move the EXIT_CALLED check before every __deregister_frame call

Author: marxin

lib/compiler/src/engine/unwind/systemv.rs

@@ -255,13 +255,6 @@ extern "C" fn atexit_handler() {
 
 impl Drop for UnwindRegistry {
     fn drop(&mut self) {
-        // We don't want to deregister frames in UnwindRegistry::Drop as that could be called during
-        // program shutdown and can collide with release_registered_frames and lead to
-        // crashes.
-        if EXIT_CALLED.load(Ordering::SeqCst) {
-            return;
-        }
-
         if self.published {
             unsafe {
                 // libgcc stores the frame entries as a linked list in decreasing sort order
@@ -281,6 +274,12 @@ impl Drop for UnwindRegistry {
 
                     #[cfg(not(all(target_os = "macos", target_arch = "aarch64")))]
                     {
+                        // We don't want to deregister frames in UnwindRegistry::Drop as that could be called during
+                        // program shutdown and can collide with release_registered_frames and lead to
+                        // crashes.
+                        if EXIT_CALLED.load(Ordering::SeqCst) {
+                            return;
+                        }
                         __deregister_frame(*registration as *const _);
                     }
                 }