33577b47c6
This patch implements record and replay of character devices. It records chardevs communication in replay mode. Recorded information include data read from backend and counter of bytes written from frontend to backend to preserve frontend internal state. If character device was configured through the command line in record mode, then in replay mode it should be also added to command line. Backend of the character device could be changed in replay mode. Replaying of devices that perform ioctl and get_msgfd operations is not supported. gdbstub which also acts as a backend is not recorded to allow controlling the replaying through gdb. Monitor backends are also not recorded. Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru> Message-Id: <20160314074436.4980.83856.stgit@PASHA-ISP> [Add stubs. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
66 lines
931 B
C
66 lines
931 B
C
#include "qemu/osdep.h"
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#include "sysemu/replay.h"
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#include "sysemu/sysemu.h"
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ReplayMode replay_mode;
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int64_t replay_save_clock(unsigned int kind, int64_t clock)
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{
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abort();
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return 0;
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}
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int64_t replay_read_clock(unsigned int kind)
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{
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abort();
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return 0;
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}
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bool replay_checkpoint(ReplayCheckpoint checkpoint)
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{
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return true;
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}
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bool replay_events_enabled(void)
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{
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return false;
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}
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void replay_finish(void)
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{
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}
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void replay_register_char_driver(CharDriverState *chr)
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{
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}
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void replay_chr_be_write(CharDriverState *s, uint8_t *buf, int len)
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{
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abort();
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}
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void replay_char_write_event_save(int res, int offset)
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{
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abort();
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}
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void replay_char_write_event_load(int *res, int *offset)
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{
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abort();
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}
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int replay_char_read_all_load(uint8_t *buf)
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{
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abort();
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}
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void replay_char_read_all_save_error(int res)
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{
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abort();
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}
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void replay_char_read_all_save_buf(uint8_t *buf, int offset)
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{
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abort();
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}
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