[people/arne_f/kernel.git] / tools / perf / tests / dso-data.c

// SPDX-License-Identifier: GPL-2.0
#include <dirent.h>
#include <stdlib.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <api/fs/fs.h>
#include "util.h"
#include "machine.h"
#include "symbol.h"
#include "tests.h"
#include "debug.h"

static char *test_file(int size)
{
#define TEMPL "/tmp/perf-test-XXXXXX"
	static char buf_templ[sizeof(TEMPL)];
	char *templ = buf_templ;
	int fd, i;
	unsigned char *buf;

	strcpy(buf_templ, TEMPL);
#undef TEMPL

	fd = mkstemp(templ);
	if (fd < 0) {
		perror("mkstemp failed");
		return NULL;
	}

	buf = malloc(size);
	if (!buf) {
		close(fd);
		return NULL;
	}

	for (i = 0; i < size; i++)
		buf[i] = (unsigned char) ((int) i % 10);

	if (size != write(fd, buf, size))
		templ = NULL;

	free(buf);
	close(fd);
	return templ;
}

#define TEST_FILE_SIZE (DSO__DATA_CACHE_SIZE * 20)

struct test_data_offset {
	off_t offset;
	u8 data[10];
	int size;
};

struct test_data_offset offsets[] = {
	/* Fill first cache page. */
	{
		.offset = 10,
		.data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
		.size   = 10,
	},
	/* Read first cache page. */
	{
		.offset = 10,
		.data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
		.size   = 10,
	},
	/* Fill cache boundary pages. */
	{
		.offset = DSO__DATA_CACHE_SIZE - DSO__DATA_CACHE_SIZE % 10,
		.data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
		.size   = 10,
	},
	/* Read cache boundary pages. */
	{
		.offset = DSO__DATA_CACHE_SIZE - DSO__DATA_CACHE_SIZE % 10,
		.data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
		.size   = 10,
	},
	/* Fill final cache page. */
	{
		.offset = TEST_FILE_SIZE - 10,
		.data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
		.size   = 10,
	},
	/* Read final cache page. */
	{
		.offset = TEST_FILE_SIZE - 10,
		.data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
		.size   = 10,
	},
	/* Read final cache page. */
	{
		.offset = TEST_FILE_SIZE - 3,
		.data   = { 7, 8, 9, 0, 0, 0, 0, 0, 0, 0 },
		.size   = 3,
	},
};

/* move it from util/dso.c for compatibility */
static int dso__data_fd(struct dso *dso, struct machine *machine)
{
	int fd = dso__data_get_fd(dso, machine);

	if (fd >= 0)
		dso__data_put_fd(dso);

	return fd;
}

int test__dso_data(struct test *test __maybe_unused, int subtest __maybe_unused)
{
	struct machine machine;
	struct dso *dso;
	char *file = test_file(TEST_FILE_SIZE);
	size_t i;

	TEST_ASSERT_VAL("No test file", file);

	memset(&machine, 0, sizeof(machine));

	dso = dso__new((const char *)file);

	TEST_ASSERT_VAL("Failed to access to dso",
			dso__data_fd(dso, &machine) >= 0);

	/* Basic 10 bytes tests. */
	for (i = 0; i < ARRAY_SIZE(offsets); i++) {
		struct test_data_offset *data = &offsets[i];
		ssize_t size;
		u8 buf[10];

		memset(buf, 0, 10);
		size = dso__data_read_offset(dso, &machine, data->offset,
				     buf, 10);

		TEST_ASSERT_VAL("Wrong size", size == data->size);
		TEST_ASSERT_VAL("Wrong data", !memcmp(buf, data->data, 10));
	}

	/* Read cross multiple cache pages. */
	{
		ssize_t size;
		int c;
		u8 *buf;

		buf = malloc(TEST_FILE_SIZE);
		TEST_ASSERT_VAL("ENOMEM\n", buf);

		/* First iteration to fill caches, second one to read them. */
		for (c = 0; c < 2; c++) {
			memset(buf, 0, TEST_FILE_SIZE);
			size = dso__data_read_offset(dso, &machine, 10,
						     buf, TEST_FILE_SIZE);

