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 #include "libqtest.h"
  19
  20 #include <sys/socket.h>
  21 #include <sys/wait.h>
  22 #include <sys/un.h>
  23
  24 #include "qapi/error.h"
  25 #include "qapi/qmp/json-parser.h"
  26 #include "qapi/qmp/json-streamer.h"
  27 #include "qapi/qmp/qjson.h"
  28
  29 #define MAX_IRQ 256
  30 #define SOCKET_TIMEOUT 50
  31
  32 QTestState *global_qtest;
  33
  34 struct QTestState
  35 {
  36     int fd;
  37     int qmp_fd;
  38     bool irq_level[MAX_IRQ];
  39     GString *rx;
  40     pid_t qemu_pid;  /* our child QEMU process */
  41     bool big_endian;
  42 };
  43
  44 static GHookList abrt_hooks;
  45 static struct sigaction sigact_old;
  46
  47 #define g_assert_no_errno(ret) do { \
  48     g_assert_cmpint(ret, !=, -1); \
  49 } while (0)
  50
  51 static int qtest_query_target_endianness(QTestState *s);
  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     ret = listen(sock, 1);
  71     g_assert_no_errno(ret);
  72
  73     return sock;
  74 }
  75
  76 static int socket_accept(int sock)
  77 {
  78     struct sockaddr_un addr;
  79     socklen_t addrlen;
  80     int ret;
  81     struct timeval timeout = { .tv_sec = SOCKET_TIMEOUT,
  82                                .tv_usec = 0 };
  83
  84     setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, (void *)&timeout,
  85                sizeof(timeout));
  86
  87     do {
  88         addrlen = sizeof(addr);
  89         ret = accept(sock, (struct sockaddr *)&addr, &addrlen);
  90     } while (ret == -1 && errno == EINTR);
  91     if (ret == -1) {
  92         fprintf(stderr, "%s failed: %s\n", __func__, strerror(errno));
  93     }
  94     close(sock);
  95
  96     return ret;
  97 }
  98
  99 static void kill_qemu(QTestState *s)
 100 {
 101     if (s->qemu_pid != -1) {
 102         kill(s->qemu_pid, SIGTERM);
 103         waitpid(s->qemu_pid, NULL, 0);
 104     }
 105 }
 106
 107 static void kill_qemu_hook_func(void *s)
 108 {
 109     kill_qemu(s);
 110 }
 111
 112 static void sigabrt_handler(int signo)
 113 {
 114     g_hook_list_invoke(&abrt_hooks, FALSE);
 115 }
 116
 117 static void setup_sigabrt_handler(void)
 118 {
 119     struct sigaction sigact;
 120
 121     /* Catch SIGABRT to clean up on g_assert() failure */
 122     sigact = (struct sigaction){
 123         .sa_handler = sigabrt_handler,
 124         .sa_flags = SA_RESETHAND,
 125     };
 126     sigemptyset(&sigact.sa_mask);
 127     sigaction(SIGABRT, &sigact, &sigact_old);
 128 }
 129
 130 static void cleanup_sigabrt_handler(void)
 131 {
 132     sigaction(SIGABRT, &sigact_old, NULL);
 133 }
 134
 135 void qtest_add_abrt_handler(GHookFunc fn, const void *data)
 136 {
 137     GHook *hook;
 138
 139     /* Only install SIGABRT handler once */
 140     if (!abrt_hooks.is_setup) {
 141         g_hook_list_init(&abrt_hooks, sizeof(GHook));
 142     }
 143     setup_sigabrt_handler();
 144
 145     hook = g_hook_alloc(&abrt_hooks);
 146     hook->func = fn;
 147     hook->data = (void *)data;
 148
 149     g_hook_prepend(&abrt_hooks, hook);
 150 }
 151
 152 static const char *qtest_qemu_binary(void)
 153 {
 154     const char *qemu_bin;
 155
 156     qemu_bin = getenv("QTEST_QEMU_BINARY");
 157     if (!qemu_bin) {
 158         fprintf(stderr, "Environment variable QTEST_QEMU_BINARY required\n");
 159         exit(1);
 160     }
 161
 162     return qemu_bin;
 163 }
 164
 165 QTestState *qtest_init_without_qmp_handshake(const char *extra_args)
 166 {
 167     QTestState *s;
 168     int sock, qmpsock, i;
 169     gchar *socket_path;
 170     gchar *qmp_socket_path;
 171     gchar *command;
 172     const char *qemu_binary = qtest_qemu_binary();
 173
 174     s = g_new(QTestState, 1);
 175
 176     socket_path = g_strdup_printf("/tmp/qtest-%d.sock", getpid());
 177     qmp_socket_path = g_strdup_printf("/tmp/qtest-%d.qmp", getpid());
 178
 179     /* It's possible that if an earlier test run crashed it might
