/* -*- 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 "nsXULAppAPI.h" #include "mozilla/AppData.h" #include "application.ini.h" #include "nsXPCOMGlue.h" #if defined(XP_WIN) #include <windows.h> #include <stdlib.h> #elif defined(XP_UNIX) #include <sys/resource.h> #include <unistd.h> #endif #include <stdio.h> #include <stdarg.h> #include <time.h> #include "nsCOMPtr.h" #include "nsIFile.h" #include "nsStringGlue.h" #ifdef XP_WIN #ifdef MOZ_ASAN // ASAN requires firefox.exe to be built with -MD, and it's OK if we don't // support Windows XP SP2 in ASAN builds. #define XRE_DONT_SUPPORT_XPSP2 #endif #define XRE_WANT_ENVIRON #define strcasecmp _stricmp #ifdef MOZ_SANDBOX #include "mozilla/sandboxing/SandboxInitialization.h" #endif #endif #include "BinaryPath.h" #include "nsXPCOMPrivate.h" // for MAXPATHLEN and XPCOM_DLL #include "mozilla/Sprintf.h" #include "mozilla/Telemetry.h" #include "mozilla/WindowsDllBlocklist.h" #if !defined(MOZ_WIDGET_COCOA) && !defined(MOZ_WIDGET_ANDROID) \ && !(defined(XP_LINUX) && defined(MOZ_SANDBOX)) #define MOZ_BROWSER_CAN_BE_CONTENTPROC #include "../../ipc/contentproc/plugin-container.cpp" #endif using namespace mozilla; #ifdef XP_MACOSX #define kOSXResourcesFolder "Resources" #endif #define kDesktopFolder "browser" static void Output(const char *fmt, ... ) { va_list ap; va_start(ap, fmt); #ifndef XP_WIN vfprintf(stderr, fmt, ap); #else char msg[2048]; vsnprintf_s(msg, _countof(msg), _TRUNCATE, fmt, ap); wchar_t wide_msg[2048]; MultiByteToWideChar(CP_UTF8, 0, msg, -1, wide_msg, _countof(wide_msg)); #if MOZ_WINCONSOLE fwprintf_s(stderr, wide_msg); #else // Linking user32 at load-time interferes with the DLL blocklist (bug 932100). // This is a rare codepath, so we can load user32 at run-time instead. HMODULE user32 = LoadLibraryW(L"user32.dll"); if (user32) { decltype(MessageBoxW)* messageBoxW = (decltype(MessageBoxW)*) GetProcAddress(user32, "MessageBoxW"); if (messageBoxW) { messageBoxW(nullptr, wide_msg, L"Firefox", MB_OK | MB_ICONERROR | MB_SETFOREGROUND); } FreeLibrary(user32); } #endif #endif va_end(ap); } /** * Return true if |arg| matches the given argument name. */ static bool IsArg(const char* arg, const char* s) { if (*arg == '-') { if (*++arg == '-') ++arg; return !strcasecmp(arg, s); } #if defined(XP_WIN) if (*arg == '/') return !strcasecmp(++arg, s); #endif return false; } XRE_GetFileFromPathType XRE_GetFileFromPath; XRE_CreateAppDataType XRE_CreateAppData; XRE_FreeAppDataType XRE_FreeAppData; XRE_TelemetryAccumulateType XRE_TelemetryAccumulate; XRE_StartupTimelineRecordType XRE_StartupTimelineRecord; XRE_mainType XRE_main; XRE_StopLateWriteChecksType XRE_StopLateWriteChecks; XRE_XPCShellMainType XRE_XPCShellMain; XRE_GetProcessTypeType XRE_GetProcessType; XRE_SetProcessTypeType XRE_SetProcessType; XRE_InitChildProcessType XRE_InitChildProcess; XRE_EnableSameExecutableForContentProcType XRE_EnableSameExecutableForContentProc; #ifdef LIBFUZZER XRE_LibFuzzerSetMainType XRE_LibFuzzerSetMain; XRE_LibFuzzerGetFuncsType XRE_LibFuzzerGetFuncs; #endif static const nsDynamicFunctionLoad kXULFuncs[] = { { "XRE_GetFileFromPath", (NSFuncPtr*) &XRE_GetFileFromPath }, { "XRE_CreateAppData", (NSFuncPtr*) &XRE_CreateAppData }, { "XRE_FreeAppData", (NSFuncPtr*) &XRE_FreeAppData }, { "XRE_TelemetryAccumulate", (NSFuncPtr*) &XRE_TelemetryAccumulate }, { "XRE_StartupTimelineRecord", (NSFuncPtr*) &XRE_StartupTimelineRecord }, { "XRE_main", (NSFuncPtr*) &XRE_main }, { "XRE_StopLateWriteChecks", (NSFuncPtr*) &XRE_StopLateWriteChecks }, { "XRE_XPCShellMain", (NSFuncPtr*) &XRE_XPCShellMain }, { "XRE_GetProcessType", (NSFuncPtr*) &XRE_GetProcessType }, { "XRE_SetProcessType", (NSFuncPtr*) &XRE_SetProcessType }, { "XRE_InitChildProcess", (NSFuncPtr*) &XRE_InitChildProcess }, { "XRE_EnableSameExecutableForContentProc", (NSFuncPtr*) &XRE_EnableSameExecutableForContentProc }, #ifdef LIBFUZZER { "XRE_LibFuzzerSetMain", (NSFuncPtr*) &XRE_LibFuzzerSetMain }, { "XRE_LibFuzzerGetFuncs", (NSFuncPtr*) &XRE_LibFuzzerGetFuncs }, #endif { nullptr, nullptr } }; #ifdef LIBFUZZER int libfuzzer_main(int argc, char **argv); /* This wrapper is used by the libFuzzer main to call into libxul */ void libFuzzerGetFuncs(const char* moduleName, LibFuzzerInitFunc* initFunc, LibFuzzerTestingFunc* testingFunc) { return XRE_LibFuzzerGetFuncs(moduleName, initFunc, testingFunc); } #endif static int do_main(int argc, char* argv[], char* envp[], nsIFile *xreDirectory) { nsCOMPtr<nsIFile> appini; nsresult rv; uint32_t mainFlags = 0; // Allow firefox.exe to launch XULRunner apps via -app <application.ini> // Note that -app must be the *first* argument. const char *appDataFile = getenv("XUL_APP_FILE"); if (appDataFile && *appDataFile) { rv = XRE_GetFileFromPath(appDataFile, getter_AddRefs(appini)); if (NS_FAILED(rv)) { Output("Invalid path found: '%s'", appDataFile); return 255; } } else if (argc > 1 && IsArg(argv[1], "app")) { if (argc == 2) { Output("Incorrect number of arguments passed to -app"); return 255; } rv = XRE_GetFileFromPath(argv[2], getter_AddRefs(appini)); if (NS_FAILED(rv)) { Output("application.ini path not recognized: '%s'", argv[2]); return 255; } char appEnv[MAXPATHLEN]; SprintfLiteral(appEnv, "XUL_APP_FILE=%s", argv[2]); if (putenv(strdup(appEnv))) { Output("Couldn't set %s.\n", appEnv); return 255; } argv[2] = argv[0]; argv += 2; argc -= 2; } else if (argc > 1 && IsArg(argv[1], "xpcshell")) { for (int i = 1; i < argc; i++) { argv[i] = argv[i + 1]; } XREShellData shellData; #if defined(XP_WIN) && defined(MOZ_SANDBOX) shellData.sandboxBrokerServices = sandboxing::GetInitializedBrokerServices(); #endif return XRE_XPCShellMain(--argc, argv, envp, &shellData); } if (appini) { nsXREAppData *appData; rv = XRE_CreateAppData(appini, &appData); if (NS_FAILED(rv)) { Output("Couldn't read application.ini"); return 255; } #if defined(HAS_DLL_BLOCKLIST) // The dll blocklist operates in the exe vs. xullib. Pass a flag to // xullib so automated tests can check the result once the browser // is up and running. appData->flags |= DllBlocklist_CheckStatus() ? NS_XRE_DLL_BLOCKLIST_ENABLED : 0; #endif // xreDirectory already has a refcount from NS_NewLocalFile appData->xreDirectory = xreDirectory; int result = XRE_main(argc, argv, appData, mainFlags); XRE_FreeAppData(appData); return result; } ScopedAppData appData(&sAppData); nsCOMPtr<nsIFile> exeFile; rv = mozilla::BinaryPath::GetFile(argv[0], getter_AddRefs(exeFile)); if (NS_FAILED(rv)) { Output("Couldn't find the application directory.\n"); return 255; } nsCOMPtr<nsIFile> greDir; exeFile->GetParent(getter_AddRefs(greDir)); #ifdef XP_MACOSX greDir->SetNativeLeafName(NS_LITERAL_CSTRING(kOSXResourcesFolder)); #endif nsCOMPtr<nsIFile> appSubdir; greDir->Clone(getter_AddRefs(appSubdir)); appSubdir->Append(NS_LITERAL_STRING(kDesktopFolder)); SetStrongPtr(appData.directory, static_cast<nsIFile*>(appSubdir.get())); // xreDirectory already has a refcount from NS_NewLocalFile appData.xreDirectory = xreDirectory; #if defined(HAS_DLL_BLOCKLIST) appData.flags |= DllBlocklist_CheckStatus() ? NS_XRE_DLL_BLOCKLIST_ENABLED : 0; #endif #if defined(XP_WIN) && defined(MOZ_SANDBOX) sandbox::BrokerServices* brokerServices = sandboxing::GetInitializedBrokerServices(); #if defined(MOZ_CONTENT_SANDBOX) if (!brokerServices) { Output("Couldn't initialize the broker services.