Fix: test: handle env variables undefined

[lttng-tools.git] / tests / regression / ust / ust-dl / test_ust-dl.py

#!/usr/bin/env python3
#
# Copyright (C) - 2013 Jérémie Galarneau <jeremie.galarneau@efficios.com>
# Copyright (C) - 2015 Antoine Busque <abusque@efficios.com>
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License, version 2 only, as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
# more details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc., 51
# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

import os
import subprocess
import re
import shutil
import sys

test_path = os.path.dirname(os.path.abspath(__file__)) + "/"
test_utils_path = test_path
for i in range(4):
    test_utils_path = os.path.dirname(test_utils_path)
test_utils_path = test_utils_path + "/utils"
sys.path.append(test_utils_path)
from test_utils import *


NR_TESTS = 6
current_test = 1
print("1..{0}".format(NR_TESTS))

# Check if a sessiond is running... bail out if none found.
if session_daemon_alive() == 0:
    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.""")

session_info = create_session()
enable_ust_tracepoint_event(session_info, "*")
start_session(session_info)

test_env = os.environ.copy()
test_env["LD_PRELOAD"] = test_env.get("LD_PRELOAD", "") + ":liblttng-ust-dl.so"
test_env["LD_LIBRARY_PATH"] = test_env.get("LD_LIBRARY_PATH", "") + ":" + test_path
test_process = subprocess.Popen(test_path + "prog",
                                stdout=subprocess.PIPE, stderr=subprocess.PIPE,
                                env=test_env)

if sys.version_info >= (3, 3):
    try:
        test_process.wait(5)
    except subprocess.TimeoutExpired:
        test_process.kill()
        bail("Failed to run ust-dl test application.", session_info)
else:
    test_process.wait()

print_test_result(test_process.returncode == 0, current_test, "Test application exited normally")
current_test += 1

stop_session(session_info)

# Check for dl events in the resulting trace
try:
    babeltrace_process = subprocess.Popen(["babeltrace", session_info.trace_path], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
except FileNotFoundError:
    bail("Could not open babeltrace. Please make sure it is installed.", session_info)

dlopen_event_found = False
build_id_event_found = False
debug_link_event_found = False
dlclose_event_found = False

for event_line in babeltrace_process.stdout:
    # Let babeltrace finish to get the return code
    if dlopen_event_found and build_id_event_found and \
       debug_link_event_found and dlclose_event_found:
        continue

    event_line = event_line.decode('utf-8').replace("\n", "")
    if re.search(r".*lttng_ust_dl:dlopen.*", event_line) is not None:
        dlopen_event_found = True
    elif re.search(r".*lttng_ust_dl:build_id.*", event_line) is not None:
        build_id_event_found = True
    elif re.search(r".*lttng_ust_dl:debug_link.*", event_line) is not None:
        debug_link_event_found = True
    elif re.search(r".*lttng_ust_dl:dlclose.*", event_line) is not None:
        dlclose_event_found = True

babeltrace_process.wait()

print_test_result(babeltrace_process.returncode == 0, current_test, "Resulting trace is readable")
current_test += 1

print_test_result(dlopen_event_found, current_test, "lttng_ust_dl:dlopen event found in resulting trace")
current_test += 1

print_test_result(build_id_event_found, current_test, "lttng_ust_dl:build_id event found in resulting trace")
current_test += 1

print_test_result(debug_link_event_found, current_test, "lttng_ust_dl:debug_link event found in resulting trace")
current_test += 1

print_test_result(dlclose_event_found, current_test, "lttng_ust_dl:dlclose event found in resulting trace")
current_test += 1

shutil.rmtree(session_info.tmp_directory)