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#ifndef REPLAY_INTERNAL_H
#define REPLAY_INTERNAL_H
/*
* replay-internal.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 <stdio.h>
enum ReplayEvents {
/* for instruction event */
EVENT_INSTRUCTION,
/* for software interrupt */
EVENT_INTERRUPT,
/* for emulated exceptions */
EVENT_EXCEPTION,
/* for async events */
EVENT_ASYNC,
/* for shutdown request */
EVENT_SHUTDOWN,
/* for clock read/writes */
/* some of greater codes are reserved for clocks */
EVENT_CLOCK,
EVENT_CLOCK_LAST = EVENT_CLOCK + REPLAY_CLOCK_COUNT - 1,
/* for checkpoint event */
/* some of greater codes are reserved for checkpoints */
EVENT_CHECKPOINT,
EVENT_CHECKPOINT_LAST = EVENT_CHECKPOINT + CHECKPOINT_COUNT - 1,
/* end of log event */
EVENT_END,
EVENT_COUNT
};
/* Asynchronous events IDs */
enum ReplayAsyncEventKind {
REPLAY_ASYNC_EVENT_BH,
REPLAY_ASYNC_COUNT
};
typedef enum ReplayAsyncEventKind ReplayAsyncEventKind;
typedef struct ReplayState {
/*! Cached clock values. */
int64_t cached_clock[REPLAY_CLOCK_COUNT];
/*! Current step - number of processed instructions and timer events. */
uint64_t current_step;
/*! Number of instructions to be executed before other events happen. */
int instructions_count;
} ReplayState;
extern ReplayState replay_state;
extern unsigned int replay_data_kind;
/* File for replay writing */
extern FILE *replay_file;
void replay_put_byte(uint8_t byte);
void replay_put_event(uint8_t event);
void replay_put_word(uint16_t word);
void replay_put_dword(uint32_t dword);
void replay_put_qword(int64_t qword);
void replay_put_array(const uint8_t *buf, size_t size);
uint8_t replay_get_byte(void);
uint16_t replay_get_word(void);
uint32_t replay_get_dword(void);
int64_t replay_get_qword(void);
void replay_get_array(uint8_t *buf, size_t *size);
void replay_get_array_alloc(uint8_t **buf, size_t *size);
/* Mutex functions for protecting replay log file */
void replay_mutex_init(void);
void replay_mutex_destroy(void);
void replay_mutex_lock(void);
void replay_mutex_unlock(void);
/*! Checks error status of the file. */
void replay_check_error(void);
/*! Finishes processing of the replayed event and fetches
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. */
void replay_fetch_data_kind(void);
/*! Saves queued events (like instructions and sound). */
void replay_save_instructions(void);
/*! Skips async events until some sync event will be found.
\return true, if event was found */
bool replay_next_event_is(int event);
/*! Reads next clock value from the file.
If clock kind read from the file is different from the parameter,
the value is not used. */
void replay_read_next_clock(unsigned int kind);
/* Asynchronous events queue */
/*! Initializes events' processing internals */
void replay_init_events(void);
/*! Clears internal data structures for events handling */
void replay_finish_events(void);
/*! Enables storing events in the queue */
void replay_enable_events(void);
/*! Flushes events queue */
void replay_flush_events(void);
/*! Clears events list before loading new VM state */
void replay_clear_events(void);
/*! Returns true if there are any unsaved events in the queue */
bool replay_has_events(void);
/*! Saves events from queue into the file */
void replay_save_events(int checkpoint);
/*! Read events from the file into the input queue */
void replay_read_events(int checkpoint);
#endif
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