summaryrefslogtreecommitdiff
path: root/tests/libqtest.c
blob: 913fa0535c8c5f79d8dcefb3988b7acbca3b42ab (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
/*
 * QTest
 *
 * Copyright IBM, Corp. 2012
 * Copyright Red Hat, Inc. 2012
 *
 * Authors:
 *  Anthony Liguori   <aliguori@us.ibm.com>
 *  Paolo Bonzini     <pbonzini@redhat.com>
 *
 * 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"

#define MAX_IRQ 256

QTestState *global_qtest;

struct QTestState
{
    int fd;
    int qmp_fd;
    bool irq_level[MAX_IRQ];
    GString *rx;
    gchar *pid_file;
    char *socket_path, *qmp_socket_path;
};

#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);
    listen(sock, 1);

    return sock;
}

static int socket_accept(int sock)
{
    struct sockaddr_un addr;
    socklen_t addrlen;
    int ret;

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

    return ret;
}

static pid_t qtest_qemu_pid(QTestState *s)
{
    FILE *f;
    char buffer[1024];
    pid_t pid = -1;

    f = fopen(s->pid_file, "r");
    if (f) {
        if (fgets(buffer, sizeof(buffer), f)) {
            pid = atoi(buffer);
        }
    }
    fclose(f);
    return pid;
}

QTestState *qtest_init(const char *extra_args)
{
    QTestState *s;
    int sock, qmpsock, ret, i;
    gchar *pid_file;
    gchar *command;
    const char *qemu_binary;
    pid_t pid;

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

    s = g_malloc(sizeof(*s));

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

    sock = init_socket(s->socket_path);
    qmpsock = init_socket(s->qmp_socket_path);

    pid = fork();
    if (pid == 0) {
        command = g_strdup_printf("%s "
                                  "-qtest unix:%s,nowait "
                                  "-qtest-log /dev/null "
                                  "-qmp unix:%s,nowait "
                                  "-pidfile %s "
                                  "-machine accel=qtest "
                                  "%s", qemu_binary, s->socket_path,
                                  s->qmp_socket_path, pid_file,
                                  extra_args ?: "");

        ret = system(command);
        exit(ret);
        g_free(command);
    }

    s->fd = socket_accept(sock);
    s->qmp_fd = socket_accept(qmpsock);

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

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

    if (getenv("QTEST_STOP")) {
        kill(qtest_qemu_pid(s), SIGSTOP);
    }

    return s;
}

void qtest_quit(QTestState *s)
{
    int status;

    pid_t pid = qtest_qemu_pid(s);
    if (pid != -1) {
        kill(pid, SIGTERM);
        waitpid(pid, &status, 0);
    }

    unlink(s->pid_file);
    unlink(s->socket_path);
    unlink(s->qmp_socket_path);
    g_free(s->pid_file);
    g_free(s->socket_path);
    g_free(s->qmp_socket_path);
}

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

    str = g_strdup_vprintf(fmt, ap);
    size = strlen(str);

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

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

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

        offset += len;
    }
}

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;
}

void qtest_qmp(QTestState *s, const char *fmt, ...)
{
    va_list ap;
    bool has_reply = false;
    int nesting = 0;

    /* Send QMP request */
    va_start(ap, fmt);
    socket_sendf(s->qmp_fd, fmt, ap);
    va_end(ap);

    /* Receive reply */
    while (!has_reply || nesting > 0) {
        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);
        }

        switch (c) {
        case '{':
            nesting++;
            has_reply = true;
            break;
        case '}':
            nesting--;
            break;
        }
    }
}

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 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);
}

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);
}