tests/qtest/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 "libqos/libqtest.h"
  24 #include "qemu-common.h"
  25 #include "qemu/ctype.h"
  26 #include "qemu/cutils.h"
  27 #include "qapi/error.h"
  28 #include "qapi/qmp/json-parser.h"
  29 #include "qapi/qmp/qdict.h"
  30 #include "qapi/qmp/qjson.h"
  31 #include "qapi/qmp/qlist.h"
  32 #include "qapi/qmp/qstring.h"
  33
  34 #define MAX_IRQ 256
  35 #define SOCKET_TIMEOUT 50
  36 #define SOCKET_MAX_FDS 16
  37
  38
  39 typedef void (*QTestSendFn)(QTestState *s, const char *buf);
  40 typedef void (*ExternalSendFn)(void *s, const char *buf);
  41 typedef GString* (*QTestRecvFn)(QTestState *);
  42
  43 typedef struct QTestClientTransportOps {
  44     QTestSendFn     send;      /* for sending qtest commands */
  45
  46     /*
  47      * use external_send to send qtest command strings through functions which
  48      * do not accept a QTestState as the first parameter.
  49      */
  50     ExternalSendFn  external_send;
  51
  52     QTestRecvFn     recv_line; /* for receiving qtest command responses */
  53 } QTestTransportOps;
  54
  55 struct QTestState
  56 {
  57     int fd;
  58     int qmp_fd;
  59     pid_t qemu_pid;  /* our child QEMU process */
  60     int wstatus;
  61     int expected_status;
  62     bool big_endian;
  63     bool irq_level[MAX_IRQ];
  64     GString *rx;
  65     QTestTransportOps ops;
  66     GList *pending_events;
  67 };
  68
  69 static GHookList abrt_hooks;
  70 static struct sigaction sigact_old;
  71
  72 static int qtest_query_target_endianness(QTestState *s);
  73
  74 static void qtest_client_socket_send(QTestState*, const char *buf);
  75 static void socket_send(int fd, const char *buf, size_t size);
  76
  77 static GString *qtest_client_socket_recv_line(QTestState *);
  78
  79 static void qtest_client_set_tx_handler(QTestState *s, QTestSendFn send);
  80 static void qtest_client_set_rx_handler(QTestState *s, QTestRecvFn recv);
  81
  82 static int init_socket(const char *socket_path)
  83 {
  84     int sock = qtest_socket_server(socket_path);
  85     qemu_set_cloexec(sock);
  86     return sock;
  87 }
  88
  89 static int socket_accept(int sock)
  90 {
  91     struct sockaddr_un addr;
  92     socklen_t addrlen;
  93     int ret;
  94     struct timeval timeout = { .tv_sec = SOCKET_TIMEOUT,
  95                                .tv_usec = 0 };
  96
  97     if (qemu_setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO,
  98                         (void *)&timeout, sizeof(timeout))) {
  99         fprintf(stderr, "%s failed to set SO_RCVTIMEO: %s\n",
 100                 __func__, strerror(errno));
 101         close(sock);
 102         return -1;
 103     }
 104
 105     do {
 106         addrlen = sizeof(addr);
 107         ret = accept(sock, (struct sockaddr *)&addr, &addrlen);
 108     } while (ret == -1 && errno == EINTR);
 109     if (ret == -1) {
 110         fprintf(stderr, "%s failed: %s\n", __func__, strerror(errno));
 111     }
 112     close(sock);
 113
 114     return ret;
 115 }
 116
 117 bool qtest_probe_child(QTestState *s)
 118 {
 119     pid_t pid = s->qemu_pid;
 120
 121     if (pid != -1) {
 122         pid = waitpid(pid, &s->wstatus, WNOHANG);
 123         if (pid == 0) {
 124             return true;
 125         }
 126         s->qemu_pid = -1;
 127     }
 128     return false;
 129 }
 130
 131 void qtest_set_expected_status(QTestState *s, int status)
 132 {
 133     s->expected_status = status;
 134 }
 135
 136 void qtest_kill_qemu(QTestState *s)
 137 {
 138     pid_t pid = s->qemu_pid;
 139     int wstatus;
 140
 141     /* Skip wait if qtest_probe_child already reaped.  */
 142     if (pid != -1) {
 143         kill(pid, SIGTERM);
 144         TFR(pid = waitpid(s->qemu_pid, &s->wstatus, 0));
 145         assert(pid == s->qemu_pid);
 146         s->qemu_pid = -1;
 147     }
 148
 149     /*
 150      * Check whether qemu exited with expected exit status; anything else is
 151      * fishy and should be logged with as much detail as possible.
