| /* |
| * 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. |
| */ |
| |
| #pragma once |
| |
| #include <stdatomic.h> |
| #include <sys/cdefs.h> |
| |
| #include "platform/bionic/fdtrack.h" |
| |
| #include "bionic/pthread_internal.h" |
| #include "private/ErrnoRestorer.h" |
| #include "private/bionic_tls.h" |
| |
| extern "C" _Atomic(android_fdtrack_hook_t) __android_fdtrack_hook; |
| extern "C" bool __android_fdtrack_globally_disabled; |
| |
| // Macro to record file descriptor creation. |
| // e.g.: |
| // int socket(int domain, int type, int protocol) { |
| // return FDTRACK_CREATE_NAME("socket", __socket(domain, type, protocol)); |
| // } |
| #define FDTRACK_CREATE_NAME(name, fd_value) \ |
| ({ \ |
| int __fd = (fd_value); \ |
| if (__fd != -1 && __predict_false(__android_fdtrack_hook) && \ |
| !__predict_false(__get_thread()->is_vforked())) { \ |
| bionic_tls& tls = __get_bionic_tls(); \ |
| /* fdtrack_disabled is only true during reentrant calls. */ \ |
| if (!__predict_false(tls.fdtrack_disabled) && \ |
| !__predict_false(__android_fdtrack_globally_disabled)) { \ |
| ErrnoRestorer r; \ |
| tls.fdtrack_disabled = true; \ |
| android_fdtrack_event event; \ |
| event.fd = __fd; \ |
| event.type = ANDROID_FDTRACK_EVENT_TYPE_CREATE; \ |
| event.data.create.function_name = name; \ |
| atomic_load (&__android_fdtrack_hook)(&event); \ |
| tls.fdtrack_disabled = false; \ |
| } \ |
| } \ |
| __fd; \ |
| }) |
| |
| // Macro to record file descriptor creation, with the current function's name. |
| // e.g.: |
| // int socket(int domain, int type, int protocol) { |
| // return FDTRACK_CREATE_NAME(__socket(domain, type, protocol)); |
| // } |
| #define FDTRACK_CREATE(fd_value) FDTRACK_CREATE_NAME(__func__, (fd_value)) |
| |
| // Macro to record file descriptor closure. |
| // Note that this does not actually close the file descriptor. |
| #define FDTRACK_CLOSE(fd_value) \ |
| ({ \ |
| int __fd = (fd_value); \ |
| if (__fd != -1 && __predict_false(__android_fdtrack_hook) && \ |
| !__predict_false(__get_thread()->is_vforked())) { \ |
| bionic_tls& tls = __get_bionic_tls(); \ |
| if (!__predict_false(tls.fdtrack_disabled) && \ |
| !__predict_false(__android_fdtrack_globally_disabled)) { \ |
| int saved_errno = errno; \ |
| tls.fdtrack_disabled = true; \ |
| android_fdtrack_event event; \ |
| event.fd = __fd; \ |
| event.type = ANDROID_FDTRACK_EVENT_TYPE_CLOSE; \ |
| atomic_load (&__android_fdtrack_hook)(&event); \ |
| tls.fdtrack_disabled = false; \ |
| errno = saved_errno; \ |
| } \ |
| } \ |
| __fd; \ |
| }) |