+/*
+ * Copyright (c) 2011 David Goulet <david.goulet@polymtl.ca>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * as published by the Free Software Foundation; only version 2
+ * of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#define _GNU_SOURCE
+#include <assert.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <time.h>
+
+#include <lttng/lttng.h>
+
+#include "../utils.h"
+
+int main(int argc, char **argv)
+{
+ struct lttng_handle *handle = NULL;
+ struct lttng_domain dom;
+ struct lttng_channel channel;
+ struct lttng_event sched_switch;
+ struct lttng_event sys_enter;
+ struct lttng_event sys_exit;
+
+ int ret = 0;
+
+ char *session_name = "kernel_event";
+
+ dom.type = LTTNG_DOMAIN_KERNEL;
+
+ strcpy(channel.name, "mychan");
+ channel.attr.overwrite = 0;
+ channel.attr.subbuf_size = 4096;
+ channel.attr.num_subbuf = 8;
+ channel.attr.switch_timer_interval = 0;
+ channel.attr.read_timer_interval = 200;
+ channel.attr.output = LTTNG_EVENT_SPLICE;
+
+ strcpy(sched_switch.name, "sched_switch");
+ sched_switch.type = LTTNG_EVENT_TRACEPOINT;
+
+ strcpy(sys_enter.name, "sys_enter");
+ sys_enter.type = LTTNG_EVENT_TRACEPOINT;
+
+ strcpy(sys_exit.name, "sys_exit");
+ sys_exit.type = LTTNG_EVENT_TRACEPOINT;
+
+ printf("\nTesting tracing kernel events:\n");
+ printf("-----------\n");
+ /* Check if root */
+ if (getuid() != 0) {
+ printf("Root access is needed.\nPlease run 'sudo make check' -- Aborting!\n");
+ return 0;
+ }
+
+ if (argc < 2) {
+ printf("Missing session trace path\n");
+ return 1;
+ }
+
+ printf("Creating tracing session (%s): ", argv[1]);
+ if ((ret = lttng_create_session(session_name, argv[1])) < 0) {
+ printf("error creating the session : %s\n", lttng_get_readable_code(ret));
+ goto create_fail;
+ }
+ PRINT_OK();
+
+ printf("Creating session handle: ");
+ if ((handle = lttng_create_handle(session_name, &dom)) == NULL) {
+ printf("error creating handle: %s\n", lttng_get_readable_code(ret));
+ goto handle_fail;
+ }
+ PRINT_OK();
+
+ printf("Enabling %s kernel channel: ", channel.name);
+ if ((ret = lttng_enable_channel(handle, &channel)) < 0) {
+ printf("error enable channel: %s\n", lttng_get_readable_code(ret));
+ goto enable_fail;
+ }
+
+ printf("Enabling %s kernel event: ", sched_switch.name);
+ if ((ret = lttng_enable_event(handle, &sched_switch, channel.name)) < 0) {
+ printf("error enabling event: %s\n", lttng_get_readable_code(ret));
+ goto enable_fail;
+ }
+ PRINT_OK();
+
+ printf("Enabling %s kernel event: ", sys_enter.name);
+ if ((ret = lttng_enable_event(handle, &sys_enter, channel.name)) < 0) {
+ printf("error enabling event: %s\n", lttng_get_readable_code(ret));
+ goto enable_fail;
+ }
+ PRINT_OK();
+
+ printf("Enabling %s kernel event: ", sys_exit.name);
+ if ((ret = lttng_enable_event(handle, &sys_exit, channel.name)) < 0) {
+ printf("error enabling event: %s\n", lttng_get_readable_code(ret));
+ goto enable_fail;
+ }
+ PRINT_OK();
+
+ printf("Disabling %s kernel event: ", sched_switch.name);
+ if ((ret = lttng_disable_event(handle, sched_switch.name, channel.name)) < 0) {
+ printf("error enabling event: %s\n", lttng_get_readable_code(ret));
+ goto enable_fail;
+ }
+ PRINT_OK();
+
+ printf("Disabling %s kernel event: ", sys_exit.name);
+ if ((ret = lttng_disable_event(handle, sys_exit.name, channel.name)) < 0) {
+ printf("error enabling event: %s\n", lttng_get_readable_code(ret));
+ goto enable_fail;
+ }
+ PRINT_OK();
+
+ printf("Renabling %s kernel event: ", sched_switch.name);
+ if ((ret = lttng_enable_event(handle, &sched_switch, channel.name)) < 0) {
+ printf("error enabling event: %s\n", lttng_get_readable_code(ret));
+ goto enable_fail;
+ }
+ PRINT_OK();
+
+ printf("Renabling %s kernel event: ", sys_exit.name);
+ if ((ret = lttng_enable_event(handle, &sys_exit, channel.name)) < 0) {
+ printf("error enabling event: %s\n", lttng_get_readable_code(ret));
+ goto enable_fail;
+ }
+ PRINT_OK();
+
+ printf("Start tracing: ");
+ if ((ret = lttng_start_tracing(handle)) < 0) {
+ printf("error starting tracing: %s\n", lttng_get_readable_code(ret));
+ goto start_fail;
+ }
+ PRINT_OK();
+
+ sleep(2);
+
+ printf("Stop tracing: ");
+ if ((ret = lttng_stop_tracing(handle)) < 0) {
+ printf("error stopping tracing: %s\n", lttng_get_readable_code(ret));
+ goto stop_fail;
+ }
+ PRINT_OK();
+
+ printf("Destroy tracing session: ");
+ if ((ret = lttng_destroy_session(handle)) < 0) {
+ printf("error destroying session: %s\n", lttng_get_readable_code(ret));
+ }
+ PRINT_OK();
+
+ return 0;
+
+create_fail:
+ assert(ret != 0);
+handle_fail:
+ assert(handle != NULL);
+
+stop_fail:
+start_fail:
+enable_fail:
+ lttng_destroy_session(handle);
+ lttng_destroy_handle(handle);
+
+ return 1;
+}
projects / lttng-tools.git / commitdiff
