tests/libqtest.c

   1 /*
   2  * QTest
   3  *
   4  * Copyright IBM, Corp. 2012
   5  * Copyright Red Hat, Inc. 2012
   6  * Copyright SUSE LINUX Products GmbH 2013
   7  *
   8  * Authors:
   9  *  Anthony Liguori   <aliguori@us.ibm.com>
  10  *  Paolo Bonzini     <pbonzini@redhat.com>
  11  *  Andreas Färber    <afaerber@suse.de>
  12  *
  13  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  14  * See the COPYING file in the top-level directory.
  15  *
  16  */
  17 #include "libqtest.h"
  18
  19 #include <glib.h>
  20 #include <sys/types.h>
  21 #include <sys/socket.h>
  22 #include <sys/wait.h>
  23 #include <sys/un.h>
  24 #include <inttypes.h>
  25 #include <errno.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <unistd.h>
  29 #include <string.h>
  30
  31 #include "qemu/compiler.h"
  32 #include "qemu/osdep.h"
  33
  34 #define MAX_IRQ 256
  35
  36 QTestState *global_qtest;
  37
  38 struct QTestState
  39 {
  40     int fd;
  41     int qmp_fd;
  42     bool irq_level[MAX_IRQ];
  43     GString *rx;
  44     gchar *pid_file; /* QEMU PID file */
  45     int child_pid;   /* Child process created to execute QEMU */
  46     char *socket_path, *qmp_socket_path;
  47 };
  48
  49 #define g_assert_no_errno(ret) do { \
  50     g_assert_cmpint(ret, !=, -1); \
  51 } while (0)
  52
  53 static int init_socket(const char *socket_path)
  54 {
  55     struct sockaddr_un addr;
  56     int sock;
  57     int ret;
  58
  59     sock = socket(PF_UNIX, SOCK_STREAM, 0);
  60     g_assert_no_errno(sock);
  61
  62     addr.sun_family = AF_UNIX;
  63     snprintf(addr.sun_path, sizeof(addr.sun_path), "%s", socket_path);
  64     qemu_set_cloexec(sock);
  65
  66     do {
  67         ret = bind(sock, (struct sockaddr *)&addr, sizeof(addr));
  68     } while (ret == -1 && errno == EINTR);
  69     g_assert_no_errno(ret);
  70     listen(sock, 1);
  71
  72     return sock;
  73 }
  74
  75 static int socket_accept(int sock)
  76 {
  77     struct sockaddr_un addr;
  78     socklen_t addrlen;
  79     int ret;
  80
  81     addrlen = sizeof(addr);
  82     do {
  83         ret = accept(sock, (struct sockaddr *)&addr, &addrlen);
  84     } while (ret == -1 && errno == EINTR);
  85     g_assert_no_errno(ret);
  86     close(sock);
  87
  88     return ret;
  89 }
  90
  91 static pid_t qtest_qemu_pid(QTestState *s)
  92 {
  93     FILE *f;
  94     char buffer[1024];
  95     pid_t pid = -1;
  96
  97     f = fopen(s->pid_file, "r");
  98     if (f) {
  99         if (fgets(buffer, sizeof(buffer), f)) {
 100             pid = atoi(buffer);
 101         }
 102     }
 103     fclose(f);
 104     return pid;
 105 }
 106
 107 QTestState *qtest_init(const char *extra_args)
 108 {
 109     QTestState *s;
 110     int sock, qmpsock, i;
 111     gchar *pid_file;
 112     gchar *command;
 113     const char *qemu_binary;
 114     pid_t pid;
 115
 116     qemu_binary = getenv("QTEST_QEMU_BINARY");
 117     g_assert(qemu_binary != NULL);
 118
 119     s = g_malloc(sizeof(*s));
 120
 121     s->socket_path = g_strdup_printf("/tmp/qtest-%d.sock", getpid());
 122     s->qmp_socket_path = g_strdup_printf("/tmp/qtest-%d.qmp", getpid());
 123     pid_file = g_strdup_printf("/tmp/qtest-%d.pid", getpid());
 124
 125     sock = init_socket(s->socket_path);
 126     qmpsock = init_socket(s->qmp_socket_path);
 127
 128     pid = fork();
 129     if (pid == 0) {
 130         command = g_strdup_printf("%s "
 131                                   "-qtest unix:%s,nowait "
 132                                   "-qtest-log /dev/null "
 133                                   "-qmp unix:%s,nowait "
 134                                   "-pidfile %s "
 135                                   "-machine accel=qtest "
 136                                   "%s", qemu_binary, s->socket_path,
 137                                   s->qmp_socket_path, pid_file,
 138                                   extra_args ?: "");
 139         execlp("/bin/sh", "sh", "-c", command, NULL);
 140         exit(1);
 141     }
 142
 143     s->fd = socket_accept(sock);
 144     s->qmp_fd = socket_accept(qmpsock);
 145
 146     s->rx = g_string_new("");
 147     s->pid_file = pid_file;
 148     s->child_pid = pid;
 149     for (i = 0; i < MAX_IRQ; i++) {
 150         s->irq_level[i] = false;
 151     }
 152
