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Format sources into the error message when loading codegen backends

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cc https://github.com/rust-lang/rustc_codegen_cranelift/issues/1447
This commit is contained in:
Simonas Kazlauskas 2024-01-10 17:13:03 +02:00
parent fcaeb45421
commit 1dc3ab02cd
3 changed files with 14 additions and 7 deletions
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6
compiler/rustc_codegen_cranelift/Cargo.lock
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@ -246,12 +246,12 @@ checksum = "9cdc71e17332e86d2e1d38c1f99edcb6288ee11b815fb1a4b049eaa2114d369b"
[[package]]
name = "libloading"
version = "0.7.4"
version = "0.8.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b67380fd3b2fbe7527a606e18729d21c6f3951633d0500574c4dc22d2d638b9f"
checksum = "c571b676ddfc9a8c12f1f3d3085a7b163966a8fd8098a90640953ce5f6170161"
dependencies = [
"cfg-if",
"winapi",
"windows-sys",
]
[[package]]

3
compiler/rustc_interface/src/lib.rs
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@ -1,9 +1,10 @@
#![feature(box_patterns)]
#![feature(decl_macro)]
#![feature(error_iter)]
#![feature(internal_output_capture)]
#![feature(thread_spawn_unchecked)]
#![feature(lazy_cell)]
#![feature(let_chains)]
#![feature(thread_spawn_unchecked)]
#![feature(try_blocks)]
#![recursion_limit = "256"]
#![deny(rustc::untranslatable_diagnostic)]

12
compiler/rustc_interface/src/util.rs
View File

@ -162,15 +162,21 @@ pub(crate) fn run_in_thread_pool_with_globals<F: FnOnce() -> R + Send, R: Send>(
}
fn load_backend_from_dylib(early_dcx: &EarlyDiagCtxt, path: &Path) -> MakeBackendFn {
fn format_err(e: &(dyn std::error::Error + 'static)) -> String {
e.sources().map(|e| format!(": {e}")).collect()
}
let lib = unsafe { Library::new(path) }.unwrap_or_else(|err| {
let err = format!("couldn't load codegen backend {path:?}: {err}");
let err = format!("couldn't load codegen backend {path:?}{}", format_err(&err));
early_dcx.early_fatal(err);
});
let backend_sym = unsafe { lib.get::<MakeBackendFn>(b"__rustc_codegen_backend") }
.unwrap_or_else(|e| {
let err = format!("couldn't load codegen backend: {e}");
early_dcx.early_fatal(err);
let e = format!(
"`__rustc_codegen_backend` symbol lookup in the codegen backend failed{}",
format_err(&e)
);
early_dcx.early_fatal(e);
});
// Intentionally leak the dynamic library. We can't ever unload it