tests/libqtest.c

   1 /*
   2  * QTest
   3  *
   4  * Copyright IBM, Corp. 2012
   5  * Copyright Red Hat, Inc. 2012
   6  * Copyright SUSE LINUX Products GmbH 2013
   7  *
   8  * Authors:
   9  *  Anthony Liguori   <aliguori@us.ibm.com>
  10  *  Paolo Bonzini     <pbonzini@redhat.com>
  11  *  Andreas Färber    <afaerber@suse.de>
  12  *
  13  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  14  * See the COPYING file in the top-level directory.
  15  *
  16  */
  17 #include "libqtest.h"
  18
  19 #include <glib.h>
  20 #include <sys/types.h>
  21 #include <sys/socket.h>
  22 #include <sys/wait.h>
  23 #include <sys/un.h>
  24 #include <inttypes.h>
  25 #include <errno.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <unistd.h>
  29 #include <string.h>
  30
  31 #include "qemu/compiler.h"
  32 #include "qemu/osdep.h"
  33 #include "qapi/qmp/json-parser.h"
  34 #include "qapi/qmp/json-streamer.h"
  35 #include "qapi/qmp/qjson.h"
  36
  37 #define MAX_IRQ 256
  38 #define SOCKET_TIMEOUT 5
  39
  40 QTestState *global_qtest;
  41
  42 struct QTestState
  43 {
  44     int fd;
  45     int qmp_fd;
  46     bool irq_level[MAX_IRQ];
  47     GString *rx;
  48     pid_t qemu_pid;  /* our child QEMU process */
  49 };
  50
  51 static GHookList abrt_hooks;
  52 static GList *qtest_instances;
  53 static struct sigaction sigact_old;
  54
  55 #define g_assert_no_errno(ret) do { \
  56     g_assert_cmpint(ret, !=, -1); \
  57 } while (0)
  58
  59 static int init_socket(const char *socket_path)
  60 {
  61     struct sockaddr_un addr;
  62     int sock;
  63     int ret;
  64
  65     sock = socket(PF_UNIX, SOCK_STREAM, 0);
  66     g_assert_no_errno(sock);
  67
  68     addr.sun_family = AF_UNIX;
  69     snprintf(addr.sun_path, sizeof(addr.sun_path), "%s", socket_path);
  70     qemu_set_cloexec(sock);
  71
  72     do {
  73         ret = bind(sock, (struct sockaddr *)&addr, sizeof(addr));
  74     } while (ret == -1 && errno == EINTR);
  75     g_assert_no_errno(ret);
  76     ret = listen(sock, 1);
  77     g_assert_no_errno(ret);
  78
  79     return sock;
  80 }
  81
  82 static int socket_accept(int sock)
  83 {
  84     struct sockaddr_un addr;
  85     socklen_t addrlen;
  86     int ret;
  87     struct timeval timeout = { .tv_sec = SOCKET_TIMEOUT,
  88                                .tv_usec = 0 };
  89
  90     setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, (void *)&timeout,
  91                sizeof(timeout));
  92
  93     do {
  94         addrlen = sizeof(addr);
  95         ret = accept(sock, (struct sockaddr *)&addr, &addrlen);
  96     } while (ret == -1 && errno == EINTR);
  97     if (ret == -1) {
  98         fprintf(stderr, "%s failed: %s\n", __func__, strerror(errno));
  99     }
 100     close(sock);
 101
 102     return ret;
 103 }
 104
 105 static void kill_qemu(QTestState *s)
 106 {
 107     if (s->qemu_pid != -1) {
 108         kill(s->qemu_pid, SIGTERM);
 109         waitpid(s->qemu_pid, NULL, 0);
 110     }
 111 }
 112
 113 static void sigabrt_handler(int signo)
 114 {
 115     g_hook_list_invoke(&abrt_hooks, FALSE);
 116 }
 117
 118 static void setup_sigabrt_handler(void)
 119 {
 120     struct sigaction sigact;
 121
 122     /* Catch SIGABRT to clean up on g_assert() failure */
 123     sigact = (struct sigaction){
 124         .sa_handler = sigabrt_handler,
 125         .sa_flags = SA_RESETHAND,
 126     };
 127     sigemptyset(&sigact.sa_mask);
 128     sigaction(SIGABRT, &sigact, &sigact_old);
 129 }
 130
 131 static void cleanup_sigabrt_handler(void)
 132 {
 133     sigaction(SIGABRT, &sigact_old, NULL);
 134 }
 135
 136 void qtest_add_abrt_handler(void (*fn), const void *data)
 137 {
 138     GHook *hook;
 139
 140     /* Only install SIGABRT handler once */
 141     if (!abrt_hooks.is_setup) {
