Struct wasmtime_jit::CodeMemory

pub struct CodeMemory { /* private fields */ }

Management of executable memory within a MmapVec

This type consumes ownership of a region of memory and will manage the executable permissions of the contained JIT code as necessary.

Implementations

impl CodeMemory

pub fn new(mmap: MmapVec) -> Self

Creates a new CodeMemory by taking ownership of the provided MmapVec.

The returned CodeMemory manages the internal MmapVec and the publish method is used to actually make the memory executable.

pub fn mmap(&self) -> &MmapVec

Returns a reference to the underlying MmapVec this memory owns.

pub fn publish(&mut self) -> Result<Publish<'_>>

Publishes the internal ELF image to be ready for execution.

This method can only be called once and will panic if called twice. This will parse the ELF image from the original MmapVec and do everything necessary to get it ready for execution, including:

• Change page protections from read/write to read/execute.
• Register unwinding information with the OS

After this function executes all JIT code should be ready to execute. The various parsed results of the internals of the MmapVec are returned through the Publish structure.

Trait Implementations

impl Drop for CodeMemory

fn drop(&mut self)

Executes the destructor for this type.