summaryrefslogtreecommitdiff
path: root/tests/libqtest.c
blob: 81ade4e360cfd0d968af357582a24263893b09e1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
/*
 * QTest
 *
 * Copyright IBM, Corp. 2012
 * Copyright Red Hat, Inc. 2012
 * Copyright SUSE LINUX Products GmbH 2013
 *
 * Authors:
 *  Anthony Liguori   <aliguori@us.ibm.com>
 *  Paolo Bonzini     <pbonzini@redhat.com>
 *  Andreas Färber    <afaerber@suse.de>
 *
 * This work is licensed under the terms of the GNU GPL, version 2 or later.
 * See the COPYING file in the top-level directory.
 *
 */
#include "libqtest.h"

#include <glib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <sys/un.h>
#include <inttypes.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>

#include "qemu/compiler.h"
#include "qemu/osdep.h"
#include "qapi/qmp/json-parser.h"
#include "qapi/qmp/json-streamer.h"
#include "qapi/qmp/qjson.h"

#define MAX_IRQ 256
#define SOCKET_TIMEOUT 15

QTestState *global_qtest;

struct QTestState
{
    int fd;
    int qmp_fd;
    bool irq_level[MAX_IRQ];
    GString *rx;
    pid_t qemu_pid;  /* our child QEMU process */
    struct sigaction sigact_old; /* restored on exit */
};

static GList *qtest_instances;
static struct sigaction sigact_old;

#define g_assert_no_errno(ret) do { \
    g_assert_cmpint(ret, !=, -1); \
} while (0)

static int init_socket(const char *socket_path)
{
    struct sockaddr_un addr;
    int sock;
    int ret;

    sock = socket(PF_UNIX, SOCK_STREAM, 0);
    g_assert_no_errno(sock);

    addr.sun_family = AF_UNIX;
    snprintf(addr.sun_path, sizeof(addr.sun_path), "%s", socket_path);
    qemu_set_cloexec(sock);

    do {
        ret = bind(sock, (struct sockaddr *)&addr, sizeof(addr));
    } while (ret == -1 && errno == EINTR);
    g_assert_no_errno(ret);
    ret = listen(sock, 1);
    g_assert_no_errno(ret);

    return sock;
}

static int socket_accept(int sock)
{
    struct sockaddr_un addr;
    socklen_t addrlen;
    int ret;
    struct timeval timeout = { .tv_sec = SOCKET_TIMEOUT,
                               .tv_usec = 0 };

    setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, (void *)&timeout,
               sizeof(timeout));

    do {
        addrlen = sizeof(addr);
        ret = accept(sock, (struct sockaddr *)&addr, &addrlen);
    } while (ret == -1 && errno == EINTR);
    if (ret == -1) {
        fprintf(stderr, "%s failed: %s\n", __func__, strerror(errno));
    }
    close(sock);

    return ret;
}

static void kill_qemu(QTestState *s)
{
    if (s->qemu_pid != -1) {
        kill(s->qemu_pid, SIGTERM);
        waitpid(s->qemu_pid, NULL, 0);
    }
}

static void sigabrt_handler(int signo)
{
    GList *elem;
    for (elem = qtest_instances; elem; elem = elem->next) {
        kill_qemu(elem->data);
    }
}

static void setup_sigabrt_handler(void)
{
    struct sigaction sigact;

    /* Catch SIGABRT to clean up on g_assert() failure */
    sigact = (struct sigaction){
        .sa_handler = sigabrt_handler,
        .sa_flags = SA_RESETHAND,
    };
    sigemptyset(&sigact.sa_mask);
    sigaction(SIGABRT, &sigact, &sigact_old);
}

static void cleanup_sigabrt_handler(void)
{
    sigaction(SIGABRT, &sigact_old, NULL);
}

