| commit | 62c629ab0c76201819b05dc4398bfc570f39f810 | [log] [tgz] |
|---|---|---|
| author | Fangrui Song <i@maskray.me> | Fri Nov 03 11:05:09 2023 -0700 |
| committer | Copybara-Service <copybara-worker@google.com> | Fri Nov 03 11:07:51 2023 -0700 |
| tree | 22efa8f252842f0db8716b7b59574454e82abf98 | |
| parent | 26360ab3ac64ffe563ae1c22909de99932998ad3 [diff] |
[ELF] Enhance --no-allow-shlib-undefined to report non-exported definition (#70769) For a DSO with all DT_NEEDED entries accounted for, if it contains an undefined non-weak symbol that shares a name with a non-exported definition (hidden visibility or localized by a version script), and there is no DSO definition, we should also report an error. Because the definition is not exported, it cannot resolve the DSO reference at runtime. GNU ld introduced this error-checking in [April 2003](https://sourceware.org/pipermail/binutils/2003-April/026568.html). The feature is available for executable links but not for -shared, and it is orthogonal to --no-allow-shlib-undefined. We make the feature part of --no-allow-shlib-undefined and work with -shared when --no-allow-shlib-undefined is specified. A subset of this error-checking is covered by commit 1981b1b6b92f7579a30c9ed32dbdf3bc749c1b40 for --gc-sections discarded sections. This patch covers non-discarded sections as well. Internally, I have identified 2 bugs (which would fail with LD_BIND_NOW=1) covered by commit 1981b1b6b92f7579a30c9ed32dbdf3bc749c1b40 GitOrigin-RevId: 49168b2512ef55e225e9b7cd0821daa5c8ae5a9b
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.
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.