Crate cranelift_wasm

Performs translation from a wasm module in binary format to the in-memory form of Cranelift IR. More particularly, it translates the code of all the functions bodies and interacts with an environment implementing the ModuleEnvironment trait to deal with tables, globals and linear memory.

The crate provides a DummyEnvironment struct that will allow to translate the code of the functions but will fail at execution.

The main function of this module is translate_module.

Macros

wasm_unsupported

Return an Err(WasmError::Unsupported(msg)) where msg the string built by calling format! on the arguments to this macro.

Structs

DataIndex	Index type of a passive data segment inside the WebAssembly module.
DefinedFuncIndex	Index type of a defined function inside the WebAssembly module.
DefinedGlobalIndex	Index type of a defined global inside the WebAssembly module.
DefinedMemoryIndex	Index type of a defined memory inside the WebAssembly module.
DefinedTableIndex	Index type of a defined table inside the WebAssembly module.
DummyEnvironment	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.
ElemIndex	Index type of a passive element segment inside the WebAssembly module.
FuncIndex	Index type of a function (imported or defined) inside the WebAssembly module.
FuncTranslationState	Contains information passed along during a function’s translation and that records:
FuncTranslator	WebAssembly to Cranelift IR function translator.
FunctionBuilder	Temporary object used to build a single Cranelift IR Function.
Global	A WebAssembly global.
GlobalIndex	Index type of a global variable (imported or defined) inside the WebAssembly module.
Memory	WebAssembly linear memory.
MemoryIndex	Index type of a linear memory (imported or defined) inside the WebAssembly module.
ModuleTranslationState	Contains information decoded from the Wasm module that must be referenced during each Wasm function’s translation.
SignatureIndex	Index type of a signature (imported or defined) inside the WebAssembly module.
Table	WebAssembly table.
TableIndex	Index type of a table (imported or defined) inside the WebAssembly module.
WasmFuncType	WebAssembly function type – equivalent of wasmparser’s FuncType.

Enums

GlobalInit	Globals are initialized via the const operators or by referring to another import.
GlobalVariable	The value of a WebAssembly global variable.
ReturnMode	How to return from functions.
TableElementType	WebAssembly table element. Can be a function or a scalar type.
WasmError	A WebAssembly translation error.
WasmType	WebAssembly value type – equivalent of wasmparser’s Type.

Constants

VERSION

Version number of this crate.

Traits

FuncEnvironment	Environment affecting the translation of a single WebAssembly function.
ModuleEnvironment	An object satisfying the ModuleEnvironment trait can be passed as argument to the translate_module function. These methods should not be called by the user, they are only for cranelift-wasm internal use.
TargetEnvironment	Environment affecting the translation of a WebAssembly.

Functions

get_vmctx_value_label	Special VMContext value label. It is tracked as 0xffff_fffe label.
translate_module	Translate a sequence of bytes forming a valid Wasm binary into a list of valid Cranelift IR Function.

Type Definitions

WasmResult

A convenient alias for a Result that uses WasmError as the error type.