JavaScriptCore.vcxproj/JavaScriptCoreDLL.cpp

   1 /*
   2 * Copyright (C) 2015 Apple Inc.  All rights reserved.
   3 *
   4 * Redistribution and use in source and binary forms, with or without
   5 * modification, are permitted provided that the following conditions
   6 * are met:
   7 * 1. Redistributions of source code must retain the above copyright
   8 *    notice, this list of conditions and the following disclaimer.
   9 * 2. Redistributions in binary form must reproduce the above copyright
  10 *    notice, this list of conditions and the following disclaimer in the
  11 *    documentation and/or other materials provided with the distribution.
  12 *
  13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24 */
  25
  26 #include <Windows.h>
  27 #include <math.h>
  28
  29 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
  30 {
  31     switch (fdwReason) {
  32     case DLL_PROCESS_ATTACH:
  33 #if defined(_M_X64) || defined(__x86_64__)
  34         // The VS2013 runtime has a bug where it mis-detects AVX-capable processors
  35         // if the feature has been disabled in firmware. This causes us to crash
  36         // in some of the math functions. For now, we disable those optimizations
  37         // because Microsoft is not going to fix the problem in VS2013.
  38         // FIXME: http://webkit.org/b/141449: Remove this workaround when we switch to VS2015+.
  39         _set_FMA3_enable(0);
  40 #endif
  41         break;
  42
  43     case DLL_PROCESS_DETACH:
  44     case DLL_THREAD_ATTACH:
  45     case DLL_THREAD_DETACH:
  46         break;
  47     }
  48
  49     return TRUE;
  50 }