| 1 | /* |
| 2 | * base_client.c |
| 3 | * |
| 4 | * Base client application for testing of LTTng trigger API |
| 5 | * |
| 6 | * Copyright 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com> |
| 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 <stdio.h> |
| 28 | #include <stdbool.h> |
| 29 | #include <string.h> |
| 30 | #include <unistd.h> |
| 31 | #include <inttypes.h> |
| 32 | #include <assert.h> |
| 33 | |
| 34 | #include <lttng/action/action.h> |
| 35 | #include <lttng/action/start-session.h> |
| 36 | #include <lttng/action/notify.h> |
| 37 | #include <lttng/condition/condition.h> |
| 38 | #include <lttng/condition/event-rule.h> |
| 39 | #include <lttng/event-rule/tracepoint.h> |
| 40 | #include <lttng/domain.h> |
| 41 | #include <lttng/trigger/trigger.h> |
| 42 | #include <lttng/lttng-error.h> |
| 43 | #include <lttng/endpoint.h> |
| 44 | #include <lttng/notification/channel.h> |
| 45 | #include <lttng/notification/notification.h> |
| 46 | |
| 47 | const char *session_name = NULL; |
| 48 | enum lttng_domain_type domain_type = LTTNG_DOMAIN_NONE; |
| 49 | const char *pattern = NULL; |
| 50 | |
| 51 | int parse_arguments(char **argv) { |
| 52 | const char *domain_type_string = NULL; |
| 53 | |
| 54 | session_name = argv[1]; |
| 55 | domain_type_string = argv[2]; |
| 56 | pattern = argv[3]; |
| 57 | |
| 58 | /* Parse arguments */ |
| 59 | /* Domain type */ |
| 60 | if (!strcasecmp("LTTNG_DOMAIN_UST", domain_type_string)) { |
| 61 | domain_type = LTTNG_DOMAIN_UST; |
| 62 | } |
| 63 | if (!strcasecmp("LTTNG_DOMAIN_KERNEL", domain_type_string)) { |
| 64 | domain_type = LTTNG_DOMAIN_KERNEL; |
| 65 | } |
| 66 | if (!strcasecmp("LTTNG_DOMAIN_JUL", domain_type_string)) { |
| 67 | domain_type = LTTNG_DOMAIN_JUL; |
| 68 | } |
| 69 | if (!strcasecmp("LTTNG_DOMAIN_PYTHON", domain_type_string)) { |
| 70 | domain_type = LTTNG_DOMAIN_PYTHON; |
| 71 | } |
| 72 | if (!strcasecmp("LTTNG_DOMAIN_LOG4J", domain_type_string)) { |
| 73 | domain_type = LTTNG_DOMAIN_LOG4J; |
| 74 | } |
| 75 | if (domain_type == LTTNG_DOMAIN_NONE) { |
| 76 | printf("error: Unknown domain type\n"); |
| 77 | goto error; |
| 78 | } |
| 79 | |
| 80 | return 0; |
| 81 | error: |
| 82 | return 1; |
| 83 | } |
| 84 | |
| 85 | int main(int argc, char **argv) |
| 86 | { |
| 87 | int ret = 0; |
| 88 | struct lttng_condition *condition = NULL; |
| 89 | |
| 90 | enum lttng_event_rule_status event_rule_status; |
| 91 | struct lttng_event_rule *event_rule = NULL; |
| 92 | |
| 93 | enum lttng_action_status action_status; |
| 94 | struct lttng_action *action = NULL; |
| 95 | |
| 96 | enum lttng_notification_channel_status nc_status; |
| 97 | struct lttng_notification_channel *notification_channel = NULL; |
| 98 | |
| 99 | const char* exclusions[] = { "sample_component:message2"}; |
| 100 | |
| 101 | struct lttng_trigger *trigger = NULL; |
| 102 | |
| 103 | if (argc < 4) { |
| 104 | printf("error: Missing arguments for tests\n"); |
| 105 | ret = 1; |
| 106 | goto end; |
| 107 | } |
| 108 | |
| 109 | ret = parse_arguments(argv); |
| 110 | if (ret) { |
| 111 | printf("error: Could not parse arguments\n"); |
| 112 | goto end; |
| 113 | } |
| 114 | |
| 115 | event_rule = lttng_event_rule_tracepoint_create(domain_type); |
| 116 | if (!event_rule) { |
| 117 | printf("error: Could not create condition object\n"); |
| 118 | ret = 1; |
| 119 | goto end; |
| 120 | } |
| 121 | |
| 122 | event_rule_status = lttng_event_rule_tracepoint_set_pattern(event_rule, pattern); |
| 123 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 124 | printf("error: Could not set pattern\n"); |
| 125 | ret = 1; |
| 126 | goto end; |
| 127 | } |
| 128 | |
| 129 | event_rule_status = lttng_event_rule_tracepoint_set_filter(event_rule, "message=='Hello World'"); |
| 130 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 131 | printf("error: Could not set pattern\n"); |
| 132 | ret = 1; |
| 133 | goto end; |
| 134 | } |
| 135 | |
| 136 | event_rule_status = lttng_event_rule_tracepoint_set_exclusions(event_rule, 1, exclusions); |
| 137 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
