Add a shared memory variant of CefProcessMessage (fixes issue #3126)

CefSharedProcessMessageBuilder supports creation of a CefProcessMessage
backed by a CefSharedMemoryRegion.

Performance tests comparing the existing ArgumentList approach and the new
SharedMemoryRegion approach have been added to cefclient at
http://tests/ipc_performance.

CefMessageRouter has been updated to use SharedMemoryRegion as transport
for larger message payloads. The threshold is configurable via
|CefMessageRouterConfig.message_size_threshold|.

To test:
run `ceftests --gtest_filter=SendSharedProcessMessageTest.*:SharedProcessMessageTest.*:MessageRouterTest.Threshold*`

libcef_dll/cpptoc/process_message_cpptoc.cc

@@ -9,11 +9,12 @@
 // implementations. See the translator.README.txt file in the tools directory
 // for more information.
 //
-// $hash=b63f665e68e4dc6269c3e88b81068190ea90abb3$
+// $hash=5d331596c0425f145a19d8de6a866841d9ed8a87$
 //
 
 #include "libcef_dll/cpptoc/process_message_cpptoc.h"
 #include "libcef_dll/cpptoc/list_value_cpptoc.h"
+#include "libcef_dll/cpptoc/shared_memory_region_cpptoc.h"
 #include "libcef_dll/shutdown_checker.h"
 
 // GLOBAL FUNCTIONS - Body may be edited by hand.
@@ -127,6 +128,24 @@ process_message_get_argument_list(struct _cef_process_message_t* self) {
   return CefListValueCppToC::Wrap(_retval);
 }
 
+struct _cef_shared_memory_region_t* CEF_CALLBACK
+process_message_get_shared_memory_region(struct _cef_process_message_t* self) {
+  shutdown_checker::AssertNotShutdown();
+
+  // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
+
+  DCHECK(self);
+  if (!self)
+    return NULL;
+
+  // Execute
+  CefRefPtr<CefSharedMemoryRegion> _retval =
+      CefProcessMessageCppToC::Get(self)->GetSharedMemoryRegion();
+
+  // Return type: refptr_same
+  return CefSharedMemoryRegionCppToC::Wrap(_retval);
+}
+
 }  // namespace
 
 // CONSTRUCTOR - Do not edit by hand.
@@ -137,6 +156,8 @@ CefProcessMessageCppToC::CefProcessMessageCppToC() {
   GetStruct()->copy = process_message_copy;
   GetStruct()->get_name = process_message_get_name;
   GetStruct()->get_argument_list = process_message_get_argument_list;
+  GetStruct()->get_shared_memory_region =
+      process_message_get_shared_memory_region;
 }
 
 // DESTRUCTOR - Do not edit by hand.

libcef_dll/cpptoc/shared_memory_region_cpptoc.cc

@@ -0,0 +1,105 @@
+// Copyright (c) 2022 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.
+//
+// $hash=b8c6bf91bf16cb696121e7d304c21fbcdc927ffd$
+//
+
+#include "libcef_dll/cpptoc/shared_memory_region_cpptoc.h"
+#include "libcef_dll/shutdown_checker.h"
+
+namespace {
+
+// MEMBER FUNCTIONS - Body may be edited by hand.
+
+int CEF_CALLBACK
+shared_memory_region_is_valid(struct _cef_shared_memory_region_t* self) {
+  shutdown_checker::AssertNotShutdown();
+
+  // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
+
+  DCHECK(self);
+  if (!self)
+    return 0;
+
+  // Execute
+  bool _retval = CefSharedMemoryRegionCppToC::Get(self)->IsValid();
+
+  // Return type: bool
+  return _retval;
+}
+
+size_t CEF_CALLBACK
+shared_memory_region_size(struct _cef_shared_memory_region_t* self) {
+  shutdown_checker::AssertNotShutdown();
+
+  // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
+
+  DCHECK(self);
+  if (!self)
+    return 0;
+
+  // Execute
+  size_t _retval = CefSharedMemoryRegionCppToC::Get(self)->Size();
+
+  // Return type: simple
+  return _retval;
+}
+
+const void* CEF_CALLBACK
+shared_memory_region_memory(struct _cef_shared_memory_region_t* self) {
+  shutdown_checker::AssertNotShutdown();
+
+  shutdown_checker::AssertNotShutdown();
+
+  // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
+
+  DCHECK(self);
+  if (!self)
+    return 0;
+
+  // Execute
+  const void* _retval = CefSharedMemoryRegionCppToC::Get(self)->Memory();
+
+  // Return type: simple
+  return _retval;
+}
+
+}  // namespace
+
+// CONSTRUCTOR - Do not edit by hand.
+
+CefSharedMemoryRegionCppToC::CefSharedMemoryRegionCppToC() {
+  GetStruct()->is_valid = shared_memory_region_is_valid;
+  GetStruct()->size = shared_memory_region_size;
+  GetStruct()->memory = shared_memory_region_memory;
+}
+
+// DESTRUCTOR - Do not edit by hand.
+
+CefSharedMemoryRegionCppToC::~CefSharedMemoryRegionCppToC() {
+  shutdown_checker::AssertNotShutdown();
+}
+
+template <>
+CefRefPtr<CefSharedMemoryRegion> CefCppToCRefCounted<
+    CefSharedMemoryRegionCppToC,
+    CefSharedMemoryRegion,
+    cef_shared_memory_region_t>::UnwrapDerived(CefWrapperType type,
+                                               cef_shared_memory_region_t* s) {
+  NOTREACHED() << "Unexpected class type: " << type;
+  return nullptr;
+}
+
+template <>
+CefWrapperType CefCppToCRefCounted<CefSharedMemoryRegionCppToC,
+                                   CefSharedMemoryRegion,
+                                   cef_shared_memory_region_t>::kWrapperType =
+    WT_SHARED_MEMORY_REGION;

