[lttng-tools.git] / tests / unit / test_utils_compat_poll.cpp

/*
 * test_utils_compat_poll.c
 *
 * Unit tests for the compatibility layer of poll/epoll API.
 *
 * Copyright (C) 2019 Yannick Lamarre <ylamarre@efficios.com>
 *
 * SPDX-License-Identifier: GPL-2.0-only
 *
 */

#include <inttypes.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>

#include <tap/tap.h>

#include <common/compat/poll.hpp>
#include <common/readwrite.hpp>
#include <common/pipe.hpp>
#include <common/dynamic-array.hpp>

/* Verification without trashing test order in the child process */
#define childok(e, test, ...) do { \
	if (!(e)) { \
		diag(test, ## __VA_ARGS__); \
		_exit(EXIT_FAILURE); \
	} \
} while(0)

/* For error.h */
int lttng_opt_quiet = 1;
int lttng_opt_verbose;
int lttng_opt_mi;

/*
 * Non-zero 8-bits arbitrary value below 0x7f to ensure no sign extension
 * occurs. Used to verify that the value is properly propagated through the
 * pipe.
 */
#define MAGIC_VALUE ((char) 0x5A)

#ifdef HAVE_EPOLL
#define NUM_TESTS 48
#else
#define NUM_TESTS 47
#endif

#ifdef HAVE_EPOLL
#if defined(HAVE_EPOLL_CREATE1) && defined(EPOLL_CLOEXEC)
#define CLOE_VALUE EPOLL_CLOEXEC
#else
#define CLOE_VALUE FD_CLOEXEC
#endif

static
void test_epoll_compat(void)
{
	/*
	 * Type conversion present to disable warning of anonymous enum from
	 * compiler.
	 */
	ok((int) LTTNG_CLOEXEC == (int) CLOE_VALUE, "epoll's CLOEXEC value");
}
#endif

static void test_alloc(void)
{
	struct lttng_poll_event poll_events;

	lttng_poll_init(&poll_events);

	/* Null pointer */
	ok(lttng_poll_create(NULL, 1, 0) != 0, "Create over NULL pointer fails");
	/* Size 0 */
	ok(lttng_poll_create(&poll_events, 0, 0) != 0, "Create with size 0 fails");
	/* without CLOEXEC */
	ok(lttng_poll_create(&poll_events, 1, 0) == 0, "Create valid poll set succeeds");
	/*
	 * lttng_poll_event structure untested due to incompatibility across
	 * sublayers. lttng_poll_clean cannot be tested. There is no success
	 * criteria. Verify set's max size cases.
	 */
	lttng_poll_clean(&poll_events);
}

/* Tests stuff related to what would be handled with epoll_ctl. */
static void test_add_del(void)
{
	struct lttng_poll_event poll_events;

	lttng_poll_init(&poll_events);
	ok(lttng_poll_add(NULL, 1, LPOLLIN) != 0, "Adding to NULL set fails");
	ok(lttng_poll_add(&poll_events, 1, LPOLLIN) != 0, "Adding to uninitialized structure fails");
	ok(lttng_poll_add(&poll_events, -1, LPOLLIN) != 0, "Adding invalid FD fails");

	ok(lttng_poll_create(&poll_events, 1, 0) == 0, "Create a poll set succeeds");
	ok(LTTNG_POLL_GETNB(&poll_events) == 0, "Set created empty");

	ok(lttng_poll_add(NULL, 1, LPOLLIN) != 0, "Adding to NULL set fails");
	ok(LTTNG_POLL_GETNB(&poll_events) == 0, "Set still empty");
	ok(lttng_poll_add(&poll_events, -1, LPOLLIN) != 0, "Adding invalid FD fails");
	ok(LTTNG_POLL_GETNB(&poll_events) == 0, "Set still empty");

	ok(lttng_poll_add(&poll_events, 1, LPOLLIN) == 0, "Adding valid FD succeeds");
	ok(LTTNG_POLL_GETNB(&poll_events) == 1, "Nb of elements incremented");

	ok(lttng_poll_del(NULL, 1) != 0, "Removing from NULL set fails");
	ok(LTTNG_POLL_GETNB(&poll_events) == 1, "Number of FD in set unchanged");

