Add a convenience method to get the debugged context

src/api.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/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 8106 matching lines @@
   i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
   ENTER_V8(i_isolate);
   return Utils::ToLocal(i_isolate->debug()->GetDebugContext());
 }
 
 
 Local<Context> Debug::GetDebugContext() {
   return GetDebugContext(reinterpret_cast<Isolate*>(i::Isolate::Current()));
 }
 
+MaybeLocal<Context> Debug::GetDebuggedContext(Isolate* isolate) {
+  i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
+  ENTER_V8(i_isolate);
+  if (!i_isolate->debug()->in_debug_scope()) return MaybeLocal<Context>();
+  i::Handle<i::Object> calling = i_isolate->GetCallingNativeContext();
+  if (calling.is_null()) return MaybeLocal<Context>();
+  return Utils::ToLocal(i::Handle<i::Context>::cast(calling));
+}
 
 void Debug::SetLiveEditEnabled(Isolate* isolate, bool enable) {
   i::Isolate* internal_isolate = reinterpret_cast<i::Isolate*>(isolate);
   internal_isolate->debug()->set_live_edit_enabled(enable);
 }
 
 bool Debug::IsTailCallEliminationEnabled(Isolate* isolate) {
   i::Isolate* internal_isolate = reinterpret_cast<i::Isolate*>(isolate);
   return internal_isolate->is_tail_call_elimination_enabled();
 }
@@ skipping 680 matching lines @@
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 }  // namespace internal
 }  // namespace v8