 152      */
 153     wstatus = s->wstatus;
 154     if (WIFEXITED(wstatus) && WEXITSTATUS(wstatus) != s->expected_status) {
 155         fprintf(stderr, "%s:%d: kill_qemu() tried to terminate QEMU "
 156                 "process but encountered exit status %d (expected %d)\n",
 157                 __FILE__, __LINE__, WEXITSTATUS(wstatus), s->expected_status);
 158         abort();
 159     } else if (WIFSIGNALED(wstatus)) {
 160         int sig = WTERMSIG(wstatus);
 161         const char *signame = strsignal(sig) ?: "unknown ???";
 162         const char *dump = WCOREDUMP(wstatus) ? " (core dumped)" : "";
 163
 164         fprintf(stderr, "%s:%d: kill_qemu() detected QEMU death "
 165                 "from signal %d (%s)%s\n",
 166                 __FILE__, __LINE__, sig, signame, dump);
 167         abort();
 168     }
 169 }
 170
 171 static void kill_qemu_hook_func(void *s)
 172 {
 173     qtest_kill_qemu(s);
 174 }
 175
 176 static void sigabrt_handler(int signo)
 177 {
 178     g_hook_list_invoke(&abrt_hooks, FALSE);
 179 }
 180
 181 static void setup_sigabrt_handler(void)
 182 {
 183     struct sigaction sigact;
 184
 185     /* Catch SIGABRT to clean up on g_assert() failure */
 186     sigact = (struct sigaction){
 187         .sa_handler = sigabrt_handler,
 188         .sa_flags = SA_RESETHAND,
 189     };
 190     sigemptyset(&sigact.sa_mask);
 191     sigaction(SIGABRT, &sigact, &sigact_old);
 192 }
 193
 194 static void cleanup_sigabrt_handler(void)
 195 {
 196     sigaction(SIGABRT, &sigact_old, NULL);
 197 }
 198
 199 static bool hook_list_is_empty(GHookList *hook_list)
 200 {
 201     GHook *hook = g_hook_first_valid(hook_list, TRUE);
 202
 203     if (!hook) {
 204         return false;
 205     }
 206
 207     g_hook_unref(hook_list, hook);
 208     return true;
 209 }
 210
 211 void qtest_add_abrt_handler(GHookFunc fn, const void *data)
 212 {
 213     GHook *hook;
 214
 215     if (!abrt_hooks.is_setup) {
 216         g_hook_list_init(&abrt_hooks, sizeof(GHook));
 217     }
 218
 219     /* Only install SIGABRT handler once */
 220     if (hook_list_is_empty(&abrt_hooks)) {
 221         setup_sigabrt_handler();
 222     }
 223
 224     hook = g_hook_alloc(&abrt_hooks);
 225     hook->func = fn;
 226     hook->data = (void *)data;
 227
 228     g_hook_prepend(&abrt_hooks, hook);
 229 }
 230
 231 void qtest_remove_abrt_handler(void *data)
 232 {
 233     GHook *hook = g_hook_find_data(&abrt_hooks, TRUE, data);
 234     g_hook_destroy_link(&abrt_hooks, hook);
 235
 236     /* Uninstall SIGABRT handler on last instance */
 237     if (hook_list_is_empty(&abrt_hooks)) {
 238         cleanup_sigabrt_handler();
 239     }
 240 }
 241
 242 static const char *qtest_qemu_binary(void)
 243 {
 244     const char *qemu_bin;
 245
 246     qemu_bin = getenv("QTEST_QEMU_BINARY");
 247     if (!qemu_bin) {
 248         fprintf(stderr, "Environment variable QTEST_QEMU_BINARY required\n");
 249         exit(1);
 250     }
 251
 252     return qemu_bin;
 253 }
 254
 255 QTestState *qtest_init_without_qmp_handshake(const char *extra_args)
 256 {
 257     QTestState *s;
 258     int sock, qmpsock, i;
 259     gchar *socket_path;
 260     gchar *qmp_socket_path;
 261     gchar *command;
 262     const char *qemu_binary = qtest_qemu_binary();
 263
 264     s = g_new(QTestState, 1);
 265
 266     socket_path = g_strdup_printf("/tmp/qtest-%d.sock", getpid());
 267     qmp_socket_path = g_strdup_printf("/tmp/qtest-%d.qmp", getpid());
 268
 269     /* It's possible that if an earlier test run crashed it might
 270      * have left a stale unix socket lying around. Delete any
 271      * stale old socket to avoid spurious test failures with
 272      * tests/libqtest.c:70:init_socket: assertion failed (ret != -1): (-1 != -1)
 273      */
 274     unlink(socket_path);
 275     unlink(qmp_socket_path);
 276
 277     sock = init_socket(socket_path);
 278     qmpsock = init_socket(qmp_socket_path);
 279
 280     qtest_client_set_rx_handler(s, qtest_client_socket_recv_line);
 281     qtest_client_set_tx_handler(s, qtest_client_socket_send);
 282
 283     qtest_add_abrt_handler(kill_qemu_hook_func, s);
 284
 285     command = g_strdup_printf("exec %s "
 286                               "-qtest unix:%s "
 287                               "-qtest-log %s "
 288                               "-chardev socket,path=%s,id=char0 "
 289                               "-mon chardev=char0,mode=control "
 290                               "-display none "
 291                               "%s"
 292                               " -accel qtest", qemu_binary, socket_path,
 293                               getenv("QTEST_LOG") ? "/dev/fd/2" : "/dev/null",
 294                               qmp_socket_path,
 295                               extra_args ?: "");
 296
 297     g_test_message("starting QEMU: %s", command);
 298
 299     s->pending_events = NULL;
 300     s->wstatus = 0;
 301     s->expected_status = 0;
 302     s->qemu_pid = fork();
 303     if (s->qemu_pid == 0) {
 304         g_setenv("QEMU_AUDIO_DRV", "none", true);
 305         execlp("/bin/sh", "sh", "-c", command, NULL);
 306         exit(1);
 307     }
 308
 309     g_free(command);
 310     s->fd = socket_accept(sock);
 311     if (s->fd >= 0) {
 312         s->qmp_fd = socket_accept(qmpsock);
 313     }
 314     unlink(socket_path);
 315     unlink(qmp_socket_path);
 316     g_free(socket_path);
 317     g_free(qmp_socket_path);
 318
 319     g_assert(s->fd >= 0 && s->qmp_fd >= 0);
 320
 321     s->rx = g_string_new("");
 322     for (i = 0; i < MAX_IRQ; i++) {
 323         s->irq_level[i] = false;
 324     }
 325
 326     if (getenv("QTEST_STOP")) {
 327         kill(s->qemu_pid, SIGSTOP);
 328     }
 329
 330     /* ask endianness of the target */
 331
 332     s->big_endian = qtest_query_target_endianness(s);
 333
 334     return s;
 335 }
 336
 337 QTestState *qtest_init(const char *extra_args)
 338 {
 339     QTestState *s = qtest_init_without_qmp_handshake(extra_args);
 340     QDict *greeting;
 341
 342     /* Read the QMP greeting and then do the handshake */
 343     greeting = qtest_qmp_receive(s);
 344     qobject_unref(greeting);
 345     qobject_unref(qtest_qmp(s, "{ 'execute': 'qmp_capabilities' }"));
 346
 347     return s;
 348 }
 349
 350 QTestState *qtest_vinitf(const char *fmt, va_list ap)
 351 {
 352     char *args = g_strdup_vprintf(fmt, ap);
 353     QTestState *s;
 354
 355     s = qtest_init(args);
 356     g_free(args);
 357     return s;
