Struct wasm_instrument::gas_metering::mutable_global::Injector

pub struct Injector {
    pub global_name: &'static str,
}

Injects a mutable global variable and a local function to the module to track current gas left.

The function is called in every metering block. In case of falling out of gas, the global is set to the sentinel value U64::MAX and unreachable instruction is called. The execution engine should take care of getting the current global value and setting it back in order to sync the gas left value during an execution.

Fields

global_name: &'static str

The export name of the gas tracking global.

Implementations

impl Injector

pub fn new(global_name: &'static str) -> Self

Trait Implementations

impl Backend for Injector

fn gas_meter<R: Rules>(self, module: &Module, rules: &R) -> GasMeter

Provides the gas metering implementation details.