 180      * have left a stale unix socket lying around. Delete any
 181      * stale old socket to avoid spurious test failures with
 182      * tests/libqtest.c:70:init_socket: assertion failed (ret != -1): (-1 != -1)
 183      */
 184     unlink(socket_path);
 185     unlink(qmp_socket_path);
 186
 187     sock = init_socket(socket_path);
 188     qmpsock = init_socket(qmp_socket_path);
 189
 190     qtest_add_abrt_handler(kill_qemu_hook_func, s);
 191
 192     s->qemu_pid = fork();
 193     if (s->qemu_pid == 0) {
 194         setenv("QEMU_AUDIO_DRV", "none", true);
 195         command = g_strdup_printf("exec %s "
 196                                   "-qtest unix:%s,nowait "
 197                                   "-qtest-log %s "
 198                                   "-qmp unix:%s,nowait "
 199                                   "-machine accel=qtest "
 200                                   "-display none "
 201                                   "%s", qemu_binary, socket_path,
 202                                   getenv("QTEST_LOG") ? "/dev/fd/2" : "/dev/null",
 203                                   qmp_socket_path,
 204                                   extra_args ?: "");
 205         execlp("/bin/sh", "sh", "-c", command, NULL);
 206         exit(1);
 207     }
 208
 209     s->fd = socket_accept(sock);
 210     if (s->fd >= 0) {
 211         s->qmp_fd = socket_accept(qmpsock);
 212     }
 213     unlink(socket_path);
 214     unlink(qmp_socket_path);
 215     g_free(socket_path);
 216     g_free(qmp_socket_path);
 217
 218     g_assert(s->fd >= 0 && s->qmp_fd >= 0);
 219
 220     s->rx = g_string_new("");
 221     for (i = 0; i < MAX_IRQ; i++) {
 222         s->irq_level[i] = false;
 223     }
 224
 225     if (getenv("QTEST_STOP")) {
 226         kill(s->qemu_pid, SIGSTOP);
 227     }
 228
 229     /* ask endianness of the target */
 230
 231     s->big_endian = qtest_query_target_endianness(s);
 232
 233     return s;
 234 }
 235
 236 QTestState *qtest_init(const char *extra_args)
 237 {
 238     QTestState *s = qtest_init_without_qmp_handshake(extra_args);
 239
 240     /* Read the QMP greeting and then do the handshake */
 241     qtest_qmp_discard_response(s, "");
 242     qtest_qmp_discard_response(s, "{ 'execute': 'qmp_capabilities' }");
 243
 244     return s;
 245 }
 246
 247 QTestState *qtest_vstartf(const char *fmt, va_list ap)
 248 {
 249     char *args = g_strdup_vprintf(fmt, ap);
 250     QTestState *s;
 251
 252     s = qtest_start(args);
 253     g_free(args);
 254     global_qtest = NULL;
 255     return s;
 256 }
 257
 258 QTestState *qtest_startf(const char *fmt, ...)
 259 {
 260     va_list ap;
 261     QTestState *s;
 262
 263     va_start(ap, fmt);
 264     s = qtest_vstartf(fmt, ap);
 265     va_end(ap);
 266     return s;
 267 }
 268
 269 void qtest_quit(QTestState *s)
 270 {
 271     g_hook_destroy_link(&abrt_hooks, g_hook_find_data(&abrt_hooks, TRUE, s));
 272
 273     /* Uninstall SIGABRT handler on last instance */
 274     cleanup_sigabrt_handler();
 275
 276     kill_qemu(s);
 277     close(s->fd);
 278     close(s->qmp_fd);
 279     g_string_free(s->rx, true);
 280     g_free(s);
 281 }
 282
 283 static void socket_send(int fd, const char *buf, size_t size)
 284 {
 285     size_t offset;
 286
 287     offset = 0;
 288     while (offset < size) {
 289         ssize_t len;
 290
 291         len = write(fd, buf + offset, size - offset);
 292         if (len == -1 && errno == EINTR) {
 293             continue;
 294         }
 295
 296         g_assert_no_errno(len);
 297         g_assert_cmpint(len, >, 0);
 298
 299         offset += len;
 300     }
 301 }
 302
 303 static void socket_sendf(int fd, const char *fmt, va_list ap)
 304 {
 305     gchar *str = g_strdup_vprintf(fmt, ap);
 306     size_t size = strlen(str);
 307
 308     socket_send(fd, str, size);
 309     g_free(str);
 310 }
 311
 312 static void GCC_FMT_ATTR(2, 3) qtest_sendf(QTestState *s, const char *fmt, ...)
