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/*
* Copyright (C) 2019 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.
*/
#include <stdatomic.h>
#include <platform/bionic/fdtrack.h>
#include <platform/bionic/reserved_signals.h>
#include "private/bionic_fdtrack.h"
#include "private/bionic_tls.h"
#include "private/bionic_globals.h"
_Atomic(android_fdtrack_hook_t) __android_fdtrack_hook;
bool android_fdtrack_get_enabled() {
return !__get_bionic_tls().fdtrack_disabled;
}
bool android_fdtrack_set_enabled(bool new_value) {
auto& tls = __get_bionic_tls();
bool prev = !tls.fdtrack_disabled;
tls.fdtrack_disabled = !new_value;
return prev;
}
bool android_fdtrack_compare_exchange_hook(android_fdtrack_hook_t* expected,
android_fdtrack_hook_t value) {
return atomic_compare_exchange_strong(&__android_fdtrack_hook, expected, value);
}
void __libc_init_fdtrack() {
// Register a no-op signal handler.
signal(BIONIC_SIGNAL_FDTRACK, [](int) {});
}
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