bjoernager/rust
bjoernager/rust
1
Fork 0
Code Activity

Implement Make handle_alloc_error default to panic (for no_std + liballoc)

Browse source 
Related: https://github.com/rust-lang/rust/issues/66741

Guarded with `#![feature(default_alloc_error_handler)]` a default
`alloc_error_handler` is called, if a custom allocator is used and no
other custom `#[alloc_error_handler]` is defined.

The panic message does not contain the size anymore, because it would
pull in the fmt machinery, which would blow up the code size
significantly.
This commit is contained in:
Harald Hoyer 2020-09-07 10:45:20 +02:00
parent f283d3f02c
commit cadd12b5f0
12 changed files with 292 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

5
compiler/rustc_passes/src/weak_lang_items.rs
View file

@ -64,7 +64,10 @@ fn verify<'tcx>(tcx: TyCtxt<'tcx>, items: &lang_items::LanguageItems) {
if item == LangItem::PanicImpl {
tcx.sess.err("`#[panic_handler]` function required, but not found");
} else if item == LangItem::Oom {
tcx.sess.err("`#[alloc_error_handler]` function required, but not found");
if !tcx.features().default_alloc_error_handler {
tcx.sess.err("`#[alloc_error_handler]` function required, but not found.");
tcx.sess.note_without_error("Use `#![feature(default_alloc_error_handler)]` for a default error handler.");
}
} else {
tcx.sess.err(&format!("language item required, but not found: `{}`", name));
}