 313 {
 314     va_list ap;
 315
 316     va_start(ap, fmt);
 317     socket_sendf(s->fd, fmt, ap);
 318     va_end(ap);
 319 }
 320
 321 static GString *qtest_recv_line(QTestState *s)
 322 {
 323     GString *line;
 324     size_t offset;
 325     char *eol;
 326
 327     while ((eol = strchr(s->rx->str, '\n')) == NULL) {
 328         ssize_t len;
 329         char buffer[1024];
 330
 331         len = read(s->fd, buffer, sizeof(buffer));
 332         if (len == -1 && errno == EINTR) {
 333             continue;
 334         }
 335
 336         if (len == -1 || len == 0) {
 337             fprintf(stderr, "Broken pipe\n");
 338             exit(1);
 339         }
 340
 341         g_string_append_len(s->rx, buffer, len);
 342     }
 343
 344     offset = eol - s->rx->str;
 345     line = g_string_new_len(s->rx->str, offset);
 346     g_string_erase(s->rx, 0, offset + 1);
 347
 348     return line;
 349 }
 350
 351 static gchar **qtest_rsp(QTestState *s, int expected_args)
 352 {
 353     GString *line;
 354     gchar **words;
 355     int i;
 356
 357 redo:
 358     line = qtest_recv_line(s);
 359     words = g_strsplit(line->str, " ", 0);
 360     g_string_free(line, TRUE);
 361
 362     if (strcmp(words[0], "IRQ") == 0) {
 363         int irq;
 364
 365         g_assert(words[1] != NULL);
 366         g_assert(words[2] != NULL);
 367
 368         irq = strtoul(words[2], NULL, 0);
 369         g_assert_cmpint(irq, >=, 0);
 370         g_assert_cmpint(irq, <, MAX_IRQ);
 371
 372         if (strcmp(words[1], "raise") == 0) {
 373             s->irq_level[irq] = true;
 374         } else {
 375             s->irq_level[irq] = false;
 376         }
 377
 378         g_strfreev(words);
 379         goto redo;
 380     }
 381
 382     g_assert(words[0] != NULL);
 383     g_assert_cmpstr(words[0], ==, "OK");
 384
 385     if (expected_args) {
 386         for (i = 0; i < expected_args; i++) {
 387             g_assert(words[i] != NULL);
 388         }
 389     } else {
 390         g_strfreev(words);
 391     }
 392
 393     return words;
 394 }
 395
 396 static int qtest_query_target_endianness(QTestState *s)
 397 {
 398     gchar **args;
 399     int big_endian;
 400
 401     qtest_sendf(s, "endianness\n");
 402     args = qtest_rsp(s, 1);
 403     g_assert(strcmp(args[1], "big") == 0 || strcmp(args[1], "little") == 0);
 404     big_endian = strcmp(args[1], "big") == 0;
 405     g_strfreev(args);
 406
 407     return big_endian;
 408 }
 409
 410 typedef struct {
 411     JSONMessageParser parser;
 412     QDict *response;
 413 } QMPResponseParser;
 414
 415 static void qmp_response(JSONMessageParser *parser, GQueue *tokens)
 416 {
 417     QMPResponseParser *qmp = container_of(parser, QMPResponseParser, parser);
 418     QObject *obj;
 419
 420     obj = json_parser_parse(tokens, NULL);
 421     if (!obj) {
 422         fprintf(stderr, "QMP JSON response parsing failed\n");
 423         exit(1);
 424     }
 425
 426     g_assert(!qmp->response);
 427     qmp->response = qobject_to_qdict(obj);
 428     g_assert(qmp->response);
 429 }
 430
 431 QDict *qmp_fd_receive(int fd)
 432 {
 433     QMPResponseParser qmp;
 434     bool log = getenv("QTEST_LOG") != NULL;
 435
 436     qmp.response = NULL;
 437     json_message_parser_init(&qmp.parser, qmp_response);
 438     while (!qmp.response) {
 439         ssize_t len;
 440         char c;
 441
 442         len = read(fd, &c, 1);
 443         if (len == -1 && errno == EINTR) {
 444             continue;
 445         }
 446
 447         if (len == -1 || len == 0) {
 448             fprintf(stderr, "Broken pipe\n");
 449             exit(1);
 450         }
 451
 452         if (log) {
 453             len = write(2, &c, 1);
 454         }
 455         json_message_parser_feed(&qmp.parser, &c, 1);
 456     }
 457     json_message_parser_destroy(&qmp.parser);
 458
 459     return qmp.response;
 460 }
 461
 462 QDict *qtest_qmp_receive(QTestState *s)
 463 {
 464     return qmp_fd_receive(s->qmp_fd);
 465 }
 466
 467 /**
 468  * Allow users to send a message without waiting for the reply,
 469  * in the case that they choose to discard all replies up until
 470  * a particular EVENT is received.
