Call _set_FMA3_enable(0); to work around VS 2013 CRT AVX bug.

pdf/pdf.cc

 // Copyright (c) 2010 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 "pdf/pdf.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
@@ skipping 38 matching lines @@
 
 BOOL APIENTRY DllMain(HMODULE module, DWORD reason_for_call, LPVOID reserved) {
   g_hmodule = module;
   if (reason_for_call == DLL_PROCESS_ATTACH) {
     // On windows following handlers work only inside module. So breakpad in
     // chrome.dll does not catch that. To avoid linking related code or
     // duplication breakpad_win.cc::InitCrashReporter() just catch errors here
     // and crash in a way interceptable by breakpad of parent module.
     _set_invalid_parameter_handler(HandleInvalidParameter);
     _set_purecall_handler(HandlePureVirtualCall);
+
+#if defined(ARCH_CPU_X86_64) && _MSC_VER <= 1800
+    // VS2013's CRT only checks the existence of FMA3 instructions, not the
+    // enabled-ness of them at the OS level (this is fixed in VS2015). We force
+    // off usage of FMA3 instructions in the CRT to avoid using that path and
+    // hitting illegal instructions when running on CPUs that support FMA3, but
+    // OSs that don't. Because we use the static library CRT we have to call
+    // this function once in each DLL.
+    // See http://crbug.com/436603.
+    _set_FMA3_enable(0);
+#endif  // ARCH_CPU_X86_64

[Lei Zhang, 2014/12/11 19:27:28]

nit: should match #if

   }
   return TRUE;
 }
 
 #endif
 
 namespace pp {
 
 PDF_USED Module* CreateModule() {
   return new chrome_pdf::PDFModule();
@@ skipping 197 matching lines @@
       autorotate);
   bool ret = engine_exports->RenderPDFPageToBitmap(
       pdf_buffer, pdf_buffer_size, page_number, settings, bitmap_buffer);
   if (!g_sdk_initialized_via_pepper) {
     chrome_pdf::ShutdownSDK();
   }
   return ret;
 }
 
 }  // extern "C"