Tests: Add test to check shared-memory FD leaks after relayd dies

[lttng-tools.git] / tests / regression / ust / libc-wrapper / test_libc-wrapper.py

#!/usr/bin/env python3
#
# Copyright (C) 2013 Jérémie Galarneau <jeremie.galarneau@efficios.com>
#
# SPDX-License-Identifier: GPL-2.0-only

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 = 4
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, "lttng_ust_libc*")
start_session(session_info)

malloc_process = subprocess.Popen(
    test_path + "prog", stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL
)
malloc_process.wait()

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

stop_session(session_info)

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

malloc_event_found = False
free_event_found = False

for event_line in babeltrace_process.stdout:
    # Let babeltrace finish to get the return code
    if malloc_event_found and free_event_found:
        continue

    event_line = event_line.decode("utf-8").replace("\n", "")
    if re.search(r".*lttng_ust_libc:malloc.*", event_line) is not None:
        malloc_event_found = True

    if re.search(r".*lttng_ust_libc:free.*", event_line) is not None:
        free_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(
    malloc_event_found,
    current_test,
    "lttng_ust_libc:malloc event found in resulting trace",
)
current_test += 1

print_test_result(
    free_event_found, current_test, "lttng_ust_libc:free event found in resulting trace"
)
current_test += 1

shutil.rmtree(session_info.tmp_directory)