38e960b7aa
It seems clearer to include FD_SETSIZE in the message. set_size is sizeof(fd_set) so there's an extra mental hoop to jump if that's in the error message. Test: make Change-Id: I5cdb62465b658ac0eaeccbfb826d135820cf613a
81 lines
3 KiB
C
81 lines
3 KiB
C
/*
|
|
* Copyright (C) 2016 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 <poll.h> // For struct pollfd.
|
|
#include <stdarg.h>
|
|
#include <stdlib.h>
|
|
#include <sys/select.h> // For struct fd_set.
|
|
|
|
#include <async_safe/log.h>
|
|
|
|
static inline __noreturn void __fortify_fatal(const char* fmt, ...) {
|
|
va_list args;
|
|
va_start(args, fmt);
|
|
async_safe_fatal_va_list("FORTIFY", fmt, args);
|
|
va_end(args);
|
|
abort();
|
|
}
|
|
|
|
//
|
|
// Common helpers.
|
|
//
|
|
|
|
static inline void __check_fd_set(const char* fn, int fd, size_t set_size) {
|
|
if (__predict_false(fd < 0)) {
|
|
__fortify_fatal("%s: file descriptor %d < 0", fn, fd);
|
|
}
|
|
if (__predict_false(fd >= FD_SETSIZE)) {
|
|
__fortify_fatal("%s: file descriptor %d >= FD_SETSIZE %zu", fn, fd, FD_SETSIZE);
|
|
}
|
|
if (__predict_false(set_size < sizeof(fd_set))) {
|
|
__fortify_fatal("%s: set size %zu is too small to be an fd_set", fn, set_size);
|
|
}
|
|
}
|
|
|
|
static inline void __check_pollfd_array(const char* fn, size_t fds_size, nfds_t fd_count) {
|
|
size_t pollfd_array_length = fds_size / sizeof(pollfd);
|
|
if (__predict_false(pollfd_array_length < fd_count)) {
|
|
__fortify_fatal("%s: %zu-element pollfd array too small for %u fds",
|
|
fn, pollfd_array_length, fd_count);
|
|
}
|
|
}
|
|
|
|
static inline void __check_count(const char* fn, const char* identifier, size_t value) {
|
|
if (__predict_false(value > SSIZE_MAX)) {
|
|
__fortify_fatal("%s: %s %zu > SSIZE_MAX", fn, identifier, value);
|
|
}
|
|
}
|
|
|
|
static inline void __check_buffer_access(const char* fn, const char* action,
|
|
size_t claim, size_t actual) {
|
|
if (__predict_false(claim > actual)) {
|
|
__fortify_fatal("%s: prevented %zu-byte %s %zu-byte buffer", fn, claim, action, actual);
|
|
}
|
|
}
|