Function growth_trap

tests/all/limits.rs:1111–1166

()

#[test]
#[cfg_attr(miri, ignore)]
fn growth_trap() -> Result<()> {
    let engine = Engine::default();
    let module = Module::new(
        &engine,
        r#"(module
            (memory $m (export "m") 0)
            (table (export "t") 0 funcref)
            (func (export "grow") (param i32) (result i32)
              (memory.grow $m (local.get 0)))
           )"#,
    )?;

    let mut store = Store::new(
        &engine,
        StoreLimitsBuilder::new()
            .memory_size(WASM_PAGE_SIZE)
            .table_elements(1)
            .trap_on_grow_failure(true)
            .build(),
    );
    store.limiter(|s| s as &mut dyn ResourceLimiter);

    let instance = Instance::new(&mut store, &module, &[])?;

    // Test instance exports and host objects hitting the limit
    for memory in [
        instance.get_memory(&mut store, "m").unwrap(),
        Memory::new(&mut store, MemoryType::new(0, None))?,
    ] {
        memory.grow(&mut store, 1)?;
        assert!(memory.grow(&mut store, 1).is_err());
    }

    // Test instance exports and host objects hitting the limit
    for table in [
        instance.get_table(&mut store, "t").unwrap(),
        Table::new(
            &mut store,
            TableType::new(RefType::FUNCREF, 0, None),
            Ref::Func(None),
        )?,
    ] {
        table.grow(&mut store, 1, Ref::Func(None))?;
        assert!(table.grow(&mut store, 1, Ref::Func(None)).is_err());
    }

    let mut store = Store::new(&engine, store.data().clone());
    store.limiter(|s| s as &mut dyn ResourceLimiter);
    let instance = Instance::new(&mut store, &module, &[])?;
    let grow = instance.get_func(&mut store, "grow").unwrap();
    let grow = grow.typed::<i32, i32>(&store).unwrap();
    grow.call(&mut store, 1)?;
    assert!(grow.call(&mut store, 1).is_err());

    Ok(())
}