fec5b7ab0a
Changes: * use [tempfile] crate for auto mgmt of temp dirs * use concrete types in place of generics in `utils` module [tempfile]: https://github.com/Stebalien/tempfile
48 lines
1.6 KiB
Rust
48 lines
1.6 KiB
Rust
use cranelift_codegen::settings;
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use std::path::Path;
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use wasmtime_jit::Context;
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pub fn instantiate(data: &[u8], bin_name: &str, workspace: Option<&Path>) -> Result<(), String> {
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// Prepare runtime
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let isa_builder =
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cranelift_native::builder().map_err(|_| "host machine is not a supported target")?;
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let flag_builder = settings::builder();
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let isa = isa_builder.finish(settings::Flags::new(flag_builder));
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let mut context = Context::with_isa(isa);
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let global_exports = context.get_global_exports();
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let get_preopens = |workspace: Option<&Path>| -> Result<Vec<_>, String> {
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if let Some(workspace) = workspace {
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let preopen_dir = wasi_common::preopen_dir(workspace).map_err(|e| {
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format!(
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"error while preopening directory '{}': {}",
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workspace.display(),
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e
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)
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})?;
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Ok(vec![(".".to_owned(), preopen_dir)])
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} else {
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Ok(vec![])
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}
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};
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context.name_instance(
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"wasi_unstable".to_owned(),
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wasmtime_wasi::instantiate_wasi(
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"",
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global_exports,
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&get_preopens(workspace)?,
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&[bin_name.to_owned(), ".".to_owned()],
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&[],
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)
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.map_err(|e| format!("error instantiating WASI: {}", e))?,
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);
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// Compile and instantiating a wasm module.
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context
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.instantiate_module(None, &data)
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.map(|_| ())
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.map_err(|e| format!("error while processing main module '{}': {}", bin_name, e))
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}
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