| 1 | #!/usr/bin/env python3 |
| 2 | # |
| 3 | # Copyright (C) 2022 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 4 | # Copyright (C) 2023 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 5 | # |
| 6 | # SPDX-License-Identifier: GPL-2.0-only |
| 7 | |
| 8 | from cgi import test |
| 9 | import pathlib |
| 10 | import sys |
| 11 | import os |
| 12 | from typing import Any, Callable, Type |
| 13 | |
| 14 | """ |
| 15 | Test instrumentation coverage of C/C++ constructors and destructors by LTTng-UST |
| 16 | tracepoints. |
| 17 | |
| 18 | This test successively sets up a session, traces a test application, and then |
| 19 | reads the resulting trace to determine if all the expected events are present. |
| 20 | """ |
| 21 | |
| 22 | # Import in-tree test utils |
| 23 | test_utils_import_path = pathlib.Path(__file__).absolute().parents[3] / "utils" |
| 24 | sys.path.append(str(test_utils_import_path)) |
| 25 | |
| 26 | import lttngtest |
| 27 | import bt2 |
| 28 | |
| 29 | num_tests = 3 |
| 30 | |
| 31 | expected_events = [ |
| 32 | {"name": "tp_so:constructor_c_provider_shared_library", "msg": None, "count": 0}, |
| 33 | {"name": "tp_a:constructor_c_provider_static_archive", "msg": None, "count": 0}, |
| 34 | { |
| 35 | "name": "tp_so:constructor_cplusplus_provider_shared_library", |
| 36 | "msg": "global - shared library define and provider", |
| 37 | "count": 0, |
| 38 | }, |
| 39 | { |
| 40 | "name": "tp_a:constructor_cplusplus_provider_static_archive", |
| 41 | "msg": "global - static archive define and provider", |
| 42 | "count": 0, |
| 43 | }, |
| 44 | {"name": "tp:constructor_c_across_units_before_define", "msg": None, "count": 0}, |
| 45 | { |
| 46 | "name": "tp:constructor_cplusplus", |
| 47 | "msg": "global - across units before define", |
| 48 | "count": 0, |
| 49 | }, |
| 50 | {"name": "tp:constructor_c_same_unit_before_define", "msg": None, "count": 0}, |
| 51 | {"name": "tp:constructor_c_same_unit_after_define", "msg": None, "count": 0}, |
| 52 | { |
| 53 | "name": "tp:constructor_cplusplus", |
| 54 | "msg": "global - same unit before define", |
| 55 | "count": 0, |
| 56 | }, |
| 57 | { |
| 58 | "name": "tp:constructor_cplusplus", |
| 59 | "msg": "global - same unit after define", |
| 60 | "count": 0, |
| 61 | }, |
| 62 | {"name": "tp:constructor_c_across_units_after_define", "msg": None, "count": 0}, |
| 63 | { |
| 64 | "name": "tp:constructor_cplusplus", |
| 65 | "msg": "global - across units after define", |
| 66 | "count": 0, |
| 67 | }, |
| 68 | {"name": "tp:constructor_c_same_unit_before_provider", "msg": None, "count": 0}, |
| 69 | {"name": "tp:constructor_c_same_unit_after_provider", "msg": None, "count": 0}, |
| 70 | { |
| 71 | "name": "tp:constructor_cplusplus", |
| 72 | "msg": "global - same unit before provider", |
| 73 | "count": 0, |
| 74 | }, |
| 75 | { |
| 76 | "name": "tp:constructor_cplusplus", |
| 77 | "msg": "global - same unit after provider", |
| 78 | "count": 0, |
| 79 | }, |
| 80 | {"name": "tp:constructor_c_across_units_after_provider", "msg": None, "count": 0}, |
| 81 | { |
| 82 | "name": "tp:constructor_cplusplus", |
| 83 | "msg": "global - across units after provider", |
| 84 | "count": 0, |
| 85 | }, |
| 86 | {"name": "tp:constructor_cplusplus", "msg": "main() local", "count": 0}, |