 471  */
 472 void qmp_fd_sendv(int fd, const char *fmt, va_list ap)
 473 {
 474     va_list ap_copy;
 475     QObject *qobj;
 476
 477     /* qobject_from_jsonv() silently eats leading 0xff as invalid
 478      * JSON, but we want to test sending them over the wire to force
 479      * resyncs */
 480     if (*fmt == '\377') {
 481         socket_send(fd, fmt, 1);
 482         fmt++;
 483     }
 484
 485     /* Going through qobject ensures we escape strings properly.
 486      * This seemingly unnecessary copy is required in case va_list
 487      * is an array type.
 488      */
 489     va_copy(ap_copy, ap);
 490     qobj = qobject_from_jsonv(fmt, &ap_copy, &error_abort);
 491     va_end(ap_copy);
 492
 493     /* No need to send anything for an empty QObject.  */
 494     if (qobj) {
 495         int log = getenv("QTEST_LOG") != NULL;
 496         QString *qstr = qobject_to_json(qobj);
 497         const char *str;
 498
 499         /*
 500          * BUG: QMP doesn't react to input until it sees a newline, an
 501          * object, or an array.  Work-around: give it a newline.
 502          */
 503         qstring_append_chr(qstr, '\n');
 504         str = qstring_get_str(qstr);
 505
 506         if (log) {
 507             fprintf(stderr, "%s", str);
 508         }
 509         /* Send QMP request */
 510         socket_send(fd, str, qstring_get_length(qstr));
 511
 512         QDECREF(qstr);
 513         qobject_decref(qobj);
 514     }
 515 }
 516
 517 void qtest_async_qmpv(QTestState *s, const char *fmt, va_list ap)
 518 {
 519     qmp_fd_sendv(s->qmp_fd, fmt, ap);
 520 }
 521
 522 QDict *qmp_fdv(int fd, const char *fmt, va_list ap)
 523 {
 524     qmp_fd_sendv(fd, fmt, ap);
 525
 526     return qmp_fd_receive(fd);
 527 }
 528
 529 QDict *qtest_qmpv(QTestState *s, const char *fmt, va_list ap)
 530 {
 531     qtest_async_qmpv(s, fmt, ap);
 532
 533     /* Receive reply */
 534     return qtest_qmp_receive(s);
 535 }
 536
 537 QDict *qmp_fd(int fd, const char *fmt, ...)
 538 {
 539     va_list ap;
 540     QDict *response;
 541
 542     va_start(ap, fmt);
 543     response = qmp_fdv(fd, fmt, ap);
 544     va_end(ap);
 545     return response;
 546 }
 547
 548 void qmp_fd_send(int fd, const char *fmt, ...)
 549 {
 550     va_list ap;
 551
 552     va_start(ap, fmt);
 553     qmp_fd_sendv(fd, fmt, ap);
 554     va_end(ap);
 555 }
 556
 557 QDict *qtest_qmp(QTestState *s, const char *fmt, ...)
 558 {
 559     va_list ap;
 560     QDict *response;
 561
 562     va_start(ap, fmt);
 563     response = qtest_qmpv(s, fmt, ap);
 564     va_end(ap);
 565     return response;
 566 }
 567
 568 void qtest_async_qmp(QTestState *s, const char *fmt, ...)
 569 {
 570     va_list ap;
 571
 572     va_start(ap, fmt);
 573     qtest_async_qmpv(s, fmt, ap);
 574     va_end(ap);
 575 }
 576
 577 void qtest_qmpv_discard_response(QTestState *s, const char *fmt, va_list ap)
 578 {
 579     QDict *response = qtest_qmpv(s, fmt, ap);
 580     QDECREF(response);
 581 }
 582
 583 void qtest_qmp_discard_response(QTestState *s, const char *fmt, ...)
