Make fixes and improvements

- Introduce __assert_disable global
- Improve strsignal() thread safety
- Make system call tracing thread safe
- Fix SO_RCVTIMEO / SO_SNDTIMEO on Windows
- Refactor DescribeFoo() functions into one place
- Fix fork() on Windows when TLS and MAP_STACK exist
- Round upwards in setsockopt(SO_RCVTIMEO) on Windows
- Disable futexes on OpenBSD which seem extremely broken
- Implement a better kludge for monotonic time on Windows

libc/intrin/wsarecvfrom.c

@@ -0,0 +1,71 @@
+/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
+│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
+╞══════════════════════════════════════════════════════════════════════════════╡
+│ Copyright 2022 Justine Alexandra Roberts Tunney                              │
+│                                                                              │
+│ Permission to use, copy, modify, and/or distribute this software for         │
+│ any purpose with or without fee is hereby granted, provided that the         │
+│ above copyright notice and this permission notice appear in all copies.      │
+│                                                                              │
+│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
+│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
+│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
+│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
+│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
+│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
+│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
+│ PERFORMANCE OF THIS SOFTWARE.                                                │
+╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/calls/strace.internal.h"
+#include "libc/calls/syscall_support-nt.internal.h"
+#include "libc/intrin/describeflags.internal.h"
+#include "libc/intrin/kprintf.h"
+#include "libc/nt/thunk/msabi.h"
+#include "libc/nt/winsock.h"
+
+__msabi extern typeof(WSARecvFrom) *const __imp_WSARecvFrom;
+
+/**
+ * Receives data from Windows socket.
+ *
+ * @return 0 on success, or -1 on failure
+ * @note this wrapper takes care of ABI, STRACE(), and __winerr()
+ */
+textwindows int WSARecvFrom(
+    uint64_t s, const struct NtIovec *inout_lpBuffers, uint32_t dwBufferCount,
+    uint32_t *opt_out_lpNumberOfBytesRecvd, uint32_t *inout_lpFlags,
+    void *opt_out_fromsockaddr, uint32_t *opt_inout_fromsockaddrlen,
+    struct NtOverlapped *opt_inout_lpOverlapped,
+    const NtWsaOverlappedCompletionRoutine opt_lpCompletionRoutine) {
+  int rc;
+#if defined(SYSDEBUG) && _NTTRACE
+  uint32_t NumberOfBytesRecvd;
+  if (opt_out_lpNumberOfBytesRecvd) {
+    NumberOfBytesRecvd = *opt_out_lpNumberOfBytesRecvd;
+  }
+  rc = __imp_WSARecvFrom(s, inout_lpBuffers, dwBufferCount, &NumberOfBytesRecvd,
+                         inout_lpFlags, opt_out_fromsockaddr,
+                         opt_inout_fromsockaddrlen, opt_inout_lpOverlapped,
+                         opt_lpCompletionRoutine);
+  if (opt_out_lpNumberOfBytesRecvd) {
+    *opt_out_lpNumberOfBytesRecvd = NumberOfBytesRecvd;
+  }
+  if (rc == -1) {
+    __winerr();
+  }
+  if (UNLIKELY(__strace > 0)) {
+    kprintf(STRACE_PROLOGUE "WSARecvFrom(%lu, [", s);
+    DescribeIovNt(inout_lpBuffers, dwBufferCount,
+                  rc != -1 ? NumberOfBytesRecvd : 0);
+    kprintf("], %u, [%'u], %p, %p, %p, %p, %p) → %d% lm\n", dwBufferCount,
+            NumberOfBytesRecvd, opt_out_fromsockaddr, opt_inout_fromsockaddrlen,
+            inout_lpFlags, opt_inout_lpOverlapped, opt_lpCompletionRoutine, rc);
+  }
+#else
+  rc = __imp_WSARecvFrom(s, inout_lpBuffers, dwBufferCount,
+                         opt_out_lpNumberOfBytesRecvd, opt_out_fromsockaddr,
+                         opt_inout_fromsockaddrlen, inout_lpFlags,
+                         opt_inout_lpOverlapped, opt_lpCompletionRoutine);
+#endif
+  return rc;
+}