 358 }
 359
 360 QTestState *qtest_initf(const char *fmt, ...)
 361 {
 362     va_list ap;
 363     QTestState *s;
 364
 365     va_start(ap, fmt);
 366     s = qtest_vinitf(fmt, ap);
 367     va_end(ap);
 368     return s;
 369 }
 370
 371 QTestState *qtest_init_with_serial(const char *extra_args, int *sock_fd)
 372 {
 373     int sock_fd_init;
 374     char *sock_path, sock_dir[] = "/tmp/qtest-serial-XXXXXX";
 375     QTestState *qts;
 376
 377     g_assert_true(mkdtemp(sock_dir) != NULL);
 378     sock_path = g_strdup_printf("%s/sock", sock_dir);
 379
 380     sock_fd_init = init_socket(sock_path);
 381
 382     qts = qtest_initf("-chardev socket,id=s0,path=%s -serial chardev:s0 %s",
 383                       sock_path, extra_args);
 384
 385     *sock_fd = socket_accept(sock_fd_init);
 386
 387     unlink(sock_path);
 388     g_free(sock_path);
 389     rmdir(sock_dir);
 390
 391     g_assert_true(*sock_fd >= 0);
 392
 393     return qts;
 394 }
 395
 396 void qtest_quit(QTestState *s)
 397 {
 398     qtest_remove_abrt_handler(s);
 399
 400     qtest_kill_qemu(s);
 401     close(s->fd);
 402     close(s->qmp_fd);
 403     g_string_free(s->rx, true);
 404
 405     for (GList *it = s->pending_events; it != NULL; it = it->next) {
 406         qobject_unref((QDict *)it->data);
 407     }
 408
 409     g_list_free(s->pending_events);
 410
 411     g_free(s);
 412 }
 413
 414 static void socket_send(int fd, const char *buf, size_t size)
 415 {
 416     size_t offset;
 417
 418     offset = 0;
 419     while (offset < size) {
 420         ssize_t len;
 421
 422         len = write(fd, buf + offset, size - offset);
 423         if (len == -1 && errno == EINTR) {
 424             continue;
 425         }
 426
 427         g_assert_cmpint(len, >, 0);
 428
 429         offset += len;
 430     }
 431 }
 432
 433 static void qtest_client_socket_send(QTestState *s, const char *buf)
 434 {
 435     socket_send(s->fd, buf, strlen(buf));
 436 }
 437
 438 static void GCC_FMT_ATTR(2, 3) qtest_sendf(QTestState *s, const char *fmt, ...)
 439 {
 440     va_list ap;
 441
 442     va_start(ap, fmt);
 443     gchar *str = g_strdup_vprintf(fmt, ap);
 444     va_end(ap);
 445
 446     s->ops.send(s, str);
 447     g_free(str);
 448 }
 449
 450 /* Sends a message and file descriptors to the socket.
 451  * It's needed for qmp-commands like getfd/add-fd */
 452 static void socket_send_fds(int socket_fd, int *fds, size_t fds_num,
 453                             const char *buf, size_t buf_size)
 454 {
 455     ssize_t ret;
 456     struct msghdr msg = { 0 };
 457     char control[CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS)] = { 0 };
 458     size_t fdsize = sizeof(int) * fds_num;
 459     struct cmsghdr *cmsg;
 460     struct iovec iov = { .iov_base = (char *)buf, .iov_len = buf_size };
 461
 462     msg.msg_iov = &iov;
 463     msg.msg_iovlen = 1;
 464
 465     if (fds && fds_num > 0) {
 466         g_assert_cmpuint(fds_num, <, SOCKET_MAX_FDS);
 467
 468         msg.msg_control = control;
 469         msg.msg_controllen = CMSG_SPACE(fdsize);
 470
 471         cmsg = CMSG_FIRSTHDR(&msg);
 472         cmsg->cmsg_len = CMSG_LEN(fdsize);
 473         cmsg->cmsg_level = SOL_SOCKET;
 474         cmsg->cmsg_type = SCM_RIGHTS;
 475         memcpy(CMSG_DATA(cmsg), fds, fdsize);
 476     }
 477
 478     do {
 479         ret = sendmsg(socket_fd, &msg, 0);
 480     } while (ret < 0 && errno == EINTR);
 481     g_assert_cmpint(ret, >, 0);
 482 }
 483
 484 static GString *qtest_client_socket_recv_line(QTestState *s)
 485 {
 486     GString *line;
 487     size_t offset;
 488     char *eol;
 489
 490     while ((eol = strchr(s->rx->str, '\n')) == NULL) {
 491         ssize_t len;
 492         char buffer[1024];
 493
 494         len = read(s->fd, buffer, sizeof(buffer));
 495         if (len == -1 && errno == EINTR) {
 496             continue;
 497         }
 498
 499         if (len == -1 || len == 0) {
 500             fprintf(stderr, "Broken pipe\n");
 501             abort();
 502         }
 503
 504         g_string_append_len(s->rx, buffer, len);
 505     }
 506
 507     offset = eol - s->rx->str;
 508     line = g_string_new_len(s->rx->str, offset);
 509     g_string_erase(s->rx, 0, offset + 1);
 510
 511     return line;
 512 }
 513
 514 static gchar **qtest_rsp_args(QTestState *s, int expected_args)
 515 {
 516     GString *line;
 517     gchar **words;
 518     int i;
 519
 520 redo:
 521     line = s->ops.recv_line(s);
 522     words = g_strsplit(line->str, " ", 0);
 523     g_string_free(line, TRUE);
 524
 525     if (strcmp(words[0], "IRQ") == 0) {
 526         long irq;
 527         int ret;
 528
 529         g_assert(words[1] != NULL);
 530         g_assert(words[2] != NULL);
 531
 532         ret = qemu_strtol(words[2], NULL, 0, &irq);
 533         g_assert(!ret);
 534         g_assert_cmpint(irq, >=, 0);
 535         g_assert_cmpint(irq, <, MAX_IRQ);
 536
 537         if (strcmp(words[1], "raise") == 0) {
 538             s->irq_level[irq] = true;
 539         } else {
 540             s->irq_level[irq] = false;
 541         }
 542
 543         g_strfreev(words);
 544         goto redo;
 545     }
 546
 547     g_assert(words[0] != NULL);
 548     g_assert_cmpstr(words[0], ==, "OK");
 549
 550     for (i = 0; i < expected_args; i++) {
 551         g_assert(words[i] != NULL);
 552     }
 553
 554     return words;
 555 }
 556
 557 static void qtest_rsp(QTestState *s)
 558 {
 559     gchar **words = qtest_rsp_args(s, 0);
 560
 561     g_strfreev(words);
 562 }
 563
 564 static int qtest_query_target_endianness(QTestState *s)
