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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 | ||
30 | #include "../utils.h" | |
31 | ||
32 | int main(int argc, char **argv) | |
33 | { | |
441c16a7 MD |
34 | struct lttng_handle *handle = NULL; |
35 | struct lttng_domain dom; | |
c60ddab6 DG |
36 | struct lttng_channel channel; |
37 | struct lttng_event sched_switch; | |
9928e7b7 DG |
38 | struct lttng_event sched_process_exit; |
39 | struct lttng_event sched_process_free; | |
d3e8f6bb | 40 | char *session_name = "kernel_event_basic"; |
441c16a7 MD |
41 | int ret = 0; |
42 | ||
43 | memset(&dom, 0, sizeof(dom)); | |
44 | memset(&channel, 0, sizeof(channel)); | |
45 | memset(&sched_switch, 0, sizeof(sched_switch)); | |
46 | memset(&sched_process_exit, 0, sizeof(sched_process_exit)); | |
47 | memset(&sched_process_free, 0, sizeof(sched_process_free)); | |
c60ddab6 | 48 | |
441c16a7 | 49 | dom.type = LTTNG_DOMAIN_KERNEL; |
c60ddab6 DG |
50 | |
51 | strcpy(channel.name, "mychan"); | |
52 | channel.attr.overwrite = 0; | |
53 | channel.attr.subbuf_size = 4096; | |
54 | channel.attr.num_subbuf = 8; | |
55 | channel.attr.switch_timer_interval = 0; | |
56 | channel.attr.read_timer_interval = 200; | |
57 | channel.attr.output = LTTNG_EVENT_SPLICE; | |
58 | ||
59 | strcpy(sched_switch.name, "sched_switch"); | |
60 | sched_switch.type = LTTNG_EVENT_TRACEPOINT; | |
441c16a7 | 61 | sched_switch.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; |
c60ddab6 | 62 | |
9928e7b7 DG |
63 | strcpy(sched_process_exit.name, "sched_process_exit"); |
64 | sched_process_exit.type = LTTNG_EVENT_TRACEPOINT; | |
441c16a7 | 65 | sched_process_exit.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; |
c60ddab6 | 66 | |
9928e7b7 DG |
67 | strcpy(sched_process_free.name, "sched_process_free"); |
68 | sched_process_free.type = LTTNG_EVENT_TRACEPOINT; | |
441c16a7 | 69 | sched_process_free.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; |
c60ddab6 DG |
70 | |
71 | printf("\nTesting tracing kernel events:\n"); | |
72 | printf("-----------\n"); | |
73 | /* Check if root */ | |
74 | if (getuid() != 0) { | |
75 | printf("Root access is needed.\nPlease run 'sudo make check' -- Aborting!\n"); | |
76 | return 0; | |
77 | } | |
78 | ||
79 | if (argc < 2) { | |
80 | printf("Missing session trace path\n"); | |
81 | return 1; | |
82 | } | |
83 | ||
84 | printf("Creating tracing session (%s): ", argv[1]); | |
f973f94b MD |
85 | if ((ret = lttng_create_session(session_name, argv[1])) < 0) { |
86 | printf("error creating the session : %s\n", lttng_strerror(ret)); | |
c60ddab6 | 87 | goto create_fail; |
f973f94b | 88 | } |
c60ddab6 DG |
89 | PRINT_OK(); |
90 | ||
91 | printf("Creating session handle: "); | |
92 | if ((handle = lttng_create_handle(session_name, &dom)) == NULL) { | |
9a745bc7 | 93 | printf("error creating handle: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
94 | goto handle_fail; |
95 | } | |
96 | PRINT_OK(); | |
97 | ||
98 | printf("Enabling %s kernel channel: ", channel.name); | |
99 | if ((ret = lttng_enable_channel(handle, &channel)) < 0) { | |
9a745bc7 | 100 | printf("error enable channel: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
101 | goto enable_fail; |
102 | } | |
103 | ||
104 | printf("Enabling %s kernel event: ", sched_switch.name); | |
f973f94b MD |
105 | if ((ret = lttng_enable_event(handle, &sched_switch, channel.name)) < 0) { |
