| 1 | /* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) |
| 2 | * |
| 3 | * lttng-clock-plugin-test.c |
| 4 | * |
| 5 | * Copyright (C) 2014, 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 6 | */ |
| 7 | |
| 8 | #include <linux/module.h> |
| 9 | #include <linux/ktime.h> |
| 10 | #include <linux/hrtimer.h> |
| 11 | #include <linux/time.h> |
| 12 | |
| 13 | #include <lttng-tracer.h> |
| 14 | #include <lttng-clock.h> /* From lttng-modules */ |
| 15 | |
| 16 | static u64 trace_clock_read64_example(void) |
| 17 | { |
| 18 | /* Freeze time. */ |
| 19 | return 0; |
| 20 | } |
| 21 | |
| 22 | static u64 trace_clock_freq_example(void) |
| 23 | { |
| 24 | return 1000; /* 1KHz */ |
| 25 | } |
| 26 | |
| 27 | static int trace_clock_uuid_example(char *uuid) |
| 28 | { |
| 29 | const char myuuid[] = "83c63deb-7aa4-48fb-abda-946f400d76e6"; |
| 30 | memcpy(uuid, myuuid, LTTNG_MODULES_UUID_STR_LEN); |
| 31 | return 0; |
| 32 | } |
| 33 | |
| 34 | static const char *trace_clock_name_example(void) |
| 35 | { |
| 36 | return "lttng_test_clock_override"; |
| 37 | } |
| 38 | |
| 39 | static const char *trace_clock_description_example(void) |
| 40 | { |
| 41 | return "Freeze time with 1KHz for regression test"; |
| 42 | } |
| 43 | |
| 44 | static |
| 45 | struct lttng_trace_clock ltc = { |
| 46 | .read64 = trace_clock_read64_example, |
| 47 | .freq = trace_clock_freq_example, |
| 48 | .uuid = trace_clock_uuid_example, |
| 49 | .name = trace_clock_name_example, |
| 50 | .description = trace_clock_description_example, |
| 51 | }; |
| 52 | |
| 53 | static __init |
| 54 | int lttng_clock_plugin_init(void) |
| 55 | { |
| 56 | return lttng_clock_register_plugin(<c, THIS_MODULE); |
| 57 | } |
| 58 | fs_initcall(lttng_clock_plugin_init); |
| 59 | |
| 60 | static __exit |
| 61 | void lttng_clock_plugin_exit(void) |
| 62 | { |
| 63 | lttng_clock_unregister_plugin(<c, THIS_MODULE); |
| 64 | } |
| 65 | module_exit(lttng_clock_plugin_exit); |
| 66 | |
| 67 | MODULE_LICENSE("GPL and additional rights"); |
| 68 | MODULE_AUTHOR("Mathieu Desnoyers <mathieu.desnoyers@efficios.com>"); |
| 69 | MODULE_DESCRIPTION("LTTng Clock Plugin Example"); |
| 70 | MODULE_VERSION(__stringify(LTTNG_MODULES_MAJOR_VERSION) "." |
| 71 | __stringify(LTTNG_MODULES_MINOR_VERSION) "." |
| 72 | __stringify(LTTNG_MODULES_PATCHLEVEL_VERSION) |
| 73 | LTTNG_MODULES_EXTRAVERSION); |