qtest: add C version of test infrastructure

This also includes a qtest wrapper script to make it easier to launch qtest
tests directly.
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

osdep.h

@@ -140,4 +140,6 @@ static inline void qemu_timersub(const struct timeval *val1,
 #define qemu_timersub timersub
 #endif
 
+void qemu_set_cloexec(int fd);
+
 #endif

qemu-common.h

@@ -190,7 +190,6 @@ ssize_t qemu_send_full(int fd, const void *buf, size_t count, int flags)
     QEMU_WARN_UNUSED_RESULT;
 ssize_t qemu_recv_full(int fd, void *buf, size_t count, int flags)
     QEMU_WARN_UNUSED_RESULT;
-void qemu_set_cloexec(int fd);
 
 #ifndef _WIN32
 int qemu_eventfd(int pipefd[2]);

tests/Makefile

@@ -58,11 +58,22 @@ tests/test-qmp-input-visitor$(EXESUF): tests/test-qmp-input-visitor.o $(test-qap
 tests/test-qmp-input-strict$(EXESUF): tests/test-qmp-input-strict.o $(test-qapi-obj-y)
 tests/test-qmp-commands$(EXESUF): tests/test-qmp-commands.o tests/test-qmp-marshal.o $(test-qapi-obj-y)
 
+# QTest rules
+
+TARGETS=$(patsubst %-softmmu,%, $(filter %-softmmu,$(TARGET_DIRS)))
+QTEST_TARGETS=$(foreach TARGET,$(TARGETS), $(if $(check-qtest-$(TARGET)-y), $(TARGET),))
+check-qtest-$(CONFIG_POSIX)=$(foreach TARGET,$(TARGETS), $(check-qtest-$(TARGET)-y))
+
+qtest-obj-y = tests/libqtest.o $(oslib-obj-y)
+$(check-qtest-y): $(qtest-obj-y)
+
 .PHONY: check-help
 check-help:
 	@echo "Regression testing targets:"
 	@echo
 	@echo " make check                Run all tests"
+	@echo " make check-qtest-TARGET   Run qtest tests for given target"
+	@echo " make check-qtest          Run qtest tests"
 	@echo " make check-unit           Run qobject tests"
 	@echo " make check-block          Run block tests"
 	@echo " make check-report.html    Generates an HTML test report"
@@ -81,18 +92,27 @@ GTESTER_OPTIONS = -k $(if $(V),--verbose,-q)
 
 # gtester tests, possibly with verbose output
 
+.PHONY: $(patsubst %, check-qtest-%, $(QTEST_TARGETS))
+$(patsubst %, check-qtest-%, $(QTEST_TARGETS)): check-qtest-%: $(check-qtest-y)
+	$(call quiet-command,QTEST_QEMU_BINARY=$*-softmmu/qemu-system-$* \
+		gtester $(GTESTER_OPTIONS) -m=$(SPEED) $(check-qtest-$*-y),"GTESTER $@")
+
 .PHONY: $(patsubst %, check-%, $(check-unit-y))
 $(patsubst %, check-%, $(check-unit-y)): check-%: %
 	$(call quiet-command,gtester $(GTESTER_OPTIONS) -m=$(SPEED) $*,"GTESTER $*")
 
 # gtester tests with XML output
 
+$(patsubst %, check-report-qtest-%.xml, $(QTEST_TARGETS)): check-report-qtest-%.xml: $(check-qtest-y)
+	$(call quiet-command,QTEST_QEMU_BINARY=$*-softmmu/qemu-system-$* \
+	  gtester -q $(GTESTER_OPTIONS) -o $@ -m=$(SPEED) $(check-qtest-$*-y),"GTESTER $@")
+
 check-report-unit.xml: $(check-unit-y)
 	$(call quiet-command,gtester -q $(GTESTER_OPTIONS) -o $@ -m=$(SPEED) $^, "GTESTER $@")
 
 # Reports and overall runs
 
-check-report.xml: check-report-unit.xml
+check-report.xml: $(patsubst %,check-report-qtest-%.xml, $(QTEST_TARGETS)) check-report-unit.xml
 	$(call quiet-command,$(SRC_PATH)/scripts/gtester-cat $^ > $@, "  GEN    $@")
 
 check-report.html: check-report.xml
@@ -107,7 +127,8 @@ check-tests/qemu-iotests-quick.sh: tests/qemu-iotests-quick.sh qemu-img$(EXESUF)
 
