Expand description

The wasmer-compiler crate provides the necessary abstractions to create a compiler.

It provides an universal way of parsing a module via wasmparser, while giving the responsibility of compiling specific function WebAssembly bodies to the Compiler implementation.


The result of compiling a WebAssembly module’s functions.

The required info for compiling a module.

The result of compiling a WebAssembly function.

The frame info for a Compiled function.

A Section for a Compilation.

The DWARF information for this Compilation.

Controls which experimental features will be enabled. Features usually have a corresponding WebAssembly proposal.

Function and its instructions addresses mappings.

The function body.

Single source location to generated address mapping.

An opaque reference to a jump table.

A error in the middleware.

A record of a relocation to perform.

The bytes in the section.

Index type of a Section defined inside a WebAssembly Compilation.

A source location.

This is the target that we will use for compiling the WebAssembly ModuleInfo, and then run it.

Trampolines section used by ARM short jump (26bits)

Information about trap.

A target “triple”. Historically such things had three fields, though they’ve added additional fields over time.


The “architecture” field, which in some cases also specifies a specific subarchitecture.

The “binary format” field, which is usually omitted, and the binary format is implied by the other fields.

The calling convention, which specifies things like which registers are used for passing arguments, which registers are callee-saved, and so on.

The WebAssembly.CompileError object indicates an error during WebAssembly decoding or validation.

Compiled function unwind information.

The nomenclature is inspired by the cpuid crate. The list of supported features was initially retrieved from cranelift-native.

Custom section Protection.

The target memory endianness.

The “operating system” field, which sometimes implies an environment, and sometimes isn’t an actual operating system.

The error that can happen while parsing a str to retrieve a CpuFeature.

The width of a pointer (in the default address space).

Relocation kinds for every ISA.

Destination function. Can be either user function or some special one, like memory.grow.

A WebAssembly translation error.


Version number of this crate.

Type Definitions

Addend to add to the symbol value.

Offset in bytes from the beginning of the function.

The custom sections for a Compilation.

The compiled functions map (index in the Wasm -> function)

Code offsets for Jump Tables.

Relocations to apply to function bodies.

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