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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include <windows.h>
#include <delayimp.h>
#include "nsToolkit.h"
#include "mozilla/Assertions.h"
#if defined(__GNUC__)
// If DllMain gets name mangled, it won't be seen.
extern "C" {
#endif
BOOL APIENTRY DllMain(
HINSTANCE hModule,
DWORD reason,
LPVOID lpReserved )
{
switch( reason ) {
case DLL_PROCESS_ATTACH:
nsToolkit::Startup((HINSTANCE)hModule);
break;
case DLL_THREAD_ATTACH:
break;
case DLL_THREAD_DETACH:
break;
case DLL_PROCESS_DETACH:
nsToolkit::Shutdown();
break;
}
return TRUE;
}
#if defined(MOZ_METRO)
/*
* DelayDllLoadHook - the crt calls here anytime a delay load dll is about to
* load. There are a number of events, we listen for dliNotePreLoadLibrary.
*
* On Win8, we enable Windows Runtime Component Extension support. When enabled
* the compiler bakes auto-generated code into our binary, including a c init-
* ializer which inits the winrt library through a call into the winrt standard
* lib 'vccorlib'. Vccorlib in turn has system dll dependencies which are only
* available on Win8 (currently API-MS-WIN-CORE-WINRT and
* API-MS-WIN-CORE-WINRT-STRING), which prevent xul.dll from loading on os <=
* Win7. To get around this we generate a dummy vccore lib with the three entry
* points the initializer needs and load it in place of the real vccorlib. We
* also have to add vccorlib and the system dlls to the delay load list.
*
* In addition to setting up dummyvccorlib, we also have additional checks for
* for unexpected behavior, specifically:
* - trap attempts to load entry points in dummyvccorlib. This is not expected
* to happen in release code. It can happen during development if winrt apis
* are accessed when running on the desktop, or when winrt objects are
* accidentially placed in the global scope.
* - trap and handle calls to vccorlib's __abi_FailFast in a breakpad compatible
* way. __abi_FailFast is called by exception handling code generated by the
* compiler for delegate events.
*/
static bool IsWin8OrHigher()
{
static int32_t version = 0;
if (version) {
return (version >= 0x602);
}
// Match Win8 or Win8 Server or higher
OSVERSIONINFOEX osInfo;
osInfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
::GetVersionEx((OSVERSIONINFO*)&osInfo);
version =
(osInfo.dwMajorVersion & 0xff) << 8 | (osInfo.dwMinorVersion & 0xff);
return (version >= 0x602);
}
const char* kvccorlib = "vccorlib";
const char* kwinrtprelim = "api-ms-win-core-winrt";
const char* kfailfast = "?__abi_FailFast";
static bool IsWinRTDLLNotPresent(PDelayLoadInfo pdli, const char* aLibToken)
{
return (!IsWin8OrHigher() && pdli->szDll &&
!strnicmp(pdli->szDll, aLibToken, strlen(aLibToken)));
}
static bool IsWinRTDLLPresent(PDelayLoadInfo pdli, const char* aLibToken)
{
return (IsWin8OrHigher() && pdli->szDll &&
!strnicmp(pdli->szDll, aLibToken, strlen(aLibToken)));
}
void __stdcall __abi_MozFailFast()
{
MOZ_CRASH();
}
FARPROC WINAPI DelayDllLoadHook(unsigned dliNotify, PDelayLoadInfo pdli)
{
if (dliNotify == dliNotePreLoadLibrary) {
if (IsWinRTDLLNotPresent(pdli, kvccorlib)) {
return (FARPROC)LoadLibraryA("dummyvccorlib.dll");
}
NS_ASSERTION(!IsWinRTDLLNotPresent(pdli, kwinrtprelim),
"Attempting to load winrt libs in non-metro environment. "
"(Winrt variable type placed in global scope?)");
}
if (dliNotify == dliFailGetProc && IsWinRTDLLNotPresent(pdli, kvccorlib)) {
NS_WARNING("Attempting to access winrt vccorlib entry point in non-metro environment.");
NS_WARNING(pdli->szDll);
NS_WARNING(pdli->dlp.szProcName);
NS_ABORT();
}
if (dliNotify == dliNotePreGetProcAddress &&
IsWinRTDLLPresent(pdli, kvccorlib) &&
pdli->dlp.szProcName &&
!strnicmp(pdli->dlp.szProcName, kfailfast, strlen(kfailfast))) {
return (FARPROC)__abi_MozFailFast;
}
return NULL;
}
ExternC PfnDliHook __pfnDliNotifyHook2 = DelayDllLoadHook;
ExternC PfnDliHook __pfnDliFailureHook2 = DelayDllLoadHook;
#endif // MOZ_METRO
#if defined(__GNUC__)
} // extern "C"
#endif
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