b83d6747fa
Our FORTIFY _chk functions' implementations were very repetitive and verbose but not very helpful. We'd also screwed up and put the SSIZE_MAX checks where they would never fire unless you actually had a buffer as large as half your address space, which probably doesn't happen very often. Factor out the duplication and take the opportunity to actually show details like how big the overrun buffer was, or by how much it was overrun. Also remove the obsolete FORTIFY event logging. Also remove the unused __libc_fatal_no_abort. This change doesn't improve the diagnostics from the optimized assembler implementations. Change-Id: I176a90701395404d50975b547a00bd2c654e1252
93 lines
2.9 KiB
C++
93 lines
2.9 KiB
C++
/*
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* Copyright (C) 2008 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <fcntl.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "private/libc_logging.h"
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extern "C" int __openat(int, const char*, int, int);
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static inline int force_O_LARGEFILE(int flags) {
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#if __LP64__
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return flags; // No need, and aarch64's strace gets confused.
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#else
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return flags | O_LARGEFILE;
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#endif
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}
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int creat(const char* pathname, mode_t mode) {
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return open(pathname, O_CREAT | O_TRUNC | O_WRONLY, mode);
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}
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__strong_alias(creat64, creat);
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int open(const char* pathname, int flags, ...) {
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mode_t mode = 0;
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if ((flags & O_CREAT) != 0) {
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va_list args;
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va_start(args, flags);
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mode = static_cast<mode_t>(va_arg(args, int));
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va_end(args);
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}
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return __openat(AT_FDCWD, pathname, force_O_LARGEFILE(flags), mode);
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}
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__strong_alias(open64, open);
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int __open_2(const char* pathname, int flags) {
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if (__predict_false((flags & O_CREAT) != 0)) {
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__fortify_fatal("open(O_CREAT): called without specifying a mode");
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}
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return __openat(AT_FDCWD, pathname, force_O_LARGEFILE(flags), 0);
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}
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int openat(int fd, const char *pathname, int flags, ...) {
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mode_t mode = 0;
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if ((flags & O_CREAT) != 0) {
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va_list args;
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va_start(args, flags);
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mode = static_cast<mode_t>(va_arg(args, int));
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va_end(args);
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}
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return __openat(fd, pathname, force_O_LARGEFILE(flags), mode);
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}
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__strong_alias(openat64, openat);
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int __openat_2(int fd, const char* pathname, int flags) {
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if ((flags & O_CREAT) != 0) {
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__fortify_fatal("openat(O_CREAT): called without specifying a mode");
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}
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return __openat(fd, pathname, force_O_LARGEFILE(flags), 0);
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}
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