			TEST_ASSERT_VAL("Wrong size",
				size == (TEST_FILE_SIZE - 10));

			for (i = 0; i < (size_t)size; i++)
				TEST_ASSERT_VAL("Wrong data",
					buf[i] == (i % 10));
		}

		free(buf);
	}

	dso__put(dso);
	unlink(file);
	return 0;
}

static long open_files_cnt(void)
{
	char path[PATH_MAX];
	struct dirent *dent;
	DIR *dir;
	long nr = 0;

	scnprintf(path, PATH_MAX, "%s/self/fd", procfs__mountpoint());
	pr_debug("fd path: %s\n", path);

	dir = opendir(path);
	TEST_ASSERT_VAL("failed to open fd directory", dir);

	while ((dent = readdir(dir)) != NULL) {
		if (!strcmp(dent->d_name, ".") ||
		    !strcmp(dent->d_name, ".."))
			continue;

		nr++;
	}

	closedir(dir);
	return nr - 1;
}

static struct dso **dsos;

static int dsos__create(int cnt, int size)
{
	int i;

	dsos = malloc(sizeof(*dsos) * cnt);
	TEST_ASSERT_VAL("failed to alloc dsos array", dsos);

	for (i = 0; i < cnt; i++) {
		char *file;

		file = test_file(size);
		TEST_ASSERT_VAL("failed to get dso file", file);

		dsos[i] = dso__new(file);
		TEST_ASSERT_VAL("failed to get dso", dsos[i]);
	}

	return 0;
}

static void dsos__delete(int cnt)
{
	int i;

	for (i = 0; i < cnt; i++) {
		struct dso *dso = dsos[i];

		unlink(dso->name);
		dso__put(dso);
	}

	free(dsos);
}

static int set_fd_limit(int n)
{
	struct rlimit rlim;

	if (getrlimit(RLIMIT_NOFILE, &rlim))
		return -1;

	pr_debug("file limit %ld, new %d\n", (long) rlim.rlim_cur, n);

	rlim.rlim_cur = n;
	return setrlimit(RLIMIT_NOFILE, &rlim);
}

int test__dso_data_cache(struct test *test __maybe_unused, int subtest __maybe_unused)
{
	struct machine machine;
	long nr_end, nr = open_files_cnt();
	int dso_cnt, limit, i, fd;

	/* Rest the internal dso open counter limit. */
	reset_fd_limit();

	memset(&machine, 0, sizeof(machine));

	/* set as system limit */
	limit = nr * 4;
	TEST_ASSERT_VAL("failed to set file limit", !set_fd_limit(limit));

	/* and this is now our dso open FDs limit */
	dso_cnt = limit / 2;
	TEST_ASSERT_VAL("failed to create dsos\n",
		!dsos__create(dso_cnt, TEST_FILE_SIZE));

	for (i = 0; i < (dso_cnt - 1); i++) {
		struct dso *dso = dsos[i];

		/*
		 * Open dsos via dso__data_fd(), it opens the data
		 * file and keep it open (unless open file limit).
		 */
		fd = dso__data_fd(dso, &machine);
		TEST_ASSERT_VAL("failed to get fd", fd > 0);

		if (i % 2) {
			#define BUFSIZE 10
			u8 buf[BUFSIZE];
			ssize_t n;

			n = dso__data_read_offset(dso, &machine, 0, buf, BUFSIZE);
			TEST_ASSERT_VAL("failed to read dso", n == BUFSIZE);
		}
	}

	/* verify the first one is already open */
	TEST_ASSERT_VAL("dsos[0] is not open", dsos[0]->data.fd != -1);

	/* open +1 dso to reach the allowed limit */
	fd = dso__data_fd(dsos[i], &machine);
	TEST_ASSERT_VAL("failed to get fd", fd > 0);

	/* should force the first one to be closed */
	TEST_ASSERT_VAL("failed to close dsos[0]", dsos[0]->data.fd == -1);

	/* cleanup everything */
	dsos__delete(dso_cnt);

	/* Make sure we did not leak any file descriptor. */
	nr_end = open_files_cnt();
	pr_debug("nr start %ld, nr stop %ld\n", nr, nr_end);
	TEST_ASSERT_VAL("failed leadking files", nr == nr_end);
	return 0;
}

int test__dso_data_reopen(struct test *test __maybe_unused, int subtest __maybe_unused)
{
	struct machine machine;
	long nr_end, nr = open_files_cnt();
	int fd, fd_extra;

