-10-26 15:38:06 +02:00