Struct ExtFuncData 

pub struct ExtFuncData {
    pub name: ExternalName,
    pub signature: SigRef,
    pub colocated: bool,
    pub patchable: bool,
}

An external function.

Information about a function that can be called directly with a direct call instruction.

Fields

name: ExternalName

Name of the external function.

signature: SigRef

Call signature of function.

colocated: bool

Will this function be defined nearby, such that it will always be a certain distance away, after linking? If so, references to it can avoid going through a GOT or PLT. Note that symbols meant to be preemptible cannot be considered colocated.

If true, some backends may use relocation forms that have limited range. The exact distance depends on the code model in use. Currently on AArch64, for example, Cranelift uses a custom code model supporting up to +/- 128MB displacements. If it is unknown how far away the target will be, it is best not to set the colocated flag; in general, this flag is best used when the target is known to be in the same unit of code generation, such as a Wasm module.

See the documentation for RelocDistance for more details. A colocated flag value of true implies RelocDistance::Near.

patchable: bool

Is this function “patchable”? If so, calls to this function will emit additional metadata indicating how to patch them in or out.

Calls to functions of any calling convention may be patchable, but only calls with no return values are patchable. This is because every SSA value must always be defined, and return values would not be if the call were patched out.

Implementations

impl ExtFuncData

pub fn display<'a>( &'a self, params: Option<&'a FunctionParameters>, ) -> DisplayableExtFuncData<'a>

Returns a displayable version of the ExtFuncData, with or without extra context to prettify the output.

Trait Implementations

impl Clone for ExtFuncData

fn clone(&self) -> ExtFuncData

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExtFuncData

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ExtFuncData

fn deserialize<__D>( __deserializer: __D, ) -> Result<ExtFuncData, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for ExtFuncData

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

where __H: Hasher,

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 PartialEq for ExtFuncData

fn eq(&self, other: &ExtFuncData) -> 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 Serialize for ExtFuncData

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ExtFuncData