alternative approach

Author: SchrodingerZhu

libc/src/__support/threads/thread.cpp

@@ -166,6 +166,8 @@ void call_atexit_callbacks(ThreadAttributes *attrib) {
   }
 }
 
+void call_atexit_callbacks() { call_atexit_callbacks(self.attrib); }
+
 } // namespace internal
 
 cpp::optional<unsigned int> new_tss_key(TSSDtor *dtor) {

libc/src/stdlib/CMakeLists.txt

@@ -598,7 +598,6 @@ add_entrypoint_object(
   CXX_STANDARD
     20 # For constinit
   DEPENDS
-    libc.src.__support.threads.thread
     .exit_handler
 )
 

libc/src/stdlib/atexit.cpp

@@ -10,7 +10,6 @@
 #include "hdr/types/atexithandler_t.h"
 #include "src/__support/common.h"
 #include "src/__support/macros/config.h"
-#include "src/__support/threads/thread.h"
 #include "src/stdlib/exit_handler.h"
 
 namespace LIBC_NAMESPACE_DECL {
@@ -19,6 +18,10 @@ constinit ExitCallbackList atexit_callbacks;
 Mutex handler_list_mtx(false, false, false, false);
 [[gnu::weak]] extern void teardown_main_tls();
 
+namespace internal {
+[[gnu::weak]] extern void call_atexit_callbacks();
+}
+
 extern "C" {
 
 int __cxa_atexit(AtExitCallback *callback, void *payload, void *) {
@@ -27,7 +30,10 @@ int __cxa_atexit(AtExitCallback *callback, void *payload, void *) {
 
 void __cxa_finalize(void *dso) {
   if (!dso) {
-    internal::call_atexit_callbacks(self.attrib);
+    // cxa callback also need to handle local static destructors.
+    // see
+    // https://refspecs.linuxbase.org/LSB_4.0.0/LSB-Core-generic/LSB-Core-generic/baselib---cxa-finalize.html
+    internal::call_atexit_callbacks();
     call_exit_callbacks(atexit_callbacks);
     if (teardown_main_tls)
       teardown_main_tls();

libc/test/src/__support/threads/linux/CMakeLists.txt

@@ -1,6 +1,5 @@
 add_libc_test(
   raw_mutex_test
-  HERMETIC_TEST_ONLY
   SUITE
     libc-support-threads-tests
   SRCS