MaskRay planned changes to this revision.
MaskRay added a comment.
I am thinking whether we may need fine-grained
`-fno-semantic-interposition-{data,function}`. I've noticed one problem with an
internal target `_multiarray_umath.so` `npy_ma_str_array_finalize`. I need to
make more investigation, but there is a chance that we can default to
`-fno-semantic-interposition-function` but not
`-fno-semantic-interposition-data`.
There is an issue that should be fixed in LTO. dso_local needs to be removed
for a split LTO unit. Inferring `dso_local` when `-fPIC
-fno-semantic-interposition` can cause problem to `-fsanitize=cfi
-fsanitize-cfi-cross-dso -fsplit-lto-unit`. For my own note,
`absl/base:sysinfo_test` can cause `error: relocation R_X86_64_PC32 cannot be
used against symbol vtable for BaseArena; recompile with -fPIC`.
At least, before the LTO issue is fixed, we cannot assume dso_local for
-fno-semantic-position (even if specified explicitly).
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D73865/new/
https://reviews.llvm.org/D73865
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