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rust/compiler/rustc_codegen_ssa
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Dylan DPC f79be2c6de
Rollup merge of #81898 - nanguye2496:nanguye2496/fix_str_and_slice_visualization, r=varkor 
Fix debug information for function arguments of type &str or slice.

Issue details:
When lowering MIR to LLVM IR, the compiler decomposes every &str and slice argument into a data pointer and a usize. Then, the original argument is reconstructed from the pointer and the usize arguments in the body of the function that owns it. Since the original argument is declared in the body of a function, it should be marked as a LocalVariable instead of an ArgumentVairable. This confusion causes MSVC debuggers unable to visualize &str and slice arguments correctly. (See https://github.com/rust-lang/rust/issues/81894 for more details).

Fix details:
Making sure that the debug variable for every &str and slice argument is marked as LocalVariable instead of ArgumentVariable in computing_per_local_var_debug_info. This change has been verified on VS Code debugger, VS debugger, WinDbg and LLDB.
2021-02-17 23:51:17 +01:00
..
src Rollup merge of #81898 - nanguye2496:nanguye2496/fix_str_and_slice_visualization, r=varkor 2021-02-17 23:51:17 +01:00
Cargo.toml rustc_codegen_ssa: tune codegen scheduling to reduce memory usage 2021-02-03 18:55:05 -08:00
README.md

README.md

Please read the rustc-dev-guide chapter on Backend Agnostic Codegen.