tests: Move to kernel style SPDX license identifiers
[lttng-tools.git] / tests / utils / test_utils.py
1 #!/usr/bin/env python3
2 #
3 # Copyright (C) 2013 Jérémie Galarneau <jeremie.galarneau@efficios.com>
4 #
5 # SPDX-License-Identifier: GPL-2.0-only
6 #
7
8 import uuid
9 import os
10 import subprocess
11 import shutil
12 import sys
13 import tempfile
14
15 # Import lttng bindings generated in the current tree
16 lttng_bindings_path = os.path.dirname(os.path.abspath(__file__)) + "/"
17 for i in range(3):
18 lttng_bindings_path = os.path.dirname(lttng_bindings_path)
19 lttng_bindings_path = lttng_bindings_path + "/extras/bindings/swig/python"
20 lttng_bindings_libs_path = lttng_bindings_path + "/.libs"
21 sys.path.append(lttng_bindings_path)
22 sys.path.append(lttng_bindings_libs_path)
23 from lttng import *
24
25
26 class SessionInfo:
27 def __init__(self, handle, session_name, tmp_directory, channel_name):
28 self.handle = handle
29 self.name = session_name
30 self.tmp_directory = tmp_directory
31 self.trace_path = tmp_directory + "/" + session_name
32 self.channel_name = channel_name
33
34 def bail(diag, session_info = None):
35 print("Bail out!")
36 print("#", diag)
37
38 if session_info is not None:
39 stop_session(session_info, True)
40
41 if os.path.exists(session_info.tmp_directory):
42 shutil.rmtree(session_info.tmp_directory)
43 exit(-1)
44
45 def print_test_result(result, number, description):
46 result_string = None
47 if result is True:
48 result_string = "ok"
49 else:
50 result_string = "not ok"
51
52 result_string += " {0} - {1}".format(number, description)
53 print(result_string)
54
55 def skip_test(number, description):
56 print('ok {} # skip {}'.format(number, description))
57
58 def enable_ust_tracepoint_event(session_info, event_name):
59 event = Event()
60 event.name = event_name
61 event.type = EVENT_TRACEPOINT
62 event.loglevel = EVENT_LOGLEVEL_ALL
63 res = enable_event(session_info.handle, event, session_info.channel_name)
64 if res < 0:
65 bail("Failed to enable userspace event " + event_name, session_info)
66
67 def create_session():
68 dom = Domain()
69 dom.type = DOMAIN_UST
70
71 session_name = str(uuid.uuid1())
72 tmp_directory = tempfile.mkdtemp()
73 trace_path = tmp_directory + "/" + session_name
74
75 res = create(session_name, trace_path)
76 if res < 0:
77 bail("Failed to create tracing session.")
78
79 channel = Channel()
80 channel.name = "channel0"
81 channel_set_default_attr(dom, channel.attr)
82
83 han = Handle(session_name, dom)
84 res = enable_channel(han, channel)
85
86 session_info = SessionInfo(han, session_name, tmp_directory, channel.name)
87 if res < 0:
88 bail("Failed to enable channel " + channel.name, session_info)
89 return session_info
90
91 def start_session(session_info):
92 start(session_info.name)
93
94 def stop_session(session_info, bailing = False):
95 # Workaround lttng-ctl outputing directly to stdout by spawning a subprocess.
96 lttng_binary_path = os.path.dirname(os.path.abspath(__file__)) + "/"
97 for i in range(3):
98 lttng_binary_path = os.path.dirname(lttng_binary_path)
99 lttng_binary_path = lttng_binary_path + "/src/bin/lttng/lttng"
100
101 retcode = subprocess.call([lttng_binary_path, "stop", session_info.name], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
102 if retcode != 0 and not bailing:
103 bail("Unable to stop session " + session_info.name, session_info)
104 destroy(session_info.name)
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