2020-06-15 14:18:57 +00:00
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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2023-12-08 03:11:56 +00:00
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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2020-06-15 14:18:57 +00:00
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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2020-12-28 01:18:44 +00:00
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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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2020-06-15 14:18:57 +00:00
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│ │
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2020-12-28 01:18:44 +00:00
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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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2020-06-15 14:18:57 +00:00
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/assert.h"
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2022-04-24 16:59:22 +00:00
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#include "libc/calls/struct/timeval.h"
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2022-04-25 15:30:14 +00:00
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#include "libc/nt/struct/linger.h"
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2023-07-30 11:26:34 +00:00
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#include "libc/nt/thunk/msabi.h"
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2020-06-15 14:18:57 +00:00
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#include "libc/nt/winsock.h"
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#include "libc/sock/internal.h"
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2022-04-25 15:30:14 +00:00
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#include "libc/sock/sock.h"
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2022-08-06 10:51:50 +00:00
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#include "libc/sock/struct/linger.h"
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2022-05-23 22:06:11 +00:00
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#include "libc/sock/syscall_fd.internal.h"
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2022-04-24 16:59:22 +00:00
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#include "libc/str/str.h"
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#include "libc/sysv/consts/so.h"
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#include "libc/sysv/consts/sol.h"
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2022-06-26 01:17:31 +00:00
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#include "libc/sysv/errfuns.h"
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Make improvements
- We now serialize the file descriptor table when spawning / executing
processes on Windows. This means you can now inherit more stuff than
just standard i/o. It's needed by bash, which duplicates the console
to file descriptor #255. We also now do a better job serializing the
environment variables, so you're less likely to encounter E2BIG when
using your bash shell. We also no longer coerce environ to uppercase
- execve() on Windows now remotely controls its parent process to make
them spawn a replacement for itself. Then it'll be able to terminate
immediately once the spawn succeeds, without having to linger around
for the lifetime as a shell process for proxying the exit code. When
process worker thread running in the parent sees the child die, it's
given a handle to the new child, to replace it in the process table.
- execve() and posix_spawn() on Windows will now provide CreateProcess
an explicit handle list. This allows us to remove handle locks which
enables better fork/spawn concurrency, with seriously correct thread
safety. Other codebases like Go use the same technique. On the other
hand fork() still favors the conventional WIN32 inheritence approach
which can be a little bit messy, but is *controlled* by guaranteeing
perfectly clean slates at both the spawning and execution boundaries
- sigset_t is now 64 bits. Having it be 128 bits was a mistake because
there's no reason to use that and it's only supported by FreeBSD. By
using the system word size, signal mask manipulation on Windows goes
very fast. Furthermore @asyncsignalsafe funcs have been rewritten on
Windows to take advantage of signal masking, now that it's much more
pleasant to use.
- All the overlapped i/o code on Windows has been rewritten for pretty
good signal and cancelation safety. We're now able to ensure overlap
data structures are cleaned up so long as you don't longjmp() out of
out of a signal handler that interrupted an i/o operation. Latencies
are also improved thanks to the removal of lots of "busy wait" code.
Waits should be optimal for everything except poll(), which shall be
the last and final demon we slay in the win32 i/o horror show.
- getrusage() on Windows is now able to report RUSAGE_CHILDREN as well
as RUSAGE_SELF, thanks to aggregation in the process manager thread.