	ok(lttng_poll_del(&poll_events, -1) != 0, "Removing from negative FD fails");
	ok(LTTNG_POLL_GETNB(&poll_events) == 1, "Number of FD in set unchanged");

	ok(lttng_poll_del(&poll_events, 2) == 0, "Removing invalid FD still succeeds");
	ok(LTTNG_POLL_GETNB(&poll_events) == 1, "Number of elements unchanged");

	ok(lttng_poll_del(&poll_events, 1) == 0, "Removing valid FD succeeds");
	ok(LTTNG_POLL_GETNB(&poll_events) == 0, "Nb of elements decremented");

	ok(lttng_poll_del(&poll_events, 1) != 0, "Removing from empty set fails");
	ok(LTTNG_POLL_GETNB(&poll_events) == 0, "Nb of elements unchanged");

	lttng_poll_clean(&poll_events);
}

static void test_mod_wait(void)
{
	struct lttng_poll_event poll_events;
	struct lttng_poll_event cpoll_events;
	int hupfd[2];
	int infd[2];
	pid_t cpid;
	char rbuf = 0, tbuf = MAGIC_VALUE;
	int wstatus;

	lttng_poll_init(&poll_events);
	lttng_poll_init(&cpoll_events);

	ok(pipe(hupfd) != -1, "pipe function succeeds");
	ok(pipe(infd) != -1, "pipe function succeeds");

	cpid = fork();
	if (cpid == 0) {
		childok(lttng_poll_create(&cpoll_events, 1, 0) == 0, "Create valid poll set succeeds");
		childok(lttng_poll_mod(NULL, infd[0], LPOLLIN) == -1, "lttng_poll_mod with invalid input returns an error");
		childok(lttng_poll_mod(&cpoll_events, infd[0], LPOLLIN) == -1, "lttng_poll_mod with invalid input returns an error");
		childok(lttng_poll_add(&cpoll_events, infd[0], LPOLLHUP) == 0, "Add valid FD succeeds");
		childok(lttng_poll_mod(&cpoll_events, -1, LPOLLIN) == -1, "lttng_poll_mod with invalid input returns an error");
		childok(lttng_poll_mod(&cpoll_events, hupfd[0], LPOLLIN) == 0, "lttng_poll_mod on unincluded FD goes on");
		childok(lttng_poll_mod(&cpoll_events, infd[0], LPOLLIN) == 0, "Modify event type succeeds");
		childok(close(infd[1]) == 0, "Close valid FD succeeds");
		childok(lttng_poll_wait(&cpoll_events, -1) == 1, "Wait on close times out");
		childok(lttng_read(infd[0], &rbuf, 1) == 1, "Data is present in the pipe");
		childok(rbuf == MAGIC_VALUE, "Received data is consistent with transmitted data");
		childok(lttng_poll_del(&cpoll_events, infd[0]) == 0, "Removing valid FD succeeds");
		childok(close(infd[0]) == 0, "Close valid FD succeeds");
		childok(close(hupfd[0]) == 0, "Close valid FD succeeds");
		childok(close(hupfd[1]) == 0, "Close valid FD succeeds");
		lttng_poll_clean(&cpoll_events);
		_exit(EXIT_SUCCESS);
	} else {
		ok(close(hupfd[1]) == 0, "Close valid FD succeeds");
		ok(close(infd[0]) == 0, "Close valid FD succeeds");

		ok(lttng_poll_wait(NULL, -1) == -1, "lttng_poll_wait call with invalid input returns error");

		ok(lttng_poll_create(&poll_events, 1, 0) == 0, "Create valid poll set succeeds");
		ok(lttng_poll_wait(&poll_events, -1) == -1, "lttng_poll_wait call with invalid input returns error");
		ok(lttng_poll_add(&poll_events, hupfd[0], LPOLLHUP) == 0, "Add valid FD succeeds");
		ok(lttng_write(infd[1], &tbuf, 1) == 1, "Write to pipe succeeds");
		ok(lttng_poll_wait(&poll_events, -1) == 1, "Wakes up on one event");
		ok(lttng_poll_del(&poll_events, hupfd[0]) == 0, "Removing valid FD succeeds");
		ok(close(hupfd[0]) == 0, "Close valid FD succeeds");
		ok(close(infd[1]) == 0, "Close valid FD succeeds");
		lttng_poll_clean(&poll_events);
		ok(waitpid(cpid, &wstatus, 0) == cpid, "Wait for child exit");
		ok(WIFEXITED(wstatus) == 1, "Child process exited");
		ok(WEXITSTATUS(wstatus) == EXIT_SUCCESS, "Child process exited with EXIT_SUCCESS");
	}
}

