@@ -4,3 +4,4 @@ common-obj-y += replay-events.o
common-obj-y += replay-time.o
common-obj-y += replay-input.o
common-obj-y += replay-char.o
+common-obj-y += replay-snapshot.o
@@ -66,6 +66,8 @@ typedef struct ReplayState {
unsigned int data_kind;
/*! Flag which indicates that event is not processed yet. */
unsigned int has_unread_data;
+ /*! Temporary variable for saving current log offset. */
+ uint64_t file_offset;
} ReplayState;
extern ReplayState replay_state;
@@ -157,4 +159,11 @@ void replay_event_char_read_save(void *opaque);
/*! Reads char event read from the file. */
void *replay_event_char_read_load(void);
+/* VMState-related functions */
+
+/* Registers replay VMState.
+ Should be called before virtual devices initialization
+ to make cached timers available for post_load functions. */
+void replay_vmstate_register(void);
+
#endif
new file mode 100644
@@ -0,0 +1,60 @@
+/*
+ * replay-snapshot.c
+ *
+ * Copyright (c) 2010-2016 Institute for System Programming
+ * of the Russian Academy of Sciences.
+ *
+ * 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 "qapi/error.h"
+#include "qemu-common.h"
+#include "sysemu/replay.h"
+#include "replay-internal.h"
+#include "sysemu/sysemu.h"
+#include "monitor/monitor.h"
+#include "qapi/qmp/qstring.h"
+#include "qemu/error-report.h"
+#include "migration/vmstate.h"
+
+static void replay_pre_save(void *opaque)
+{
+ ReplayState *state = opaque;
+ state->file_offset = ftello64(replay_file);
+}
+
+static int replay_post_load(void *opaque, int version_id)
+{
+ ReplayState *state = opaque;
+ fseeko64(replay_file, state->file_offset, SEEK_SET);
+ /* If this was a vmstate, saved in recording mode,
+ we need to initialize replay data fields. */
+ replay_fetch_data_kind();
+
+ return 0;
+}
+
+static const VMStateDescription vmstate_replay = {
+ .name = "replay",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .pre_save = replay_pre_save,
+ .post_load = replay_post_load,
+ .fields = (VMStateField[]) {
+ VMSTATE_INT64_ARRAY(cached_clock, ReplayState, REPLAY_CLOCK_COUNT),
+ VMSTATE_UINT64(current_step, ReplayState),
+ VMSTATE_INT32(instructions_count, ReplayState),
+ VMSTATE_UINT32(data_kind, ReplayState),
+ VMSTATE_UINT32(has_unread_data, ReplayState),
+ VMSTATE_UINT64(file_offset, ReplayState),
+ VMSTATE_END_OF_LIST()
+ },
+};
+
+void replay_vmstate_register(void)
+{
+ vmstate_register(NULL, 0, &vmstate_replay, &replay_state);
+}
@@ -292,6 +292,7 @@ void replay_configure(QemuOpts *opts)
exit(1);
}
+ replay_vmstate_register();
replay_enable(fname, mode);
out:
This patch introduces vmstate for replay data structures. It allows saving and loading vmstate while replaying. Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru> --- replay/Makefile.objs | 1 + replay/replay-internal.h | 9 +++++++ replay/replay-snapshot.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++ replay/replay.c | 1 + 4 files changed, 71 insertions(+) create mode 100644 replay/replay-snapshot.c