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56074b5231
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). |
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|---|---|---|
| .. | ||
| liveness | ||
| check_attr.rs | ||
| check_const.rs | ||
| dead.rs | ||
| debugger_visualizer.rs | ||
| diagnostic_items.rs | ||
| entry.rs | ||
| errors.rs | ||
| hir_id_validator.rs | ||
| hir_stats.rs | ||
| lang_items.rs | ||
| layout_test.rs | ||
| lib_features.rs | ||
| lib.rs | ||
| liveness.rs | ||
| loops.rs | ||
| naked_functions.rs | ||
| reachable.rs | ||
| stability.rs | ||
| upvars.rs | ||
| weak_lang_items.rs | ||