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 "qemu/osdep.h"
  18
  19 #include <sys/socket.h>
  20 #include <sys/wait.h>
  21 #include <sys/un.h>
  22
  23 #include "libqtest.h"
  24 #include "qemu-common.h"
  25 #include "qemu/ctype.h"
  26 #include "qemu/cutils.h"
  27 #include "qapi/error.h"
  28 #include "qapi/qmp/json-parser.h"
  29 #include "qapi/qmp/qdict.h"
  30 #include "qapi/qmp/qjson.h"
  31 #include "qapi/qmp/qlist.h"
  32 #include "qapi/qmp/qstring.h"
  33
  34 #define MAX_IRQ 256
  35 #define SOCKET_TIMEOUT 50
  36 #define SOCKET_MAX_FDS 16
  37
  38 struct QTestState
  39 {
  40     int fd;
  41     int qmp_fd;
  42     pid_t qemu_pid;  /* our child QEMU process */
  43     int wstatus;
  44     int expected_status;
  45     bool big_endian;
  46     bool irq_level[MAX_IRQ];
  47     GString *rx;
  48 };
  49
  50 static GHookList abrt_hooks;
  51 static struct sigaction sigact_old;
  52
  53 static int qtest_query_target_endianness(QTestState *s);
  54
  55 static int init_socket(const char *socket_path)
  56 {
  57     struct sockaddr_un addr;
  58     int sock;
  59     int ret;
  60
  61     sock = socket(PF_UNIX, SOCK_STREAM, 0);
  62     g_assert_cmpint(sock, !=, -1);
  63
  64     addr.sun_family = AF_UNIX;
  65     snprintf(addr.sun_path, sizeof(addr.sun_path), "%s", socket_path);
  66     qemu_set_cloexec(sock);
  67
  68     do {
  69         ret = bind(sock, (struct sockaddr *)&addr, sizeof(addr));
  70     } while (ret == -1 && errno == EINTR);
  71     g_assert_cmpint(ret, !=, -1);
  72     ret = listen(sock, 1);
  73     g_assert_cmpint(ret, !=, -1);
  74
  75     return sock;
  76 }
  77
  78 static int socket_accept(int sock)
  79 {
  80     struct sockaddr_un addr;
  81     socklen_t addrlen;
  82     int ret;
  83     struct timeval timeout = { .tv_sec = SOCKET_TIMEOUT,
  84                                .tv_usec = 0 };
  85
  86     setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, (void *)&timeout,
  87                sizeof(timeout));
  88
  89     do {
  90         addrlen = sizeof(addr);
  91         ret = accept(sock, (struct sockaddr *)&addr, &addrlen);
  92     } while (ret == -1 && errno == EINTR);
  93     if (ret == -1) {
  94         fprintf(stderr, "%s failed: %s\n", __func__, strerror(errno));
  95     }
  96     close(sock);
  97
  98     return ret;
  99 }
 100
 101 bool qtest_probe_child(QTestState *s)
 102 {
 103     pid_t pid = s->qemu_pid;
 104
 105     if (pid != -1) {
 106         pid = waitpid(pid, &s->wstatus, WNOHANG);
 107         if (pid == 0) {
 108             return true;
 109         }
 110         s->qemu_pid = -1;
 111     }
 112     return false;
 113 }
 114
 115 void qtest_set_expected_status(QTestState *s, int status)
 116 {
 117     s->expected_status = status;
 118 }
 119
 120 static void kill_qemu(QTestState *s)
 121 {
 122     pid_t pid = s->qemu_pid;
 123     int wstatus;
 124
 125     /* Skip wait if qtest_probe_child already reaped.  */
 126     if (pid != -1) {
 127         kill(pid, SIGTERM);
 128         TFR(pid = waitpid(s->qemu_pid, &s->wstatus, 0));
 129         assert(pid == s->qemu_pid);
 130     }
 131
 132     /*
 133      * Check whether qemu exited with expected exit status; anything else is
 134      * fishy and should be logged with as much detail as possible.
 135      */
 136     wstatus = s->wstatus;
 137     if (WIFEXITED(wstatus) && WEXITSTATUS(wstatus) != s->expected_status) {
 138         fprintf(stderr, "%s:%d: kill_qemu() tried to terminate QEMU "
 139                 "process but encountered exit status %d (expected %d)\n",
 140                 __FILE__, __LINE__, WEXITSTATUS(wstatus), s->expected_status);
 141         abort();
 142     } else if (WIFSIGNALED(wstatus)) {
 143         int sig = WTERMSIG(wstatus);
 144         const char *signame = strsignal(sig) ?: "unknown ???";
 145         const char *dump = WCOREDUMP(wstatus) ? " (core dumped)" : "";
 146
 147         fprintf(stderr, "%s:%d: kill_qemu() detected QEMU death "
 148                 "from signal %d (%s)%s\n",
 149                 __FILE__, __LINE__, sig, signame, dump);
 150         abort();
 151     }
 152 }
 153
 154 static void kill_qemu_hook_func(void *s)
 155 {
 156     kill_qemu(s);
 157 }
 158
 159 static void sigabrt_handler(int signo)
 160 {
 161     g_hook_list_invoke(&abrt_hooks, FALSE);
 162 }
 163
 164 static void setup_sigabrt_handler(void)
 165 {
 166     struct sigaction sigact;
 167
 168     /* Catch SIGABRT to clean up on g_assert() failure */
