qemu/stubs/replay.c
Pavel Dovgalyuk 878ec29b9c replay: record and replay random number sources
Record/replay feature of icount allows deterministic running of execution
scenarios. Some CPUs and peripheral devices read random numbers from
external sources making deterministic execution impossible.
This patch adds recording and replaying of random read operations
into guest-random module, which is used by the virtual hardware.

Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>
Message-Id: <157675984852.14505.15709141760677102489.stgit@pasha-Precision-3630-Tower>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-01-07 12:08:39 +01:00

91 lines
1.2 KiB
C

#include "qemu/osdep.h"
#include "sysemu/replay.h"
ReplayMode replay_mode;
int64_t replay_save_clock(unsigned int kind, int64_t clock, int64_t raw_icount)
{
abort();
return 0;
}
int64_t replay_read_clock(unsigned int kind)
{
abort();
return 0;
}
bool replay_checkpoint(ReplayCheckpoint checkpoint)
{
return true;
}
bool replay_events_enabled(void)
{
return false;
}
void replay_finish(void)
{
}
void replay_register_char_driver(Chardev *chr)
{
}
void replay_chr_be_write(Chardev *s, uint8_t *buf, int len)
{
abort();
}
void replay_char_write_event_save(int res, int offset)
{
abort();
}
void replay_char_write_event_load(int *res, int *offset)
{
abort();
}
int replay_char_read_all_load(uint8_t *buf)
{
abort();
}
void replay_char_read_all_save_error(int res)
{
abort();
}
void replay_char_read_all_save_buf(uint8_t *buf, int offset)
{
abort();
}
void replay_block_event(QEMUBH *bh, uint64_t id)
{
}
uint64_t blkreplay_next_id(void)
{
return 0;
}
void replay_mutex_lock(void)
{
}
void replay_mutex_unlock(void)
{
}
void replay_save_random(int ret, void *buf, size_t len)
{
}
int replay_read_random(void *buf, size_t len)
{
return 0;
}