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57 lines
2.4 KiB
C++
57 lines
2.4 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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include <windows.h>
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// Delayed load libraries are loaded when the first symbol is used.
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// The following ensures that we load the delayed loaded libraries from the
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// system directory.
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struct AutoLoadSystemDependencies
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{
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AutoLoadSystemDependencies()
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{
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// Remove the current directory from the search path for dynamically loaded
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// DLLs as a precaution. This call has no effect for delay load DLLs.
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SetDllDirectory(L"");
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// The order that these are loaded matter, for example if we load something
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// that tries to load profapi.dll first, then profapi.dll would be loaded
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// wrongly from the current directory.
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static LPCWSTR delayDLLs[] = { L"profapi.dll", L"wsock32.dll",
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L"crypt32.dll", L"cryptsp.dll",
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L"cryptbase.dll", L"msasn1.dll",
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L"userenv.dll", L"secur32.dll",
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L"ws2_32.dll", L"ws2help.dll",
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L"apphelp.dll", L"bcryptprimitives.dll" };
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WCHAR systemDirectory[MAX_PATH + 1] = { L'\0' };
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// If GetSystemDirectory fails we accept that we'll load the DLLs from the
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// normal search path.
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GetSystemDirectory(systemDirectory, MAX_PATH + 1);
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size_t systemDirLen = wcslen(systemDirectory);
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// Make the system directory path terminate with a slash
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if (systemDirectory[systemDirLen - 1] != L'\\' && systemDirLen) {
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systemDirectory[systemDirLen] = L'\\';
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++systemDirLen;
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// No need to re-NULL terminate
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}
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// For each known DLL ensure it is loaded from the system32 directory
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for (size_t i = 0; i < sizeof(delayDLLs) / sizeof(delayDLLs[0]); ++i) {
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size_t fileLen = wcslen(delayDLLs[i]);
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wcsncpy(systemDirectory + systemDirLen, delayDLLs[i],
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MAX_PATH - systemDirLen);
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if (systemDirLen + fileLen <= MAX_PATH) {
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systemDirectory[systemDirLen + fileLen] = L'\0';
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} else {
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systemDirectory[MAX_PATH] = L'\0';
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}
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LPCWSTR fullModulePath = systemDirectory; // just for code readability
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LoadLibraryW(fullModulePath);
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}
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}
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} loadDLLs;
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