Struct VMOffsets 

pub struct VMOffsets<P> {

    pub ptr: P,
    pub num_imported_functions: u32,
    pub num_imported_tables: u32,
    pub num_imported_memories: u32,
    pub num_imported_globals: u32,
    pub num_imported_tags: u32,
    pub num_defined_tables: u32,
    pub num_defined_memories: u32,
    pub num_owned_memories: u32,
    pub num_defined_globals: u32,
    pub num_defined_tags: u32,
    pub num_escaped_funcs: u32,
    pub num_runtime_data: u32,
    pub has_startup_func: bool,
    /* private fields */
}

This class computes offsets to fields within VMContext and other related structs that JIT code accesses directly.

Fields

ptr: P

The size in bytes of a pointer on the target.

num_imported_functions: u32

The number of imported functions in the module.

num_imported_tables: u32

The number of imported tables in the module.

num_imported_memories: u32

The number of imported memories in the module.

num_imported_globals: u32

The number of imported globals in the module.

num_imported_tags: u32

The number of imported tags in the module.

num_defined_tables: u32

The number of defined tables in the module.

num_defined_memories: u32

The number of defined memories in the module.

num_owned_memories: u32

The number of memories owned by the module instance.

num_defined_globals: u32

The number of defined globals in the module.

num_defined_tags: u32

The number of defined tags in the module.

num_escaped_funcs: u32

The number of escaped functions in the module, the size of the func_refs array.

num_runtime_data: u32

The number of runtime data segments in the module.

has_startup_func: bool

Whether or not the module has a start function.

Implementations

impl<P: PtrSize> VMOffsets<P>

pub fn new(ptr: P, module: &Module) -> Self

Return a new VMOffsets instance, for a given pointer size.

pub fn pointer_size(&self) -> u8

Returns the size, in bytes, of the target

pub fn region_sizes(&self) -> impl Iterator<Item = (&str, u32)>

Returns an iterator which provides a human readable description and a byte size. The iterator returned will iterate over the bytes allocated to the entire VMOffsets structure to explain where each byte size is coming from.

impl<P: PtrSize> VMOffsets<P>

Offsets for *const VMFunctionBody.

pub fn size_of_vmfunction_body_ptr(&self) -> u8

The size of the current_elements field.

impl<P: PtrSize> VMOffsets<P>

Offsets for VMTableDefinition.

pub fn size_of_vmtable_definition_current_elements(&self) -> u8

The size of the current_elements field.

impl<P: PtrSize> VMOffsets<P>

Offsets for VMSharedTypeIndex.

pub fn size_of_vmshared_type_index(&self) -> u8

Return the size of VMSharedTypeIndex.

impl<P: PtrSize> VMOffsets<P>

Offsets of the dynamically-positioned fields of VMContext.

pub fn imported_memories(&self) -> ArrayOffsets<MemoryIndex>

The offsets of the imported_memories array.

pub fn memories(&self) -> ArrayOffsets<DefinedMemoryIndex>

The offsets of the memories array.

pub fn owned_memories(&self) -> ArrayOffsets<OwnedMemoryIndex>

The offsets of the owned_memories array.

pub fn imported_functions(&self) -> ArrayOffsets<FuncIndex>

The offsets of the imported_functions array.

pub fn imported_tables(&self) -> ArrayOffsets<TableIndex>

The offsets of the imported_tables array.

pub fn imported_globals(&self) -> ArrayOffsets<GlobalIndex>

The offsets of the imported_globals array.

pub fn imported_tags(&self) -> ArrayOffsets<TagIndex>

The offsets of the imported_tags array.

pub fn tables(&self) -> ArrayOffsets<DefinedTableIndex>

The offsets of the tables array.

pub fn globals(&self) -> ArrayOffsets<DefinedGlobalIndex>

The offsets of the globals array.

pub fn tags(&self) -> ArrayOffsets<DefinedTagIndex>

The offsets of the tags array.

pub fn func_refs(&self) -> ArrayOffsets<FuncRefIndex>

The offsets of the func_refs array.

pub fn startup_func_ref(&self) -> u32

The offset of the startup_func_ref field.

Panics if has_startup_func is false, in which case this field is not present at all.

pub fn runtime_data_bases(&self) -> ArrayOffsets<RuntimeDataIndex>

The offsets of the runtime_data_bases array.

pub fn runtime_data_lengths(&self) -> ArrayOffsets<RuntimeDataIndex>

The offsets of the runtime_data_lengths array.

pub fn size_of_vmctx(&self) -> u32

Return the size of the VMContext allocation.

impl<P: PtrSize> VMOffsets<P>

Offsets for VMGcHeader.

pub fn vm_gc_header_kind(&self) -> u32

Return the offset for the VMGcHeader::kind field.

pub fn vm_gc_header_reserved_bits(&self) -> u32

Return the offset for the VMGcHeader’s reserved bits.

pub fn vm_gc_header_ty(&self) -> u32

Return the offset for the VMGcHeader::ty field.

impl<P: PtrSize> VMOffsets<P>

Offsets for VMDrcHeader.

Should only be used when the DRC collector is enabled.

pub fn vm_drc_header_ref_count(&self) -> u32

Return the offset for VMDrcHeader::ref_count.

pub fn vm_drc_header_next_over_approximated_stack_root(&self) -> u32

Return the offset for VMDrcHeader::next_over_approximated_stack_root.

Trait Implementations

impl<P: Clone> Clone for VMOffsets<P>

fn clone(&self) -> VMOffsets<P>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<P: Copy> Copy for VMOffsets<P>

impl<P: Debug> Debug for VMOffsets<P>

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

Formats the value using the given formatter.

impl<P: PtrSize> From<VMOffsetsFields<P>> for VMOffsets<P>

fn from(fields: VMOffsetsFields<P>) -> VMOffsets<P>

Converts to this type from the input type.

impl<P: PtrSize> GetPtrSize for VMOffsets<P>

type Ptr = P

The type that implements PtrSize.

fn get_ptr_size(&self) -> &Self::Ptr

Get a &P where P: PtrSize.