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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/chrome_elf/chrome_elf_main.h"
#include <assert.h>
#include <windows.h>
#include "chrome/chrome_elf/chrome_elf_security.h"
#include "chrome/chrome_elf/crash/crash_helper.h"
#include "chrome/chrome_elf/third_party_dlls/beacon.h"
#include "chrome/chrome_elf/third_party_dlls/main.h"
#include "chrome/install_static/install_details.h"
#include "chrome/install_static/install_util.h"
#include "chrome/install_static/product_install_details.h"
#include "chrome/install_static/user_data_dir.h"
// This function is exported from the DLL so that it can be called by WinMain
// after startup has completed in the browser process. For non-browser processes
// it will be called inside the DLL loader lock so it should do as little as
// possible to prevent deadlocks.
void SignalInitializeCrashReporting() {
if (!elf_crash::InitializeCrashReporting()) {
#ifdef _DEBUG
assert(false);
#endif // _DEBUG
}
}
void SignalChromeElf() {
third_party_dlls::ResetBeacon();
}
bool GetUserDataDirectoryThunk(wchar_t* user_data_dir,
size_t user_data_dir_length,
wchar_t* invalid_user_data_dir,
size_t invalid_user_data_dir_length) {
std::wstring user_data_dir_str, invalid_user_data_dir_str;
bool ret = install_static::GetUserDataDirectory(&user_data_dir_str,
&invalid_user_data_dir_str);
assert(ret);
install_static::IgnoreUnused(ret);
wcsncpy_s(user_data_dir, user_data_dir_length, user_data_dir_str.c_str(),
_TRUNCATE);
wcsncpy_s(invalid_user_data_dir, invalid_user_data_dir_length,
invalid_user_data_dir_str.c_str(), _TRUNCATE);
return true;
}
// DllMain
// -------
// Warning: The OS loader lock is held during DllMain. Be careful.
// https://msdn.microsoft.com/en-us/library/windows/desktop/dn633971.aspx
//
// - Note: Do not use install_static::GetUserDataDir from inside DllMain.
// This can result in path expansion that triggers secondary DLL loads,
// that will blow up with the loader lock held.
// https://bugs.chromium.org/p/chromium/issues/detail?id=748949#c18
BOOL APIENTRY DllMain(HMODULE module, DWORD reason, LPVOID reserved) {
if (reason == DLL_PROCESS_ATTACH) {
install_static::InitializeProductDetailsForPrimaryModule();
install_static::InitializeProcessType();
if (install_static::IsBrowserProcess()) {
__try {
// Disable third party extension points.
elf_security::EarlyBrowserSecurity();
// Initialize the blocking of third-party DLLs if the initialization of
// the safety beacon succeeds.
if (third_party_dlls::LeaveSetupBeacon())
third_party_dlls::Init();
} __except (elf_crash::GenerateCrashDump(GetExceptionInformation())) {
}
} else if (!install_static::IsCrashpadHandlerProcess()) {
SignalInitializeCrashReporting();
// CRT on initialization installs an exception filter which calls
// TerminateProcess. We need to hook CRT's attempt to set an exception.
elf_crash::DisableSetUnhandledExceptionFilter();
}
} else if (reason == DLL_PROCESS_DETACH) {
elf_crash::ShutdownCrashReporting();
}
return TRUE;
}
void DumpProcessWithoutCrash() {
elf_crash::DumpWithoutCrashing();
}
void SetMetricsClientId(const char* client_id) {
elf_crash::SetMetricsClientIdImpl(client_id);
}
bool IsBrowserProcess() {
return install_static::IsBrowserProcess();
}
bool IsExtensionPointDisableSet() {
return elf_security::IsExtensionPointDisableSet();
}
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