From f186d64d8fda4bb22c15beb8e45b7814fbd8b51e Mon Sep 17 00:00:00 2001 From: Pavel Dovgalyuk Date: Mon, 26 Sep 2016 11:08:04 +0300 Subject: [PATCH] replay: move internal data to the structure This patch moves replay static variables into the structure to allow saving and loading them with savevm/loadvm. Reviewed-by: Paolo Bonzini Signed-off-by: Pavel Dovgalyuk Message-Id: <20160926080804.6992.87687.stgit@PASHA-ISP> Signed-off-by: Paolo Bonzini --- replay/replay-events.c | 2 +- replay/replay-internal.c | 20 +++++++++----------- replay/replay-internal.h | 8 +++++--- replay/replay-time.c | 2 +- replay/replay.c | 15 ++++++++------- 5 files changed, 24 insertions(+), 23 deletions(-) diff --git a/replay/replay-events.c b/replay/replay-events.c index 3807245ae7..4eb2ea3604 100644 --- a/replay/replay-events.c +++ b/replay/replay-events.c @@ -279,7 +279,7 @@ static Event *replay_read_event(int checkpoint) /* Called with replay mutex locked */ void replay_read_events(int checkpoint) { - while (replay_data_kind == EVENT_ASYNC) { + while (replay_state.data_kind == EVENT_ASYNC) { Event *event = replay_read_event(checkpoint); if (!event) { break; diff --git a/replay/replay-internal.c b/replay/replay-internal.c index 5835e8def3..bea7b4aa6b 100644 --- a/replay/replay-internal.c +++ b/replay/replay-internal.c @@ -16,11 +16,8 @@ #include "qemu/error-report.h" #include "sysemu/sysemu.h" -unsigned int replay_data_kind = -1; -static unsigned int replay_has_unread_data; - /* Mutex to protect reading and writing events to the log. - replay_data_kind and replay_has_unread_data are also protected + data_kind and has_unread_data are also protected by this mutex. It also protects replay events queue which stores events to be written or read to the log. */ @@ -150,15 +147,16 @@ void replay_check_error(void) void replay_fetch_data_kind(void) { if (replay_file) { - if (!replay_has_unread_data) { - replay_data_kind = replay_get_byte(); - if (replay_data_kind == EVENT_INSTRUCTION) { + if (!replay_state.has_unread_data) { + replay_state.data_kind = replay_get_byte(); + if (replay_state.data_kind == EVENT_INSTRUCTION) { replay_state.instructions_count = replay_get_dword(); } replay_check_error(); - replay_has_unread_data = 1; - if (replay_data_kind >= EVENT_COUNT) { - error_report("Replay: unknown event kind %d", replay_data_kind); + replay_state.has_unread_data = 1; + if (replay_state.data_kind >= EVENT_COUNT) { + error_report("Replay: unknown event kind %d", + replay_state.data_kind); exit(1); } } @@ -167,7 +165,7 @@ void replay_fetch_data_kind(void) void replay_finish_event(void) { - replay_has_unread_data = 0; + replay_state.has_unread_data = 0; replay_fetch_data_kind(); } diff --git a/replay/replay-internal.h b/replay/replay-internal.h index efbf14c8a7..9b02d7d6aa 100644 --- a/replay/replay-internal.h +++ b/replay/replay-internal.h @@ -62,11 +62,13 @@ typedef struct ReplayState { uint64_t current_step; /*! Number of instructions to be executed before other events happen. */ int instructions_count; + /*! Type of the currently executed event. */ + unsigned int data_kind; + /*! Flag which indicates that event is not processed yet. */ + unsigned int has_unread_data; } ReplayState; extern ReplayState replay_state; -extern unsigned int replay_data_kind; - /* File for replay writing */ extern FILE *replay_file; @@ -98,7 +100,7 @@ void replay_check_error(void); the next event from the log. */ void replay_finish_event(void); /*! Reads data type from the file and stores it in the - replay_data_kind variable. */ + data_kind variable. */ void replay_fetch_data_kind(void); /*! Saves queued events (like instructions and sound). */ diff --git a/replay/replay-time.c b/replay/replay-time.c index fffe072c55..f70382a88f 100644 --- a/replay/replay-time.c +++ b/replay/replay-time.c @@ -31,7 +31,7 @@ int64_t replay_save_clock(ReplayClockKind kind, int64_t clock) void replay_read_next_clock(ReplayClockKind kind) { - unsigned int read_kind = replay_data_kind - EVENT_CLOCK; + unsigned int read_kind = replay_state.data_kind - EVENT_CLOCK; assert(read_kind == kind); diff --git a/replay/replay.c b/replay/replay.c index 167fd2942d..cc2238d077 100644 --- a/replay/replay.c +++ b/replay/replay.c @@ -38,15 +38,15 @@ bool replay_next_event_is(int event) /* nothing to skip - not all instructions used */ if (replay_state.instructions_count != 0) { - assert(replay_data_kind == EVENT_INSTRUCTION); + assert(replay_state.data_kind == EVENT_INSTRUCTION); return event == EVENT_INSTRUCTION; } while (true) { - if (event == replay_data_kind) { + if (event == replay_state.data_kind) { res = true; } - switch (replay_data_kind) { + switch (replay_state.data_kind) { case EVENT_SHUTDOWN: replay_finish_event(); qemu_system_shutdown_request(); @@ -85,7 +85,7 @@ void replay_account_executed_instructions(void) replay_state.instructions_count -= count; replay_state.current_step += count; if (replay_state.instructions_count == 0) { - assert(replay_data_kind == EVENT_INSTRUCTION); + assert(replay_state.data_kind == EVENT_INSTRUCTION); replay_finish_event(); /* Wake up iothread. This is required because timers will not expire until clock counters @@ -188,7 +188,7 @@ bool replay_checkpoint(ReplayCheckpoint checkpoint) if (replay_mode == REPLAY_MODE_PLAY) { if (replay_next_event_is(EVENT_CHECKPOINT + checkpoint)) { replay_finish_event(); - } else if (replay_data_kind != EVENT_ASYNC) { + } else if (replay_state.data_kind != EVENT_ASYNC) { res = false; goto out; } @@ -196,7 +196,7 @@ bool replay_checkpoint(ReplayCheckpoint checkpoint) /* replay_read_events may leave some unread events. Return false if not all of the events associated with checkpoint were processed */ - res = replay_data_kind != EVENT_ASYNC; + res = replay_state.data_kind != EVENT_ASYNC; } else if (replay_mode == REPLAY_MODE_RECORD) { replay_put_event(EVENT_CHECKPOINT + checkpoint); replay_save_events(checkpoint); @@ -237,9 +237,10 @@ static void replay_enable(const char *fname, int mode) replay_filename = g_strdup(fname); replay_mode = mode; - replay_data_kind = -1; + replay_state.data_kind = -1; replay_state.instructions_count = 0; replay_state.current_step = 0; + replay_state.has_unread_data = 0; /* skip file header for RECORD and check it for PLAY */ if (replay_mode == REPLAY_MODE_RECORD) {