`DTLS_on_libc_memalign` is called from primary
allocator, so `__sanitizer_get_allocated_begin`
should also be aware of allocation,
and correctly handled by `GetDTLSRange`.
C++11 `alignas` is already used extensively. `alignas` must precede
`static`, so adjust the ordering accordingly.
msan.cpp: Clang 15 doesn't allow `__attribute__((visibility("default"))) alignas(16)`.
Use the order `alignas(16) SANITIZER_INTERFACE_ATTRIBUTE`. Tested with Clang 7.
Pull Request: https://github.com/llvm/llvm-project/pull/98958
Since glibc 2.34, dlsym does
1. malloc 1
2. malloc 2
3. free pointer from malloc 1
4. free pointer from malloc 2
These sequence was not handled by trivial dlsym hack.
This fixes https://bugs.llvm.org/show_bug.cgi?id=52278
Reviewed By: eugenis, morehouse
Differential Revision: https://reviews.llvm.org/D112588
