2 * test_utils_compat_poll.c
4 * Unit tests for the compatibility layer of poll/epoll API.
6 * Copyright (C) 2019 Yannick Lamarre <ylamarre@efficios.com>
8 * SPDX-License-Identifier: GPL-2.0-only
17 #include <sys/types.h>
22 #include <common/compat/poll.h>
23 #include <common/readwrite.h>
25 /* Verification without trashing test order in the child process */
26 #define childok(e, test, ...) do { \
28 diag(test, ## __VA_ARGS__); \
29 _exit(EXIT_FAILURE); \
34 int lttng_opt_quiet
= 1;
35 int lttng_opt_verbose
;
39 * Non-zero 8-bits arbitrary value below 0x7f to ensure no sign extension
40 * occurs. Used to verify that the value is properly propagated through the
43 #define MAGIC_VALUE ((char) 0x5A)
52 #if defined(HAVE_EPOLL_CREATE1) && defined(EPOLL_CLOEXEC)
53 #define CLOE_VALUE EPOLL_CLOEXEC
55 #define CLOE_VALUE FD_CLOEXEC
59 void test_epoll_compat(void)
62 * Type conversion present to disable warning of anonymous enum from
65 ok((int) LTTNG_CLOEXEC
== (int) CLOE_VALUE
, "epoll's CLOEXEC value");
69 static void test_alloc(void)
71 struct lttng_poll_event poll_events
;
73 lttng_poll_init(&poll_events
);
76 ok(lttng_poll_create(NULL
, 1, 0) != 0, "Create over NULL pointer fails");
78 ok(lttng_poll_create(&poll_events
, 0, 0) != 0, "Create with size 0 fails");
80 ok(lttng_poll_create(&poll_events
, 1, 0) == 0, "Create valid poll set succeeds");
82 * lttng_poll_event structure untested due to incompatibility across
83 * sublayers. lttng_poll_clean cannot be tested. There is no success
84 * criteria. Verify set's max size cases.
86 lttng_poll_clean(&poll_events
);
89 /* Tests stuff related to what would be handled with epoll_ctl. */
90 static void test_add_del(void)
92 struct lttng_poll_event poll_events
;
94 lttng_poll_init(&poll_events
);
95 ok(lttng_poll_add(NULL
, 1, LPOLLIN
) != 0, "Adding to NULL set fails");
96 ok(lttng_poll_add(&poll_events
, 1, LPOLLIN
) != 0, "Adding to uninitialized structure fails");
97 ok(lttng_poll_add(&poll_events
, -1, LPOLLIN
) != 0, "Adding invalid FD fails");
99 ok(lttng_poll_create(&poll_events
, 1, 0) == 0, "Create a poll set succeeds");
100 ok(LTTNG_POLL_GETNB(&poll_events
) == 0, "Set created empty");
102 ok(lttng_poll_add(NULL
, 1, LPOLLIN
) != 0, "Adding to NULL set fails");
103 ok(LTTNG_POLL_GETNB(&poll_events
) == 0, "Set still empty");
104 ok(lttng_poll_add(&poll_events
, -1, LPOLLIN
) != 0, "Adding invalid FD fails");
105 ok(LTTNG_POLL_GETNB(&poll_events
) == 0, "Set still empty");
107 ok(lttng_poll_add(&poll_events
, 1, LPOLLIN
) == 0, "Adding valid FD succeeds");
108 ok(LTTNG_POLL_GETNB(&poll_events
) == 1, "Nb of elements incremented");
110 ok(lttng_poll_del(NULL
, 1) != 0, "Removing from NULL set fails");
111 ok(LTTNG_POLL_GETNB(&poll_events
) == 1, "Number of FD in set unchanged");
113 ok(lttng_poll_del(&poll_events
, -1) != 0, "Removing from negative FD fails");
114 ok(LTTNG_POLL_GETNB(&poll_events
) == 1, "Number of FD in set unchanged");
116 ok(lttng_poll_del(&poll_events
, 2) == 0, "Removing invalid FD still succeeds");
117 ok(LTTNG_POLL_GETNB(&poll_events
) == 1, "Number of elements unchanged");
119 ok(lttng_poll_del(&poll_events
, 1) == 0, "Removing valid FD succeeds");
120 ok(LTTNG_POLL_GETNB(&poll_events
) == 0, "Nb of elements decremented");
122 ok(lttng_poll_del(&poll_events
, 1) != 0, "Removing from empty set fails");
123 ok(LTTNG_POLL_GETNB(&poll_events
) == 0, "Nb of elements unchanged");
125 lttng_poll_clean(&poll_events