106 | printf("error enabling event: %s\n", lttng_strerror(ret)); | |
c60ddab6 | 107 | goto enable_fail; |
f973f94b | 108 | } |
c60ddab6 DG |
109 | PRINT_OK(); |
110 | ||
9928e7b7 DG |
111 | printf("Enabling %s kernel event: ", sched_process_exit.name); |
112 | if ((ret = lttng_enable_event(handle, &sched_process_exit, channel.name)) < 0) { | |
9a745bc7 | 113 | printf("error enabling event: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
114 | goto enable_fail; |
115 | } | |
116 | PRINT_OK(); | |
117 | ||
9928e7b7 DG |
118 | printf("Enabling %s kernel event: ", sched_process_free.name); |
119 | if ((ret = lttng_enable_event(handle, &sched_process_free, channel.name)) < 0) { | |
9a745bc7 | 120 | printf("error enabling event: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
121 | goto enable_fail; |
122 | } | |
123 | PRINT_OK(); | |
124 | ||
125 | printf("Disabling %s kernel event: ", sched_switch.name); | |
126 | if ((ret = lttng_disable_event(handle, sched_switch.name, channel.name)) < 0) { | |
9a745bc7 | 127 | printf("error enabling event: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
128 | goto enable_fail; |
129 | } | |
130 | PRINT_OK(); | |
131 | ||
9928e7b7 DG |
132 | printf("Disabling %s kernel event: ", sched_process_free.name); |
133 | if ((ret = lttng_disable_event(handle, sched_process_free.name, channel.name)) < 0) { | |
9a745bc7 | 134 | printf("error enabling event: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
135 | goto enable_fail; |
136 | } | |
137 | PRINT_OK(); | |
138 | ||
139 | printf("Renabling %s kernel event: ", sched_switch.name); | |
140 | if ((ret = lttng_enable_event(handle, &sched_switch, channel.name)) < 0) { | |
9a745bc7 | 141 | printf("error enabling event: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
142 | goto enable_fail; |
143 | } | |
144 | PRINT_OK(); | |
145 | ||
9928e7b7 DG |
146 | printf("Renabling %s kernel event: ", sched_process_free.name); |
147 | if ((ret = lttng_enable_event(handle, &sched_process_free, channel.name)) < 0) { | |
9a745bc7 | 148 | printf("error enabling event: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
149 | goto enable_fail; |
150 | } | |
151 | PRINT_OK(); | |
152 | ||
153 | printf("Start tracing: "); | |
6a4f824d | 154 | if ((ret = lttng_start_tracing(session_name)) < 0) { |
9a745bc7 | 155 | printf("error starting tracing: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
156 | goto start_fail; |
157 | } | |
158 | PRINT_OK(); | |
159 | ||
160 | sleep(2); | |
161 | ||
162 | printf("Stop tracing: "); | |
6a4f824d | 163 | if ((ret = lttng_stop_tracing(session_name)) < 0) { |
9a745bc7 | 164 | printf("error stopping tracing: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
165 | goto stop_fail; |
166 | } | |
167 | PRINT_OK(); | |
168 | ||
169 | printf("Destroy tracing session: "); | |
843f5df9 | 170 | if ((ret = lttng_destroy_session(session_name)) < 0) { |
9a745bc7 | 171 | printf("error destroying session: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
172 | } |
173 | PRINT_OK(); | |
174 | ||
175 | return 0; | |
176 | ||
177 | create_fail: | |
178 | assert(ret != 0); | |
179 | handle_fail: | |
180 | assert(handle != NULL); | |
181 | ||
182 | stop_fail: | |
183 | start_fail: | |
184 | enable_fail: | |
843f5df9 | 185 | lttng_destroy_session(session_name); |
c60ddab6 DG |
186 | lttng_destroy_handle(handle); |
187 | ||
f973f94b | 188 | return 1; |
c60ddab6 | 189 | } |