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qemu/tests/qtest
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Alexander Bulekov fc69fa216c fuzz: Disable QEMU's SIG{INT,HUP,TERM} handlers 
Prior to this patch, the only way I found to terminate the fuzzer was
either to:
 1. Explicitly specify the number of fuzzer runs with the -runs= flag
 2. SIGKILL the process with "pkill -9 qemu-fuzz-*" or similar

In addition to being annoying to deal with, SIGKILLing the process skips
over any exit handlers(e.g. registered with atexit()). This is bad,
since some fuzzers might create temporary files that should ideally be
removed on exit using an exit handler. The only way to achieve a clean
exit now is to specify -runs=N , but the desired "N" is tricky to
identify prior to fuzzing.

Why doesn't the process exit with standard SIGINT,SIGHUP,SIGTERM
signals? QEMU installs its own handlers for these signals in
os-posix.c:os_setup_signal_handling, which notify the main loop that an
exit was requested. The fuzzer, however, does not run qemu_main_loop,
which performs the main_loop_should_exit() check.  This means that the
fuzzer effectively ignores these signals. As we don't really care about
cleanly stopping the disposable fuzzer "VM", this patch uninstalls
QEMU's signal handlers. Thus, we can stop the fuzzer with
SIG{INT,HUP,TERM} and the fuzzing code can optionally use atexit() to
clean up temporary files/resources.

Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Message-Id: <20201014142157.46028-1-alxndr@bu.edu>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-17 10:45:53 -04:00
..
fuzz fuzz: Disable QEMU's SIG{INT,HUP,TERM} handlers 2020-10-17 10:45:53 -04:00
libqos qtest: remove qtest_qmp_receive_success 2020-10-12 11:50:49 -04:00
ac97-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
acpi-utils.c
acpi-utils.h meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
ahci-test.c qtest: switch users back to qtest_qmp_receive 2020-10-12 11:50:49 -04:00
arm-cpu-features.c hw/arm/virt: Implement kvm-steal-time 2020-10-08 15:24:32 +01:00
bios-tables-test-allowed-diff.h tests/acpi: update expected data files 2020-09-30 11:29:56 +02:00
bios-tables-test.c Add a comment in bios-tables-test.c to clarify the reason behind approach 2020-10-13 12:48:17 +02:00
boot-order-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
boot-sector.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
boot-sector.h meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
boot-serial-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
cdrom-test.c tests/qtest/cdrom: Add more s390x-related boot tests 2020-10-06 20:14:48 +02:00
cpu-plug-test.c cphp: remove deprecated cpu-add command(s) 2020-09-29 02:14:30 -04:00
dbus-vmstate1.xml
dbus-vmstate-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
device-introspect-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
device-plug-test.c device-plug-test: use qtest_qmp to send the device_del command 2020-10-12 11:50:49 -04:00
display-vga-test.c
drive_del-test.c qemu-iotests, qtest: rewrite test 067 as a qtest 2020-10-12 11:50:50 -04:00
ds1338-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
e1000-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
e1000e-test.c tests/qtest: Fix LGPL information in the file headers 2020-06-15 18:26:46 +02:00
eepro100-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
endianness-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
es1370-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
fdc-test.c
fuzz-test.c qtest: add fuzz test case 2020-10-13 08:08:55 +02:00
fw_cfg-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
hd-geo-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
hexloader-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
i440fx-test.c
i82801b11-test.c
ide-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
intel-hda-test.c
ioh3420-test.c
ipmi-bt-test.c
ipmi-kcs-test.c tests/qtest/ipmi-kcs: Fix assert side-effect 2020-09-03 12:47:33 +02:00
ipoctal232-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
ivshmem-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
libqtest-single.h meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
libqtest.c qtest: switch users back to qtest_qmp_receive 2020-10-12 11:50:49 -04:00
m25p80-test.c
m48t59-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
machine-none-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
megasas-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
meson.build * qtest improvements (test for crash found with the fuzzer, increase 2020-10-13 12:46:26 +01:00
microbit-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
migration-helpers.c qtest: remove qtest_qmp_receive_success 2020-10-12 11:50:49 -04:00
migration-helpers.h meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
migration-test.c tests/migration: Allow longer timeouts 2020-10-13 08:08:55 +02:00
modules-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
ne2000-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
numa-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
nvme-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
pca9552-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
pci-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
pcnet-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
pflash-cfi02-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
pnv-xscom-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
prom-env-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
pvpanic-test.c qtest: switch users back to qtest_qmp_receive 2020-10-12 11:50:49 -04:00
pxe-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
q35-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
qmp-cmd-test.c tests/qtest/qmp-cmd-test: Use inclusive language 2020-09-16 08:41:06 +02:00
qmp-test.c qtest: rename qtest_qmp_receive to qtest_qmp_receive_dict 2020-10-12 11:50:24 -04:00
qom-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
qos-test.c tests/qtest: Fix LGPL information in the file headers 2020-06-15 18:26:46 +02:00
rtas-test.c meson: link emulators without Makefile.target 2020-08-21 06:30:40 -04:00
rtc-test.c tests/qtest: Replace magic value by NANOSECONDS_PER_SECOND definition 2020-10-13 08:08:55 +02:00
rtl8139-test.c
sdhci-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
spapr-phb-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
tco-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
test-arm-mptimer.c
test-filter-mirror.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
test-filter-redirector.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
test-hmp.c cphp: remove deprecated cpu-add command(s) 2020-09-29 02:14:30 -04:00
test-netfilter.c
test-x86-cpuid-compat.c i386: Mask SVM features if nested SVM is disabled 2020-06-26 09:39:40 -04:00
tmp105-test.c
tpm-crb-swtpm-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
tpm-crb-test.c test: tpm-tis: Get prepared to share tests between ISA and sysbus devices 2020-03-05 12:18:39 -05:00
tpm-emu.c tpm: Move backend code under the 'backends/' directory 2020-06-19 07:25:55 -04:00
tpm-emu.h test/tpm-emu: include sockets and channel headers in tpm-emu header 2020-06-09 14:18:04 -04:00
tpm-tests.c tests/qtest/tpm: Declare input buffers const and static 2020-09-03 12:47:33 +02:00
tpm-tests.h test: tpm: pass optional machine options to swtpm test functions 2020-03-05 12:18:33 -05:00
tpm-tis-device-swtpm-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
tpm-tis-device-test.c test: tpm-tis: Add Sysbus TPM-TIS device test 2020-03-05 12:18:47 -05:00
tpm-tis-swtpm-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
tpm-tis-test.c test: tpm-tis: Get prepared to share tests between ISA and sysbus devices 2020-03-05 12:18:39 -05:00
tpm-tis-util.c test: tpm-tis: Get prepared to share tests between ISA and sysbus devices 2020-03-05 12:18:39 -05:00
tpm-tis-util.h test: tpm-tis: Get prepared to share tests between ISA and sysbus devices 2020-03-05 12:18:39 -05:00
tpm-util.c qtest: switch users back to qtest_qmp_receive 2020-10-12 11:50:49 -04:00
tpm-util.h test: tpm-tis: Get prepared to share tests between ISA and sysbus devices 2020-03-05 12:18:39 -05:00
tulip-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
usb-hcd-ehci-test.c libqos: usb-hcd-ehci: use 32-bit write for config register 2020-06-26 06:45:29 -04:00
usb-hcd-ohci-test.c
usb-hcd-uhci-test.c
usb-hcd-xhci-test.c
vhost-user-test.c tests/qtest/vhost-user-test: prepare the tests for adding new dev class 2020-09-29 02:14:29 -04:00
virtio-9p-test.c tests/virtio-9p: added split readdir tests 2020-08-12 09:17:32 +02:00
virtio-blk-test.c
virtio-ccw-test.c
virtio-net-test.c
virtio-rng-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
virtio-scsi-test.c
virtio-serial-test.c
virtio-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
vmgenid-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
vmxnet3-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00
wdt_ib700-test.c meson: convert tests/qtest to meson 2020-08-21 06:30:20 -04:00