1 /* 2 * replay-snapshot.c 3 * 4 * Copyright (c) 2010-2016 Institute for System Programming 5 * of the Russian Academy of Sciences. 6 * 7 * This work is licensed under the terms of the GNU GPL, version 2 or later. 8 * See the COPYING file in the top-level directory. 9 * 10 */ 11 12 #include "qemu/osdep.h" 13 #include "qapi/error.h" 14 #include "qemu-common.h" 15 #include "sysemu/replay.h" 16 #include "replay-internal.h" 17 #include "sysemu/sysemu.h" 18 #include "monitor/monitor.h" 19 #include "qapi/qmp/qstring.h" 20 #include "qemu/error-report.h" 21 #include "migration/vmstate.h" 22 23 static void replay_pre_save(void *opaque) 24 { 25 ReplayState *state = opaque; 26 state->file_offset = ftell(replay_file); 27 } 28 29 static int replay_post_load(void *opaque, int version_id) 30 { 31 ReplayState *state = opaque; 32 fseek(replay_file, state->file_offset, SEEK_SET); 33 /* If this was a vmstate, saved in recording mode, 34 we need to initialize replay data fields. */ 35 replay_fetch_data_kind(); 36 37 return 0; 38 } 39 40 static const VMStateDescription vmstate_replay = { 41 .name = "replay", 42 .version_id = 1, 43 .minimum_version_id = 1, 44 .pre_save = replay_pre_save, 45 .post_load = replay_post_load, 46 .fields = (VMStateField[]) { 47 VMSTATE_INT64_ARRAY(cached_clock, ReplayState, REPLAY_CLOCK_COUNT), 48 VMSTATE_UINT64(current_step, ReplayState), 49 VMSTATE_INT32(instructions_count, ReplayState), 50 VMSTATE_UINT32(data_kind, ReplayState), 51 VMSTATE_UINT32(has_unread_data, ReplayState), 52 VMSTATE_UINT64(file_offset, ReplayState), 53 VMSTATE_UINT64(block_request_id, ReplayState), 54 VMSTATE_END_OF_LIST() 55 }, 56 }; 57 58 void replay_vmstate_register(void) 59 { 60 vmstate_register(NULL, 0, &vmstate_replay, &replay_state); 61 } 62 63 void replay_vmstate_init(void) 64 { 65 if (replay_snapshot) { 66 if (replay_mode == REPLAY_MODE_RECORD) { 67 if (save_vmstate(cur_mon, replay_snapshot) != 0) { 68 error_report("Could not create snapshot for icount record"); 69 exit(1); 70 } 71 } else if (replay_mode == REPLAY_MODE_PLAY) { 72 if (load_vmstate(replay_snapshot) != 0) { 73 error_report("Could not load snapshot for icount replay"); 74 exit(1); 75 } 76 } 77 } 78 } 79