 142         g_hook_list_init(&abrt_hooks, sizeof(GHook));
 143         setup_sigabrt_handler();
 144     }
 145
 146     hook = g_hook_alloc(&abrt_hooks);
 147     hook->func = fn;
 148     hook->data = (void *)data;
 149
 150     g_hook_prepend(&abrt_hooks, hook);
 151 }
 152
 153 QTestState *qtest_init(const char *extra_args)
 154 {
 155     QTestState *s;
 156     int sock, qmpsock, i;
 157     gchar *socket_path;
 158     gchar *qmp_socket_path;
 159     gchar *command;
 160     const char *qemu_binary;
 161
 162     qemu_binary = getenv("QTEST_QEMU_BINARY");
 163     g_assert(qemu_binary != NULL);
 164
 165     s = g_malloc(sizeof(*s));
 166
 167     socket_path = g_strdup_printf("/tmp/qtest-%d.sock", getpid());
 168     qmp_socket_path = g_strdup_printf("/tmp/qtest-%d.qmp", getpid());
 169
 170     sock = init_socket(socket_path);
 171     qmpsock = init_socket(qmp_socket_path);
 172
 173     qtest_add_abrt_handler(kill_qemu, s);
 174
 175     s->qemu_pid = fork();
 176     if (s->qemu_pid == 0) {
 177         setenv("QEMU_AUDIO_DRV", "none", true);
 178         command = g_strdup_printf("exec %s "
 179                                   "-qtest unix:%s,nowait "
 180                                   "-qtest-log %s "
 181                                   "-qmp unix:%s,nowait "
 182                                   "-machine accel=qtest "
 183                                   "-display none "
 184                                   "%s", qemu_binary, socket_path,
 185                                   getenv("QTEST_LOG") ? "/dev/fd/2" : "/dev/null",
 186                                   qmp_socket_path,
 187                                   extra_args ?: "");
 188         execlp("/bin/sh", "sh", "-c", command, NULL);
 189         exit(1);
 190     }
 191
 192     s->fd = socket_accept(sock);
 193     if (s->fd >= 0) {
 194         s->qmp_fd = socket_accept(qmpsock);
 195     }
 196     unlink(socket_path);
 197     unlink(qmp_socket_path);
 198     g_free(socket_path);
 199     g_free(qmp_socket_path);
 200
 201     g_assert(s->fd >= 0 && s->qmp_fd >= 0);
 202
 203     s->rx = g_string_new("");
 204     for (i = 0; i < MAX_IRQ; i++) {
 205         s->irq_level[i] = false;
 206     }
 207
 208     /* Read the QMP greeting and then do the handshake */
 209     qtest_qmp_discard_response(s, "");
 210     qtest_qmp_discard_response(s, "{ 'execute': 'qmp_capabilities' }");
 211
 212     if (getenv("QTEST_STOP")) {
 213         kill(s->qemu_pid, SIGSTOP);
 214     }
 215
 216     return s;
 217 }
 218
 219 void qtest_quit(QTestState *s)
 220 {
 221     qtest_instances = g_list_remove(qtest_instances, s);
 222     g_hook_destroy_link(&abrt_hooks, g_hook_find_data(&abrt_hooks, TRUE, s));
 223
 224     /* Uninstall SIGABRT handler on last instance */
 225     if (!qtest_instances) {
 226         cleanup_sigabrt_handler();
 227     }
 228
 229     kill_qemu(s);
 230     close(s->fd);
 231     close(s->qmp_fd);
 232     g_string_free(s->rx, true);
 233     g_free(s);
 234 }
 235
 236 static void socket_send(int fd, const char *buf, size_t size)
 237 {
 238     size_t offset;
 239
 240     offset = 0;
 241     while (offset < size) {
 242         ssize_t len;
 243
 244         len = write(fd, buf + offset, size - offset);
 245         if (len == -1 && errno == EINTR) {
 246             continue;
 247         }
 248
 249         g_assert_no_errno(len);
 250         g_assert_cmpint(len, >, 0);
 251
 252         offset += len;
 253     }
 254 }
 255
 256 static void socket_sendf(int fd, const char *fmt, va_list ap)
 257 {
 258     gchar *str = g_strdup_vprintf(fmt, ap);
 259     size_t size = strlen(str);
 260
 261     socket_send(fd, str, size);
 262     g_free(str);
 263 }
 264
 265 static void GCC_FMT_ATTR(2, 3) qtest_sendf(QTestState *s, const char *fmt, ...)
