Crate wasmer_vm

Runtime library support for Wasmer.

Modules

libcalls

Runtime library calls.

Structs

ExportsIterator	This iterator allows us to iterate over the exports and offer nice API ergonomics over it.
FuncDataRegistry	The registry that holds the values that VMFuncRefs point to.
FunctionBodyPtr	A safe wrapper around VMFunctionBody.
Global	A Global instance
Imports	Resolved import pointers.
ImportsIterator	This iterator allows us to iterate over the imports and offer nice API ergonomics over it.
InstanceAllocator	This is an intermediate type that manages the raw allocation and metadata when creating an [Instance].
InstanceHandle	A handle holding an InstanceRef, which holds an Instance of a WebAssembly module.
LinearMemory	A linear memory instance.
LinearTable	A table instance.
Mmap	A simple struct consisting of a page-aligned pointer to page-aligned and initially-zeroed memory and a length.
ModuleInfo	A translated WebAssembly module, excluding the function bodies and memory initializers.
SectionBodyPtr	Pointers to section data.
SignatureRegistry	WebAssembly requires that the caller and callee signatures in an indirect call must match. To implement this efficiently, keep a registry of all signatures, shared by all instances, so that call sites can just do an index comparison.
TargetSharedSignatureIndex	Target specific type for shared signature index.
TlsRestore	Opaque state used to help control TLS state across stack switches for async support.
VMBuiltinFunctionIndex	An index type for builtin functions.
VMCallerCheckedAnyfunc	The VM caller-checked “anyfunc” record, for caller-side signature checking. It consists of the actual function pointer and a signature id to be checked by the caller.
VMContext	The VM “context”, which is pointed to by the vmctx arg in the compiler. This has information about globals, memories, tables, and other runtime state associated with the current instance.
VMDynamicFunctionContext	The VMDynamicFunctionContext is the context that dynamic functions will receive when called (rather than vmctx). A dynamic function is a function for which we don’t know the signature until runtime.
VMExternRef	This type does not do reference counting automatically, reference counting can be done with Self::ref_clone and Self::ref_drop.
VMFuncRef	A function reference. A single word that points to metadata about a function.
VMFunction	A function export value.
VMFunctionBody	A placeholder byte-sized type which is just used to provide some amount of type safety when dealing with pointers to JIT-compiled function bodies. Note that it’s deliberately not Copy, as we shouldn’t be carelessly copying function body bytes around.
VMFunctionImport	An imported function.
VMGlobal	A global export value.
VMGlobalDefinition	The storage for a WebAssembly global defined within the instance.
VMGlobalImport	The fields compiled code needs to access to utilize a WebAssembly global variable imported from another instance.
VMMemory	A memory export value.
VMMemoryDefinition	The fields compiled code needs to access to utilize a WebAssembly linear memory defined within the instance, namely the start address and the size in bytes.
VMMemoryImport	The fields compiled code needs to access to utilize a WebAssembly linear memory imported from another instance.
VMOffsets	This class computes offsets to fields within VMContext and other related structs that JIT code accesses directly.
VMSharedSignatureIndex	An index into the shared signature registry, usable for checking signatures at indirect calls.
VMTable	A table export value.
VMTableDefinition	The fields compiled code needs to access to utilize a WebAssembly table defined within the instance.
VMTableImport	The fields compiled code needs to access to utilize a WebAssembly table imported from another instance.

Enums

GlobalError	Error type describing things that can go wrong when operating on Wasm Globals.
ImportFunctionEnv	A collection of data about host envs used by imported functions.
MemoryError	Error type describing things that can go wrong when operating on Wasm Memories.
MemoryStyle	Implementation styles for WebAssembly linear memory.
TableElement	A reference stored in a table. Can be either an externref or a funcref.
TableStyle	Implementation styles for WebAssembly tables.
Trap	Stores trace message with backtrace.
TrapCode	A trap code describing the reason for a trap.
VMExtern	The value of an export passed from one instance to another.
VMFunctionKind	A function kind is a calling convention into and out of wasm code.
WeakOrStrongInstanceRef	An InstanceRef that may or may not be keeping the Instance alive.

Constants

VERSION

Version number of this crate.

Statics

PROBESTACK

The probestack based on the Rust probestack

Traits

Memory	Trait for implementing Wasm Memory used by Wasmer.
Table	Trait for implementing the interface of a Wasm table.
TrapHandler	A package of functionality needed by catch_traps to figure out what to do when handling a trap.

Functions

catch_traps⚠	Catches any wasm traps that happen within the execution of closure, returning them as a Result.
catch_traps_with_result⚠	Catches any wasm traps that happen within the execution of closure, returning them as a Result, with the closure contents.
init_traps	This function is required to be called before any WebAssembly is entered. This will configure global state such as signal handlers to prepare the process to receive wasm traps.
raise_lib_trap⚠	Raises a trap from inside library code immediately.
raise_user_trap⚠	Raises a user-defined trap immediately.
resume_panic⚠	Carries a Rust panic across wasm code and resumes the panic on the other side.
wasmer_call_trampoline⚠	Call the wasm function pointed to by callee.

Type Definitions

ImportInitializerFuncPtr	The function pointer to call with data and an [Instance] pointer to finish initializing the host env.
TrapHandlerFn	Function which may handle custom signals while processing traps.
VMTrampoline

Unions

VMFunctionEnvironment

Union representing the first parameter passed when calling a function.