static void destroy_pipe(void *pipe)
{
	lttng_pipe_destroy((lttng_pipe *) pipe);
}

static int run_active_set_combination(unsigned int fd_count,
		unsigned int active_fds_mask)
{
	int ret = 0;
	unsigned int i;
	const unsigned int active_fds_count = __builtin_popcount(active_fds_mask);
	struct lttng_poll_event poll_events;
	struct lttng_dynamic_pointer_array pipes;
	struct lttng_pipe *pipe = NULL;

	lttng_poll_init(&poll_events);
	lttng_dynamic_pointer_array_init(&pipes, destroy_pipe);

	ret = lttng_poll_create(&poll_events, fd_count, 0);
	if (ret) {
		diag("Failed to create poll set for %u file descriptors",
				fd_count);
		goto end;
	}

	for (i = 0; i < fd_count; i++) {
		pipe = lttng_pipe_open(0);

		if (!pipe) {
			diag("Failed to allocate pipe");
			ret = -1;
			goto end;
		}

		ret = lttng_poll_add(&poll_events, lttng_pipe_get_readfd(pipe),
				LPOLLIN);
		if (ret) {
			diag("Failed to add file descriptor to poll set");
			ret = -1;
			goto end;
		}

		ret = lttng_dynamic_pointer_array_add_pointer(&pipes, pipe);
		if (ret) {
			diag("Failed to add pipe to pipes array");
			ret = -1;
			goto end;
		}

		/* Ownership transferred to the pointer array. */
		pipe = NULL;
	}

	/* Write one byte for all active fds that should be active. */
	for (i = 0; i < fd_count; i++) {
		struct lttng_pipe *borrowed_pipe;

		/* Should this fd be made active? */
		if (!(active_fds_mask & (1 << i))) {
			continue;
		}

		borrowed_pipe =
			(lttng_pipe *) lttng_dynamic_pointer_array_get_pointer(
				&pipes, i);

		char c = 'a';
		ret = lttng_pipe_write(
			borrowed_pipe, &c, sizeof(char));
		if (ret != sizeof(char)) {
			diag("Failed to write to pipe");
			ret = -1;
			goto end;
		}
	}

	ret = lttng_poll_wait(&poll_events, 0);
	if (ret != active_fds_count) {
		diag("lttng_poll_wait returned %d, expected %u active file descriptors",
				ret, active_fds_count);
		ret = -1;
		goto end;
	} else {
		/* Success! */
		ret = 0;
	}

end:
	lttng_dynamic_pointer_array_reset(&pipes);
	lttng_poll_clean(&poll_events);
	lttng_pipe_destroy(pipe);
	return ret;
}

static void test_active_set_combinations(unsigned int fd_count)
{
	unsigned int i, all_active_mask = 0;

	/* Do you really want to test more than 4,294,967,295 combinations? */
	LTTNG_ASSERT(fd_count <= 32);

	for (i = 0; i < fd_count; i++) {
		all_active_mask |= (1 << i);
	}

	for (i = 0; i <= all_active_mask; i++) {
		const int ret = run_active_set_combination(fd_count, i);

		if (ret) {
			goto fail;
		}
	}

	pass("Test all combinations of active file descriptors for %u file descriptors", fd_count);
	return;
fail:
	fail("Test all combinations of active file descriptors for %u file descriptors", fd_count);
}

static void test_func_def(void)
{
#ifdef LTTNG_POLL_GETFD
#define PASS_GETFD 1
#else
#define PASS_GETFD 0
#endif