 266 {
 267     va_list ap;
 268
 269     va_start(ap, fmt);
 270     socket_sendf(s->fd, fmt, ap);
 271     va_end(ap);
 272 }
 273
 274 static GString *qtest_recv_line(QTestState *s)
 275 {
 276     GString *line;
 277     size_t offset;
 278     char *eol;
 279
 280     while ((eol = strchr(s->rx->str, '\n')) == NULL) {
 281         ssize_t len;
 282         char buffer[1024];
 283
 284         len = read(s->fd, buffer, sizeof(buffer));
 285         if (len == -1 && errno == EINTR) {
 286             continue;
 287         }
 288
 289         if (len == -1 || len == 0) {
 290             fprintf(stderr, "Broken pipe\n");
 291             exit(1);
 292         }
 293
 294         g_string_append_len(s->rx, buffer, len);
 295     }
 296
 297     offset = eol - s->rx->str;
 298     line = g_string_new_len(s->rx->str, offset);
 299     g_string_erase(s->rx, 0, offset + 1);
 300
 301     return line;
 302 }
 303
 304 static gchar **qtest_rsp(QTestState *s, int expected_args)
 305 {
 306     GString *line;
 307     gchar **words;
 308     int i;
 309
 310 redo:
 311     line = qtest_recv_line(s);
 312     words = g_strsplit(line->str, " ", 0);
 313     g_string_free(line, TRUE);
 314
 315     if (strcmp(words[0], "IRQ") == 0) {
 316         int irq;
 317
 318         g_assert(words[1] != NULL);
 319         g_assert(words[2] != NULL);
 320
 321         irq = strtoul(words[2], NULL, 0);
 322         g_assert_cmpint(irq, >=, 0);
 323         g_assert_cmpint(irq, <, MAX_IRQ);
 324
 325         if (strcmp(words[1], "raise") == 0) {
 326             s->irq_level[irq] = true;
 327         } else {
 328             s->irq_level[irq] = false;
 329         }
 330
 331         g_strfreev(words);
 332         goto redo;
 333     }
 334
 335     g_assert(words[0] != NULL);
 336     g_assert_cmpstr(words[0], ==, "OK");
 337
 338     if (expected_args) {
 339         for (i = 0; i < expected_args; i++) {
 340             g_assert(words[i] != NULL);
 341         }
 342     } else {
 343         g_strfreev(words);
 344     }
 345
 346     return words;
 347 }
 348
 349 typedef struct {
 350     JSONMessageParser parser;
 351     QDict *response;
 352 } QMPResponseParser;
 353
 354 static void qmp_response(JSONMessageParser *parser, QList *tokens)
 355 {
 356     QMPResponseParser *qmp = container_of(parser, QMPResponseParser, parser);
 357     QObject *obj;
 358
 359     obj = json_parser_parse(tokens, NULL);
 360     if (!obj) {
 361         fprintf(stderr, "QMP JSON response parsing failed\n");
 362         exit(1);
 363     }
 364
 365     g_assert(qobject_type(obj) == QTYPE_QDICT);
 366     g_assert(!qmp->response);
 367     qmp->response = (QDict *)obj;
 368 }
 369
 370 QDict *qmp_fd_receive(int fd)
 371 {
 372     QMPResponseParser qmp;
 373     bool log = getenv("QTEST_LOG") != NULL;
 374
 375     qmp.response = NULL;
 376     json_message_parser_init(&qmp.parser, qmp_response);
 377     while (!qmp.response) {
 378         ssize_t len;
 379         char c;
 380
 381         len = read(fd, &c, 1);
 382         if (len == -1 && errno == EINTR) {
 383             continue;
 384         }
 385
 386         if (len == -1 || len == 0) {
 387             fprintf(stderr, "Broken pipe\n");
 388             exit(1);
 389         }
 390
 391         if (log) {
 392             len = write(2, &c, 1);
 393         }
 394         json_message_parser_feed(&qmp.parser, &c, 1);
 395     }
 396     json_message_parser_destroy(&qmp.parser);
 397
 398     return qmp.response;
 399 }
 400
 401 QDict *qtest_qmp_receive(QTestState *s)
 402 {
 403     return qmp_fd_receive(s->qmp_fd);
 404 }
 405
 406 /**
 407  * Allow users to send a message without waiting for the reply,
 408  * in the case that they choose to discard all replies up until
 409  * a particular EVENT is received.
