/* * 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 */ 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; } /** * 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 qtest_async_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); } } 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 *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); } } 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)) { 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)) { gchar *path = g_strdup_printf("/%s/%s", qtest_get_arch(), str); g_test_add_data_func(path, data, 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_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); } 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; }