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57e5b82e8c
When using the linker flags `--icf=safe_thunks` and `--keep-icf-stabs` together, an issue arises with the STABS debugging entries in the linked output. The problem affects STABS entries for functions that are folded via ICF using thunks. For instance, if `func1` is merged into `func2` through a thunk, the STABS entry for `func1` incorrectly points to the object file of `func2`. This is incorrect behavior—each function’s STABS entry should consistently point to its own original object file (e.g., the STABS entry for `func1` should reference `func1`’s object file). This issue causes `dsymutil` to not be able to retrieve the debug information for the problematic function. This patch corrects this behavior - making it so that STABS entries always point to the correct object file.
LLVM Linker (lld)
This directory and its subdirectories contain source code for the LLVM Linker, a modular cross platform linker which is built as part of the LLVM compiler infrastructure project.
lld is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt.
Benchmarking
In order to make sure various developers can evaluate patches over the same tests, we create a collection of self contained programs.
It is hosted at https://s3-us-west-2.amazonaws.com/linker-tests/lld-speed-test.tar.xz
The current sha256 is 10eec685463d5a8bbf08d77f4ca96282161d396c65bd97dc99dbde644a31610f.