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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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7
vl.c
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@ -465,6 +465,9 @@ static QemuOptsList qemu_icount_opts = {
}, {
.name = "rrfile",
.type = QEMU_OPT_STRING,
}, {
.name = "rrsnapshot",
.type = QEMU_OPT_STRING,
},
{ /* end of list */ }
},
@ -4634,7 +4637,9 @@ int main(int argc, char **argv, char **envp)
replay_checkpoint(CHECKPOINT_RESET);
qemu_system_reset(VMRESET_SILENT);
register_global_state();
if (loadvm) {
if (replay_mode != REPLAY_MODE_NONE) {
replay_vmstate_init();
} else if (loadvm) {
if (load_vmstate(loadvm) < 0) {
autostart = 0;
}