 169     sigact = (struct sigaction){
 170         .sa_handler = sigabrt_handler,
 171         .sa_flags = SA_RESETHAND,
 172     };
 173     sigemptyset(&sigact.sa_mask);
 174     sigaction(SIGABRT, &sigact, &sigact_old);
 175 }
 176
 177 static void cleanup_sigabrt_handler(void)
 178 {
 179     sigaction(SIGABRT, &sigact_old, NULL);
 180 }
 181
 182 void qtest_add_abrt_handler(GHookFunc fn, const void *data)
 183 {
 184     GHook *hook;
 185
 186     /* Only install SIGABRT handler once */
 187     if (!abrt_hooks.is_setup) {
 188         g_hook_list_init(&abrt_hooks, sizeof(GHook));
 189     }
 190     setup_sigabrt_handler();
 191
 192     hook = g_hook_alloc(&abrt_hooks);
 193     hook->func = fn;
 194     hook->data = (void *)data;
 195
 196     g_hook_prepend(&abrt_hooks, hook);
 197 }
 198
 199 static const char *qtest_qemu_binary(void)
 200 {
 201     const char *qemu_bin;
 202
 203     qemu_bin = getenv("QTEST_QEMU_BINARY");
 204     if (!qemu_bin) {
 205         fprintf(stderr, "Environment variable QTEST_QEMU_BINARY required\n");
 206         exit(1);
 207     }
 208
 209     return qemu_bin;
 210 }
 211
 212 QTestState *qtest_init_without_qmp_handshake(const char *extra_args)
 213 {
 214     QTestState *s;
 215     int sock, qmpsock, i;
 216     gchar *socket_path;
 217     gchar *qmp_socket_path;
 218     gchar *command;
 219     const char *qemu_binary = qtest_qemu_binary();
 220
 221     s = g_new(QTestState, 1);
 222
 223     socket_path = g_strdup_printf("/tmp/qtest-%d.sock", getpid());
 224     qmp_socket_path = g_strdup_printf("/tmp/qtest-%d.qmp", getpid());
 225
 226     /* It's possible that if an earlier test run crashed it might
 227      * have left a stale unix socket lying around. Delete any
 228      * stale old socket to avoid spurious test failures with
 229      * tests/libqtest.c:70:init_socket: assertion failed (ret != -1): (-1 != -1)
 230      */
 231     unlink(socket_path);
 232     unlink(qmp_socket_path);
 233
 234     sock = init_socket(socket_path);
 235     qmpsock = init_socket(qmp_socket_path);
 236
 237     qtest_add_abrt_handler(kill_qemu_hook_func, s);
 238
 239     command = g_strdup_printf("exec %s "
 240                               "-qtest unix:%s "
 241                               "-qtest-log %s "
 242                               "-chardev socket,path=%s,id=char0 "
 243                               "-mon chardev=char0,mode=control "
 244                               "-machine accel=qtest "
 245                               "-display none "
 246                               "%s", qemu_binary, socket_path,
 247                               getenv("QTEST_LOG") ? "/dev/fd/2" : "/dev/null",
 248                               qmp_socket_path,
 249                               extra_args ?: "");
 250
 251     g_test_message("starting QEMU: %s", command);
 252
 253     s->wstatus = 0;
 254     s->expected_status = 0;
 255     s->qemu_pid = fork();
 256     if (s->qemu_pid == 0) {
 257         setenv("QEMU_AUDIO_DRV", "none", true);
 258         execlp("/bin/sh", "sh", "-c", command, NULL);
 259         exit(1);
 260     }
 261
 262     g_free(command);
 263     s->fd = socket_accept(sock);
 264     if (s->fd >= 0) {
 265         s->qmp_fd = socket_accept(qmpsock);
 266     }
 267     unlink(socket_path);
 268     unlink(qmp_socket_path);
 269     g_free(socket_path);
 270     g_free(qmp_socket_path);
 271
 272     g_assert(s->fd >= 0 && s->qmp_fd >= 0);
 273
 274     s->rx = g_string_new("");
 275     for (i = 0; i < MAX_IRQ; i++) {
 276         s->irq_level[i] = false;
 277     }
 278
 279     if (getenv("QTEST_STOP")) {
 280         kill(s->qemu_pid, SIGSTOP);
 281     }
 282
 283     /* ask endianness of the target */
 284
 285     s->big_endian = qtest_query_target_endianness(s);
 286
 287     return s;
 288 }
 289
 290 QTestState *qtest_init(const char *extra_args)
 291 {
 292     QTestState *s = qtest_init_without_qmp_handshake(extra_args);
 293     QDict *greeting;
 294
 295     /* Read the QMP greeting and then do the handshake */
 296     greeting = qtest_qmp_receive(s);
 297     qobject_unref(greeting);
 298     qobject_unref(qtest_qmp(s, "{ 'execute': 'qmp_capabilities' }"));
 299
 300     return s;
 301 }
 302
 303 QTestState *qtest_vinitf(const char *fmt, va_list ap)
 304 {
 305     char *args = g_strdup_vprintf(fmt, ap);
 306     QTestState *s;
 307
 308     s = qtest_init(args);
 309     g_free(args);
 310     return s;