#define dso_0 (dsos[0])
#define dso_1 (dsos[1])
#define dso_2 (dsos[2])

	/* Rest the internal dso open counter limit. */
	reset_fd_limit();

	memset(&machine, 0, sizeof(machine));

	/*
	 * Test scenario:
	 * - create 3 dso objects
	 * - set process file descriptor limit to current
	 *   files count + 3
	 * - test that the first dso gets closed when we
	 *   reach the files count limit
	 */

	/* Make sure we are able to open 3 fds anyway */
	TEST_ASSERT_VAL("failed to set file limit",
			!set_fd_limit((nr + 3)));

	TEST_ASSERT_VAL("failed to create dsos\n", !dsos__create(3, TEST_FILE_SIZE));

	/* open dso_0 */
	fd = dso__data_fd(dso_0, &machine);
	TEST_ASSERT_VAL("failed to get fd", fd > 0);

	/* open dso_1 */
	fd = dso__data_fd(dso_1, &machine);
	TEST_ASSERT_VAL("failed to get fd", fd > 0);

	/*
	 * open extra file descriptor and we just
	 * reached the files count limit
	 */
	fd_extra = open("/dev/null", O_RDONLY);
	TEST_ASSERT_VAL("failed to open extra fd", fd_extra > 0);

	/* open dso_2 */
	fd = dso__data_fd(dso_2, &machine);
	TEST_ASSERT_VAL("failed to get fd", fd > 0);

	/*
	 * dso_0 should get closed, because we reached
	 * the file descriptor limit
	 */
	TEST_ASSERT_VAL("failed to close dso_0", dso_0->data.fd == -1);

	/* open dso_0 */
	fd = dso__data_fd(dso_0, &machine);
	TEST_ASSERT_VAL("failed to get fd", fd > 0);

	/*
	 * dso_1 should get closed, because we reached
	 * the file descriptor limit
	 */
	TEST_ASSERT_VAL("failed to close dso_1", dso_1->data.fd == -1);

	/* cleanup everything */
	close(fd_extra);
	dsos__delete(3);

