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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 https://mozilla.org/MPL/2.0/. */
#define MOZ_USE_LAUNCHER_ERROR
#include "freestanding/SafeThreadLocal.h"
#include "mozilla/NativeNt.h"
#include "nsWindowsHelpers.h"
#include <process.h>
#include <stdio.h>
// Need a non-inline function to bypass compiler optimization that the thread
// local storage pointer is cached in a register before accessing a thread-local
// variable.
MOZ_NEVER_INLINE PVOID SwapThreadLocalStoragePointer(PVOID aNewValue) {
auto oldValue = mozilla::nt::RtlGetThreadLocalStoragePointer();
mozilla::nt::RtlSetThreadLocalStoragePointerForTestingOnly(aNewValue);
return oldValue;
}
static mozilla::freestanding::SafeThreadLocal<int*> gTheStorage;
// Need non-inline functions to bypass compiler optimization that the thread
// local storage pointer is cached in a register before accessing a thread-local
// variable. See bug 1803322 for a motivating example.
MOZ_NEVER_INLINE int* getTheStorage() { return gTheStorage.get(); }
MOZ_NEVER_INLINE void setTheStorage(int* p) { gTheStorage.set(p); }
static unsigned int __stdcall TestNonMainThread(void* aArg) {
for (int i = 0; i < 100; ++i) {
setTheStorage(&i);
if (getTheStorage() != &i) {
printf(
"TEST-FAILED | TestSafeThreadLocal | "
"A value is not correctly stored in the thread-local storage.\n");
return 1;
}
}
return 0;
}
extern "C" int wmain(int argc, wchar_t* argv[]) {
int dummy = 0x1234;
auto origHead = SwapThreadLocalStoragePointer(nullptr);
// Setting gTheStorage when TLS is null.
setTheStorage(&dummy);
SwapThreadLocalStoragePointer(origHead);
nsAutoHandle handles[8];
for (auto& handle : handles) {
handle.own(reinterpret_cast<HANDLE>(
::_beginthreadex(nullptr, 0, TestNonMainThread, nullptr, 0, nullptr)));
}
for (int i = 0; i < 100; ++i) {
if (getTheStorage() != &dummy) {
printf(
"TEST-FAILED | TestSafeThreadLocal | "
"A value is not correctly stored in the global scope.\n");
return 1;
}
}
for (auto& handle : handles) {
::WaitForSingleObject(handle, INFINITE);
#if !defined(MOZ_ASAN)
// ASAN builds under Windows 11 can have unexpected thread exit codes.
// See bug 1798796
DWORD exitCode;
if (!::GetExitCodeThread(handle, &exitCode) || exitCode) {
return 1;
}
#endif // !defined(MOZ_ASAN)
}
return 0;
}
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