Add missing part

Author: vgvassilev

lib/Interpreter/CppInterOp.cpp

@@ -85,13 +85,6 @@ int find_dynamic_unwind_sections(uintptr_t addr,
 typedef int (*unw_find_dynamic_unwind_sections)(
     uintptr_t addr, struct unw_dynamic_unwind_sections* info);
 
-void removeFindDynamicUnwindSections() {
-  if (auto* unw_remove_find_dynamic_unwind_sections = (int (*)(
-          unw_find_dynamic_unwind_sections find_dynamic_unwind_sections))
-          dlsym(RTLD_DEFAULT, "__unw_remove_find_dynamic_unwind_sections"))
-    unw_remove_find_dynamic_unwind_sections(find_dynamic_unwind_sections);
-}
-
 #endif // __APPLE__
 
 namespace Cpp {
@@ -109,7 +102,10 @@ namespace Cpp {
   struct InterpDeleter {
     ~InterpDeleter() {
 #ifdef __APPLE__
-      removeFindDynamicUnwindSections();
+      if (auto* unw_remove_find_dynamic_unwind_sections = (int (*)(
+              unw_find_dynamic_unwind_sections find_dynamic_unwind_sections))
+              dlsym(RTLD_DEFAULT, "__unw_remove_find_dynamic_unwind_sections"))
+        unw_remove_find_dynamic_unwind_sections(find_dynamic_unwind_sections);
 #endif
       sInterpreter.release();
     }
@@ -2652,6 +2648,14 @@ namespace Cpp {
     // FIXME: Enable this assert once we figure out how to fix the multiple
     // calls to CreateInterpreter.
     //assert(!sInterpreter && "Interpreter already set.");
+#ifdef __APPLE__
+    // Add a handler to support exceptions from interpreted code.
+    // See llvm/llvm-project#49036
+    if (auto* unw_add_find_dynamic_unwind_sections = (int (*)(
+            unw_find_dynamic_unwind_sections find_dynamic_unwind_sections))
+            dlsym(RTLD_DEFAULT, "__unw_add_find_dynamic_unwind_sections"))
+      unw_add_find_dynamic_unwind_sections(find_dynamic_unwind_sections);
+#endif // __APPLE__
     sInterpreter.reset(I);
     return I;
   }