| 1 | /* |
| 2 | * lttng-clock-override-test.c |
| 3 | * |
| 4 | * Copyright (c) 2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 5 | * Copyright (c) 2015 Jonthan Rajotte <jonathan.rajotte-julien@efficios.com> |
| 6 | * Based on lttng-clock-override-example.c from LTTng-ust example |
| 7 | * |
| 8 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 9 | * of this software and associated documentation files (the "Software"), to deal |
| 10 | * in the Software without restriction, including without limitation the rights |
| 11 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 12 | * copies of the Software, and to permit persons to whom the Software is |
| 13 | * furnished to do so, subject to the following conditions: |
| 14 | * |
| 15 | * The above copyright notice and this permission notice shall be included in |
| 16 | * all copies or substantial portions of the Software. |
| 17 | * |
| 18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 20 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 21 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 22 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 23 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 24 | * SOFTWARE. |
| 25 | */ |
| 26 | |
| 27 | #include <stdlib.h> |
| 28 | #include <common/compat/time.h> |
| 29 | #include <string.h> |
| 30 | #include <stdio.h> |
| 31 | #include <lttng/ust-clock.h> |
| 32 | |
| 33 | static |
| 34 | uint64_t plugin_read64(void) |
| 35 | { |
| 36 | /* Freeze time */ |
| 37 | return 0; |
| 38 | } |
| 39 | |
| 40 | static |
| 41 | uint64_t plugin_freq(void) |
| 42 | { |
| 43 | return 1000; /* 1KHz clock (very coarse!) */ |
| 44 | } |
| 45 | |
| 46 | static |
| 47 | int plugin_uuid(char *uuid) |
| 48 | { |
| 49 | const char myuuid[] = "83c63deb-7aa4-48fb-abda-946f400d76e6"; |
| 50 | memcpy(uuid, myuuid, LTTNG_UST_UUID_STR_LEN); |
| 51 | return 0; |
| 52 | } |
| 53 | |
| 54 | static |
| 55 | const char *plugin_name(void) |
| 56 | { |
| 57 | return "lttng_test_clock_override"; |
| 58 | } |
| 59 | |
| 60 | static |
| 61 | const char *plugin_description(void) |
| 62 | { |
| 63 | return "Freeze time with 1KHz for regression test"; |
| 64 | } |
| 65 | |
| 66 | void lttng_ust_clock_plugin_init(void) |
| 67 | { |
| 68 | int ret; |
| 69 | |
| 70 | ret = lttng_ust_trace_clock_set_read64_cb(plugin_read64); |
| 71 | if (ret) { |
| 72 | fprintf(stderr, "Error setting clock override read64 callback: %s\n", |
| 73 | strerror(-ret)); |
| 74 | goto error; |
| 75 | } |
| 76 | ret = lttng_ust_trace_clock_set_freq_cb(plugin_freq); |
| 77 | if (ret) { |
| 78 | fprintf(stderr, "Error setting clock override freq callback: %s\n", |
| 79 | strerror(-ret)); |
| 80 | goto error; |
| 81 | } |
| 82 | ret = lttng_ust_trace_clock_set_uuid_cb(plugin_uuid); |
| 83 | if (ret) { |
| 84 | fprintf(stderr, "Error setting clock override uuid callback: %s\n", |
| 85 | strerror(-ret)); |
| 86 | goto error; |
| 87 | } |
| 88 | |
| 89 | ret = lttng_ust_trace_clock_set_name_cb(plugin_name); |
| 90 | if (ret) { |
| 91 | fprintf(stderr, "Error setting clock override name callback: %s\n", |
| 92 | strerror(-ret)); |
| 93 | goto error; |
| 94 | } |
| 95 | |
| 96 | ret = lttng_ust_trace_clock_set_description_cb(plugin_description); |
| 97 | if (ret) { |
| 98 | fprintf(stderr, "Error setting clock override description callback: %s\n", |
| 99 | strerror(-ret)); |
| 100 | goto error; |
| 101 | } |
| 102 | |
| 103 | ret = lttng_ust_enable_trace_clock_override(); |
| 104 | if (ret) { |
| 105 | fprintf(stderr, "Error enabling clock override: %s\n", |
| 106 | strerror(-ret)); |
| 107 | goto error; |
| 108 | } |
| 109 | |
| 110 | return; |
| 111 | |
| 112 | error: |
| 113 | exit(EXIT_FAILURE); |
| 114 | } |