Tests: triggers: Add kprobe event rule condition kernel tests
authorFrancis Deslauriers <francis.deslauriers@efficios.com>
Wed, 12 Feb 2020 00:27:54 +0000 (19:27 -0500)
committerJérémie Galarneau <jeremie.galarneau@efficios.com>
Thu, 4 Mar 2021 17:21:01 +0000 (12:21 -0500)
Signed-off-by: Francis Deslauriers <francis.deslauriers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Change-Id: Icc941c594374326eded1c8a10b32187cdb98d4df
Depends-on: lttng-ust: I5a800fc92e588c2a6a0e26282b0ad5f31c044479

tests/regression/Makefile.am
tests/regression/tools/notification/Makefile.am
tests/regression/tools/notification/notification.c
tests/regression/tools/notification/test_notification_kernel_instrumentation [new file with mode: 0755]

index 8ffb1a5f13f508ad7419df1efd9b0df3e3f24536..4e7f454c0069c12072687fa002252e8fbfacd428 100644 (file)
@@ -32,6 +32,7 @@ TESTS = tools/filtering/test_invalid_filter \
        tools/notification/test_notification_ust_event_rule_condition_exclusion \
        tools/notification/test_notification_kernel_error \
        tools/notification/test_notification_kernel_buffer_usage \
+       tools/notification/test_notification_kernel_instrumentation \
        tools/notification/test_notification_multi_app \
        tools/rotation/test_ust \
        tools/rotation/test_kernel \
index dc79067f6abe464a313f703664de47ff6bac96f1..fc8bec2853f1d17e803601fc34d384a515706848 100644 (file)
@@ -10,7 +10,7 @@ noinst_PROGRAMS = base_client notification rotation
 if NO_SHARED
 
 CLEANFILES = libpause_consumer.so libpause_consumer.so.debug
-EXTRA_DIST = test_notification_ust_error test_notification_ust_buffer_usage test_notification_ust_event_rule_condition_exclusion test_notification_kernel_error test_notification_kernel_buffer_usage test_notification_multi_app base_client.c notification.c consumer_testpoints.c util_event_generator.sh
+EXTRA_DIST = test_notification_ust_error test_notification_ust_buffer_usage test_notification_ust_event_rule_condition_exclusion test_notification_kernel_error test_notification_kernel_buffer_usage test_notification_kernel_instrumentation test_notification_multi_app base_client.c notification.c consumer_testpoints.c util_event_generator.sh
 
 else
 
@@ -37,9 +37,8 @@ notification_LDADD = $(LIB_LTTNG_CTL) $(LIBTAP) -lm
 rotation_SOURCES = rotation.c
 rotation_LDADD = $(LIB_LTTNG_CTL) $(LIBTAP) -lm
 
-noinst_SCRIPTS = test_notification_ust_error test_notification_ust_buffer_usage test_notification_ust_event_rule_condition_exclusion test_notification_kernel_error test_notification_kernel_buffer_usage test_notification_multi_app test_rotation util_event_generator.sh
-EXTRA_DIST = test_notification_ust_error test_notification_ust_buffer_usage test_notification_ust_event_rule_condition_exclusion test_notification_kernel_error test_notification_kernel_buffer_usage test_notification_multi_app test_rotation util_event_generator.sh
-
+noinst_SCRIPTS = test_notification_ust_error test_notification_ust_buffer_usage test_notification_ust_event_rule_condition_exclusion test_notification_kernel_error test_notification_kernel_buffer_usage test_notification_kernel_instrumentation test_notification_multi_app test_rotation util_event_generator.sh
+EXTRA_DIST = test_notification_ust_error test_notification_ust_buffer_usage test_notification_ust_event_rule_condition_exclusion test_notification_kernel_error test_notification_kernel_buffer_usage test_notification_kernel_instrumentation test_notification_multi_app test_rotation util_event_generator.sh
 
 all-local:
        @if [ x"$(srcdir)" != x"$(builddir)" ]; then \
index f5e44210ab7c2898e5815654fbaaba201793b4f5..6b70840c738091cdf88d29032836e219be0d8634 100644 (file)
@@ -32,7 +32,9 @@
 #include <lttng/condition/event-rule.h>
 #include <lttng/domain.h>
 #include <lttng/endpoint.h>
+#include <lttng/event-rule/kprobe.h>
 #include <lttng/event-rule/tracepoint.h>
+#include <lttng/kernel-probe.h>
 #include <lttng/lttng-error.h>
 #include <lttng/lttng.h>
 #include <lttng/notification/channel.h>
@@ -1207,6 +1209,100 @@ static void test_tracepoint_event_rule_notification_exclusion(
        return;
 }
 
