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/qmp/json-parser.h"
  25 #include "qapi/qmp/json-streamer.h"
  26 #include "qapi/qmp/qjson.h"
  27
  28 #define MAX_IRQ 256
  29 #define SOCKET_TIMEOUT 50
  30
  31 QTestState *global_qtest;
  32
  33 struct QTestState
  34 {
  35     int fd;
  36     int qmp_fd;
  37     bool irq_level[MAX_IRQ];
  38     GString *rx;
  39     pid_t qemu_pid;  /* our child QEMU process */
  40 };
  41
  42 static GHookList abrt_hooks;
  43 static GList *qtest_instances;
  44 static struct sigaction sigact_old;
  45
  46 #define g_assert_no_errno(ret) do { \
  47     g_assert_cmpint(ret, !=, -1); \
  48 } while (0)
  49
  50 static int init_socket(const char *socket_path)
  51 {
  52     struct sockaddr_un addr;
  53     int sock;
  54     int ret;
  55
  56     sock = socket(PF_UNIX, SOCK_STREAM, 0);
  57     g_assert_no_errno(sock);
  58
  59     addr.sun_family = AF_UNIX;
  60     snprintf(addr.sun_path, sizeof(addr.sun_path), "%s", socket_path);
  61     qemu_set_cloexec(sock);
  62
  63     do {
  64         ret = bind(sock, (struct sockaddr *)&addr, sizeof(addr));
  65     } while (ret == -1 && errno == EINTR);
  66     g_assert_no_errno(ret);
  67     ret = listen(sock, 1);
  68     g_assert_no_errno(ret);
  69
  70     return sock;
  71 }
  72
  73 static int socket_accept(int sock)
  74 {
  75     struct sockaddr_un addr;
  76     socklen_t addrlen;
  77     int ret;
  78     struct timeval timeout = { .tv_sec = SOCKET_TIMEOUT,
  79                                .tv_usec = 0 };
  80
  81     setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, (void *)&timeout,
  82                sizeof(timeout));
  83
  84     do {
  85         addrlen = sizeof(addr);
  86         ret = accept(sock, (struct sockaddr *)&addr, &addrlen);
  87     } while (ret == -1 && errno == EINTR);
  88     if (ret == -1) {
  89         fprintf(stderr, "%s failed: %s\n", __func__, strerror(errno));
  90     }
  91     close(sock);
  92
  93     return ret;
  94 }
  95
  96 static void kill_qemu(QTestState *s)
  97 {
  98     if (s->qemu_pid != -1) {
  99         kill(s->qemu_pid, SIGTERM);
 100         waitpid(s->qemu_pid, NULL, 0);
 101     }
 102 }
 103
 104 static void kill_qemu_hook_func(void *s)
 105 {
 106     kill_qemu(s);
 107 }
 108
 109 static void sigabrt_handler(int signo)
 110 {
 111     g_hook_list_invoke(&abrt_hooks, FALSE);
 112 }
 113
 114 static void setup_sigabrt_handler(void)
 115 {
 116     struct sigaction sigact;
 117
 118     /* Catch SIGABRT to clean up on g_assert() failure */
 119     sigact = (struct sigaction){
 120         .sa_handler = sigabrt_handler,
 121         .sa_flags = SA_RESETHAND,
 122     };
 123     sigemptyset(&sigact.sa_mask);
 124     sigaction(SIGABRT, &sigact, &sigact_old);
 125 }
 126
 127 static void cleanup_sigabrt_handler(void)
 128 {
 129     sigaction(SIGABRT, &sigact_old, NULL);
 130 }
 131
 132 void qtest_add_abrt_handler(GHookFunc fn, const void *data)
 133 {
 134     GHook *hook;
 135
 136     /* Only install SIGABRT handler once */
 137     if (!abrt_hooks.is_setup) {
 138         g_hook_list_init(&abrt_hooks, sizeof(GHook));
 139         setup_sigabrt_handler();
 140     }
 141
 142     hook = g_hook_alloc(&abrt_hooks);
 143     hook->func = fn;
 144     hook->data = (void *)data;
 145
 146     g_hook_prepend(&abrt_hooks, hook);
 147 }
 148
 149 QTestState *qtest_init(const char *extra_args)
 150 {
 151     QTestState *s;
