Fix: test_kernel_data dereference of null pointer
[lttng-tools.git] / tests / unit / test_kernel_data.c
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 #include <assert.h>
20 #include <errno.h>
21 #include <stdio.h>
22 #include <stdlib.h>
23 #include <string.h>
24 #include <unistd.h>
25 #include <time.h>
26
27 #include <bin/lttng-sessiond/trace-kernel.h>
28 #include <common/defaults.h>
29
30 #include <tap/tap.h>
31
32 #define RANDOM_STRING_LEN 11
33
34 /* Number of TAP tests in this file */
35 #define NUM_TESTS 11
36
37 /* For error.h */
38 int lttng_opt_quiet = 1;
39 int lttng_opt_verbose;
40 int lttng_opt_mi;
41
42 int ust_consumerd32_fd;
43 int ust_consumerd64_fd;
44
45 static const char alphanum[] =
46 "0123456789"
47 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
48 "abcdefghijklmnopqrstuvwxyz";
49
50 static struct ltt_kernel_session *kern;
51 static char random_string[RANDOM_STRING_LEN];
52
53 /*
54 * Return random string of 10 characters.
55 * Not thread-safe.
56 */
57 static char *get_random_string(void)
58 {
59 int i;
60
61 for (i = 0; i < RANDOM_STRING_LEN - 1; i++) {
62 random_string[i] = alphanum[rand() % (sizeof(alphanum) - 1)];
63 }
64
65 random_string[RANDOM_STRING_LEN - 1] = '\0';
66
67 return random_string;
68 }
69
70 static void test_create_one_kernel_session(void)
71 {
72 kern = trace_kernel_create_session();
73 ok(kern != NULL, "Create kernel session");
74
75 if (!kern) {
76 skip(1, "Kernel session is null");
77 return;
78 }
79 ok(kern->fd == -1 &&
80 kern->metadata_stream_fd == -1 &&
81 kern->consumer_fds_sent == 0 &&
82 kern->channel_count == 0 &&
83 kern->stream_count_global == 0 &&
84 kern->metadata == NULL,
85 "Validate kernel session");
86 }
87
88 static void test_create_kernel_metadata(void)
89 {
90 assert(kern != NULL);
91
92 kern->metadata = trace_kernel_create_metadata();
93 ok(kern->metadata != NULL, "Create kernel metadata");
94
95 ok(kern->metadata->fd == -1 &&
96 kern->metadata->conf != NULL &&
97 kern->metadata->conf->attr.overwrite
98 == DEFAULT_CHANNEL_OVERWRITE &&
99 kern->metadata->conf->attr.subbuf_size
100 == default_get_metadata_subbuf_size() &&
101 kern->metadata->conf->attr.num_subbuf
102 == DEFAULT_METADATA_SUBBUF_NUM &&
103 kern->metadata->conf->attr.switch_timer_interval
104 == DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER &&
105 kern->metadata->conf->attr.read_timer_interval
106 == DEFAULT_KERNEL_CHANNEL_READ_TIMER &&
107 kern->metadata->conf->attr.output
108 == DEFAULT_KERNEL_CHANNEL_OUTPUT,
109 "Validate kernel session metadata");
110
111 trace_kernel_destroy_metadata(kern->metadata);
112 }
113
114 static void test_create_kernel_channel(void)
115 {
116 struct ltt_kernel_channel *chan;
117 struct lttng_channel attr;
118
119 memset(&attr, 0, sizeof(attr));
120
121 chan = trace_kernel_create_channel(&attr);
122 ok(chan != NULL, "Create kernel channel");
123
124 if (!chan) {
125 skip(1, "Channel is null");
126 return;
127 }
128
129 ok(chan->fd == -1 &&
130 chan->enabled == 1 &&
131 chan->stream_count == 0 &&
132 chan->channel->attr.overwrite == attr.attr.overwrite,
133 "Validate kernel channel");
134
135 /* Init list in order to avoid sefaults from cds_list_del */
136 CDS_INIT_LIST_HEAD(&chan->list);
137 trace_kernel_destroy_channel(chan);
138 }
139
140 static void test_create_kernel_event(void)
141 {
142 struct ltt_kernel_event *event;
143 struct lttng_event ev;
144
145 memset(&ev, 0, sizeof(ev));
146 ok(!lttng_strncpy(ev.name, get_random_string(),
147 LTTNG_KERNEL_SYM_NAME_LEN),
148 "Validate string length");
149 ev.type = LTTNG_EVENT_TRACEPOINT;
150 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
151
152 event = trace_kernel_create_event(&ev, NULL, NULL);
153 ok(event != NULL, "Create kernel event");
154
155 if (!event) {
156 skip(1, "Event is null");
157 return;
158 }
159
160 ok(event->fd == -1 &&
161 event->enabled == 1 &&
162 event->event->instrumentation == LTTNG_KERNEL_TRACEPOINT &&
163 strlen(event->event->name),
164 "Validate kernel event");
165
166 /* Init list in order to avoid sefaults from cds_list_del */
167 CDS_INIT_LIST_HEAD(&event->list);
168 trace_kernel_destroy_event(event);
169 }
170
171 static void test_create_kernel_stream(void)
172 {
173 struct ltt_kernel_stream *stream;
174
175 stream = trace_kernel_create_stream("stream1", 0);
176 ok(stream != NULL, "Create kernel stream");
177
178 if (!stream) {
179 skip(1, "Stream is null");
180 return;
181 }
182
183 ok(stream->fd == -1 &&
184 stream->state == 0,
185 "Validate kernel stream");
186
187 /* Init list in order to avoid sefaults from cds_list_del */
188 CDS_INIT_LIST_HEAD(&stream->list);
189 trace_kernel_destroy_stream(stream);
190 }
191
192 int main(int argc, char **argv)
193 {
194 plan_tests(NUM_TESTS);
195
196 diag("Kernel data structure unit test");
197
198 test_create_one_kernel_session();
199 test_create_kernel_metadata();
200 test_create_kernel_channel();
201 test_create_kernel_event();
202 test_create_kernel_stream();
203
204 /* Success */
205 return 0;
206 }
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