#ifdef LTTNG_POLL_GETEV
#define PASS_GETEV 1
#else
#define PASS_GETEV 0
#endif

#ifdef LTTNG_POLL_GETSZ
#define PASS_GETSZ 1
#else
#define PASS_GETSZ 0
#endif

#ifdef LTTNG_POLL_GET_PREV_FD
#define PASS_GET_PREV_FD 1
#else
#define PASS_GET_PREV_FD 0
#endif

	ok(lttng_poll_reset == lttng_poll_reset, "lttng_poll_reset is defined");
	ok(lttng_poll_init == lttng_poll_init , "lttng_poll_init is defined");
	ok(PASS_GETFD, "GETFD is defined");
	ok(PASS_GETEV, "GETEV is defined");
	ok(PASS_GETSZ, "GETSZ is defined");
	ok(PASS_GET_PREV_FD, "GET_PREV_FD is defined");
}

int main(void)
{
	plan_tests(NUM_TESTS);
#ifdef HAVE_EPOLL
	test_epoll_compat();
#endif
	test_func_def();
	test_alloc();
	test_add_del();
	test_mod_wait();
	test_active_set_combinations(8);
	return exit_status();
}
Commit	Line	Data
b12e3724 YL	1	/*
	2	* test_utils_compat_poll.c
	3	*
	4	* Unit tests for the compatibility layer of poll/epoll API.
	5	*
	6	* Copyright (C) 2019 Yannick Lamarre <ylamarre@efficios.com>
	7	*
9d16b343	8	* SPDX-License-Identifier: GPL-2.0-only
b12e3724	9	*
b12e3724 YL	10	*/
b12e3724 YL	11
b12e3724 YL	12	#include <inttypes.h>
	13	#include <stdio.h>
	14	#include <string.h>
	15	#include <unistd.h>
	16	#include <sys/types.h>
	17	#include <sys/wait.h>
	18
	19	#include <tap/tap.h>
	20
c9e313bc SM	21	#include <common/compat/poll.hpp>
	22	#include <common/readwrite.hpp>
	23	#include <common/pipe.hpp>
	24	#include <common/dynamic-array.hpp>
b12e3724 YL	25
	26	/* Verification without trashing test order in the child process */
	27	#define childok(e, test, ...) do { \
	28	if (!(e)) { \
	29	diag(test, ## __VA_ARGS__); \
	30	_exit(EXIT_FAILURE); \
	31	} \
	32	} while(0)
	33
	34	/* For error.h */
	35	int lttng_opt_quiet = 1;
	36	int lttng_opt_verbose;
	37	int lttng_opt_mi;
	38
41b42b3b JG	39	/*
	40	* Non-zero 8-bits arbitrary value below 0x7f to ensure no sign extension
	41	* occurs. Used to verify that the value is properly propagated through the
	42	* pipe.
	43	*/
	44	#define MAGIC_VALUE ((char) 0x5A)
	45
b12e3724	46	#ifdef HAVE_EPOLL
efeeaae1	47	#define NUM_TESTS 48
b12e3724	48	#else
efeeaae1	49	#define NUM_TESTS 47
b12e3724 YL	50	#endif
	51
	52	#ifdef HAVE_EPOLL
	53	#if defined(HAVE_EPOLL_CREATE1) && defined(EPOLL_CLOEXEC)
	54	#define CLOE_VALUE EPOLL_CLOEXEC
	55	#else
	56	#define CLOE_VALUE FD_CLOEXEC
	57	#endif
	58
f8e06d39	59	static
b12e3724 YL	60	void test_epoll_compat(void)
	61	{
	62	/*
	63	* Type conversion present to disable warning of anonymous enum from
	64	* compiler.
	65	*/
	66	ok((int) LTTNG_CLOEXEC == (int) CLOE_VALUE, "epoll's CLOEXEC value");
	67	}
	68	#endif
	69
f7f52067	70	static void test_alloc(void)
b12e3724 YL	71	{
	72	struct lttng_poll_event poll_events;
	73
	74	lttng_poll_init(&poll_events);
	75
	76	/* Null pointer */
	77	ok(lttng_poll_create(NULL, 1, 0) != 0, "Create over NULL pointer fails");
	78	/* Size 0 */
	79	ok(lttng_poll_create(&poll_events, 0, 0) != 0, "Create with size 0 fails");
	80	/* without CLOEXEC */
	81	ok(lttng_poll_create(&poll_events, 1, 0) == 0, "Create valid poll set succeeds");
	82	/*
	83	* lttng_poll_event structure untested due to incompatibility across
	84	* sublayers. lttng_poll_clean cannot be tested. There is no success
