mirror of https://github.com/rust-lang/rust
94 lines
2.6 KiB
Rust
94 lines
2.6 KiB
Rust
//@ run-pass
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//! Test retrieval and kinds of foreign items.
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//@ ignore-stage1
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//@ ignore-cross-compile
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//@ ignore-remote
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//@ ignore-windows-gnu mingw has troubles with linking https://github.com/rust-lang/rust/pull/116837
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//@ edition: 2021
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#![feature(rustc_private)]
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#![feature(assert_matches)]
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#![feature(control_flow_enum)]
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extern crate rustc_middle;
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#[macro_use]
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extern crate rustc_smir;
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extern crate rustc_driver;
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extern crate rustc_interface;
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extern crate rustc_span;
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extern crate stable_mir;
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use rustc_smir::rustc_internal;
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use stable_mir::{
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ty::{Abi, ForeignItemKind},
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*,
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};
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use std::assert_matches::assert_matches;
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use std::io::Write;
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use std::ops::ControlFlow;
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const CRATE_NAME: &str = "input";
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/// This function uses the Stable MIR APIs to get information about the test crate.
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fn test_foreign() -> ControlFlow<()> {
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let mods =
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local_crate().foreign_modules().into_iter().map(|def| def.module()).collect::<Vec<_>>();
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assert_eq!(mods.len(), 2);
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let rust_mod = mods.iter().find(|m| matches!(m.abi, Abi::Rust)).unwrap();
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assert_eq!(rust_mod.items().len(), 1);
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let c_mod = mods.iter().find(|m| matches!(m.abi, Abi::C { .. })).unwrap();
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let c_items = c_mod.items();
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assert_eq!(c_items.len(), 3);
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for item in c_items {
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let kind = item.kind();
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match item.name().as_str() {
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"foo" => assert_matches!(kind, ForeignItemKind::Fn(..)),
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"bar" => assert_matches!(kind, ForeignItemKind::Static(..)),
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"Baz" => assert_matches!(kind, ForeignItemKind::Type(..)),
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name => unreachable!("Unexpected item {name}"),
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};
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}
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ControlFlow::Continue(())
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}
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/// This test will generate and analyze a dummy crate using the stable mir.
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/// For that, it will first write the dummy crate into a file.
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/// Then it will create a `StableMir` using custom arguments and then
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/// it will run the compiler.
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fn main() {
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let path = "foreign_input.rs";
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generate_input(&path).unwrap();
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let args = vec![
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"rustc".to_string(),
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"-Cpanic=abort".to_string(),
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"--crate-type=lib".to_string(),
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"--crate-name".to_string(),
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CRATE_NAME.to_string(),
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path.to_string(),
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];
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run!(args, || test_foreign()).unwrap();
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}
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fn generate_input(path: &str) -> std::io::Result<()> {
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let mut file = std::fs::File::create(path)?;
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write!(
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file,
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r#"
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#![feature(extern_types)]
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#![allow(unused)]
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extern "Rust" {{
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fn rust_foo(x: i32) -> i32;
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}}
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extern "C" {{
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fn foo(x: i32) -> i32;
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static bar: i32;
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type Baz;
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}}
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"#
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)?;
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Ok(())
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}
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