trap signals for "-serial mon:stdio"
[qemu.git] / tests / test-iov.c
1 #include <glib.h>
2 #include "qemu-common.h"
3 #include "qemu/iov.h"
4 #include "qemu/sockets.h"
5
6 /* create a randomly-sized iovec with random vectors */
7 static void iov_random(struct iovec **iovp, unsigned *iov_cntp)
8 {
9 unsigned niov = g_test_rand_int_range(3,8);
10 struct iovec *iov = g_malloc(niov * sizeof(*iov));
11 unsigned i;
12 for (i = 0; i < niov; ++i) {
13 iov[i].iov_len = g_test_rand_int_range(5,20);
14 iov[i].iov_base = g_malloc(iov[i].iov_len);
15 }
16 *iovp = iov;
17 *iov_cntp = niov;
18 }
19
20 static void iov_free(struct iovec *iov, unsigned niov)
21 {
22 unsigned i;
23 for (i = 0; i < niov; ++i) {
24 g_free(iov[i].iov_base);
25 }
26 g_free(iov);
27 }
28
29 static void test_iov_bytes(struct iovec *iov, unsigned niov,
30 size_t offset, size_t bytes)
31 {
32 unsigned i;
33 size_t j, o;
34 unsigned char *b;
35 o = 0;
36
37 /* we walk over all elements, */
38 for (i = 0; i < niov; ++i) {
39 b = iov[i].iov_base;
40 /* over each char of each element, */
41 for (j = 0; j < iov[i].iov_len; ++j) {
42 /* counting each of them and
43 * verifying that the ones within [offset,offset+bytes)
44 * range are equal to the position number (o) */
45 if (o >= offset && o < offset + bytes) {
46 g_assert(b[j] == (o & 255));
47 } else {
48 g_assert(b[j] == 0xff);
49 }
50 ++o;
51 }
52 }
53 }
54
55 static void test_to_from_buf_1(void)
56 {
57 unsigned niov;
58 struct iovec *iov;
59 size_t sz;
60 unsigned char *ibuf, *obuf;
61 unsigned i, j, n;
62
63 iov_random(&iov, &niov);
64
65 sz = iov_size(iov, niov);
66
67 ibuf = g_malloc(sz + 8) + 4;
68 memcpy(ibuf-4, "aaaa", 4); memcpy(ibuf + sz, "bbbb", 4);
69 obuf = g_malloc(sz + 8) + 4;
70 memcpy(obuf-4, "xxxx", 4); memcpy(obuf + sz, "yyyy", 4);
71
72 /* fill in ibuf with 0123456... */
73 for (i = 0; i < sz; ++i) {
74 ibuf[i] = i & 255;
75 }
76
77 for (i = 0; i <= sz; ++i) {
78
79 /* Test from/to buf for offset(i) in [0..sz] up to the end of buffer.