 153     /* Read the QMP greeting and then do the handshake */
 154     qtest_qmp(s, "");
 155     qtest_qmp(s, "{ 'execute': 'qmp_capabilities' }");
 156
 157     if (getenv("QTEST_STOP")) {
 158         kill(qtest_qemu_pid(s), SIGSTOP);
 159     }
 160
 161     return s;
 162 }
 163
 164 void qtest_quit(QTestState *s)
 165 {
 166     int status;
 167
 168     pid_t pid = qtest_qemu_pid(s);
 169     if (pid != -1) {
 170         kill(pid, SIGTERM);
 171         waitpid(pid, &status, 0);
 172     }
 173
 174     unlink(s->pid_file);
 175     unlink(s->socket_path);
 176     unlink(s->qmp_socket_path);
 177     g_free(s->pid_file);
 178     g_free(s->socket_path);
 179     g_free(s->qmp_socket_path);
 180 }
 181
 182 static void socket_sendf(int fd, const char *fmt, va_list ap)
 183 {
 184     gchar *str;
 185     size_t size, offset;
 186
 187     str = g_strdup_vprintf(fmt, ap);
 188     size = strlen(str);
 189
 190     offset = 0;
 191     while (offset < size) {
 192         ssize_t len;
 193
 194         len = write(fd, str + offset, size - offset);
 195         if (len == -1 && errno == EINTR) {
 196             continue;
 197         }
 198
 199         g_assert_no_errno(len);
 200         g_assert_cmpint(len, >, 0);
 201
 202         offset += len;
 203     }
 204 }
 205
 206 static void GCC_FMT_ATTR(2, 3) qtest_sendf(QTestState *s, const char *fmt, ...)
 207 {
 208     va_list ap;
 209
 210     va_start(ap, fmt);
 211     socket_sendf(s->fd, fmt, ap);
 212     va_end(ap);
 213 }
 214
 215 static GString *qtest_recv_line(QTestState *s)
 216 {
 217     GString *line;
 218     size_t offset;
 219     char *eol;
 220
 221     while ((eol = strchr(s->rx->str, '\n')) == NULL) {
 222         ssize_t len;
 223         char buffer[1024];
 224
 225         len = read(s->fd, buffer, sizeof(buffer));
 226         if (len == -1 && errno == EINTR) {
 227             continue;
 228         }
 229
 230         if (len == -1 || len == 0) {
 231             fprintf(stderr, "Broken pipe\n");
 232             exit(1);
 233         }
 234
 235         g_string_append_len(s->rx, buffer, len);
 236     }
 237
 238     offset = eol - s->rx->str;
 239     line = g_string_new_len(s->rx->str, offset);
 240     g_string_erase(s->rx, 0, offset + 1);
 241
 242     return line;
 243 }
 244
 245 static gchar **qtest_rsp(QTestState *s, int expected_args)
 246 {
 247     GString *line;
 248     gchar **words;
 249     int i;
 250
 251 redo:
 252     line = qtest_recv_line(s);
 253     words = g_strsplit(line->str, " ", 0);
 254     g_string_free(line, TRUE);
 255
 256     if (strcmp(words[0], "IRQ") == 0) {
 257         int irq;
 258
 259         g_assert(words[1] != NULL);
 260         g_assert(words[2] != NULL);
 261
 262         irq = strtoul(words[2], NULL, 0);
 263         g_assert_cmpint(irq, >=, 0);
 264         g_assert_cmpint(irq, <, MAX_IRQ);
 265
 266         if (strcmp(words[1], "raise") == 0) {
 267             s->irq_level[irq] = true;
 268         } else {
 269             s->irq_level[irq] = false;
 270         }
 271
 272         g_strfreev(words);
 273         goto redo;
 274     }
 275
 276     g_assert(words[0] != NULL);
 277     g_assert_cmpstr(words[0], ==, "OK");
 278
 279     if (expected_args) {
 280         for (i = 0; i < expected_args; i++) {
 281             g_assert(words[i] != NULL);
 282         }
 283     } else {
 284         g_strfreev(words);
 285     }
 286
 287     return words;
 288 }
 289
 290 void qtest_qmpv(QTestState *s, const char *fmt, va_list ap)
 291 {
 292     bool has_reply = false;
 293     int nesting = 0;
 294
 295     /* Send QMP request */
 296     socket_sendf(s->qmp_fd, fmt, ap);
 297
 298     /* Receive reply */
 299     while (!has_reply || nesting > 0) {
 300         ssize_t len;
 301         char c;
 302
 303         len = read(s->qmp_fd, &c, 1);
 304         if (len == -1 && errno == EINTR) {
 305             continue;
 306         }
 307
 308         if (len == -1 || len == 0) {
 309             fprintf(stderr, "Broken pipe\n");
 310             exit(1);
 311         }
 312
 313         switch (c) {
 314         case '{':
 315             nesting++;
 316             has_reply = true;
 317             break;
 318         case '}':
 319             nesting--;
 320             break;
 321         }
 322     }
 323 }
 324
 325 void qtest_qmp(QTestState *s, const char *fmt, ...)