QTestState *qtest_init(const char *extra_args)
{
    QTestState *s;
    int sock, qmpsock, i;
    gchar *socket_path;
    gchar *qmp_socket_path;
    gchar *command;
    const char *qemu_binary;

    qemu_binary = getenv("QTEST_QEMU_BINARY");
    g_assert(qemu_binary != NULL);

    s = g_malloc(sizeof(*s));

    socket_path = g_strdup_printf("/tmp/qtest-%d.sock", getpid());
    qmp_socket_path = g_strdup_printf("/tmp/qtest-%d.qmp", getpid());

    sock = init_socket(socket_path);
    qmpsock = init_socket(qmp_socket_path);

    /* Only install SIGABRT handler once */
    if (!qtest_instances) {
        setup_sigabrt_handler();
    }

    qtest_instances = g_list_prepend(qtest_instances, s);

    s->qemu_pid = fork();
    if (s->qemu_pid == 0) {
        setenv("QEMU_AUDIO_DRV", "none", true);
        command = g_strdup_printf("exec %s "
                                  "-qtest unix:%s,nowait "
                                  "-qtest-log %s "
                                  "-qmp unix:%s,nowait "
                                  "-machine accel=qtest "
                                  "-display none "
                                  "%s", qemu_binary, socket_path,
                                  getenv("QTEST_LOG") ? "/dev/fd/2" : "/dev/null",
                                  qmp_socket_path,
                                  extra_args ?: "");
        execlp("/bin/sh", "sh", "-c", command, NULL);
        exit(1);
    }

    s->fd = socket_accept(sock);
    if (s->fd >= 0) {
        s->qmp_fd = socket_accept(qmpsock);
    }
    unlink(socket_path);
    unlink(qmp_socket_path);
    g_free(socket_path);
    g_free(qmp_socket_path);

    g_assert(s->fd >= 0 && s->qmp_fd >= 0);

    s->rx = g_string_new("");
    for (i = 0; i < MAX_IRQ; i++) {
        s->irq_level[i] = false;
    }

    /* Read the QMP greeting and then do the handshake */
    qtest_qmp_discard_response(s, "");
    qtest_qmp_discard_response(s, "{ 'execute': 'qmp_capabilities' }");

    if (getenv("QTEST_STOP")) {
        kill(s->qemu_pid, SIGSTOP);
    }

    return s;
}

void qtest_quit(QTestState *s)
{
    /* Uninstall SIGABRT handler on last instance */
    if (qtest_instances && !qtest_instances->next) {
        cleanup_sigabrt_handler();
    }

    qtest_instances = g_list_remove(qtest_instances, s);

    kill_qemu(s);
    close(s->fd);
    close(s->qmp_fd);
    g_string_free(s->rx, true);
    g_free(s);
}

static void socket_send(int fd, const char *buf, size_t size)
{
    size_t offset;

    offset = 0;
    while (offset < size) {
        ssize_t len;

        len = write(fd, buf + offset, size - offset);
        if (len == -1 && errno == EINTR) {
            continue;
        }

        g_assert_no_errno(len);
        g_assert_cmpint(len, >, 0);

        offset += len;
    }
}

static void socket_sendf(int fd, const char *fmt, va_list ap)
{
    gchar *str = g_strdup_vprintf(fmt, ap);
    size_t size = strlen(str);

    socket_send(fd, str, size);
    g_free(str);
}

static void GCC_FMT_ATTR(2, 3) qtest_sendf(QTestState *s, const char *fmt, ...)
{
    va_list ap;

    va_start(ap, fmt);
    socket_sendf(s->fd, fmt, ap);
    va_end(ap);
}

static GString *qtest_recv_line(QTestState *s)
{
    GString *line;
    size_t offset;
    char *eol;

    while ((eol = strchr(s->rx->str, '\n')) == NULL) {
        ssize_t len;
        char buffer[1024];

        len = read(s->fd, buffer, sizeof(buffer));
        if (len == -1 && errno == EINTR) {
            continue;
        }

        if (len == -1 || len == 0) {
            fprintf(stderr, "Broken pipe\n");
            exit(1);
        }

        g_string_append_len(s->rx, buffer, len);
    }

    offset = eol - s->rx->str;
    line = g_string_new_len(s->rx->str, offset);
    g_string_erase(s->rx, 0, offset + 1);

    return line;
}

static gchar **qtest_rsp(QTestState *s, int expected_args)
{
    GString *line;
    gchar **words;
    int i;

