From ed5640d8b587fbcfed7dd7967f3de04b37a76f26 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 11:06:44 +0200 Subject: Adding upstream version 4:7.4.7. Signed-off-by: Daniel Baumann --- onlineupdate/source/update/updater/loaddlls.cxx | 119 ++++++++++++++++++++++++ 1 file changed, 119 insertions(+) create mode 100644 onlineupdate/source/update/updater/loaddlls.cxx (limited to 'onlineupdate/source/update/updater/loaddlls.cxx') diff --git a/onlineupdate/source/update/updater/loaddlls.cxx b/onlineupdate/source/update/updater/loaddlls.cxx new file mode 100644 index 000000000..6a0c8a61e --- /dev/null +++ b/onlineupdate/source/update/updater/loaddlls.cxx @@ -0,0 +1,119 @@ +/* -*- 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/. */ + + +#ifdef _WIN32 +#ifndef UNICODE +#define UNICODE +#endif +#include + +// Delayed load libraries are loaded when the first symbol is used. +// The following ensures that we load the delayed loaded libraries from the +// system directory. +struct AutoLoadSystemDependencies +{ + AutoLoadSystemDependencies() + { + // Remove the current directory from the search path for dynamically loaded + // DLLs as a precaution. This call has no effect for delay load DLLs. + SetDllDirectory(L""); + + HMODULE module = ::GetModuleHandleW(L"kernel32.dll"); + if (module) + { + // SetDefaultDllDirectories is always available on Windows 8 and above. It + // is also available on Windows Vista, Windows Server 2008, and + // Windows 7 when MS KB2533623 has been applied. + decltype(SetDefaultDllDirectories)* setDefaultDllDirectories = + (decltype(SetDefaultDllDirectories)*) GetProcAddress(module, "SetDefaultDllDirectories"); + if (setDefaultDllDirectories) + { + setDefaultDllDirectories(LOAD_LIBRARY_SEARCH_SYSTEM32); + return; + } + } + + // TODO: moggi: do we need all that code? + // When SetDefaultDllDirectories is not available, fallback to preloading + // dlls. The order that these are loaded does not matter since they are + // loaded using the LOAD_WITH_ALTERED_SEARCH_PATH flag. +#ifdef HAVE_64BIT_BUILD + // DLLs for Firefox x64 on Windows 7 (x64). + // Note: dwmapi.dll is preloaded since a crash will try to load it from the + // application's directory. + static LPCWSTR delayDLLs[] = { L"apphelp.dll", + L"cryptbase.dll", + L"cryptsp.dll", + L"dwmapi.dll", + L"mpr.dll", + L"ntmarta.dll", + L"profapi.dll", + L"propsys.dll", + L"sspicli.dll", + L"wsock32.dll" + }; + +#else + // DLLs for Firefox x86 on Windows XP through Windows 7 (x86 and x64). + // Note: dwmapi.dll is preloaded since a crash will try to load it from the + // application's directory. + static LPCWSTR delayDLLs[] = { L"apphelp.dll", + L"crypt32.dll", + L"cryptbase.dll", + L"cryptsp.dll", + L"dwmapi.dll", + L"mpr.dll", + L"msasn1.dll", + L"ntmarta.dll", + L"profapi.dll", + L"propsys.dll", + L"psapi.dll", + L"secur32.dll", + L"sspicli.dll", + L"userenv.dll", + L"uxtheme.dll", + L"ws2_32.dll", + L"ws2help.dll", + L"wsock32.dll" + }; +#endif + + WCHAR systemDirectory[MAX_PATH + 1] = { L'\0' }; + // If GetSystemDirectory fails we accept that we'll load the DLLs from the + // normal search path. + GetSystemDirectoryW(systemDirectory, MAX_PATH + 1); + size_t systemDirLen = wcslen(systemDirectory); + + // Make the system directory path terminate with a slash + if (systemDirectory[systemDirLen - 1] != L'\\' && systemDirLen) + { + systemDirectory[systemDirLen] = L'\\'; + ++systemDirLen; + // No need to re-null terminate + } + + // For each known DLL ensure it is loaded from the system32 directory + for (size_t i = 0; i < sizeof(delayDLLs) / sizeof(delayDLLs[0]); ++i) + { + size_t fileLen = wcslen(delayDLLs[i]); + wcsncpy(systemDirectory + systemDirLen, delayDLLs[i], + MAX_PATH - systemDirLen); + if (systemDirLen + fileLen <= MAX_PATH) + { + systemDirectory[systemDirLen + fileLen] = L'\0'; + } + else + { + systemDirectory[MAX_PATH] = L'\0'; + } + LPCWSTR fullModulePath = systemDirectory; // just for code readability + // LOAD_WITH_ALTERED_SEARCH_PATH makes a dll look in its own directory for + // dependencies and is only available on Win 7 and below. + LoadLibraryExW(fullModulePath, nullptr, LOAD_WITH_ALTERED_SEARCH_PATH); + } + } +} loadDLLs; +#endif -- cgit v1.2.3