+static void test_kprobe_event_rule_notification(
+               enum lttng_domain_type domain_type)
+{
+       int i, ret;
+       const int notification_count = 3;
+       enum lttng_notification_channel_status nc_status;
+       enum lttng_event_rule_status event_rule_status;
+       enum lttng_trigger_status trigger_status;
+       struct lttng_notification_channel *notification_channel = NULL;
+       struct lttng_condition *condition = NULL;
+       struct lttng_kernel_probe_location *location = NULL;
+       struct lttng_event_rule *event_rule = NULL;
+       struct lttng_action *action = NULL;
+       struct lttng_trigger *trigger = NULL;
+       const char * const trigger_name = "kprobe_trigger";
+       const char * const symbol_name = "lttng_test_filter_event_write";
+
+       action = lttng_action_notify_create();
+       if (!action) {
+               fail("Failed to create notify action");
+               goto end;
+       }
+
+       location = lttng_kernel_probe_location_symbol_create(symbol_name, 0);
+       if (!location) {
+               fail("Failed to create kernel probe location");
+               goto end;
+       }
+
+       notification_channel = lttng_notification_channel_create(
+                       lttng_session_daemon_notification_endpoint);
+       ok(notification_channel, "Notification channel object creation");
+
+       event_rule = lttng_event_rule_kprobe_create();
+       ok(event_rule, "kprobe event rule object creation");
+
+       event_rule_status = lttng_event_rule_kprobe_set_location(
+                       event_rule, location);
+       ok(event_rule_status == LTTNG_EVENT_RULE_STATUS_OK,
+                       "Setting kprobe event rule location: '%s'", symbol_name);
+
+       event_rule_status = lttng_event_rule_kprobe_set_name(
+                       event_rule, trigger_name);
+       ok(event_rule_status == LTTNG_EVENT_RULE_STATUS_OK,
+                       "Setting kprobe event rule name: '%s'", trigger_name);
+
+       condition = lttng_condition_event_rule_create(event_rule);
+       ok(condition, "Condition event rule object creation");
+
+       /* Register the trigger for condition. */
+       trigger = lttng_trigger_create(condition, action);
+       if (!trigger) {
+               fail("Failed to create trigger with kernel probe event rule condition and notify action");
+               goto end;
+       }
+
+       trigger_status = lttng_trigger_set_name(trigger, trigger_name);
+       ok(trigger_status == LTTNG_TRIGGER_STATUS_OK,
+                       "Setting trigger name to '%s'", trigger_name);
+
+       ret = lttng_register_trigger(trigger);
+       if (ret) {
+               fail("Failed to register trigger with kernel probe event rule condition and notify action");
+               goto end;
+       }
+
+       nc_status = lttng_notification_channel_subscribe(
+                       notification_channel, condition);
+       ok(nc_status == LTTNG_NOTIFICATION_CHANNEL_STATUS_OK,
+                       "Subscribe to tracepoint event rule condition");
+
+       resume_application();
+
+       for (i = 0; i < notification_count; i++) {
+               char *name = get_next_notification_trigger_name(
+                               notification_channel);
+
+               ok(strcmp(trigger_name, name) == 0,
+                               "Received notification for the expected trigger name: '%s' (%d/%d)",
+                               trigger_name, i + 1, notification_count);
+               free(name);
+       }
+
+end:
+       suspend_application();
+       lttng_notification_channel_destroy(notification_channel);
+       lttng_unregister_trigger(trigger);
+       lttng_trigger_destroy(trigger);
+       lttng_action_destroy(action);
+       lttng_condition_destroy(condition);
+       lttng_kernel_probe_location_destroy(location);
+       return;
+}
+
 int main(int argc, const char *argv[])
 {
        int test_scenario;
@@ -1322,6 +1418,19 @@ int main(int argc, const char *argv[])
 
                break;
        }
+       case 4:
+       {
+               plan_tests(10);
+
+               /* Test cases that need the kernel tracer. */
+               assert(domain_type == LTTNG_DOMAIN_KERNEL);
+               diag("Test kprobe event rule notifications for domain %s",
+                               domain_type_string);
+
+               test_kprobe_event_rule_notification(domain_type);
+
+               break;
+       }
        default:
                abort();
        }
diff --git a/tests/regression/tools/notification/test_notification_kernel_instrumentation b/tests/regression/tools/notification/test_notification_kernel_instrumentation
new file mode 100755 (executable)
index 0000000..ef4efbc
--- /dev/null
@@ -0,0 +1,51 @@
+#!/bin/bash
+#
+# Copyright (C) 2017 Jonathan Rajotte-Julien <jonathan.rajotte-julien@efficios.com>
+#
+# SPDX-License-Identifier: LGPL-2.1-only
+
+CURDIR=$(dirname "$0")/
+TESTDIR=$CURDIR/../../../
+
+TMPDIR=$(mktemp -d)
+
+TESTAPP_STATE_PATH=$(mktemp -u "$TMPDIR/application_state.XXXXXXXXXX")
+
+NUM_TESTS=13
+
+# shellcheck source=../../../utils/utils.sh
+source "$TESTDIR/utils/utils.sh"
+# shellcheck source=./util_event_generator.sh
+source "$CURDIR/util_event_generator.sh"
+
+function test_kernel_instrumentation_notification
+{
+       kernel_event_generator generate_filter_events "$TESTAPP_STATE_PATH" &
+       APP_PID=$!
+
+       "$CURDIR/notification" 4 LTTNG_DOMAIN_KERNEL $APP_PID \
+               "$TESTAPP_STATE_PATH"
+
+       kill -SIGUSR2 $APP_PID
+       wait $APP_PID 2> /dev/null
+}
+
+if [ "$(id -u)" == "0" ]; then
+       validate_lttng_modules_present
+
+       modprobe lttng-test
+
+       start_lttng_sessiond_notap
+
+       test_kernel_instrumentation_notification
+
+       stop_lttng_sessiond_notap
+       rmmod lttng-test
+
+else
+       # Kernel tests are skipped.
+       plan_tests $NUM_TESTS
+       skip 0 "Root access is needed. Skipping all kernel notification tests." $NUM_TESTS
+fi
+
+rm -rf "$TMPDIR"
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