	/* Make sure we did not leak any file descriptor. */
	nr_end = open_files_cnt();
	pr_debug("nr start %ld, nr stop %ld\n", nr, nr_end);
	TEST_ASSERT_VAL("failed leadking files", nr == nr_end);
	return 0;
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
76b31a29	2	#include <dirent.h>
f7add556	3	#include <stdlib.h>
877a7a11	4	#include <linux/kernel.h>
d944c4ee	5	#include <linux/types.h>
f7add556 JO	6	#include <sys/stat.h>
	7	#include <fcntl.h>
	8	#include <string.h>
4ebbcb84 JO	9	#include <sys/time.h>
	10	#include <sys/resource.h>
	11	#include <api/fs/fs.h>
	12	#include "util.h"
69d2591a	13	#include "machine.h"
f7add556	14	#include "symbol.h"
c81251e8	15	#include "tests.h"
84f5d36f	16	#include "debug.h"
f7add556	17
f7add556 JO	18	static char *test_file(int size)
f7add556 JO	19	{
822c45db JO	20	#define TEMPL "/tmp/perf-test-XXXXXX"
822c45db JO	21	static char buf_templ[sizeof(TEMPL)];
f7add556 JO	22	char *templ = buf_templ;
	23	int fd, i;
	24	unsigned char *buf;
	25
822c45db JO	26	strcpy(buf_templ, TEMPL);
	27	#undef TEMPL
	28
7b45f21c	29	fd = mkstemp(templ);
f95e0818 JO	30	if (fd < 0) {
	31	perror("mkstemp failed");
	32	return NULL;
	33	}
f7add556 JO	34
	35	buf = malloc(size);
	36	if (!buf) {
	37	close(fd);
	38	return NULL;
	39	}
	40
	41	for (i = 0; i < size; i++)
	42	buf[i] = (unsigned char) ((int) i % 10);
	43
	44	if (size != write(fd, buf, size))
	45	templ = NULL;
	46
1df9297c	47	free(buf);
f7add556 JO	48	close(fd);
	49	return templ;
	50	}
	51
	52	#define TEST_FILE_SIZE (DSO__DATA_CACHE_SIZE * 20)
	53
	54	struct test_data_offset {
	55	off_t offset;
	56	u8 data[10];
	57	int size;
	58	};
	59
	60	struct test_data_offset offsets[] = {
	61	/* Fill first cache page. */
	62	{
	63	.offset = 10,
	64	.data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
	65	.size = 10,
	66	},
	67	/* Read first cache page. */
	68	{
	69	.offset = 10,
	70	.data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
	71	.size = 10,
	72	},
	73	/* Fill cache boundary pages. */
	74	{
	75	.offset = DSO__DATA_CACHE_SIZE - DSO__DATA_CACHE_SIZE % 10,
	76	.data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
	77	.size = 10,
	78	},
	79	/* Read cache boundary pages. */
	80	{
	81	.offset = DSO__DATA_CACHE_SIZE - DSO__DATA_CACHE_SIZE % 10,
	82	.data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
	83	.size = 10,
	84	},
	85	/* Fill final cache page. */
	86	{
	87	.offset = TEST_FILE_SIZE - 10,
	88	.data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
	89	.size = 10,
	90	},
	91	/* Read final cache page. */
	92	{
	93	.offset = TEST_FILE_SIZE - 10,
	94	.data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
	95	.size = 10,
	96	},
	97	/* Read final cache page. */
	98	{
	99	.offset = TEST_FILE_SIZE - 3,
	100	.data = { 7, 8, 9, 0, 0, 0, 0, 0, 0, 0 },
	101	.size = 3,
	102	},
	103	};
	104
4bb11d01 NK	105	/* move it from util/dso.c for compatibility */
	106	static int dso__data_fd(struct dso dso, struct machine machine)
	107	{
	108	int fd = dso__data_get_fd(dso, machine);
	109
	110	if (fd >= 0)
	111	dso__data_put_fd(dso);
	112
	113	return fd;
	114	}
	115
81f17c90	116	int test__dso_data(struct test *test __maybe_unused, int subtest __maybe_unused)
f7add556 JO	117	{
	118	struct machine machine;
	119	struct dso *dso;
	120	char *file = test_file(TEST_FILE_SIZE);
	121	size_t i;
	122
	123	TEST_ASSERT_VAL("No test file", file);
	124
	125	memset(&machine, 0, sizeof(machine));
	126
	127	dso = dso__new((const char *)file);
	128
63d3c6f3 NK	129	TEST_ASSERT_VAL("Failed to access to dso",
