2 #include <linux/types.h>
7 #include <sys/resource.h>
15 static char *test_file(int size)
17 #define TEMPL "/tmp/perf-test-XXXXXX"
18 static char buf_templ[sizeof(TEMPL)];
19 char *templ = buf_templ;
23 strcpy(buf_templ, TEMPL);
28 perror("mkstemp failed");
38 for (i = 0; i < size; i++)
39 buf[i] = (unsigned char) ((int) i % 10);
41 if (size != write(fd, buf, size))
49 #define TEST_FILE_SIZE (DSO__DATA_CACHE_SIZE * 20)
51 struct test_data_offset {
57 struct test_data_offset offsets[] = {
58 /* Fill first cache page. */
61 .data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
64 /* Read first cache page. */
67 .data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
70 /* Fill cache boundary pages. */
72 .offset = DSO__DATA_CACHE_SIZE - DSO__DATA_CACHE_SIZE % 10,
73 .data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
76 /* Read cache boundary pages. */
78 .offset = DSO__DATA_CACHE_SIZE - DSO__DATA_CACHE_SIZE % 10,
79 .data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
82 /* Fill final cache page. */
84 .offset = TEST_FILE_SIZE - 10,
85 .data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
88 /* Read final cache page. */
90 .offset = TEST_FILE_SIZE - 10,
91 .data = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
94 /* Read final cache page. */
96 .offset = TEST_FILE_SIZE - 3,
97 .data = { 7, 8, 9, 0, 0, 0, 0, 0, 0, 0 },
102 int test__dso_data(void)
104 struct machine machine;
106 char *file = test_file(TEST_FILE_SIZE);
109 TEST_ASSERT_VAL("No test file", file);
111 memset(&machine, 0, sizeof(machine));
113 dso = dso__new((const char *)file);
115 TEST_ASSERT_VAL("Failed to access to dso",
116 dso__data_fd(dso, &machine) >= 0);
118 /* Basic 10 bytes tests. */
119 for (i = 0; i < ARRAY_SIZE(offsets); i++) {
120 struct test_data_offset *data = &offsets[i];
125 size = dso__data_read_offset(dso, &machine, data->offset,
128 TEST_ASSERT_VAL("Wrong size", size == data->size);
129 TEST_ASSERT_VAL("Wrong data", !memcmp(buf, data->data, 10));
132 /* Read cross multiple cache pages. */
138 buf = malloc(TEST_FILE_SIZE);
139 TEST_ASSERT_VAL("ENOMEM\n", buf);
141 /* First iteration to fill caches, second one to read them. */
142 for (c = 0; c < 2; c++) {
143 memset(buf, 0, TEST_FILE_SIZE);
144 size = dso__data_read_offset(dso, &machine, 10,
145 buf, TEST_FILE_SIZE);
147 TEST_ASSERT_VAL("Wrong size",
148 size == (TEST_FILE_SIZE - 10));
150 for (i = 0; i < (size_t)size; i++)
151 TEST_ASSERT_VAL("Wrong data",
163 static long open_files_cnt(void)
170 scnprintf(path, PATH_MAX, "%s/self/fd", procfs__mountpoint());
171 pr_debug("fd path: %s\n", path);
174 TEST_ASSERT_VAL("failed to open fd directory", dir);
176 while ((dent = readdir(dir)) != NULL) {
177 if (!strcmp(dent->d_name, ".") ||
178 !strcmp(dent->d_name, ".."))