 # Consolidated targets
 
-.PHONY: check-unit check
+.PHONY: check-qtest check-unit check
+check-qtest: $(patsubst %,check-qtest-%, $(QTEST_TARGETS))
 check-unit: $(patsubst %,check-%, $(check-unit-y))
 check-block: $(patsubst %,check-%, $(check-block-y))
-check: check-unit
+check: check-unit check-qtest

tests/libqtest.c

+/*
+ * 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 "osdep.h"
+
+#define MAX_IRQ 256
+
+QTestState *global_qtest;
+
+struct QTestState
+{
+    int fd;
+    bool irq_level[MAX_IRQ];
+    GString *rx;
+    gchar *pid_file;
+};
+
+#define g_assert_no_errno(ret) do { \
+    g_assert_cmpint(ret, !=, -1); \
+} while (0)
+
+QTestState *qtest_init(const char *extra_args)
+{
+    QTestState *s;
+    struct sockaddr_un addr;
+    int sock, ret, i;
+    gchar *socket_path;
+    gchar *pid_file;
+    gchar *command;
+    const char *qemu_binary;
+    pid_t pid;
+    socklen_t addrlen;
+
+    qemu_binary = getenv("QTEST_QEMU_BINARY");
+    g_assert(qemu_binary != NULL);
+
+    socket_path = g_strdup_printf("/tmp/qtest-%d.sock", getpid());
+    pid_file = g_strdup_printf("/tmp/qtest-%d.pid", getpid());
+
+    s = g_malloc(sizeof(*s));
+
+    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);
+
+    pid = fork();
+    if (pid == 0) {
+        command = g_strdup_printf("%s "
+                                  "-qtest unix:%s,nowait "
+                                  "-qtest-log /dev/null "
+                                  "-pidfile %s "
+                                  "-machine accel=qtest "
+                                  "%s", qemu_binary, socket_path,
+                                  pid_file,
+                                  extra_args ?: "");
+
+        ret = system(command);
+        exit(ret);
+        g_free(command);
+    }
+
+    do {
+        ret = accept(sock, (struct sockaddr *)&addr, &addrlen);
+    } while (ret == -1 && errno == EINTR);
+    g_assert_no_errno(ret);
+    close(sock);
+
+    s->fd = ret;
+    s->rx = g_string_new("");
+    s->pid_file = pid_file;
+    for (i = 0; i < MAX_IRQ; i++) {
+        s->irq_level[i] = false;
+    }
+
+    g_free(socket_path);
+
+    return s;
+}
+
+void qtest_quit(QTestState *s)
+{
+    FILE *f;
+    char buffer[1024];
+
+    f = fopen(s->pid_file, "r");
+    if (f) {
+        if (fgets(buffer, sizeof(buffer), f)) {
+            pid_t pid = atoi(buffer);
+            int status = 0;
+
+            kill(pid, SIGTERM);
+            waitpid(pid, &status, 0);
+        }
+
+        fclose(f);
+    }
+}
+
+static void qtest_sendf(QTestState *s, const char *fmt, ...)
+{
+    va_list ap;
+    gchar *str;
+    size_t size, offset;
+
+    va_start(ap, fmt);
+    str = g_strdup_vprintf(fmt, ap);
+    va_end(ap);
+    size = strlen(str);
+
+    offset = 0;
+    while (offset < size) {
+        ssize_t len;
+
+        len = write(s->fd, str + offset, size - offset);
+        if (len == -1 && errno == EINTR) {
+            continue;
+        }
+
+        g_assert_no_errno(len);
+        g_assert_cmpint(len, >, 0);
+
+        offset += len;
+    }
+}
+
+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;
+}
+
+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%x 0x%x\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%x 0x%x 0x", addr, size);
+    for (i = 0; i < size; i++) {
+        qtest_sendf(s, "%02x", ptr[i]);
+    }
+    qtest_sendf(s, "\n");
+    qtest_rsp(s, 0);
+}

