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