80 * For last iteration with offset == sz, the procedure should
81 * skip whole vector and process exactly 0 bytes */
82
83 /* first set bytes [i..sz) to some "random" value */
84 n = iov_memset(iov, niov, 0, 0xff, -1);
85 g_assert(n == sz);
86
87 /* next copy bytes [i..sz) from ibuf to iovec */
88 n = iov_from_buf(iov, niov, i, ibuf + i, -1);
89 g_assert(n == sz - i);
90
91 /* clear part of obuf */
92 memset(obuf + i, 0, sz - i);
93 /* and set this part of obuf to values from iovec */
94 n = iov_to_buf(iov, niov, i, obuf + i, -1);
95 g_assert(n == sz - i);
96
97 /* now compare resulting buffers */
98 g_assert(memcmp(ibuf, obuf, sz) == 0);
99
100 /* test just one char */
101 n = iov_to_buf(iov, niov, i, obuf + i, 1);
102 g_assert(n == (i < sz));
103 if (n) {
104 g_assert(obuf[i] == (i & 255));
105 }
106
107 for (j = i; j <= sz; ++j) {
108 /* now test num of bytes cap up to byte no. j,
109 * with j in [i..sz]. */
110
111 /* clear iovec */
112 n = iov_memset(iov, niov, 0, 0xff, -1);
113 g_assert(n == sz);
114
115 /* copy bytes [i..j) from ibuf to iovec */
116 n = iov_from_buf(iov, niov, i, ibuf + i, j - i);
117 g_assert(n == j - i);
118
119 /* clear part of obuf */
120 memset(obuf + i, 0, j - i);
121
122 /* copy bytes [i..j) from iovec to obuf */
123 n = iov_to_buf(iov, niov, i, obuf + i, j - i);
124 g_assert(n == j - i);
125
126 /* verify result */
127 g_assert(memcmp(ibuf, obuf, sz) == 0);
128
129 /* now actually check if the iovec contains the right data */
130 test_iov_bytes(iov, niov, i, j - i);
131 }
132 }
133 g_assert(!memcmp(ibuf-4, "aaaa", 4) && !memcmp(ibuf+sz, "bbbb", 4));
134 g_free(ibuf-4);
135 g_assert(!memcmp(obuf-4, "xxxx", 4) && !memcmp(obuf+sz, "yyyy", 4));
136 g_free(obuf-4);
137 iov_free(iov, niov);
138 }
139
140 static void test_to_from_buf(void)
141 {
142 int x;
143 for (x = 0; x < 4; ++x) {
144 test_to_from_buf_1();
145 }
146 }
147
148 static void test_io(void)
149 {
150 #ifndef _WIN32
151 /* socketpair(PF_UNIX) which does not exist on windows */
152
153 int sv[2];
154 int r;
155 unsigned i, j, k, s, t;
156 fd_set fds;
157 unsigned niov;
158 struct iovec *iov, *siov;
159 unsigned char *buf;
160 size_t sz;
161
162 iov_random(&iov, &niov);
163 sz = iov_size(iov, niov);
164 buf = g_malloc(sz);
165 for (i = 0; i < sz; ++i) {
166 buf[i] = i & 255;
167 }
168 iov_from_buf(iov, niov, 0, buf, sz);
169
170 siov = g_malloc(sizeof(*iov) * niov);
171 memcpy(siov, iov, sizeof(*iov) * niov);
172
173 if (socketpair(PF_UNIX, SOCK_STREAM, 0, sv) < 0) {
174 perror("socketpair");
175 exit(1);
176 }
177
178 FD_ZERO(&fds);
179
180 t = 0;
181 if (fork() == 0) {
182 /* writer */
183
184 close(sv[0]);
185 FD_SET(sv[1], &fds);
186 fcntl(sv[1], F_SETFL, O_RDWR|O_NONBLOCK);
187 r = g_test_rand_int_range(sz / 2, sz);
188 setsockopt(sv[1], SOL_SOCKET, SO_SNDBUF, &r, sizeof(r));
189
190 for (i = 0; i <= sz; ++i) {
191 for (j = i; j <= sz; ++j) {
192 k = i;
193 do {
194 s = g_test_rand_int_range(0, j - k + 1);
195 r = iov_send(sv[1], iov, niov, k, s);
196 g_assert(memcmp(iov, siov, sizeof(*iov)*niov) == 0);
197 if (r >= 0) {
198 k += r;
