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| author | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2017-03-17 22:17:29 +0000 |
|---|---|---|
| committer | Evgeniy Stepanov <eugeni.stepanov@gmail.com> | 2017-03-17 22:17:29 +0000 |
| commit | c5aa6b94115d12986af7feff180f2ddf53498b06 (patch) | |
| tree | 06a75d13b55084777afc16d77a4916970d4e9fc4 /clang/lib/Serialization/ModuleManager.cpp | |
| parent | 51c962f72e9569d54dc9c853abf99e2c34fc41cf (diff) | |
| download | llvm-c5aa6b94115d12986af7feff180f2ddf53498b06.zip llvm-c5aa6b94115d12986af7feff180f2ddf53498b06.tar.gz llvm-c5aa6b94115d12986af7feff180f2ddf53498b06.tar.bz2 | |
[asan] Fix dead stripping of globals on Linux.
Use a combination of !associated, comdat, @llvm.compiler.used and
custom sections to allow dead stripping of globals and their asan
metadata. Sometimes.
Currently this works on LLD, which supports SHF_LINK_ORDER with
sh_link pointing to the associated section.
This also works on BFD, which seems to treat comdats as
all-or-nothing with respect to linker GC. There is a weird quirk
where the "first" global in each link is never GC-ed because of the
section symbols.
At this moment it does not work on Gold (as in the globals are never
stripped).
Differential Revision: https://reviews.llvm.org/D30121
llvm-svn: 298158
Diffstat (limited to 'clang/lib/Serialization/ModuleManager.cpp')
0 files changed, 0 insertions, 0 deletions