replay: Extract core API to 'exec/replay-core.h'

replay API is used deeply within TCG common code (common to user
and system emulation). Unfortunately "sysemu/replay.h" requires
some QAPI headers for few system-specific declarations, example:

  void replay_input_event(QemuConsole *src, InputEvent *evt);

Since commit c2651c0eaa ("qapi/meson: Restrict UI module to system
emulation and tools") the QAPI header defining the InputEvent is
not generated anymore.
To keep it simple, extract the 'core' replay prototypes to a new
"exec/replay-core.h" header which we include in the TCG code that
doesn't need the rest of the replay API.

Reviewed-by: Pavel Dovgalyuk <Pavel.Dovgalyuk@ispras.ru>
Message-Id: <20221219170806.60580-5-philmd@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

MAINTAINERS

@@ -3237,6 +3237,7 @@ S: Supported
 F: replay/*
 F: block/blkreplay.c
 F: net/filter-replay.c
+F: include/exec/replay-core.h
 F: include/sysemu/replay.h
 F: docs/devel/replay.rst
 F: docs/system/replay.rst

accel/tcg/cpu-exec.c

@@ -36,7 +36,7 @@
 #include "sysemu/cpus.h"
 #include "exec/cpu-all.h"
 #include "sysemu/cpu-timers.h"
-#include "sysemu/replay.h"
+#include "exec/replay-core.h"
 #include "sysemu/tcg.h"
 #include "exec/helper-proto.h"
 #include "tb-jmp-cache.h"

accel/tcg/tcg-all.c

@@ -25,7 +25,7 @@
 
 #include "qemu/osdep.h"
 #include "sysemu/tcg.h"
-#include "sysemu/replay.h"
+#include "exec/replay-core.h"
 #include "sysemu/cpu-timers.h"
 #include "tcg/tcg.h"
 #include "qapi/error.h"

accel/tcg/translator.c

@@ -16,7 +16,7 @@
 #include "exec/log.h"
 #include "exec/translator.h"
 #include "exec/plugin-gen.h"
-#include "sysemu/replay.h"
+#include "exec/replay-core.h"
 
 /* Pairs with tcg_clear_temp_count.
    To be called by #TranslatorOps.{translate_insn,tb_stop} if

accel/tcg/user-exec-stub.c

@@ -1,6 +1,6 @@
 #include "qemu/osdep.h"
 #include "hw/core/cpu.h"
-#include "sysemu/replay.h"
+#include "exec/replay-core.h"
 
 bool enable_cpu_pm = false;
 

cpu.c

@@ -33,7 +33,7 @@
 #endif
 #include "sysemu/tcg.h"
 #include "sysemu/kvm.h"
-#include "sysemu/replay.h"
+#include "exec/replay-core.h"
 #include "exec/cpu-common.h"
 #include "exec/exec-all.h"
 #include "exec/translate-all.h"

gdbstub/gdbstub.c

@@ -48,7 +48,7 @@
 #include "sysemu/runstate.h"
 #include "semihosting/semihost.h"
 #include "exec/exec-all.h"
-#include "sysemu/replay.h"
+#include "exec/replay-core.h"
 
 #include "internals.h"
 

hw/core/ptimer.c

@@ -10,7 +10,7 @@
 #include "hw/ptimer.h"
 #include "migration/vmstate.h"
 #include "qemu/host-utils.h"
-#include "sysemu/replay.h"
+#include "exec/replay-core.h"
 #include "sysemu/cpu-timers.h"
 #include "sysemu/qtest.h"
 #include "block/aio.h"

include/exec/replay-core.h

@@ -0,0 +1,80 @@
+/*
+ * QEMU replay core API
+ *
+ * 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.
+ */
+
+#ifndef EXEC_REPLAY_H
+#define EXEC_REPLAY_H
+
+#include "qapi/qapi-types-replay.h"
+
+extern ReplayMode replay_mode;
+
+/* Replay process control functions */
+
+/* Enables recording or saving event log with specified parameters */
+void replay_configure(struct QemuOpts *opts);
+/* Initializes timers used for snapshotting and enables events recording */
+void replay_start(void);
+/* Closes replay log file and frees other resources. */
+void replay_finish(void);
+/* Adds replay blocker with the specified error description */
+void replay_add_blocker(const char *feature);
+/* Returns name of the replay log file */
+const char *replay_get_filename(void);
+
+/*
+ * Start making one step in backward direction.
+ * Used by gdbstub for backwards debugging.
+ * Returns true on success.
+ */
+bool replay_reverse_step(void);
+/*
+ * Start searching the last breakpoint/watchpoint.
+ * Used by gdbstub for backwards debugging.
+ * Returns true if the process successfully started.
+ */
+bool replay_reverse_continue(void);
+/*
+ * Returns true if replay module is processing
+ * reverse_continue or reverse_step request
+ */
+bool replay_running_debug(void);
+/* Called in reverse debugging mode to collect breakpoint information */
+void replay_breakpoint(void);
+/* Called when gdb is attached to gdbstub */
+void replay_gdb_attached(void);
+
+/* Interrupts and exceptions */
+
+/* Called by exception handler to write or read exception processing events */
+bool replay_exception(void);
+/*
+ * Used to determine that exception is pending.
+ * Does not proceed to the next event in the log.
+ */
+bool replay_has_exception(void);
+/*
+ * Called by interrupt handlers to write or read interrupt processing events.
+ * Returns true if interrupt should be processed.
+ */
+bool replay_interrupt(void);
+/*
+ * Tries to read interrupt event from the file.
+ * Returns true, when interrupt request is pending.
+ */
+bool replay_has_interrupt(void);
+
+/* Processing data from random generators */
+
+/* Saves the values from the random number generator */
+void replay_save_random(int ret, void *buf, size_t len);
+/* Loads the saved values for the random number generator */
+int replay_read_random(void *buf, size_t len);
+
+#endif