 410  */
 411 void qmp_fd_sendv(int fd, const char *fmt, va_list ap)
 412 {
 413     va_list ap_copy;
 414     QObject *qobj;
 415
 416     /* Going through qobject ensures we escape strings properly.
 417      * This seemingly unnecessary copy is required in case va_list
 418      * is an array type.
 419      */
 420     va_copy(ap_copy, ap);
 421     qobj = qobject_from_jsonv(fmt, &ap_copy);
 422     va_end(ap_copy);
 423
 424     /* No need to send anything for an empty QObject.  */
 425     if (qobj) {
 426         int log = getenv("QTEST_LOG") != NULL;
 427         QString *qstr = qobject_to_json(qobj);
 428         const char *str = qstring_get_str(qstr);
 429         size_t size = qstring_get_length(qstr);
 430
 431         if (log) {
 432             fprintf(stderr, "%s", str);
 433         }
 434         /* Send QMP request */
 435         socket_send(fd, str, size);
 436
 437         QDECREF(qstr);
 438         qobject_decref(qobj);
 439     }
 440 }
 441
 442 void qtest_async_qmpv(QTestState *s, const char *fmt, va_list ap)
 443 {
 444     qmp_fd_sendv(s->qmp_fd, fmt, ap);
 445 }
 446
 447 QDict *qmp_fdv(int fd, const char *fmt, va_list ap)
 448 {
 449     qmp_fd_sendv(fd, fmt, ap);
 450
 451     return qmp_fd_receive(fd);
 452 }
 453
 454 QDict *qtest_qmpv(QTestState *s, const char *fmt, va_list ap)
 455 {
 456     qtest_async_qmpv(s, fmt, ap);
 457
 458     /* Receive reply */
 459     return qtest_qmp_receive(s);
 460 }
 461
 462 QDict *qmp_fd(int fd, const char *fmt, ...)
 463 {
 464     va_list ap;
 465     QDict *response;
 466
 467     va_start(ap, fmt);
 468     response = qmp_fdv(fd, fmt, ap);
 469     va_end(ap);
 470     return response;
 471 }
 472
 473 void qmp_fd_send(int fd, const char *fmt, ...)
 474 {
 475     va_list ap;
 476
 477     va_start(ap, fmt);
 478     qmp_fd_sendv(fd, fmt, ap);
 479     va_end(ap);
 480 }
 481
 482 QDict *qtest_qmp(QTestState *s, const char *fmt, ...)
 483 {
 484     va_list ap;
 485     QDict *response;
 486
 487     va_start(ap, fmt);
 488     response = qtest_qmpv(s, fmt, ap);
 489     va_end(ap);
 490     return response;
 491 }
 492
 493 void qtest_async_qmp(QTestState *s, const char *fmt, ...)
 494 {
 495     va_list ap;
 496
 497     va_start(ap, fmt);
 498     qtest_async_qmpv(s, fmt, ap);
 499     va_end(ap);
 500 }
 501
 502 void qtest_qmpv_discard_response(QTestState *s, const char *fmt, va_list ap)
 503 {
 504     QDict *response = qtest_qmpv(s, fmt, ap);
 505     QDECREF(response);
 506 }
 507
 508 void qtest_qmp_discard_response(QTestState *s, const char *fmt, ...)