 152     int sock, qmpsock, i;
 153     gchar *socket_path;
 154     gchar *qmp_socket_path;
 155     gchar *command;
 156     const char *qemu_binary;
 157
 158     qemu_binary = getenv("QTEST_QEMU_BINARY");
 159     g_assert(qemu_binary != NULL);
 160
 161     s = g_malloc(sizeof(*s));
 162
 163     socket_path = g_strdup_printf("/tmp/qtest-%d.sock", getpid());
 164     qmp_socket_path = g_strdup_printf("/tmp/qtest-%d.qmp", getpid());
 165
 166     sock = init_socket(socket_path);
 167     qmpsock = init_socket(qmp_socket_path);
 168
 169     qtest_add_abrt_handler(kill_qemu_hook_func, s);
 170
 171     s->qemu_pid = fork();
 172     if (s->qemu_pid == 0) {
 173         setenv("QEMU_AUDIO_DRV", "none", true);
 174         command = g_strdup_printf("exec %s "
 175                                   "-qtest unix:%s,nowait "
 176                                   "-qtest-log %s "
 177                                   "-qmp unix:%s,nowait "
 178                                   "-machine accel=qtest "
 179                                   "-display none "
 180                                   "%s", qemu_binary, socket_path,
 181                                   getenv("QTEST_LOG") ? "/dev/fd/2" : "/dev/null",
 182                                   qmp_socket_path,
 183                                   extra_args ?: "");
 184         execlp("/bin/sh", "sh", "-c", command, NULL);
 185         exit(1);
 186     }
 187
 188     s->fd = socket_accept(sock);
 189     if (s->fd >= 0) {
 190         s->qmp_fd = socket_accept(qmpsock);
 191     }
 192     unlink(socket_path);
 193     unlink(qmp_socket_path);
 194     g_free(socket_path);
 195     g_free(qmp_socket_path);
 196
 197     g_assert(s->fd >= 0 && s->qmp_fd >= 0);
 198
 199     s->rx = g_string_new("");
 200     for (i = 0; i < MAX_IRQ; i++) {
 201         s->irq_level[i] = false;
 202     }
 203
 204     /* Read the QMP greeting and then do the handshake */
 205     qtest_qmp_discard_response(s, "");
 206     qtest_qmp_discard_response(s, "{ 'execute': 'qmp_capabilities' }");
 207
 208     if (getenv("QTEST_STOP")) {
 209         kill(s->qemu_pid, SIGSTOP);
 210     }
 211
 212     return s;
 213 }
 214
 215 void qtest_quit(QTestState *s)
 216 {
 217     qtest_instances = g_list_remove(qtest_instances, s);
 218     g_hook_destroy_link(&abrt_hooks, g_hook_find_data(&abrt_hooks, TRUE, s));
 219
 220     /* Uninstall SIGABRT handler on last instance */
 221     if (!qtest_instances) {
 222         cleanup_sigabrt_handler();
 223     }
 224
 225     kill_qemu(s);
 226     close(s->fd);
 227     close(s->qmp_fd);
 228     g_string_free(s->rx, true);
 229     g_free(s);
 230 }
 231
 232 static void socket_send(int fd, const char *buf, size_t size)
 233 {
 234     size_t offset;
 235
 236     offset = 0;
 237     while (offset < size) {
 238         ssize_t len;
 239
 240         len = write(fd, buf + offset, size - offset);
 241         if (len == -1 && errno == EINTR) {
 242             continue;
 243         }
 244
 245         g_assert_no_errno(len);
 246         g_assert_cmpint(len, >, 0);
 247
 248         offset += len;
 249     }
 250 }
 251
 252 static void socket_sendf(int fd, const char *fmt, va_list ap)
 253 {
 254     gchar *str = g_strdup_vprintf(fmt, ap);
 255     size_t size = strlen(str);
 256
 257     socket_send(fd, str, size);
 258     g_free(str);
 259 }
 260
 261 static void GCC_FMT_ATTR(2, 3) qtest_sendf(QTestState *s, const char *fmt, ...)