redo:
    line = qtest_recv_line(s);
    words = g_strsplit(line->str, " ", 0);
    g_string_free(line, TRUE);

    if (strcmp(words[0], "IRQ") == 0) {
        int irq;

        g_assert(words[1] != NULL);
        g_assert(words[2] != NULL);

        irq = strtoul(words[2], NULL, 0);
        g_assert_cmpint(irq, >=, 0);
        g_assert_cmpint(irq, <, MAX_IRQ);

        if (strcmp(words[1], "raise") == 0) {
            s->irq_level[irq] = true;
        } else {
            s->irq_level[irq] = false;
        }

        g_strfreev(words);
        goto redo;
    }

    g_assert(words[0] != NULL);
    g_assert_cmpstr(words[0], ==, "OK");

    if (expected_args) {
        for (i = 0; i < expected_args; i++) {
            g_assert(words[i] != NULL);
        }
    } else {
        g_strfreev(words);
    }

    return words;
}

typedef struct {
    JSONMessageParser parser;
    QDict *response;
} QMPResponseParser;

static void qmp_response(JSONMessageParser *parser, QList *tokens)
{
    QMPResponseParser *qmp = container_of(parser, QMPResponseParser, parser);
    QObject *obj;

    obj = json_parser_parse(tokens, NULL);
    if (!obj) {
        fprintf(stderr, "QMP JSON response parsing failed\n");
        exit(1);
    }

    g_assert(qobject_type(obj) == QTYPE_QDICT);
    g_assert(!qmp->response);
    qmp->response = (QDict *)obj;
}

QDict *qtest_qmp_receive(QTestState *s)
{
    QMPResponseParser qmp;
    bool log = getenv("QTEST_LOG") != NULL;

    qmp.response = NULL;
    json_message_parser_init(&qmp.parser, qmp_response);
    while (!qmp.response) {
        ssize_t len;
        char c;

        len = read(s->qmp_fd, &c, 1);
        if (len == -1 && errno == EINTR) {
            continue;
        }

        if (len == -1 || len == 0) {
            fprintf(stderr, "Broken pipe\n");
            exit(1);
        }

        if (log) {
            len = write(2, &c, 1);
        }
        json_message_parser_feed(&qmp.parser, &c, 1);
    }
    json_message_parser_destroy(&qmp.parser);

    return qmp.response;
}

QDict *qtest_qmpv(QTestState *s, const char *fmt, va_list ap)
{
    va_list ap_copy;
    QObject *qobj;

    /* Going through qobject ensures we escape strings properly.
     * This seemingly unnecessary copy is required in case va_list
     * is an array type.
     */
    va_copy(ap_copy, ap);
    qobj = qobject_from_jsonv(fmt, &ap_copy);
    va_end(ap_copy);

    /* No need to send anything for an empty QObject.  */
    if (qobj) {
        int log = getenv("QTEST_LOG") != NULL;
        QString *qstr = qobject_to_json(qobj);
        const char *str = qstring_get_str(qstr);
        size_t size = qstring_get_length(qstr);

        if (log) {
            fprintf(stderr, "%s", str);
        }
        /* Send QMP request */
        socket_send(s->qmp_fd, str, size);

        QDECREF(qstr);
        qobject_decref(qobj);
    }

    /* Receive reply */
    return qtest_qmp_receive(s);
}

QDict *qtest_qmp(QTestState *s, const char *fmt, ...)
{
    va_list ap;
    QDict *response;

    va_start(ap, fmt);
    response = qtest_qmpv(s, fmt, ap);
    va_end(ap);
    return response;
}

void qtest_qmpv_discard_response(QTestState *s, const char *fmt, va_list ap)
{
    QDict *response = qtest_qmpv(s, fmt, ap);
    QDECREF(response);
}

void qtest_qmp_discard_response(QTestState *s, const char *fmt, ...)
{
    va_list ap;
    QDict *response;

    va_start(ap, fmt);
    response = qtest_qmpv(s, fmt, ap);
    va_end(ap);
    QDECREF(response);
}