 584 {
 585     va_list ap;
 586     QDict *response;
 587
 588     va_start(ap, fmt);
 589     response = qtest_qmpv(s, fmt, ap);
 590     va_end(ap);
 591     QDECREF(response);
 592 }
 593
 594 QDict *qtest_qmp_eventwait_ref(QTestState *s, const char *event)
 595 {
 596     QDict *response;
 597
 598     for (;;) {
 599         response = qtest_qmp_receive(s);
 600         if ((qdict_haskey(response, "event")) &&
 601             (strcmp(qdict_get_str(response, "event"), event) == 0)) {
 602             return response;
 603         }
 604         QDECREF(response);
 605     }
 606 }
 607
 608 void qtest_qmp_eventwait(QTestState *s, const char *event)
 609 {
 610     QDict *response;
 611
 612     response = qtest_qmp_eventwait_ref(s, event);
 613     QDECREF(response);
 614 }
 615
 616 char *qtest_hmpv(QTestState *s, const char *fmt, va_list ap)
 617 {
 618     char *cmd;
 619     QDict *resp;
 620     char *ret;
 621
 622     cmd = g_strdup_vprintf(fmt, ap);
 623     resp = qtest_qmp(s, "{'execute': 'human-monitor-command',"
 624                      " 'arguments': {'command-line': %s}}",
 625                      cmd);
 626     ret = g_strdup(qdict_get_try_str(resp, "return"));
 627     while (ret == NULL && qdict_get_try_str(resp, "event")) {
 628         /* Ignore asynchronous QMP events */
 629         QDECREF(resp);
 630         resp = qtest_qmp_receive(s);
 631         ret = g_strdup(qdict_get_try_str(resp, "return"));
 632     }
 633     g_assert(ret);
 634     QDECREF(resp);
 635     g_free(cmd);
 636     return ret;
 637 }
 638
 639 char *qtest_hmp(QTestState *s, const char *fmt, ...)
 640 {
 641     va_list ap;
 642     char *ret;
 643
 644     va_start(ap, fmt);
 645     ret = qtest_hmpv(s, fmt, ap);
 646     va_end(ap);
 647     return ret;
 648 }
 649
 650 const char *qtest_get_arch(void)
 651 {
 652     const char *qemu = qtest_qemu_binary();
 653     const char *end = strrchr(qemu, '/');
 654
 655     return end + strlen("/qemu-system-");
 656 }
 657
 658 bool qtest_get_irq(QTestState *s, int num)
 659 {
 660     /* dummy operation in order to make sure irq is up to date */
 661     qtest_inb(s, 0);
 662
 663     return s->irq_level[num];
 664 }
 665
 666 static int64_t qtest_clock_rsp(QTestState *s)
 667 {
 668     gchar **words;
 669     int64_t clock;
 670     words = qtest_rsp(s, 2);
 671     clock = g_ascii_strtoll(words[1], NULL, 0);
 672     g_strfreev(words);
 673     return clock;
 674 }
 675
 676 int64_t qtest_clock_step_next(QTestState *s)
 677 {
 678     qtest_sendf(s, "clock_step\n");
 679     return qtest_clock_rsp(s);
 680 }
 681
 682 int64_t qtest_clock_step(QTestState *s, int64_t step)
 683 {
 684     qtest_sendf(s, "clock_step %"PRIi64"\n", step);
 685     return qtest_clock_rsp(s);
 686 }
 687
 688 int64_t qtest_clock_set(QTestState *s, int64_t val)
 689 {
 690     qtest_sendf(s, "clock_set %"PRIi64"\n", val);
 691     return qtest_clock_rsp(s);
 692 }
 693
 694 void qtest_irq_intercept_out(QTestState *s, const char *qom_path)
 695 {
 696     qtest_sendf(s, "irq_intercept_out %s\n", qom_path);
 697     qtest_rsp(s, 0);
 698 }
 699
 700 void qtest_irq_intercept_in(QTestState *s, const char *qom_path)
 701 {
 702     qtest_sendf(s, "irq_intercept_in %s\n", qom_path);
 703     qtest_rsp(s, 0);
 704 }
 705
 706 static void qtest_out(QTestState *s, const char *cmd, uint16_t addr, uint32_t value)
 707 {
 708     qtest_sendf(s, "%s 0x%x 0x%x\n", cmd, addr, value);
 709     qtest_rsp(s, 0);
