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/describentfileaccessflags.c

@@ -0,0 +1,69 @@
+/*-*- 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/macros.internal.h"
+#include "libc/nt/enum/accessmask.h"
+#include "libc/nt/enum/filesharemode.h"
+
+static const struct DescribeFlags kFileAccessflags[] = {
+    {kNtFileAllAccess, "FileAllAccess"},                    // order matters
+    {kNtFileGenericRead, "FileGenericRead"},                // order matters
+    {kNtFileGenericWrite, "FileGenericWrite"},              // order matters
+    {kNtFileGenericExecute, "FileGenericExecute"},          // order matters
+    {kNtGenericRead, "GenericRead"},                        //
+    {kNtGenericWrite, "GenericWrite"},                      //
+    {kNtGenericExecute, "GenericExecute"},                  //
+    {kNtGenericAll, "GenericAll"},                          //
+    {kNtDelete, "Delete"},                                  //
+    {kNtReadControl, "ReadControl"},                        //
+    {kNtWriteDac, "WriteDac"},                              //
+    {kNtWriteOwner, "WriteOwner"},                          //
+    {kNtSynchronize, "Synchronize"},                        //
+    {kNtStandardRightsRequired, "StandardRightsRequired"},  //
+    {kNtAccessSystemSecurity, "AccessSystemSecurity"},      //
+    {kNtMaximumAllowed, "MaximumAllowed"},                  //
+    {kNtFileReadData, "FileReadData"},                      //
+    {kNtFileListDirectory, "FileListDirectory"},            //
+    {kNtFileWriteData, "FileWriteData"},                    //
+    {kNtFileAddFile, "FileAddFile"},                        //
+    {kNtFileAppendData, "FileAppendData"},                  //
+    {kNtFileAddSubdirectory, "FileAddSubdirectory"},        //
+    {kNtFileCreatePipeInstance, "FileCreatePipeInstance"},  //
+    {kNtFileReadEa, "FileReadEa"},                          //
+    {kNtFileWriteEa, "FileWriteEa"},                        //
+    {kNtFileExecute, "FileExecute"},                        //
+    {kNtFileTraverse, "FileTraverse"},                      //
+    {kNtFileDeleteChild, "FileDeleteChild"},                //
+    {kNtFileReadAttributes, "FileReadAttributes"},          //
+    {kNtFileWriteAttributes, "FileWriteAttributes"},        //
+    {kNtTokenAssignPrimary, "TokenAssignPrimary"},          //
+    {kNtTokenDuplicate, "TokenDuplicate"},                  //
+    {kNtTokenImpersonate, "TokenImpersonate"},              //
+    {kNtTokenQuery, "TokenQuery"},                          //
+    {kNtTokenQuerySource, "TokenQuerySource"},              //
+    {kNtTokenAdjustPrivileges, "TokenAdjustPrivileges"},    //
+    {kNtTokenAdjustGroups, "TokenAdjustGroups"},            //
+    {kNtTokenAdjustDefault, "TokenAdjustDefault"},          //
+    {kNtTokenAdjustSessionid, "TokenAdjustSessionid"},      //
+};
+
+const char *(DescribeNtFileAccessFlags)(char buf[512], uint32_t x) {
+  return DescribeFlags(buf, 512, kFileAccessflags, ARRAYLEN(kFileAccessflags),
+                       "kNt", x);
+}