libcef_dll/cpptoc/shared_memory_region_cpptoc.h

@@ -0,0 +1,38 @@
+// Copyright (c) 2022 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.
+//
+// $hash=77de7d9d9e62fa5075ff6e76e4647639c51a7f05$
+//
+
+#ifndef CEF_LIBCEF_DLL_CPPTOC_SHARED_MEMORY_REGION_CPPTOC_H_
+#define CEF_LIBCEF_DLL_CPPTOC_SHARED_MEMORY_REGION_CPPTOC_H_
+#pragma once
+
+#if !defined(BUILDING_CEF_SHARED)
+#error This file can be included DLL-side only
+#endif
+
+#include "include/capi/cef_shared_memory_region_capi.h"
+#include "include/cef_shared_memory_region.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 CefSharedMemoryRegionCppToC
+    : public CefCppToCRefCounted<CefSharedMemoryRegionCppToC,
+                                 CefSharedMemoryRegion,
+                                 cef_shared_memory_region_t> {
+ public:
+  CefSharedMemoryRegionCppToC();
+  virtual ~CefSharedMemoryRegionCppToC();
+};
+
+#endif  // CEF_LIBCEF_DLL_CPPTOC_SHARED_MEMORY_REGION_CPPTOC_H_

libcef_dll/cpptoc/shared_process_message_builder_cpptoc.cc

@@ -0,0 +1,145 @@
+// Copyright (c) 2022 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.
+//
+// $hash=b3c3551c52baf66ab3cd4ee485313ef41a29313b$
+//
+
+#include "libcef_dll/cpptoc/shared_process_message_builder_cpptoc.h"
+#include "libcef_dll/cpptoc/process_message_cpptoc.h"
+#include "libcef_dll/shutdown_checker.h"
+
+// GLOBAL FUNCTIONS - Body may be edited by hand.
+
+CEF_EXPORT cef_shared_process_message_builder_t*
+cef_shared_process_message_builder_create(const cef_string_t* name,
+                                          size_t byte_size) {
+  shutdown_checker::AssertNotShutdown();
+
+  // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
+
+  // Verify param: name; type: string_byref_const
+  DCHECK(name);
+  if (!name)
+    return NULL;
+
+  // Execute
+  CefRefPtr<CefSharedProcessMessageBuilder> _retval =
+      CefSharedProcessMessageBuilder::Create(CefString(name), byte_size);
+
+  // Return type: refptr_same
+  return CefSharedProcessMessageBuilderCppToC::Wrap(_retval);
+}
+
+namespace {
+
+// MEMBER FUNCTIONS - Body may be edited by hand.
+
+int CEF_CALLBACK shared_process_message_builder_is_valid(
+    struct _cef_shared_process_message_builder_t* self) {
+  shutdown_checker::AssertNotShutdown();
+
+  // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
+
+  DCHECK(self);
+  if (!self)
+    return 0;
+
+  // Execute
+  bool _retval = CefSharedProcessMessageBuilderCppToC::Get(self)->IsValid();
+
+  // Return type: bool
+  return _retval;
+}
+
+size_t CEF_CALLBACK shared_process_message_builder_size(
+    struct _cef_shared_process_message_builder_t* self) {
+  shutdown_checker::AssertNotShutdown();
+
+  // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
+
+  DCHECK(self);
+  if (!self)
+    return 0;
+
+  // Execute
+  size_t _retval = CefSharedProcessMessageBuilderCppToC::Get(self)->Size();
+
+  // Return type: simple
+  return _retval;
+}
+
+void* CEF_CALLBACK shared_process_message_builder_memory(
+    struct _cef_shared_process_message_builder_t* self) {
