src: replace handle dereference with ContainerOf

HarshithaKP · targos · commit 41553580318a · 2020-04-22T18:34:45.000+02:00
this was influenced by #32269 PR-URL: #32298 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com>
diff --git a/src/process_wrap.cc b/src/process_wrap.cc
@@ -291,8 +291,7 @@ class ProcessWrap : public HandleWrap {
   static void OnExit(uv_process_t* handle,
                      int64_t exit_status,
                      int term_signal) {
-    ProcessWrap* wrap = static_cast<ProcessWrap*>(handle->data);
-    CHECK_NOT_NULL(wrap);
+    ProcessWrap* wrap = ContainerOf(&ProcessWrap::process_, handle);
     CHECK_EQ(&wrap->process_, handle);
 
     Environment* env = wrap->env();
