1b8f9fd377
which works except for the lifetime issues, i think the trap still holds an Rc to the store?
83 lines
2.6 KiB
Rust
83 lines
2.6 KiB
Rust
use anyhow::Context;
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use std::convert::TryFrom;
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use std::fs::File;
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use std::path::Path;
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use wasi_c2::{
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virt::pipe::{ReadPipe, WritePipe},
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WasiCtx,
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};
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use wasmtime::{Linker, Module, Store};
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pub fn instantiate(data: &[u8], bin_name: &str, workspace: Option<&Path>) -> anyhow::Result<()> {
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let stdout = WritePipe::new_in_memory();
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let stderr = WritePipe::new_in_memory();
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let r = {
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let store = Store::default();
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// Create our wasi context.
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// Additionally register any preopened directories if we have them.
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let mut builder = wasi_c2::WasiCtx::builder();
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builder
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.arg(bin_name)?
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.arg(".")?
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.stdin(Box::new(ReadPipe::from(Vec::new())))
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.stdout(Box::new(stdout.clone()))
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.stderr(Box::new(stderr.clone()));
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if let Some(workspace) = workspace {
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let dirfd =
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File::open(workspace).context(format!("error while preopening {:?}", workspace))?;
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let preopen_dir = unsafe { cap_std::fs::Dir::from_std_file(dirfd) };
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builder.preopened_dir(Box::new(preopen_dir), ".")?;
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}
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let snapshot1 = wasi_c2_wasmtime::Wasi::new(&store, builder.build()?);
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let mut linker = Linker::new(&store);
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snapshot1.add_to_linker(&mut linker)?;
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let module = Module::new(store.engine(), &data).context("failed to create wasm module")?;
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linker
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.module("", &module)
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.and_then(|m| m.get_default(""))
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.and_then(|f| f.get0::<()>())
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.and_then(|f| f().map_err(Into::into))
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};
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match r {
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Ok(()) => Ok(()),
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Err(trap) => {
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let stdout = stdout
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.try_into_inner()
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.expect("sole ref to stdout")
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.into_inner();
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if !stdout.is_empty() {
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println!("guest stdout:\n{}\n===", String::from_utf8_lossy(&stdout));
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}
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let stderr = stderr
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.try_into_inner()
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.expect("sole ref to stderr")
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.into_inner();
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if !stderr.is_empty() {
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println!("guest stderr:\n{}\n===", String::from_utf8_lossy(&stderr));
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}
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Err(trap.context(format!("error while testing Wasm module '{}'", bin_name,)))
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}
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}
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}
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#[cfg(unix)]
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fn reader_to_file(reader: os_pipe::PipeReader) -> File {
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use std::os::unix::prelude::*;
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unsafe { File::from_raw_fd(reader.into_raw_fd()) }
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}
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#[cfg(windows)]
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fn reader_to_file(reader: os_pipe::PipeReader) -> File {
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use std::os::windows::prelude::*;
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unsafe { File::from_raw_handle(reader.into_raw_handle()) }
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}
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