src: always clear wrap before persistent Reset()

In case the handle is stored and accessed after the associated C++ class
was destructed, set the internal pointer to nullptr so any
getters/setters can return accordingly without aborting the application.

PR-URL: https://github.com/nodejs/node/pull/6184
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Anna Henningsen <anna@addaleax.net>

src/cares_wrap.cc

@@ -9,6 +9,7 @@
 #include "req-wrap-inl.h"
 #include "tree.h"
 #include "util.h"
+#include "util-inl.h"
 #include "uv.h"
 
 #include <errno.h>
@@ -258,6 +259,7 @@ class QueryWrap : public AsyncWrap {
 
   virtual ~QueryWrap() override {
     CHECK_EQ(false, persistent().IsEmpty());
+    ClearWrap(object());
     persistent().Reset();
   }
 

src/handle_wrap.cc

@@ -98,7 +98,7 @@ void HandleWrap::OnClose(uv_handle_t* handle) {
   if (have_close_callback)
     wrap->MakeCallback(env->onclose_string(), 0, nullptr);
 
-  wrap->object()->SetAlignedPointerInInternalField(0, nullptr);
+  ClearWrap(wrap->object());
   wrap->persistent().Reset();
   delete wrap;
 }

src/node_crypto.cc

@@ -5023,6 +5023,7 @@ class PBKDF2Request : public AsyncWrap {
 
   ~PBKDF2Request() override {
     release();
+    ClearWrap(object());
     persistent().Reset();
   }
 
@@ -5288,6 +5289,7 @@ class RandomBytesRequest : public AsyncWrap {
   }
 
   ~RandomBytesRequest() override {
+    ClearWrap(object());
     persistent().Reset();
   }
 

src/req-wrap-inl.h

@@ -28,6 +28,7 @@ template <typename T>
 ReqWrap<T>::~ReqWrap() {
   CHECK_EQ(req_.data, this);  // Assert that someone has called Dispatched().
   CHECK_EQ(false, persistent().IsEmpty());
+  ClearWrap(object());
   persistent().Reset();
 }