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d1d4388201
It hasn't been helpful enough to be justify the maintenance burden. What actually does help is mprotect(), kprintf(), --ftrace and --strace which can always be counted upon to work correctly. We aren't losing much with this change. Support for ASAN on AARCH64 was never implemented. Applying ASAN to the core libc runtimes was disabled many months ago. If there is some way to have an ASAN runtime for user programs that is less invasive we can potentially consider reintroducing support. But now is premature.
59 lines
3.3 KiB
C
59 lines
3.3 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/syscall-nt.internal.h"
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#include "libc/calls/syscall-sysv.internal.h"
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#include "libc/dce.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/sysv/consts/o.h"
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#include "libc/sysv/errfuns.h"
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/**
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* Creates file-less file descriptors for interprocess communication.
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*
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* This function offers atomic operation on all supported platforms
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* except for XNU and RHEL5 where it's polyfilled.
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*
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* @params flags may contain `O_CLOEXEC`, `O_NONBLOCK`, or the non-POSIX
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* packet mode flag `O_DIRECT`, which is `EINVAL` on MacOS / OpenBSD
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* @raise EINVAL if flags has invalid or unsupported bits
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* @raise EFAULT if `pipefd` doesn't point to valid memory
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* @raise EMFILE if process `RLIMIT_NOFILE` has been reached
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* @raise ENFILE if system-wide file limit has been reached
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* @param pipefd is used to return (reader, writer) file descriptors
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* @param flags can have O_CLOEXEC or O_DIRECT or O_NONBLOCK
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* @return 0 on success, or -1 w/ errno and pipefd isn't modified
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*/
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int pipe2(int pipefd[hasatleast 2], int flags) {
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int rc;
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if (flags & ~(O_CLOEXEC | O_NONBLOCK | (O_DIRECT != -1u ? O_DIRECT : 0))) {
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return einval();
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} else if (!pipefd) {
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rc = efault();
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} else if (!IsWindows()) {
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rc = sys_pipe2(pipefd, flags);
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} else {
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rc = sys_pipe_nt(pipefd, flags);
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}
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if (!rc) {
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STRACE("pipe2([{%d, %d}], %#o) → %d% m", pipefd[0], pipefd[1], flags, rc);
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} else {
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STRACE("pipe2(%p, %#o) → %d% m", pipefd, flags, rc);
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}
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return rc;
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}
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