include/sysemu/replay.h

@@ -1,8 +1,8 @@
-#ifndef REPLAY_H
-#define REPLAY_H
+#ifndef SYSEMU_REPLAY_H
+#define SYSEMU_REPLAY_H
 
 /*
- * replay.h
+ * QEMU replay (system interface)
  *
  * Copyright (c) 2010-2015 Institute for System Programming
  *                         of the Russian Academy of Sciences.
@@ -12,9 +12,9 @@
  *
  */
 
+#include "exec/replay-core.h"
 #include "qapi/qapi-types-misc.h"
 #include "qapi/qapi-types-run-state.h"
-#include "qapi/qapi-types-replay.h"
 #include "qapi/qapi-types-ui.h"
 #include "block/aio.h"
 
@@ -45,8 +45,6 @@ typedef enum ReplayCheckpoint ReplayCheckpoint;
 
 typedef struct ReplayNetState ReplayNetState;
 
-extern ReplayMode replay_mode;
-
 /* Name of the initial VM snapshot */
 extern char *replay_snapshot;
 
@@ -63,40 +61,6 @@ extern char *replay_snapshot;
 void replay_mutex_lock(void);
 void replay_mutex_unlock(void);
 
-/* Replay process control functions */
-
-/*! Enables recording or saving event log with specified parameters */
-void replay_configure(struct QemuOpts *opts);
-/*! Initializes timers used for snapshotting and enables events recording */
-void replay_start(void);
-/*! Closes replay log file and frees other resources. */
-void replay_finish(void);
-/*! Adds replay blocker with the specified error description */
-void replay_add_blocker(const char *feature);
-/* Returns name of the replay log file */
-const char *replay_get_filename(void);
-/*
- * Start making one step in backward direction.
- * Used by gdbstub for backwards debugging.
- * Returns true on success.
- */
-bool replay_reverse_step(void);
-/*
- * Start searching the last breakpoint/watchpoint.
- * Used by gdbstub for backwards debugging.
- * Returns true if the process successfully started.
- */
-bool replay_reverse_continue(void);
-/*
- * Returns true if replay module is processing
- * reverse_continue or reverse_step request
- */
-bool replay_running_debug(void);
-/* Called in reverse debugging mode to collect breakpoint information */
-void replay_breakpoint(void);
-/* Called when gdb is attached to gdbstub */
-void replay_gdb_attached(void);
-
 /* Processing the instructions */
 
 /*! Returns number of executed instructions. */
@@ -106,22 +70,6 @@ int replay_get_instructions(void);
 /*! Updates instructions counter in replay mode. */
 void replay_account_executed_instructions(void);
 
-/* Interrupts and exceptions */
-
-/*! Called by exception handler to write or read
-    exception processing events. */
-bool replay_exception(void);
-/*! Used to determine that exception is pending.
-    Does not proceed to the next event in the log. */
-bool replay_has_exception(void);
-/*! Called by interrupt handlers to write or read
-    interrupt processing events.
-    \return true if interrupt should be processed */
-bool replay_interrupt(void);
-/*! Tries to read interrupt event from the file.
-    Returns true, when interrupt request is pending */
-bool replay_has_interrupt(void);
-
 /* Processing clocks and other time sources */
 
 /*! Save the specified clock */
@@ -143,13 +91,6 @@ int64_t replay_read_clock(ReplayClockKind kind, int64_t raw_icount);
             ? replay_save_clock((clock), (value), icount_get_raw_locked()) \
             : (value))
 
-/* Processing data from random generators */
-
-/* Saves the values from the random number generator */
-void replay_save_random(int ret, void *buf, size_t len);
-/* Loads the saved values for the random number generator */
-int replay_read_random(void *buf, size_t len);
-
 /* Events */
 
 /*! Called when qemu shutdown is requested. */

stubs/replay.c

@@ -1,5 +1,5 @@
 #include "qemu/osdep.h"
-#include "sysemu/replay.h"
+#include "exec/replay-core.h"
 
 ReplayMode replay_mode;
 

tests/unit/ptimer-test-stubs.c

@@ -10,7 +10,7 @@
 
 #include "qemu/osdep.h"
 #include "qemu/main-loop.h"
-#include "sysemu/replay.h"
+#include "exec/replay-core.h"
 #include "migration/vmstate.h"
 
 #include "ptimer-test.h"

util/guest-random.c

@@ -14,7 +14,7 @@
 #include "qapi/error.h"
 #include "qemu/guest-random.h"
 #include "crypto/random.h"
-#include "sysemu/replay.h"
+#include "exec/replay-core.h"
 
 
 static __thread GRand *thread_rand;