 509 {
 510     va_list ap;
 511     QDict *response;
 512
 513     va_start(ap, fmt);
 514     response = qtest_qmpv(s, fmt, ap);
 515     va_end(ap);
 516     QDECREF(response);
 517 }
 518
 519 void qtest_qmp_eventwait(QTestState *s, const char *event)
 520 {
 521     QDict *response;
 522
 523     for (;;) {
 524         response = qtest_qmp_receive(s);
 525         if ((qdict_haskey(response, "event")) &&
 526             (strcmp(qdict_get_str(response, "event"), event) == 0)) {
 527             QDECREF(response);
 528             break;
 529         }
 530         QDECREF(response);
 531     }
 532 }
 533
 534 char *qtest_hmpv(QTestState *s, const char *fmt, va_list ap)
 535 {
 536     char *cmd;
 537     QDict *resp;
 538     char *ret;
 539
 540     cmd = g_strdup_vprintf(fmt, ap);
 541     resp = qtest_qmp(s, "{'execute': 'human-monitor-command',"
 542                      " 'arguments': {'command-line': %s}}",
 543                      cmd);
 544     ret = g_strdup(qdict_get_try_str(resp, "return"));
 545     g_assert(ret);
 546     QDECREF(resp);
 547     g_free(cmd);
 548     return ret;
 549 }
 550
 551 char *qtest_hmp(QTestState *s, const char *fmt, ...)
 552 {
 553     va_list ap;
 554     char *ret;
 555
 556     va_start(ap, fmt);
 557     ret = qtest_hmpv(s, fmt, ap);
 558     va_end(ap);
 559     return ret;
 560 }
 561
 562 const char *qtest_get_arch(void)
 563 {
 564     const char *qemu = getenv("QTEST_QEMU_BINARY");
 565     g_assert(qemu != NULL);
 566     const char *end = strrchr(qemu, '/');
 567
 568     return end + strlen("/qemu-system-");
 569 }
 570
 571 bool qtest_get_irq(QTestState *s, int num)
 572 {
 573     /* dummy operation in order to make sure irq is up to date */
 574     qtest_inb(s, 0);
 575
 576     return s->irq_level[num];
 577 }
 578
 579 static int64_t qtest_clock_rsp(QTestState *s)
 580 {
 581     gchar **words;
 582     int64_t clock;
 583     words = qtest_rsp(s, 2);
 584     clock = g_ascii_strtoll(words[1], NULL, 0);
 585     g_strfreev(words);
 586     return clock;
 587 }
 588
 589 int64_t qtest_clock_step_next(QTestState *s)
 590 {
 591     qtest_sendf(s, "clock_step\n");
 592     return qtest_clock_rsp(s);
 593 }
 594
 595 int64_t qtest_clock_step(QTestState *s, int64_t step)
 596 {
 597     qtest_sendf(s, "clock_step %"PRIi64"\n", step);
 598     return qtest_clock_rsp(s);
 599 }
 600
 601 int64_t qtest_clock_set(QTestState *s, int64_t val)
 602 {
 603     qtest_sendf(s, "clock_set %"PRIi64"\n", val);
 604     return qtest_clock_rsp(s);
 605 }
 606
 607 void qtest_irq_intercept_out(QTestState *s, const char *qom_path)
 608 {
 609     qtest_sendf(s, "irq_intercept_out %s\n", qom_path);
 610     qtest_rsp(s, 0);
 611 }
 612
 613 void qtest_irq_intercept_in(QTestState *s, const char *qom_path)
 614 {
 615     qtest_sendf(s, "irq_intercept_in %s\n", qom_path);
 616     qtest_rsp(s, 0);
 617 }
 618
 619 static void qtest_out(QTestState *s, const char *cmd, uint16_t addr, uint32_t value)
 620 {
 621     qtest_sendf(s, "%s 0x%x 0x%x\n", cmd, addr, value);
 622     qtest_rsp(s, 0);
 623 }
 624
 625 void qtest_outb(QTestState *s, uint16_t addr, uint8_t value)
 626 {
 627     qtest_out(s, "outb", addr, value);
 628 }
 629
 630 void qtest_outw(QTestState *s, uint16_t addr, uint16_t value)
 631 {
 632     qtest_out(s, "outw", addr, value);
 633 }
 634
 635 void qtest_outl(QTestState *s, uint16_t addr, uint32_t value)
 636 {
 637     qtest_out(s, "outl", addr, value);
 638 }
 639
 640 static uint32_t qtest_in(QTestState *s, const char *cmd, uint16_t addr)
 641 {
 642     gchar **args;
 643     uint32_t value;