| 87 | { |
| 88 | "name": "tp_so:constructor_cplusplus_provider_shared_library", |
| 89 | "msg": "main() local - shared library define and provider", |
| 90 | "count": 0, |
| 91 | }, |
| 92 | { |
| 93 | "name": "tp_a:constructor_cplusplus_provider_static_archive", |
| 94 | "msg": "main() local - static archive define and provider", |
| 95 | "count": 0, |
| 96 | }, |
| 97 | {"name": "tp:main", "msg": None, "count": 0}, |
| 98 | { |
| 99 | "name": "tp_a:destructor_cplusplus_provider_static_archive", |
| 100 | "msg": "main() local - static archive define and provider", |
| 101 | "count": 0, |
| 102 | }, |
| 103 | { |
| 104 | "name": "tp_so:destructor_cplusplus_provider_shared_library", |
| 105 | "msg": "main() local - shared library define and provider", |
| 106 | "count": 0, |
| 107 | }, |
| 108 | {"name": "tp:destructor_cplusplus", "msg": "main() local", "count": 0}, |
| 109 | { |
| 110 | "name": "tp:destructor_cplusplus", |
| 111 | "msg": "global - across units after provider", |
| 112 | "count": 0, |
| 113 | }, |
| 114 | { |
| 115 | "name": "tp:destructor_cplusplus", |
| 116 | "msg": "global - same unit after provider", |
| 117 | "count": 0, |
| 118 | }, |
| 119 | { |
| 120 | "name": "tp:destructor_cplusplus", |
| 121 | "msg": "global - same unit before provider", |
| 122 | "count": 0, |
| 123 | }, |
| 124 | { |
| 125 | "name": "tp:destructor_cplusplus", |
| 126 | "msg": "global - across units after define", |
| 127 | "count": 0, |
| 128 | }, |
| 129 | { |
| 130 | "name": "tp:destructor_cplusplus", |
| 131 | "msg": "global - same unit after define", |
| 132 | "count": 0, |
| 133 | }, |
| 134 | { |
| 135 | "name": "tp:destructor_cplusplus", |
| 136 | "msg": "global - same unit before define", |
| 137 | "count": 0, |
| 138 | }, |
| 139 | { |
| 140 | "name": "tp:destructor_cplusplus", |
| 141 | "msg": "global - across units before define", |
| 142 | "count": 0, |
| 143 | }, |
| 144 | { |
| 145 | "name": "tp_a:destructor_cplusplus_provider_static_archive", |
| 146 | "msg": "global - static archive define and provider", |
| 147 | "count": 0, |
| 148 | }, |
| 149 | { |
| 150 | "name": "tp_so:destructor_cplusplus_provider_shared_library", |
| 151 | "msg": "global - shared library define and provider", |
| 152 | "count": 0, |
| 153 | }, |
| 154 | {"name": "tp:destructor_c_across_units_after_provider", "msg": None, "count": 0}, |
| 155 | {"name": "tp:destructor_c_same_unit_after_provider", "msg": None, "count": 0}, |
| 156 | {"name": "tp:destructor_c_same_unit_before_provider", "msg": None, "count": 0}, |
| 157 | {"name": "tp:destructor_c_across_units_after_define", "msg": None, "count": 0}, |
| 158 | {"name": "tp:destructor_c_same_unit_after_define", "msg": None, "count": 0}, |
| 159 | {"name": "tp:destructor_c_same_unit_before_define", "msg": None, "count": 0}, |
| 160 | {"name": "tp:destructor_c_across_units_before_define", "msg": None, "count": 0}, |
| 161 | {"name": "tp_a:destructor_c_provider_static_archive", "msg": None, "count": 0}, |
| 162 | {"name": "tp_so:destructor_c_provider_shared_library", "msg": None, "count": 0}, |
| 163 | ] |
| 164 | |
| 165 | |
| 166 | def capture_trace(tap, test_env): |
| 167 | # type: (lttngtest.TapGenerator, lttngtest._Environment) -> lttngtest.LocalSessionOutputLocation |
| 168 | tap.diagnostic( |
