Fix: tests: don't use pidof to wait for test apps

[lttng-tools.git] / tests / regression / ust / periodical-metadata-flush / test_periodical_metadata_flush

diff --git a/tests/regression/ust/periodical-metadata-flush/test_periodical_metadata_flush b/tests/regression/ust/periodical-metadata-flush/test_periodical_metadata_flush
index ad9d33d521ddbbdb022040df5599f9a539777a12..e4199652bce1a456333ca0d88cbe869a5b590f96 100755 (executable)
--- a/tests/regression/ust/periodical-metadata-flush/test_periodical_metadata_flush
+++ b/tests/regression/ust/periodical-metadata-flush/test_periodical_metadata_flush
@@ -27,6 +27,7 @@ SESSION_NAME="periodical-flush"
 EVENT_NAME="tp:tptest"
 BIN_NAME="gen-nevents"
 NUM_TESTS=38
+APP_TMP_FILE="/tmp/lttng_test_ust.42.file"
 
 source $TESTDIR/utils/utils.sh
 
@@ -72,14 +73,6 @@ function enable_metadata_per_pid()
        ok $? "Enable channel $channel_name per PID for session $sess_name"
 }
 
-function wait_apps
-{
-       diag "Waiting for applications to end..."
-       while [ -n "$(pidof $TESTAPP_NAME)" ]; do
-               sleep 1
-       done
-}
-
 function validate_trace()
 {
        local out
@@ -98,6 +91,30 @@ function validate_trace()
        return $out
 }
 
+function check_app_tmp_file()
+{
+       # Wait for the application file to appear indicating that at least one
+       # tracepoint has been fired.
+       while [ ! -f "$APP_TMP_FILE" ]; do
+               sleep 0.5
+       done
+       diag "Removing test app temporary file $APP_TMP_FILE"
+       rm -f $APP_TMP_FILE
+}
+
+function start_trace_app()
+{
+       # Start application with a temporary file.
+       $TESTAPP_BIN $NR_ITER $NR_USEC_WAIT $APP_TMP_FILE &
+       ok $? "Start application to trace"
+}
+
+function start_check_trace_app()
+{
+       start_trace_app
+       check_app_tmp_file
+}
+
 test_after_app_pid() {
        local out
 
@@ -110,11 +127,8 @@ test_after_app_pid() {
        start_lttng_tracing $SESSION_NAME
 
        # Start application after tracing
-       $TESTAPP_BIN $NR_ITER $NR_USEC_WAIT &
-       ok $? "Start application to trace"
-
-       # At least hit one event
-       sleep 2
+       start_check_trace_app
+       # After this point we are sure that at least one event has been hit.
 
        # Make sure the application does not generate any more data,
        # thus ensuring that we are not flushing a packet concurrently
@@ -127,22 +141,22 @@ test_after_app_pid() {
        validate_trace
        out=$?
 
+       killall -SIGKILL -q $TESTAPP_NAME
        stop_lttng_tracing $SESSION_NAME
        destroy_lttng_session $SESSION_NAME
 
-       killall -SIGKILL -q $TESTAPP_NAME
-       wait_apps
+       wait
 
        return $out
 }
 
 test_before_app_pid() {
        local out
+       local tmp_file="/tmp/lttng_test_ust.42.file"
 
        diag "Start application BEFORE tracing is started"
 
-       $TESTAPP_BIN $NR_ITER $NR_USEC_WAIT &
-       ok $? "Start application to trace"
+       start_trace_app
 
        # Start application before tracing
        create_lttng_session $SESSION_NAME $TRACE_PATH
@@ -151,7 +165,8 @@ test_before_app_pid() {
        enable_ust_lttng_event $SESSION_NAME $EVENT_NAME "channel0"
        start_lttng_tracing $SESSION_NAME
 
-       # At least hit one event
+       check_app_tmp_file
+       # Let the application at least perform a flush!
        sleep 2
 
        # Make sure the application does not generate any more data,
@@ -165,11 +180,11 @@ test_before_app_pid() {
        validate_trace
        out=$?
 
+       killall -SIGKILL -q $TESTAPP_NAME
        stop_lttng_tracing $SESSION_NAME
        destroy_lttng_session $SESSION_NAME
 
-       killall -SIGKILL -q $TESTAPP_NAME
-       wait_apps
+       wait
 
        return $out
 }
@@ -186,11 +201,8 @@ test_after_app_uid() {
        start_lttng_tracing $SESSION_NAME
 
        # Start application after tracing
-       $TESTAPP_BIN $NR_ITER $NR_USEC_WAIT &
-       ok $? "Start application to trace"
-
-       # At least hit one event
-       sleep 2
+       start_check_trace_app
+       # After this point we are sure that at least one event has been hit.
 
        # Make sure the application does not generate any more data,
        # thus ensuring that we are not flushing a packet concurrently
@@ -203,11 +215,11 @@ test_after_app_uid() {
        validate_trace
        out=$?
 
+       killall -SIGKILL -q $TESTAPP_NAME
        stop_lttng_tracing $SESSION_NAME
        destroy_lttng_session $SESSION_NAME
 
-       killall -SIGKILL -q $TESTAPP_NAME
-       wait_apps
+       wait
 
        return $out
 }
@@ -218,8 +230,7 @@ test_before_app_uid() {
        diag "Start application BEFORE tracing is started"
 
        # Start application before tracing
-       $TESTAPP_BIN $NR_ITER $NR_USEC_WAIT &
-       ok $? "Start application to trace"
+       start_trace_app
 
        create_lttng_session $SESSION_NAME $TRACE_PATH
        enable_metadata_per_uid $SESSION_NAME
@@ -227,7 +238,8 @@ test_before_app_uid() {
        enable_ust_lttng_event $SESSION_NAME $EVENT_NAME "channel0"
        start_lttng_tracing $SESSION_NAME
 
-       # At least hit one event
+       check_app_tmp_file
+       # Let the application at least perform a flush!
        sleep 2
 
        # Make sure the application does not generate any more data,
@@ -241,11 +253,11 @@ test_before_app_uid() {
        validate_trace
        out=$?
 
+       killall -SIGKILL -q $TESTAPP_NAME
        stop_lttng_tracing $SESSION_NAME
        destroy_lttng_session $SESSION_NAME
 
-       killall -SIGKILL -q $TESTAPP_NAME
-       wait_apps
+       wait
 
        return $out
 }