 311 }
 312
 313 QTestState *qtest_initf(const char *fmt, ...)
 314 {
 315     va_list ap;
 316     QTestState *s;
 317
 318     va_start(ap, fmt);
 319     s = qtest_vinitf(fmt, ap);
 320     va_end(ap);
 321     return s;
 322 }
 323
 324 QTestState *qtest_init_with_serial(const char *extra_args, int *sock_fd)
 325 {
 326     int sock_fd_init;
 327     char *sock_path, sock_dir[] = "/tmp/qtest-serial-XXXXXX";
 328     QTestState *qts;
 329
 330     g_assert_true(mkdtemp(sock_dir) != NULL);
 331     sock_path = g_strdup_printf("%s/sock", sock_dir);
 332
 333     sock_fd_init = init_socket(sock_path);
 334
 335     qts = qtest_initf("-chardev socket,id=s0,path=%s -serial chardev:s0 %s",
 336                       sock_path, extra_args);
 337
 338     *sock_fd = socket_accept(sock_fd_init);
 339
 340     unlink(sock_path);
 341     g_free(sock_path);
 342     rmdir(sock_dir);
 343
 344     g_assert_true(*sock_fd >= 0);
 345
 346     return qts;
 347 }
 348
 349 void qtest_quit(QTestState *s)
 350 {
 351     g_hook_destroy_link(&abrt_hooks, g_hook_find_data(&abrt_hooks, TRUE, s));
 352
 353     /* Uninstall SIGABRT handler on last instance */
 354     cleanup_sigabrt_handler();
 355
 356     kill_qemu(s);
 357     close(s->fd);
 358     close(s->qmp_fd);
 359     g_string_free(s->rx, true);
 360     g_free(s);
 361 }
 362
 363 static void socket_send(int fd, const char *buf, size_t size)
 364 {
 365     size_t offset;
 366
 367     offset = 0;
 368     while (offset < size) {
 369         ssize_t len;
 370
 371         len = write(fd, buf + offset, size - offset);
 372         if (len == -1 && errno == EINTR) {
 373             continue;
 374         }
 375
 376         g_assert_cmpint(len, >, 0);
 377
 378         offset += len;
 379     }
 380 }
 381
 382 static void socket_sendf(int fd, const char *fmt, va_list ap)
 383 {
 384     gchar *str = g_strdup_vprintf(fmt, ap);
 385     size_t size = strlen(str);
 386
 387     socket_send(fd, str, size);
 388     g_free(str);
 389 }
 390
 391 static void GCC_FMT_ATTR(2, 3) qtest_sendf(QTestState *s, const char *fmt, ...)
 392 {
 393     va_list ap;
 394
 395     va_start(ap, fmt);
 396     socket_sendf(s->fd, fmt, ap);
 397     va_end(ap);
 398 }
 399
 400 /* Sends a message and file descriptors to the socket.
 401  * It's needed for qmp-commands like getfd/add-fd */
 402 static void socket_send_fds(int socket_fd, int *fds, size_t fds_num,
 403                             const char *buf, size_t buf_size)
 404 {
 405     ssize_t ret;
 406     struct msghdr msg = { 0 };
 407     char control[CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS)] = { 0 };
 408     size_t fdsize = sizeof(int) * fds_num;
 409     struct cmsghdr *cmsg;
 410     struct iovec iov = { .iov_base = (char *)buf, .iov_len = buf_size };
 411
 412     msg.msg_iov = &iov;
 413     msg.msg_iovlen = 1;
 414
 415     if (fds && fds_num > 0) {
 416         g_assert_cmpuint(fds_num, <, SOCKET_MAX_FDS);
 417
 418         msg.msg_control = control;
 419         msg.msg_controllen = CMSG_SPACE(fdsize);
 420
 421         cmsg = CMSG_FIRSTHDR(&msg);
 422         cmsg->cmsg_len = CMSG_LEN(fdsize);
 423         cmsg->cmsg_level = SOL_SOCKET;
 424         cmsg->cmsg_type = SCM_RIGHTS;
 425         memcpy(CMSG_DATA(cmsg), fds, fdsize);
 426     }
 427
 428     do {
 429         ret = sendmsg(socket_fd, &msg, 0);
 430     } while (ret < 0 && errno == EINTR);
 431     g_assert_cmpint(ret, >, 0);
 432 }
 433
 434 static GString *qtest_recv_line(QTestState *s)
 435 {
 436     GString *line;
 437     size_t offset;
 438     char *eol;
 439
 440     while ((eol = strchr(s->rx->str, '\n')) == NULL) {
 441         ssize_t len;
 442         char buffer[1024];
 443
 444         len = read(s->fd, buffer, sizeof(buffer));
 445         if (len == -1 && errno == EINTR) {
 446             continue;
 447         }
 448
 449         if (len == -1 || len == 0) {
 450             fprintf(stderr, "Broken pipe\n");
 451             abort();
 452         }
 453
 454         g_string_append_len(s->rx, buffer, len);
 455     }
 456
 457     offset = eol - s->rx->str;
 458     line = g_string_new_len(s->rx->str, offset);
 459     g_string_erase(s->rx, 0, offset + 1);
 460
 461     return line;
 462 }
 463
 464 static gchar **qtest_rsp(QTestState *s, int expected_args)
 465 {
 466     GString *line;
 467     gchar **words;
 468     int i;
 469
 470 redo:
 471     line = qtest_recv_line(s);
 472     words = g_strsplit(line->str, " ", 0);
 473     g_string_free(line, TRUE);
 474
 475     if (strcmp(words[0], "IRQ") == 0) {
 476         long irq;
 477         int ret;
 478
 479         g_assert(words[1] != NULL);
 480         g_assert(words[2] != NULL);
 481
 482         ret = qemu_strtol(words[2], NULL, 0, &irq);
 483         g_assert(!ret);
 484         g_assert_cmpint(irq, >=, 0);
 485         g_assert_cmpint(irq, <, MAX_IRQ);
 486
 487         if (strcmp(words[1], "raise") == 0) {
 488             s->irq_level[irq] = true;
 489         } else {
 490             s->irq_level[irq] = false;
 491         }
 492
 493         g_strfreev(words);
 494         goto redo;
 495     }
 496
 497     g_assert(words[0] != NULL);
 498     g_assert_cmpstr(words[0], ==, "OK");