 262 {
 263     va_list ap;
 264
 265     va_start(ap, fmt);
 266     socket_sendf(s->fd, fmt, ap);
 267     va_end(ap);
 268 }
 269
 270 static GString *qtest_recv_line(QTestState *s)
 271 {
 272     GString *line;
 273     size_t offset;
 274     char *eol;
 275
 276     while ((eol = strchr(s->rx->str, '\n')) == NULL) {
 277         ssize_t len;
 278         char buffer[1024];
 279
 280         len = read(s->fd, buffer, sizeof(buffer));
 281         if (len == -1 && errno == EINTR) {
 282             continue;
 283         }
 284
 285         if (len == -1 || len == 0) {
 286             fprintf(stderr, "Broken pipe\n");
 287             exit(1);
 288         }
 289
 290         g_string_append_len(s->rx, buffer, len);
 291     }
 292
 293     offset = eol - s->rx->str;
 294     line = g_string_new_len(s->rx->str, offset);
 295     g_string_erase(s->rx, 0, offset + 1);
 296
 297     return line;
 298 }
 299
 300 static gchar **qtest_rsp(QTestState *s, int expected_args)
 301 {
 302     GString *line;
 303     gchar **words;
 304     int i;
 305
 306 redo:
 307     line = qtest_recv_line(s);
 308     words = g_strsplit(line->str, " ", 0);
 309     g_string_free(line, TRUE);
 310
 311     if (strcmp(words[0], "IRQ") == 0) {
 312         int irq;
 313
 314         g_assert(words[1] != NULL);
 315         g_assert(words[2] != NULL);
 316
 317         irq = strtoul(words[2], NULL, 0);
 318         g_assert_cmpint(irq, >=, 0);
 319         g_assert_cmpint(irq, <, MAX_IRQ);
 320
 321         if (strcmp(words[1], "raise") == 0) {
 322             s->irq_level[irq] = true;
 323         } else {
 324             s->irq_level[irq] = false;
 325         }
 326
 327         g_strfreev(words);
 328         goto redo;
 329     }
 330
 331     g_assert(words[0] != NULL);
 332     g_assert_cmpstr(words[0], ==, "OK");
 333
 334     if (expected_args) {
 335         for (i = 0; i < expected_args; i++) {
 336             g_assert(words[i] != NULL);
 337         }
 338     } else {
 339         g_strfreev(words);
 340     }
 341
 342     return words;
 343 }
 344
 345 typedef struct {
 346     JSONMessageParser parser;
 347     QDict *response;
 348 } QMPResponseParser;
 349
 350 static void qmp_response(JSONMessageParser *parser, GQueue *tokens)
 351 {
 352     QMPResponseParser *qmp = container_of(parser, QMPResponseParser, parser);
 353     QObject *obj;
 354
 355     obj = json_parser_parse(tokens, NULL);
 356     if (!obj) {
 357         fprintf(stderr, "QMP JSON response parsing failed\n");
 358         exit(1);
 359     }
 360
 361     g_assert(qobject_type(obj) == QTYPE_QDICT);
 362     g_assert(!qmp->response);
 363     qmp->response = (QDict *)obj;
 364 }
 365
 366 QDict *qmp_fd_receive(int fd)
 367 {
 368     QMPResponseParser qmp;
 369     bool log = getenv("QTEST_LOG") != NULL;
 370
 371     qmp.response = NULL;
 372     json_message_parser_init(&qmp.parser, qmp_response);
 373     while (!qmp.response) {
 374         ssize_t len;
 375         char c;
 376
 377         len = read(fd, &c, 1);
 378         if (len == -1 && errno == EINTR) {
 379             continue;
 380         }
 381
 382         if (len == -1 || len == 0) {
 383             fprintf(stderr, "Broken pipe\n");
 384             exit(1);
 385         }
 386
 387         if (log) {
 388             len = write(2, &c, 1);
 389         }
 390         json_message_parser_feed(&qmp.parser, &c, 1);
 391     }
 392     json_message_parser_destroy(&qmp.parser);
 393
 394     return qmp.response;
 395 }
 396
 397 QDict *qtest_qmp_receive(QTestState *s)
 398 {
 399     return qmp_fd_receive(s->qmp_fd);
 400 }
 401
 402 /**
 403  * Allow users to send a message without waiting for the reply,
 404  * in the case that they choose to discard all replies up until
 405  * a particular EVENT is received.