199 t += r;
200 usleep(g_test_rand_int_range(0, 30));
201 } else if (errno == EAGAIN) {
202 select(sv[1]+1, NULL, &fds, NULL, NULL);
203 continue;
204 } else {
205 perror("send");
206 exit(1);
207 }
208 } while(k < j);
209 }
210 }
211 exit(0);
212
213 } else {
214 /* reader & verifier */
215
216 close(sv[1]);
217 FD_SET(sv[0], &fds);
218 fcntl(sv[0], F_SETFL, O_RDWR|O_NONBLOCK);
219 r = g_test_rand_int_range(sz / 2, sz);
220 setsockopt(sv[0], SOL_SOCKET, SO_RCVBUF, &r, sizeof(r));
221 usleep(500000);
222
223 for (i = 0; i <= sz; ++i) {
224 for (j = i; j <= sz; ++j) {
225 k = i;
226 iov_memset(iov, niov, 0, 0xff, -1);
227 do {
228 s = g_test_rand_int_range(0, j - k + 1);
229 r = iov_recv(sv[0], iov, niov, k, s);
230 g_assert(memcmp(iov, siov, sizeof(*iov)*niov) == 0);
231 if (r > 0) {
232 k += r;
233 t += r;
234 } else if (!r) {
235 if (s) {
236 break;
237 }
238 } else if (errno == EAGAIN) {
239 select(sv[0]+1, &fds, NULL, NULL, NULL);
240 continue;
241 } else {
242 perror("recv");
243 exit(1);
244 }
245 } while(k < j);
246 test_iov_bytes(iov, niov, i, j - i);
247 }
248 }
249 }
250 #endif
251 }
252
253 static void test_discard_front(void)
254 {
255 struct iovec *iov;
256 struct iovec *iov_tmp;
257 unsigned int iov_cnt;
258 unsigned int iov_cnt_tmp;
259 void *old_base;
260 size_t size;
261 size_t ret;
262
263 /* Discard zero bytes */
264 iov_random(&iov, &iov_cnt);
265 iov_tmp = iov;
266 iov_cnt_tmp = iov_cnt;
267 ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, 0);
268 g_assert(ret == 0);
269 g_assert(iov_tmp == iov);
270 g_assert(iov_cnt_tmp == iov_cnt);
271 iov_free(iov, iov_cnt);
272
273 /* Discard more bytes than vector size */
274 iov_random(&iov, &iov_cnt);
275 iov_tmp = iov;
276 iov_cnt_tmp = iov_cnt;
277 size = iov_size(iov, iov_cnt);
278 ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, size + 1);
279 g_assert(ret == size);
280 g_assert(iov_cnt_tmp == 0);
281 iov_free(iov, iov_cnt);
282
283 /* Discard entire vector */
284 iov_random(&iov, &iov_cnt);
285 iov_tmp = iov;
286 iov_cnt_tmp = iov_cnt;
287 size = iov_size(iov, iov_cnt);
288 ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, size);
289 g_assert(ret == size);
290 g_assert(iov_cnt_tmp == 0);
291 iov_free(iov, iov_cnt);
292
293 /* Discard within first element */
294 iov_random(&iov, &iov_cnt);
295 iov_tmp = iov;
296 iov_cnt_tmp = iov_cnt;
297 old_base = iov->iov_base;
298 size = g_test_rand_int_range(1, iov->iov_len);
299 ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, size);
300 g_assert(ret == size);
301 g_assert(iov_tmp == iov);
302 g_assert(iov_cnt_tmp == iov_cnt);
303 g_assert(iov_tmp->iov_base == old_base + size);
304 iov_tmp->iov_base = old_base; /* undo before g_free() */
305 iov_free(iov, iov_cnt);
306
307 /* Discard entire first element */
308 iov_random(&iov, &iov_cnt);
309 iov_tmp = iov;
310 iov_cnt_tmp = iov_cnt;
311 ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, iov->iov_len);
312 g_assert(ret == iov->iov_len);
313 g_assert(iov_tmp == iov + 1);
314 g_assert(iov_cnt_tmp == iov_cnt - 1);
315 iov_free(iov, iov_cnt);
316
