Tests: Add "fork" ust regression test

[lttng-tools.git] / tests / regression / ust / fork / test_fork.py

diff --git a/tests/regression/ust/fork/test_fork.py b/tests/regression/ust/fork/test_fork.py
new file mode 100644 (file)
index 0000000..62faf71
--- /dev/null
+++ b/tests/regression/ust/fork/test_fork.py
@@ -0,0 +1,124 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) - 2013 Jérémie Galarneau <jeremie.galarneau@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, "ust_tests_fork*")
+start_session(session_info)
+
+fork_process = subprocess.Popen([test_path + "fork", test_path + "fork2"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+
+if sys.version_info >= (3, 3):
+    try:
+        fork_process.wait(5)
+    except TimeoutExpired:
+        fork_process.kill()
+        bail("Failed to run fork test application (time out)", session_info)
+else:
+    fork_process.wait()
+
+parent_pid = -1
+child_pid = -1
+for line in fork_process.stdout:
+    line = line.decode('utf-8').replace("\n", "")
+    match = re.search(r"child_pid (\d+)", line)
+    if match:
+        child_pid = match.group(1)
+    match = re.search(r"parent_pid (\d+)", line)
+    if match:
+        parent_pid = match.group(1)
+
+print_test_result(fork_process.returncode == 0, current_test, "Fork test application exited normally")
+current_test += 1
+
+stop_session(session_info)
+
+# Check both events (normal exit and suicide messages) are present 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)
+
+event_lines = []
+for event_line in babeltrace_process.stdout:
+    event_line = event_line.decode('utf-8').replace("\n", "")
+    if re.search(r"warning", event_line) is not None or re.search(r"error", event_line) is not None:
+        print( "# " + event_line )
+    else:
+        event_lines.append(event_line)
+
+babeltrace_process.wait()
+
+print_test_result(babeltrace_process.returncode == 0, current_test, "Resulting trace is readable")
+current_test += 1
+
+if babeltrace_process.returncode != 0:
+    bail("Unreadable trace; can't proceed with analysis.", session_info)
+
+event_before_fork = False
+event_after_fork_parent = False
+event_after_fork_child = False
+event_after_exec = False
+
+for event_line in event_lines:
+    match = re.search(r".*pid = (\d+)", event_line)
+    if match is not None:
+        event_pid = match.group(1)
+    else:
+        continue
+
+    if re.search(r"before_fork", event_line):
+        event_before_fork = (event_pid == parent_pid)
+    if re.search(r"after_fork_parent", event_line):
+        event_after_fork_parent = (event_pid == parent_pid)
+    if re.search(r"after_fork_child", event_line):
+        event_after_fork_child = (event_pid == child_pid)
+    if re.search(r"after_exec", event_line):
+        event_after_exec = (event_pid == child_pid)
+
+print_test_result(event_before_fork, current_test, "before_fork event logged by parent process found in trace")
+current_test += 1
+print_test_result(event_after_fork_parent, current_test, "after_fork_parent event logged by parent process found in trace")
+current_test += 1
+print_test_result(event_after_fork_child, current_test, "after_fork_child event logged by child process found in trace")
+current_test += 1
+print_test_result(event_after_exec, current_test, "after_exec event logged by child process found in trace")
+current_test += 1
+
+shutil.rmtree(session_info.tmp_directory)