0b0ee0c634
Having a constexpr constructor should guarantee that the static `globals` variable in __libc_shared_globals is initialized statically (as opposed to dynamically), which is important because __libc_shared_globals is called very early (before the linker has relocated itself). With the constructor, though, the fields can safely have in-line default initializers. Bug: none Test: bionic unit tests Change-Id: Icde821557369625734a4d85d7ff55428bad5c247
63 lines
2.1 KiB
C++
63 lines
2.1 KiB
C++
/*
|
|
* Copyright (C) 2018 The Android Open Source Project
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
|
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <android/fdsan.h>
|
|
|
|
#include <errno.h>
|
|
#include <stdatomic.h>
|
|
#include <string.h>
|
|
#include <sys/cdefs.h>
|
|
#include <sys/mman.h>
|
|
#include <sys/resource.h>
|
|
#include <sys/user.h>
|
|
|
|
struct FdEntry {
|
|
_Atomic(uint64_t) close_tag = 0;
|
|
};
|
|
|
|
struct FdTableOverflow {
|
|
size_t len = 0;
|
|
FdEntry entries[0];
|
|
};
|
|
|
|
template <size_t inline_fds>
|
|
struct FdTableImpl {
|
|
constexpr FdTableImpl() {}
|
|
|
|
uint32_t version = 0; // currently 0, and hopefully it'll stay that way.
|
|
_Atomic(android_fdsan_error_level) error_level = ANDROID_FDSAN_ERROR_LEVEL_DISABLED;
|
|
|
|
FdEntry entries[inline_fds];
|
|
_Atomic(FdTableOverflow*) overflow = nullptr;
|
|
|
|
FdEntry* at(size_t idx);
|
|
};
|
|
|
|
using FdTable = FdTableImpl<128>;
|