Struct DebugFrameCursor 

pub struct DebugFrameCursor<'a> { /* private fields */ }

A view of an active stack frame, with the ability to move up the stack.

See the documentation on Store::stack_value for more information about which frames this view will show.

Implementations

impl<'a> DebugFrameCursor<'a>

pub fn move_to_parent(&mut self)

Move up to the next frame in the activation.

pub fn done(&self) -> bool

Has the iterator reached the end of the activation?

pub fn instance(&mut self) -> Instance

Get the instance associated with the current frame.

pub fn module(&self) -> Option<&Module>

Get the module associated with the current frame, if any (i.e., not a container instance for a host-created entity).

pub fn wasm_function_index_and_pc(&self) -> Option<(DefinedFuncIndex, u32)>

Get the raw function index associated with the current frame, and the PC as an offset within its code section, if it is a Wasm function directly from the given Module (rather than a trampoline).

pub fn num_locals(&self) -> u32

Get the number of locals in this frame.

pub fn num_stacks(&self) -> u32

Get the depth of the operand stack in this frame.

pub fn local(&mut self, index: u32) -> Val

Get the type and value of the given local in this frame.

Panics

Panics if the index is out-of-range (greater than num_locals()).

pub fn stack(&mut self, index: u32) -> Val

Get the type and value of the given operand-stack value in this frame.

Index 0 corresponds to the bottom-of-stack, and higher indices from there are more recently pushed values. In other words, index order reads the Wasm virtual machine’s abstract stack state left-to-right.