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SyscallHistogram

detcore_model::syscall_histogram

Struct SyscallHistogram 

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pub struct SyscallHistogram { /* private fields */ }
Expand description

A histogram indexed by x86-64 syscall number, as Detcore collects it: a dense array with one SyscallOutcomes per table slot, allocated once when the thread’s state is created, so counting a syscall is two array increments with no allocation and no lookup. A thread that exits hands over only its nonzero slots (SparseSyscallHistogram), and the run’s total sums those back into one dense histogram.

It serializes sparsely, as (number, counts) pairs for the nonzero slots in ascending order, so the thread-exit message and any saved thread state stay small.

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impl SyscallHistogram

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pub fn enter(&mut self, sysno: Sysno)

Count one entry of sysno.

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pub fn finish(&mut self, sysno: Sysno, outcome: SyscallOutcome)

Record the outcome of one completed call of sysno.

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pub fn merge(&mut self, other: &SyscallHistogram)

Add every count of other to this histogram.

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pub fn total_calls(&self) -> u64

Total entries over every syscall.

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pub fn is_empty(&self) -> bool

Whether nothing has been counted.

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pub fn get(&self, sysno: Sysno) -> Option<&SyscallOutcomes>

The counts of one syscall, if it was counted.

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pub fn summary( &self, observation_scope: SyscallObservationScope, ) -> SyscallHistogramSummary

The run-summary form of this histogram, with its observation scope: only the nonzero slots. A number without a name in the x86-64 table is reported as syscall_<number>.

Trait Implementations§

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impl Clone for SyscallHistogram

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fn clone(&self) -> SyscallHistogram

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for SyscallHistogram

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Default for SyscallHistogram

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl<'de> Deserialize<'de> for SyscallHistogram

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fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error>

Deserialize this value from the given Serde deserializer. Read more
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impl Eq for SyscallHistogram

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impl From<&SyscallHistogram> for SparseSyscallHistogram

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fn from(histogram: &SyscallHistogram) -> Self

Converts to this type from the input type.
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impl PartialEq for SyscallHistogram

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fn eq(&self, other: &SyscallHistogram) -> bool

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=. Read more
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impl Serialize for SyscallHistogram

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fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer. Read more
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impl StructuralPartialEq for SyscallHistogram

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