Struct mmtk::util::heap::layout::ByteMapMmapper

pub struct ByteMapMmapper { /* fields omitted */ }

Implementations

impl ByteMapMmapper

pub fn new() -> Self

Trait Implementations

impl Debug for ByteMapMmapper

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

Formats the value using the given formatter.

impl Default for ByteMapMmapper

fn default() -> Self

Returns the “default value” for a type.

impl Mmapper for ByteMapMmapper

fn eagerly_mmap_all_spaces(&self, _space_map: &[Address])

Given an address array describing the regions of virtual memory to be used by MMTk, demand zero map all of them if they are not already mapped.

fn mark_as_mapped(&self, start: Address, bytes: usize)

Mark a number of pages as mapped, without making any request to the operating system. Used to mark pages that the VM has already mapped. @param start Address of the first page to be mapped @param bytes Number of bytes to ensure mapped

fn ensure_mapped(
    &self,
    start: Address,
    pages: usize,
    global_metadata_spec_vec: &[SideMetadataSpec],
    local_metadata_spec_vec: &[SideMetadataSpec]
)

Ensure that a range of pages is mmapped (or equivalent). If the pages are not yet mapped, demand-zero map them. Note that mapping occurs at chunk granularity, not page granularity.

fn is_mapped_address(&self, addr: Address) -> bool

Return {@code true} if the given address has been mmapped

@param addr The address in question. @return {@code true} if the given address has been mmapped

fn protect(&self, start: Address, pages: usize)

Mark a number of pages as inaccessible. @param start Address of the first page to be protected @param pages Number of pages to be protected

fn map_metadata(
    &self,
    chunk: Address,
    global_metadata_spec_vec: &[SideMetadataSpec],
    local_metadata_spec_vec: &[SideMetadataSpec]
) -> Result<(), ()>

Map metadata memory for a given chunk