| 138 | printf("error: Could not set exclusions\n"); |
| 139 | ret = 1; |
| 140 | goto end; |
| 141 | } |
| 142 | |
| 143 | condition = lttng_condition_event_rule_create(event_rule); |
| 144 | if (!condition) { |
| 145 | printf("error: Could not create condition\n"); |
| 146 | ret = 1; |
| 147 | goto end; |
| 148 | } |
| 149 | /* Ownership was passed to condition */ |
| 150 | event_rule = NULL; |
| 151 | |
| 152 | action = lttng_action_notify_create(); |
| 153 | if (!action) { |
| 154 | printf("error: Could not create action notify\n"); |
| 155 | ret = 1; |
| 156 | goto end; |
| 157 | } |
| 158 | |
| 159 | trigger = lttng_trigger_create(condition, action); |
| 160 | if (!trigger) { |
| 161 | printf("error: Could not create trigger\n"); |
| 162 | ret = 1; |
| 163 | goto end; |
| 164 | } |
| 165 | |
| 166 | ret = lttng_register_trigger(trigger); |
| 167 | |
| 168 | notification_channel = lttng_notification_channel_create( |
| 169 | lttng_session_daemon_notification_endpoint); |
| 170 | if (!notification_channel) { |
| 171 | printf("error: Could not create notification channel\n"); |
| 172 | ret = 1; |
| 173 | goto end; |
| 174 | } |
| 175 | /* |
| 176 | * An equivalent trigger might already be registered if an other app |
| 177 | * registered an equivalent trigger. |
| 178 | */ |
| 179 | if (ret < 0 && ret != -LTTNG_ERR_TRIGGER_EXISTS) { |
| 180 | printf("error: %s\n", lttng_strerror(ret)); |
| 181 | ret = 1; |
| 182 | goto end; |
| 183 | } |
| 184 | |
| 185 | nc_status = lttng_notification_channel_subscribe(notification_channel, condition); |
| 186 | if (nc_status != LTTNG_NOTIFICATION_CHANNEL_STATUS_OK) { |
| 187 | printf("error: Could not subscribe\n"); |
| 188 | ret = 1; |
| 189 | goto end; |
| 190 | } |
| 191 | |
| 192 | for (;;) { |
| 193 | struct lttng_notification *notification; |
| 194 | enum lttng_notification_channel_status status; |
| 195 | const struct lttng_evaluation *notification_evaluation; |
| 196 | const struct lttng_condition *notification_condition; |
| 197 | const char *name; |
| 198 | |
| 199 | /* Receive the next notification. */ |
| 200 | status = lttng_notification_channel_get_next_notification( |
| 201 | notification_channel, |
| 202 | ¬ification); |
| 203 | |
| 204 | switch (status) { |
| 205 | case LTTNG_NOTIFICATION_CHANNEL_STATUS_OK: |
| 206 | break; |
| 207 | case LTTNG_NOTIFICATION_CHANNEL_STATUS_NOTIFICATIONS_DROPPED: |
| 208 | ret = 1; |
| 209 | printf("error: No drop should be observed during this test app\n"); |
| 210 | goto end; |
| 211 | case LTTNG_NOTIFICATION_CHANNEL_STATUS_CLOSED: |
| 212 | /* |
| 213 | * The notification channel has been closed by the |
| 214 | * session daemon. This is typically caused by a session |
| 215 | * daemon shutting down (cleanly or because of a crash). |
| 216 | */ |
| 217 | printf("error: Notification channel was closed\n"); |
| 218 | ret = 1; |
| 219 | goto end; |
| 220 | default: |
| 221 | /* Unhandled conditions / errors. */ |
| 222 | printf("error: Unknown notification channel status\n"); |
| 223 | ret = 1; |
| 224 | goto end; |
| 225 | } |
| 226 | |
| 227 | notification_condition = lttng_notification_get_condition(notification); |
| 228 | notification_evaluation = lttng_notification_get_evaluation(notification); |
| 229 | switch (lttng_evaluation_get_type(notification_evaluation)) { |
| 230 | case LTTNG_CONDITION_TYPE_EVENT_RULE_HIT: |
| 231 | lttng_evaluation_event_rule_get_trigger_name(notification_evaluation, &name); |
| 232 | printf("Received nootification from trigger \"%s\"\n", name); |
| 233 | break; |
| 234 | default: |
| 235 | printf("error: Wrong notification evaluation type \n"); |
| 236 | break; |
| 237 | |
| 238 | } |
| 239 | |
| 240 | lttng_notification_destroy(notification); |
| 241 | } |
| 242 | end: |
| 243 | if (trigger) { |
| 244 | lttng_unregister_trigger(trigger); |
| 245 | } |
| 246 | lttng_event_rule_destroy(event_rule); |
| 247 | lttng_trigger_destroy(trigger); |
| 248 | lttng_condition_destroy(condition); |
| 249 | lttng_action_destroy(action); |
| 250 | printf("exit: %d\n", ret); |
| 251 | return ret; |
| 252 | } |