	85	* criteria. Verify set's max size cases.
	86	*/
	87	lttng_poll_clean(&poll_events);
	88	}
	89
	90	/* Tests stuff related to what would be handled with epoll_ctl. */
f7f52067	91	static void test_add_del(void)
b12e3724 YL	92	{
	93	struct lttng_poll_event poll_events;
	94
	95	lttng_poll_init(&poll_events);
	96	ok(lttng_poll_add(NULL, 1, LPOLLIN) != 0, "Adding to NULL set fails");
	97	ok(lttng_poll_add(&poll_events, 1, LPOLLIN) != 0, "Adding to uninitialized structure fails");
	98	ok(lttng_poll_add(&poll_events, -1, LPOLLIN) != 0, "Adding invalid FD fails");
	99
89226f60	100	ok(lttng_poll_create(&poll_events, 1, 0) == 0, "Create a poll set succeeds");
b12e3724 YL	101	ok(LTTNG_POLL_GETNB(&poll_events) == 0, "Set created empty");
	102
	103	ok(lttng_poll_add(NULL, 1, LPOLLIN) != 0, "Adding to NULL set fails");
	104	ok(LTTNG_POLL_GETNB(&poll_events) == 0, "Set still empty");
	105	ok(lttng_poll_add(&poll_events, -1, LPOLLIN) != 0, "Adding invalid FD fails");
	106	ok(LTTNG_POLL_GETNB(&poll_events) == 0, "Set still empty");
	107
	108	ok(lttng_poll_add(&poll_events, 1, LPOLLIN) == 0, "Adding valid FD succeeds");
	109	ok(LTTNG_POLL_GETNB(&poll_events) == 1, "Nb of elements incremented");
	110
	111	ok(lttng_poll_del(NULL, 1) != 0, "Removing from NULL set fails");
	112	ok(LTTNG_POLL_GETNB(&poll_events) == 1, "Number of FD in set unchanged");
	113
	114	ok(lttng_poll_del(&poll_events, -1) != 0, "Removing from negative FD fails");
	115	ok(LTTNG_POLL_GETNB(&poll_events) == 1, "Number of FD in set unchanged");
	116
	117	ok(lttng_poll_del(&poll_events, 2) == 0, "Removing invalid FD still succeeds");
	118	ok(LTTNG_POLL_GETNB(&poll_events) == 1, "Number of elements unchanged");
	119
	120	ok(lttng_poll_del(&poll_events, 1) == 0, "Removing valid FD succeeds");
	121	ok(LTTNG_POLL_GETNB(&poll_events) == 0, "Nb of elements decremented");
	122
	123	ok(lttng_poll_del(&poll_events, 1) != 0, "Removing from empty set fails");
	124	ok(LTTNG_POLL_GETNB(&poll_events) == 0, "Nb of elements unchanged");
	125
	126	lttng_poll_clean(&poll_events);
	127	}
	128
f7f52067	129	static void test_mod_wait(void)
b12e3724 YL	130	{
	131	struct lttng_poll_event poll_events;
	132	struct lttng_poll_event cpoll_events;
	133	int hupfd[2];
	134	int infd[2];
	135	pid_t cpid;
	136	char rbuf = 0, tbuf = MAGIC_VALUE;
	137	int wstatus;
	138
	139	lttng_poll_init(&poll_events);
	140	lttng_poll_init(&cpoll_events);
	141
	142	ok(pipe(hupfd) != -1, "pipe function succeeds");
	143	ok(pipe(infd) != -1, "pipe function succeeds");
	144
	145	cpid = fork();
	146	if (cpid == 0) {
	147	childok(lttng_poll_create(&cpoll_events, 1, 0) == 0, "Create valid poll set succeeds");
	148	childok(lttng_poll_mod(NULL, infd[0], LPOLLIN) == -1, "lttng_poll_mod with invalid input returns an error");
	149	childok(lttng_poll_mod(&cpoll_events, infd[0], LPOLLIN) == -1, "lttng_poll_mod with invalid input returns an error");
	150	childok(lttng_poll_add(&cpoll_events, infd[0], LPOLLHUP) == 0, "Add valid FD succeeds");
	151	childok(lttng_poll_mod(&cpoll_events, -1, LPOLLIN) == -1, "lttng_poll_mod with invalid input returns an error");
	152	childok(lttng_poll_mod(&cpoll_events, hupfd[0], LPOLLIN) == 0, "lttng_poll_mod on unincluded FD goes on");