 710 }
 711
 712 void qtest_outb(QTestState *s, uint16_t addr, uint8_t value)
 713 {
 714     qtest_out(s, "outb", addr, value);
 715 }
 716
 717 void qtest_outw(QTestState *s, uint16_t addr, uint16_t value)
 718 {
 719     qtest_out(s, "outw", addr, value);
 720 }
 721
 722 void qtest_outl(QTestState *s, uint16_t addr, uint32_t value)
 723 {
 724     qtest_out(s, "outl", addr, value);
 725 }
 726
 727 static uint32_t qtest_in(QTestState *s, const char *cmd, uint16_t addr)
 728 {
 729     gchar **args;
 730     uint32_t value;
 731
 732     qtest_sendf(s, "%s 0x%x\n", cmd, addr);
 733     args = qtest_rsp(s, 2);
 734     value = strtoul(args[1], NULL, 0);
 735     g_strfreev(args);
 736
 737     return value;
 738 }
 739
 740 uint8_t qtest_inb(QTestState *s, uint16_t addr)
 741 {
 742     return qtest_in(s, "inb", addr);
 743 }
 744
 745 uint16_t qtest_inw(QTestState *s, uint16_t addr)
 746 {
 747     return qtest_in(s, "inw", addr);
 748 }
 749
 750 uint32_t qtest_inl(QTestState *s, uint16_t addr)
 751 {
 752     return qtest_in(s, "inl", addr);
 753 }
 754
 755 static void qtest_write(QTestState *s, const char *cmd, uint64_t addr,
 756                         uint64_t value)
 757 {
 758     qtest_sendf(s, "%s 0x%" PRIx64 " 0x%" PRIx64 "\n", cmd, addr, value);
 759     qtest_rsp(s, 0);
 760 }
 761
 762 void qtest_writeb(QTestState *s, uint64_t addr, uint8_t value)
 763 {
 764     qtest_write(s, "writeb", addr, value);
 765 }
 766
 767 void qtest_writew(QTestState *s, uint64_t addr, uint16_t value)
 768 {
 769     qtest_write(s, "writew", addr, value);
 770 }
 771
 772 void qtest_writel(QTestState *s, uint64_t addr, uint32_t value)
 773 {
 774     qtest_write(s, "writel", addr, value);
 775 }
 776
 777 void qtest_writeq(QTestState *s, uint64_t addr, uint64_t value)
 778 {
 779     qtest_write(s, "writeq", addr, value);
 780 }
 781
 782 static uint64_t qtest_read(QTestState *s, const char *cmd, uint64_t addr)
 783 {
 784     gchar **args;
 785     uint64_t value;
 786
 787     qtest_sendf(s, "%s 0x%" PRIx64 "\n", cmd, addr);
 788     args = qtest_rsp(s, 2);
 789     value = strtoull(args[1], NULL, 0);
 790     g_strfreev(args);
 791
 792     return value;
 793 }
 794
 795 uint8_t qtest_readb(QTestState *s, uint64_t addr)
 796 {
 797     return qtest_read(s, "readb", addr);
 798 }
 799
 800 uint16_t qtest_readw(QTestState *s, uint64_t addr)
 801 {
 802     return qtest_read(s, "readw", addr);
 803 }
 804
 805 uint32_t qtest_readl(QTestState *s, uint64_t addr)
 806 {
 807     return qtest_read(s, "readl", addr);
 808 }
 809
 810 uint64_t qtest_readq(QTestState *s, uint64_t addr)
 811 {
 812     return qtest_read(s, "readq", addr);
 813 }
 814
 815 static int hex2nib(char ch)
 816 {
 817     if (ch >= '0' && ch <= '9') {
 818         return ch - '0';
 819     } else if (ch >= 'a' && ch <= 'f') {
 820         return 10 + (ch - 'a');
 821     } else if (ch >= 'A' && ch <= 'F') {
 822         return 10 + (ch - 'a');
 823     } else {
 824         return -1;
 825     }
 826 }
 827
 828 void qtest_memread(QTestState *s, uint64_t addr, void *data, size_t size)
 829 {
 830     uint8_t *ptr = data;
 831     gchar **args;
 832     size_t i;
 833
 834     if (!size) {
 835         return;
 836     }
 837
 838     qtest_sendf(s, "read 0x%" PRIx64 " 0x%zx\n", addr, size);
 839     args = qtest_rsp(s, 2);
 840
 841     for (i = 0; i < size; i++) {
 842         ptr[i] = hex2nib(args[1][2 + (i * 2)]) << 4;