 565 {
 566     gchar **args;
 567     int big_endian;
 568
 569     qtest_sendf(s, "endianness\n");
 570     args = qtest_rsp_args(s, 1);
 571     g_assert(strcmp(args[1], "big") == 0 || strcmp(args[1], "little") == 0);
 572     big_endian = strcmp(args[1], "big") == 0;
 573     g_strfreev(args);
 574
 575     return big_endian;
 576 }
 577
 578 typedef struct {
 579     JSONMessageParser parser;
 580     QDict *response;
 581 } QMPResponseParser;
 582
 583 static void qmp_response(void *opaque, QObject *obj, Error *err)
 584 {
 585     QMPResponseParser *qmp = opaque;
 586
 587     assert(!obj != !err);
 588
 589     if (err) {
 590         error_prepend(&err, "QMP JSON response parsing failed: ");
 591         error_report_err(err);
 592         abort();
 593     }
 594
 595     g_assert(!qmp->response);
 596     qmp->response = qobject_to(QDict, obj);
 597     g_assert(qmp->response);
 598 }
 599
 600 QDict *qmp_fd_receive(int fd)
 601 {
 602     QMPResponseParser qmp;
 603     bool log = getenv("QTEST_LOG") != NULL;
 604
 605     qmp.response = NULL;
 606     json_message_parser_init(&qmp.parser, qmp_response, &qmp, NULL);
 607     while (!qmp.response) {
 608         ssize_t len;
 609         char c;
 610
 611         len = read(fd, &c, 1);
 612         if (len == -1 && errno == EINTR) {
 613             continue;
 614         }
 615
 616         if (len == -1 || len == 0) {
 617             fprintf(stderr, "Broken pipe\n");
 618             abort();
 619         }
 620
 621         if (log) {
 622             len = write(2, &c, 1);
 623         }
 624         json_message_parser_feed(&qmp.parser, &c, 1);
 625     }
 626     json_message_parser_destroy(&qmp.parser);
 627
 628     return qmp.response;
 629 }
 630
 631 QDict *qtest_qmp_receive(QTestState *s)
 632 {
 633     while (true) {
 634         QDict *response = qtest_qmp_receive_dict(s);
 635
 636         if (!qdict_get_try_str(response, "event")) {
 637             return response;
 638         }
 639         /* Stash the event for a later consumption */
 640         s->pending_events = g_list_append(s->pending_events, response);
 641     }
 642 }
 643
 644 QDict *qtest_qmp_receive_dict(QTestState *s)
 645 {
 646     return qmp_fd_receive(s->qmp_fd);
 647 }
 648
 649 int qtest_socket_server(const char *socket_path)
 650 {
 651     struct sockaddr_un addr;
 652     int sock;
 653     int ret;
 654
 655     sock = socket(PF_UNIX, SOCK_STREAM, 0);
 656     g_assert_cmpint(sock, !=, -1);
 657
 658     addr.sun_family = AF_UNIX;
 659     snprintf(addr.sun_path, sizeof(addr.sun_path), "%s", socket_path);
 660
 661     do {
 662         ret = bind(sock, (struct sockaddr *)&addr, sizeof(addr));
 663     } while (ret == -1 && errno == EINTR);
 664     g_assert_cmpint(ret, !=, -1);
 665     ret = listen(sock, 1);
 666     g_assert_cmpint(ret, !=, -1);
 667
 668     return sock;
 669 }
 670
 671 /**
 672  * Allow users to send a message without waiting for the reply,
 673  * in the case that they choose to discard all replies up until
 674  * a particular EVENT is received.
 675  */
 676 void qmp_fd_vsend_fds(int fd, int *fds, size_t fds_num,
 677                       const char *fmt, va_list ap)
 678 {
 679     QObject *qobj;
 680
 681     /* Going through qobject ensures we escape strings properly */
 682     qobj = qobject_from_vjsonf_nofail(fmt, ap);
 683
 684     /* No need to send anything for an empty QObject.  */
 685     if (qobj) {
 686         int log = getenv("QTEST_LOG") != NULL;
 687         GString *str = qobject_to_json(qobj);
 688
 689         /*
 690          * BUG: QMP doesn't react to input until it sees a newline, an
 691          * object, or an array.  Work-around: give it a newline.
 692          */
 693         g_string_append_c(str, '\n');
 694
 695         if (log) {
 696             fprintf(stderr, "%s", str->str);
 697         }
 698         /* Send QMP request */
 699         if (fds && fds_num > 0) {
 700             socket_send_fds(fd, fds, fds_num, str->str, str->len);
 701         } else {
 702             socket_send(fd, str->str, str->len);
 703         }
 704
 705         g_string_free(str, true);
 706         qobject_unref(qobj);
 707     }
 708 }
 709
 710 void qmp_fd_vsend(int fd, const char *fmt, va_list ap)
 711 {
 712     qmp_fd_vsend_fds(fd, NULL, 0, fmt, ap);
 713 }
 714
 715 void qtest_qmp_vsend_fds(QTestState *s, int *fds, size_t fds_num,
 716                          const char *fmt, va_list ap)
 717 {
 718     qmp_fd_vsend_fds(s->qmp_fd, fds, fds_num, fmt, ap);
 719 }
 720
 721 void qtest_qmp_vsend(QTestState *s, const char *fmt, va_list ap)
 722 {
 723     qmp_fd_vsend_fds(s->qmp_fd, NULL, 0, fmt, ap);
 724 }
 725
 726 QDict *qmp_fdv(int fd, const char *fmt, va_list ap)
 727 {
 728     qmp_fd_vsend_fds(fd, NULL, 0, fmt, ap);
 729
 730     return qmp_fd_receive(fd);
 731 }
 732
 733 QDict *qtest_vqmp_fds(QTestState *s, int *fds, size_t fds_num,
 734                       const char *fmt, va_list ap)
 735 {
 736     qtest_qmp_vsend_fds(s, fds, fds_num, fmt, ap);
 737
 738     /* Receive reply */
 739     return qtest_qmp_receive(s);
 740 }
 741
 742 QDict *qtest_vqmp(QTestState *s, const char *fmt, va_list ap)
 743 {
 744     qtest_qmp_vsend(s, fmt, ap);
 745
 746     /* Receive reply */
 747     return qtest_qmp_receive(s);
 748 }
 749
 750 QDict *qmp_fd(int fd, const char *fmt, ...)
 751 {
 752     va_list ap;
 753     QDict *response;
 754
 755     va_start(ap, fmt);
 756     response = qmp_fdv(fd, fmt, ap);
 757     va_end(ap);
 758     return response;
 759 }
 760
 761 void qmp_fd_send(int fd, const char *fmt, ...)