	153	childok(lttng_poll_mod(&cpoll_events, infd[0], LPOLLIN) == 0, "Modify event type succeeds");
	154	childok(close(infd[1]) == 0, "Close valid FD succeeds");
	155	childok(lttng_poll_wait(&cpoll_events, -1) == 1, "Wait on close times out");
	156	childok(lttng_read(infd[0], &rbuf, 1) == 1, "Data is present in the pipe");
	157	childok(rbuf == MAGIC_VALUE, "Received data is consistent with transmitted data");
	158	childok(lttng_poll_del(&cpoll_events, infd[0]) == 0, "Removing valid FD succeeds");
	159	childok(close(infd[0]) == 0, "Close valid FD succeeds");
	160	childok(close(hupfd[0]) == 0, "Close valid FD succeeds");
	161	childok(close(hupfd[1]) == 0, "Close valid FD succeeds");
	162	lttng_poll_clean(&cpoll_events);
	163	_exit(EXIT_SUCCESS);
	164	} else {
	165	ok(close(hupfd[1]) == 0, "Close valid FD succeeds");
	166	ok(close(infd[0]) == 0, "Close valid FD succeeds");
	167
	168	ok(lttng_poll_wait(NULL, -1) == -1, "lttng_poll_wait call with invalid input returns error");
	169
	170	ok(lttng_poll_create(&poll_events, 1, 0) == 0, "Create valid poll set succeeds");
	171	ok(lttng_poll_wait(&poll_events, -1) == -1, "lttng_poll_wait call with invalid input returns error");
	172	ok(lttng_poll_add(&poll_events, hupfd[0], LPOLLHUP) == 0, "Add valid FD succeeds");
	173	ok(lttng_write(infd[1], &tbuf, 1) == 1, "Write to pipe succeeds");
	174	ok(lttng_poll_wait(&poll_events, -1) == 1, "Wakes up on one event");
	175	ok(lttng_poll_del(&poll_events, hupfd[0]) == 0, "Removing valid FD succeeds");
	176	ok(close(hupfd[0]) == 0, "Close valid FD succeeds");
	177	ok(close(infd[1]) == 0, "Close valid FD succeeds");
	178	lttng_poll_clean(&poll_events);
	179	ok(waitpid(cpid, &wstatus, 0) == cpid, "Wait for child exit");
	180	ok(WIFEXITED(wstatus) == 1, "Child process exited");
	181	ok(WEXITSTATUS(wstatus) == EXIT_SUCCESS, "Child process exited with EXIT_SUCCESS");
	182	}
	183	}
	184
efeeaae1 JG	185	static void destroy_pipe(void *pipe)
efeeaae1 JG	186	{
740da7d5	187	lttng_pipe_destroy((lttng_pipe *) pipe);
efeeaae1 JG	188	}
	189
	190	static int run_active_set_combination(unsigned int fd_count,
	191	unsigned int active_fds_mask)
	192	{
	193	int ret = 0;
	194	unsigned int i;
	195	const unsigned int active_fds_count = __builtin_popcount(active_fds_mask);
	196	struct lttng_poll_event poll_events;
	197	struct lttng_dynamic_pointer_array pipes;
	198	struct lttng_pipe *pipe = NULL;
	199
	200	lttng_poll_init(&poll_events);
	201	lttng_dynamic_pointer_array_init(&pipes, destroy_pipe);
	202
	203	ret = lttng_poll_create(&poll_events, fd_count, 0);
	204	if (ret) {
	205	diag("Failed to create poll set for %u file descriptors",
	206	fd_count);
	207	goto end;
	208	}
	209
	210	for (i = 0; i < fd_count; i++) {
	211	pipe = lttng_pipe_open(0);
	212
	213	if (!pipe) {
	214	diag("Failed to allocate pipe");
	215	ret = -1;
	216	goto end;
	217	}
	218
	219	ret = lttng_poll_add(&poll_events, lttng_pipe_get_readfd(pipe),
	220	LPOLLIN);
	221	if (ret) {
	222	diag("Failed to add file descriptor to poll set");
	223	ret = -1;
	224	goto end;
	225	}
	226
	227	ret = lttng_dynamic_pointer_array_add_pointer(&pipes, pipe);
