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c60ddab6 DG |
1 | /* |
2 | * Copyright (c) 2011 David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * as published by the Free Software Foundation; only version 2 | |
7 | * of the License. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along | |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
17 | */ | |
18 | ||
19 | #define _GNU_SOURCE | |
20 | #include <assert.h> | |
21 | #include <errno.h> | |
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
24 | #include <string.h> | |
25 | #include <unistd.h> | |
26 | #include <time.h> | |
27 | ||
28 | #include <lttng/lttng.h> | |
29 | ||
355f483d | 30 | #include "utils.h" |
c60ddab6 | 31 | |
97e19046 | 32 | int lttng_opt_quiet; |
d2641a83 | 33 | |
c60ddab6 DG |
34 | int main(int argc, char **argv) |
35 | { | |
441c16a7 MD |
36 | struct lttng_handle *handle = NULL; |
37 | struct lttng_domain dom; | |
c60ddab6 DG |
38 | struct lttng_channel channel; |
39 | struct lttng_event sched_switch; | |
9928e7b7 DG |
40 | struct lttng_event sched_process_exit; |
41 | struct lttng_event sched_process_free; | |
d3e8f6bb | 42 | char *session_name = "kernel_event_basic"; |
441c16a7 MD |
43 | int ret = 0; |
44 | ||
45 | memset(&dom, 0, sizeof(dom)); | |
46 | memset(&channel, 0, sizeof(channel)); | |
47 | memset(&sched_switch, 0, sizeof(sched_switch)); | |
48 | memset(&sched_process_exit, 0, sizeof(sched_process_exit)); | |
49 | memset(&sched_process_free, 0, sizeof(sched_process_free)); | |
c60ddab6 | 50 | |
441c16a7 | 51 | dom.type = LTTNG_DOMAIN_KERNEL; |
c60ddab6 DG |
52 | |
53 | strcpy(channel.name, "mychan"); | |
54 | channel.attr.overwrite = 0; | |
55 | channel.attr.subbuf_size = 4096; | |
56 | channel.attr.num_subbuf = 8; | |
57 | channel.attr.switch_timer_interval = 0; | |
58 | channel.attr.read_timer_interval = 200; | |
59 | channel.attr.output = LTTNG_EVENT_SPLICE; | |
60 | ||
61 | strcpy(sched_switch.name, "sched_switch"); | |
62 | sched_switch.type = LTTNG_EVENT_TRACEPOINT; | |
441c16a7 | 63 | sched_switch.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; |
c60ddab6 | 64 | |
9928e7b7 DG |
65 | strcpy(sched_process_exit.name, "sched_process_exit"); |
66 | sched_process_exit.type = LTTNG_EVENT_TRACEPOINT; | |
441c16a7 | 67 | sched_process_exit.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; |
c60ddab6 | 68 | |
9928e7b7 DG |
69 | strcpy(sched_process_free.name, "sched_process_free"); |
70 | sched_process_free.type = LTTNG_EVENT_TRACEPOINT; | |
441c16a7 | 71 | sched_process_free.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; |
c60ddab6 DG |
72 | |
73 | printf("\nTesting tracing kernel events:\n"); | |
74 | printf("-----------\n"); | |
75 | /* Check if root */ | |
76 | if (getuid() != 0) { | |
77 | printf("Root access is needed.\nPlease run 'sudo make check' -- Aborting!\n"); | |
78 | return 0; | |
79 | } | |
80 | ||
81 | if (argc < 2) { | |
82 | printf("Missing session trace path\n"); | |
83 | return 1; | |
84 | } | |
85 | ||
86 | printf("Creating tracing session (%s): ", argv[1]); | |
f973f94b MD |
87 | if ((ret = lttng_create_session(session_name, argv[1])) < 0) { |
88 | printf("error creating the session : %s\n", lttng_strerror(ret)); | |
c60ddab6 | 89 | goto create_fail; |
f973f94b | 90 | } |
c60ddab6 DG |
91 | PRINT_OK(); |
92 | ||
93 | printf("Creating session handle: "); | |
94 | if ((handle = lttng_create_handle(session_name, &dom)) == NULL) { | |
9a745bc7 | 95 | printf("error creating handle: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
96 | goto handle_fail; |
97 | } | |
98 | PRINT_OK(); | |
99 | ||
100 | printf("Enabling %s kernel channel: ", channel.name); | |
101 | if ((ret = lttng_enable_channel(handle, &channel)) < 0) { | |
