tests: Add ptimer tests

Ptimer is a generic countdown timer helper that is used by many timer
device models as well as by the QEMU core. Add QTests for the ptimer.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Message-id: 1de89fe6e1ccaf6c8071ee3469e1a844df948359.1473252818.git.digetx@gmail.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

stubs/vmstate.c

@@ -3,6 +3,11 @@
 #include "migration/vmstate.h"
 
 const VMStateDescription vmstate_dummy = {};
+const VMStateInfo vmstate_info_uint8;
+const VMStateInfo vmstate_info_uint32;
+const VMStateInfo vmstate_info_uint64;
+const VMStateInfo vmstate_info_int64;
+const VMStateInfo vmstate_info_timer;
 
 int vmstate_register_with_alias_id(DeviceState *dev,
                                    int instance_id,

tests/Makefile.include

@@ -296,6 +296,7 @@ check-qtest-xtensaeb-y = $(check-qtest-xtensa-y)
 check-qtest-s390x-y = tests/boot-serial-test$(EXESUF)
 
 check-qtest-generic-y += tests/qom-test$(EXESUF)
+check-qtest-generic-y += tests/ptimer-test$(EXESUF)
 
 qapi-schema += alternate-any.json
 qapi-schema += alternate-array.json
@@ -658,6 +659,7 @@ tests/test-filter-mirror$(EXESUF): tests/test-filter-mirror.o $(qtest-obj-y)
 tests/test-filter-redirector$(EXESUF): tests/test-filter-redirector.o $(qtest-obj-y)
 tests/ivshmem-test$(EXESUF): tests/ivshmem-test.o contrib/ivshmem-server/ivshmem-server.o $(libqos-pc-obj-y)
 tests/vhost-user-bridge$(EXESUF): tests/vhost-user-bridge.o
+tests/ptimer-test$(EXESUF): tests/ptimer-test.o tests/ptimer-test-stubs.o hw/core/ptimer.o
 
 tests/migration/stress$(EXESUF): tests/migration/stress.o
 	$(call quiet-command, $(LINKPROG) -static -O3 $(PTHREAD_LIB) -o $@ $< ,"  LINK  $(TARGET_DIR)$@")

tests/ptimer-test-stubs.c

@@ -0,0 +1,107 @@
+/*
+ * Stubs for the ptimer-test
+ *
+ * Author: Dmitry Osipenko <digetx@gmail.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 "qemu/osdep.h"
+#include "qemu/main-loop.h"
+#include "sysemu/replay.h"
+
+#include "ptimer-test.h"
+
+struct QEMUBH {
+    QEMUBHFunc *cb;
+    void *opaque;
+};
+
+QEMUTimerListGroup main_loop_tlg;
+
+int64_t ptimer_test_time_ns;
+
+void timer_init_tl(QEMUTimer *ts,
+                   QEMUTimerList *timer_list, int scale,
+                   QEMUTimerCB *cb, void *opaque)
+{
+    ts->timer_list = timer_list;
+    ts->cb = cb;
+    ts->opaque = opaque;
+    ts->scale = scale;
+    ts->expire_time = -1;
+}
+
+void timer_mod(QEMUTimer *ts, int64_t expire_time)
+{
+    QEMUTimerList *timer_list = ts->timer_list;
+    QEMUTimer *t = &timer_list->active_timers;
+
+    while (t->next != NULL) {
+        if (t->next == ts) {
+            break;
+        }
+
+        t = t->next;
+    }
+
+    ts->expire_time = MAX(expire_time * ts->scale, 0);
+    ts->next = NULL;
+    t->next = ts;
+}
+
+void timer_del(QEMUTimer *ts)
+{
+    QEMUTimerList *timer_list = ts->timer_list;
+    QEMUTimer *t = &timer_list->active_timers;
+
+    while (t->next != NULL) {
+        if (t->next == ts) {
+            t->next = ts->next;
+            return;
+        }
+
+        t = t->next;
+    }
+}
+
+int64_t qemu_clock_get_ns(QEMUClockType type)
+{
+    return ptimer_test_time_ns;
+}
+
+int64_t qemu_clock_deadline_ns_all(QEMUClockType type)
+{
+    QEMUTimerList *timer_list = main_loop_tlg.tl[type];
+    QEMUTimer *t = timer_list->active_timers.next;
+    int64_t deadline = -1;
+
+    while (t != NULL) {
+        if (deadline == -1) {
+            deadline = t->expire_time;
+        } else {
+            deadline = MIN(deadline, t->expire_time);
+        }
+
+        t = t->next;
+    }
+
+    return deadline;
+}
+
+QEMUBH *qemu_bh_new(QEMUBHFunc *cb, void *opaque)
+{
+    QEMUBH *bh = g_new(QEMUBH, 1);
+
+    bh->cb = cb;
+    bh->opaque = opaque;
+
+    return bh;
+}
+
+void replay_bh_schedule_event(QEMUBH *bh)
+{
+    bh->cb(bh->opaque);
+}

tests/ptimer-test.h

@@ -0,0 +1,22 @@
+/*
+ * QTest testcase for the ptimer
+ *
+ * Author: Dmitry Osipenko <digetx@gmail.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 PTIMER_TEST_H
+#define PTIMER_TEST_H
+
+extern bool qtest_allowed;
+
+extern int64_t ptimer_test_time_ns;
+
+struct QEMUTimerList {
+    QEMUTimer active_timers;
+};
+
+#endif