2023-10-08 12:36:18 +00:00
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#ifdef __x86_64__
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2020-06-15 14:18:57 +00:00
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2023-07-30 11:26:34 +00:00
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__msabi extern typeof(__sys_getsockopt_nt) *const __imp_getsockopt;
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2021-02-04 03:35:29 +00:00
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textwindows int sys_getsockopt_nt(struct Fd *fd, int level, int optname,
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2022-04-24 16:59:22 +00:00
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void *out_opt_optval,
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uint32_t *inout_optlen) {
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uint64_t ms;
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uint32_t in_optlen;
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2022-04-25 15:30:14 +00:00
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struct linger_nt linger;
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2023-07-26 20:54:49 +00:00
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npassert(fd->kind == kFdSocket);
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2022-04-24 16:59:22 +00:00
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if (out_opt_optval && inout_optlen) {
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in_optlen = *inout_optlen;
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2020-06-15 14:18:57 +00:00
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} else {
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2022-04-24 16:59:22 +00:00
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in_optlen = 0;
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}
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2022-06-26 01:17:31 +00:00
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if (level == SOL_SOCKET &&
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(optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)) {
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if (in_optlen >= sizeof(struct timeval)) {
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if (optname == SO_RCVTIMEO) {
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Make improvements
- We now serialize the file descriptor table when spawning / executing
processes on Windows. This means you can now inherit more stuff than
just standard i/o. It's needed by bash, which duplicates the console
to file descriptor #255. We also now do a better job serializing the
environment variables, so you're less likely to encounter E2BIG when
using your bash shell. We also no longer coerce environ to uppercase
- execve() on Windows now remotely controls its parent process to make
them spawn a replacement for itself. Then it'll be able to terminate
immediately once the spawn succeeds, without having to linger around
for the lifetime as a shell process for proxying the exit code. When
process worker thread running in the parent sees the child die, it's
given a handle to the new child, to replace it in the process table.
- execve() and posix_spawn() on Windows will now provide CreateProcess
an explicit handle list. This allows us to remove handle locks which
enables better fork/spawn concurrency, with seriously correct thread
safety. Other codebases like Go use the same technique. On the other
hand fork() still favors the conventional WIN32 inheritence approach
which can be a little bit messy, but is *controlled* by guaranteeing
perfectly clean slates at both the spawning and execution boundaries
- sigset_t is now 64 bits. Having it be 128 bits was a mistake because
there's no reason to use that and it's only supported by FreeBSD. By
using the system word size, signal mask manipulation on Windows goes
very fast. Furthermore @asyncsignalsafe funcs have been rewritten on
Windows to take advantage of signal masking, now that it's much more
pleasant to use.
- All the overlapped i/o code on Windows has been rewritten for pretty
good signal and cancelation safety. We're now able to ensure overlap
data structures are cleaned up so long as you don't longjmp() out of
out of a signal handler that interrupted an i/o operation. Latencies
are also improved thanks to the removal of lots of "busy wait" code.
Waits should be optimal for everything except poll(), which shall be
the last and final demon we slay in the win32 i/o horror show.
- getrusage() on Windows is now able to report RUSAGE_CHILDREN as well
as RUSAGE_SELF, thanks to aggregation in the process manager thread.
2023-10-08 12:36:18 +00:00
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ms = fd->rcvtimeo;
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2022-06-26 01:17:31 +00:00
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} else {
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Make improvements
- We now serialize the file descriptor table when spawning / executing
processes on Windows. This means you can now inherit more stuff than
just standard i/o. It's needed by bash, which duplicates the console
to file descriptor #255. We also now do a better job serializing the
environment variables, so you're less likely to encounter E2BIG when
using your bash shell. We also no longer coerce environ to uppercase
- execve() on Windows now remotely controls its parent process to make
them spawn a replacement for itself. Then it'll be able to terminate
immediately once the spawn succeeds, without having to linger around
for the lifetime as a shell process for proxying the exit code. When
process worker thread running in the parent sees the child die, it's
given a handle to the new child, to replace it in the process table.
- execve() and posix_spawn() on Windows will now provide CreateProcess
an explicit handle list. This allows us to remove handle locks which
enables better fork/spawn concurrency, with seriously correct thread
safety. Other codebases like Go use the same technique. On the other
hand fork() still favors the conventional WIN32 inheritence approach
which can be a little bit messy, but is *controlled* by guaranteeing
perfectly clean slates at both the spawning and execution boundaries
- sigset_t is now 64 bits. Having it be 128 bits was a mistake because
there's no reason to use that and it's only supported by FreeBSD. By
using the system word size, signal mask manipulation on Windows goes
very fast. Furthermore @asyncsignalsafe funcs have been rewritten on
Windows to take advantage of signal masking, now that it's much more
pleasant to use.
- All the overlapped i/o code on Windows has been rewritten for pretty
good signal and cancelation safety. We're now able to ensure overlap
data structures are cleaned up so long as you don't longjmp() out of
out of a signal handler that interrupted an i/o operation. Latencies
are also improved thanks to the removal of lots of "busy wait" code.