tests/libqtest.h

+/*
+ * 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.
+ *
+ */
+#ifndef LIBQTEST_H
+#define LIBQTEST_H
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <sys/types.h>
+
+typedef struct QTestState QTestState;
+
+extern QTestState *global_qtest;
+
+/**
+ * qtest_init:
+ * @extra_args: other arguments to pass to QEMU.
+ */
+QTestState *qtest_init(const char *extra_args);
+
+/**
+ * qtest_quit:
+ * @s: QTestState instance to operate on.
+ *
+ * Shut down the QEMU process associated to @s.
+ */
+void qtest_quit(QTestState *s);
+
+/**
+ * qtest_get_irq:
+ * @s: QTestState instance to operate on.
+ * @num: Interrupt to observe.
+ *
+ * Return the level of the @num interrupt.
+ */
+bool qtest_get_irq(QTestState *s, int num);
+
+/**
+ * qtest_irq_intercept_in:
+ * @s: QTestState instance to operate on.
+ * @string: QOM path of a device.
+ *
+ * Associate qtest irqs with the GPIO-in pins of the device
+ * whose path is specified by @string.
+ */
+void qtest_irq_intercept_in(QTestState *s, const char *string);
+
+/**
+ * qtest_irq_intercept_out:
+ * @s: QTestState instance to operate on.
+ * @string: QOM path of a device.
+ *
+ * Associate qtest irqs with the GPIO-out pins of the device
+ * whose path is specified by @string.
+ */
+void qtest_irq_intercept_out(QTestState *s, const char *string);
+
+/**
+ * qtest_outb:
+ * @s: QTestState instance to operate on.
+ * @addr: I/O port to write to.
+ * @value: Value being written.
+ *
+ * Write an 8-bit value to an I/O port.
+ */
+void qtest_outb(QTestState *s, uint16_t addr, uint8_t value);
+
+/**
+ * qtest_outw:
+ * @s: QTestState instance to operate on.
+ * @addr: I/O port to write to.
+ * @value: Value being written.
+ *
+ * Write a 16-bit value to an I/O port.
+ */
+void qtest_outw(QTestState *s, uint16_t addr, uint16_t value);
+
+/**
+ * qtest_outl:
+ * @s: QTestState instance to operate on.
+ * @addr: I/O port to write to.
+ * @value: Value being written.
+ *
+ * Write a 32-bit value to an I/O port.
+ */
+void qtest_outl(QTestState *s, uint16_t addr, uint32_t value);
+
+/**
+ * qtest_inb:
+ * @s: QTestState instance to operate on.
+ * @addr: I/O port to read from.
+ * @value: Value being written.
+ *
+ * Returns an 8-bit value from an I/O port.
+ */
+uint8_t qtest_inb(QTestState *s, uint16_t addr);
+
+/**
+ * qtest_inw:
+ * @s: QTestState instance to operate on.
+ * @addr: I/O port to read from.
+ * @value: Value being written.
+ *
+ * Returns a 16-bit value from an I/O port.
+ */
+uint16_t qtest_inw(QTestState *s, uint16_t addr);
+
+/**
+ * qtest_inl:
+ * @s: QTestState instance to operate on.
+ * @addr: I/O port to read from.
+ * @value: Value being written.
+ *
+ * Returns a 32-bit value from an I/O port.
+ */
+uint32_t qtest_inl(QTestState *s, uint16_t addr);
+
+/**
+ * qtest_memread:
+ * @s: QTestState instance to operate on.
+ * @addr: Guest address to read from.
+ * @data: Pointer to where memory contents will be stored.
+ * @size: Number of bytes to read.
+ *
+ * Read guest memory into a buffer.
+ */
+void qtest_memread(QTestState *s, uint64_t addr, void *data, size_t size);
+
+/**
+ * qtest_memwrite:
+ * @s: QTestState instance to operate on.
+ * @addr: Guest address to write to.
+ * @data: Pointer to the bytes that will be written to guest memory.
+ * @size: Number of bytes to write.
+ *
+ * Write a buffer to guest memory.
+ */
+void qtest_memwrite(QTestState *s, uint64_t addr, const void *data, size_t size);
+
+/**
+ * qtest_clock_step_next:
+ * @s: QTestState instance to operate on.
+ *
+ * Advance the vm_clock to the next deadline.  Return the current
+ * value of the vm_clock in nanoseconds.
+ */
+int64_t qtest_clock_step_next(QTestState *s);
+
+/**
+ * qtest_clock_step:
+ * @s: QTestState instance to operate on.
+ * @step: Number of nanoseconds to advance the clock by.
+ *
+ * Advance the vm_clock by @step nanoseconds.  Return the current
+ * value of the vm_clock in nanoseconds.
+ */
+int64_t qtest_clock_step(QTestState *s, int64_t step);
+
+/**
+ * qtest_clock_set:
+ * @s: QTestState instance to operate on.
+ * @val: Nanoseconds value to advance the clock to.