 326 {
 327     va_list ap;
 328
 329     va_start(ap, fmt);
 330     qtest_qmpv(s, fmt, ap);
 331     va_end(ap);
 332 }
 333
 334 const char *qtest_get_arch(void)
 335 {
 336     const char *qemu = getenv("QTEST_QEMU_BINARY");
 337     const char *end = strrchr(qemu, '/');
 338
 339     return end + strlen("/qemu-system-");
 340 }
 341
 342 bool qtest_get_irq(QTestState *s, int num)
 343 {
 344     /* dummy operation in order to make sure irq is up to date */
 345     qtest_inb(s, 0);
 346
 347     return s->irq_level[num];
 348 }
 349
 350 static int64_t qtest_clock_rsp(QTestState *s)
 351 {
 352     gchar **words;
 353     int64_t clock;
 354     words = qtest_rsp(s, 2);
 355     clock = g_ascii_strtoll(words[1], NULL, 0);
 356     g_strfreev(words);
 357     return clock;
 358 }
 359
 360 int64_t qtest_clock_step_next(QTestState *s)
 361 {
 362     qtest_sendf(s, "clock_step\n");
 363     return qtest_clock_rsp(s);
 364 }
 365
 366 int64_t qtest_clock_step(QTestState *s, int64_t step)
 367 {
 368     qtest_sendf(s, "clock_step %"PRIi64"\n", step);
 369     return qtest_clock_rsp(s);
 370 }
 371
 372 int64_t qtest_clock_set(QTestState *s, int64_t val)
 373 {
 374     qtest_sendf(s, "clock_set %"PRIi64"\n", val);
 375     return qtest_clock_rsp(s);
 376 }
 377
 378 void qtest_irq_intercept_out(QTestState *s, const char *qom_path)
 379 {
 380     qtest_sendf(s, "irq_intercept_out %s\n", qom_path);
 381     qtest_rsp(s, 0);
 382 }
 383
 384 void qtest_irq_intercept_in(QTestState *s, const char *qom_path)
 385 {
 386     qtest_sendf(s, "irq_intercept_in %s\n", qom_path);
 387     qtest_rsp(s, 0);
 388 }
 389
 390 static void qtest_out(QTestState *s, const char *cmd, uint16_t addr, uint32_t value)
 391 {
 392     qtest_sendf(s, "%s 0x%x 0x%x\n", cmd, addr, value);
 393     qtest_rsp(s, 0);
 394 }
 395
 396 void qtest_outb(QTestState *s, uint16_t addr, uint8_t value)
 397 {
 398     qtest_out(s, "outb", addr, value);
 399 }
 400
 401 void qtest_outw(QTestState *s, uint16_t addr, uint16_t value)
 402 {
 403     qtest_out(s, "outw", addr, value);
 404 }
 405
 406 void qtest_outl(QTestState *s, uint16_t addr, uint32_t value)
 407 {
 408     qtest_out(s, "outl", addr, value);
 409 }
 410
 411 static uint32_t qtest_in(QTestState *s, const char *cmd, uint16_t addr)
 412 {
 413     gchar **args;
 414     uint32_t value;
 415
 416     qtest_sendf(s, "%s 0x%x\n", cmd, addr);
 417     args = qtest_rsp(s, 2);
 418     value = strtoul(args[1], NULL, 0);
 419     g_strfreev(args);
 420
 421     return value;
 422 }
 423
 424 uint8_t qtest_inb(QTestState *s, uint16_t addr)
 425 {
 426     return qtest_in(s, "inb", addr);
 427 }
 428
 429 uint16_t qtest_inw(QTestState *s, uint16_t addr)
 430 {
 431     return qtest_in(s, "inw", addr);
 432 }
 433
 434 uint32_t qtest_inl(QTestState *s, uint16_t addr)
 435 {
 436     return qtest_in(s, "inl", addr);
 437 }
 438
 439 static void qtest_write(QTestState *s, const char *cmd, uint64_t addr,
