Add callbacks for unresponsive render process (fixes #3661)

The client can optionally wait or terminate the render process.

Expose process exit codes via OnRenderProcessTerminated and
CefGetExitCode (fixes #2126).

cefclient: Add a new https://tests/hang page for testing hang behavior.

cefclient: Move message and resource handling to a new BaseClientHandler
class to support loading of test pages in default Chrome UI windows.

libcef_dll/cpptoc/browser_host_cpptoc.cc

@@ -9,7 +9,7 @@
 // implementations. See the translator.README.txt file in the tools directory
 // for more information.
 //
-// $hash=c1afe37bef47447905f9dc6b6ba56f550e24021f$
+// $hash=790f88d9d22bbef9882470f0980f5e7e446d30c5$
 //
 
 #include "libcef_dll/cpptoc/browser_host_cpptoc.h"
@@ -1506,6 +1506,24 @@ browser_host_execute_chrome_command(struct _cef_browser_host_t* self,
                                                         disposition);
 }
 
+int CEF_CALLBACK
+browser_host_is_render_process_unresponsive(struct _cef_browser_host_t* self) {
+  shutdown_checker::AssertNotShutdown();
+
+  // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
+
+  DCHECK(self);
+  if (!self) {
+    return 0;
+  }
+
+  // Execute
+  bool _retval = CefBrowserHostCppToC::Get(self)->IsRenderProcessUnresponsive();
+
+  // Return type: bool
+  return _retval;
+}
+
 }  // namespace
 
 // CONSTRUCTOR - Do not edit by hand.
@@ -1588,6 +1606,8 @@ CefBrowserHostCppToC::CefBrowserHostCppToC() {
   GetStruct()->can_execute_chrome_command =
       browser_host_can_execute_chrome_command;
   GetStruct()->execute_chrome_command = browser_host_execute_chrome_command;
+  GetStruct()->is_render_process_unresponsive =
+      browser_host_is_render_process_unresponsive;
 }
 
 // DESTRUCTOR - Do not edit by hand.

libcef_dll/cpptoc/request_handler_cpptoc.cc

@@ -9,7 +9,7 @@
 // implementations. See the translator.README.txt file in the tools directory
 // for more information.
 //
-// $hash=4a0c9cb5d77d315e067d07ed633b623a8e12a1fc$
+// $hash=436eb7d254d6edc452b8b529758967d274fa2f85$
 //
 
 #include "libcef_dll/cpptoc/request_handler_cpptoc.h"
@@ -21,6 +21,7 @@
 #include "libcef_dll/ctocpp/request_ctocpp.h"
 #include "libcef_dll/ctocpp/select_client_certificate_callback_ctocpp.h"
 #include "libcef_dll/ctocpp/sslinfo_ctocpp.h"
+#include "libcef_dll/ctocpp/unresponsive_process_callback_ctocpp.h"
 #include "libcef_dll/ctocpp/x509certificate_ctocpp.h"
 #include "libcef_dll/shutdown_checker.h"
 
@@ -345,10 +346,42 @@ request_handler_on_render_view_ready(struct _cef_request_handler_t* self,
       CefBrowserCToCpp::Wrap(browser));
 }
 
-void CEF_CALLBACK request_handler_on_render_process_terminated(
+int CEF_CALLBACK request_handler_on_render_process_unresponsive(
     struct _cef_request_handler_t* self,
     cef_browser_t* browser,
-    cef_termination_status_t status) {
+    struct _cef_unresponsive_process_callback_t* callback) {
+  shutdown_checker::AssertNotShutdown();
+
+  // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
+
+  DCHECK(self);
+  if (!self) {
+    return 0;
+  }
+  // Verify param: browser; type: refptr_diff
+  DCHECK(browser);
+  if (!browser) {
+    return 0;
+  }
+  // Verify param: callback; type: refptr_diff
+  DCHECK(callback);
+  if (!callback) {
+    return 0;
+  }
+
+  // Execute
+  bool _retval =
+      CefRequestHandlerCppToC::Get(self)->OnRenderProcessUnresponsive(
+          CefBrowserCToCpp::Wrap(browser),
+          CefUnresponsiveProcessCallbackCToCpp::Wrap(callback));
+
+  // Return type: bool
+  return _retval;
+}
+
+void CEF_CALLBACK request_handler_on_render_process_responsive(
+    struct _cef_request_handler_t* self,
+    cef_browser_t* browser) {
   shutdown_checker::AssertNotShutdown();
 
   // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
@@ -363,9 +396,40 @@ void CEF_CALLBACK request_handler_on_render_process_terminated(
     return;
   }
 
+  // Execute
+  CefRequestHandlerCppToC::Get(self)->OnRenderProcessResponsive(
+      CefBrowserCToCpp::Wrap(browser));
+}
+
+void CEF_CALLBACK request_handler_on_render_process_terminated(
+    struct _cef_request_handler_t* self,
+    cef_browser_t* browser,
+    cef_termination_status_t status,
+    int error_code,
+    const cef_string_t* error_string) {
+  shutdown_checker::AssertNotShutdown();
+
+  // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
+
+  DCHECK(self);
+  if (!self) {
+    return;
+  }
+  // Verify param: browser; type: refptr_diff
+  DCHECK(browser);
+  if (!browser) {
+    return;
+  }
+  // Verify param: error_string; type: string_byref_const
+  DCHECK(error_string);
+  if (!error_string) {
+    return;
+  }
+
   // Execute
   CefRequestHandlerCppToC::Get(self)->OnRenderProcessTerminated(
-      CefBrowserCToCpp::Wrap(browser), status);
+      CefBrowserCToCpp::Wrap(browser), status, error_code,
+      CefString(error_string));
 }
 
