tests/regression/ust/daemon/test_daemon.py

   1 #!/usr/bin/env python3
   2 #
   3 # Copyright (C) - 2013 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   4 #
   5 # This program is free software; you can redistribute it and/or modify it
   6 # under the terms of the GNU General Public License, version 2 only, as
   7 # published by the Free Software Foundation.
   8 #
   9 # This program is distributed in the hope that it will be useful, but WITHOUT
  10 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11 # FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12 # more details.
  13 #
  14 # You should have received a copy of the GNU General Public License along with
  15 # this program; if not, write to the Free Software Foundation, Inc., 51
  16 # Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17
  18 import uuid
  19 import os
  20 import subprocess
  21 import re
  22 import shutil
  23 import sys
  24
  25 test_path = os.path.dirname(os.path.abspath(__file__)) + "/"
  26 test_utils_path = test_path
  27 for i in range(4):
  28     test_utils_path = os.path.dirname(test_utils_path)
  29 test_utils_path = test_utils_path + "/utils"
  30 sys.path.append(test_utils_path)
  31 from test_utils import *
  32
  33
  34 NR_TESTS = 6
  35 current_test = 1
  36 print("1..{0}".format(NR_TESTS))
  37
  38 # Check if a sessiond is running... bail out if none found.
  39 if session_daemon_alive() == 0:
  40     bail("No sessiond running. Please make sure you are running this test with the \"run\" shell script and verify that the lttng tools are properly installed.")
  41
  42 session_info = create_session()
  43 enable_ust_tracepoint_event(session_info, "*")
  44 start_session(session_info)
  45
  46
  47 parent_pid = None
  48 daemon_pid = None
  49 daemon_process = subprocess.Popen(test_path + "daemon", stdout=subprocess.PIPE)
  50 for line in daemon_process.stdout:
  51     name, pid = line.decode('utf-8').split()
  52     if name == "child_pid":
  53         daemon_pid = int(pid)
  54     if name == "parent_pid":
  55         parent_pid = int(pid)
  56
  57 daemon_process_return_code = daemon_process.wait()
  58
  59 if parent_pid is None or daemon_pid is None:
  60     bail("Unexpected output received from daemon test executable." + str(daemon_process_output))
  61
  62 print_test_result(daemon_process_return_code == 0, current_test, "Successful call to daemon() and normal exit")
  63 current_test += 1
  64
  65 if daemon_process_return_code != 0:
  66     bail("Could not trigger tracepoints successfully. Abandoning test.")
  67
  68 stop_session(session_info)
  69
  70 try:
  71     babeltrace_process = subprocess.Popen(["babeltrace", session_info.trace_path], stdout=subprocess.PIPE)
  72 except FileNotFoundError:
  73     bail("Could not open babeltrace. Please make sure it is installed.")
  74
  75 before_daemon_event_found = False
  76 before_daemon_event_pid = -1
  77 after_daemon_event_found = False
  78 after_daemon_event_pid = -1
  79
  80 for event_line in babeltrace_process.stdout:
  81     event_line = event_line.decode('utf-8').replace("\n", "")
  82
  83     if re.search(r"before_daemon", event_line) is not None:
  84         if before_daemon_event_found:
  85             bail("Multiple instances of the before_daemon event found. Please make sure only one instance of this test is runnning.")
  86         before_daemon_event_found = True
  87         match = re.search(r"(?<=pid = )\d+", event_line)
  88
  89         if match is not None:
  90             before_daemon_event_pid = int(match.group(0))
  91
  92     if re.search(r"after_daemon", event_line) is not None:
  93         if after_daemon_event_found:
  94             bail("Multiple instances of the after_daemon event found. Please make sure only one instance of this test is runnning.")
  95         after_daemon_event_found = True
  96         match = re.search(r"(?<=pid = )\d+", event_line)
  97
  98         if match is not None:
  99             after_daemon_event_pid = int(match.group(0))
 100 babeltrace_process.wait()
 101
 102 print_test_result(babeltrace_process.returncode == 0, current_test, "Resulting trace is readable")
 103 current_test += 1
 104
 105 if babeltrace_process.returncode != 0:
 106     bail("Unreadable trace; can't proceed with analysis.")
 107
 108 print_test_result(before_daemon_event_found, current_test, "before_daemon event found in resulting trace")
 109 current_test += 1
 110 print_test_result(before_daemon_event_pid == parent_pid, current_test, "Parent pid reported in trace is correct")
 111 current_test += 1
 112 print_test_result(before_daemon_event_found, current_test, "after_daemon event found in resulting trace")
 113 current_test += 1
 114 print_test_result(after_daemon_event_pid == daemon_pid, current_test, "Daemon pid reported in trace is correct")
 115 current_test += 1
 116
 117 shutil.rmtree(session_info.tmp_directory)