 440                         uint64_t value)
 441 {
 442     qtest_sendf(s, "%s 0x%" PRIx64 " 0x%" PRIx64 "\n", cmd, addr, value);
 443     qtest_rsp(s, 0);
 444 }
 445
 446 void qtest_writeb(QTestState *s, uint64_t addr, uint8_t value)
 447 {
 448     qtest_write(s, "writeb", addr, value);
 449 }
 450
 451 void qtest_writew(QTestState *s, uint64_t addr, uint16_t value)
 452 {
 453     qtest_write(s, "writew", addr, value);
 454 }
 455
 456 void qtest_writel(QTestState *s, uint64_t addr, uint32_t value)
 457 {
 458     qtest_write(s, "writel", addr, value);
 459 }
 460
 461 void qtest_writeq(QTestState *s, uint64_t addr, uint64_t value)
 462 {
 463     qtest_write(s, "writeq", addr, value);
 464 }
 465
 466 static uint64_t qtest_read(QTestState *s, const char *cmd, uint64_t addr)
 467 {
 468     gchar **args;
 469     uint64_t value;
 470
 471     qtest_sendf(s, "%s 0x%" PRIx64 "\n", cmd, addr);
 472     args = qtest_rsp(s, 2);
 473     value = strtoull(args[1], NULL, 0);
 474     g_strfreev(args);
 475
 476     return value;
 477 }
 478
 479 uint8_t qtest_readb(QTestState *s, uint64_t addr)
 480 {
 481     return qtest_read(s, "readb", addr);
 482 }
 483
 484 uint16_t qtest_readw(QTestState *s, uint64_t addr)
 485 {
 486     return qtest_read(s, "readw", addr);
 487 }
 488
 489 uint32_t qtest_readl(QTestState *s, uint64_t addr)
 490 {
 491     return qtest_read(s, "readl", addr);
 492 }
 493
 494 uint64_t qtest_readq(QTestState *s, uint64_t addr)
 495 {
 496     return qtest_read(s, "readq", addr);
 497 }
 498
 499 static int hex2nib(char ch)
 500 {
 501     if (ch >= '0' && ch <= '9') {
 502         return ch - '0';
 503     } else if (ch >= 'a' && ch <= 'f') {
 504         return 10 + (ch - 'a');
 505     } else if (ch >= 'A' && ch <= 'F') {
 506         return 10 + (ch - 'a');
 507     } else {
 508         return -1;
 509     }
 510 }
 511
 512 void qtest_memread(QTestState *s, uint64_t addr, void *data, size_t size)
 513 {
 514     uint8_t *ptr = data;
 515     gchar **args;
 516     size_t i;
 517
 518     qtest_sendf(s, "read 0x%" PRIx64 " 0x%zx\n", addr, size);
 519     args = qtest_rsp(s, 2);
 520
 521     for (i = 0; i < size; i++) {
 522         ptr[i] = hex2nib(args[1][2 + (i * 2)]) << 4;
 523         ptr[i] |= hex2nib(args[1][2 + (i * 2) + 1]);
 524     }
 525
 526     g_strfreev(args);
 527 }
 528
 529 void qtest_add_func(const char *str, void (*fn))
 530 {
 531     gchar *path = g_strdup_printf("/%s/%s", qtest_get_arch(), str);
 532     g_test_add_func(path, fn);
 533 }
 534
 535 void qtest_memwrite(QTestState *s, uint64_t addr, const void *data, size_t size)
 536 {
 537     const uint8_t *ptr = data;
 538     size_t i;
 539
 540     qtest_sendf(s, "write 0x%" PRIx64 " 0x%zx 0x", addr, size);
 541     for (i = 0; i < size; i++) {
 542         qtest_sendf(s, "%02x", ptr[i]);
 543     }
 544     qtest_sendf(s, "\n");
 545     qtest_rsp(s, 0);
 546 }