Struct wasmtime_environ::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_defined_tables: u32,
    pub num_defined_memories: u32,
    pub num_owned_memories: u32,
    pub num_defined_globals: u32,
    pub num_escaped_funcs: u32,
    /* 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_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_escaped_funcs: u32

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

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>

pub fn vmfunction_import_wasm_call(&self) -> u8

The offset of the wasm_call field.

pub fn vmfunction_import_native_call(&self) -> u8

The offset of the native_call field.

pub fn vmfunction_import_array_call(&self) -> u8

The offset of the array_call field.

pub fn vmfunction_import_vmctx(&self) -> u8

The offset of the vmctx field.

pub fn size_of_vmfunction_import(&self) -> u8

Return the size of VMFunctionImport.

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 VMTableImport.

pub fn vmtable_import_from(&self) -> u8

The offset of the from field.

pub fn vmtable_import_vmctx(&self) -> u8

The offset of the vmctx field.

pub fn size_of_vmtable_import(&self) -> u8

Return the size of VMTableImport.

impl<P: PtrSize> VMOffsets<P>

Offsets for VMTableDefinition.

pub fn vmtable_definition_base(&self) -> u8

The offset of the base field.

pub fn vmtable_definition_current_elements(&self) -> u8

The offset of the current_elements field.

pub fn size_of_vmtable_definition_current_elements(&self) -> u8

The size of the current_elements field.

pub fn size_of_vmtable_definition(&self) -> u8

Return the size of VMTableDefinition.

impl<P: PtrSize> VMOffsets<P>

Offsets for VMMemoryImport.

pub fn vmmemory_import_from(&self) -> u8

The offset of the from field.

pub fn vmmemory_import_vmctx(&self) -> u8

The offset of the vmctx field.

pub fn size_of_vmmemory_import(&self) -> u8

Return the size of VMMemoryImport.

impl<P: PtrSize> VMOffsets<P>

Offsets for VMGlobalImport.

pub fn vmglobal_import_from(&self) -> u8

The offset of the from field.

pub fn size_of_vmglobal_import(&self) -> u8

Return the size of VMGlobalImport.

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 for VMContext.

pub fn vmctx_magic(&self) -> u32

Return the offset to the magic value in this VMContext.

pub fn vmctx_runtime_limits(&self) -> u32

Return the offset to the VMRuntimeLimits structure

pub fn vmctx_callee(&self) -> u32

Return the offset to the callee member in this VMContext.

pub fn vmctx_epoch_ptr(&self) -> u32

Return the offset to the *const AtomicU64 epoch-counter pointer.

pub fn vmctx_gc_heap_base(&self) -> u32

Return the offset to the GC heap base in this VMContext.

pub fn vmctx_gc_heap_bound(&self) -> u32

Return the offset to the GC heap bound in this VMContext.

pub fn vmctx_gc_heap_data(&self) -> u32

Return the offset to the *mut T collector-specific data.

This is a pointer that different collectors can use however they see fit.

pub fn vmctx_store(&self) -> u32

The offset of the *const dyn Store member.

pub fn vmctx_type_ids_array(&self) -> u32

The offset of the type_ids array pointer.

pub fn vmctx_imported_functions_begin(&self) -> u32

The offset of the tables array.

pub fn vmctx_imported_tables_begin(&self) -> u32

The offset of the tables array.

pub fn vmctx_imported_memories_begin(&self) -> u32

The offset of the memories array.

pub fn vmctx_imported_globals_begin(&self) -> u32

The offset of the globals array.

pub fn vmctx_tables_begin(&self) -> u32

The offset of the tables array.

pub fn vmctx_memories_begin(&self) -> u32

The offset of the memories array.

pub fn vmctx_owned_memories_begin(&self) -> u32

The offset of the owned_memories array.

pub fn vmctx_globals_begin(&self) -> u32

The offset of the globals array.

pub fn vmctx_func_refs_begin(&self) -> u32

The offset of the func_refs array.

