As reported by a gitlab runtime test [1] and on the mailing list
[2], some runtime tests are failing on slow host machines when
the qemu-system-<arch> is missing on the host.
The boot-qemu-image.py script need to wait some time after
calling pexpect.spawn() in order to make sure that the qemu
process has been executed in start-qemu.sh.
If start-qemu.sh failed due to missing qemu-system binary
an exception will be thrown by child.expect() and should be
catched by the error handling (pexpect.EOF).
After spending a lot of time to investigate with Yann E. MORIN
[3]. It seems that short-lived child processes are a corner-case
that is not very correctly handled...
Without adding a sleep(1), child.expect() can trigger an
exception before setting the exitstatus of the spawned
process. This issue can be reproduced on a gitlab runner or
by adding "exit 1" in the first line of start-qemu.sh
(after the shebang).
There is even the same workaround in some pexpect examples [4].
Thanks to Yann for the help while investigating the issue.
Tested:
https://gitlab.com/kubu93/buildroot/pipelines/138472925
[1] https://gitlab.com/kubu93/buildroot/pipelines/135487475
[2] http://lists.busybox.net/pipermail/buildroot/2020-April/280037.html
[3] http://patchwork.ozlabs.org/project/buildroot/patch/20200418161023.1221799-1-romain.naour@gmail.com/
[4] https://github.com/pexpect/pexpect/blob/master/examples/ssh_tunnel.py#L80
Fixes:
https://gitlab.com/kubu93/buildroot/-/jobs/509053135
Signed-off-by: Romain Naour <romain.naour@gmail.com>
Cc: Yann E. MORIN <yann.morin.1998@free.fr>
[yann.morin.1998@free.fr: reorder imports]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
This script is intended to be used by gitlab CI to test at runtime Qemu
images generated by Buildroot's Qemu defconfigs.
This allows to troubleshoot different issues that may be associated with
defective builds by lanching a qemu machine, sending root password,
waiting for login shell and then perform a shutdown.
This script is inspired by toolchain builder [1] and the Buildroot
testing infrastructure.
The gitlab CI will call this script for each defconfig build but only
Qemu defconfig will be runtime tested, all others defconfig are ignored.
Some Qemu defconfig must be used with a specific Qemu version (fork)
that is not always available, so the script doesn't error out when it
can't spawn a missing command. That condition is anyway printed in the
log.
Finally, the script start Qemu like it's done for the Buildroot
testing infrastructure (using pexpect).
Note:
We noticed some timeout issues with pexpect when the Qemu machine is
powered off. That's because Qemu process doesn't stop even if the
system is halted (after "System halted"). So the script doesn't error
out when such timeout occure. The behaviour depends on the architecture
emulated by Qemu.
[1] https://github.com/bootlin/toolchains-builder/blob/master/build.sh
Signed-off-by: Jugurtha BELKALEM <jugurtha.belkalem@smile.fr>
Signed-off-by: Romain Naour <romain.naour@smile.fr>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