 void CEF_CALLBACK request_handler_on_document_available_in_main_frame(
@@ -404,6 +468,10 @@ CefRequestHandlerCppToC::CefRequestHandlerCppToC() {
   GetStruct()->on_select_client_certificate =
       request_handler_on_select_client_certificate;
   GetStruct()->on_render_view_ready = request_handler_on_render_view_ready;
+  GetStruct()->on_render_process_unresponsive =
+      request_handler_on_render_process_unresponsive;
+  GetStruct()->on_render_process_responsive =
+      request_handler_on_render_process_responsive;
   GetStruct()->on_render_process_terminated =
       request_handler_on_render_process_terminated;
   GetStruct()->on_document_available_in_main_frame =

libcef_dll/cpptoc/unresponsive_process_callback_cpptoc.cc

@@ -0,0 +1,82 @@
+// Copyright (c) 2024 The Chromium Embedded Framework Authors. All rights
+// reserved. Use of this source code is governed by a BSD-style license that
+// can be found in the LICENSE file.
+//
+// ---------------------------------------------------------------------------
+//
+// This file was generated by the CEF translator tool. If making changes by
+// hand only do so within the body of existing method and function
+// implementations. See the translator.README.txt file in the tools directory
+// for more information.
+//
+// $hash=d31cea8b172629a308a7d54f8dd6fccff4cc8823$
+//
+
+#include "libcef_dll/cpptoc/unresponsive_process_callback_cpptoc.h"
+#include "libcef_dll/shutdown_checker.h"
+
+namespace {
+
+// MEMBER FUNCTIONS - Body may be edited by hand.
+
+void CEF_CALLBACK unresponsive_process_callback_wait(
+    struct _cef_unresponsive_process_callback_t* self) {
+  shutdown_checker::AssertNotShutdown();
+
+  // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
+
+  DCHECK(self);
+  if (!self) {
+    return;
+  }
+
+  // Execute
+  CefUnresponsiveProcessCallbackCppToC::Get(self)->Wait();
+}
+
+void CEF_CALLBACK unresponsive_process_callback_terminate(
+    struct _cef_unresponsive_process_callback_t* self) {
+  shutdown_checker::AssertNotShutdown();
+
+  // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
+
+  DCHECK(self);
+  if (!self) {
+    return;
+  }
+
+  // Execute
+  CefUnresponsiveProcessCallbackCppToC::Get(self)->Terminate();
+}
+
+}  // namespace
+
+// CONSTRUCTOR - Do not edit by hand.
+
+CefUnresponsiveProcessCallbackCppToC::CefUnresponsiveProcessCallbackCppToC() {
+  GetStruct()->wait = unresponsive_process_callback_wait;
+  GetStruct()->terminate = unresponsive_process_callback_terminate;
+}
+
+// DESTRUCTOR - Do not edit by hand.
+
+CefUnresponsiveProcessCallbackCppToC::~CefUnresponsiveProcessCallbackCppToC() {
+  shutdown_checker::AssertNotShutdown();
+}
+
+template <>
+CefRefPtr<CefUnresponsiveProcessCallback>
+CefCppToCRefCounted<CefUnresponsiveProcessCallbackCppToC,
+                    CefUnresponsiveProcessCallback,
+                    cef_unresponsive_process_callback_t>::
+    UnwrapDerived(CefWrapperType type, cef_unresponsive_process_callback_t* s) {
+  DCHECK(false) << "Unexpected class type: " << type;
+  return nullptr;
+}
+
+template <>
+CefWrapperType
+    CefCppToCRefCounted<CefUnresponsiveProcessCallbackCppToC,
+                        CefUnresponsiveProcessCallback,
+                        cef_unresponsive_process_callback_t>::kWrapperType =
+        WT_UNRESPONSIVE_PROCESS_CALLBACK;

libcef_dll/cpptoc/unresponsive_process_callback_cpptoc.h

@@ -0,0 +1,38 @@
+// Copyright (c) 2024 The Chromium Embedded Framework Authors. All rights
+// reserved. Use of this source code is governed by a BSD-style license that
+// can be found in the LICENSE file.
+//
+// ---------------------------------------------------------------------------
+//
+// This file was generated by the CEF translator tool. If making changes by
+// hand only do so within the body of existing method and function
+// implementations. See the translator.README.txt file in the tools directory
+// for more information.
+//
+// $hash=1816748407afd5599d8582de51b3289d1ea24a33$
+//
+
+#ifndef CEF_LIBCEF_DLL_CPPTOC_UNRESPONSIVE_PROCESS_CALLBACK_CPPTOC_H_
+#define CEF_LIBCEF_DLL_CPPTOC_UNRESPONSIVE_PROCESS_CALLBACK_CPPTOC_H_
+#pragma once
+
+#if !defined(BUILDING_CEF_SHARED)
+#error This file can be included DLL-side only
+#endif
+
+#include "include/capi/cef_unresponsive_process_callback_capi.h"
+#include "include/cef_unresponsive_process_callback.h"
+#include "libcef_dll/cpptoc/cpptoc_ref_counted.h"
+
+// Wrap a C++ class with a C structure.
+// This class may be instantiated and accessed DLL-side only.
+class CefUnresponsiveProcessCallbackCppToC
+    : public CefCppToCRefCounted<CefUnresponsiveProcessCallbackCppToC,
+                                 CefUnresponsiveProcessCallback,
+                                 cef_unresponsive_process_callback_t> {
+ public:
+  CefUnresponsiveProcessCallbackCppToC();
+  virtual ~CefUnresponsiveProcessCallbackCppToC();
+};
+
+#endif  // CEF_LIBCEF_DLL_CPPTOC_UNRESPONSIVE_PROCESS_CALLBACK_CPPTOC_H_