 499
 500     if (expected_args) {
 501         for (i = 0; i < expected_args; i++) {
 502             g_assert(words[i] != NULL);
 503         }
 504     } else {
 505         g_strfreev(words);
 506     }
 507
 508     return words;
 509 }
 510
 511 static int qtest_query_target_endianness(QTestState *s)
 512 {
 513     gchar **args;
 514     int big_endian;
 515
 516     qtest_sendf(s, "endianness\n");
 517     args = qtest_rsp(s, 1);
 518     g_assert(strcmp(args[1], "big") == 0 || strcmp(args[1], "little") == 0);
 519     big_endian = strcmp(args[1], "big") == 0;
 520     g_strfreev(args);
 521
 522     return big_endian;
 523 }
 524
 525 typedef struct {
 526     JSONMessageParser parser;
 527     QDict *response;
 528 } QMPResponseParser;
 529
 530 static void qmp_response(void *opaque, QObject *obj, Error *err)
 531 {
 532     QMPResponseParser *qmp = opaque;
 533
 534     assert(!obj != !err);
 535
 536     if (err) {
 537         error_prepend(&err, "QMP JSON response parsing failed: ");
 538         error_report_err(err);
 539         abort();
 540     }
 541
 542     g_assert(!qmp->response);
 543     qmp->response = qobject_to(QDict, obj);
 544     g_assert(qmp->response);
 545 }
 546
 547 QDict *qmp_fd_receive(int fd)
 548 {
 549     QMPResponseParser qmp;
 550     bool log = getenv("QTEST_LOG") != NULL;
 551
 552     qmp.response = NULL;
 553     json_message_parser_init(&qmp.parser, qmp_response, &qmp, NULL);
 554     while (!qmp.response) {
 555         ssize_t len;
 556         char c;
 557
 558         len = read(fd, &c, 1);
 559         if (len == -1 && errno == EINTR) {
 560             continue;
 561         }
 562
 563         if (len == -1 || len == 0) {
 564             fprintf(stderr, "Broken pipe\n");
 565             abort();
 566         }
 567
 568         if (log) {
 569             len = write(2, &c, 1);
 570         }
 571         json_message_parser_feed(&qmp.parser, &c, 1);
 572     }
 573     json_message_parser_destroy(&qmp.parser);
 574
 575     return qmp.response;
 576 }
 577
 578 QDict *qtest_qmp_receive(QTestState *s)
 579 {
 580     return qmp_fd_receive(s->qmp_fd);
 581 }
 582
 583 /**
 584  * Allow users to send a message without waiting for the reply,
 585  * in the case that they choose to discard all replies up until
 586  * a particular EVENT is received.
 587  */
 588 void qmp_fd_vsend_fds(int fd, int *fds, size_t fds_num,
 589                       const char *fmt, va_list ap)
 590 {
 591     QObject *qobj;
 592
 593     /* Going through qobject ensures we escape strings properly */
 594     qobj = qobject_from_vjsonf_nofail(fmt, ap);
 595
 596     /* No need to send anything for an empty QObject.  */
 597     if (qobj) {
 598         int log = getenv("QTEST_LOG") != NULL;
 599         QString *qstr = qobject_to_json(qobj);
 600         const char *str;
 601
 602         /*
 603          * BUG: QMP doesn't react to input until it sees a newline, an
 604          * object, or an array.  Work-around: give it a newline.
 605          */
 606         qstring_append_chr(qstr, '\n');
 607         str = qstring_get_str(qstr);
 608
 609         if (log) {
 610             fprintf(stderr, "%s", str);
 611         }
 612         /* Send QMP request */
 613         if (fds && fds_num > 0) {
 614             socket_send_fds(fd, fds, fds_num, str, qstring_get_length(qstr));
 615         } else {
 616             socket_send(fd, str, qstring_get_length(qstr));
 617         }
 618
 619         qobject_unref(qstr);
 620         qobject_unref(qobj);
 621     }
 622 }
 623
 624 void qmp_fd_vsend(int fd, const char *fmt, va_list ap)
 625 {
 626     qmp_fd_vsend_fds(fd, NULL, 0, fmt, ap);
 627 }
 628
 629 void qtest_qmp_vsend_fds(QTestState *s, int *fds, size_t fds_num,
 630                          const char *fmt, va_list ap)
 631 {
 632     qmp_fd_vsend_fds(s->qmp_fd, fds, fds_num, fmt, ap);
 633 }
 634
 635 void qtest_qmp_vsend(QTestState *s, const char *fmt, va_list ap)
 636 {
 637     qmp_fd_vsend_fds(s->qmp_fd, NULL, 0, fmt, ap);
 638 }
 639
 640 QDict *qmp_fdv(int fd, const char *fmt, va_list ap)
 641 {
 642     qmp_fd_vsend_fds(fd, NULL, 0, fmt, ap);
 643
 644     return qmp_fd_receive(fd);
 645 }
 646
 647 QDict *qtest_vqmp_fds(QTestState *s, int *fds, size_t fds_num,
 648                       const char *fmt, va_list ap)
 649 {
 650     qtest_qmp_vsend_fds(s, fds, fds_num, fmt, ap);
 651
 652     /* Receive reply */
 653     return qtest_qmp_receive(s);
 654 }
 655
 656 QDict *qtest_vqmp(QTestState *s, const char *fmt, va_list ap)
 657 {
 658     qtest_qmp_vsend(s, fmt, ap);
 659
 660     /* Receive reply */
 661     return qtest_qmp_receive(s);
 662 }
 663
 664 QDict *qmp_fd(int fd, const char *fmt, ...)
 665 {
 666     va_list ap;
 667     QDict *response;
 668
 669     va_start(ap, fmt);
 670     response = qmp_fdv(fd, fmt, ap);
 671     va_end(ap);
 672     return response;
 673 }
 674
 675 void qmp_fd_send(int fd, const char *fmt, ...)
 676 {
 677     va_list ap;
 678
 679     va_start(ap, fmt);
 680     qmp_fd_vsend(fd, fmt, ap);
 681     va_end(ap);
 682 }
 683
 684 QDict *qtest_qmp_fds(QTestState *s, int *fds, size_t fds_num,
 685                      const char *fmt, ...)
