qemu/stubs/replay-tools.c
Pavel Dovgalyuk 366a85e4bb replay: fix icount request when replaying clock access
Record/replay provides REPLAY_CLOCK_LOCKED macro to access
the clock when vm_clock_seqlock is locked. This macro is
needed because replay internals operate icount. In locked case
replay use icount_get_raw_locked for icount request, which prevents
excess locking which leads to deadlock. But previously only
record code used *_locked function and replay did not.
Therefore sometimes clock access lead to deadlocks.
This patch fixes clock access for replay too and uses *_locked
icount access function.

Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgalyuk@ispras.ru>
Message-Id: <161347990483.1313189.8371838968343494161.stgit@pasha-ThinkPad-X280>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-02-16 17:15:39 +01:00

84 lines
1.2 KiB
C

#include "qemu/osdep.h"
#include "sysemu/replay.h"
#include "block/aio.h"
bool replay_events_enabled(void)
{
return false;
}
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, int64_t raw_icount)
{
abort();
return 0;
}
uint64_t replay_get_current_icount(void)
{
return 0;
}
void replay_bh_schedule_event(QEMUBH *bh)
{
qemu_bh_schedule(bh);
}
void replay_bh_schedule_oneshot_event(AioContext *ctx,
QEMUBHFunc *cb, void *opaque)
{
aio_bh_schedule_oneshot(ctx, cb, opaque);
}
bool replay_checkpoint(ReplayCheckpoint checkpoint)
{
return true;
}
void replay_mutex_lock(void)
{
}
void replay_mutex_unlock(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();
}