Test clock override plugin

[lttng-modules.git] / tests / clock-plugin / lttng-clock-plugin-test.c

diff --git a/tests/clock-plugin/lttng-clock-plugin-test.c b/tests/clock-plugin/lttng-clock-plugin-test.c
new file mode 100644 (file)
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+++ b/tests/clock-plugin/lttng-clock-plugin-test.c
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+/*
+ * lttng-clock-plugin-test.c
+ *
+ * Copyright (C) 2014, 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; only
+ * version 2.1 of the License.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/module.h>
+#include <linux/ktime.h>
+#include <linux/hrtimer.h>
+#include <linux/time.h>
+
+#include <lttng-clock.h>       /* From lttng-modules */
+
+static u64 trace_clock_read64_example(void)
+{
+       /* Freeze time. */
+       return 0;
+}
+
+static u64 trace_clock_freq_example(void)
+{
+       return 1000;    /* 1KHz */
+}
+
+static int trace_clock_uuid_example(char *uuid)
+{
+       const char myuuid[] = "83c63deb-7aa4-48fb-abda-946f400d76e6";
+       memcpy(uuid, myuuid, LTTNG_MODULES_UUID_STR_LEN);
+       return 0;
+}
+
+static const char *trace_clock_name_example(void)
+{
+       return "lttng_test_clock_override";
+}
+
+static const char *trace_clock_description_example(void)
+{
+       return "Freeze time with 1KHz for regression test";
+}
+
+static
+struct lttng_trace_clock ltc = {
+       .read64 = trace_clock_read64_example,
+       .freq = trace_clock_freq_example,
+       .uuid = trace_clock_uuid_example,
+       .name = trace_clock_name_example,
+       .description = trace_clock_description_example,
+};
+
+static __init
+int lttng_clock_plugin_init(void)
+{
+       return lttng_clock_register_plugin(&ltc, THIS_MODULE);
+}
+module_init(lttng_clock_plugin_init);
+
+static __exit
+void lttng_clock_plugin_exit(void)
+{
+       lttng_clock_unregister_plugin(&ltc, THIS_MODULE);
+}
+module_exit(lttng_clock_plugin_exit);
+
+MODULE_LICENSE("GPL and additional rights");
+MODULE_AUTHOR("Mathieu Desnoyers <mathieu.desnoyers@efficios.com>");
+MODULE_DESCRIPTION("LTTng Clock Plugin Example");