Crate wasmtime_runtime

Runtime library support for Wasmtime.

Modules

libcalls

Runtime library calls.

Structs

ExportFunction	A function export value.
ExportGlobal	A global export value.
ExportMemory	A memory export value.
ExportTable	A table export value.
GdbJitImageRegistration	Registeration for JIT image
Imports	Resolved import pointers.
InstanceAllocationRequest	Represents a request for a new runtime instance.
InstanceHandle	A handle holding an Instance of a WebAssembly module.
InstanceLimits	Represents the limits placed on instances by the pooling instance allocator.
LinkError	An link error while instantiating a module.
Mmap	A simple struct consisting of a page-aligned pointer to page-aligned and initially-zeroed memory and a length.
ModuleLimits	Represents the limits placed on a module for compiling with the pooling instance allocator.
OnDemandInstanceAllocator	Represents the on-demand instance allocator.
PoolingInstanceAllocator	Implements the pooling instance allocator.
TlsRestore	Opaque state used to help control TLS state across stack switches for async support.
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 Cranelift. This has information about globals, memories, tables, and other runtime state associated with the current instance.
VMExternRef	An external reference to some opaque data.
VMExternRefActivationsTable	A table that over-approximizes the set of VMExternRefs that any Wasm activation on this thread is currently using.
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.
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.
VMInterrupts	Structure used to control interrupting wasm code.
VMInvokeArgument	The storage for a WebAssembly invocation argument
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.
VMSharedSignatureIndex	An index into the shared signature registry, usable for checking signatures at indirect calls.
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

Export	The value of an export passed from one instance to another.
InstantiationError	An error while instantiating a module.
Memory	Representation of a runtime wasm linear memory.
PoolingAllocationStrategy	The allocation strategy to use for the pooling instance allocator.
Table	Represents an instance’s table.
TableElement	An element going into or coming out of a table.
Trap	Stores trace message with backtrace.

Constants

DEFAULT_INSTANCE_LIMIT	Value returned by ResourceLimiter::instances default method
DEFAULT_MEMORY_LIMIT	Value returned by ResourceLimiter::memories default method
DEFAULT_TABLE_LIMIT	Value returned by ResourceLimiter::tables default method
VERSION	Version number of this crate.

Traits

InstanceAllocator	Represents a runtime instance allocator.
ModuleInfo	Used by the runtime to query module information.
ModuleInfoLookup	Used by the runtime to lookup information about a module given a program counter value.
ResourceLimiter	Used by hosts to limit resource consumption of instances.
RuntimeLinearMemory	A linear memory
RuntimeMemoryCreator	A memory allocator
Store	Dynamic runtime functionality needed by this crate throughout the execution of a wasm instance.

Functions

catch_traps⚠	Catches any wasm traps that happen within the execution of closure, returning them as a Result.
gc⚠	Perform garbage collection of VMExternRefs.
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.
pointer_type	The Cranelift IR type used for pointer types for this target architecture.
raise_lib_trap⚠	Raises a trap from inside library code immediately.
raise_user_trap⚠	Raises a user-defined trap immediately.
ref_type	The Cranelift IR type used for reference types for this target architecture.
resume_panic⚠	Carries a Rust panic across wasm code and resumes the panic on the other side.
tls_eager_initialize	Eagerly initialize thread-local runtime functionality. This will be performed lazily by the runtime if users do not perform it eagerly.

Type Definitions

SignalHandler	Function which may handle custom signals while processing traps.
VMTrampoline	Trampoline function pointer type.