chrome/split_dll_fake_entry.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include <windows.h>
   6
   7 extern "C" {
   8
   9 // This entry point and file is used to work around circular dependencies
  10 // between the split DLLs. The CRT initialization will fail if done at attach
  11 // time. Instead, we defer initialization until after both DLLs are loaded and
  12 // then manually call the CRT initialization function (via DoDeferredCrtInit).
  13 //
  14 // ChromeEmptyEntry is the DLL's entry point.
  15
  16 BOOL WINAPI _DllMainCRTStartup(HINSTANCE, DWORD, LPVOID);
  17
  18 BOOL WINAPI ChromeEmptyEntry(HINSTANCE hinstance,
  19                              DWORD reason,
  20                              LPVOID reserved) {
  21   if (reason != DLL_PROCESS_ATTACH)
  22     _DllMainCRTStartup(hinstance, reason, reserved);
  23   return 1;
  24 }
  25
  26 __declspec(dllexport) void __stdcall DoDeferredCrtInit(HINSTANCE hinstance) {
  27   _DllMainCRTStartup(hinstance, DLL_PROCESS_ATTACH, NULL);
  28 }
  29
  30 // This function is needed for the linker to succeed. It seems to pick the
  31 // CRT lib based on the existence of "DllMain", and since we're renaming that,
  32 // it instead chooses the one that links against "main". This function should
  33 // never be called.
  34 int main() {
  35   __debugbreak();
  36 }
  37
  38 }