Function gc_heap_oom

tests/all/gc.rs:1473–1552

()

#[test]
#[cfg_attr(any(miri, not(target_pointer_width = "64")), ignore)]
fn gc_heap_oom() -> Result<()> {
    if std::env::var("WASMTIME_TEST_NO_HOG_MEMORY").is_ok() {
        return Ok(());
    }

    let _ = env_logger::try_init();

    for heap_size in [
        // Very small heap.
        1 << 16,
        // Bigger heap: 4 GiB
        1 << 32,
    ] {
        for pooling in [true, false] {
            let mut config = Config::new();
            config.wasm_function_references(true);
            config.wasm_gc(true);
            config.collector(Collector::Null);
            config.memory_reservation(heap_size);
            config.memory_reservation_for_growth(0);
            config.memory_guard_size(0);
            config.memory_may_move(false);
            config.gc_heap_reservation(heap_size);
            config.gc_heap_reservation_for_growth(0);
            config.gc_heap_guard_size(0);
            config.gc_heap_may_move(false);

            if pooling {
                let mut pooling = crate::small_pool_config();
                pooling.max_memory_size(heap_size.try_into().unwrap());
                config.allocation_strategy(InstanceAllocationStrategy::Pooling(pooling));
            }

            let engine = Engine::new(&config)?;

            let module = Module::new(
                &engine,
                r#"
                (module
                    (type $s (struct))
                    (global $g (export "g") (mut i32) (i32.const 0))
                    (func (export "run")
                      loop
                        struct.new $s

                        global.get $g
                        i32.const 1
                        i32.add
                        global.set $g

                        br 0
                      end
                    )
                )
            "#,
            )?;

            let mut store = Store::new(&engine, ());