 762 {
 763     va_list ap;
 764
 765     va_start(ap, fmt);
 766     qmp_fd_vsend(fd, fmt, ap);
 767     va_end(ap);
 768 }
 769
 770 QDict *qtest_qmp_fds(QTestState *s, int *fds, size_t fds_num,
 771                      const char *fmt, ...)
 772 {
 773     va_list ap;
 774     QDict *response;
 775
 776     va_start(ap, fmt);
 777     response = qtest_vqmp_fds(s, fds, fds_num, fmt, ap);
 778     va_end(ap);
 779     return response;
 780 }
 781
 782 QDict *qtest_qmp(QTestState *s, const char *fmt, ...)
 783 {
 784     va_list ap;
 785     QDict *response;
 786
 787     va_start(ap, fmt);
 788     response = qtest_vqmp(s, fmt, ap);
 789     va_end(ap);
 790     return response;
 791 }
 792
 793 void qtest_qmp_send(QTestState *s, const char *fmt, ...)
 794 {
 795     va_list ap;
 796
 797     va_start(ap, fmt);
 798     qtest_qmp_vsend(s, fmt, ap);
 799     va_end(ap);
 800 }
 801
 802 void qmp_fd_vsend_raw(int fd, const char *fmt, va_list ap)
 803 {
 804     bool log = getenv("QTEST_LOG") != NULL;
 805     char *str = g_strdup_vprintf(fmt, ap);
 806
 807     if (log) {
 808         fprintf(stderr, "%s", str);
 809     }
 810     socket_send(fd, str, strlen(str));
 811     g_free(str);
 812 }
 813
 814 void qmp_fd_send_raw(int fd, const char *fmt, ...)
 815 {
 816     va_list ap;
 817
 818     va_start(ap, fmt);
 819     qmp_fd_vsend_raw(fd, fmt, ap);
 820     va_end(ap);
 821 }
 822
 823 void qtest_qmp_send_raw(QTestState *s, const char *fmt, ...)
 824 {
 825     va_list ap;
 826
 827     va_start(ap, fmt);
 828     qmp_fd_vsend_raw(s->qmp_fd, fmt, ap);
 829     va_end(ap);
 830 }
 831
 832 QDict *qtest_qmp_event_ref(QTestState *s, const char *event)
 833 {
 834     while (s->pending_events) {
 835
 836         GList *first = s->pending_events;
 837         QDict *response = (QDict *)first->data;
 838
 839         s->pending_events = g_list_delete_link(s->pending_events, first);
 840
 841         if (!strcmp(qdict_get_str(response, "event"), event)) {
 842             return response;
 843         }
 844         qobject_unref(response);
 845     }
 846     return NULL;
 847 }
 848
 849 QDict *qtest_qmp_eventwait_ref(QTestState *s, const char *event)
 850 {
 851     QDict *response = qtest_qmp_event_ref(s, event);
 852
 853     if (response) {
 854         return response;
 855     }
 856
 857     for (;;) {
 858         response = qtest_qmp_receive_dict(s);
 859         if ((qdict_haskey(response, "event")) &&
 860             (strcmp(qdict_get_str(response, "event"), event) == 0)) {
 861             return response;
 862         }
 863         qobject_unref(response);
 864     }
 865 }
 866
 867 void qtest_qmp_eventwait(QTestState *s, const char *event)
 868 {
 869     QDict *response;
 870
 871     response = qtest_qmp_eventwait_ref(s, event);
 872     qobject_unref(response);
 873 }
 874
 875 char *qtest_vhmp(QTestState *s, const char *fmt, va_list ap)
 876 {
 877     char *cmd;
 878     QDict *resp;
 879     char *ret;
 880
 881     cmd = g_strdup_vprintf(fmt, ap);
 882     resp = qtest_qmp(s, "{'execute': 'human-monitor-command',"
 883                      " 'arguments': {'command-line': %s}}",
 884                      cmd);
 885     ret = g_strdup(qdict_get_try_str(resp, "return"));
 886     g_assert(ret);
 887     qobject_unref(resp);
 888     g_free(cmd);
 889     return ret;
 890 }
 891
 892 char *qtest_hmp(QTestState *s, const char *fmt, ...)
 893 {
 894     va_list ap;
 895     char *ret;
 896
 897     va_start(ap, fmt);
 898     ret = qtest_vhmp(s, fmt, ap);
 899     va_end(ap);
 900     return ret;
 901 }
 902
 903 const char *qtest_get_arch(void)
 904 {
 905     const char *qemu = qtest_qemu_binary();
 906     const char *end = strrchr(qemu, '-');
 907
 908     if (!end) {
 909         fprintf(stderr, "Can't determine architecture from binary name.\n");
 910         exit(1);
 911     }
 912
 913     if (!strstr(qemu, "-system-")) {
 914         fprintf(stderr, "QTEST_QEMU_BINARY must end with *-system-<arch> "
 915                 "where 'arch' is the target\narchitecture (x86_64, aarch64, "
 916                 "etc).\n");
 917         exit(1);
 918     }
 919
 920     return end + 1;
 921 }
 922
 923 bool qtest_get_irq(QTestState *s, int num)
 924 {
 925     /* dummy operation in order to make sure irq is up to date */
 926     qtest_inb(s, 0);
 927
 928     return s->irq_level[num];
 929 }
 930
 931 void qtest_module_load(QTestState *s, const char *prefix, const char *libname)
 932 {
 933     qtest_sendf(s, "module_load %s %s\n", prefix, libname);
 934     qtest_rsp(s);
 935 }
 936
 937 static int64_t qtest_clock_rsp(QTestState *s)
 938 {
 939     gchar **words;
 940     int64_t clock;
 941     words = qtest_rsp_args(s, 2);
 942     clock = g_ascii_strtoll(words[1], NULL, 0);
 943     g_strfreev(words);
 944     return clock;
 945 }
 946
 947 int64_t qtest_clock_step_next(QTestState *s)
 948 {
 949     qtest_sendf(s, "clock_step\n");
 950     return qtest_clock_rsp(s);
 951 }
 952
 953 int64_t qtest_clock_step(QTestState *s, int64_t step)
 954 {
 955     qtest_sendf(s, "clock_step %"PRIi64"\n", step);
 956     return qtest_clock_rsp(s);
 957 }
 958
 959 int64_t qtest_clock_set(QTestState *s, int64_t val)
 960 {
 961     qtest_sendf(s, "clock_set %"PRIi64"\n", val);
 962     return qtest_clock_rsp(s);
 963 }
 964
 965 void qtest_irq_intercept_out(QTestState *s, const char *qom_path)
 966 {
 967     qtest_sendf(s, "irq_intercept_out %s\n", qom_path);
