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

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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
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3
compiler/rustc_feature/src/active.rs
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@ -593,6 +593,9 @@ declare_features! (
/// Allows to use the `#[cmse_nonsecure_entry]` attribute.
(active, cmse_nonsecure_entry, "1.48.0", Some(75835), None),
/// Allows rustc to inject a default alloc_error_handler
(active, default_alloc_error_handler, "1.48.0", Some(66741), None),
// -------------------------------------------------------------------------
// feature-group-end: actual feature gates
// -------------------------------------------------------------------------