 406  */
 407 void qmp_fd_sendv(int fd, const char *fmt, va_list ap)
 408 {
 409     va_list ap_copy;
 410     QObject *qobj;
 411
 412     /* Going through qobject ensures we escape strings properly.
 413      * This seemingly unnecessary copy is required in case va_list
 414      * is an array type.
 415      */
 416     va_copy(ap_copy, ap);
 417     qobj = qobject_from_jsonv(fmt, &ap_copy);
 418     va_end(ap_copy);
 419
 420     /* No need to send anything for an empty QObject.  */
 421     if (qobj) {
 422         int log = getenv("QTEST_LOG") != NULL;
 423         QString *qstr = qobject_to_json(qobj);
 424         const char *str = qstring_get_str(qstr);
 425         size_t size = qstring_get_length(qstr);
 426
 427         if (log) {
 428             fprintf(stderr, "%s", str);
 429         }
 430         /* Send QMP request */
 431         socket_send(fd, str, size);
 432
 433         QDECREF(qstr);
 434         qobject_decref(qobj);
 435     }
 436 }
 437
 438 void qtest_async_qmpv(QTestState *s, const char *fmt, va_list ap)
 439 {
 440     qmp_fd_sendv(s->qmp_fd, fmt, ap);
 441 }
 442
 443 QDict *qmp_fdv(int fd, const char *fmt, va_list ap)
 444 {
 445     qmp_fd_sendv(fd, fmt, ap);
 446
 447     return qmp_fd_receive(fd);
 448 }
 449
 450 QDict *qtest_qmpv(QTestState *s, const char *fmt, va_list ap)
 451 {
 452     qtest_async_qmpv(s, fmt, ap);
 453
 454     /* Receive reply */
 455     return qtest_qmp_receive(s);
 456 }
 457
 458 QDict *qmp_fd(int fd, const char *fmt, ...)
 459 {
 460     va_list ap;
 461     QDict *response;
 462
 463     va_start(ap, fmt);
 464     response = qmp_fdv(fd, fmt, ap);
 465     va_end(ap);
 466     return response;
 467 }
 468
 469 void qmp_fd_send(int fd, const char *fmt, ...)
 470 {
 471     va_list ap;
 472
 473     va_start(ap, fmt);
 474     qmp_fd_sendv(fd, fmt, ap);
 475     va_end(ap);
 476 }
 477
 478 QDict *qtest_qmp(QTestState *s, const char *fmt, ...)
 479 {
 480     va_list ap;
 481     QDict *response;
 482
 483     va_start(ap, fmt);
 484     response = qtest_qmpv(s, fmt, ap);
 485     va_end(ap);
 486     return response;
 487 }
 488
 489 void qtest_async_qmp(QTestState *s, const char *fmt, ...)
 490 {
 491     va_list ap;
 492
 493     va_start(ap, fmt);
 494     qtest_async_qmpv(s, fmt, ap);
 495     va_end(ap);
 496 }
 497
 498 void qtest_qmpv_discard_response(QTestState *s, const char *fmt, va_list ap)
 499 {
 500     QDict *response = qtest_qmpv(s, fmt, ap);
 501     QDECREF(response);
 502 }
 503
 504 void qtest_qmp_discard_response(QTestState *s, const char *fmt, ...)
 505 {
 506     va_list ap;
 507     QDict *response;
 508
 509     va_start(ap, fmt);
 510     response = qtest_qmpv(s, fmt, ap);
 511     va_end(ap);
 512     QDECREF(response);
 513 }
 514
 515 void qtest_qmp_eventwait(QTestState *s, const char *event)
 516 {
 517     QDict *response;
 518
 519     for (;;) {
 520         response = qtest_qmp_receive(s);
 521         if ((qdict_haskey(response, "event")) &&
 522             (strcmp(qdict_get_str(response, "event"), event) == 0)) {
 523             QDECREF(response);
 524             break;
 525         }
 526         QDECREF(response);
 527     }
 528 }
 529
 530 char *qtest_hmpv(QTestState *s, const char *fmt, va_list ap)
 531 {
 532     char *cmd;
 533     QDict *resp;
 534     char *ret;
 535
 536     cmd = g_strdup_vprintf(fmt, ap);
 537     resp = qtest_qmp(s, "{'execute': 'human-monitor-command',"
 538                      " 'arguments': {'command-line': %s}}",
 539                      cmd);
 540     ret = g_strdup(qdict_get_try_str(resp, "return"));
 541     g_assert(ret);
 542     QDECREF(resp);
 543     g_free(cmd);
 544     return ret;
 545 }
 546
 547 char *qtest_hmp(QTestState *s, const char *fmt, ...)