);
128 static void test_mod_wait(void)
130 struct lttng_poll_event poll_events
;
131 struct lttng_poll_event cpoll_events
;
135 char rbuf
= 0, tbuf
= MAGIC_VALUE
;
138 lttng_poll_init(&poll_events
);
139 lttng_poll_init(&cpoll_events
);
141 ok(pipe(hupfd
) != -1, "pipe function succeeds");
142 ok(pipe(infd
) != -1, "pipe function succeeds");
146 childok(lttng_poll_create(&cpoll_events
, 1, 0) == 0, "Create valid poll set succeeds");
147 childok(lttng_poll_mod(NULL
, infd
[0], LPOLLIN
) == -1, "lttng_poll_mod with invalid input returns an error");
148 childok(lttng_poll_mod(&cpoll_events
, infd
[0], LPOLLIN
) == -1, "lttng_poll_mod with invalid input returns an error");
149 childok(lttng_poll_add(&cpoll_events
, infd
[0], LPOLLHUP
) == 0, "Add valid FD succeeds");
150 childok(lttng_poll_mod(&cpoll_events
, -1, LPOLLIN
) == -1, "lttng_poll_mod with invalid input returns an error");
151 childok(lttng_poll_mod(&cpoll_events
, hupfd
[0], LPOLLIN
) == 0, "lttng_poll_mod on unincluded FD goes on");
152 childok(lttng_poll_mod(&cpoll_events
, infd
[0], LPOLLIN
) == 0, "Modify event type succeeds");
153 childok(close(infd
[1]) == 0, "Close valid FD succeeds");
154 childok(lttng_poll_wait(&cpoll_events
, -1) == 1, "Wait on close times out");
155 childok(lttng_read(infd
[0], &rbuf
, 1) == 1, "Data is present in the pipe");
156 childok(rbuf
== MAGIC_VALUE
, "Received data is consistent with transmitted data");
157 childok(lttng_poll_del(&cpoll_events
, infd
[0]) == 0, "Removing valid FD succeeds");
158 childok(close(infd
[0]) == 0, "Close valid FD succeeds");
159 childok(close(hupfd
[0]) == 0, "Close valid FD succeeds");
160 childok(close(hupfd
[1]) == 0, "Close valid FD succeeds");
161 lttng_poll_clean(&cpoll_events
);
164 ok(close(hupfd
[1]) == 0, "Close valid FD succeeds");
165 ok(close(infd
[0]) == 0, "Close valid FD succeeds");
167 ok(lttng_poll_wait(NULL
, -1) == -1, "lttng_poll_wait call with invalid input returns error");
169 ok(lttng_poll_create(&poll_events
, 1, 0) == 0, "Create valid poll set succeeds");
170 ok(lttng_poll_wait(&poll_events
, -1) == -1, "lttng_poll_wait call with invalid input returns error");
171 ok(lttng_poll_add(&poll_events
, hupfd
[0], LPOLLHUP
) == 0, "Add valid FD succeeds");
172 ok(lttng_write(infd
[1], &tbuf
, 1) == 1, "Write to pipe succeeds");
173 ok(lttng_poll_wait(&poll_events
, -1) == 1, "Wakes up on one event");
174 ok(lttng_poll_del(&poll_events
, hupfd
[0]) == 0, "Removing valid FD succeeds");
175 ok(close(hupfd
[0]) == 0, "Close valid FD succeeds");
176 ok(close(infd
[1]) == 0, "Close valid FD succeeds");
177 lttng_poll_clean(&poll_events
);
178 ok(waitpid(cpid
, &wstatus
, 0) == cpid
, "Wait for child exit");
179 ok(WIFEXITED(wstatus
) == 1, "Child process exited");
180 ok(WEXITSTATUS(wstatus
) == EXIT_SUCCESS
, "Child process exited with EXIT_SUCCESS");
184 static void test_func_def(void)
186 #ifdef LTTNG_POLL_GETFD
192 #ifdef LTTNG_POLL_GETEV
198 #ifdef LTTNG_POLL_GETSZ
204 #ifdef LTTNG_POLL_GET_PREV_FD
205 #define PASS_GET_PREV_FD 1
207 #define PASS_GET_PREV_FD 0
210 ok(lttng_poll_reset
== lttng_poll_reset
, "lttng_poll_reset is defined");
211 ok(lttng_poll_init
== lttng_poll_init
, "lttng_poll_init is defined");
212 ok(PASS_GETFD
, "GETFD is defined");
213 ok(PASS_GETEV
, "GETEV is defined");
214 ok(PASS_GETSZ
, "GETSZ is defined");
215 ok(PASS_GET_PREV_FD
, "GET_PREV_FD is defined");
220 plan_tests(NUM_TESTS
);
228 return exit_status();