Preload amdhcp64.dll or amdhcp32.dll before sandbox lockdown.

content/ppapi_plugin/ppapi_thread.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 "content/ppapi_plugin/ppapi_thread.h"
 
 #include <limits>
 
 #include "base/command_line.h"
+#include "base/cpu.h"
 #include "base/debug/crash_logging.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/rand_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/platform_thread.h"
 #include "base/time/time.h"
 #include "content/child/browser_font_resource_trusted.h"
 #include "content/child/child_process.h"
@@ skipping 261 matching lines @@
 
 #if defined(OS_WIN)
   // If code subsequently tries to exit using abort(), force a crash (since
   // otherwise these would be silent terminations and fly under the radar).
   base::win::SetAbortBehaviorForCrashReporting();
 
   // Once we lower the token the sandbox is locked down and no new modules
   // can be loaded. TODO(cpu): consider changing to the loading style of
   // regular plugins.
   if (g_target_services) {
-    // Let Flash load DRM before lockdown on Vista+.
-    if (permissions.HasPermission(ppapi::PERMISSION_FLASH) &&
-        base::win::OSInfo::GetInstance()->version() >=
-        base::win::VERSION_VISTA ) {
-      LoadLibrary(L"dxva2.dll");
+    // Let Flash load DXVA before lockdown on Vista+.
+    if (permissions.HasPermission(ppapi::PERMISSION_FLASH)) {
+      if (base::win::OSInfo::GetInstance()->version() >=
+          base::win::VERSION_VISTA) {
+        LoadLibraryA("dxva2.dll");
+      }
+
+      if (base::win::OSInfo::GetInstance()->version() >=
+          base::win::VERSION_WIN7) {
+        base::CPU cpu;
+        if ((cpu.vendor_name() == "AuthenticAMD") && (cpu.family() > 0x14)) {
+          // The AMD crypto acceleration is only AMD Bulldozer and above.
+#if defined(_WIN64)
+          LoadLibraryA("amdhcp64.dll");
+#else
+          LoadLibraryA("amdhcp32.dll");
+#endif
+        }
+      }
     }
 
     // Cause advapi32 to load before the sandbox is turned on.
     unsigned int dummy_rand;
     rand_s(&dummy_rand);
     // Warm up language subsystems before the sandbox is turned on.
     ::GetUserDefaultLangID();
     ::GetUserDefaultLCID();
 
     if (permissions.HasPermission(ppapi::PERMISSION_FLASH)) {
       // Warm up system locales.
       EnumSystemLocalesW(EnumLocalesProc, LCID_INSTALLED);
     }
-
+    // Engage the sandbox.
     g_target_services->LowerToken();
   }
 #endif
 
   if (is_broker_) {
     // Get the InitializeBroker function (required).
     InitializeBrokerFunc init_broker =
         reinterpret_cast<InitializeBrokerFunc>(
             library.GetFunctionPointer("PPP_InitializeBroker"));
     if (!init_broker) {
@@ skipping 155 matching lines @@
           histogram_name.str(),
           1,
           LOAD_RESULT_MAX,
           LOAD_RESULT_MAX + 1,
           base::HistogramBase::kUmaTargetedHistogramFlag);
 
   histogram->Add(result);
 }
 
 }  // namespace content