| 169 | "Capture trace from application with instrumented C/C++ constructors/destructors" |
| 170 | ) |
| 171 | |
| 172 | session_output_location = lttngtest.LocalSessionOutputLocation( |
| 173 | test_env.create_temporary_directory("trace") |
| 174 | ) |
| 175 | |
| 176 | client = lttngtest.LTTngClient(test_env, log=tap.diagnostic) |
| 177 | |
| 178 | with tap.case("Create a session") as test_case: |
| 179 | session = client.create_session(output=session_output_location) |
| 180 | tap.diagnostic("Created session `{session_name}`".format(session_name=session.name)) |
| 181 | |
| 182 | with tap.case( |
| 183 | "Add a channel to session `{session_name}`".format(session_name=session.name) |
| 184 | ) as test_case: |
| 185 | channel = session.add_channel(lttngtest.TracingDomain.User) |
| 186 | tap.diagnostic("Created channel `{channel_name}`".format(channel_name=channel.name)) |
| 187 | |
| 188 | # Enable all user space events, the default for a user tracepoint event rule. |
| 189 | channel.add_recording_rule(lttngtest.UserTracepointEventRule("tp*")) |
| 190 | |
| 191 | session.start() |
| 192 | test_app = test_env.launch_trace_test_constructor_application() |
| 193 | test_app.wait_for_exit() |
| 194 | session.stop() |
| 195 | session.destroy() |
| 196 | return session_output_location |
| 197 | |
| 198 | |
| 199 | def validate_trace(trace_location, tap): |
| 200 | # type: (pathlib.Path, lttngtest.TapGenerator) -> bool |
| 201 | success = True |
| 202 | unknown_event_count = 0 |
| 203 | |
| 204 | for msg in bt2.TraceCollectionMessageIterator(str(trace_location)): |
| 205 | if type(msg) is not bt2._EventMessageConst: |
| 206 | continue |
| 207 | |
| 208 | found = False |
| 209 | for event in expected_events: |
| 210 | if event["name"] == msg.event.name and event["msg"] is None: |
| 211 | found = True |
| 212 | event["count"] = event["count"] + 1 |
| 213 | break |
| 214 | elif ( |
| 215 | event["name"] == msg.event.name |
| 216 | and event["msg"] is not None |
| 217 | and event["msg"] == msg.event["msg"] |
| 218 | ): |
| 219 | found = True |
| 220 | event["count"] = event["count"] + 1 |
| 221 | break |
| 222 | if found == False: |
| 223 | unknown_event_count = unknown_event_count + 1 |
| 224 | printmsg = None |
| 225 | if "msg" in msg.event: |
| 226 | printmsg = msg.event["msg"] |
| 227 | tap.diagnostic( |
| 228 | 'Unexpected event name="{}" msg="{}" encountered'.format( |
| 229 | msg.event.name, str(printmsg) |
| 230 | ) |
| 231 | ) |
| 232 | |
| 233 | for event in expected_events: |
| 234 | if event["count"] != 1: |
| 235 | success = False |
| 236 | tap.diagnostic("Expected event {} not found".format(event["name"])) |
| 237 | if unknown_event_count != 0: |
| 238 | success = False |
| 239 | return success |
| 240 | |
| 241 | |
| 242 | tap = lttngtest.TapGenerator(num_tests) |
| 243 | tap.diagnostic("Test user space constructor/destructor instrumentation coverage") |
| 244 | |
| 245 | with lttngtest.test_environment(with_sessiond=True, log=tap.diagnostic) as test_env: |
| 246 | outputlocation = capture_trace(tap, test_env) |
| 247 | tap.test( |
| 248 | validate_trace(outputlocation.path, tap), |
| 249 | "Validate that trace constains expected events", |
| 250 | ) |
| 251 | |
| 252 | sys.exit(0 if tap.is_successful else 1) |