 644
 645     qtest_sendf(s, "%s 0x%x\n", cmd, addr);
 646     args = qtest_rsp(s, 2);
 647     value = strtoul(args[1], NULL, 0);
 648     g_strfreev(args);
 649
 650     return value;
 651 }
 652
 653 uint8_t qtest_inb(QTestState *s, uint16_t addr)
 654 {
 655     return qtest_in(s, "inb", addr);
 656 }
 657
 658 uint16_t qtest_inw(QTestState *s, uint16_t addr)
 659 {
 660     return qtest_in(s, "inw", addr);
 661 }
 662
 663 uint32_t qtest_inl(QTestState *s, uint16_t addr)
 664 {
 665     return qtest_in(s, "inl", addr);
 666 }
 667
 668 static void qtest_write(QTestState *s, const char *cmd, uint64_t addr,
 669                         uint64_t value)
 670 {
 671     qtest_sendf(s, "%s 0x%" PRIx64 " 0x%" PRIx64 "\n", cmd, addr, value);
 672     qtest_rsp(s, 0);
 673 }
 674
 675 void qtest_writeb(QTestState *s, uint64_t addr, uint8_t value)
 676 {
 677     qtest_write(s, "writeb", addr, value);
 678 }
 679
 680 void qtest_writew(QTestState *s, uint64_t addr, uint16_t value)
 681 {
 682     qtest_write(s, "writew", addr, value);
 683 }
 684
 685 void qtest_writel(QTestState *s, uint64_t addr, uint32_t value)
 686 {
 687     qtest_write(s, "writel", addr, value);
 688 }
 689
 690 void qtest_writeq(QTestState *s, uint64_t addr, uint64_t value)
 691 {
 692     qtest_write(s, "writeq", addr, value);
 693 }
 694
 695 static uint64_t qtest_read(QTestState *s, const char *cmd, uint64_t addr)
 696 {
 697     gchar **args;
 698     uint64_t value;
 699
 700     qtest_sendf(s, "%s 0x%" PRIx64 "\n", cmd, addr);
 701     args = qtest_rsp(s, 2);
 702     value = strtoull(args[1], NULL, 0);
 703     g_strfreev(args);
 704
 705     return value;
 706 }
 707
 708 uint8_t qtest_readb(QTestState *s, uint64_t addr)
 709 {
 710     return qtest_read(s, "readb", addr);
 711 }
 712
 713 uint16_t qtest_readw(QTestState *s, uint64_t addr)
 714 {
 715     return qtest_read(s, "readw", addr);
 716 }
 717
 718 uint32_t qtest_readl(QTestState *s, uint64_t addr)
 719 {
 720     return qtest_read(s, "readl", addr);
 721 }
 722
 723 uint64_t qtest_readq(QTestState *s, uint64_t addr)
 724 {
 725     return qtest_read(s, "readq", addr);
 726 }
 727
 728 static int hex2nib(char ch)
 729 {
 730     if (ch >= '0' && ch <= '9') {
 731         return ch - '0';
 732     } else if (ch >= 'a' && ch <= 'f') {
 733         return 10 + (ch - 'a');
 734     } else if (ch >= 'A' && ch <= 'F') {
 735         return 10 + (ch - 'a');
 736     } else {
 737         return -1;
 738     }
 739 }
 740
 741 void qtest_memread(QTestState *s, uint64_t addr, void *data, size_t size)
 742 {
 743     uint8_t *ptr = data;
 744     gchar **args;
 745     size_t i;
 746
 747     qtest_sendf(s, "read 0x%" PRIx64 " 0x%zx\n", addr, size);
 748     args = qtest_rsp(s, 2);
 749
 750     for (i = 0; i < size; i++) {
 751         ptr[i] = hex2nib(args[1][2 + (i * 2)]) << 4;
 752         ptr[i] |= hex2nib(args[1][2 + (i * 2) + 1]);
 753     }
 754
 755     g_strfreev(args);
 756 }
 757
 758 void qtest_add_func(const char *str, void (*fn))
 759 {
 760     gchar *path = g_strdup_printf("/%s/%s", qtest_get_arch(), str);
 761     g_test_add_func(path, fn);
 762     g_free(path);
 763 }
 764
 765 void qtest_add_data_func(const char *str, const void *data, void (*fn))
 766 {
 767     gchar *path = g_strdup_printf("/%s/%s", qtest_get_arch(), str);
 768     g_test_add_data_func(path, data, fn);
 769     g_free(path);
 770 }
 771
 772 void qtest_bufwrite(QTestState *s, uint64_t addr, const void *data, size_t size)
 773 {
 774     gchar *bdata;
 775
 776     bdata = g_base64_encode(data, size);
 777     qtest_sendf(s, "b64write 0x%" PRIx64 " 0x%zx ", addr, size);
