Crate wasmtime_environ

Standalone environment for WebAssembly using Cranelift. Provides functions to translate get_global, set_global, memory.size, memory.grow, call_indirect that hardcode in the translation the base addresses of regions of memory that will hold the globals, tables and linear memories.

Re-exports

pub use crate::cranelift::Cranelift;

Modules

cranelift	Support for compiling with Cranelift.
entity
ir
isa
settings
wasm

Macros

for_each_libcall

Iterates through all LibCall members and all runtime exported functions.

Structs

BuiltinFunctionIndex	An index type for builtin functions.
CacheConfig	Global configuration for how the cache is managed
Compilation	The result of compiling a WebAssembly module’s functions.
CompiledFunction	Compiled function: machine code body, jump table offsets, and unwind information.
DataInitializer	A data initializer for linear memory.
DataInitializerLocation	A memory index and offset within that memory where a data initialization should is to be performed.
FunctionAddressMap	Function and its instructions addresses mappings.
FunctionBodyData	Contains function data: byte code and its offset in the module.
InstructionAddressMap	Single source location to generated address mapping.
MemoryPlan	A WebAssembly linear memory description along with our chosen style for implementing it.
Module	A translated WebAssembly module, excluding the function bodies and memory initializers.
ModuleEnvironment	Object containing the standalone environment information.
ModuleLocal	Local information known about a wasm module, the bare minimum necessary to translate function bodies.
ModuleTranslation	The result of translating via ModuleEnvironment. Function bodies are not yet translated, and data initializers have not yet been copied out of the original buffer.
ModuleVmctxInfo	Module vmctx related info.
Relocation	A record of a relocation to perform.
StackMapInformation	The offset within a function of a GC safepoint, and its associated stack map.
TableElements	A WebAssembly table initializer.
TablePlan	A WebAssembly table description along with our chosen style for implementing it.
TargetSharedSignatureIndex	Target specific type for shared signature index.
TrapInformation	Information about trap.
Tunables	Tunable parameters for WebAssembly compilation.
VMOffsets	This class computes offsets to fields within VMContext and other related structs that JIT code accesses directly.

Enums

CompileError	An error while compiling WebAssembly to machine code.
EntityIndex	An index of an entity.
MemoryStyle	Implemenation styles for WebAssembly linear memory.
ModuleMemoryOffset	Memory definition offset in the VMContext structure.
RelocationTarget	Destination function. Can be either user function or some special one, like memory.grow.
TableStyle	Implemenation styles for WebAssembly tables.

Constants

INTERRUPTED	Sentinel value indicating that wasm has been interrupted.
VERSION	Version number of this crate.
WASM_MAX_PAGES	The number of pages we can have before we run out of byte index space.
WASM_PAGE_SIZE	WebAssembly page sizes are defined to be 64KiB.

Traits

Compiler

An implementation of a compiler from parsed WebAssembly module to native code.

Functions

cache_create_new_config	Creates a new configuration file at specified path, or default path if None is passed. Fails if file already exists.
translate_signature	Add environment-specific function parameters.

Type Definitions

ModuleAddressMap	Module functions addresses mappings.
Relocations	Relocations to apply to function bodies.
StackMaps	Information about GC safepoints and their associated stack maps within each function.
Traps	Information about traps associated with the functions where the traps are placed.
ValueLabelsRanges	Value ranges for functions.