Waits should be optimal for everything except poll(), which shall be
the last and final demon we slay in the win32 i/o horror show.
- getrusage() on Windows is now able to report RUSAGE_CHILDREN as well
as RUSAGE_SELF, thanks to aggregation in the process manager thread.
2023-10-08 12:36:18 +00:00
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ms = fd->sndtimeo;
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2022-06-26 01:17:31 +00:00
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}
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((struct timeval *)out_opt_optval)->tv_sec = ms / 1000;
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((struct timeval *)out_opt_optval)->tv_usec = ms % 1000 * 1000;
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*inout_optlen = sizeof(struct timeval);
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return 0;
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} else {
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return einval();
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}
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}
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2022-04-24 16:59:22 +00:00
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// TODO(jart): Use WSAIoctl?
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2023-07-30 11:26:34 +00:00
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if (__imp_getsockopt(fd->handle, level, optname, out_opt_optval,
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inout_optlen) == -1) {
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2020-11-28 20:01:51 +00:00
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return __winsockerr();
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2020-06-15 14:18:57 +00:00
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}
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2022-04-24 16:59:22 +00:00
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if (level == SOL_SOCKET) {
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2022-06-26 01:17:31 +00:00
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if (optname == SO_LINGER && in_optlen == sizeof(struct linger)) {
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2022-04-25 15:30:14 +00:00
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linger = *(struct linger_nt *)out_opt_optval;
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((struct linger *)out_opt_optval)->l_onoff = !!linger.l_onoff;
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((struct linger *)out_opt_optval)->l_linger = linger.l_linger;
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*inout_optlen = sizeof(struct linger);
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2022-04-24 16:59:22 +00:00
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}
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}
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if (in_optlen == 4 && *inout_optlen == 1) {
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// handle cases like this
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// getsockopt(8, SOL_TCP, TCP_FASTOPEN, [u"☺"], [1]) → 0
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int32_t wut = *(signed char *)out_opt_optval;
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memcpy(out_opt_optval, &wut, 4);
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*inout_optlen = 4;
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}
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return 0;
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2020-06-15 14:18:57 +00:00
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}
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Make improvements
- We now serialize the file descriptor table when spawning / executing
processes on Windows. This means you can now inherit more stuff than
just standard i/o. It's needed by bash, which duplicates the console
to file descriptor #255. We also now do a better job serializing the
environment variables, so you're less likely to encounter E2BIG when
using your bash shell. We also no longer coerce environ to uppercase
- execve() on Windows now remotely controls its parent process to make
them spawn a replacement for itself. Then it'll be able to terminate
immediately once the spawn succeeds, without having to linger around
for the lifetime as a shell process for proxying the exit code. When
process worker thread running in the parent sees the child die, it's
given a handle to the new child, to replace it in the process table.
- execve() and posix_spawn() on Windows will now provide CreateProcess
an explicit handle list. This allows us to remove handle locks which
enables better fork/spawn concurrency, with seriously correct thread
safety. Other codebases like Go use the same technique. On the other
hand fork() still favors the conventional WIN32 inheritence approach
which can be a little bit messy, but is *controlled* by guaranteeing
perfectly clean slates at both the spawning and execution boundaries
- sigset_t is now 64 bits. Having it be 128 bits was a mistake because
there's no reason to use that and it's only supported by FreeBSD. By
using the system word size, signal mask manipulation on Windows goes
very fast. Furthermore @asyncsignalsafe funcs have been rewritten on
Windows to take advantage of signal masking, now that it's much more
pleasant to use.
- All the overlapped i/o code on Windows has been rewritten for pretty
good signal and cancelation safety. We're now able to ensure overlap
data structures are cleaned up so long as you don't longjmp() out of
out of a signal handler that interrupted an i/o operation. Latencies
are also improved thanks to the removal of lots of "busy wait" code.
Waits should be optimal for everything except poll(), which shall be
the last and final demon we slay in the win32 i/o horror show.
- getrusage() on Windows is now able to report RUSAGE_CHILDREN as well
as RUSAGE_SELF, thanks to aggregation in the process manager thread.
2023-10-08 12:36:18 +00:00
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#endif /* __x86_64__ */
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