rust/library/alloc
Amanieu d'Antras 56074b5231 Rewrite implementation of #[alloc_error_handler]
The new implementation doesn't use weak lang items and instead changes
`#[alloc_error_handler]` to an attribute macro just like
`#[global_allocator]`.

The attribute will generate the `__rg_oom` function which is called by
the compiler-generated `__rust_alloc_error_handler`. If no `__rg_oom`
function is defined in any crate then the compiler shim will call
`__rdl_oom` in the alloc crate which will simply panic.

This also fixes link errors with `-C link-dead-code` with
`default_alloc_error_handler`: `__rg_oom` was previously defined in the
alloc crate and would attempt to reference the `oom` lang item, even if
it didn't exist. This worked as long as `__rg_oom` was excluded from
linking since it was not called.

This is a prerequisite for the stabilization of
`default_alloc_error_handler` (#102318).
2022-10-31 16:32:57 +00:00
..
benches Stabilize map_first_last 2022-09-30 17:00:07 +02:00
src Rewrite implementation of #[alloc_error_handler] 2022-10-31 16:32:57 +00:00
tests Add regression test for lifetimes in alloc internals autotraits 2022-10-05 12:15:17 -07:00
Cargo.toml Switch all libraries to the 2021 edition 2021-12-23 19:03:47 +08:00