Struct fvm::call_manager::backtrace::Backtrace
source · pub struct Backtrace {
pub frames: Vec<Frame>,
pub cause: Option<Cause>,
}
Expand description
A call backtrace records the actors an error was propagated through, from the moment it was emitted. The original error is the cause. Backtraces are useful for identifying the root cause of an error.
Fields§
§frames: Vec<Frame>
The actors through which this error was propagated from bottom (source) to top.
cause: Option<Cause>
The last syscall error before the first actor in frames
aborted.
Implementations§
source§impl Backtrace
impl Backtrace
sourcepub fn begin(&mut self, cause: Cause)
pub fn begin(&mut self, cause: Cause)
Begins a new backtrace. If there is an existing backtrace, this will clear it.
Note: Backtraces are populated backwards. That is, a frame is inserted
every time an actor returns. That’s why begin()
resets any currently
accumulated state, as once an error occurs, we want to track its
propagation all the way up.
sourcepub fn set_cause(&mut self, cause: Cause)
pub fn set_cause(&mut self, cause: Cause)
Sets the cause of a backtrace.
This is useful to stamp a backtrace with its cause after the frames have been collected, such as when we ultimately handle a fatal error at the top of its propagation chain.
sourcepub fn push_frame(&mut self, frame: Frame)
pub fn push_frame(&mut self, frame: Frame)
Push a “frame” (actor exit) onto the backtrace.
This should be called every time an actor exits with an error.
Trait Implementations§
Auto Trait Implementations§
impl Freeze for Backtrace
impl RefUnwindSafe for Backtrace
impl Send for Backtrace
impl Sync for Backtrace
impl Unpin for Backtrace
impl UnwindSafe for Backtrace
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