 686 {
 687     va_list ap;
 688     QDict *response;
 689
 690     va_start(ap, fmt);
 691     response = qtest_vqmp_fds(s, fds, fds_num, fmt, ap);
 692     va_end(ap);
 693     return response;
 694 }
 695
 696 QDict *qtest_qmp(QTestState *s, const char *fmt, ...)
 697 {
 698     va_list ap;
 699     QDict *response;
 700
 701     va_start(ap, fmt);
 702     response = qtest_vqmp(s, fmt, ap);
 703     va_end(ap);
 704     return response;
 705 }
 706
 707 void qtest_qmp_send(QTestState *s, const char *fmt, ...)
 708 {
 709     va_list ap;
 710
 711     va_start(ap, fmt);
 712     qtest_qmp_vsend(s, fmt, ap);
 713     va_end(ap);
 714 }
 715
 716 void qmp_fd_vsend_raw(int fd, const char *fmt, va_list ap)
 717 {
 718     bool log = getenv("QTEST_LOG") != NULL;
 719     char *str = g_strdup_vprintf(fmt, ap);
 720
 721     if (log) {
 722         fprintf(stderr, "%s", str);
 723     }
 724     socket_send(fd, str, strlen(str));
 725     g_free(str);
 726 }
 727
 728 void qmp_fd_send_raw(int fd, const char *fmt, ...)
 729 {
 730     va_list ap;
 731
 732     va_start(ap, fmt);
 733     qmp_fd_vsend_raw(fd, fmt, ap);
 734     va_end(ap);
 735 }
 736
 737 void qtest_qmp_send_raw(QTestState *s, const char *fmt, ...)
 738 {
 739     va_list ap;
 740
 741     va_start(ap, fmt);
 742     qmp_fd_vsend_raw(s->qmp_fd, fmt, ap);
 743     va_end(ap);
 744 }
 745
 746 QDict *qtest_qmp_eventwait_ref(QTestState *s, const char *event)
 747 {
 748     QDict *response;
 749
 750     for (;;) {
 751         response = qtest_qmp_receive(s);
 752         if ((qdict_haskey(response, "event")) &&
 753             (strcmp(qdict_get_str(response, "event"), event) == 0)) {
 754             return response;
 755         }
 756         qobject_unref(response);
 757     }
 758 }
 759
 760 void qtest_qmp_eventwait(QTestState *s, const char *event)
 761 {
 762     QDict *response;
 763
 764     response = qtest_qmp_eventwait_ref(s, event);
 765     qobject_unref(response);
 766 }
 767
 768 char *qtest_vhmp(QTestState *s, const char *fmt, va_list ap)
 769 {
 770     char *cmd;
 771     QDict *resp;
 772     char *ret;
 773
 774     cmd = g_strdup_vprintf(fmt, ap);
 775     resp = qtest_qmp(s, "{'execute': 'human-monitor-command',"
 776                      " 'arguments': {'command-line': %s}}",
 777                      cmd);
 778     ret = g_strdup(qdict_get_try_str(resp, "return"));
 779     while (ret == NULL && qdict_get_try_str(resp, "event")) {
 780         /* Ignore asynchronous QMP events */
 781         qobject_unref(resp);
 782         resp = qtest_qmp_receive(s);
 783         ret = g_strdup(qdict_get_try_str(resp, "return"));
 784     }
 785     g_assert(ret);
 786     qobject_unref(resp);
 787     g_free(cmd);
 788     return ret;
 789 }
 790
 791 char *qtest_hmp(QTestState *s, const char *fmt, ...)
 792 {
 793     va_list ap;
 794     char *ret;
 795
 796     va_start(ap, fmt);
 797     ret = qtest_vhmp(s, fmt, ap);
 798     va_end(ap);
 799     return ret;
 800 }
 801
 802 const char *qtest_get_arch(void)
 803 {
 804     const char *qemu = qtest_qemu_binary();
 805     const char *end = strrchr(qemu, '/');
 806
 807     return end + strlen("/qemu-system-");
 808 }
 809
 810 bool qtest_get_irq(QTestState *s, int num)
 811 {
 812     /* dummy operation in order to make sure irq is up to date */
 813     qtest_inb(s, 0);
 814
 815     return s->irq_level[num];
 816 }
 817
 818 void qtest_module_load(QTestState *s, const char *prefix, const char *libname)
 819 {
 820     qtest_sendf(s, "module_load %s %s\n", prefix, libname);
 821     qtest_rsp(s, 0);
 822 }
 823
 824 static int64_t qtest_clock_rsp(QTestState *s)
 825 {
 826     gchar **words;
 827     int64_t clock;
 828     words = qtest_rsp(s, 2);
 829     clock = g_ascii_strtoll(words[1], NULL, 0);
 830     g_strfreev(words);
 831     return clock;
 832 }
 833
 834 int64_t qtest_clock_step_next(QTestState *s)
 835 {
 836     qtest_sendf(s, "clock_step\n");
 837     return qtest_clock_rsp(s);
 838 }
 839
 840 int64_t qtest_clock_step(QTestState *s, int64_t step)
 841 {
 842     qtest_sendf(s, "clock_step %"PRIi64"\n", step);
 843     return qtest_clock_rsp(s);
 844 }
 845
 846 int64_t qtest_clock_set(QTestState *s, int64_t val)
 847 {
 848     qtest_sendf(s, "clock_set %"PRIi64"\n", val);
 849     return qtest_clock_rsp(s);
 850 }
 851
 852 void qtest_irq_intercept_out(QTestState *s, const char *qom_path)
 853 {
 854     qtest_sendf(s, "irq_intercept_out %s\n", qom_path);
 855     qtest_rsp(s, 0);
 856 }
 857
 858 void qtest_irq_intercept_in(QTestState *s, const char *qom_path)