9a745bc7 | 102 | printf("error enable channel: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
103 | goto enable_fail; |
104 | } | |
105 | ||
106 | printf("Enabling %s kernel event: ", sched_switch.name); | |
f973f94b MD |
107 | if ((ret = lttng_enable_event(handle, &sched_switch, channel.name)) < 0) { |
108 | printf("error enabling event: %s\n", lttng_strerror(ret)); | |
c60ddab6 | 109 | goto enable_fail; |
f973f94b | 110 | } |
c60ddab6 DG |
111 | PRINT_OK(); |
112 | ||
9928e7b7 DG |
113 | printf("Enabling %s kernel event: ", sched_process_exit.name); |
114 | if ((ret = lttng_enable_event(handle, &sched_process_exit, channel.name)) < 0) { | |
9a745bc7 | 115 | printf("error enabling event: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
116 | goto enable_fail; |
117 | } | |
118 | PRINT_OK(); | |
119 | ||
9928e7b7 DG |
120 | printf("Enabling %s kernel event: ", sched_process_free.name); |
121 | if ((ret = lttng_enable_event(handle, &sched_process_free, channel.name)) < 0) { | |
9a745bc7 | 122 | printf("error enabling event: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
123 | goto enable_fail; |
124 | } | |
125 | PRINT_OK(); | |
126 | ||
127 | printf("Disabling %s kernel event: ", sched_switch.name); | |
128 | if ((ret = lttng_disable_event(handle, sched_switch.name, channel.name)) < 0) { | |
9a745bc7 | 129 | printf("error enabling event: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
130 | goto enable_fail; |
131 | } | |
132 | PRINT_OK(); | |
133 | ||
9928e7b7 DG |
134 | printf("Disabling %s kernel event: ", sched_process_free.name); |
135 | if ((ret = lttng_disable_event(handle, sched_process_free.name, channel.name)) < 0) { | |
9a745bc7 | 136 | printf("error enabling event: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
137 | goto enable_fail; |
138 | } | |
139 | PRINT_OK(); | |
140 | ||
141 | printf("Renabling %s kernel event: ", sched_switch.name); | |
142 | if ((ret = lttng_enable_event(handle, &sched_switch, channel.name)) < 0) { | |
9a745bc7 | 143 | printf("error enabling event: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
144 | goto enable_fail; |
145 | } | |
146 | PRINT_OK(); | |
147 | ||
9928e7b7 DG |
148 | printf("Renabling %s kernel event: ", sched_process_free.name); |
149 | if ((ret = lttng_enable_event(handle, &sched_process_free, channel.name)) < 0) { | |
9a745bc7 | 150 | printf("error enabling event: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
151 | goto enable_fail; |
152 | } | |
153 | PRINT_OK(); | |
154 | ||
155 | printf("Start tracing: "); | |
6a4f824d | 156 | if ((ret = lttng_start_tracing(session_name)) < 0) { |
9a745bc7 | 157 | printf("error starting tracing: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
158 | goto start_fail; |
159 | } | |
160 | PRINT_OK(); | |
161 | ||
162 | sleep(2); | |
163 | ||
164 | printf("Stop tracing: "); | |
6a4f824d | 165 | if ((ret = lttng_stop_tracing(session_name)) < 0) { |
9a745bc7 | 166 | printf("error stopping tracing: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
167 | goto stop_fail; |
168 | } | |
169 | PRINT_OK(); | |
170 | ||
171 | printf("Destroy tracing session: "); | |
843f5df9 | 172 | if ((ret = lttng_destroy_session(session_name)) < 0) { |
9a745bc7 | 173 | printf("error destroying session: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
174 | } |
175 | PRINT_OK(); | |
176 | ||
177 | return 0; | |
178 | ||
c60ddab6 DG |
179 | handle_fail: |
180 | assert(handle != NULL); | |
bff9a49f MD |
181 | create_fail: |
182 | assert(ret != 0); | |
c60ddab6 DG |
183 | |
184 | stop_fail: | |
185 | start_fail: | |
186 | enable_fail: | |
843f5df9 | 187 | lttng_destroy_session(session_name); |
c60ddab6 DG |
188 | lttng_destroy_handle(handle); |
189 | ||
f973f94b | 190 | return 1; |
c60ddab6 | 191 | } |