 548 {
 549     va_list ap;
 550     char *ret;
 551
 552     va_start(ap, fmt);
 553     ret = qtest_hmpv(s, fmt, ap);
 554     va_end(ap);
 555     return ret;
 556 }
 557
 558 const char *qtest_get_arch(void)
 559 {
 560     const char *qemu = getenv("QTEST_QEMU_BINARY");
 561     g_assert(qemu != NULL);
 562     const char *end = strrchr(qemu, '/');
 563
 564     return end + strlen("/qemu-system-");
 565 }
 566
 567 bool qtest_get_irq(QTestState *s, int num)
 568 {
 569     /* dummy operation in order to make sure irq is up to date */
 570     qtest_inb(s, 0);
 571
 572     return s->irq_level[num];
 573 }
 574
 575 static int64_t qtest_clock_rsp(QTestState *s)
 576 {
 577     gchar **words;
 578     int64_t clock;
 579     words = qtest_rsp(s, 2);
 580     clock = g_ascii_strtoll(words[1], NULL, 0);
 581     g_strfreev(words);
 582     return clock;
 583 }
 584
 585 int64_t qtest_clock_step_next(QTestState *s)
 586 {
 587     qtest_sendf(s, "clock_step\n");
 588     return qtest_clock_rsp(s);
 589 }
 590
 591 int64_t qtest_clock_step(QTestState *s, int64_t step)
 592 {
 593     qtest_sendf(s, "clock_step %"PRIi64"\n", step);
 594     return qtest_clock_rsp(s);
 595 }
 596
 597 int64_t qtest_clock_set(QTestState *s, int64_t val)
 598 {
 599     qtest_sendf(s, "clock_set %"PRIi64"\n", val);
 600     return qtest_clock_rsp(s);
 601 }
 602
 603 void qtest_irq_intercept_out(QTestState *s, const char *qom_path)
 604 {
 605     qtest_sendf(s, "irq_intercept_out %s\n", qom_path);
 606     qtest_rsp(s, 0);
 607 }
 608
 609 void qtest_irq_intercept_in(QTestState *s, const char *qom_path)
 610 {
 611     qtest_sendf(s, "irq_intercept_in %s\n", qom_path);
 612     qtest_rsp(s, 0);
 613 }
 614
 615 static void qtest_out(QTestState *s, const char *cmd, uint16_t addr, uint32_t value)
 616 {
 617     qtest_sendf(s, "%s 0x%x 0x%x\n", cmd, addr, value);
 618     qtest_rsp(s, 0);
 619 }
 620
 621 void qtest_outb(QTestState *s, uint16_t addr, uint8_t value)
 622 {
 623     qtest_out(s, "outb", addr, value);
 624 }
 625
 626 void qtest_outw(QTestState *s, uint16_t addr, uint16_t value)
 627 {
 628     qtest_out(s, "outw", addr, value);
 629 }
 630
 631 void qtest_outl(QTestState *s, uint16_t addr, uint32_t value)
 632 {
 633     qtest_out(s, "outl", addr, value);
 634 }
 635
 636 static uint32_t qtest_in(QTestState *s, const char *cmd, uint16_t addr)
 637 {
 638     gchar **args;
 639     uint32_t value;
 640
 641     qtest_sendf(s, "%s 0x%x\n", cmd, addr);
 642     args = qtest_rsp(s, 2);
 643     value = strtoul(args[1], NULL, 0);
 644     g_strfreev(args);
 645
 646     return value;
 647 }
 648
 649 uint8_t qtest_inb(QTestState *s, uint16_t addr)
 650 {
 651     return qtest_in(s, "inb", addr);
 652 }
 653
 654 uint16_t qtest_inw(QTestState *s, uint16_t addr)
 655 {
 656     return qtest_in(s, "inw", addr);
 657 }
 658
 659 uint32_t qtest_inl(QTestState *s, uint16_t addr)
 660 {
 661     return qtest_in(s, "inl", addr);
 662 }
 663
 664 static void qtest_write(QTestState *s, const char *cmd, uint64_t addr,
 665                         uint64_t value)
 666 {
 667     qtest_sendf(s, "%s 0x%" PRIx64 " 0x%" PRIx64 "\n", cmd, addr, value);
 668     qtest_rsp(s, 0);
 669 }
 670