 859 {
 860     qtest_sendf(s, "irq_intercept_in %s\n", qom_path);
 861     qtest_rsp(s, 0);
 862 }
 863
 864 void qtest_set_irq_in(QTestState *s, const char *qom_path, const char *name,
 865                       int num, int level)
 866 {
 867     if (!name) {
 868         name = "unnamed-gpio-in";
 869     }
 870     qtest_sendf(s, "set_irq_in %s %s %d %d\n", qom_path, name, num, level);
 871     qtest_rsp(s, 0);
 872 }
 873
 874 static void qtest_out(QTestState *s, const char *cmd, uint16_t addr, uint32_t value)
 875 {
 876     qtest_sendf(s, "%s 0x%x 0x%x\n", cmd, addr, value);
 877     qtest_rsp(s, 0);
 878 }
 879
 880 void qtest_outb(QTestState *s, uint16_t addr, uint8_t value)
 881 {
 882     qtest_out(s, "outb", addr, value);
 883 }
 884
 885 void qtest_outw(QTestState *s, uint16_t addr, uint16_t value)
 886 {
 887     qtest_out(s, "outw", addr, value);
 888 }
 889
 890 void qtest_outl(QTestState *s, uint16_t addr, uint32_t value)
 891 {
 892     qtest_out(s, "outl", addr, value);
 893 }
 894
 895 static uint32_t qtest_in(QTestState *s, const char *cmd, uint16_t addr)
 896 {
 897     gchar **args;
 898     int ret;
 899     unsigned long value;
 900
 901     qtest_sendf(s, "%s 0x%x\n", cmd, addr);
 902     args = qtest_rsp(s, 2);
 903     ret = qemu_strtoul(args[1], NULL, 0, &value);
 904     g_assert(!ret && value <= UINT32_MAX);
 905     g_strfreev(args);
 906
 907     return value;
 908 }
 909
 910 uint8_t qtest_inb(QTestState *s, uint16_t addr)
 911 {
 912     return qtest_in(s, "inb", addr);
 913 }
 914
 915 uint16_t qtest_inw(QTestState *s, uint16_t addr)
 916 {
 917     return qtest_in(s, "inw", addr);
 918 }
 919
 920 uint32_t qtest_inl(QTestState *s, uint16_t addr)
 921 {
 922     return qtest_in(s, "inl", addr);
 923 }
 924
 925 static void qtest_write(QTestState *s, const char *cmd, uint64_t addr,
 926                         uint64_t value)
 927 {
 928     qtest_sendf(s, "%s 0x%" PRIx64 " 0x%" PRIx64 "\n", cmd, addr, value);
 929     qtest_rsp(s, 0);
 930 }
 931
 932 void qtest_writeb(QTestState *s, uint64_t addr, uint8_t value)
 933 {
 934     qtest_write(s, "writeb", addr, value);
 935 }
 936
 937 void qtest_writew(QTestState *s, uint64_t addr, uint16_t value)
 938 {
 939     qtest_write(s, "writew", addr, value);
 940 }
 941
 942 void qtest_writel(QTestState *s, uint64_t addr, uint32_t value)
 943 {
 944     qtest_write(s, "writel", addr, value);
 945 }
 946
 947 void qtest_writeq(QTestState *s, uint64_t addr, uint64_t value)
 948 {
 949     qtest_write(s, "writeq", addr, value);
 950 }
 951
 952 static uint64_t qtest_read(QTestState *s, const char *cmd, uint64_t addr)
 953 {
 954     gchar **args;
 955     int ret;
 956     uint64_t value;
 957
 958     qtest_sendf(s, "%s 0x%" PRIx64 "\n", cmd, addr);
 959     args = qtest_rsp(s, 2);
 960     ret = qemu_strtou64(args[1], NULL, 0, &value);
 961     g_assert(!ret);
 962     g_strfreev(args);
 963
 964     return value;
 965 }
 966
 967 uint8_t qtest_readb(QTestState *s, uint64_t addr)
 968 {
 969     return qtest_read(s, "readb", addr);
 970 }
 971
 972 uint16_t qtest_readw(QTestState *s, uint64_t addr)
 973 {
 974     return qtest_read(s, "readw", addr);
 975 }
 976
 977 uint32_t qtest_readl(QTestState *s, uint64_t addr)
 978 {
 979     return qtest_read(s, "readl", addr);
 980 }
 981
 982 uint64_t qtest_readq(QTestState *s, uint64_t addr)
 983 {
 984     return qtest_read(s, "readq", addr);
 985 }
 986
 987 static int hex2nib(char ch)
 988 {
 989     if (ch >= '0' && ch <= '9') {
 990         return ch - '0';
 991     } else if (ch >= 'a' && ch <= 'f') {
 992         return 10 + (ch - 'a');
 993     } else if (ch >= 'A' && ch <= 'F') {
 994         return 10 + (ch - 'a');
 995     } else {
 996         return -1;
 997     }
 998 }
 999
1000 void qtest_memread(QTestState *s, uint64_t addr, void *data, size_t size)
1001 {
1002     uint8_t *ptr = data;
1003     gchar **args;
1004     size_t i;
1005
1006     if (!size) {
1007         return;
1008     }
1009
1010     qtest_sendf(s, "read 0x%" PRIx64 " 0x%zx\n", addr, size);
1011     args = qtest_rsp(s, 2);
1012
1013     for (i = 0; i < size; i++) {
1014         ptr[i] = hex2nib(args[1][2 + (i * 2)]) << 4;
1015         ptr[i] |= hex2nib(args[1][2 + (i * 2) + 1]);
1016     }
1017
1018     g_strfreev(args);
1019 }
1020
1021 uint64_t qtest_rtas_call(QTestState *s, const char *name,
1022                          uint32_t nargs, uint64_t args,
1023                          uint32_t nret, uint64_t ret)
1024 {