+ *
+ * Advance the vm_clock to @val nanoseconds since the VM was launched.
+ * Return the current value of the vm_clock in nanoseconds.
+ */
+int64_t qtest_clock_set(QTestState *s, int64_t val);
+
+/**
+ * qtest_get_arch:
+ *
+ * Returns the architecture for the QEMU executable under test.
+ */
+const char *qtest_get_arch(void);
+
+/**
+ * qtest_add_func:
+ * @str: Test case path.
+ * @fn: Test case function
+ *
+ * Add a GTester testcase with the given name and function.
+ * The path is prefixed with the architecture under test, as
+ * returned by qtest_get_arch.
+ */
+void qtest_add_func(const char *str, void (*fn));
+
+/**
+ * qtest_start:
+ * @args: other arguments to pass to QEMU
+ *
+ * Start QEMU and assign the resulting QTestState to a global variable.
+ * The global variable is used by "shortcut" macros documented below.
+ */
+#define qtest_start(args) (            \
+    global_qtest = qtest_init((args)) \
+        )
+
+/**
+ * get_irq:
+ * @num: Interrupt to observe.
+ *
+ * Return the level of the @num interrupt.
+ */
+#define get_irq(num) qtest_get_irq(global_qtest, num)
+
+/**
+ * irq_intercept_in:
+ * @string: QOM path of a device.
+ *
+ * Associate qtest irqs with the GPIO-in pins of the device
+ * whose path is specified by @string.
+ */
+#define irq_intercept_in(string) qtest_irq_intercept_in(global_qtest, string)
+
+/**
+ * qtest_irq_intercept_out:
+ * @string: QOM path of a device.
+ *
+ * Associate qtest irqs with the GPIO-out pins of the device
+ * whose path is specified by @string.
+ */
+#define irq_intercept_out(string) qtest_irq_intercept_out(global_qtest, string)
+
+/**
+ * outb:
+ * @addr: I/O port to write to.
+ * @value: Value being written.
+ *
+ * Write an 8-bit value to an I/O port.
+ */
+#define outb(addr, val) qtest_outb(global_qtest, addr, val)
+
+/**
+ * outw:
+ * @addr: I/O port to write to.
+ * @value: Value being written.
+ *
+ * Write a 16-bit value to an I/O port.
+ */
+#define outw(addr, val) qtest_outw(global_qtest, addr, val)
+
+/**
+ * outl:
+ * @addr: I/O port to write to.
+ * @value: Value being written.
+ *
+ * Write a 32-bit value to an I/O port.
+ */
+#define outl(addr, val) qtest_outl(global_qtest, addr, val)
+
+/**
+ * inb:
+ * @addr: I/O port to read from.
+ * @value: Value being written.
+ *
+ * Returns an 8-bit value from an I/O port.
+ */
+#define inb(addr) qtest_inb(global_qtest, addr)
+
+/**
+ * inw:
+ * @addr: I/O port to read from.
+ * @value: Value being written.
+ *
+ * Returns a 16-bit value from an I/O port.
+ */
+#define inw(addr) qtest_inw(global_qtest, addr)
+
+/**
+ * inl:
+ * @addr: I/O port to read from.
+ * @value: Value being written.
+ *
+ * Returns a 32-bit value from an I/O port.
+ */
+#define inl(addr) qtest_inl(global_qtest, addr)
+
+/**
+ * memread:
+ * @addr: Guest address to read from.
+ * @data: Pointer to where memory contents will be stored.
+ * @size: Number of bytes to read.
+ *
+ * Read guest memory into a buffer.
+ */
+#define memread(addr, data, size) qtest_memread(global_qtest, addr, data, size)
+
+/**
+ * memwrite:
+ * @addr: Guest address to write to.
+ * @data: Pointer to the bytes that will be written to guest memory.
+ * @size: Number of bytes to write.
+ *
+ * Write a buffer to guest memory.
+ */
+#define memwrite(addr, data, size) qtest_memwrite(global_qtest, addr, data, size)
+
+/**
+ * clock_step_next:
+ *
+ * Advance the vm_clock to the next deadline.  Return the current
+ * value of the vm_clock in nanoseconds.
+ */
+#define clock_step_next() qtest_clock_step_next(global_qtest)
+
+/**
+ * clock_step:
+ * @step: Number of nanoseconds to advance the clock by.
+ *
+ * Advance the vm_clock by @step nanoseconds.  Return the current
+ * value of the vm_clock in nanoseconds.
+ */
+#define clock_step(step) qtest_clock_step(global_qtest, step)
+
+/**
+ * clock_set:
+ * @val: Nanoseconds value to advance the clock to.
+ *
+ * Advance the vm_clock to @val nanoseconds since the VM was launched.
+ * Return the current value of the vm_clock in nanoseconds.
+ */
+#define clock_set(val) qtest_clock_set(global_qtest, val)
+
+#endif