 968     qtest_rsp(s);
 969 }
 970
 971 void qtest_irq_intercept_in(QTestState *s, const char *qom_path)
 972 {
 973     qtest_sendf(s, "irq_intercept_in %s\n", qom_path);
 974     qtest_rsp(s);
 975 }
 976
 977 void qtest_set_irq_in(QTestState *s, const char *qom_path, const char *name,
 978                       int num, int level)
 979 {
 980     if (!name) {
 981         name = "unnamed-gpio-in";
 982     }
 983     qtest_sendf(s, "set_irq_in %s %s %d %d\n", qom_path, name, num, level);
 984     qtest_rsp(s);
 985 }
 986
 987 static void qtest_out(QTestState *s, const char *cmd, uint16_t addr, uint32_t value)
 988 {
 989     qtest_sendf(s, "%s 0x%x 0x%x\n", cmd, addr, value);
 990     qtest_rsp(s);
 991 }
 992
 993 void qtest_outb(QTestState *s, uint16_t addr, uint8_t value)
 994 {
 995     qtest_out(s, "outb", addr, value);
 996 }
 997
 998 void qtest_outw(QTestState *s, uint16_t addr, uint16_t value)
 999 {
1000     qtest_out(s, "outw", addr, value);
1001 }
1002
1003 void qtest_outl(QTestState *s, uint16_t addr, uint32_t value)
1004 {
1005     qtest_out(s, "outl", addr, value);
1006 }
1007
1008 static uint32_t qtest_in(QTestState *s, const char *cmd, uint16_t addr)
1009 {
1010     gchar **args;
1011     int ret;
1012     unsigned long value;
1013
1014     qtest_sendf(s, "%s 0x%x\n", cmd, addr);
1015     args = qtest_rsp_args(s, 2);
1016     ret = qemu_strtoul(args[1], NULL, 0, &value);
1017     g_assert(!ret && value <= UINT32_MAX);
1018     g_strfreev(args);
1019
1020     return value;
1021 }
1022
1023 uint8_t qtest_inb(QTestState *s, uint16_t addr)
1024 {
1025     return qtest_in(s, "inb", addr);
1026 }
1027
1028 uint16_t qtest_inw(QTestState *s, uint16_t addr)
1029 {
1030     return qtest_in(s, "inw", addr);
1031 }
1032
1033 uint32_t qtest_inl(QTestState *s, uint16_t addr)
1034 {
1035     return qtest_in(s, "inl", addr);
1036 }
1037
1038 static void qtest_write(QTestState *s, const char *cmd, uint64_t addr,
1039                         uint64_t value)
1040 {
1041     qtest_sendf(s, "%s 0x%" PRIx64 " 0x%" PRIx64 "\n", cmd, addr, value);
1042     qtest_rsp(s);
1043 }
1044
1045 void qtest_writeb(QTestState *s, uint64_t addr, uint8_t value)
1046 {
1047     qtest_write(s, "writeb", addr, value);
1048 }
1049
1050 void qtest_writew(QTestState *s, uint64_t addr, uint16_t value)
1051 {
1052     qtest_write(s, "writew", addr, value);
1053 }
1054
1055 void qtest_writel(QTestState *s, uint64_t addr, uint32_t value)
1056 {
1057     qtest_write(s, "writel", addr, value);
1058 }
1059
1060 void qtest_writeq(QTestState *s, uint64_t addr, uint64_t value)
1061 {
1062     qtest_write(s, "writeq", addr, value);
1063 }
1064
1065 static uint64_t qtest_read(QTestState *s, const char *cmd, uint64_t addr)
1066 {
1067     gchar **args;
1068     int ret;
1069     uint64_t value;
1070
1071     qtest_sendf(s, "%s 0x%" PRIx64 "\n", cmd, addr);
1072     args = qtest_rsp_args(s, 2);
1073     ret = qemu_strtou64(args[1], NULL, 0, &value);
1074     g_assert(!ret);
1075     g_strfreev(args);
1076
1077     return value;
1078 }
1079
1080 uint8_t qtest_readb(QTestState *s, uint64_t addr)
1081 {
1082     return qtest_read(s, "readb", addr);
1083 }
1084
1085 uint16_t qtest_readw(QTestState *s, uint64_t addr)
1086 {
1087     return qtest_read(s, "readw", addr);
1088 }
1089
1090 uint32_t qtest_readl(QTestState *s, uint64_t addr)
1091 {
1092     return qtest_read(s, "readl", addr);
1093 }
1094
1095 uint64_t qtest_readq(QTestState *s, uint64_t addr)
1096 {
1097     return qtest_read(s, "readq", addr);
1098 }
1099
1100 static int hex2nib(char ch)
1101 {
1102     if (ch >= '0' && ch <= '9') {
1103         return ch - '0';
1104     } else if (ch >= 'a' && ch <= 'f') {
1105         return 10 + (ch - 'a');
1106     } else if (ch >= 'A' && ch <= 'F') {
1107         return 10 + (ch - 'a');
1108     } else {
1109         return -1;
1110     }
1111 }
1112
1113 void qtest_memread(QTestState *s, uint64_t addr, void *data, size_t size)
1114 {
1115     uint8_t *ptr = data;
1116     gchar **args;
1117     size_t i;
1118
1119     if (!size) {
1120         return;
1121     }
1122
1123     qtest_sendf(s, "read 0x%" PRIx64 " 0x%zx\n", addr, size);
1124     args = qtest_rsp_args(s, 2);
1125
1126     for (i = 0; i < size; i++) {
1127         ptr[i] = hex2nib(args[1][2 + (i * 2)]) << 4;
1128         ptr[i] |= hex2nib(args[1][2 + (i * 2) + 1]);
1129     }
1130
1131     g_strfreev(args);
1132 }
1133
1134 uint64_t qtest_rtas_call(QTestState *s, const char *name,
1135                          uint32_t nargs, uint64_t args,
1136                          uint32_t nret, uint64_t ret)
1137 {
1138     qtest_sendf(s, "rtas %s %u 0x%"PRIx64" %u 0x%"PRIx64"\n",
1139                 name, nargs, args, nret, ret);
1140     qtest_rsp(s);
1141     return 0;
1142 }
1143
1144 void qtest_add_func(const char *str, void (*fn)(void))
1145 {
1146     gchar *path = g_strdup_printf("/%s/%s", qtest_get_arch(), str);
1147     g_test_add_func(path, fn);
1148     g_free(path);
1149 }
1150
1151 void qtest_add_data_func_full(const char *str, void *data,
1152                               void (*fn)(const void *),
1153                               GDestroyNotify data_free_func)
1154 {
1155     gchar *path = g_strdup_printf("/%s/%s", qtest_get_arch(), str);
1156     g_test_add_data_func_full(path, data, fn, data_free_func);
1157     g_free(path);
1158 }
1159
1160 void qtest_add_data_func(const char *str, const void *data,
1161                          void (*fn)(const void *))
