Struct wasmer_vm::VMOffsets

pub struct VMOffsets {
    pub pointer_size: u8,
    pub num_signature_ids: u32,
    pub num_imported_functions: u32,
    pub num_imported_tables: u32,
    pub num_imported_memories: u32,
    pub num_imported_globals: u32,
    pub num_local_tables: u32,
    pub num_local_memories: u32,
    pub num_local_globals: u32,
    pub has_trap_handlers: bool,
}

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

Fields

pointer_size: u8

The size in bytes of a pointer on the target.

num_signature_ids: u32

The number of signature declarations in the module.

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_local_tables: u32

The number of defined tables in the module.

num_local_memories: u32

The number of defined memories in the module.

num_local_globals: u32

The number of defined globals in the module.

has_trap_handlers: bool

If the module has trap handler.

Implementations

impl VMOffsets

pub fn new(pointer_size: u8, module: &ModuleInfo) -> Self

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

pub fn new_for_trampolines(pointer_size: u8) -> Self

Return a new VMOffsets instance, for a given pointer size skipping the ModuleInfo.

Note: This should only when generating code for trampolines.

impl VMOffsets

Offsets for VMFunctionImport.

pub const fn vmfunction_import_body(&self) -> u8

The offset of the body field.

pub const fn vmfunction_import_vmctx(&self) -> u8

The offset of the vmctx field.

pub const fn size_of_vmfunction_import(&self) -> u8

Return the size of VMFunctionImport.

impl VMOffsets

Offsets for VMDynamicFunctionContext.

pub const fn vmdynamicfunction_import_context_address(&self) -> u8

The offset of the address field.

pub const fn vmdynamicfunction_import_context_ctx(&self) -> u8

The offset of the ctx field.

pub const fn size_of_vmdynamicfunction_import_context(&self) -> u8

Return the size of VMDynamicFunctionContext.

impl VMOffsets

Offsets for *const VMFunctionBody.

pub const fn size_of_vmfunction_body_ptr(&self) -> u8

The size of the current_elements field.

impl VMOffsets

Offsets for VMTableImport.

pub const fn vmtable_import_definition(&self) -> u8

The offset of the definition field.

pub const fn vmtable_import_from(&self) -> u8

The offset of the from field.

pub const fn size_of_vmtable_import(&self) -> u8

Return the size of VMTableImport.

impl VMOffsets

Offsets for VMTableDefinition.

pub const fn vmtable_definition_base(&self) -> u8

The offset of the base field.

pub const fn vmtable_definition_current_elements(&self) -> u8

The offset of the current_elements field.

pub const fn size_of_vmtable_definition_current_elements(&self) -> u8

The size of the current_elements field.

pub const fn size_of_vmtable_definition(&self) -> u8

Return the size of VMTableDefinition.

impl VMOffsets

Offsets for VMMemoryImport.

pub const fn vmmemory_import_definition(&self) -> u8

The offset of the from field.

pub const fn vmmemory_import_from(&self) -> u8

The offset of the from field.

pub const fn size_of_vmmemory_import(&self) -> u8

Return the size of VMMemoryImport.

impl VMOffsets

Offsets for VMMemoryDefinition.

pub const fn vmmemory_definition_base(&self) -> u8

The offset of the base field.

pub const fn vmmemory_definition_current_length(&self) -> u8

The offset of the current_length field.

pub const fn size_of_vmmemory_definition_current_length(&self) -> u8

The size of the current_length field.

pub const fn size_of_vmmemory_definition(&self) -> u8

Return the size of VMMemoryDefinition.

impl VMOffsets

Offsets for VMGlobalImport.

pub const fn vmglobal_import_definition(&self) -> u8

The offset of the definition field.

pub const fn vmglobal_import_from(&self) -> u8

The offset of the from field.

pub const fn size_of_vmglobal_import(&self) -> u8

Return the size of VMGlobalImport.

impl VMOffsets

Offsets for a non-null pointer to a VMGlobalDefinition used as a local global.

pub const fn size_of_vmglobal_local(&self) -> u8

Return the size of a pointer to a VMGlobalDefinition;

The underlying global itself is the size of the largest value type (i.e. a V128), however the size of this type is just the size of a pointer.

impl VMOffsets

Offsets for VMSharedSignatureIndex.

pub const fn size_of_vmshared_signature_index(&self) -> u8

Return the size of VMSharedSignatureIndex.

impl VMOffsets

Offsets for VMCallerCheckedAnyfunc.

pub const fn vmcaller_checked_anyfunc_func_ptr(&self) -> u8

The offset of the func_ptr field.

pub const fn vmcaller_checked_anyfunc_type_index(&self) -> u8

The offset of the type_index field.

pub const fn vmcaller_checked_anyfunc_vmctx(&self) -> u8

The offset of the vmctx field.

pub const fn size_of_vmcaller_checked_anyfunc(&self) -> u8

Return the size of VMCallerCheckedAnyfunc.

impl VMOffsets

Offsets for VMFuncRef.

pub const fn vm_funcref_anyfunc_ptr(&self) -> u8

The offset to the pointer to the anyfunc inside the ref.

pub const fn size_of_vm_funcref(&self) -> u8

Return the size of VMFuncRef.

impl VMOffsets

Offsets for VMContext.

pub fn vmctx_signature_ids_begin(&self) -> u32

The offset of the signature_ids array.

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_globals_begin(&self) -> u32

The offset of the globals array.

pub fn vmctx_builtin_functions_begin(&self) -> u32

The offset of the builtin functions array.

pub fn vmctx_trap_handler_begin(&self) -> u32

The offset of the trap handler.

pub fn vmctx_gas_limiter_pointer(&self) -> u32

The offset of the gas limiter pointer.

pub fn size_of_vmctx(&self) -> u32

Return the size of the VMContext allocation.

pub fn vmctx_vmshared_signature_id(&self, index: SignatureIndex) -> u32

Return the offset to VMSharedSignatureIndex index index.

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

Return the offset to VMTableDefinition index index.

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

Return the offset to VMMemoryDefinition index index.

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

Return the offset to the VMGlobalDefinition index index.

pub fn vmctx_vmfunction_import_body(&self, index: FunctionIndex) -> u32

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

pub fn vmctx_builtin_function(&self, index: VMBuiltinFunctionIndex) -> u32

Return the offset to builtin function in VMBuiltinFunctionsArray index index.

pub fn vmctx_trap_handler(&self) -> u32

Return the offset to the trap handler.

Trait Implementations

impl Clone for VMOffsets

fn clone(&self) -> VMOffsets

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for VMOffsets

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

Formats the value using the given formatter.

impl MemoryUsage for VMOffsets

fn size_of_val(&self, visited: &mut dyn MemoryUsageTracker) -> usize

Returns the size of the referenced value in bytes.