Struct TracefsOption 

pub struct TracefsOption {
    pub name: Option<String>,
    pub state: Option<i32>,
}

Tracefs options to set directly in the tracefs instance. This is a very niche feature since almost all of the options deal with formatting textual output (the /trace file), which perfetto doesn’t use.

The options with a known use-case:

• event-fork: when using tids_to_trace above, the kernel will automatically add newly spawned descendant threads to the set of TIDs.

Full list of options is available at https://docs.kernel.org/trace/ftrace.html#trace-options.

Note: this is an exclusive feature, see: https://perfetto.dev/docs/learning-more/android#exclusive-tracing-sessions.

Introduced in: perfetto v52. Supported on: Android 25Q3+.

Fields

name: Option<String>

The name of the tracefs option as found in tracefs/trace_options (without the “no” prefix).

state: Option<i32>

Implementations

impl TracefsOption

pub fn name(&self) -> &str

Returns the value of name, or the default value if name is unset.

pub fn state(&self) -> State

Returns the enum value of state, or the default if the field is unset or set to an invalid enum value.

pub fn set_state(&mut self, value: State)

Sets state to the provided enum value.

Trait Implementations

impl Clone for TracefsOption

fn clone(&self) -> TracefsOption

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TracefsOption

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

Formats the value using the given formatter.

impl Default for TracefsOption

fn default() -> Self

Returns the “default value” for a type.

impl Hash for TracefsOption

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Message for TracefsOption

fn encoded_len(&self) -> usize

Returns the encoded length of the message without a length delimiter.

fn clear(&mut self)

Clears the message, resetting all fields to their default.

fn encode(&self, buf: &mut impl BufMut) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message to a buffer.

fn encode_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message to a newly allocated buffer.

fn encode_length_delimited( &self, buf: &mut impl BufMut, ) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message with a length-delimiter to a buffer.

fn encode_length_delimited_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message with a length-delimiter to a newly allocated buffer.

fn decode(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes an instance of the message from a buffer.

fn decode_length_delimited(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes a length-delimited instance of the message from the buffer.

fn merge(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes an instance of the message from a buffer, and merges it into self.

fn merge_length_delimited(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes a length-delimited instance of the message from buffer, and merges it into self.

impl PartialEq for TracefsOption

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for TracefsOption

impl StructuralPartialEq for TracefsOption