+  shutdown_checker::AssertNotShutdown();
+
+  DCHECK(self);
+  if (!self)
+    return 0;
+
+  // Execute
+  void* _retval = CefSharedProcessMessageBuilderCppToC::Get(self)->Memory();
+
+  // Return type: simple
+  return _retval;
+}
+
+cef_process_message_t* CEF_CALLBACK shared_process_message_builder_build(
+    struct _cef_shared_process_message_builder_t* self) {
+  shutdown_checker::AssertNotShutdown();
+
+  // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
+
+  DCHECK(self);
+  if (!self)
+    return NULL;
+
+  // Execute
+  CefRefPtr<CefProcessMessage> _retval =
+      CefSharedProcessMessageBuilderCppToC::Get(self)->Build();
+
+  // Return type: refptr_same
+  return CefProcessMessageCppToC::Wrap(_retval);
+}
+
+}  // namespace
+
+// CONSTRUCTOR - Do not edit by hand.
+
+CefSharedProcessMessageBuilderCppToC::CefSharedProcessMessageBuilderCppToC() {
+  GetStruct()->is_valid = shared_process_message_builder_is_valid;
+  GetStruct()->size = shared_process_message_builder_size;
+  GetStruct()->memory = shared_process_message_builder_memory;
+  GetStruct()->build = shared_process_message_builder_build;
+}
+
+// DESTRUCTOR - Do not edit by hand.
+
+CefSharedProcessMessageBuilderCppToC::~CefSharedProcessMessageBuilderCppToC() {
+  shutdown_checker::AssertNotShutdown();
+}
+
+template <>
+CefRefPtr<CefSharedProcessMessageBuilder>
+CefCppToCRefCounted<CefSharedProcessMessageBuilderCppToC,
+                    CefSharedProcessMessageBuilder,
+                    cef_shared_process_message_builder_t>::
+    UnwrapDerived(CefWrapperType type,
+                  cef_shared_process_message_builder_t* s) {
+  NOTREACHED() << "Unexpected class type: " << type;
+  return nullptr;
+}
+
+template <>
+CefWrapperType
+    CefCppToCRefCounted<CefSharedProcessMessageBuilderCppToC,
+                        CefSharedProcessMessageBuilder,
+                        cef_shared_process_message_builder_t>::kWrapperType =
+        WT_SHARED_PROCESS_MESSAGE_BUILDER;

libcef_dll/cpptoc/shared_process_message_builder_cpptoc.h

@@ -0,0 +1,38 @@
+// Copyright (c) 2022 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.
+//
+// $hash=a3ec0a78d1e092d99780b6ec87d345a20c081be6$
+//
+
+#ifndef CEF_LIBCEF_DLL_CPPTOC_SHARED_PROCESS_MESSAGE_BUILDER_CPPTOC_H_
+#define CEF_LIBCEF_DLL_CPPTOC_SHARED_PROCESS_MESSAGE_BUILDER_CPPTOC_H_
+#pragma once
+
+#if !defined(BUILDING_CEF_SHARED)
+#error This file can be included DLL-side only
+#endif
+
+#include "include/capi/cef_shared_process_message_builder_capi.h"
+#include "include/cef_shared_process_message_builder.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 CefSharedProcessMessageBuilderCppToC
+    : public CefCppToCRefCounted<CefSharedProcessMessageBuilderCppToC,
+                                 CefSharedProcessMessageBuilder,
+                                 cef_shared_process_message_builder_t> {
+ public:
+  CefSharedProcessMessageBuilderCppToC();
+  virtual ~CefSharedProcessMessageBuilderCppToC();
+};
+
+#endif  // CEF_LIBCEF_DLL_CPPTOC_SHARED_PROCESS_MESSAGE_BUILDER_CPPTOC_H_