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/describentfileflagattr.c

@@ -0,0 +1,58 @@
+/*-*- 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/intrin/describeflags.internal.h"
+#include "libc/intrin/kprintf.h"
+#include "libc/macros.internal.h"
+#include "libc/nt/enum/fileflagandattributes.h"
+#include "libc/runtime/runtime.h"
+
+static const struct DescribeFlags kFileFlags[] = {
+    {kNtFileAttributeReadonly, "AttributeReadonly"},                    //
+    {kNtFileAttributeHidden, "AttributeHidden"},                        //
+    {kNtFileAttributeSystem, "AttributeSystem"},                        //
+    {kNtFileAttributeVolumelabel, "AttributeVolumelabel"},              //
+    {kNtFileAttributeDirectory, "AttributeDirectory"},                  //
+    {kNtFileAttributeArchive, "AttributeArchive"},                      //
+    {kNtFileAttributeDevice, "AttributeDevice"},                        //
+    {kNtFileAttributeNormal, "AttributeNormal"},                        //
+    {kNtFileAttributeTemporary, "AttributeTemporary"},                  //
+    {kNtFileAttributeSparseFile, "AttributeSparseFile"},                //
+    {kNtFileAttributeReparsePoint, "AttributeReparsePoint"},            //
+    {kNtFileAttributeCompressed, "AttributeCompressed"},                //
+    {kNtFileAttributeOffline, "AttributeOffline"},                      //
+    {kNtFileAttributeNotContentIndexed, "AttributeNotContentIndexed"},  //
+    {kNtFileAttributeEncrypted, "AttributeEncrypted"},                  //
+    {kNtFileFlagWriteThrough, "FlagWriteThrough"},                      //
+    {kNtFileFlagOverlapped, "FlagOverlapped"},                          //
+    {kNtFileFlagNoBuffering, "FlagNoBuffering"},                        //
+    {kNtFileFlagRandomAccess, "FlagRandomAccess"},                      //
+    {kNtFileFlagSequentialScan, "FlagSequentialScan"},                  //
+    {kNtFileFlagDeleteOnClose, "FlagDeleteOnClose"},                    //
+    {kNtFileFlagBackupSemantics, "FlagBackupSemantics"},                //
+    {kNtFileFlagPosixSemantics, "FlagPosixSemantics"},                  //
+    {kNtFileFlagOpenReparsePoint, "FlagOpenReparsePoint"},              //
+    {kNtFileFlagOpenNoRecall, "FlagOpenNoRecall"},                      //
+    {kNtFileFlagFirstPipeInstance, "FlagFirstPipeInstance"},            //
+};
+
+const char *(DescribeNtFileFlagAttr)(char buf[256], uint32_t x) {
+  if (x == -1u) return "-1u";
+  return DescribeFlags(buf, 256, kFileFlags, ARRAYLEN(kFileFlags), "kNtFile",
+                       x);
+}