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Report an error if a `#[no_mangle]`/`#[export_name = ...]` function has the same...
source link: https://github.com/rust-lang/miri/pull/1832
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Implements #1776 (comment).
The error looks like this:
error: found `malloc` symbol definition that clashes with a built-in shim
--> tests/compile-fail/function_calls/exported_symbol_shim_clashing.rs:12:9
|
12 | malloc(0);
| ^^^^^^^^^ found `malloc` symbol definition that clashes with a built-in shim
|
help: the `malloc` symbol is defined here
--> tests/compile-fail/function_calls/exported_symbol_shim_clashing.rs:2:1
|
2 | / extern "C" fn malloc(_: usize) -> *mut std::ffi::c_void {
3 | | //~^ HELP the `malloc` symbol is defined here
4 | | unreachable!()
5 | | }
| |_^
= note: inside `main` at tests/compile-fail/function_calls/exported_symbol_shim_clashing.rs:12:9
This does not implement "better error messages than we do currently for arg/ABI mismatches" in #1776 (comment) -- I failed to remove all check_arg_count() and check_abi() (they are still used in src/shims/intrinsics.rs and call_dlsym()) and they don't receive the name of the shim.
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