1162 {
1163     gchar *path = g_strdup_printf("/%s/%s", qtest_get_arch(), str);
1164     g_test_add_data_func(path, data, fn);
1165     g_free(path);
1166 }
1167
1168 void qtest_bufwrite(QTestState *s, uint64_t addr, const void *data, size_t size)
1169 {
1170     gchar *bdata;
1171
1172     bdata = g_base64_encode(data, size);
1173     qtest_sendf(s, "b64write 0x%" PRIx64 " 0x%zx ", addr, size);
1174     s->ops.send(s, bdata);
1175     s->ops.send(s, "\n");
1176     qtest_rsp(s);
1177     g_free(bdata);
1178 }
1179
1180 void qtest_bufread(QTestState *s, uint64_t addr, void *data, size_t size)
1181 {
1182     gchar **args;
1183     size_t len;
1184
1185     qtest_sendf(s, "b64read 0x%" PRIx64 " 0x%zx\n", addr, size);
1186     args = qtest_rsp_args(s, 2);
1187
1188     g_base64_decode_inplace(args[1], &len);
1189     if (size != len) {
1190         fprintf(stderr, "bufread: asked for %zu bytes but decoded %zu\n",
1191                 size, len);
1192         len = MIN(len, size);
1193     }
1194
1195     memcpy(data, args[1], len);
1196     g_strfreev(args);
1197 }
1198
1199 void qtest_memwrite(QTestState *s, uint64_t addr, const void *data, size_t size)
1200 {
1201     const uint8_t *ptr = data;
1202     size_t i;
1203     char *enc;
1204
1205     if (!size) {
1206         return;
1207     }
1208
1209     enc = g_malloc(2 * size + 1);
1210
1211     for (i = 0; i < size; i++) {
1212         sprintf(&enc[i * 2], "%02x", ptr[i]);
1213     }
1214
1215     qtest_sendf(s, "write 0x%" PRIx64 " 0x%zx 0x%s\n", addr, size, enc);
1216     qtest_rsp(s);
1217     g_free(enc);
1218 }
1219
1220 void qtest_memset(QTestState *s, uint64_t addr, uint8_t pattern, size_t size)
1221 {
1222     qtest_sendf(s, "memset 0x%" PRIx64 " 0x%zx 0x%02x\n", addr, size, pattern);
1223     qtest_rsp(s);
1224 }
1225
1226 void qtest_qmp_assert_success(QTestState *qts, const char *fmt, ...)
1227 {
1228     va_list ap;
1229     QDict *response;
1230
1231     va_start(ap, fmt);
1232     response = qtest_vqmp(qts, fmt, ap);
1233     va_end(ap);
1234
1235     g_assert(response);
1236     if (!qdict_haskey(response, "return")) {
1237         GString *s = qobject_to_json_pretty(QOBJECT(response), true);
1238         g_test_message("%s", s->str);
1239         g_string_free(s, true);
1240     }
1241     g_assert(qdict_haskey(response, "return"));
1242     qobject_unref(response);
1243 }
1244
1245 bool qtest_big_endian(QTestState *s)
1246 {
1247     return s->big_endian;
1248 }
1249
1250 static bool qtest_check_machine_version(const char *mname, const char *basename,
1251                                         int major, int minor)
1252 {
1253     char *newname;
1254     bool is_equal;
1255
1256     newname = g_strdup_printf("%s-%i.%i", basename, major, minor);
1257     is_equal = g_str_equal(mname, newname);
1258     g_free(newname);
1259
1260     return is_equal;
1261 }
1262
1263 static bool qtest_is_old_versioned_machine(const char *mname)
1264 {
1265     const char *dash = strrchr(mname, '-');
1266     const char *dot = strrchr(mname, '.');
1267     const char *chr;
1268     char *bname;
1269     const int major = QEMU_VERSION_MAJOR;
1270     const int minor = QEMU_VERSION_MINOR;
1271     bool res = false;
1272
1273     if (dash && dot && dot > dash) {
1274         for (chr = dash + 1; *chr; chr++) {
1275             if (!qemu_isdigit(*chr) && *chr != '.') {
1276                 return false;
1277             }
1278         }
1279         /*
1280          * Now check if it is one of the latest versions. Check major + 1
1281          * and minor + 1 versions as well, since they might already exist
1282          * in the development branch.
1283          */
1284         bname = g_strdup(mname);
1285         bname[dash - mname] = 0;
1286         res = !qtest_check_machine_version(mname, bname, major + 1, 0) &&
1287               !qtest_check_machine_version(mname, bname, major, minor + 1) &&
1288               !qtest_check_machine_version(mname, bname, major, minor);
1289         g_free(bname);
1290     }
1291
1292     return res;
1293 }
1294
1295 void qtest_cb_for_every_machine(void (*cb)(const char *machine),
1296                                 bool skip_old_versioned)
1297 {
1298     QDict *response, *minfo;
1299     QList *list;
1300     const QListEntry *p;
1301     QObject *qobj;
1302     QString *qstr;
1303     const char *mname;
1304     QTestState *qts;
1305
1306     qts = qtest_init("-machine none");
1307     response = qtest_qmp(qts, "{ 'execute': 'query-machines' }");
1308     g_assert(response);
1309     list = qdict_get_qlist(response, "return");
1310     g_assert(list);
1311
1312     for (p = qlist_first(list); p; p = qlist_next(p)) {
1313         minfo = qobject_to(QDict, qlist_entry_obj(p));
1314         g_assert(minfo);
1315         qobj = qdict_get(minfo, "name");
1316         g_assert(qobj);
1317         qstr = qobject_to(QString, qobj);
1318         g_assert(qstr);
1319         mname = qstring_get_str(qstr);
1320         /* Ignore machines that cannot be used for qtests */
1321         if (!strncmp("xenfv", mname, 5) || g_str_equal("xenpv", mname)) {
1322             continue;
1323         }
1324         if (!skip_old_versioned || !qtest_is_old_versioned_machine(mname)) {
1325             cb(mname);
1326         }
1327     }
1328
1329     qtest_quit(qts);
1330     qobject_unref(response);
1331 }
1332
1333 /*
1334  * Generic hot-plugging test via the device_add QMP commands.
