61 lines
2.2 KiB
Rust
61 lines
2.2 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::WasiCtx;
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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 store = Store::default();
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// Create our wasi context with pretty standard arguments/inheritance/etc.
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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.arg(bin_name)?.arg(".")?.inherit_stdio();
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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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/*
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// The nonstandard thing we do with `WasiCtxBuilder` is to ensure that
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// `stdin` is always an unreadable pipe. This is expected in the test suite
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// where `stdin` is never ready to be read. In some CI systems, however,
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// stdin is closed which causes tests to fail.
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let (reader, _writer) = os_pipe::pipe()?;
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let file = reader_to_file(reader);
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let handle = OsOther::try_from(file).context("failed to create OsOther from PipeReader")?;
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builder.stdin(handle);
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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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.context(format!("error while testing Wasm module '{}'", bin_name,))
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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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