qemu/tests
Eric Blake 42cc08d13a cutils: Improve qemu_strtosz handling of fractions
We have several limitations and bugs worth fixing; they are
inter-related enough that it is not worth splitting this patch into
smaller pieces:

* ".5k" should work to specify 512, just as "0.5k" does
* "1.9999k" and "1." + "9"*50 + "k" should both produce the same
  result of 2048 after rounding
* "1." + "0"*350 + "1B" should not be treated the same as "1.0B";
  underflow in the fraction should not be lost
* "7.99e99" and "7.99e999" look similar, but our code was doing a
  read-out-of-bounds on the latter because it was not expecting ERANGE
  due to overflow. While we document that scientific notation is not
  supported, and the previous patch actually fixed
  qemu_strtod_finite() to no longer return ERANGE overflows, it is
  easier to pre-filter than to try and determine after the fact if
  strtod() consumed more than we wanted.  Note that this is a
  low-level semantic change (when endptr is not NULL, we can now
  successfully parse with a scale of 'E' and then report trailing
  junk, instead of failing outright with EINVAL); but an earlier
  commit already argued that this is not a high-level semantic change
  since the only caller passing in a non-NULL endptr also checks that
  the tail is whitespace-only.

Fixes: https://gitlab.com/qemu-project/qemu/-/issues/1629
Fixes: cf923b78 ("utils: Improve qemu_strtosz() to have 64 bits of precision", 6.0.0)
Fixes: 7625a1ed ("utils: Use fixed-point arithmetic in qemu_strtosz", 6.0.0)
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Message-Id: <20230522190441.64278-20-eblake@redhat.com>
[eblake: tweak function comment for accuracy]
2023-06-02 12:29:27 -05:00
..
avocado tests/avocado/virtio-gpu: Cancel test if drm rendering is not available 2023-05-30 13:24:51 -07:00
bench migration/xbzrle: Use i386 host/cpuinfo.h 2023-05-23 16:51:18 -07:00
data ACPI: bios-tables-test.c step 5 (update expected table binaries) 2023-05-19 01:36:09 -04:00
decode decodetree: Add --output-null for meson testing 2023-05-31 19:56:42 -07:00
docker tests/docker: simplify HOST_ARCH definition 2023-05-26 10:17:32 +02:00
fp tests: make fp-test less chatty when running from test suite 2023-03-01 10:31:28 +00:00
guest-debug gdbstub: add test for untimely stop-reply packets 2023-05-18 12:40:52 -07:00
image-fuzzer
include
keys
lcitool tests/lcitool: Add mtools and xorriso and remove genisoimage as dependencies 2023-05-16 09:14:18 +02:00
migration meson: Add static glib dependency for initrd-stress.img 2023-05-26 12:34:17 +02:00
multiboot
perf/block/qcow2
plugin tests/plugins: add instruction matching to libinsn.so 2022-02-09 12:08:42 +00:00
qapi-schema qapi: Improve error message for description following section 2023-05-22 10:03:26 +02:00
qemu-iotests cutils: Use parse_uint in qemu_strtosz for negative rejection 2023-06-02 12:29:27 -05:00
qtest tests/qtest: Run arm-specific tests only if the required machine is available 2023-05-30 15:50:17 +01:00
rocker
tcg Hexagon (target/hexagon) Fix assignment to tmp registers 2023-05-26 07:03:41 -07:00
tsan
uefi-test-tools
unit cutils: Improve qemu_strtosz handling of fractions 2023-06-02 12:29:27 -05:00
vm Makefile: remove $(TESTS_PYTHON) 2023-05-26 10:17:32 +02:00
vmstate-static-checker-data
dbus-vmstate-daemon.sh
Makefile.include Makefile: remove $(TESTS_PYTHON) 2023-05-26 10:17:32 +02:00
meson.build tests/decode: Convert tests to meson 2023-05-30 10:55:39 -07:00
requirements.txt tests: Use configure-provided pyvenv for tests 2023-05-18 08:53:51 +02:00
test-qht-par.c
vhost-user-bridge.c error handling: Use RETRY_ON_EINTR() macro where applicable 2023-01-09 13:50:47 +01:00