kumquat-buildroot/support/testing/infra/emulator.py
Ricardo Martincoski 9bb306bd64 support/testing: large timeout for login prompt
When running multiple instances of emulator in parallel, the login
prompt can take some time to appear.

Use a large timeout when waiting for the prompt to avoid random
failures.

Signed-off-by: Ricardo Martincoski <ricardo.martincoski@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2017-07-01 16:05:14 +02:00

112 lines
3.9 KiB
Python

import pexpect
import infra
class Emulator(object):
def __init__(self, builddir, downloaddir, logtofile):
self.qemu = None
self.downloaddir = downloaddir
self.logfile = infra.open_log_file(builddir, "run", logtofile)
# Start Qemu to boot the system
#
# arch: Qemu architecture to use
#
# kernel: path to the kernel image, or the special string
# 'builtin'. 'builtin' means a pre-built kernel image will be
# downloaded from ARTEFACTS_URL and suitable options are
# automatically passed to qemu and added to the kernel cmdline. So
# far only armv5, armv7 and i386 builtin kernels are available.
# If None, then no kernel is used, and we assume a bootable device
# will be specified.
#
# kernel_cmdline: array of kernel arguments to pass to Qemu -append option
#
# options: array of command line options to pass to Qemu
#
def boot(self, arch, kernel=None, kernel_cmdline=None, options=None):
if arch in ["armv7", "armv5"]:
qemu_arch = "arm"
else:
qemu_arch = arch
qemu_cmd = ["qemu-system-{}".format(qemu_arch),
"-serial", "stdio",
"-display", "none"]
if options:
qemu_cmd += options
if kernel_cmdline is None:
kernel_cmdline = []
if kernel:
if kernel == "builtin":
if arch in ["armv7", "armv5"]:
kernel_cmdline.append("console=ttyAMA0")
if arch == "armv7":
kernel = infra.download(self.downloaddir,
"kernel-vexpress")
dtb = infra.download(self.downloaddir,
"vexpress-v2p-ca9.dtb")
qemu_cmd += ["-dtb", dtb]
qemu_cmd += ["-M", "vexpress-a9"]
elif arch == "armv5":
kernel = infra.download(self.downloaddir,
"kernel-versatile")
qemu_cmd += ["-M", "versatilepb"]
qemu_cmd += ["-kernel", kernel]
if kernel_cmdline:
qemu_cmd += ["-append", " ".join(kernel_cmdline)]
self.logfile.write("> starting qemu with '%s'\n" % " ".join(qemu_cmd))
self.qemu = pexpect.spawn(qemu_cmd[0], qemu_cmd[1:], timeout=5)
# We want only stdout into the log to avoid double echo
self.qemu.logfile_read = self.logfile
# Wait for the login prompt to appear, and then login as root with
# the provided password, or no password if not specified.
def login(self, password=None):
# The login prompt can take some time to appear when running multiple
# instances in parallel, so set the timeout to a large value
index = self.qemu.expect(["buildroot login:", pexpect.TIMEOUT],
timeout=60)
if index != 0:
self.logfile.write("==> System does not boot")
raise SystemError("System does not boot")
self.qemu.sendline("root")
if password:
self.qemu.expect("Password:")
self.qemu.sendline(password)
index = self.qemu.expect(["# ", pexpect.TIMEOUT])
if index != 0:
raise SystemError("Cannot login")
self.run("dmesg -n 1")
# Run the given 'cmd' on the target
# return a tuple (output, exit_code)
def run(self, cmd):
self.qemu.sendline(cmd)
self.qemu.expect("# ")
# Remove double carriage return from qemu stdout so str.splitlines()
# works as expected.
output = self.qemu.before.replace("\r\r", "\r").splitlines()[1:]
self.qemu.sendline("echo $?")
self.qemu.expect("# ")
exit_code = self.qemu.before.splitlines()[2]
exit_code = int(exit_code)
return output, exit_code
def stop(self):
if self.qemu is None:
return
self.qemu.terminate(force=True)