[Qemu-devel] [RFC PATCH v8 02/21] replay: global variables and function stubs

[Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>]

This patch adds global variables, defines, functions declarations,
and function stubs for deterministic VM replay used by external modules.

Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
---
 Makefile.target      |    1 +
 qapi-schema.json     |   18 ++++++++++++++++++
 replay/Makefile.objs |    1 +
 replay/replay.c      |   14 ++++++++++++++
 replay/replay.h      |   19 +++++++++++++++++++
 stubs/Makefile.objs  |    1 +
 stubs/replay.c       |    3 +++
 7 files changed, 57 insertions(+), 0 deletions(-)
 create mode 100755 replay/Makefile.objs
 create mode 100755 replay/replay.c
 create mode 100755 replay/replay.h
 create mode 100755 stubs/replay.c

diff --git a/Makefile.target b/Makefile.target
index e9ff1ee..a45378f 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -83,6 +83,7 @@ all: $(PROGS) stap
 #########################################################
 # cpu emulator library
 obj-y = exec.o translate-all.o cpu-exec.o
+obj-y += replay/
 obj-y += tcg/tcg.o tcg/optimize.o
 obj-$(CONFIG_TCG_INTERPRETER) += tci.o
 obj-$(CONFIG_TCG_INTERPRETER) += disas/tci.o
diff --git a/qapi-schema.json b/qapi-schema.json
index fbfc52f..7e3177f 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -3523,3 +3523,21 @@
 # Since: 2.1
 ##
 { 'command': 'rtc-reset-reinjection' }
+
+##
+# ReplayMode:
+#
+# Mode of the replay subsystem.
+#
+# @none: normal execution mode. Replay or record are not enabled.
+#
+# @record: record mode. All non-deterministic data is written into the
+#          replay log.
+#
+# @play: replay mode. Non-deterministic data required for system execution
+#        is read from the log.
+#
+# Since: 2.3
+##
+{ 'enum': 'ReplayMode',
+  'data': [ 'none', 'record', 'play' ] }
diff --git a/replay/Makefile.objs b/replay/Makefile.objs
new file mode 100755
index 0000000..7ea860f
--- /dev/null
+++ b/replay/Makefile.objs
@@ -0,0 +1 @@
+obj-y += replay.o
diff --git a/replay/replay.c b/replay/replay.c
new file mode 100755
index 0000000..5ce066f
--- /dev/null
+++ b/replay/replay.c
@@ -0,0 +1,14 @@
+/*
+ * replay.c
+ *
+ * Copyright (c) 2010-2015 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 "replay.h"
+
+ReplayMode replay_mode = REPLAY_MODE_NONE;
diff --git a/replay/replay.h b/replay/replay.h
new file mode 100755
index 0000000..d6b73c3
--- /dev/null
+++ b/replay/replay.h
@@ -0,0 +1,19 @@
+#ifndef REPLAY_H
+#define REPLAY_H
+
+/*
+ * replay.h
+ *
+ * Copyright (c) 2010-2015 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 "qapi-types.h"
+
+extern ReplayMode replay_mode;
+
+#endif
diff --git a/stubs/Makefile.objs b/stubs/Makefile.objs
index 5e347d0..45a6c71 100644
--- a/stubs/Makefile.objs
+++ b/stubs/Makefile.objs
@@ -27,6 +27,7 @@ stub-obj-y += notify-event.o
 stub-obj-y += pci-drive-hot-add.o
 stub-obj-$(CONFIG_SPICE) += qemu-chr-open-spice.o
 stub-obj-y += qtest.o
+stub-obj-y += replay.o
 stub-obj-y += reset.o
 stub-obj-y += runstate-check.o
 stub-obj-y += set-fd-handler.o
diff --git a/stubs/replay.c b/stubs/replay.c
new file mode 100755
index 0000000..563c777
--- /dev/null
+++ b/stubs/replay.c
@@ -0,0 +1,3 @@
+#include "replay/replay.h"
+
+ReplayMode replay_mode;