 778     socket_send(s->fd, bdata, strlen(bdata));
 779     socket_send(s->fd, "\n", 1);
 780     qtest_rsp(s, 0);
 781     g_free(bdata);
 782 }
 783
 784 void qtest_bufread(QTestState *s, uint64_t addr, void *data, size_t size)
 785 {
 786     gchar **args;
 787     size_t len;
 788
 789     qtest_sendf(s, "b64read 0x%" PRIx64 " 0x%zx\n", addr, size);
 790     args = qtest_rsp(s, 2);
 791
 792     g_base64_decode_inplace(args[1], &len);
 793     if (size != len) {
 794         fprintf(stderr, "bufread: asked for %zu bytes but decoded %zu\n",
 795                 size, len);
 796         len = MIN(len, size);
 797     }
 798
 799     memcpy(data, args[1], len);
 800     g_strfreev(args);
 801 }
 802
 803 void qtest_memwrite(QTestState *s, uint64_t addr, const void *data, size_t size)
 804 {
 805     const uint8_t *ptr = data;
 806     size_t i;
 807     char *enc = g_malloc(2 * size + 1);
 808
 809     for (i = 0; i < size; i++) {
 810         sprintf(&enc[i * 2], "%02x", ptr[i]);
 811     }
 812
 813     qtest_sendf(s, "write 0x%" PRIx64 " 0x%zx 0x%s\n", addr, size, enc);
 814     qtest_rsp(s, 0);
 815     g_free(enc);
 816 }
 817
 818 void qtest_memset(QTestState *s, uint64_t addr, uint8_t pattern, size_t size)
 819 {
 820     qtest_sendf(s, "memset 0x%" PRIx64 " 0x%zx 0x%02x\n", addr, size, pattern);
 821     qtest_rsp(s, 0);
 822 }
 823
 824 QDict *qmp(const char *fmt, ...)
 825 {
 826     va_list ap;
 827     QDict *response;
 828
 829     va_start(ap, fmt);
 830     response = qtest_qmpv(global_qtest, fmt, ap);
 831     va_end(ap);
 832     return response;
 833 }
 834
 835 void qmp_async(const char *fmt, ...)
 836 {
 837     va_list ap;
 838
 839     va_start(ap, fmt);
 840     qtest_async_qmpv(global_qtest, fmt, ap);
 841     va_end(ap);
 842 }
 843
 844 void qmp_discard_response(const char *fmt, ...)
 845 {
 846     va_list ap;
 847
 848     va_start(ap, fmt);
 849     qtest_qmpv_discard_response(global_qtest, fmt, ap);
 850     va_end(ap);
 851 }
 852 char *hmp(const char *fmt, ...)
 853 {
 854     va_list ap;
 855     char *ret;
 856
 857     va_start(ap, fmt);
 858     ret = qtest_hmpv(global_qtest, fmt, ap);
 859     va_end(ap);
 860     return ret;
 861 }
 862
 863 bool qtest_big_endian(void)
 864 {
 865     const char *arch = qtest_get_arch();
 866     int i;
 867
 868     static const struct {
 869         const char *arch;
 870         bool big_endian;
 871     } endianness[] = {
 872         { "aarch64", false },
 873         { "alpha", false },
 874         { "arm", false },
 875         { "cris", false },
 876         { "i386", false },
 877         { "lm32", true },
 878         { "m68k", true },
 879         { "microblaze", true },
 880         { "microblazeel", false },
 881         { "mips", true },
 882         { "mips64", true },
 883         { "mips64el", false },
 884         { "mipsel", false },
 885         { "moxie", true },
 886         { "or32", true },
 887         { "ppc", true },
 888         { "ppc64", true },
 889         { "ppcemb", true },
 890         { "s390x", true },
 891         { "sh4", false },
 892         { "sh4eb", true },
 893         { "sparc", true },
 894         { "sparc64", true },
 895         { "unicore32", false },
 896         { "x86_64", false },
 897         { "xtensa", false },
 898         { "xtensaeb", true },
 899         {},
 900     };
 901
 902     for (i = 0; endianness[i].arch; i++) {
 903         if (strcmp(endianness[i].arch, arch) == 0) {
 904             return endianness[i].big_endian;
 905         }
 906     }
 907
 908     return false;
 909 }