replay-internal.h (6414B)
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 /* Asynchronous events IDs */ 16 17 typedef enum ReplayAsyncEventKind { 18 REPLAY_ASYNC_EVENT_BH, 19 REPLAY_ASYNC_EVENT_BH_ONESHOT, 20 REPLAY_ASYNC_EVENT_INPUT, 21 REPLAY_ASYNC_EVENT_INPUT_SYNC, 22 REPLAY_ASYNC_EVENT_CHAR_READ, 23 REPLAY_ASYNC_EVENT_BLOCK, 24 REPLAY_ASYNC_EVENT_NET, 25 REPLAY_ASYNC_COUNT 26 } ReplayAsyncEventKind; 27 28 /* Any changes to order/number of events will need to bump REPLAY_VERSION */ 29 enum ReplayEvents { 30 /* for instruction event */ 31 EVENT_INSTRUCTION, 32 /* for software interrupt */ 33 EVENT_INTERRUPT, 34 /* for emulated exceptions */ 35 EVENT_EXCEPTION, 36 /* for async events */ 37 EVENT_ASYNC, 38 EVENT_ASYNC_LAST = EVENT_ASYNC + REPLAY_ASYNC_COUNT - 1, 39 /* for shutdown requests, range allows recovery of ShutdownCause */ 40 EVENT_SHUTDOWN, 41 EVENT_SHUTDOWN_LAST = EVENT_SHUTDOWN + SHUTDOWN_CAUSE__MAX, 42 /* for character device write event */ 43 EVENT_CHAR_WRITE, 44 /* for character device read all event */ 45 EVENT_CHAR_READ_ALL, 46 EVENT_CHAR_READ_ALL_ERROR, 47 /* for audio out event */ 48 EVENT_AUDIO_OUT, 49 /* for audio in event */ 50 EVENT_AUDIO_IN, 51 /* for random number generator */ 52 EVENT_RANDOM, 53 /* for clock read/writes */ 54 /* some of greater codes are reserved for clocks */ 55 EVENT_CLOCK, 56 EVENT_CLOCK_LAST = EVENT_CLOCK + REPLAY_CLOCK_COUNT - 1, 57 /* for checkpoint event */ 58 /* some of greater codes are reserved for checkpoints */ 59 EVENT_CHECKPOINT, 60 EVENT_CHECKPOINT_LAST = EVENT_CHECKPOINT + CHECKPOINT_COUNT - 1, 61 /* end of log event */ 62 EVENT_END, 63 EVENT_COUNT 64 }; 65 66 typedef struct ReplayState { 67 /*! Cached clock values. */ 68 int64_t cached_clock[REPLAY_CLOCK_COUNT]; 69 /*! Current icount - number of processed instructions. */ 70 uint64_t current_icount; 71 /*! Number of instructions to be executed before other events happen. */ 72 int instruction_count; 73 /*! Type of the currently executed event. */ 74 unsigned int data_kind; 75 /*! Flag which indicates that event is not processed yet. */ 76 unsigned int has_unread_data; 77 /*! Temporary variable for saving current log offset. */ 78 uint64_t file_offset; 79 /*! Next block operation id. 80 This counter is global, because requests from different 81 block devices should not get overlapping ids. */ 82 uint64_t block_request_id; 83 /*! Prior value of the host clock */ 84 uint64_t host_clock_last; 85 /*! Asynchronous event id read from the log */ 86 uint64_t read_event_id; 87 } ReplayState; 88 extern ReplayState replay_state; 89 90 /* File for replay writing */ 91 extern FILE *replay_file; 92 /* Instruction count of the replay breakpoint */ 93 extern uint64_t replay_break_icount; 94 /* Timer for the replay breakpoint callback */ 95 extern QEMUTimer *replay_break_timer; 96 97 void replay_put_byte(uint8_t byte); 98 void replay_put_event(uint8_t event); 99 void replay_put_word(uint16_t word); 100 void replay_put_dword(uint32_t dword); 101 void replay_put_qword(int64_t qword); 102 void replay_put_array(const uint8_t *buf, size_t size); 103 104 uint8_t replay_get_byte(void); 105 uint16_t replay_get_word(void); 106 uint32_t replay_get_dword(void); 107 int64_t replay_get_qword(void); 108 void replay_get_array(uint8_t *buf, size_t *size); 109 void replay_get_array_alloc(uint8_t **buf, size_t *size); 110 111 /* Mutex functions for protecting replay log file and ensuring 112 * synchronisation between vCPU and main-loop threads. */ 113 114 void replay_mutex_init(void); 115 bool replay_mutex_locked(void); 116 117 /*! Checks error status of the file. */ 118 void replay_check_error(void); 119 120 /*! Finishes processing of the replayed event and fetches 121 the next event from the log. */ 122 void replay_finish_event(void); 123 /*! Reads data type from the file and stores it in the 124 data_kind variable. */ 125 void replay_fetch_data_kind(void); 126 127 /*! Advance replay_state.current_icount to the specified value. */ 128 void replay_advance_current_icount(uint64_t current_icount); 129 /*! Saves queued events (like instructions and sound). */ 130 void replay_save_instructions(void); 131 132 /*! Skips async events until some sync event will be found. 133 \return true, if event was found */ 134 bool replay_next_event_is(int event); 135 136 /*! Reads next clock value from the file. 137 If clock kind read from the file is different from the parameter, 138 the value is not used. */ 139 void replay_read_next_clock(ReplayClockKind kind); 140 141 /* Asynchronous events queue */ 142 143 /*! Initializes events' processing internals */ 144 void replay_init_events(void); 145 /*! Clears internal data structures for events handling */ 146 void replay_finish_events(void); 147 /*! Returns true if there are any unsaved events in the queue */ 148 bool replay_has_events(void); 149 /*! Saves events from queue into the file */ 150 void replay_save_events(void); 151 /*! Read events from the file into the input queue */ 152 void replay_read_events(void); 153 /*! Adds specified async event to the queue */ 154 void replay_add_event(ReplayAsyncEventKind event_kind, void *opaque, 155 void *opaque2, uint64_t id); 156 157 /* Input events */ 158 159 /*! Saves input event to the log */ 160 void replay_save_input_event(InputEvent *evt); 161 /*! Reads input event from the log */ 162 InputEvent *replay_read_input_event(void); 163 /*! Adds input event to the queue */ 164 void replay_add_input_event(struct InputEvent *event); 165 /*! Adds input sync event to the queue */ 166 void replay_add_input_sync_event(void); 167 168 /* Character devices */ 169 170 /*! Called to run char device read event. */ 171 void replay_event_char_read_run(void *opaque); 172 /*! Writes char read event to the file. */ 173 void replay_event_char_read_save(void *opaque); 174 /*! Reads char event read from the file. */ 175 void *replay_event_char_read_load(void); 176 177 /* Network devices */ 178 179 /*! Called to run network event. */ 180 void replay_event_net_run(void *opaque); 181 /*! Writes network event to the file. */ 182 void replay_event_net_save(void *opaque); 183 /*! Reads network from the file. */ 184 void *replay_event_net_load(void); 185 186 /* VMState-related functions */ 187 188 /* Registers replay VMState. 189 Should be called before virtual devices initialization 190 to make cached timers available for post_load functions. */ 191 void replay_vmstate_register(void); 192 193 #endif