 843         ptr[i] |= hex2nib(args[1][2 + (i * 2) + 1]);
 844     }
 845
 846     g_strfreev(args);
 847 }
 848
 849 uint64_t qtest_rtas_call(QTestState *s, const char *name,
 850                          uint32_t nargs, uint64_t args,
 851                          uint32_t nret, uint64_t ret)
 852 {
 853     qtest_sendf(s, "rtas %s %u 0x%"PRIx64" %u 0x%"PRIx64"\n",
 854                 name, nargs, args, nret, ret);
 855     qtest_rsp(s, 0);
 856     return 0;
 857 }
 858
 859 void qtest_add_func(const char *str, void (*fn)(void))
 860 {
 861     gchar *path = g_strdup_printf("/%s/%s", qtest_get_arch(), str);
 862     g_test_add_func(path, fn);
 863     g_free(path);
 864 }
 865
 866 void qtest_add_data_func_full(const char *str, void *data,
 867                               void (*fn)(const void *),
 868                               GDestroyNotify data_free_func)
 869 {
 870     gchar *path = g_strdup_printf("/%s/%s", qtest_get_arch(), str);
 871     g_test_add_data_func_full(path, data, fn, data_free_func);
 872     g_free(path);
 873 }
 874
 875 void qtest_add_data_func(const char *str, const void *data,
 876                          void (*fn)(const void *))
 877 {
 878     gchar *path = g_strdup_printf("/%s/%s", qtest_get_arch(), str);
 879     g_test_add_data_func(path, data, fn);
 880     g_free(path);
 881 }
 882
 883 void qtest_bufwrite(QTestState *s, uint64_t addr, const void *data, size_t size)
 884 {
 885     gchar *bdata;
 886
 887     bdata = g_base64_encode(data, size);
 888     qtest_sendf(s, "b64write 0x%" PRIx64 " 0x%zx ", addr, size);
 889     socket_send(s->fd, bdata, strlen(bdata));
 890     socket_send(s->fd, "\n", 1);
 891     qtest_rsp(s, 0);
 892     g_free(bdata);
 893 }
 894
 895 void qtest_bufread(QTestState *s, uint64_t addr, void *data, size_t size)
 896 {
 897     gchar **args;
 898     size_t len;
 899
 900     qtest_sendf(s, "b64read 0x%" PRIx64 " 0x%zx\n", addr, size);
 901     args = qtest_rsp(s, 2);
 902
 903     g_base64_decode_inplace(args[1], &len);
 904     if (size != len) {
 905         fprintf(stderr, "bufread: asked for %zu bytes but decoded %zu\n",
 906                 size, len);
 907         len = MIN(len, size);
 908     }
 909
 910     memcpy(data, args[1], len);
 911     g_strfreev(args);
 912 }
 913
 914 void qtest_memwrite(QTestState *s, uint64_t addr, const void *data, size_t size)
 915 {
 916     const uint8_t *ptr = data;
 917     size_t i;
 918     char *enc;
 919
 920     if (!size) {
 921         return;
 922     }
 923
 924     enc = g_malloc(2 * size + 1);
 925
 926     for (i = 0; i < size; i++) {
 927         sprintf(&enc[i * 2], "%02x", ptr[i]);
 928     }
 929
 930     qtest_sendf(s, "write 0x%" PRIx64 " 0x%zx 0x%s\n", addr, size, enc);
 931     qtest_rsp(s, 0);
 932     g_free(enc);
 933 }
 934
 935 void qtest_memset(QTestState *s, uint64_t addr, uint8_t pattern, size_t size)
 936 {
 937     qtest_sendf(s, "memset 0x%" PRIx64 " 0x%zx 0x%02x\n", addr, size, pattern);
 938     qtest_rsp(s, 0);
 939 }
 940
 941 QDict *qmp(const char *fmt, ...)
 942 {
 943     va_list ap;
 944     QDict *response;
 945
 946     va_start(ap, fmt);
 947     response = qtest_qmpv(global_qtest, fmt, ap);
 948     va_end(ap);
 949     return response;
 950 }
 951
 952 void qmp_async(const char *fmt, ...)
 953 {
 954     va_list ap;
 955
 956     va_start(ap, fmt);
 957     qtest_async_qmpv(global_qtest, fmt, ap);
 958     va_end(ap);
 959 }
 960
 961 void qmp_discard_response(const char *fmt, ...)
