Tests: test_exclusion: exclusion after tracing active

This testcase tests for a UST bug where exclusions made when the tracing
is active are not excluding the undesired events.

This UST bug was fixed by the following commit:
  commit de713d8a77cbd77e60f58537b0fc222f98fde395
  Author: Francis Deslauriers <francis.deslauriers@efficios.com>
  Date:   Tue May 5 11:51:58 2020 -0400

      Fix: event probes attached before event enabled

Signed-off-by: Francis Deslauriers <francis.deslauriers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Change-Id: I6d896682d5f5e16582ab195c6f4d6946de394843
Depends-on: lttng-ust: Id984f266d976f346b001db81cd8a2b74965b5ef2

diff --git a/tests/regression/tools/exclusion/test_exclusion b/tests/regression/tools/exclusion/test_exclusion
index ed653b72f9a6c94705c8b618b7f33f72a06af36b..ce5e988e5e395ca1b410c9071ec12ef867d00be3 100755 (executable)
--- a/tests/regression/tools/exclusion/test_exclusion
+++ b/tests/regression/tools/exclusion/test_exclusion
@@ -16,7 +16,7 @@ TESTAPP_NAME="gen-ust-nevents"
 TESTAPP_BIN="$TESTAPP_PATH/$TESTAPP_NAME/$TESTAPP_NAME"
 NR_ITER=100
 NR_USEC_WAIT=1
-NUM_TESTS=178
+NUM_TESTS=185
 
 source $TESTDIR/utils/utils.sh
 
@@ -95,6 +95,59 @@ function test_exclusion
        fi
 }
 
+function test_exclusion_tracing_started
+{
+       local exclusions="$1"
+       local event_name_expected_to_be_missing="$2"
+       local trace_path=$(mktemp -d)
+       local file_wait_before_first=$(mktemp -u)
+       local file_create_in_main=$(mktemp -u)
+
+       # Create session
+       create_lttng_session_ok $SESSION_NAME $trace_path
+
+       # Enable a dummy event so that the session is active after we start the
+       # session.
+       enable_ust_lttng_event_ok $SESSION_NAME "non-existent-event"
+
+       # Start the tracing
+       start_lttng_tracing_ok $SESSION_NAME
+
+       # Launch the test app and make it create a sync file once it's in the
+       # main function.
+       $TESTAPP_BIN -i 1 -w 10000 \
+               --create-in-main ${file_create_in_main} \
+               --wait-before-first-event ${file_wait_before_first} 2>&1 &
+
+       while [ ! -f "${file_create_in_main}" ]; do
+               sleep 0.5
+       done
+
+       # Enable an event with an exclusion once the tracing is active in the
+       # UST app.
+       enable_ust_lttng_all_event_exclusion $SESSION_NAME "$exclusions"
+       ok $? "Enable lttng event with event \"$exclusions\" excluded"
+
+       # Create the sync file so that the test app starts generating events.
+       touch ${file_wait_before_first}
+
+       # Wait for the testapp to finish.
+       wait
+
+       stop_lttng_tracing_ok $SESSION_NAME
+
+       # Destroy session
+       destroy_lttng_session_ok $SESSION_NAME
+
+       stats=$(babeltrace $trace_path | $STATS_BIN --tracepoint "$event_name_expected_to_be_missing" | grep -v index 2> /dev/null)
+       if [ ! -z "$stats" ]; then
+               fail "Excluded event \"$event_name_expected_to_be_missing\" was found in trace!"
+       else
+               ok 0 "Validate trace exclusion output"
+               rm -rf $trace_path
+       fi
+}
+
 function test_exclusion_fail
 {
        event_name="$1"
@@ -147,6 +200,8 @@ test_exclusion '*3' 'tp:tptest3'
 test_exclusion 'tp*test3,*2' 'tp:tptest2'
 test_exclusion '**tp*test3,*2' 'tp:tptest3'
 
+test_exclusion_tracing_started 'tp:tptest1' 'tp:tptest1'
+
 diag "Cannot use exclusions with non-globbing event name"
 test_exclusion_fail "allo" "lol"
 test_exclusion_fail "allo" "meow,lol"