| /* |
| * 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_globally_disabled=false; |
| |
| void android_fdtrack_set_globally_enabled(bool new_value){ |
| __android_fdtrack_globally_disabled=!new_value; |
| } |
| |
| bool android_fdtrack_get_enabled(){ |
| return!__get_bionic_tls().fdtrack_disabled&&!__android_fdtrack_globally_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){}); |
| } |
