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# Copyright (C) 2013 Intel Corporation
#
# Released under the MIT license (see COPYING.MIT)
# This module provides a class for starting qemu images using runqemu.
# It's used by testimage.bbclass.
import subprocess
import os
import time
import signal
import re
import socket
import select
import errno
import logging
logger = logging.getLogger("BitBake.QemuRunner")
class QemuRunner:
def __init__(self, machine, rootfs, display, tmpdir, deploy_dir_image, logfile, boottime):
# Popen object for runqemu
self.runqemu = None
# pid of the qemu process that runqemu will start
self.qemupid = None
# target ip - from the command line
self.ip = None
# host ip - where qemu is running
self.server_ip = None
self.machine = machine
self.rootfs = rootfs
self.display = display
self.tmpdir = tmpdir
self.deploy_dir_image = deploy_dir_image
self.logfile = logfile
self.boottime = boottime
self.runqemutime = 60
def create_socket(self):
self.bootlog = ''
self.qemusock = None
try:
self.server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.server_socket.setblocking(0)
self.server_socket.bind(("127.0.0.1",0))
self.server_socket.listen(2)
self.serverport = self.server_socket.getsockname()[1]
logger.info("Created listening socket for qemu serial console on: 127.0.0.1:%s" % self.serverport)
return True
except socket.error, msg:
self.server_socket.close()
logger.error("Failed to create listening socket: %s" % msg[1])
return False
def log(self, msg):
if self.logfile:
with open(self.logfile, "a") as f:
f.write("%s" % msg)
def start(self, qemuparams = None):
if self.display:
os.environ["DISPLAY"] = self.display
else:
logger.error("To start qemu I need a X desktop, please set DISPLAY correctly (e.g. DISPLAY=:1)")
return False
if not os.path.exists(self.rootfs):
logger.error("Invalid rootfs %s" % self.rootfs)
return False
if not os.path.exists(self.tmpdir):
logger.error("Invalid TMPDIR path %s" % self.tmpdir)
return False
else:
os.environ["OE_TMPDIR"] = self.tmpdir
if not os.path.exists(self.deploy_dir_image):
logger.error("Invalid DEPLOY_DIR_IMAGE path %s" % self.deploy_dir_image)
return False
else:
os.environ["DEPLOY_DIR_IMAGE"] = self.deploy_dir_image
if not self.create_socket():
return False
# Set this flag so that Qemu doesn't do any grabs as SDL grabs interact
# badly with screensavers.
os.environ["QEMU_DONT_GRAB"] = "1"
self.qemuparams = 'bootparams="console=tty1 console=ttyS0,115200n8" qemuparams="-serial tcp:127.0.0.1:%s"' % self.serverport
if qemuparams:
self.qemuparams = self.qemuparams[:-1] + " " + qemuparams + " " + '\"'
launch_cmd = 'runqemu %s %s %s' % (self.machine, self.rootfs, self.qemuparams)
