Trait wasmtime_runtime::TrapInfo[−][src]

pub unsafe trait TrapInfo {
    fn as_any(&self) -> &dyn Any;

    fn is_wasm_trap(&self, pc: usize) -> bool;

    fn custom_signal_handler(
        &self, 
        call: &dyn Fn(&SignalHandler<'_>) -> bool
    ) -> bool;

    fn max_wasm_stack(&self) -> usize;

    fn out_of_gas(&self);
}

A package of functionality needed by catch_traps to figure out what to do when handling a trap.

Note that this is an unsafe trait at least because it’s being run in the context of a synchronous signal handler, so it needs to be careful to not access too much state in answering these queries.

Required methods

fn as_any(&self) -> &dyn Any[src]

Converts this object into an Any to dynamically check its type.

fn is_wasm_trap(&self, pc: usize) -> bool[src]

Returns whether the given program counter lies within wasm code, indicating whether we should handle a trap or not.

fn custom_signal_handler(
    &self,
    call: &dyn Fn(&SignalHandler<'_>) -> bool
) -> bool[src]

Uses call to call a custom signal handler, if one is specified.

Returns true if call returns true, otherwise returns false.

fn max_wasm_stack(&self) -> usize[src]

Returns the maximum size, in bytes, the wasm native stack is allowed to grow to.

fn out_of_gas(&self)[src]

Callback invoked whenever WebAssembly has entirely consumed the fuel that it was allotted.

This function may return, and it may also raise_lib_trap.

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Implementors

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