Crate unc_vm_vm

Runtime library support for Wasmer.

Re-exports

• pub use crate::tunables::TestTunables;

Modules

• libcalls
  Runtime library calls.
• traphandlers
  WebAssembly trap handling, which is built on top of the lower-level signalhandling mechanisms.

Structs

• ExportFunction
  A function export value with an extra function pointer to initialize host environments.
• ExportFunctionMetadata
  Extra metadata about ExportFunctions.
• FuncDataRegistry
  The registry that holds the values that VMFuncRefs point to.
• FunctionBodyPtr
  A pointer to the beginning of the function body.
• FunctionExtent
  Represents a continuous region of executable memory starting with a function entry point.
• Global
  A Global instance
• Imports
  Resolved import pointers.
• 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.
• NamedResolverChain
  A Resolver that links two resolvers together in a chain.
• NullResolver
  Resolver implementation that always resolves to None. Equivalent to ().
• 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.
• VMImport
  A module import.
• VMLocalFunction
  A locally defined function.
• 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

• Export
  The value of an export passed from one instance to another.
• 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.
• VMImportType
  Type of the import.
• 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

• Artifact
  A predecesor of a full module Instance.
• ChainableNamedResolver
  A trait for chaining resolvers together.
• Instantiatable
  Artifacts that can be instantiated.
• Memory
  Trait for implementing Wasm Memory used by Wasmer.
• NamedResolver
  Import resolver connects imports with available exported values.
• Resolver
  Import resolver connects imports with available exported values.
• Table
  Trait for implementing the interface of a Wasm table.
• Tunables
  An engine delegates the creation of memories, tables, and globals to a foreign implementor of this trait.

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.
• initialize_host_envs^⚠
  Initializes the host environments.
• 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.
• unc_vm_call_trampoline^⚠
  Call the VM function pointed to by callee.

Type Aliases

• ImportInitializerFuncPtr
  The function pointer to call with data and an [Instance] pointer to finish initializing the host env.
• VMTrampoline
  Signature/ABI of the trampoline.

Unions

• VMFunctionEnvironment
  Union representing the first parameter passed when calling a function.