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https://github.com/jart/cosmopolitan.git
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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.
74 lines
3.5 KiB
C
74 lines
3.5 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/cp.internal.h"
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#include "libc/calls/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/sock/internal.h"
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#include "libc/sock/sock.h"
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#include "libc/sock/struct/sockaddr.h"
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#include "libc/sock/struct/sockaddr.internal.h"
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#include "libc/sock/syscall_fd.internal.h"
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#include "libc/sysv/errfuns.h"
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/**
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* Creates client socket file descriptor for incoming connection.
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*
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* @param fd is the server socket file descriptor
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* @param opt_out_addr will receive the remote address
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* @param opt_inout_addrsize provides and receives out_addr's byte length
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* @param flags can have SOCK_{CLOEXEC,NONBLOCK}, which may apply to
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* both the newly created socket and the server one
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* @return client fd which needs close(), or -1 w/ errno
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* @cancelationpoint
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* @asyncsignalsafe
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* @restartable (unless SO_RCVTIMEO)
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*/
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int accept4(int fd, struct sockaddr *opt_out_addr, uint32_t *opt_inout_addrsize,
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int flags) {
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int rc;
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struct sockaddr_storage ss = {0};
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BEGIN_CANCELATION_POINT;
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if (fd < g_fds.n && g_fds.p[fd].kind == kFdZip) {
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rc = enotsock();
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} else if (!IsWindows()) {
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rc = sys_accept4(fd, &ss, flags);
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} else if (!__isfdopen(fd)) {
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rc = ebadf();
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} else if (__isfdkind(fd, kFdSocket)) {
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rc = sys_accept_nt(g_fds.p + fd, &ss, flags);
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} else {
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rc = enotsock();
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}
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if (rc != -1) {
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if (IsBsd()) {
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__convert_bsd_to_sockaddr(&ss);
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}
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__write_sockaddr(&ss, opt_out_addr, opt_inout_addrsize);
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}
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END_CANCELATION_POINT;
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STRACE("accept4(%d, [%s]) -> %d% lm", fd,
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DescribeSockaddr(opt_out_addr,
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opt_inout_addrsize ? *opt_inout_addrsize : 0),
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rc);
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return rc;
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}
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