Basic test ust_app_vs_ust_tools

diff --git a/lttng_ivc/tests/ust_app_vs_ust_tools/__init__.py b/lttng_ivc/tests/ust_app_vs_ust_tools/__init__.py
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diff --git a/lttng_ivc/tests/ust_app_vs_ust_tools/test_ust_app_vs_ust_tools.py b/lttng_ivc/tests/ust_app_vs_ust_tools/test_ust_app_vs_ust_tools.py
new file mode 100644 (file)
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+++ b/lttng_ivc/tests/ust_app_vs_ust_tools/test_ust_app_vs_ust_tools.py
@@ -0,0 +1,153 @@
+import pytest
+import os
+import shutil
+import signal
+import subprocess
+
+import lttng_ivc.utils.ProjectFactory as ProjectFactory
+import lttng_ivc.utils.utils as utils
+import lttng_ivc.utils.runtime as Run
+import lttng_ivc.settings as Settings
+
+"""
+
+FC: Fully Compatible
+BC: Feature of the smallest version number will works.
+TU: Tracing unavailable
+
++------------------------------------------------------------------------------+
+|              LTTng UST control protocol compatibility matrix                 |
+|   (between applications and tools linked on LTTng UST and liblttng-ust-ctl)  |
++--------------------------+------------+------------+------------+------------+
+| LTTng UST / LTTng Tools  | 2.7 (6.0)  | 2.8 (6.1)  | 2.9 (7.1)  | 2.10 (7.2) |
++--------------------------+------------+------------+------------+------------+
+| 2.7 (6.0)                | FC         | BC         | TU         | TU         |
+| 2.8 (6.1)                | BC         | FC         | TU         | TU         |
+| 2.9 (7.1)                | TU         | TU         | FC         | BC         |
+| 2.10 (7.2)               | TU         | TU         | BC         | FC         |
++--------------------------+------------+------------+------------+------------+
+
+Version number of this API is defined in include/lttng/ust-abi.h of lttng-ust project
+
+"""
+
+"""
+First tuple member: lttng-ust label
+Second tuple member: lttng-tool label
+Third tuple member: expected scenario
+"""
+
+test_matrix_tracing_available = [
+    ("lttng-ust-2.7", "lttng-tools-2.7",   True),
+    ("lttng-ust-2.7", "lttng-tools-2.8",   True),
+    ("lttng-ust-2.7", "lttng-tools-2.9",   False),
+    ("lttng-ust-2.7", "lttng-tools-2.10",  False),
+    ("lttng-ust-2.8", "lttng-tools-2.7",   True),
+    ("lttng-ust-2.8", "lttng-tools-2.8",   True),
+    ("lttng-ust-2.8", "lttng-tools-2.9",   False),
+    ("lttng-ust-2.8", "lttng-tools-2.10",  False),
+    ("lttng-ust-2.9", "lttng-tools-2.7",   False),
+    ("lttng-ust-2.9", "lttng-tools-2.8",   False),
+    ("lttng-ust-2.9", "lttng-tools-2.9",   True),
+    ("lttng-ust-2.9", "lttng-tools-2.10",  True),
+    ("lttng-ust-2.10", "lttng-tools-2.7",  False),
+    ("lttng-ust-2.10", "lttng-tools-2.8",  False),
+    ("lttng-ust-2.10", "lttng-tools-2.9",  True),
+    ("lttng-ust-2.10", "lttng-tools-2.10", True),
+]
+
+# Only consider test case for which tracing is valid
+test_matrix_other = [
+    ("lttng-ust-2.7", "lttng-tools-2.7",  ""),
+    ("lttng-ust-2.7", "lttng-tools-2.8",  ""),
+    ("lttng-ust-2.7", "lttng-tools-2.9",  ""),
+    ("lttng-ust-2.7", "lttng-tools-2.10", ""),
+    ("lttng-ust-2.8", "lttng-tools-2.7",  ""),
+    ("lttng-ust-2.8", "lttng-tools-2.8",  ""),
+    ("lttng-ust-2.8", "lttng-tools-2.9",  ""),
+    ("lttng-ust-2.8", "lttng-tools-2.10", ""),
