feat: add new render-process-gone event (#24309)

Co-authored-by: Samuel Attard <samuel.r.attard@gmail.com>

docs/api/web-contents.md

@@ -325,7 +325,7 @@ win.webContents.on('will-prevent-unload', (event) => {
 })
 ```
 
-#### Event: 'crashed'
+#### Event: 'crashed' _Deprecated_
 
 Returns:
 
@@ -334,6 +334,29 @@ Returns:
 
 Emitted when the renderer process crashes or is killed.
 
+**Deprecated:** This event is superceded by the `render-process-gone` event
+which contains more information about why the render process dissapeared. It
+isn't always because it crashed.  The `killed` boolean can be replaced by
+checking `reason === 'killed'` when you switch to that event.
+
+#### Event: 'render-process-gone'
+
+Returns:
+
+* `event` Event
+* `details` Object
+  * `reason` String - The reason the render process is gone.  Possible values:
+    * `clean-exit` - Process exited with an exit code of zero
+    * `abnormal-exit` - Process exited with a non-zero exit code
+    * `killed` - Process was sent a SIGTERM or otherwise killed externally
+    * `crashed` - Process crashed
+    * `oom` - Process ran out of memory
+    * `launch-failure` - Process never successfully launched
+    * `integrity-failure` - Windows code integrity checks failed
+
+Emitted when the renderer process unexpectedly dissapears.  This is normally
+because it was crashed or killed.
+
 #### Event: 'unresponsive'
 
 Emitted when the web page becomes unresponsive.

lib/browser/guest-view-manager.js

@@ -32,6 +32,7 @@ const supportedWebViewEvents = [
   'focus-change',
   'close',
   'crashed',
+  'render-process-gone',
   'plugin-crashed',
   'destroyed',
   'page-title-updated',

shell/browser/api/electron_api_web_contents.cc

@@ -991,6 +991,11 @@ void WebContents::RenderViewDeleted(content::RenderViewHost* render_view_host) {
 
 void WebContents::RenderProcessGone(base::TerminationStatus status) {
   Emit("crashed", status == base::TERMINATION_STATUS_PROCESS_WAS_KILLED);
+  v8::HandleScope handle_scope(isolate());
+  gin_helper::Dictionary details =
+      gin_helper::Dictionary::CreateEmpty(isolate());
+  details.Set("reason", status);
+  Emit("render-process-gone", details);
 }
 
 void WebContents::PluginCrashed(const base::FilePath& plugin_path,

shell/browser/api/electron_api_web_contents.h

@@ -60,6 +60,42 @@ namespace network {
 class ResourceRequestBody;
 }
 
+namespace gin {
+
+template <>
+struct Converter<base::TerminationStatus> {
+  static v8::Local<v8::Value> ToV8(v8::Isolate* isolate,
+                                   const base::TerminationStatus& status) {
+    switch (status) {
+      case base::TERMINATION_STATUS_NORMAL_TERMINATION:
+        return gin::ConvertToV8(isolate, "clean-exit");
+      case base::TERMINATION_STATUS_ABNORMAL_TERMINATION:
+        return gin::ConvertToV8(isolate, "abnormal-exit");
+      case base::TERMINATION_STATUS_PROCESS_WAS_KILLED:
+        return gin::ConvertToV8(isolate, "killed");
+      case base::TERMINATION_STATUS_PROCESS_CRASHED:
+        return gin::ConvertToV8(isolate, "crashed");
+      case base::TERMINATION_STATUS_STILL_RUNNING:
+        return gin::ConvertToV8(isolate, "still-running");
+      case base::TERMINATION_STATUS_LAUNCH_FAILED:
+        return gin::ConvertToV8(isolate, "launch-failed");
+      case base::TERMINATION_STATUS_OOM:
+        return gin::ConvertToV8(isolate, "oom");
+#if defined(OS_WIN)
+      case base::TERMINATION_STATUS_INTEGRITY_FAILURE:
+        return gin::ConvertToV8(isolate, "integrity-failure");
+#endif
+      case base::TERMINATION_STATUS_MAX_ENUM:
+        NOTREACHED();
+        return gin::ConvertToV8(isolate, "");
+    }
+    NOTREACHED();
+    return gin::ConvertToV8(isolate, "");
+  }
+};
+
+}  // namespace gin
+
 namespace electron {
 
 class ElectronBrowserContext;