 671 void qtest_writeb(QTestState *s, uint64_t addr, uint8_t value)
 672 {
 673     qtest_write(s, "writeb", addr, value);
 674 }
 675
 676 void qtest_writew(QTestState *s, uint64_t addr, uint16_t value)
 677 {
 678     qtest_write(s, "writew", addr, value);
 679 }
 680
 681 void qtest_writel(QTestState *s, uint64_t addr, uint32_t value)
 682 {
 683     qtest_write(s, "writel", addr, value);
 684 }
 685
 686 void qtest_writeq(QTestState *s, uint64_t addr, uint64_t value)
 687 {
 688     qtest_write(s, "writeq", addr, value);
 689 }
 690
 691 static uint64_t qtest_read(QTestState *s, const char *cmd, uint64_t addr)
 692 {
 693     gchar **args;
 694     uint64_t value;
 695
 696     qtest_sendf(s, "%s 0x%" PRIx64 "\n", cmd, addr);
 697     args = qtest_rsp(s, 2);
 698     value = strtoull(args[1], NULL, 0);
 699     g_strfreev(args);
 700
 701     return value;
 702 }
 703
 704 uint8_t qtest_readb(QTestState *s, uint64_t addr)
 705 {
 706     return qtest_read(s, "readb", addr);
 707 }
 708
 709 uint16_t qtest_readw(QTestState *s, uint64_t addr)
 710 {
 711     return qtest_read(s, "readw", addr);
 712 }
 713
 714 uint32_t qtest_readl(QTestState *s, uint64_t addr)
 715 {
 716     return qtest_read(s, "readl", addr);
 717 }
 718
 719 uint64_t qtest_readq(QTestState *s, uint64_t addr)
 720 {
 721     return qtest_read(s, "readq", addr);
 722 }
 723
 724 static int hex2nib(char ch)
 725 {
 726     if (ch >= '0' && ch <= '9') {
 727         return ch - '0';
 728     } else if (ch >= 'a' && ch <= 'f') {
 729         return 10 + (ch - 'a');
 730     } else if (ch >= 'A' && ch <= 'F') {
 731         return 10 + (ch - 'a');
 732     } else {
 733         return -1;
 734     }
 735 }
 736
 737 void qtest_memread(QTestState *s, uint64_t addr, void *data, size_t size)
 738 {
 739     uint8_t *ptr = data;
 740     gchar **args;
 741     size_t i;
 742
 743     qtest_sendf(s, "read 0x%" PRIx64 " 0x%zx\n", addr, size);
 744     args = qtest_rsp(s, 2);
 745
 746     for (i = 0; i < size; i++) {
 747         ptr[i] = hex2nib(args[1][2 + (i * 2)]) << 4;
 748         ptr[i] |= hex2nib(args[1][2 + (i * 2) + 1]);
 749     }
 750
 751     g_strfreev(args);
 752 }
 753
 754 void qtest_add_func(const char *str, void (*fn)(void))
 755 {
 756     gchar *path = g_strdup_printf("/%s/%s", qtest_get_arch(), str);
 757     g_test_add_func(path, fn);
 758     g_free(path);
 759 }
 760
 761 void qtest_add_data_func(const char *str, const void *data,
 762                          void (*fn)(const void *))
 763 {
 764     gchar *path = g_strdup_printf("/%s/%s", qtest_get_arch(), str);
 765     g_test_add_data_func(path, data, fn);
 766     g_free(path);
 767 }
 768
 769 void qtest_bufwrite(QTestState *s, uint64_t addr, const void *data, size_t size)
 770 {
 771     gchar *bdata;
 772
 773     bdata = g_base64_encode(data, size);
 774     qtest_sendf(s, "b64write 0x%" PRIx64 " 0x%zx ", addr, size);
 775     socket_send(s->fd, bdata, strlen(bdata));
 776     socket_send(s->fd, "\n", 1);
 777     qtest_rsp(s, 0);
 778     g_free(bdata);
 779 }
 780
 781 void qtest_bufread(QTestState *s, uint64_t addr, void *data, size_t size)
 782 {
 783     gchar **args;
 784     size_t len;
 785
 786     qtest_sendf(s, "b64read 0x%" PRIx64 " 0x%zx\n", addr, size);
