You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: rlimited-memory.rs
    path of file: ./repos/wasmtime/tests
    
    the code of the file until where you have to start completion: // This test only works on Linux. It may be portable to MacOS as well,
// but the original author did not have a machine available to test it.
#![cfg(target_os = "linux")]

use wasmtime::*;

#[derive(Default)]
struct MemoryGrowFailureDetector {
    current: usize,
    desired: usize,
    error: Option<String>,
}

impl ResourceLimiter for MemoryGrowFailureDetector {
    fn memory_growing(
        &mut self,
        current: usize,
        desired: usize,
        _maximum: Option<usize>,
    ) -> Result<bool> {
        self.current = current;
        self.desired = desired;
        Ok(true)
    }
    fn memory_grow_failed(&mut self, err: anyhow::Error) -> Result<()> {
        self.error = Some(err.to_string());
        Ok(())
    }
    fn table_growing(
        &mut self,
        _current: u32,
        _desired: u32,
        _maximum: Option<u32>,
    ) -> Result<bool> {
        Ok(true)
    }
}

#[test]
#[cfg_attr(miri, ignore)]
fn custom_limiter_detect_os_oom_failure() -> Result<()> {
    if std
    
fn custom_limiter_detect_os_oom_failure() -> Result<()> {
    if std::env::var("WASMTIME_TEST_NO_HOG_MEMORY").is_ok() {
        return Ok(());
    }

    // Default behavior of on-demand memory allocation so that a
    // memory grow will hit Linux for a larger mmap.
    let engine = Engine::default();
    let linker = Linker::new(&engine);
    let module = Module::new(&engine, r#"(module (memory (export "m") 0))"#).unwrap();

    // Ask Linux to limit this process to 256MiB of memory
    let process_max_memory: usize = 256 * 1024 * 1024;
    unsafe {
        // limit process to 256MiB memory
        let rlimit = libc::rlimit {
            rlim_cur: 0,
            rlim_max: process_max_memory as u64,
        };
        let res = libc::setrlimit(libc::RLIMIT_DATA, &rlimit);
        assert_eq!(res, 0, "setrlimit failed: {}", res);
    };

    let context = MemoryGrowFailureDetector::default();

    let mut store = Store::new(&engine, context);
    store.limiter(|s| s as &mut dyn ResourceLimiter);
    let instance = linker.instantiate(&mut store, &module).unwrap();
    let memory = instance.get_memory(&mut store, "m").unwrap();

    // Small (640KiB) grow should succeed
    memory.grow(&mut store, 10).unwrap();
    assert!(store.data().error.is_none());
    assert_eq!(store.data().current, 0);
    assert_eq!(store.data().desired, 10 * 64 * 1024);

    // Try to grow past the process's memory limit.
    // This should fail.
    let pages_exceeding_limit = process_max_memory / (64 * 1024);
    let err_msg = memory
        .grow(&mut store, pages_exceeding_limit as u64)
        .unwrap_err()
        .to_string();
    assert!(
        err_msg.starts_with("failed to grow memory"),
        "unexpected error: {}",
        err_msg
    );

    assert_eq!(store.data().current, 10 * 64 * 1024);
    assert_eq!(
        store.data().desired,
        (pages_exceeding_limit + 10) * 64 * 1024
    );
    // The memory_grow_failed hook should show Linux gave OOM:
    let err_msg = store.data().error.as_ref().unwrap();
    assert!(
        err_msg.starts_with("Cannot allocate memory"),
        "unexpected error: {}",
        err_msg
    );
    Ok(())
}