317 /* Discard within second element */
318 iov_random(&iov, &iov_cnt);
319 iov_tmp = iov;
320 iov_cnt_tmp = iov_cnt;
321 old_base = iov[1].iov_base;
322 size = iov->iov_len + g_test_rand_int_range(1, iov[1].iov_len);
323 ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, size);
324 g_assert(ret == size);
325 g_assert(iov_tmp == iov + 1);
326 g_assert(iov_cnt_tmp == iov_cnt - 1);
327 g_assert(iov_tmp->iov_base == old_base + (size - iov->iov_len));
328 iov_tmp->iov_base = old_base; /* undo before g_free() */
329 iov_free(iov, iov_cnt);
330 }
331
332 static void test_discard_back(void)
333 {
334 struct iovec *iov;
335 unsigned int iov_cnt;
336 unsigned int iov_cnt_tmp;
337 void *old_base;
338 size_t size;
339 size_t ret;
340
341 /* Discard zero bytes */
342 iov_random(&iov, &iov_cnt);
343 iov_cnt_tmp = iov_cnt;
344 ret = iov_discard_back(iov, &iov_cnt_tmp, 0);
345 g_assert(ret == 0);
346 g_assert(iov_cnt_tmp == iov_cnt);
347 iov_free(iov, iov_cnt);
348
349 /* Discard more bytes than vector size */
350 iov_random(&iov, &iov_cnt);
351 iov_cnt_tmp = iov_cnt;
352 size = iov_size(iov, iov_cnt);
353 ret = iov_discard_back(iov, &iov_cnt_tmp, size + 1);
354 g_assert(ret == size);
355 g_assert(iov_cnt_tmp == 0);
356 iov_free(iov, iov_cnt);
357
358 /* Discard entire vector */
359 iov_random(&iov, &iov_cnt);
360 iov_cnt_tmp = iov_cnt;
361 size = iov_size(iov, iov_cnt);
362 ret = iov_discard_back(iov, &iov_cnt_tmp, size);
363 g_assert(ret == size);
364 g_assert(iov_cnt_tmp == 0);
365 iov_free(iov, iov_cnt);
366
367 /* Discard within last element */
368 iov_random(&iov, &iov_cnt);
369 iov_cnt_tmp = iov_cnt;
370 old_base = iov[iov_cnt - 1].iov_base;
371 size = g_test_rand_int_range(1, iov[iov_cnt - 1].iov_len);
372 ret = iov_discard_back(iov, &iov_cnt_tmp, size);
373 g_assert(ret == size);
374 g_assert(iov_cnt_tmp == iov_cnt);
375 g_assert(iov[iov_cnt - 1].iov_base == old_base);
376 iov_free(iov, iov_cnt);
377
378 /* Discard entire last element */
379 iov_random(&iov, &iov_cnt);
380 iov_cnt_tmp = iov_cnt;
381 old_base = iov[iov_cnt - 1].iov_base;
382 size = iov[iov_cnt - 1].iov_len;
383 ret = iov_discard_back(iov, &iov_cnt_tmp, size);
384 g_assert(ret == size);
385 g_assert(iov_cnt_tmp == iov_cnt - 1);
386 iov_free(iov, iov_cnt);
387
388 /* Discard within second-to-last element */
389 iov_random(&iov, &iov_cnt);
390 iov_cnt_tmp = iov_cnt;
391 old_base = iov[iov_cnt - 2].iov_base;
392 size = iov[iov_cnt - 1].iov_len +
393 g_test_rand_int_range(1, iov[iov_cnt - 2].iov_len);
394 ret = iov_discard_back(iov, &iov_cnt_tmp, size);
395 g_assert(ret == size);
396 g_assert(iov_cnt_tmp == iov_cnt - 1);
397 g_assert(iov[iov_cnt - 2].iov_base == old_base);
398 iov_free(iov, iov_cnt);
399 }
400
401 int main(int argc, char **argv)
402 {
403 g_test_init(&argc, &argv, NULL);
404 g_test_rand_int();
405 g_test_add_func("/basic/iov/from-to-buf", test_to_from_buf);
406 g_test_add_func("/basic/iov/io", test_io);
407 g_test_add_func("/basic/iov/discard-front", test_discard_front);
408 g_test_add_func("/basic/iov/discard-back", test_discard_back);
409 return g_test_run();
410 }