replay/replay-internal.h

   1 #ifndef REPLAY_INTERNAL_H
   2 #define REPLAY_INTERNAL_H
   3
   4 /*
   5  * replay-internal.h
   6  *
   7  * Copyright (c) 2010-2015 Institute for System Programming
   8  *                         of the Russian Academy of Sciences.
   9  *
  10  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  11  * See the COPYING file in the top-level directory.
  12  *
  13  */
  14
  15 #include <stdio.h>
  16
  17 enum ReplayEvents {
  18     /* for instruction event */
  19     EVENT_INSTRUCTION,
  20     /* for software interrupt */
  21     EVENT_INTERRUPT,
  22     /* for emulated exceptions */
  23     EVENT_EXCEPTION,
  24     /* for async events */
  25     EVENT_ASYNC,
  26     /* for shutdown request */
  27     EVENT_SHUTDOWN,
  28     /* for clock read/writes */
  29     /* some of greater codes are reserved for clocks */
  30     EVENT_CLOCK,
  31     EVENT_CLOCK_LAST = EVENT_CLOCK + REPLAY_CLOCK_COUNT - 1,
  32     /* for checkpoint event */
  33     /* some of greater codes are reserved for checkpoints */
  34     EVENT_CHECKPOINT,
  35     EVENT_CHECKPOINT_LAST = EVENT_CHECKPOINT + CHECKPOINT_COUNT - 1,
  36     /* end of log event */
  37     EVENT_END,
  38     EVENT_COUNT
  39 };
  40
  41 /* Asynchronous events IDs */
  42
  43 enum ReplayAsyncEventKind {
  44     REPLAY_ASYNC_EVENT_BH,
  45     REPLAY_ASYNC_COUNT
  46 };
  47
  48 typedef enum ReplayAsyncEventKind ReplayAsyncEventKind;
  49
  50 typedef struct ReplayState {
  51     /*! Cached clock values. */
  52     int64_t cached_clock[REPLAY_CLOCK_COUNT];
  53     /*! Current step - number of processed instructions and timer events. */
  54     uint64_t current_step;
  55     /*! Number of instructions to be executed before other events happen. */
  56     int instructions_count;
  57 } ReplayState;
  58 extern ReplayState replay_state;
  59
  60 extern unsigned int replay_data_kind;
  61
  62 /* File for replay writing */
  63 extern FILE *replay_file;
  64
  65 void replay_put_byte(uint8_t byte);
  66 void replay_put_event(uint8_t event);
  67 void replay_put_word(uint16_t word);
  68 void replay_put_dword(uint32_t dword);
  69 void replay_put_qword(int64_t qword);
  70 void replay_put_array(const uint8_t *buf, size_t size);
  71
  72 uint8_t replay_get_byte(void);
  73 uint16_t replay_get_word(void);
  74 uint32_t replay_get_dword(void);
  75 int64_t replay_get_qword(void);
  76 void replay_get_array(uint8_t *buf, size_t *size);
  77 void replay_get_array_alloc(uint8_t **buf, size_t *size);
  78
  79 /* Mutex functions for protecting replay log file */
  80
  81 void replay_mutex_init(void);
  82 void replay_mutex_destroy(void);
  83 void replay_mutex_lock(void);
  84 void replay_mutex_unlock(void);
  85
  86 /*! Checks error status of the file. */
  87 void replay_check_error(void);
  88
  89 /*! Finishes processing of the replayed event and fetches
  90     the next event from the log. */
  91 void replay_finish_event(void);
  92 /*! Reads data type from the file and stores it in the
  93     replay_data_kind variable. */
  94 void replay_fetch_data_kind(void);
  95
  96 /*! Saves queued events (like instructions and sound). */
  97 void replay_save_instructions(void);
  98
  99 /*! Skips async events until some sync event will be found.
 100     \return true, if event was found */
 101 bool replay_next_event_is(int event);
 102
 103 /*! Reads next clock value from the file.
 104     If clock kind read from the file is different from the parameter,
 105     the value is not used. */
 106 void replay_read_next_clock(unsigned int kind);
 107
 108 /* Asynchronous events queue */
 109
 110 /*! Initializes events' processing internals */
 111 void replay_init_events(void);
 112 /*! Clears internal data structures for events handling */
 113 void replay_finish_events(void);
 114 /*! Enables storing events in the queue */
 115 void replay_enable_events(void);
 116 /*! Flushes events queue */
 117 void replay_flush_events(void);
 118 /*! Clears events list before loading new VM state */
 119 void replay_clear_events(void);
 120 /*! Returns true if there are any unsaved events in the queue */
 121 bool replay_has_events(void);
 122 /*! Saves events from queue into the file */
 123 void replay_save_events(int checkpoint);
 124 /*! Read events from the file into the input queue */
 125 void replay_read_events(int checkpoint);
 126
 127 #endif