Delegate throwing in RegExpExecStub to CEntryStub.

src/runtime/runtime-regexp.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/arguments.h"
 #include "src/jsregexp-inl.h"
 #include "src/jsregexp.h"
 #include "src/runtime/runtime-utils.h"
@@ skipping 1092 matching lines @@
   if (regexp->CaptureCount() == 0) {
     return SearchRegExpMultiple<false>(isolate, subject, regexp,
                                        last_match_info, result_array);
   } else {
     return SearchRegExpMultiple<true>(isolate, subject, regexp, last_match_info,
                                       result_array);
   }
 }
 
 
+RUNTIME_FUNCTION(Runtime_RegExpExecReThrow) {
+  SealHandleScope shs(isolate);
+  DCHECK(args.length() == 4);
+  Object* exception = isolate->pending_exception();
+  isolate->clear_pending_exception();
+  return isolate->ReThrow(exception);
+}
+
+
 RUNTIME_FUNCTION(Runtime_IsRegExp) {
   SealHandleScope shs(isolate);
   DCHECK(args.length() == 1);
   CONVERT_ARG_CHECKED(Object, obj, 0);
   return isolate->heap()->ToBoolean(obj->IsJSRegExp());
 }
 }
 }  // namespace v8::internal