# FIXME: We pass in stdin=subprocess.PIPE here to work around stty
# blocking at the end of the runqemu script when using this within
# oe-selftest (this makes stty error out immediately). There ought
# to be a proper fix but this will suffice for now.
self.runqemu = subprocess.Popen(launch_cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, stdin=subprocess.PIPE, preexec_fn=os.setpgrp)
logger.info("runqemu started, pid is %s" % self.runqemu.pid)
logger.info("waiting at most %s seconds for qemu pid" % self.runqemutime)
endtime = time.time() + self.runqemutime
while not self.is_alive() and time.time() < endtime:
if self.runqemu.poll():
if self.runqemu.returncode:
# No point waiting any longer
logger.info('runqemu exited with code %d' % self.runqemu.returncode)
output = self.runqemu.stdout
self.stop()
logger.info("Output from runqemu:\n%s" % output.read())
return False
time.sleep(1)
if self.is_alive():
logger.info("qemu started - qemu procces pid is %s" % self.qemupid)
cmdline = ''
with open('/proc/%s/cmdline' % self.qemupid) as p:
cmdline = p.read()
ips = re.findall("((?:[0-9]{1,3}\.){3}[0-9]{1,3})", cmdline.split("ip=")[1])
if not ips or len(ips) != 3:
logger.info("Couldn't get ip from qemu process arguments! Here is the qemu command line used: %s" % cmdline)
self.stop()
return False
else:
self.ip = ips[0]
self.server_ip = ips[1]
logger.info("Target IP: %s" % self.ip)
logger.info("Server IP: %s" % self.server_ip)
logger.info("Waiting at most %d seconds for login banner" % self.boottime)
endtime = time.time() + self.boottime
socklist = [self.server_socket]
reachedlogin = False
stopread = False
while time.time() < endtime and not stopread:
sread, swrite, serror = select.select(socklist, [], [], 5)
for sock in sread:
if sock is self.server_socket:
self.qemusock, addr = self.server_socket.accept()
self.qemusock.setblocking(0)
socklist.append(self.qemusock)
socklist.remove(self.server_socket)
logger.info("Connection from %s:%s" % addr)
else:
data = sock.recv(1024)
if data:
self.log(data)
self.bootlog += data
if re.search(".* login:", self.bootlog):
stopread = True
reachedlogin = True
logger.info("Reached login banner")
else:
socklist.remove(sock)
sock.close()
stopread = True
if not reachedlogin:
logger.info("Target didn't reached login boot in %d seconds" % self.boottime)
lines = "\n".join(self.bootlog.splitlines()[-25:])
logger.info("Last 25 lines of text:\n%s" % lines)
logger.info("Check full boot log: %s" % self.logfile)
self.stop()
return False
else:
logger.info("Qemu pid didn't appeared in %s seconds" % self.runqemutime)
output = self.runqemu.stdout
self.stop()
logger.info("Output from runqemu:\n%s" % output.read())
return False
return self.is_alive()
def stop(self):
if self.runqemu:
logger.info("Sending SIGTERM to runqemu")
try:
os.killpg(self.runqemu.pid, signal.SIGTERM)
except OSError as e:
if e.errno != errno.ESRCH:
raise
endtime = time.time() + self.runqemutime
while self.runqemu.poll() is None and time.time() < endtime:
time.sleep(1)
if self.runqemu.poll() is None:
logger.info("Sending SIGKILL to runqemu")
os.killpg(self.runqemu.pid, signal.SIGKILL)
self.runqemu = None
if hasattr(self, 'server_socket') and self.server_socket:
self.server_socket.close()
self.server_socket = None
self.qemupid = None
self.ip = None
def restart(self, qemuparams = None):
logger.info("Restarting qemu process")
if self.runqemu.poll() is None:
self.stop()
if self.start(qemuparams):
return True
return False
def is_alive(self):
qemu_child = self.find_child(str(self.runqemu.pid))
if qemu_child:
self.qemupid = qemu_child[0]
if os.path.exists("/proc/" + str(self.qemupid)):
return True
return False
def find_child(self,parent_pid):
#
# Walk the process tree from the process specified looking for a qemu-system. Return its [pid'cmd]
#
ps = subprocess.Popen(['ps', 'axww', '-o', 'pid,ppid,command'], stdout=subprocess.PIPE).communicate()[0]
processes = ps.split('\n')
nfields = len(processes[0].split()) - 1
pids = {}
commands = {}
for row in processes[1:]:
data = row.split(None, nfields)
if len(data) != 3:
continue
if data[1] not in pids:
pids[data[1]] = []
pids[data[1]].append(data[0])
commands[data[0]] = data[2]
if parent_pid not in pids:
return []
parents = []
newparents = pids[parent_pid]
while newparents:
next = []
for p in newparents:
if p in pids:
for n in pids[p]:
if n not in parents and n not in next:
next.append(n)
if p not in parents:
parents.append(p)
newparents = next
#print "Children matching %s:" % str(parents)
for p in parents:
# Need to be careful here since runqemu-internal runs "ldd qemu-system-xxxx"
# Also, old versions of ldd (2.11) run "LD_XXXX qemu-system-xxxx"
basecmd = commands[p].split()[0]
basecmd = os.path.basename(basecmd)
if "qemu-system" in basecmd and "-serial tcp" in commands[p]:
return [int(p),commands[p]]
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