+    ("lttng-ust-2.9", "lttng-tools-2.7",  ""),
+    ("lttng-ust-2.9", "lttng-tools-2.8",  ""),
+    ("lttng-ust-2.9", "lttng-tools-2.9",  ""),
+    ("lttng-ust-2.9", "lttng-tools-2.10", ""),
+    ("lttng-ust-2.10", "lttng-tools-2.7", ""),
+    ("lttng-ust-2.10", "lttng-tools-2.8", ""),
+    ("lttng-ust-2.10", "lttng-tools-2.9", ""),
+    ("lttng-ust-2.10", "lttng-tools-2.10", ""),
+]
+
+runtime_matrix_tracing_available = []
+
+if not Settings.test_only:
+    runtime_matrix_tracing_available = test_matrix_tracing_available
+else:
+    for tup in test_matrix_tracing_available:
+        if (tup[0] in Settings.test_only or tup[1] in
+                Settings.test_only):
+            runtime_matrix_tracing_available.append(tup)
+
+
+def lttng_sessiond_ready():
+    print("lttng sessiond is ready ! FFS")
+
+@pytest.mark.parametrize("ust_label,tools_label, should_trace", runtime_matrix_tracing_available)
+def test_ust_app_tracing_available(tmpdir, ust_label, tools_label, should_trace):
+
+    nb_events = 100
+
+    # Prepare environment
+    ust = ProjectFactory.get_precook(ust_label)
+    tools = ProjectFactory.get_precook(tools_label)
+    babeltrace = ProjectFactory.get_precook(Settings.default_babeltrace)
+
+    tools_runtime_path = os.path.join(str(tmpdir), "tools")
+    ust_runtime_path = os.path.join(str(tmpdir), "ust")
+    app_path = os.path.join(str(tmpdir), "app")
+
+    with Run.get_runtime(ust_runtime_path) as runtime_app, Run.get_runtime(tools_runtime_path) as runtime_tools:
+        runtime_tools.add_project(tools)
+        runtime_tools.add_project(babeltrace)
+
+        runtime_app.add_project(ust)
+        runtime_app.lttng_home = runtime_tools.lttng_home
+
+        trace_path = os.path.join(runtime_tools.lttng_home, 'trace')
+
+        # Make application using the ust runtime
+        shutil.copytree(Settings.apps_gen_events_folder, app_path)
+        runtime_app.run("make V=1", cwd=app_path)
+
+        # Start lttng-sessiond
+        # TODO: extract to utils function with a runtime as parameter
+        previous_handler = signal.signal(signal.SIGUSR1, lttng_sessiond_ready)
+        runtime_tools.spawn_subprocess("lttng-sessiond -vvv -S")
+        signal.sigtimedwait({signal.SIGUSR1}, 60)
+        previous_handler = signal.signal(signal.SIGUSR1, previous_handler)
+
+        # Create session using mi to get path and session name
+        runtime_tools.run('lttng create trace --output={}'.format(trace_path))
+
+        # TODO: test with event present in listing
+
+        runtime_tools.run('lttng enable-event -u tp:tptest')
+        runtime_tools.run('lttng start')
+
+        # Run application
+        cmd = './app {}'.format(nb_events)
+        runtime_app.run(cmd, cwd=app_path)
+
+        # Stop tracing
+        runtime_tools.run('lttng destroy -a')
+
+        try:
+            # Read trace with babeltrace and check for event count via number of line
+            cmd = 'babeltrace {}'.format(trace_path)
+            cp_process, cp_out, cp_err = runtime_tools.run(cmd)
+            assert(utils.line_count(cp_out) == nb_events)
+        except subprocess.CalledProcessError as e:
+            # Check if we expected a problem here
+            if should_trace:
+                # Something happened
+                raise e
+
+