const char *qtest_get_arch(void)
{
    const char *qemu = getenv("QTEST_QEMU_BINARY");
    const char *end = strrchr(qemu, '/');

    return end + strlen("/qemu-system-");
}

bool qtest_get_irq(QTestState *s, int num)
{
    /* dummy operation in order to make sure irq is up to date */
    qtest_inb(s, 0);

    return s->irq_level[num];
}

static int64_t qtest_clock_rsp(QTestState *s)
{
    gchar **words;
    int64_t clock;
    words = qtest_rsp(s, 2);
    clock = g_ascii_strtoll(words[1], NULL, 0);
    g_strfreev(words);
    return clock;
}

int64_t qtest_clock_step_next(QTestState *s)
{
    qtest_sendf(s, "clock_step\n");
    return qtest_clock_rsp(s);
}

int64_t qtest_clock_step(QTestState *s, int64_t step)
{
    qtest_sendf(s, "clock_step %"PRIi64"\n", step);
    return qtest_clock_rsp(s);
}

int64_t qtest_clock_set(QTestState *s, int64_t val)
{
    qtest_sendf(s, "clock_set %"PRIi64"\n", val);
    return qtest_clock_rsp(s);
}

void qtest_irq_intercept_out(QTestState *s, const char *qom_path)
{
    qtest_sendf(s, "irq_intercept_out %s\n", qom_path);
    qtest_rsp(s, 0);
}

void qtest_irq_intercept_in(QTestState *s, const char *qom_path)
{
    qtest_sendf(s, "irq_intercept_in %s\n", qom_path);
    qtest_rsp(s, 0);
}

static void qtest_out(QTestState *s, const char *cmd, uint16_t addr, uint32_t value)
{
    qtest_sendf(s, "%s 0x%x 0x%x\n", cmd, addr, value);
    qtest_rsp(s, 0);
}

void qtest_outb(QTestState *s, uint16_t addr, uint8_t value)
{
    qtest_out(s, "outb", addr, value);
}

void qtest_outw(QTestState *s, uint16_t addr, uint16_t value)
{
    qtest_out(s, "outw", addr, value);
}

void qtest_outl(QTestState *s, uint16_t addr, uint32_t value)
{
    qtest_out(s, "outl", addr, value);
}

static uint32_t qtest_in(QTestState *s, const char *cmd, uint16_t addr)
{
    gchar **args;
    uint32_t value;

    qtest_sendf(s, "%s 0x%x\n", cmd, addr);
    args = qtest_rsp(s, 2);
    value = strtoul(args[1], NULL, 0);
    g_strfreev(args);

    return value;
}

uint8_t qtest_inb(QTestState *s, uint16_t addr)
{
    return qtest_in(s, "inb", addr);
}

uint16_t qtest_inw(QTestState *s, uint16_t addr)
{
    return qtest_in(s, "inw", addr);
}

uint32_t qtest_inl(QTestState *s, uint16_t addr)
{
    return qtest_in(s, "inl", addr);
}

static void qtest_write(QTestState *s, const char *cmd, uint64_t addr,
                        uint64_t value)
{
    qtest_sendf(s, "%s 0x%" PRIx64 " 0x%" PRIx64 "\n", cmd, addr, value);
    qtest_rsp(s, 0);
}

void qtest_writeb(QTestState *s, uint64_t addr, uint8_t value)
{
    qtest_write(s, "writeb", addr, value);
}

void qtest_writew(QTestState *s, uint64_t addr, uint16_t value)
{
    qtest_write(s, "writew", addr, value);
}

void qtest_writel(QTestState *s, uint64_t addr, uint32_t value)
{
    qtest_write(s, "writel", addr, value);
}

void qtest_writeq(QTestState *s, uint64_t addr, uint64_t value)
{
    qtest_write(s, "writeq", addr, value);
}

static uint64_t qtest_read(QTestState *s, const char *cmd, uint64_t addr)
{
    gchar **args;
    uint64_t value;

    qtest_sendf(s, "%s 0x%" PRIx64 "\n", cmd, addr);
    args = qtest_rsp(s, 2);
    value = strtoull(args[1], NULL, 0);
    g_strfreev(args);

