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vmm: Add BreakPoint to VmState

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This commit adds `VmState::BreakPoint` to handle hardware breakpoint.
The VM will enter this state when a breakpoint hits or a debugger
interrupts the execution.

Signed-off-by: Akira Moroo <retrage01@gmail.com>
This commit is contained in:
Akira Moroo 2022-01-30 19:34:33 +09:00 committed by Rob Bradford
parent 9f111388c0
commit f452e51488
1 changed files with 21 additions and 4 deletions
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25
vmm/src/vm.rs
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@ -301,6 +301,7 @@ pub enum VmState {
Running,
Shutdown,
Paused,
BreakPoint,
}
impl VmState {
@ -310,29 +311,33 @@ impl VmState {
VmState::Created | VmState::Shutdown => {
Err(Error::InvalidStateTransition(self, new_state))
}
VmState::Running | VmState::Paused => Ok(()),
VmState::Running | VmState::Paused | VmState::BreakPoint => Ok(()),
},
VmState::Running => match new_state {
VmState::Created | VmState::Running => {
Err(Error::InvalidStateTransition(self, new_state))
}
VmState::Paused | VmState::Shutdown => Ok(()),
VmState::Paused | VmState::Shutdown | VmState::BreakPoint => Ok(()),
},
VmState::Shutdown => match new_state {
VmState::Paused | VmState::Created | VmState::Shutdown => {
VmState::Paused | VmState::Created | VmState::Shutdown | VmState::BreakPoint => {
Err(Error::InvalidStateTransition(self, new_state))
}
VmState::Running => Ok(()),
},
VmState::Paused => match new_state {
VmState::Created | VmState::Paused => {
VmState::Created | VmState::Paused | VmState::BreakPoint => {
Err(Error::InvalidStateTransition(self, new_state))
}
VmState::Running | VmState::Shutdown => Ok(()),
},
VmState::BreakPoint => match new_state {
VmState::Created | VmState::Running => Ok(()),
_ => Err(Error::InvalidStateTransition(self, new_state)),
},
}
}
}
@ -2735,6 +2740,7 @@ mod tests {
assert!(state.valid_transition(VmState::Running).is_ok());
assert!(state.valid_transition(VmState::Shutdown).is_err());
assert!(state.valid_transition(VmState::Paused).is_ok());
assert!(state.valid_transition(VmState::BreakPoint).is_ok());
}
VmState::Running => {
// Check the transitions from Running
@ -2742,6 +2748,7 @@ mod tests {
assert!(state.valid_transition(VmState::Running).is_err());
assert!(state.valid_transition(VmState::Shutdown).is_ok());
assert!(state.valid_transition(VmState::Paused).is_ok());
assert!(state.valid_transition(VmState::BreakPoint).is_ok());
}
VmState::Shutdown => {
// Check the transitions from Shutdown
@ -2749,6 +2756,7 @@ mod tests {
assert!(state.valid_transition(VmState::Running).is_ok());
assert!(state.valid_transition(VmState::Shutdown).is_err());
assert!(state.valid_transition(VmState::Paused).is_err());
assert!(state.valid_transition(VmState::BreakPoint).is_err());
}
VmState::Paused => {
// Check the transitions from Paused
@ -2756,6 +2764,15 @@ mod tests {
assert!(state.valid_transition(VmState::Running).is_ok());
assert!(state.valid_transition(VmState::Shutdown).is_ok());
assert!(state.valid_transition(VmState::Paused).is_err());
assert!(state.valid_transition(VmState::BreakPoint).is_err());
}
VmState::BreakPoint => {
// Check the transitions from Breakpoint
assert!(state.valid_transition(VmState::Created).is_ok());
assert!(state.valid_transition(VmState::Running).is_ok());
assert!(state.valid_transition(VmState::Shutdown).is_err());
assert!(state.valid_transition(VmState::Paused).is_err());
assert!(state.valid_transition(VmState::BreakPoint).is_err());
}
}
}