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qemu-e2k/tests/libqtest.c

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/*
* 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 5
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 */
};
static GHookList abrt_hooks;
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 kill_qemu_hook_func(void *s)
{
kill_qemu(s);
}
static void sigabrt_handler(int signo)
{
g_hook_list_invoke(&abrt_hooks, FALSE);
}
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);
}
void qtest_add_abrt_handler(GHookFunc fn, const void *data)
{
GHook *hook;
/* Only install SIGABRT handler once */
if (!abrt_hooks.is_setup) {
g_hook_list_init(&abrt_hooks, sizeof(GHook));
setup_sigabrt_handler();
}
hook = g_hook_alloc(&abrt_hooks);
hook->func = fn;
hook->data = (void *)data;
g_hook_prepend(&abrt_hooks, hook);
}
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);
qtest_add_abrt_handler(kill_qemu_hook_func, 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)
{
qtest_instances = g_list_remove(qtest_instances, s);
g_hook_destroy_link(&abrt_hooks, g_hook_find_data(&abrt_hooks, TRUE, s));
/* Uninstall SIGABRT handler on last instance */
if (!qtest_instances) {
cleanup_sigabrt_handler();
}
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, GQueue *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 *qmp_fd_receive(int fd)
{
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(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_qmp_receive(QTestState *s)
{
return qmp_fd_receive(s->qmp_fd);
}
/**
* Allow users to send a message without waiting for the reply,
* in the case that they choose to discard all replies up until
* a particular EVENT is received.
*/
void qmp_fd_sendv(int fd, 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(fd, str, size);
QDECREF(qstr);
qobject_decref(qobj);
}
}
void qtest_async_qmpv(QTestState *s, const char *fmt, va_list ap)
{
qmp_fd_sendv(s->qmp_fd, fmt, ap);
}
QDict *qmp_fdv(int fd, const char *fmt, va_list ap)
{
qmp_fd_sendv(fd, fmt, ap);
return qmp_fd_receive(fd);
}
QDict *qtest_qmpv(QTestState *s, const char *fmt, va_list ap)
{
qtest_async_qmpv(s, fmt, ap);
/* Receive reply */
return qtest_qmp_receive(s);
}
QDict *qmp_fd(int fd, const char *fmt, ...)
{
va_list ap;
QDict *response;
va_start(ap, fmt);
response = qmp_fdv(fd, fmt, ap);
va_end(ap);
return response;
}
void qmp_fd_send(int fd, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
qmp_fd_sendv(fd, fmt, ap);
va_end(ap);
}
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_async_qmp(QTestState *s, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
qtest_async_qmpv(s, fmt, ap);
va_end(ap);
}
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);
}
void qtest_qmp_eventwait(QTestState *s, const char *event)
{
QDict *response;
for (;;) {
response = qtest_qmp_receive(s);
if ((qdict_haskey(response, "event")) &&
(strcmp(qdict_get_str(response, "event"), event) == 0)) {
QDECREF(response);
break;
}
QDECREF(response);
}
}
char *qtest_hmpv(QTestState *s, const char *fmt, va_list ap)
{
char *cmd;
QDict *resp;
char *ret;
cmd = g_strdup_vprintf(fmt, ap);
resp = qtest_qmp(s, "{'execute': 'human-monitor-command',"
" 'arguments': {'command-line': %s}}",
cmd);
ret = g_strdup(qdict_get_try_str(resp, "return"));
g_assert(ret);
QDECREF(resp);
g_free(cmd);
return ret;
}
char *qtest_hmp(QTestState *s, const char *fmt, ...)
{
va_list ap;
char *ret;
va_start(ap, fmt);
ret = qtest_hmpv(s, fmt, ap);
va_end(ap);
return ret;
}
const char *qtest_get_arch(void)
{
const char *qemu = getenv("QTEST_QEMU_BINARY");
g_assert(qemu != NULL);
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)(void))
{
gchar *path = g_strdup_printf("/%s/%s", qtest_get_arch(), str);
g_test_add_func(path, fn);
g_free(path);
}
void qtest_add_data_func(const char *str, const void *data,
void (*fn)(const void *))
{
gchar *path = g_strdup_printf("/%s/%s", qtest_get_arch(), str);
g_test_add_data_func(path, data, fn);
g_free(path);
}
void qtest_bufwrite(QTestState *s, uint64_t addr, const void *data, size_t size)
{
gchar *bdata;
bdata = g_base64_encode(data, size);
qtest_sendf(s, "b64write 0x%" PRIx64 " 0x%zx ", addr, size);
socket_send(s->fd, bdata, strlen(bdata));
socket_send(s->fd, "\n", 1);
qtest_rsp(s, 0);
g_free(bdata);
}
void qtest_bufread(QTestState *s, uint64_t addr, void *data, size_t size)
{
gchar **args;
size_t len;
qtest_sendf(s, "b64read 0x%" PRIx64 " 0x%zx\n", addr, size);
args = qtest_rsp(s, 2);
g_base64_decode_inplace(args[1], &len);
if (size != len) {
fprintf(stderr, "bufread: asked for %zu bytes but decoded %zu\n",
size, len);
len = MIN(len, size);
}
memcpy(data, args[1], len);
g_strfreev(args);
}
void qtest_memwrite(QTestState *s, uint64_t addr, const void *data, size_t size)
{
const uint8_t *ptr = data;
size_t i;
char *enc = g_malloc(2 * size + 1);
for (i = 0; i < size; i++) {
sprintf(&enc[i * 2], "%02x", ptr[i]);
}
qtest_sendf(s, "write 0x%" PRIx64 " 0x%zx 0x%s\n", addr, size, enc);
qtest_rsp(s, 0);
g_free(enc);
}
void qtest_memset(QTestState *s, uint64_t addr, uint8_t pattern, size_t size)
{
qtest_sendf(s, "memset 0x%" PRIx64 " 0x%zx 0x%02x\n", addr, size, pattern);
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_async(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
qtest_async_qmpv(global_qtest, fmt, ap);
va_end(ap);
}
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);
}
char *hmp(const char *fmt, ...)
{
va_list ap;
char *ret;
va_start(ap, fmt);
ret = qtest_hmpv(global_qtest, fmt, ap);
va_end(ap);
return ret;
}
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;
}
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