nixpkgs/modules/testing/test-instrumentation.nix
Eelco Dolstra bc68c2985c * Added a function waitForX, which returns when the X server accepts
connections.
* In the root shell, source /etc/bashrc and set $HOME and $DISPLAY.  

svn path=/nixos/trunk/; revision=19247
2010-01-05 23:59:29 +00:00

66 lines
1.8 KiB
Nix

# This module allows the test driver to connect to the virtual machine
# via a root shell attached to port 514.
{ config, pkgs, ... }:
with pkgs.lib;
{
config = {
jobs.backdoor =
{ startOn = "started network-interfaces";
preStart =
''
echo "guest running" > /dev/ttyS0
echo "===UP===" > dev/ttyS0
'';
script =
''
export HOME=/root
export DISPLAY=:0.0
export GCOV_PREFIX=/tmp/coverage-data
source /etc/bashrc
cd /tmp
exec ${pkgs.socat}/bin/socat tcp-listen:514,fork exec:/bin/sh 2> /dev/ttyS0
'';
};
boot.postBootCommands =
''
# Panic on out-of-memory conditions rather than letting the
# OOM killer randomly get rid of processes, since this leads
# to failures that are hard to diagnose.
echo 2 > /proc/sys/vm/panic_on_oom
# Coverage data is written into /tmp/coverage-data. Symlink
# it to the host filesystem so that we don't need to copy it
# on shutdown.
( eval $(cat /proc/cmdline)
mkdir /hostfs/$hostTmpDir/coverage-data
ln -s /hostfs/$hostTmpDir/coverage-data /tmp/coverage-data
)
# Mount debugfs to gain access to the kernel coverage data (if
# available).
mount -t debugfs none /sys/kernel/debug || true
'';
# If the kernel has been built with coverage instrumentation, make
# it available under /proc/gcov.
boot.kernelModules = [ "gcov-proc" ];
# Panic if an error occurs in stage 1 (rather than waiting for
# user intervention).
boot.kernelParams = [ "stage1panic" ];
# `xwininfo' is used by the test driver to query open windows.
environment.systemPackages = [ pkgs.xorg.xwininfo ];
};
}