1025     qtest_sendf(s, "rtas %s %u 0x%"PRIx64" %u 0x%"PRIx64"\n",
1026                 name, nargs, args, nret, ret);
1027     qtest_rsp(s, 0);
1028     return 0;
1029 }
1030
1031 void qtest_add_func(const char *str, void (*fn)(void))
1032 {
1033     gchar *path = g_strdup_printf("/%s/%s", qtest_get_arch(), str);
1034     g_test_add_func(path, fn);
1035     g_free(path);
1036 }
1037
1038 void qtest_add_data_func_full(const char *str, void *data,
1039                               void (*fn)(const void *),
1040                               GDestroyNotify data_free_func)
1041 {
1042     gchar *path = g_strdup_printf("/%s/%s", qtest_get_arch(), str);
1043     g_test_add_data_func_full(path, data, fn, data_free_func);
1044     g_free(path);
1045 }
1046
1047 void qtest_add_data_func(const char *str, const void *data,
1048                          void (*fn)(const void *))
1049 {
1050     gchar *path = g_strdup_printf("/%s/%s", qtest_get_arch(), str);
1051     g_test_add_data_func(path, data, fn);
1052     g_free(path);
1053 }
1054
1055 void qtest_bufwrite(QTestState *s, uint64_t addr, const void *data, size_t size)
1056 {
1057     gchar *bdata;
1058
1059     bdata = g_base64_encode(data, size);
1060     qtest_sendf(s, "b64write 0x%" PRIx64 " 0x%zx ", addr, size);
1061     socket_send(s->fd, bdata, strlen(bdata));
1062     socket_send(s->fd, "\n", 1);
1063     qtest_rsp(s, 0);
1064     g_free(bdata);
1065 }
1066
1067 void qtest_bufread(QTestState *s, uint64_t addr, void *data, size_t size)
1068 {
1069     gchar **args;
1070     size_t len;
1071
1072     qtest_sendf(s, "b64read 0x%" PRIx64 " 0x%zx\n", addr, size);
1073     args = qtest_rsp(s, 2);
1074
1075     g_base64_decode_inplace(args[1], &len);
1076     if (size != len) {
1077         fprintf(stderr, "bufread: asked for %zu bytes but decoded %zu\n",
1078                 size, len);
1079         len = MIN(len, size);
1080     }
1081
1082     memcpy(data, args[1], len);
1083     g_strfreev(args);
1084 }
1085
1086 void qtest_memwrite(QTestState *s, uint64_t addr, const void *data, size_t size)
1087 {
1088     const uint8_t *ptr = data;
1089     size_t i;
1090     char *enc;
1091
1092     if (!size) {
1093         return;
1094     }
1095
1096     enc = g_malloc(2 * size + 1);
1097
1098     for (i = 0; i < size; i++) {
1099         sprintf(&enc[i * 2], "%02x", ptr[i]);
1100     }
1101
1102     qtest_sendf(s, "write 0x%" PRIx64 " 0x%zx 0x%s\n", addr, size, enc);
1103     qtest_rsp(s, 0);
1104     g_free(enc);
1105 }
1106
1107 void qtest_memset(QTestState *s, uint64_t addr, uint8_t pattern, size_t size)
1108 {
1109     qtest_sendf(s, "memset 0x%" PRIx64 " 0x%zx 0x%02x\n", addr, size, pattern);
1110     qtest_rsp(s, 0);
1111 }
1112
1113 void qtest_qmp_assert_success(QTestState *qts, const char *fmt, ...)
1114 {
1115     va_list ap;
1116     QDict *response;
1117
1118     va_start(ap, fmt);
1119     response = qtest_vqmp(qts, fmt, ap);
1120     va_end(ap);
1121
1122     g_assert(response);
1123     if (!qdict_haskey(response, "return")) {
1124         QString *s = qobject_to_json_pretty(QOBJECT(response));
1125         g_test_message("%s", qstring_get_str(s));
1126         qobject_unref(s);
1127     }
1128     g_assert(qdict_haskey(response, "return"));
1129     qobject_unref(response);
1130 }
1131
1132 bool qtest_big_endian(QTestState *s)
1133 {
1134     return s->big_endian;
1135 }
1136
1137 static bool qtest_check_machine_version(const char *mname, const char *basename,
1138                                         int major, int minor)
1139 {
1140     char *newname;
1141     bool is_equal;
1142
1143     newname = g_strdup_printf("%s-%i.%i", basename, major, minor);
1144     is_equal = g_str_equal(mname, newname);
1145     g_free(newname);
1146
1147     return is_equal;
1148 }
1149
1150 static bool qtest_is_old_versioned_machine(const char *mname)
1151 {
1152     const char *dash = strrchr(mname, '-');
1153     const char *dot = strrchr(mname, '.');
1154     const char *chr;
1155     char *bname;
1156     const int major = QEMU_VERSION_MAJOR;
1157     const int minor = QEMU_VERSION_MINOR;
1158     bool res = false;
1159
1160     if (dash && dot && dot > dash) {
1161         for (chr = dash + 1; *chr; chr++) {
1162             if (!qemu_isdigit(*chr) && *chr != '.') {
1163                 return false;
1164             }
1165         }
1166         /*
1167          * Now check if it is one of the latest versions. Check major + 1
1168          * and minor + 1 versions as well, since they might already exist
1169          * in the development branch.
