Mark await expressions as caught or uncaught

src/isolate.cc

 // Copyright 2012 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/isolate.h"
 
 #include <stdlib.h>
 
 #include <fstream>  // NOLINT(readability/streams)
 #include <sstream>
@@ skipping 1293 matching lines @@
     // For JSEntryStub frames we update the JS_ENTRY handler.
     if (frame->is_entry() || frame->is_entry_construct()) {
       entry_handler = frame->top_handler()->next()->address();
     }
 
     // For JavaScript frames we perform a lookup in the handler table.
     if (frame->is_java_script()) {
       JavaScriptFrame* js_frame = static_cast<JavaScriptFrame*>(frame);
       HandlerTable::CatchPrediction prediction = PredictException(js_frame);
       if (prediction == HandlerTable::DESUGARING) return CAUGHT_BY_DESUGARING;
+      if (prediction == HandlerTable::ASYNC_AWAIT) return CAUGHT_BY_ASYNC_AWAIT;
+      if (prediction == HandlerTable::PROMISE) return CAUGHT_BY_PROMISE;
       if (prediction != HandlerTable::UNCAUGHT) return CAUGHT_BY_JAVASCRIPT;
     }
 
     // The exception has been externally caught if and only if there is an
     // external handler which is on top of the top-most JS_ENTRY handler.
     if (external_handler != nullptr && !try_catch_handler()->is_verbose_) {
       if (entry_handler == nullptr || entry_handler > external_handler) {
         return CAUGHT_BY_EXTERNAL;
       }
     }
@@ skipping 383 matching lines @@
   ThreadLocalTop* tltop = thread_local_top();
   if (tltop->promise_on_stack_ == NULL) return undefined;
   // Find the top-most try-catch or try-finally handler.
   CatchType prediction = PredictExceptionCatcher();
   if (prediction == NOT_CAUGHT || prediction == CAUGHT_BY_EXTERNAL) {
     return undefined;
   }
   for (JavaScriptFrameIterator it(this); !it.done(); it.Advance()) {
     switch (PredictException(it.frame())) {
       case HandlerTable::UNCAUGHT:
+      case HandlerTable::ASYNC_AWAIT:
         break;
       case HandlerTable::CAUGHT:
       case HandlerTable::DESUGARING:
         return undefined;
       case HandlerTable::PROMISE:
         return tltop->promise_on_stack_->promise();
     }
   }
   return undefined;
 }
@@ skipping 1436 matching lines @@
   // Then check whether this scope intercepts.
   if ((flag & intercept_mask_)) {
     intercepted_flags_ |= flag;
     return true;
   }
   return false;
 }
 
 }  // namespace internal
 }  // namespace v8