Struct cranelift_wasm::DummyEnvironment

pub struct DummyEnvironment {
    pub info: DummyModuleInfo,
    pub func_bytecode_sizes: Vec<usize>,
    // some fields omitted
}

This ModuleEnvironment implementation is a "naïve" one, doing essentially nothing and emitting placeholders when forced to. Don't try to execute code translated for this environment, essentially here for translation debug purposes.

Fields

info: DummyModuleInfo

Module information.

func_bytecode_sizes: Vec<usize>

Vector of wasm bytecode size for each function.

Methods

impl DummyEnvironment

pub fn new(
    config: TargetFrontendConfig,
    return_mode: ReturnMode,
    debug_info: bool
) -> Self

Creates a new DummyEnvironment instance.

pub fn func_env(&self) -> DummyFuncEnvironment

Return a DummyFuncEnvironment for translating functions within this DummyEnvironment.

pub fn get_num_func_imports(&self) -> usize

Return the number of imported functions within this DummyEnvironment.

Trait Implementations

impl<'data> ModuleEnvironment<'data> for DummyEnvironment

fn target_config(&self) -> TargetFrontendConfig

Get the information needed to produce Cranelift IR for the current target.

fn declare_signature(&mut self, sig: Signature)

Declares a function signature to the environment.

fn declare_func_import(
    &mut self,
    sig_index: SignatureIndex,
    module: &'data str,
    field: &'data str
)

Declares a function import to the environment.

fn declare_func_type(&mut self, sig_index: SignatureIndex)

Declares the type (signature) of a local function in the module.

fn declare_global(&mut self, global: Global)

Declares a global to the environment.

fn declare_global_import(
    &mut self,
    global: Global,
    module: &'data str,
    field: &'data str
)

Declares a global import to the environment.

fn declare_table(&mut self, table: Table)

Declares a table to the environment.

fn declare_table_import(
    &mut self,
    table: Table,
    module: &'data str,
    field: &'data str
)

Declares a table import to the environment.

fn declare_table_elements(
    &mut self,
    _table_index: TableIndex,
    _base: Option<GlobalIndex>,
    _offset: usize,
    _elements: Box<[FuncIndex]>
)

Fills a declared table with references to functions in the module.

fn declare_memory(&mut self, memory: Memory)

Declares a memory to the environment

fn declare_memory_import(
    &mut self,
    memory: Memory,
    module: &'data str,
    field: &'data str
)

Declares a memory import to the environment.

fn declare_data_initialization(
    &mut self,
    _memory_index: MemoryIndex,
    _base: Option<GlobalIndex>,
    _offset: usize,
    _data: &'data [u8]
)

Fills a declared memory with bytes at module instantiation.

fn declare_func_export(&mut self, func_index: FuncIndex, name: &'data str)

Declares a function export to the environment.

fn declare_table_export(&mut self, table_index: TableIndex, name: &'data str)

Declares a table export to the environment.

fn declare_memory_export(&mut self, memory_index: MemoryIndex, name: &'data str)

Declares a memory export to the environment.

fn declare_global_export(&mut self, global_index: GlobalIndex, name: &'data str)

Declares a global export to the environment.

fn declare_start_func(&mut self, func_index: FuncIndex)

Declares the optional start function.

fn define_function_body(
    &mut self,
    body_bytes: &'data [u8],
    body_offset: usize
) -> WasmResult<()>

Provides the contents of a function body.

fn reserve_signatures(&mut self, _num: u32)

Provides the number of signatures up front. By default this does nothing, but implementations can use this to preallocate memory if desired.

fn reserve_imports(&mut self, _num: u32)

Provides the number of imports up front. By default this does nothing, but implementations can use this to preallocate memory if desired.

fn finish_imports(&mut self)

Notifies the implementation that all imports have been declared.

fn reserve_func_types(&mut self, _num: u32)

Provides the number of defined functions up front. By default this does nothing, but implementations can use this to preallocate memory if desired.

fn reserve_tables(&mut self, _num: u32)

Provides the number of defined tables up front. By default this does nothing, but implementations can use this to preallocate memory if desired.

fn reserve_memories(&mut self, _num: u32)

Provides the number of defined memories up front. By default this does nothing, but implementations can use this to preallocate memory if desired.

fn reserve_globals(&mut self, _num: u32)

Provides the number of defined globals up front. By default this does nothing, but implementations can use this to preallocate memory if desired.

fn reserve_exports(&mut self, _num: u32)

Provides the number of exports up front. By default this does nothing, but implementations can use this to preallocate memory if desired.

fn finish_exports(&mut self)

Notifies the implementation that all exports have been declared.

fn reserve_table_elements(&mut self, _num: u32)

Provides the number of element initializers up front. By default this does nothing, but implementations can use this to preallocate memory if desired.

fn reserve_data_initializers(&mut self, _num: u32)

Provides the number of data initializers up front. By default this does nothing, but implementations can use this to preallocate memory if desired.