1170          */
1171         bname = g_strdup(mname);
1172         bname[dash - mname] = 0;
1173         res = !qtest_check_machine_version(mname, bname, major + 1, 0) &&
1174               !qtest_check_machine_version(mname, bname, major, minor + 1) &&
1175               !qtest_check_machine_version(mname, bname, major, minor);
1176         g_free(bname);
1177     }
1178
1179     return res;
1180 }
1181
1182 void qtest_cb_for_every_machine(void (*cb)(const char *machine),
1183                                 bool skip_old_versioned)
1184 {
1185     QDict *response, *minfo;
1186     QList *list;
1187     const QListEntry *p;
1188     QObject *qobj;
1189     QString *qstr;
1190     const char *mname;
1191     QTestState *qts;
1192
1193     qts = qtest_init("-machine none");
1194     response = qtest_qmp(qts, "{ 'execute': 'query-machines' }");
1195     g_assert(response);
1196     list = qdict_get_qlist(response, "return");
1197     g_assert(list);
1198
1199     for (p = qlist_first(list); p; p = qlist_next(p)) {
1200         minfo = qobject_to(QDict, qlist_entry_obj(p));
1201         g_assert(minfo);
1202         qobj = qdict_get(minfo, "name");
1203         g_assert(qobj);
1204         qstr = qobject_to(QString, qobj);
1205         g_assert(qstr);
1206         mname = qstring_get_str(qstr);
1207         if (!skip_old_versioned || !qtest_is_old_versioned_machine(mname)) {
1208             cb(mname);
1209         }
1210     }
1211
1212     qtest_quit(qts);
1213     qobject_unref(response);
1214 }
1215
1216 QDict *qtest_qmp_receive_success(QTestState *s,
1217                                  void (*event_cb)(void *opaque,
1218                                                   const char *event,
1219                                                   QDict *data),
1220                                  void *opaque)
1221 {
1222     QDict *response, *ret, *data;
1223     const char *event;
1224
1225     for (;;) {
1226         response = qtest_qmp_receive(s);
1227         g_assert(!qdict_haskey(response, "error"));
1228         ret = qdict_get_qdict(response, "return");
1229         if (ret) {
1230             break;
1231         }
1232         event = qdict_get_str(response, "event");
1233         data = qdict_get_qdict(response, "data");
1234         if (event_cb) {
1235             event_cb(opaque, event, data);
1236         }
1237         qobject_unref(response);
1238     }
1239
1240     qobject_ref(ret);
1241     qobject_unref(response);
1242     return ret;
1243 }
1244
1245 /*
1246  * Generic hot-plugging test via the device_add QMP command.
1247  */
1248 void qtest_qmp_device_add(QTestState *qts, const char *driver, const char *id,
1249                           const char *fmt, ...)
1250 {
1251     QDict *args, *response;
1252     va_list ap;
1253
1254     va_start(ap, fmt);
1255     args = qdict_from_vjsonf_nofail(fmt, ap);
1256     va_end(ap);
1257
1258     g_assert(!qdict_haskey(args, "driver") && !qdict_haskey(args, "id"));
1259     qdict_put_str(args, "driver", driver);
1260     qdict_put_str(args, "id", id);
1261
1262     response = qtest_qmp(qts, "{'execute': 'device_add', 'arguments': %p}",
1263                          args);
1264     g_assert(response);
1265     g_assert(!qdict_haskey(response, "event")); /* We don't expect any events */
1266     g_assert(!qdict_haskey(response, "error"));
1267     qobject_unref(response);
1268 }
1269
1270 static void device_deleted_cb(void *opaque, const char *name, QDict *data)
1271 {
1272     bool *got_event = opaque;
1273
1274     g_assert_cmpstr(name, ==, "DEVICE_DELETED");
1275     *got_event = true;
1276 }
1277
1278 /*
1279  * Generic hot-unplugging test via the device_del QMP command.
1280  * Device deletion will get one response and one event. For example:
1281  *
1282  * {'execute': 'device_del','arguments': { 'id': 'scsi-hd'}}
1283  *
1284  * will get this one:
1285  *
1286  * {"timestamp": {"seconds": 1505289667, "microseconds": 569862},
1287  *  "event": "DEVICE_DELETED", "data": {"device": "scsi-hd",
1288  *  "path": "/machine/peripheral/scsi-hd"}}
1289  *
1290  * and this one:
1291  *
1292  * {"return": {}}
1293  *
1294  * But the order of arrival may vary - so we've got to detect both.
1295  */
1296 void qtest_qmp_device_del(QTestState *qts, const char *id)
1297 {
1298     bool got_event = false;
1299     QDict *rsp;
1300
1301     qtest_qmp_send(qts, "{'execute': 'device_del', 'arguments': {'id': %s}}",
1302                    id);
1303     rsp = qtest_qmp_receive_success(qts, device_deleted_cb, &got_event);
1304     qobject_unref(rsp);
1305     if (!got_event) {
1306         rsp = qtest_qmp_receive(qts);
1307         g_assert_cmpstr(qdict_get_try_str(rsp, "event"),
1308                         ==, "DEVICE_DELETED");
1309         qobject_unref(rsp);
1310     }
1311 }
1312
1313 bool qmp_rsp_is_err(QDict *rsp)
1314 {
1315     QDict *error = qdict_get_qdict(rsp, "error");
1316     qobject_unref(rsp);
1317     return !!error;
1318 }
1319
1320 void qmp_assert_error_class(QDict *rsp, const char *class)
1321 {
1322     QDict *error = qdict_get_qdict(rsp, "error");
1323
1324     g_assert_cmpstr(qdict_get_try_str(error, "class"), ==, class);
1325     g_assert_nonnull(qdict_get_try_str(error, "desc"));
1326     g_assert(!qdict_haskey(rsp, "return"));
1327
1328     qobject_unref(rsp);
1329 }