 962 {
 963     va_list ap;
 964
 965     va_start(ap, fmt);
 966     qtest_qmpv_discard_response(global_qtest, fmt, ap);
 967     va_end(ap);
 968 }
 969 char *hmp(const char *fmt, ...)
 970 {
 971     va_list ap;
 972     char *ret;
 973
 974     va_start(ap, fmt);
 975     ret = qtest_hmpv(global_qtest, fmt, ap);
 976     va_end(ap);
 977     return ret;
 978 }
 979
 980 bool qtest_big_endian(QTestState *s)
 981 {
 982     return s->big_endian;
 983 }
 984
 985 void qtest_cb_for_every_machine(void (*cb)(const char *machine))
 986 {
 987     QDict *response, *minfo;
 988     QList *list;
 989     const QListEntry *p;
 990     QObject *qobj;
 991     QString *qstr;
 992     const char *mname;
 993
 994     qtest_start("-machine none");
 995     response = qmp("{ 'execute': 'query-machines' }");
 996     g_assert(response);
 997     list = qdict_get_qlist(response, "return");
 998     g_assert(list);
 999
1000     for (p = qlist_first(list); p; p = qlist_next(p)) {
1001         minfo = qobject_to_qdict(qlist_entry_obj(p));
1002         g_assert(minfo);
1003         qobj = qdict_get(minfo, "name");
1004         g_assert(qobj);
1005         qstr = qobject_to_qstring(qobj);
1006         g_assert(qstr);
1007         mname = qstring_get_str(qstr);
1008         cb(mname);
1009     }
1010
1011     qtest_end();
1012     QDECREF(response);
1013 }
1014
1015 /*
1016  * Generic hot-plugging test via the device_add QMP command.
1017  */
1018 void qtest_qmp_device_add(const char *driver, const char *id, const char *fmt,
1019                           ...)
1020 {
1021     QDict *response;
1022     char *cmd, *opts = NULL;
1023     va_list va;
1024
1025     if (fmt) {
1026         va_start(va, fmt);
1027         opts = g_strdup_vprintf(fmt, va);
1028         va_end(va);
1029     }
1030
1031     cmd = g_strdup_printf("{'execute': 'device_add',"
1032                           " 'arguments': { 'driver': '%s', 'id': '%s'%s%s }}",
1033                           driver, id, opts ? ", " : "", opts ? opts : "");
1034     g_free(opts);
1035
1036     response = qmp(cmd);
1037     g_free(cmd);
1038     g_assert(response);
1039     g_assert(!qdict_haskey(response, "event")); /* We don't expect any events */
1040     g_assert(!qdict_haskey(response, "error"));
1041     QDECREF(response);
1042 }
1043
1044 /*
1045  * Generic hot-unplugging test via the device_del QMP command.
1046  * Device deletion will get one response and one event. For example:
1047  *
1048  * {'execute': 'device_del','arguments': { 'id': 'scsi-hd'}}
1049  *
1050  * will get this one:
1051  *
1052  * {"timestamp": {"seconds": 1505289667, "microseconds": 569862},
1053  *  "event": "DEVICE_DELETED", "data": {"device": "scsi-hd",
1054  *  "path": "/machine/peripheral/scsi-hd"}}
1055  *
1056  * and this one:
1057  *
1058  * {"return": {}}
1059  *
1060  * But the order of arrival may vary - so we've got to detect both.
1061  */
1062 void qtest_qmp_device_del(const char *id)
1063 {
1064     QDict *response1, *response2, *event = NULL;
1065     char *cmd;
1066
1067     cmd = g_strdup_printf("{'execute': 'device_del',"
1068                           " 'arguments': { 'id': '%s' }}", id);
1069     response1 = qmp(cmd);
1070     g_free(cmd);
1071     g_assert(response1);
1072     g_assert(!qdict_haskey(response1, "error"));
1073
1074     response2 = qmp("");
1075     g_assert(response2);
1076     g_assert(!qdict_haskey(response2, "error"));
1077
1078     if (qdict_haskey(response1, "event")) {
1079         event = response1;
1080     } else if (qdict_haskey(response2, "event")) {
1081         event = response2;
1082     }
1083     g_assert(event);
1084     g_assert_cmpstr(qdict_get_str(event, "event"), ==, "DEVICE_DELETED");
1085
1086     QDECREF(response1);
1087     QDECREF(response2);
1088 }