	130	dso__data_fd(dso, &machine) >= 0);
	131
f7add556 JO	132	/* Basic 10 bytes tests. */
	133	for (i = 0; i < ARRAY_SIZE(offsets); i++) {
	134	struct test_data_offset *data = &offsets[i];
	135	ssize_t size;
	136	u8 buf[10];
	137
	138	memset(buf, 0, 10);
	139	size = dso__data_read_offset(dso, &machine, data->offset,
	140	buf, 10);
	141
	142	TEST_ASSERT_VAL("Wrong size", size == data->size);
	143	TEST_ASSERT_VAL("Wrong data", !memcmp(buf, data->data, 10));
	144	}
	145
	146	/* Read cross multiple cache pages. */
	147	{
	148	ssize_t size;
	149	int c;
	150	u8 *buf;
	151
	152	buf = malloc(TEST_FILE_SIZE);
	153	TEST_ASSERT_VAL("ENOMEM\n", buf);
	154
	155	/* First iteration to fill caches, second one to read them. */
	156	for (c = 0; c < 2; c++) {
	157	memset(buf, 0, TEST_FILE_SIZE);
	158	size = dso__data_read_offset(dso, &machine, 10,
	159	buf, TEST_FILE_SIZE);
	160
	161	TEST_ASSERT_VAL("Wrong size",
	162	size == (TEST_FILE_SIZE - 10));
	163
	164	for (i = 0; i < (size_t)size; i++)
	165	TEST_ASSERT_VAL("Wrong data",
	166	buf[i] == (i % 10));
	167	}
	168
	169	free(buf);
	170	}
	171
d3a7c489	172	dso__put(dso);
f7add556 JO	173	unlink(file);
	174	return 0;
	175	}
4ebbcb84 JO	176
	177	static long open_files_cnt(void)
	178	{
	179	char path[PATH_MAX];
	180	struct dirent *dent;
	181	DIR *dir;
	182	long nr = 0;
	183
	184	scnprintf(path, PATH_MAX, "%s/self/fd", procfs__mountpoint());
	185	pr_debug("fd path: %s\n", path);
	186
	187	dir = opendir(path);
	188	TEST_ASSERT_VAL("failed to open fd directory", dir);
	189
	190	while ((dent = readdir(dir)) != NULL) {
	191	if (!strcmp(dent->d_name, ".") \|\|
	192	!strcmp(dent->d_name, ".."))
	193	continue;
	194
	195	nr++;
	196	}
	197
	198	closedir(dir);
	199	return nr - 1;
	200	}
	201
	202	static struct dso **dsos;
	203
	204	static int dsos__create(int cnt, int size)
	205	{
	206	int i;
	207
ca7ce82a	208	dsos = malloc(sizeof(dsos) cnt);
4ebbcb84 JO	209	TEST_ASSERT_VAL("failed to alloc dsos array", dsos);
	210
	211	for (i = 0; i < cnt; i++) {
	212	char *file;
	213
	214	file = test_file(size);
	215	TEST_ASSERT_VAL("failed to get dso file", file);
	216
	217	dsos[i] = dso__new(file);
	218	TEST_ASSERT_VAL("failed to get dso", dsos[i]);
	219	}
	220
	221	return 0;
	222	}
	223
	224	static void dsos__delete(int cnt)
	225	{
	226	int i;
	227
	228	for (i = 0; i < cnt; i++) {
	229	struct dso *dso = dsos[i];
	230
	231	unlink(dso->name);
d3a7c489	232	dso__put(dso);
4ebbcb84 JO	233	}
	234
	235	free(dsos);
	236	}
	237
	238	static int set_fd_limit(int n)
	239	{
	240	struct rlimit rlim;
	241
	242	if (getrlimit(RLIMIT_NOFILE, &rlim))
	243	return -1;
	244
	245	pr_debug("file limit %ld, new %d\n", (long) rlim.rlim_cur, n);
	246
	247	rlim.rlim_cur = n;
	248	return setrlimit(RLIMIT_NOFILE, &rlim);
	249	}
	250
81f17c90	251	int test__dso_data_cache(struct test *test __maybe_unused, int subtest __maybe_unused)
4ebbcb84 JO	252	{
	253	struct machine machine;
	254	long nr_end, nr = open_files_cnt();
	255	int dso_cnt, limit, i, fd;
	256
f3069249 JO	257	/* Rest the internal dso open counter limit. */
	258	reset_fd_limit();
	259
4ebbcb84 JO	260	memset(&machine, 0, sizeof(machine));
	261
	262	/* set as system limit */
	263	limit = nr * 4;
	264	TEST_ASSERT_VAL("failed to set file limit", !set_fd_limit(limit));
	265
66af43d5 NK	266	/* and this is now our dso open FDs limit */
66af43d5 NK	267	dso_cnt = limit / 2;
4ebbcb84 JO	268	TEST_ASSERT_VAL("failed to create dsos\n",
	269	!dsos__create(dso_cnt, TEST_FILE_SIZE));
	270
	271	for (i = 0; i < (dso_cnt - 1); i++) {
	272	struct dso *dso = dsos[i];