	228	if (ret) {
	229	diag("Failed to add pipe to pipes array");
	230	ret = -1;
	231	goto end;
	232	}
	233
	234	/* Ownership transferred to the pointer array. */
	235	pipe = NULL;
	236	}
	237
	238	/* Write one byte for all active fds that should be active. */
	239	for (i = 0; i < fd_count; i++) {
c26ada1f	240	struct lttng_pipe *borrowed_pipe;
efeeaae1 JG	241
	242	/* Should this fd be made active? */
	243	if (!(active_fds_mask & (1 << i))) {
	244	continue;
	245	}
	246
740da7d5 SM	247	borrowed_pipe =
740da7d5 SM	248	(lttng_pipe *) lttng_dynamic_pointer_array_get_pointer(
c26ada1f	249	&pipes, i);
efeeaae1	250
740da7d5	251	char c = 'a';
c26ada1f	252	ret = lttng_pipe_write(
740da7d5	253	borrowed_pipe, &c, sizeof(char));
efeeaae1 JG	254	if (ret != sizeof(char)) {
	255	diag("Failed to write to pipe");
	256	ret = -1;
	257	goto end;
	258	}
	259	}
	260
	261	ret = lttng_poll_wait(&poll_events, 0);
	262	if (ret != active_fds_count) {
	263	diag("lttng_poll_wait returned %d, expected %u active file descriptors",
	264	ret, active_fds_count);
	265	ret = -1;
	266	goto end;
	267	} else {
	268	/* Success! */
	269	ret = 0;
	270	}
	271
	272	end:
	273	lttng_dynamic_pointer_array_reset(&pipes);
	274	lttng_poll_clean(&poll_events);
	275	lttng_pipe_destroy(pipe);
	276	return ret;
	277	}
	278
	279	static void test_active_set_combinations(unsigned int fd_count)
	280	{
	281	unsigned int i, all_active_mask = 0;
	282
	283	/* Do you really want to test more than 4,294,967,295 combinations? */
a0377dfe	284	LTTNG_ASSERT(fd_count <= 32);
efeeaae1 JG	285
	286	for (i = 0; i < fd_count; i++) {
	287	all_active_mask \|= (1 << i);
	288	}
	289
	290	for (i = 0; i <= all_active_mask; i++) {
	291	const int ret = run_active_set_combination(fd_count, i);
	292
	293	if (ret) {
	294	goto fail;
	295	}
	296	}
	297
	298	pass("Test all combinations of active file descriptors for %u file descriptors", fd_count);
	299	return;
	300	fail:
	301	fail("Test all combinations of active file descriptors for %u file descriptors", fd_count);
	302	}
	303
f7f52067	304	static void test_func_def(void)
b12e3724 YL	305	{
	306	#ifdef LTTNG_POLL_GETFD
	307	#define PASS_GETFD 1
	308	#else
	309	#define PASS_GETFD 0
	310	#endif
	311
	312	#ifdef LTTNG_POLL_GETEV
	313	#define PASS_GETEV 1
	314	#else
	315	#define PASS_GETEV 0
	316	#endif
	317
	318	#ifdef LTTNG_POLL_GETSZ
	319	#define PASS_GETSZ 1
	320	#else
	321	#define PASS_GETSZ 0
	322	#endif
	323
	324	#ifdef LTTNG_POLL_GET_PREV_FD
	325	#define PASS_GET_PREV_FD 1
	326	#else
	327	#define PASS_GET_PREV_FD 0
	328	#endif
	329
	330	ok(lttng_poll_reset == lttng_poll_reset, "lttng_poll_reset is defined");
	331	ok(lttng_poll_init == lttng_poll_init , "lttng_poll_init is defined");
	332	ok(PASS_GETFD, "GETFD is defined");
	333	ok(PASS_GETEV, "GETEV is defined");
	334	ok(PASS_GETSZ, "GETSZ is defined");
	335	ok(PASS_GET_PREV_FD, "GET_PREV_FD is defined");
	336	}
	337
	338	int main(void)
	339	{
	340	plan_tests(NUM_TESTS);
	341	#ifdef HAVE_EPOLL
	342	test_epoll_compat();
	343	#endif
	344	test_func_def();
	345	test_alloc();
	346	test_add_del();
	347	test_mod_wait();
efeeaae1	348	test_active_set_combinations(8);
b12e3724 YL	349	return exit_status();
b12e3724 YL	350	}