\n"); return 255; } #endif appData.sandboxBrokerServices = brokerServices; #endif #ifdef LIBFUZZER if (getenv("LIBFUZZER")) XRE_LibFuzzerSetMain(argc, argv, libfuzzer_main); #endif return XRE_main(argc, argv, &appData, mainFlags); } static bool FileExists(const char *path) { #ifdef XP_WIN wchar_t wideDir[MAX_PATH]; MultiByteToWideChar(CP_UTF8, 0, path, -1, wideDir, MAX_PATH); DWORD fileAttrs = GetFileAttributesW(wideDir); return fileAttrs != INVALID_FILE_ATTRIBUTES; #else return access(path, R_OK) == 0; #endif } static nsresult InitXPCOMGlue(const char *argv0, nsIFile **xreDirectory) { char exePath[MAXPATHLEN]; nsresult rv = mozilla::BinaryPath::Get(argv0, exePath); if (NS_FAILED(rv)) { Output("Couldn't find the application directory.\n"); return rv; } char *lastSlash = strrchr(exePath, XPCOM_FILE_PATH_SEPARATOR[0]); if (!lastSlash || (size_t(lastSlash - exePath) > MAXPATHLEN - sizeof(XPCOM_DLL) - 1)) return NS_ERROR_FAILURE; strcpy(lastSlash + 1, XPCOM_DLL); if (!FileExists(exePath)) { Output("Could not find the Mozilla runtime.\n"); return NS_ERROR_FAILURE; } // We do this because of data in bug 771745 XPCOMGlueEnablePreload(); rv = XPCOMGlueStartup(exePath); if (NS_FAILED(rv)) { Output("Couldn't load XPCOM.\n"); return rv; } rv = XPCOMGlueLoadXULFunctions(kXULFuncs); if (NS_FAILED(rv)) { Output("Couldn't load XRE functions.\n"); return rv; } // This will set this thread as the main thread. NS_LogInit(); if (xreDirectory) { // chop XPCOM_DLL off exePath *lastSlash = '\0'; #ifdef XP_MACOSX lastSlash = strrchr(exePath, XPCOM_FILE_PATH_SEPARATOR[0]); strcpy(lastSlash + 1, kOSXResourcesFolder); #endif #ifdef XP_WIN rv = NS_NewLocalFile(NS_ConvertUTF8toUTF16(exePath), false, xreDirectory); #else rv = NS_NewNativeLocalFile(nsDependentCString(exePath), false, xreDirectory); #endif } return rv; } int main(int argc, char* argv[], char* envp[]) { mozilla::TimeStamp start = mozilla::TimeStamp::Now(); #ifdef HAS_DLL_BLOCKLIST DllBlocklist_Initialize(); #ifdef DEBUG // In order to be effective against AppInit DLLs, the blocklist must be // initialized before user32.dll is loaded into the process (bug 932100). if (GetModuleHandleA("user32.dll")) { fprintf(stderr, "DLL blocklist was unable to intercept AppInit DLLs.\n"); } #endif #endif #ifdef MOZ_BROWSER_CAN_BE_CONTENTPROC // We are launching as a content process, delegate to the appropriate // main if (argc > 1 && IsArg(argv[1], "contentproc")) { #if defined(XP_WIN) && defined(MOZ_SANDBOX) // We need to initialize the sandbox TargetServices before InitXPCOMGlue // because we might need the sandbox broker to give access to some files. if (IsSandboxedProcess() && !sandboxing::GetInitializedTargetServices()) { Output("Failed to initialize the sandbox target services."); return 255; } #endif nsresult rv = InitXPCOMGlue(argv[0], nullptr); if (NS_FAILED(rv)) { return 255; } int result = content_process_main(argc, argv); // InitXPCOMGlue calls NS_LogInit, so we need to balance it here. NS_LogTerm(); return result; } #endif nsIFile *xreDirectory; nsresult rv = InitXPCOMGlue(argv[0], &xreDirectory); if (NS_FAILED(rv)) { return 255; } XRE_StartupTimelineRecord(mozilla::StartupTimeline::START, start); #ifdef MOZ_BROWSER_CAN_BE_CONTENTPROC XRE_EnableSameExecutableForContentProc(); #endif int result = do_main(argc, argv, envp, xreDirectory); NS_LogTerm(); #ifdef XP_MACOSX // Allow writes again. While we would like to catch writes from static // destructors to allow early exits to use _exit, we know that there is // at least one such write that we don't control (see bug 826029). For // now we enable writes again and early exits will have to use exit instead // of _exit. XRE_StopLateWriteChecks(); #endif return result; }