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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 | { | |
34 | struct lttng_handle *handle = NULL; | |
35 | struct lttng_domain dom; | |
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; | |
c60ddab6 DG |
40 | |
41 | int ret = 0; | |
42 | ||
43 | char *session_name = "kernel_event"; | |
44 | ||
45 | dom.type = LTTNG_DOMAIN_KERNEL; | |
46 | ||
47 | strcpy(channel.name, "mychan"); | |
48 | channel.attr.overwrite = 0; | |
49 | channel.attr.subbuf_size = 4096; | |
50 | channel.attr.num_subbuf = 8; | |
51 | channel.attr.switch_timer_interval = 0; | |
52 | channel.attr.read_timer_interval = 200; | |
53 | channel.attr.output = LTTNG_EVENT_SPLICE; | |
54 | ||
55 | strcpy(sched_switch.name, "sched_switch"); | |
56 | sched_switch.type = LTTNG_EVENT_TRACEPOINT; | |
57 | ||
9928e7b7 DG |
58 | strcpy(sched_process_exit.name, "sched_process_exit"); |
59 | sched_process_exit.type = LTTNG_EVENT_TRACEPOINT; | |
c60ddab6 | 60 | |
9928e7b7 DG |
61 | strcpy(sched_process_free.name, "sched_process_free"); |
62 | sched_process_free.type = LTTNG_EVENT_TRACEPOINT; | |
c60ddab6 DG |
63 | |
64 | printf("\nTesting tracing kernel events:\n"); | |
65 | printf("-----------\n"); | |
66 | /* Check if root */ | |
67 | if (getuid() != 0) { | |
68 | printf("Root access is needed.\nPlease run 'sudo make check' -- Aborting!\n"); | |
69 | return 0; | |
70 | } | |
71 | ||
72 | if (argc < 2) { | |
73 | printf("Missing session trace path\n"); | |
74 | return 1; | |
75 | } | |
76 | ||
77 | printf("Creating tracing session (%s): ", argv[1]); | |
78 | if ((ret = lttng_create_session(session_name, argv[1])) < 0) { | |
9a745bc7 | 79 | printf("error creating the session : %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
80 | goto create_fail; |
81 | } | |
82 | PRINT_OK(); | |
83 | ||
84 | printf("Creating session handle: "); | |
85 | if ((handle = lttng_create_handle(session_name, &dom)) == NULL) { | |
9a745bc7 | 86 | printf("error creating handle: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
87 | goto handle_fail; |
88 | } | |
89 | PRINT_OK(); | |
90 | ||
91 | printf("Enabling %s kernel channel: ", channel.name); | |
92 | if ((ret = lttng_enable_channel(handle, &channel)) < 0) { | |
9a745bc7 | 93 | printf("error enable channel: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
94 | goto enable_fail; |
95 | } | |
96 | ||
97 | printf("Enabling %s kernel event: ", sched_switch.name); | |
98 | if ((ret = lttng_enable_event(handle, &sched_switch, channel.name)) < 0) { | |
9a745bc7 | 99 | printf("error enabling event: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
100 | goto enable_fail; |
101 | } | |
102 | PRINT_OK(); | |
103 | ||
9928e7b7 DG |
104 | printf("Enabling %s kernel event: ", sched_process_exit.name); |
105 | if ((ret = lttng_enable_event(handle, &sched_process_exit, channel.name)) < 0) { | |
9a745bc7 | 106 | printf("error enabling event: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
107 | goto enable_fail; |
108 | } | |
109 | PRINT_OK(); | |
110 | ||
9928e7b7 DG |
111 | printf("Enabling %s kernel event: ", sched_process_free.name); |
112 | if ((ret = lttng_enable_event(handle, &sched_process_free, 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 | ||
118 | printf("Disabling %s kernel event: ", sched_switch.name); | |
119 | if ((ret = lttng_disable_event(handle, sched_switch.name, 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 | ||
9928e7b7 DG |
125 | printf("Disabling %s kernel event: ", sched_process_free.name); |
126 | if ((ret = lttng_disable_event(handle, sched_process_free.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 | ||
132 | printf("Renabling %s kernel event: ", sched_switch.name); | |
133 | if ((ret = lttng_enable_event(handle, &sched_switch, 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 | ||
9928e7b7 DG |
139 | printf("Renabling %s kernel event: ", sched_process_free.name); |
140 | if ((ret = lttng_enable_event(handle, &sched_process_free, 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 | ||
146 | printf("Start tracing: "); | |
147 | if ((ret = lttng_start_tracing(handle)) < 0) { | |
9a745bc7 | 148 | printf("error starting tracing: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
149 | goto start_fail; |
150 | } | |
151 | PRINT_OK(); | |
152 | ||
153 | sleep(2); | |
154 | ||
155 | printf("Stop tracing: "); | |
156 | if ((ret = lttng_stop_tracing(handle)) < 0) { | |
9a745bc7 | 157 | printf("error stopping tracing: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
158 | goto stop_fail; |
159 | } | |
160 | PRINT_OK(); | |
161 | ||
162 | printf("Destroy tracing session: "); | |
163 | if ((ret = lttng_destroy_session(handle)) < 0) { | |
9a745bc7 | 164 | printf("error destroying session: %s\n", lttng_strerror(ret)); |
c60ddab6 DG |
165 | } |
166 | PRINT_OK(); | |
167 | ||
168 | return 0; | |
169 | ||
170 | create_fail: | |
171 | assert(ret != 0); | |
172 | handle_fail: | |
173 | assert(handle != NULL); | |
174 | ||
175 | stop_fail: | |
176 | start_fail: | |
177 | enable_fail: | |
178 | lttng_destroy_session(handle); | |
179 | lttng_destroy_handle(handle); | |
180 | ||
181 | return 1; | |
182 | } |