pub fn vmctx_builtin_functions(&self) -> u32

The offset of the builtin functions array.

pub fn size_of_vmctx(&self) -> u32

Return the size of the VMContext allocation.

pub fn vmctx_vmfunction_import(&self, index: FuncIndex) -> u32

Return the offset to VMFunctionImport index index.

pub fn vmctx_vmtable_import(&self, index: TableIndex) -> u32

Return the offset to VMTableImport index index.

pub fn vmctx_vmmemory_import(&self, index: MemoryIndex) -> u32

Return the offset to VMMemoryImport index index.

pub fn vmctx_vmglobal_import(&self, index: GlobalIndex) -> u32

Return the offset to VMGlobalImport index index.

pub fn vmctx_vmtable_definition(&self, index: DefinedTableIndex) -> u32

Return the offset to VMTableDefinition index index.

pub fn vmctx_vmmemory_pointer(&self, index: DefinedMemoryIndex) -> u32

Return the offset to the *mut VMMemoryDefinition at index index.

pub fn vmctx_vmmemory_definition(&self, index: OwnedMemoryIndex) -> u32

Return the offset to the owned VMMemoryDefinition at index index.

pub fn vmctx_vmglobal_definition(&self, index: DefinedGlobalIndex) -> u32

Return the offset to the VMGlobalDefinition index index.

pub fn vmctx_func_ref(&self, index: FuncRefIndex) -> u32

Return the offset to the VMFuncRef for the given function index (either imported or defined).

pub fn vmctx_vmfunction_import_wasm_call(&self, index: FuncIndex) -> u32

Return the offset to the wasm_call field in *const VMFunctionBody index index.

pub fn vmctx_vmfunction_import_native_call(&self, index: FuncIndex) -> u32

Return the offset to the native_call field in *const VMFunctionBody index index.

pub fn vmctx_vmfunction_import_array_call(&self, index: FuncIndex) -> u32

Return the offset to the array_call field in *const VMFunctionBody index index.

pub fn vmctx_vmfunction_import_vmctx(&self, index: FuncIndex) -> u32

Return the offset to the vmctx field in *const VMFunctionBody index index.

pub fn vmctx_vmtable_import_from(&self, index: TableIndex) -> u32

Return the offset to the from field in VMTableImport index index.

pub fn vmctx_vmtable_definition_base(&self, index: DefinedTableIndex) -> u32

Return the offset to the base field in VMTableDefinition index index.

pub fn vmctx_vmtable_definition_current_elements( &self, index: DefinedTableIndex ) -> u32

Return the offset to the current_elements field in VMTableDefinition index index.

pub fn vmctx_vmmemory_import_from(&self, index: MemoryIndex) -> u32

Return the offset to the from field in VMMemoryImport index index.

pub fn vmctx_vmmemory_import_vmctx(&self, index: MemoryIndex) -> u32

Return the offset to the vmctx field in VMMemoryImport index index.

pub fn vmctx_vmmemory_definition_base(&self, index: OwnedMemoryIndex) -> u32

Return the offset to the base field in VMMemoryDefinition index index.

pub fn vmctx_vmmemory_definition_current_length( &self, index: OwnedMemoryIndex ) -> u32

Return the offset to the current_length field in VMMemoryDefinition index index.

pub fn vmctx_vmglobal_import_from(&self, index: GlobalIndex) -> u32

Return the offset to the from field in VMGlobalImport index index.

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.

impl<P: PtrSize> VMOffsets<P>

Offsets for VMGcRefActivationsTable.

These should only be used when the DRC collector is enabled.

pub fn vm_gc_ref_activation_table_next(&self) -> u32

Return the offset for VMGcRefActivationsTable::next.

pub fn vm_gc_ref_activation_table_end(&self) -> u32

Return the offset for VMGcRefActivationsTable::end.

Trait Implementations

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

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

Returns a copy of the value.

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

Performs copy-assignment from source.

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: Copy> Copy for VMOffsets<P>