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ceff23c6e3
All references to interposable symbols can be redirected at runtime to point to a different symbol definition (with the same name). For example, if both dylib A and B define symbol _foo, and we load A before B at runtime, then all references to _foo within dylib B will point to the definition in dylib A. ld64 makes all extern symbols interposable when linking with `-flat_namespace`. TODO 1: Support `-interposable` and `-interposable_list`, which should just be a matter of parsing those CLI flags and setting the `Defined::interposable` bit. TODO 2: Set Reloc::FinalDefinitionInLinkageUnit correctly with this info (we are currently not setting it at all, so we're erring on the conservative side, but we should help the LTO backend generate more optimal code.) Reviewed By: modimo, MaskRay Differential Revision: https://reviews.llvm.org/D119294
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.