188 static struct dso **dsos;
190 static int dsos__create(int cnt, int size)
194 dsos = malloc(sizeof(dsos) * cnt);
195 TEST_ASSERT_VAL("failed to alloc dsos array", dsos);
197 for (i = 0; i < cnt; i++) {
200 file = test_file(size);
201 TEST_ASSERT_VAL("failed to get dso file", file);
203 dsos[i] = dso__new(file);
204 TEST_ASSERT_VAL("failed to get dso", dsos[i]);
210 static void dsos__delete(int cnt)
214 for (i = 0; i < cnt; i++) {
215 struct dso *dso = dsos[i];
224 static int set_fd_limit(int n)
228 if (getrlimit(RLIMIT_NOFILE, &rlim))
231 pr_debug("file limit %ld, new %d\n", (long) rlim.rlim_cur, n);
234 return setrlimit(RLIMIT_NOFILE, &rlim);
237 int test__dso_data_cache(void)
239 struct machine machine;
240 long nr_end, nr = open_files_cnt();
241 int dso_cnt, limit, i, fd;
243 memset(&machine, 0, sizeof(machine));
245 /* set as system limit */
247 TEST_ASSERT_VAL("failed to set file limit", !set_fd_limit(limit));
249 /* and this is now our dso open FDs limit */
251 TEST_ASSERT_VAL("failed to create dsos\n",
252 !dsos__create(dso_cnt, TEST_FILE_SIZE));
254 for (i = 0; i < (dso_cnt - 1); i++) {
255 struct dso *dso = dsos[i];
258 * Open dsos via dso__data_fd(), it opens the data
259 * file and keep it open (unless open file limit).
261 fd = dso__data_fd(dso, &machine);
262 TEST_ASSERT_VAL("failed to get fd", fd > 0);
269 n = dso__data_read_offset(dso, &machine, 0, buf, BUFSIZE);
270 TEST_ASSERT_VAL("failed to read dso", n == BUFSIZE);
274 /* verify the first one is already open */
275 TEST_ASSERT_VAL("dsos[0] is not open", dsos[0]->data.fd != -1);
277 /* open +1 dso to reach the allowed limit */
278 fd = dso__data_fd(dsos[i], &machine);
279 TEST_ASSERT_VAL("failed to get fd", fd > 0);
281 /* should force the first one to be closed */
282 TEST_ASSERT_VAL("failed to close dsos[0]", dsos[0]->data.fd == -1);
284 /* cleanup everything */
285 dsos__delete(dso_cnt);
287 /* Make sure we did not leak any file descriptor. */
288 nr_end = open_files_cnt();
289 pr_debug("nr start %ld, nr stop %ld\n", nr, nr_end);
290 TEST_ASSERT_VAL("failed leadking files", nr == nr_end);
294 int test__dso_data_reopen(void)
296 struct machine machine;
297 long nr_end, nr = open_files_cnt();
300 #define dso_0 (dsos[0])
301 #define dso_1 (dsos[1])
302 #define dso_2 (dsos[2])
304 memset(&machine, 0, sizeof(machine));
308 * - create 3 dso objects
309 * - set process file descriptor limit to current
311 * - test that the first dso gets closed when we
312 * reach the files count limit
315 /* Make sure we are able to open 3 fds anyway */
316 TEST_ASSERT_VAL("failed to set file limit",
317 !set_fd_limit((nr + 3)));
319 TEST_ASSERT_VAL("failed to create dsos\n", !dsos__create(3, TEST_FILE_SIZE));
322 fd = dso__data_fd(dso_0, &machine);
323 TEST_ASSERT_VAL("failed to get fd", fd > 0);
326 fd = dso__data_fd(dso_1, &machine);
327 TEST_ASSERT_VAL("failed to get fd", fd > 0);
330 * open extra file descriptor and we just
331 * reached the files count limit
333 fd_extra = open("/dev/null", O_RDONLY);
334 TEST_ASSERT_VAL("failed to open extra fd", fd_extra > 0);
337 fd = dso__data_fd(dso_2, &machine);
338 TEST_ASSERT_VAL("failed to get fd", fd > 0);
341 * dso_0 should get closed, because we reached
342 * the file descriptor limit
344 TEST_ASSERT_VAL("failed to close dso_0", dso_0->data.fd == -1);
347 fd = dso__data_fd(dso_0, &machine);
348 TEST_ASSERT_VAL("failed to get fd", fd > 0);
351 * dso_1 should get closed, because we reached
352 * the file descriptor limit
354 TEST_ASSERT_VAL("failed to close dso_1", dso_1->data.fd == -1);
356 /* cleanup everything */
360 /* Make sure we did not leak any file descriptor. */
361 nr_end = open_files_cnt();
362 pr_debug("nr start %ld, nr stop %ld\n", nr, nr_end);
363 TEST_ASSERT_VAL("failed leadking files", nr == nr_end);