	273
	274	/*
63d3c6f3 NK	275	* Open dsos via dso__data_fd(), it opens the data
63d3c6f3 NK	276	* file and keep it open (unless open file limit).
4ebbcb84	277	*/
63d3c6f3 NK	278	fd = dso__data_fd(dso, &machine);
	279	TEST_ASSERT_VAL("failed to get fd", fd > 0);
	280
4ebbcb84	281	if (i % 2) {
4ebbcb84 JO	282	#define BUFSIZE 10
	283	u8 buf[BUFSIZE];
	284	ssize_t n;
	285
	286	n = dso__data_read_offset(dso, &machine, 0, buf, BUFSIZE);
	287	TEST_ASSERT_VAL("failed to read dso", n == BUFSIZE);
	288	}
	289	}
	290
66af43d5 NK	291	/* verify the first one is already open */
	292	TEST_ASSERT_VAL("dsos[0] is not open", dsos[0]->data.fd != -1);
	293
	294	/* open +1 dso to reach the allowed limit */
4ebbcb84 JO	295	fd = dso__data_fd(dsos[i], &machine);
	296	TEST_ASSERT_VAL("failed to get fd", fd > 0);
	297
	298	/* should force the first one to be closed */
	299	TEST_ASSERT_VAL("failed to close dsos[0]", dsos[0]->data.fd == -1);
	300
	301	/* cleanup everything */
	302	dsos__delete(dso_cnt);
	303
	304	/* Make sure we did not leak any file descriptor. */
	305	nr_end = open_files_cnt();
	306	pr_debug("nr start %ld, nr stop %ld\n", nr, nr_end);
	307	TEST_ASSERT_VAL("failed leadking files", nr == nr_end);
	308	return 0;
	309	}
45dc1bb5	310
81f17c90	311	int test__dso_data_reopen(struct test *test __maybe_unused, int subtest __maybe_unused)
45dc1bb5 JO	312	{
	313	struct machine machine;
	314	long nr_end, nr = open_files_cnt();
	315	int fd, fd_extra;
	316
	317	#define dso_0 (dsos[0])
	318	#define dso_1 (dsos[1])
	319	#define dso_2 (dsos[2])
	320
f3069249 JO	321	/* Rest the internal dso open counter limit. */
	322	reset_fd_limit();
	323
45dc1bb5 JO	324	memset(&machine, 0, sizeof(machine));
	325
	326	/*
	327	* Test scenario:
	328	* - create 3 dso objects
	329	* - set process file descriptor limit to current
	330	* files count + 3
	331	* - test that the first dso gets closed when we
	332	* reach the files count limit
	333	*/
	334
	335	/* Make sure we are able to open 3 fds anyway */
	336	TEST_ASSERT_VAL("failed to set file limit",
	337	!set_fd_limit((nr + 3)));
	338
	339	TEST_ASSERT_VAL("failed to create dsos\n", !dsos__create(3, TEST_FILE_SIZE));
	340
	341	/* open dso_0 */
	342	fd = dso__data_fd(dso_0, &machine);
	343	TEST_ASSERT_VAL("failed to get fd", fd > 0);
	344
	345	/* open dso_1 */
	346	fd = dso__data_fd(dso_1, &machine);
	347	TEST_ASSERT_VAL("failed to get fd", fd > 0);
	348
	349	/*
	350	* open extra file descriptor and we just
	351	* reached the files count limit
	352	*/
	353	fd_extra = open("/dev/null", O_RDONLY);
	354	TEST_ASSERT_VAL("failed to open extra fd", fd_extra > 0);
	355
	356	/* open dso_2 */
	357	fd = dso__data_fd(dso_2, &machine);
	358	TEST_ASSERT_VAL("failed to get fd", fd > 0);
	359
	360	/*
	361	* dso_0 should get closed, because we reached
	362	* the file descriptor limit
	363	*/
	364	TEST_ASSERT_VAL("failed to close dso_0", dso_0->data.fd == -1);
	365
	366	/* open dso_0 */
	367	fd = dso__data_fd(dso_0, &machine);
	368	TEST_ASSERT_VAL("failed to get fd", fd > 0);
	369
	370	/*
	371	* dso_1 should get closed, because we reached
	372	* the file descriptor limit
	373	*/
	374	TEST_ASSERT_VAL("failed to close dso_1", dso_1->data.fd == -1);
	375
	376	/* cleanup everything */
	377	close(fd_extra);
	378	dsos__delete(3);
	379
	380	/* Make sure we did not leak any file descriptor. */
	381	nr_end = open_files_cnt();
	382	pr_debug("nr start %ld, nr stop %ld\n", nr, nr_end);
	383	TEST_ASSERT_VAL("failed leadking files", nr == nr_end);
	384	return 0;
	385	}