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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) |
19 | { | |
822c45db JO |
20 | #define TEMPL "/tmp/perf-test-XXXXXX" |
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 */ |
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 |
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 | } |