[tsan] Export __cxa_guard_ interceptors from TSan runtime. (#171921)
These functions from C++ ABI are defined in
compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp and are supposed to
replace implementations from libstdc++/libc++abi.
We need to export them similar to why we need to export other
interceptors and TSan runtime functions - e.g. if a dlopen-ed shared
library depends on `__cxa_guard_acquire`, it needs to pick up the
exported definition from the TSan runtime that was linked into the main
executable calling the dlopen()
However, because the `__cxa_guard_` functions don't use traditional
interceptor machinery, they are omitted from the auto-generated
`libclang_rt.tsan.a.syms` files. Fix this by adding them to
tsan.syms.extra file explicitly.
Co-authored-by: Vitaly Buka <[email protected]>
NOKEYCHECK=True
GitOrigin-RevId: 8f93365b19e24b70408e40005a77224603c6f9b9
diff --git a/lib/tsan/rtl/tsan.syms.extra b/lib/tsan/rtl/tsan.syms.extra
index 6416e5d..03d17d2 100644
--- a/lib/tsan/rtl/tsan.syms.extra
+++ b/lib/tsan/rtl/tsan.syms.extra
@@ -1,3 +1,6 @@
+__cxa_guard_acquire
+__cxa_guard_abort
+__cxa_guard_release
__tsan_init
__tsan_flush_memory
__tsan_read*
