[win] Enable ModuleDatabase behind a flag.

chrome/browser/chrome_browser_main_win.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chrome_browser_main_win.h"
 
 #include <shellapi.h>
 #include <stddef.h>
+#include <stdint.h>
 #include <windows.h>
 
 #include <algorithm>
 #include <memory>
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/environment.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/i18n/rtl.h"
 #include "base/location.h"
 #include "base/macros.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/path_service.h"
 #include "base/scoped_native_library.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/win/pe_image.h"
 #include "base/win/registry.h"
 #include "base/win/win_util.h"
 #include "base/win/windows_version.h"
 #include "base/win/wrapped_window_proc.h"
+#include "chrome/browser/conflicts/module_database_win.h"
+#include "chrome/browser/conflicts/module_event_sink_impl_win.h"
 #include "chrome/browser/first_run/first_run.h"
 #include "chrome/browser/install_verification/win/install_verification.h"
 #include "chrome/browser/profiles/profile_shortcut_manager.h"
 #include "chrome/browser/shell_integration.h"
 #include "chrome/browser/ui/simple_message_box.h"
 #include "chrome/browser/ui/uninstall_browser_prompt.h"
 #include "chrome/browser/win/browser_util.h"
 #include "chrome/browser/win/chrome_elf_init.h"
 #include "chrome/chrome_watcher/chrome_watcher_main_api.h"
 #include "chrome/common/chrome_constants.h"
+#include "chrome/common/chrome_features.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_result_codes.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/chrome_utility_messages.h"
 #include "chrome/common/crash_keys.h"
 #include "chrome/common/env_vars.h"
 #include "chrome/grit/chromium_strings.h"
 #include "chrome/grit/generated_resources.h"
 #include "chrome/installer/util/browser_distribution.h"
 #include "chrome/installer/util/helper.h"
@@ skipping 143 matching lines @@
 
   // Look for the DLLs used to implement the FTH and other compat hacks.
   if (GetModuleHandleW(L"AcLayers.dll") != NULL)
     detected = static_cast<FTHFlags>(detected | FTH_ACLAYERS_LOADED);
   if (GetModuleHandleW(L"AcXtrnal.dll") != NULL)
     detected = static_cast<FTHFlags>(detected | FTH_ACXTRNAL_LOADED);
 
   UMA_HISTOGRAM_ENUMERATION("FaultTolerantHeap", detected, FTH_FLAGS_COUNT);
 }
 
+// Helper function for getting the time date stamp associated with a module in
+// this process.
+uint32_t GetModuleTimeDateStamp(const void* module_load_address) {
+  base::win::PEImage pe_image(module_load_address);
+  return pe_image.GetNTHeaders()->FileHeader.TimeDateStamp;
+}
+
+// Used as the callback for ModuleWatcher events in this process. Dispatches
+// them to the ModuleDatabase.
+void OnModuleEvent(uint32_t process_id,
+                   uint64_t creation_time,
+                   const ModuleWatcher::ModuleEvent& event) {
+  auto* module_database = ModuleDatabase::GetInstance();
+  uintptr_t load_address =
+      reinterpret_cast<uintptr_t>(event.module_load_address);
+
+  switch (event.event_type) {
+    case mojom::ModuleEventType::MODULE_ALREADY_LOADED:
+    case mojom::ModuleEventType::MODULE_LOADED: {
+      module_database->OnModuleLoad(
+          process_id, creation_time, event.module_path, event.module_size,
+          GetModuleTimeDateStamp(event.module_load_address), load_address);
+      return;
+    }
+
+    case mojom::ModuleEventType::MODULE_UNLOADED: {
+      module_database->OnModuleUnload(process_id, creation_time, load_address);
+      return;
+    }
+  }
+}
+
+// Helper function for initializing the module database subsystem. Populates
+// the provided |module_watcher|.
+void SetupModuleDatabase(std::unique_ptr<ModuleWatcher>* module_watcher) {
+  uint64_t creation_time = 0;
+  ModuleEventSinkImpl::GetProcessCreationTime(::GetCurrentProcess(),
+                                              &creation_time);
+  ModuleDatabase::SetInstance(base::MakeUnique<ModuleDatabase>(
+      content::BrowserThread::GetTaskRunnerForThread(
+          content::BrowserThread::UI)));
+  auto* module_database = ModuleDatabase::GetInstance();
+  uint32_t process_id = ::GetCurrentProcessId();
+
+  // The ModuleWatcher will immediately start emitting module events, but the
+  // ModuleDatabase expects an OnProcessStarted event prior to that. For child
+  // processes this is handled via the ModuleEventSinkImpl. For the browser
+  // process a manual notification is sent before wiring up the ModuleWatcher.
+  module_database->OnProcessStarted(process_id, creation_time,
+                                    content::PROCESS_TYPE_BROWSER);
+  *module_watcher = ModuleWatcher::Create(
+      base::Bind(&OnModuleEvent, process_id, creation_time));
+}
+
 }  // namespace
 
 void ShowCloseBrowserFirstMessageBox() {
   int message_id = IDS_UNINSTALL_CLOSE_APP;
   if (base::win::GetVersion() >= base::win::VERSION_WIN8 &&
       (shell_integration::GetDefaultBrowser() ==
        shell_integration::IS_DEFAULT)) {
     message_id = IDS_UNINSTALL_CLOSE_APP_IMMERSIVE;
   }
   chrome::ShowWarningMessageBox(NULL,
@@ skipping 104 matching lines @@
   ChromeBrowserMainParts::PostProfileInit();
 
   // TODO(kulshin): remove this cleanup code in 2017. http://crbug.com/603718
   // Attempt to delete the font cache and ignore any errors.
   base::FilePath path(
       profile()->GetPath().AppendASCII("ChromeDWriteFontCache"));
   content::BrowserThread::PostAfterStartupTask(
       FROM_HERE, content::BrowserThread::GetTaskRunnerForThread(
                      content::BrowserThread::FILE),
       base::Bind(base::IgnoreResult(&base::DeleteFile), path, false));
+
+  // Create the module database and hook up the in-process module watcher. This
+  // needs to be done before any child processes are initialized as the
+  // ModuleDatabase is an endpoint for IPC from child processes.
+  if (base::FeatureList::IsEnabled(features::kModuleDatabase))
+    SetupModuleDatabase(&module_watcher_);
 }
 
 void ChromeBrowserMainPartsWin::PostBrowserStart() {
   ChromeBrowserMainParts::PostBrowserStart();
 
   UMA_HISTOGRAM_BOOLEAN("Windows.Tablet", base::win::IsTabletDevice(nullptr));
 
   // Set up a task to verify installed modules in the current process.
   content::BrowserThread::PostAfterStartupTask(
       FROM_HERE, content::BrowserThread::GetBlockingPool(),
@@ skipping 186 matching lines @@
   if (resource_id)
     return l10n_util::GetStringUTF16(resource_id);
   return base::string16();
 }
 
 // static
 void ChromeBrowserMainPartsWin::SetupInstallerUtilStrings() {
   CR_DEFINE_STATIC_LOCAL(TranslationDelegate, delegate, ());
   installer::SetTranslationDelegate(&delegate);
 }