1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
//@ run-pass
//! Test retrieval and kinds of foreign items.
//@ ignore-stage1
//@ ignore-cross-compile
//@ ignore-remote
//@ ignore-windows-gnu mingw has troubles with linking https://github.com/rust-lang/rust/pull/116837
//@ edition: 2021
#![feature(rustc_private)]
#![feature(assert_matches)]
#![feature(control_flow_enum)]
extern crate rustc_middle;
#[macro_use]
extern crate rustc_smir;
extern crate rustc_driver;
extern crate rustc_interface;
extern crate rustc_span;
extern crate stable_mir;
use rustc_smir::rustc_internal;
use stable_mir::{
ty::{Abi, ForeignItemKind},
*,
};
use std::assert_matches::assert_matches;
use std::io::Write;
use std::ops::ControlFlow;
const CRATE_NAME: &str = "input";
/// This function uses the Stable MIR APIs to get information about the test crate.
fn test_foreign() -> ControlFlow<()> {
let mods =
local_crate().foreign_modules().into_iter().map(|def| def.module()).collect::<Vec<_>>();
assert_eq!(mods.len(), 2);
let rust_mod = mods.iter().find(|m| matches!(m.abi, Abi::Rust)).unwrap();
assert_eq!(rust_mod.items().len(), 1);
let c_mod = mods.iter().find(|m| matches!(m.abi, Abi::C { .. })).unwrap();
let c_items = c_mod.items();
assert_eq!(c_items.len(), 3);
for item in c_items {
let kind = item.kind();
match item.name().as_str() {
"foo" => assert_matches!(kind, ForeignItemKind::Fn(..)),
"bar" => assert_matches!(kind, ForeignItemKind::Static(..)),
"Baz" => assert_matches!(kind, ForeignItemKind::Type(..)),
name => unreachable!("Unexpected item {name}"),
};
}
ControlFlow::Continue(())
}
/// This test will generate and analyze a dummy crate using the stable mir.
/// For that, it will first write the dummy crate into a file.
/// Then it will create a `StableMir` using custom arguments and then
/// it will run the compiler.
fn main() {
let path = "foreign_input.rs";
generate_input(&path).unwrap();
let args = vec![
"rustc".to_string(),
"-Cpanic=abort".to_string(),
"--crate-type=lib".to_string(),
"--crate-name".to_string(),
CRATE_NAME.to_string(),
path.to_string(),
];
run!(args, || test_foreign()).unwrap();
}
fn generate_input(path: &str) -> std::io::Result<()> {
let mut file = std::fs::File::create(path)?;
write!(
file,
r#"
#![feature(extern_types)]
#![allow(unused)]
extern "Rust" {{
fn rust_foo(x: i32) -> i32;
}}
extern "C" {{
fn foo(x: i32) -> i32;
static bar: i32;
type Baz;
}}
"#
)?;
Ok(())
}
|
