qemu/tests/libqtest.c
Stefan Hajnoczi 0c460dac03 libqtest: add qmp(fmt, ...) -> QDict* function
Add a qtest qmp() function that returns the response object.  This
allows test cases to verify the result or to check for error responses.
It also allows waiting for QMP events.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
2013-11-07 13:58:53 +01:00

589 lines
13 KiB
C

/*
* 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-streamer.h"
#include "qapi/qmp/json-parser.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; /* QEMU PID file */
int child_pid; /* Child process created to execute QEMU */
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, 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 ?: "");
execlp("/bin/sh", "sh", "-c", command, NULL);
exit(1);
}
s->fd = socket_accept(sock);
s->qmp_fd = socket_accept(qmpsock);
s->rx = g_string_new("");
s->pid_file = pid_file;
s->child_pid = pid;
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(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);
}
close(s->fd);
close(s->qmp_fd);
g_string_free(s->rx, true);
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);
g_free(s);
}
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;
}
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_qmpv(QTestState *s, const char *fmt, va_list ap)
{
QMPResponseParser qmp;
/* Send QMP request */
socket_sendf(s->qmp_fd, fmt, ap);
/* Receive reply */
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);
}
json_message_parser_feed(&qmp.parser, &c, 1);
}
json_message_parser_destroy(&qmp.parser);
return qmp.response;
}
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);
}
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);
}