 787     args = qtest_rsp(s, 2);
 788
 789     g_base64_decode_inplace(args[1], &len);
 790     if (size != len) {
 791         fprintf(stderr, "bufread: asked for %zu bytes but decoded %zu\n",
 792                 size, len);
 793         len = MIN(len, size);
 794     }
 795
 796     memcpy(data, args[1], len);
 797     g_strfreev(args);
 798 }
 799
 800 void qtest_memwrite(QTestState *s, uint64_t addr, const void *data, size_t size)
 801 {
 802     const uint8_t *ptr = data;
 803     size_t i;
 804     char *enc = g_malloc(2 * size + 1);
 805
 806     for (i = 0; i < size; i++) {
 807         sprintf(&enc[i * 2], "%02x", ptr[i]);
 808     }
 809
 810     qtest_sendf(s, "write 0x%" PRIx64 " 0x%zx 0x%s\n", addr, size, enc);
 811     qtest_rsp(s, 0);
 812     g_free(enc);
 813 }
 814
 815 void qtest_memset(QTestState *s, uint64_t addr, uint8_t pattern, size_t size)
 816 {
 817     qtest_sendf(s, "memset 0x%" PRIx64 " 0x%zx 0x%02x\n", addr, size, pattern);
 818     qtest_rsp(s, 0);
 819 }
 820
 821 QDict *qmp(const char *fmt, ...)
 822 {
 823     va_list ap;
 824     QDict *response;
 825
 826     va_start(ap, fmt);
 827     response = qtest_qmpv(global_qtest, fmt, ap);
 828     va_end(ap);
 829     return response;
 830 }
 831
 832 void qmp_async(const char *fmt, ...)
 833 {
 834     va_list ap;
 835
 836     va_start(ap, fmt);
 837     qtest_async_qmpv(global_qtest, fmt, ap);
 838     va_end(ap);
 839 }
 840
 841 void qmp_discard_response(const char *fmt, ...)
 842 {
 843     va_list ap;
 844
 845     va_start(ap, fmt);
 846     qtest_qmpv_discard_response(global_qtest, fmt, ap);
 847     va_end(ap);
 848 }
 849 char *hmp(const char *fmt, ...)
 850 {
 851     va_list ap;
 852     char *ret;
 853
 854     va_start(ap, fmt);
 855     ret = qtest_hmpv(global_qtest, fmt, ap);
 856     va_end(ap);
 857     return ret;
 858 }
 859
 860 bool qtest_big_endian(void)
 861 {
 862     const char *arch = qtest_get_arch();
 863     int i;
 864
 865     static const struct {
 866         const char *arch;
 867         bool big_endian;
 868     } endianness[] = {
 869         { "aarch64", false },
 870         { "alpha", false },
 871         { "arm", false },
 872         { "cris", false },
 873         { "i386", false },
 874         { "lm32", true },
 875         { "m68k", true },
 876         { "microblaze", true },
 877         { "microblazeel", false },
 878         { "mips", true },
 879         { "mips64", true },
 880         { "mips64el", false },
 881         { "mipsel", false },
 882         { "moxie", true },
 883         { "or32", true },
 884         { "ppc", true },
 885         { "ppc64", true },
 886         { "ppcemb", true },
 887         { "s390x", true },
 888         { "sh4", false },
 889         { "sh4eb", true },
 890         { "sparc", true },
 891         { "sparc64", true },
 892         { "unicore32", false },
 893         { "x86_64", false },
 894         { "xtensa", false },
 895         { "xtensaeb", true },
 896         {},
 897     };
 898
 899     for (i = 0; endianness[i].arch; i++) {
 900         if (strcmp(endianness[i].arch, arch) == 0) {
 901             return endianness[i].big_endian;
 902         }
 903     }
 904
 905     return false;
 906 }