Commit Graph

10 Commits

Author SHA1 Message Date
Omar Sandoval
1631c11f37 Migrate to GitHub Actions
Travis CI is no longer offering free open source CI, so migrate to
GitHub Actions. The only downside is that GitHub Actions doesn't support
nested virtualization, but we can work around that by falling back to
slow emulation.

Signed-off-by: Omar Sandoval <osandov@osandov.com>
2021-01-01 02:59:50 -08:00
Omar Sandoval
4431b4f918 vmtest: enable kernel modules
We currently build with CONFIG_MODULES=n for simplicity. However, this
means that we don't test kernel module support at all. Let's enable
module support. This requires changing how we distribute kernels. Now,
the /lib/modules/$(uname -r) directory (including the vmlinux and
vmlinuz) is bundled up as a tarball. We extract it, then mount it with
VirtFS, and do some extra setup for device nodes. (We lose the ability
to run kernel builds directly, but I've never actually used that
functionality.)

Signed-off-by: Omar Sandoval <osandov@osandov.com>
2020-10-18 01:13:01 -07:00
Omar Sandoval
de98b40495 vmtest: use pathlib
pathlib is a bit nicer than os.path for most cases, so try it out
starting with vmtest.

Signed-off-by: Omar Sandoval <osandov@osandov.com>
2020-10-14 11:37:31 -07:00
Omar Sandoval
d829401e5f vmtest: also disable onoatimehack on QEMU 5.0.1
The fix was backported to QEMU's 5.0 stable branch and released in
5.0.1.

Signed-off-by: Omar Sandoval <osandov@osandov.com>
2020-09-23 16:42:15 -07:00
Omar Sandoval
7fb196cfbf vmtest: don't use onoatimehack on QEMU 5.1.0
As of QEMU commit a5804fcf7b22 ("9pfs: local: ignore O_NOATIME if we
don't have permissions") (in v5.1.0), QEMU handles O_NOATIME sanely, so
we don't need the LD_PRELOAD hack. Since we're adding a version check,
make the multidevs check based on the version, too.

Signed-off-by: Omar Sandoval <osandov@osandov.com>
2020-08-20 17:55:57 -07:00
Omar Sandoval
4e770fb18a Format imports with isort
Signed-off-by: Omar Sandoval <osandov@osandov.com>
2020-08-20 16:55:07 -07:00
Omar Sandoval
8b264f8823 Update copyright headers to Facebook and add missing headers
drgn was originally my side project, but for awhile now it's also been
my work project. Update the copyright headers to reflect this, and add a
copyright header to various files that were missing it.
2020-05-15 15:13:02 -07:00
Omar Sandoval
e03563221d vmtest: use BusyBox shell script as init
Currently, vmtest runs a custom program as init in the guest that
communicates with the host via virtio-serial. This is a lot of C code
that turns out can be replaced with a shell script. In order to keep the
dependencies minimal, we use BusyBox.
2020-04-17 15:11:54 -07:00
Omar Sandoval
3adc8f2ffe vmtest: use -cpu host instead of kvm64
drgn may be compiled with some CPU-specific features (e.g.,
-march=native), so make sure that we support those features inside of
the VM, too.
2020-04-10 15:18:46 -07:00
Omar Sandoval
dabfe19719 Rewrite virtual machine testing setup
The current implementation of vmtest has a few issues:

1. Building drgn for each kernel version on Travis is slow, mostly
   because they don't all run in parallel.
2. For local, incremental testing, recreating the filesystem image and
   rebuilding drgn is slow, and syncing the code to the filesystem image
   is brittle.
3. The filesystem image is the only communication channel, and reading
   the exit status from the filesystem image is awkward and fragile.
4. Creating and accessing the filesystem image requires root.

This reworks vmtest to use the build on the host via VirtFS with a
simple agent on the guest that can execute arbitrary commands and return
the exit status. This has a few more moving parts but is faster and
saner overall.
2020-04-02 17:35:24 -07:00