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replay: save/load initial state

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This patch implements initial vmstate creation or loading at the start
of record/replay. It is needed for rewinding the execution in the replay mode.

v4 changes:
 - snapshots are not created by default anymore

v3 changes:
 - added rrsnapshot option

Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Message-Id: <20170124071746.4572.61449.stgit@PASHA-ISP>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Pavel Dovgalyuk 2017-01-24 10:17:47 +03:00 • committed by Paolo Bonzini
parent ac8c19ba74
commit 9c2037d0a4
6 changed files with 59 additions and 3 deletions
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9
include/sysemu/replay.h
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@ -43,6 +43,9 @@ typedef struct ReplayNetState ReplayNetState;
extern ReplayMode replay_mode;
/* Name of the initial VM snapshot */
extern char *replay_snapshot;
/* Replay process control functions */
/*! Enables recording or saving event log with specified parameters */
@ -149,4 +152,10 @@ void replay_unregister_net(ReplayNetState *rns);
void replay_net_packet_event(ReplayNetState *rns, unsigned flags,
const struct iovec *iov, int iovcnt);
/* VM state operations */
/*! Called at the start of execution.
Loads or saves initial vmstate depending on execution mode. */
void replay_vmstate_init(void);
#endif