src: register external references of SignalWrap for snapshot

PR-URL: #39961
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michael Dawson <midawson@redhat.com>

Author: joyeecheung

src/node_external_reference.h

@@ -72,6 +72,7 @@ class ExternalReferenceRegistry {
   V(serdes)                                                                    \
   V(string_decoder)                                                            \
   V(stream_wrap)                                                               \
+  V(signal_wrap)                                                               \
   V(trace_events)                                                              \
   V(timers)                                                                    \
   V(types)                                                                     \

src/signal_wrap.cc

@@ -22,6 +22,7 @@
 #include "async_wrap-inl.h"
 #include "env-inl.h"
 #include "handle_wrap.h"
+#include "node_external_reference.h"
 #include "node_process-inl.h"
 #include "util-inl.h"
 #include "v8.h"
@@ -62,6 +63,12 @@ class SignalWrap : public HandleWrap {
     env->SetConstructorFunction(target, "Signal", constructor);
   }
 
+  static void RegisterExternalReferences(ExternalReferenceRegistry* registry) {
+    registry->Register(New);
+    registry->Register(Start);
+    registry->Register(Stop);
+  }
+
   SET_NO_MEMORY_INFO()
   SET_MEMORY_INFO_NAME(SignalWrap)
   SET_SELF_SIZE(SignalWrap)
@@ -167,3 +174,5 @@ bool HasSignalJSHandler(int signum) {
 
 
 NODE_MODULE_CONTEXT_AWARE_INTERNAL(signal_wrap, node::SignalWrap::Initialize)
+NODE_MODULE_EXTERNAL_REFERENCE(signal_wrap,
+                               node::SignalWrap::RegisterExternalReferences)