[debug] implement intuitive semantics for stepping over await call.

src/external-reference-table.cc

 // Copyright 2016 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/external-reference-table.h"
 
 #include "src/accessors.h"
 #include "src/assembler.h"
 #include "src/counters.h"
 #include "src/deoptimizer.h"
@@ skipping 171 matching lines @@
           .address(),
       "Isolate::is_tail_call_elimination_enabled_address()");
 
   // Debug addresses
   Add(ExternalReference::debug_after_break_target_address(isolate).address(),
       "Debug::after_break_target_address()");
   Add(ExternalReference::debug_is_active_address(isolate).address(),
       "Debug::is_active_address()");
   Add(ExternalReference::debug_step_in_enabled_address(isolate).address(),
       "Debug::step_in_enabled_address()");
+  Add(ExternalReference::debug_suspended_generator_address(isolate).address(),
+      "Debug::step_suspended_generator_address()");
 
 #ifndef V8_INTERPRETED_REGEXP
   Add(ExternalReference::re_case_insensitive_compare_uc16(isolate).address(),
       "NativeRegExpMacroAssembler::CaseInsensitiveCompareUC16()");
   Add(ExternalReference::re_check_stack_guard_state(isolate).address(),
       "RegExpMacroAssembler*::CheckStackGuardState()");
   Add(ExternalReference::re_grow_stack(isolate).address(),
       "NativeRegExpMacroAssembler::GrowStack()");
   Add(ExternalReference::re_word_character_map().address(),
       "NativeRegExpMacroAssembler::word_character_map");
@@ skipping 159 matching lines @@
   for (int entry = 0; entry < kDeoptTableSerializeEntryCount; ++entry) {
     Address address = Deoptimizer::GetDeoptimizationEntry(
         isolate, entry, Deoptimizer::LAZY,
         Deoptimizer::CALCULATE_ENTRY_ADDRESS);
     Add(address, "lazy_deopt");
   }
 }
 
 }  // namespace internal
 }  // namespace v8