    return value;
}

uint8_t qtest_readb(QTestState *s, uint64_t addr)
{
    return qtest_read(s, "readb", addr);
}

uint16_t qtest_readw(QTestState *s, uint64_t addr)
{
    return qtest_read(s, "readw", addr);
}

uint32_t qtest_readl(QTestState *s, uint64_t addr)
{
    return qtest_read(s, "readl", addr);
}

uint64_t qtest_readq(QTestState *s, uint64_t addr)
{
    return qtest_read(s, "readq", addr);
}

static int hex2nib(char ch)
{
    if (ch >= '0' && ch <= '9') {
        return ch - '0';
    } else if (ch >= 'a' && ch <= 'f') {
        return 10 + (ch - 'a');
    } else if (ch >= 'A' && ch <= 'F') {
        return 10 + (ch - 'a');
    } else {
        return -1;
    }
}

void qtest_memread(QTestState *s, uint64_t addr, void *data, size_t size)
{
    uint8_t *ptr = data;
    gchar **args;
    size_t i;

    qtest_sendf(s, "read 0x%" PRIx64 " 0x%zx\n", addr, size);
    args = qtest_rsp(s, 2);

    for (i = 0; i < size; i++) {
        ptr[i] = hex2nib(args[1][2 + (i * 2)]) << 4;
        ptr[i] |= hex2nib(args[1][2 + (i * 2) + 1]);
    }

    g_strfreev(args);
}

void qtest_add_func(const char *str, void (*fn))
{
    gchar *path = g_strdup_printf("/%s/%s", qtest_get_arch(), str);
    g_test_add_func(path, fn);
    g_free(path);
}

void qtest_memwrite(QTestState *s, uint64_t addr, const void *data, size_t size)
{
    const uint8_t *ptr = data;
    size_t i;

    qtest_sendf(s, "write 0x%" PRIx64 " 0x%zx 0x", addr, size);
    for (i = 0; i < size; i++) {
        qtest_sendf(s, "%02x", ptr[i]);
    }
    qtest_sendf(s, "\n");
    qtest_rsp(s, 0);
}

void qtest_memset(QTestState *s, uint64_t addr, uint8_t pattern, size_t size)
{
    size_t i;

    qtest_sendf(s, "write 0x%" PRIx64 " 0x%zx 0x", addr, size);
    for (i = 0; i < size; i++) {
        qtest_sendf(s, "%02x", pattern);
    }
    qtest_sendf(s, "\n");
    qtest_rsp(s, 0);
}

QDict *qmp(const char *fmt, ...)
{
    va_list ap;
    QDict *response;

    va_start(ap, fmt);
    response = qtest_qmpv(global_qtest, fmt, ap);
    va_end(ap);
    return response;
}

void qmp_discard_response(const char *fmt, ...)
{
    va_list ap;

    va_start(ap, fmt);
    qtest_qmpv_discard_response(global_qtest, fmt, ap);
    va_end(ap);
}

bool qtest_big_endian(void)
{
    const char *arch = qtest_get_arch();
    int i;

    static const struct {
        const char *arch;
        bool big_endian;
    } endianness[] = {
        { "aarch64", false },
        { "alpha", false },
        { "arm", false },
        { "cris", false },
        { "i386", false },
        { "lm32", true },
        { "m68k", true },
        { "microblaze", true },
        { "microblazeel", false },
        { "mips", true },
        { "mips64", true },
        { "mips64el", false },
        { "mipsel", false },
        { "moxie", true },
        { "or32", true },
        { "ppc", true },
        { "ppc64", true },
        { "ppcemb", true },
        { "s390x", true },
        { "sh4", false },
        { "sh4eb", true },
        { "sparc", true },
        { "sparc64", true },
        { "unicore32", false },
        { "x86_64", false },
        { "xtensa", false },
        { "xtensaeb", true },
        {},
    };

    for (i = 0; endianness[i].arch; i++) {
        if (strcmp(endianness[i].arch, arch) == 0) {
            return endianness[i].big_endian;
        }
    }

    return false;
}