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| author | Fangrui Song <i@maskray.me> | 2022-02-23 16:08:25 -0800 |
|---|---|---|
| committer | Fangrui Song <i@maskray.me> | 2022-02-23 16:08:25 -0800 |
| commit | 0477cac332d5abf7b2b51b470370afcbb1e8d513 (patch) | |
| tree | fee6ef9cdbcc09a13a419cb1c556eb04fd3ab369 /clang/lib/Frontend/InitPreprocessor.cpp | |
| parent | 454c149898d37b8e227f0d0347f7abd7ecc715e0 (diff) | |
| download | llvm-0477cac332d5abf7b2b51b470370afcbb1e8d513.zip llvm-0477cac332d5abf7b2b51b470370afcbb1e8d513.tar.gz llvm-0477cac332d5abf7b2b51b470370afcbb1e8d513.tar.bz2 | |
[asan] Allow -fsanitize-address-globals-dead-stripping with -fno-data-sections for ELF
-fdata-sections decides whether global variables go into different sections.
This is orthogonal to whether we place their metadata (`.data` or `asan_globals`) into different sections.
With -fno-data-sections, `-fsanitize-address-globals-dead-stripping` can still:
* deduplicate COMDAT `asan.module_ctor` and `asan.module_dtor`
* (with ld --gc-sections): for a data section (e.g. `.data`), if all global variables defined relative to it are unreferenced, discard them and associated `asan_globals` sections (rare but no need to exclude this case)
Similar to c7b90947bd0179d914fea56b52be545c8f60f20a for PE/COFF.
Reviewed By: #sanitizers, kstoimenov, vitalybuka
Differential Revision: https://reviews.llvm.org/D120394
Diffstat (limited to 'clang/lib/Frontend/InitPreprocessor.cpp')
0 files changed, 0 insertions, 0 deletions