pub struct FrameInfo { /* private fields */ }
Expand description

Description of a frame in a backtrace for a RuntimeError::trace.

Whenever a WebAssembly trap occurs an instance of RuntimeError is created. Each RuntimeError has a backtrace of the WebAssembly frames that led to the trap, and each frame is described by this structure.

Implementations§

Creates a new FrameInfo, useful for testing.

Returns the WebAssembly function index for this frame.

This function index is the index in the function index space of the WebAssembly module that this frame comes from.

Returns the identifer of the module that this frame is for.

ModuleInfo identifiers are present in the name section of a WebAssembly binary, but this may not return the exact item in the name section. ModuleInfo names can be overwritten at construction time or perhaps inferred from file names. The primary purpose of this function is to assist in debugging and therefore may be tweaked over time.

This function returns None when no name can be found or inferred.

Returns a descriptive name of the function for this frame, if one is available.

The name of this function may come from the name section of the WebAssembly binary, or wasmer may try to infer a better name for it if not available, for example the name of the export if it’s exported.

This return value is primarily used for debugging and human-readable purposes for things like traps. Note that the exact return value may be tweaked over time here and isn’t guaranteed to be something in particular about a wasm module due to its primary purpose of assisting in debugging.

This function returns None when no name could be inferred.

Returns the offset within the original wasm module this frame’s program counter was at.

The offset here is the offset from the beginning of the original wasm module to the instruction that this frame points to.

Returns the offset from the original wasm module’s function to this frame’s program counter.

The offset here is the offset from the beginning of the defining function of this frame (within the wasm module) to the instruction this frame points to.

Trait Implementations§

Returns a copy of the value. Read more
Performs copy-assignment from source. Read more
Formats the value using the given formatter. Read more

Auto Trait Implementations§

Blanket Implementations§

Gets the TypeId of self. Read more
The archived version of the pointer metadata for this type.
Converts some archived metadata to the pointer metadata for itself.
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more
Deserializes using the given deserializer

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The type for metadata in pointers and references to Self.
The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning. Read more
Uses borrowed data to replace owned data, usually by cloning. Read more
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.