1335  */
1336 void qtest_qmp_device_add_qdict(QTestState *qts, const char *drv,
1337                                 const QDict *arguments)
1338 {
1339     QDict *resp;
1340     QDict *args = arguments ? qdict_clone_shallow(arguments) : qdict_new();
1341
1342     g_assert(!qdict_haskey(args, "driver"));
1343     qdict_put_str(args, "driver", drv);
1344     resp = qtest_qmp(qts, "{'execute': 'device_add', 'arguments': %p}", args);
1345     g_assert(resp);
1346     g_assert(!qdict_haskey(resp, "event")); /* We don't expect any events */
1347     g_assert(!qdict_haskey(resp, "error"));
1348     qobject_unref(resp);
1349 }
1350
1351 void qtest_qmp_device_add(QTestState *qts, const char *driver, const char *id,
1352                           const char *fmt, ...)
1353 {
1354     QDict *args;
1355     va_list ap;
1356
1357     va_start(ap, fmt);
1358     args = qdict_from_vjsonf_nofail(fmt, ap);
1359     va_end(ap);
1360
1361     g_assert(!qdict_haskey(args, "id"));
1362     qdict_put_str(args, "id", id);
1363
1364     qtest_qmp_device_add_qdict(qts, driver, args);
1365     qobject_unref(args);
1366 }
1367
1368
1369 /*
1370  * Generic hot-unplugging test via the device_del QMP command.
1371  * Device deletion will get one response and one event. For example:
1372  *
1373  * {'execute': 'device_del','arguments': { 'id': 'scsi-hd'}}
1374  *
1375  * will get this one:
1376  *
1377  * {"timestamp": {"seconds": 1505289667, "microseconds": 569862},
1378  *  "event": "DEVICE_DELETED", "data": {"device": "scsi-hd",
1379  *  "path": "/machine/peripheral/scsi-hd"}}
1380  *
1381  * and this one:
1382  *
1383  * {"return": {}}
1384  */
1385 void qtest_qmp_device_del(QTestState *qts, const char *id)
1386 {
1387     QDict *rsp;
1388
1389     rsp = qtest_qmp(qts, "{'execute': 'device_del', 'arguments': {'id': %s}}",
1390                     id);
1391
1392     g_assert(qdict_haskey(rsp, "return"));
1393     qobject_unref(rsp);
1394     qtest_qmp_eventwait(qts, "DEVICE_DELETED");
1395 }
1396
1397 bool qmp_rsp_is_err(QDict *rsp)
1398 {
1399     QDict *error = qdict_get_qdict(rsp, "error");
1400     qobject_unref(rsp);
1401     return !!error;
1402 }
1403
1404 void qmp_expect_error_and_unref(QDict *rsp, const char *class)
1405 {
1406     QDict *error = qdict_get_qdict(rsp, "error");
1407
1408     g_assert_cmpstr(qdict_get_try_str(error, "class"), ==, class);
1409     g_assert_nonnull(qdict_get_try_str(error, "desc"));
1410     g_assert(!qdict_haskey(rsp, "return"));
1411
1412     qobject_unref(rsp);
1413 }
1414
1415 static void qtest_client_set_tx_handler(QTestState *s,
1416                     QTestSendFn send)
1417 {
1418     s->ops.send = send;
1419 }
1420 static void qtest_client_set_rx_handler(QTestState *s, QTestRecvFn recv)
1421 {
1422     s->ops.recv_line = recv;
1423 }
1424 /* A type-safe wrapper for s->send() */
1425 static void send_wrapper(QTestState *s, const char *buf)
1426 {
1427     s->ops.external_send(s, buf);
1428 }
1429
1430 static GString *qtest_client_inproc_recv_line(QTestState *s)
1431 {
1432     GString *line;
1433     size_t offset;
1434     char *eol;
1435
1436     eol = strchr(s->rx->str, '\n');
1437     offset = eol - s->rx->str;
1438     line = g_string_new_len(s->rx->str, offset);
1439     g_string_erase(s->rx, 0, offset + 1);
1440     return line;
1441 }
1442
1443 QTestState *qtest_inproc_init(QTestState **s, bool log, const char* arch,
1444                     void (*send)(void*, const char*))
1445 {
1446     QTestState *qts;
1447     qts = g_new0(QTestState, 1);
1448     qts->pending_events = NULL;
1449     *s = qts; /* Expose qts early on, since the query endianness relies on it */
1450     qts->wstatus = 0;
1451     for (int i = 0; i < MAX_IRQ; i++) {
1452         qts->irq_level[i] = false;
1453     }
1454
1455     qtest_client_set_rx_handler(qts, qtest_client_inproc_recv_line);
1456
1457     /* send() may not have a matching protoype, so use a type-safe wrapper */
1458     qts->ops.external_send = send;
1459     qtest_client_set_tx_handler(qts, send_wrapper);
1460
1461     qts->big_endian = qtest_query_target_endianness(qts);
1462
1463     /*
1464      * Set a dummy path for QTEST_QEMU_BINARY. Doesn't need to exist, but this
1465      * way, qtest_get_arch works for inproc qtest.
1466      */
1467     gchar *bin_path = g_strconcat("/qemu-system-", arch, NULL);
1468     setenv("QTEST_QEMU_BINARY", bin_path, 0);
1469     g_free(bin_path);
1470
1471     return qts;
1472 }
1473
1474 void qtest_client_inproc_recv(void *opaque, const char *str)
1475 {
1476     QTestState *qts = *(QTestState **)opaque;
1477
1478     if (!qts->rx) {
1479         qts->rx = g_string_new(NULL);
1480     }
1481     g_string_append(qts->rx, str);
1482     return;
1483 }