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