Make improvements

- Improve compatibility with Blink virtual machine
- Add non-POSIX APIs for joining threads and signal masks
- Never ever use anything except 32-bit integers for atomics
- Add some `#undef` statements to workaround `ctags` problems

libc/calls/clock_nanosleep.c

@@ -240,6 +240,8 @@ static bool ShouldUseSpinNanosleep(int clock, int flags,
 errno_t clock_nanosleep(int clock, int flags, const struct timespec *req,
                         struct timespec *rem) {
   int rc;
+  LOCKTRACE("clock_nanosleep(%s, %s, %s) → ...", DescribeClockName(clock),
+            DescribeSleepFlags(flags), DescribeTimespec(0, req));
   if (IsMetal()) {
     rc = ENOSYS;
   } else if (!req || (IsAsan() && (!__asan_is_valid_timespec(req) ||
@@ -259,7 +261,7 @@ errno_t clock_nanosleep(int clock, int flags, const struct timespec *req,
   if (__tls_enabled && !(__get_tls()->tib_flags & TIB_FLAG_TIME_CRITICAL)) {
     STRACE("clock_nanosleep(%s, %s, %s, [%s]) → %s", DescribeClockName(clock),
            DescribeSleepFlags(flags), DescribeTimespec(0, req),
-           DescribeTimespec(rc, rem), DescribeErrnoResult(rc));
+           DescribeTimespec(rc, rem), DescribeErrno(rc));
   }
 #endif
   return rc;

libc/calls/clock_nanosleep_latency.c

@@ -1,25 +0,0 @@
-/*-*- 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/assert.h"
-#include "libc/calls/blockcancel.internal.h"
-#include "libc/calls/calls.h"
-#include "libc/calls/clock_gettime.internal.h"
-#include "libc/errno.h"
-#include "libc/macros.internal.h"
-#include "libc/sysv/consts/clock.h"

libc/calls/fexecve.c

@@ -26,8 +26,6 @@
 #include "libc/str/str.h"
 #include "libc/sysv/errfuns.h"
 
-int sys_fexecve(int, char *const[], char *const[]);
-
 /**
  * Executes binary executable at file descriptor.
  *

libc/calls/pledge.c

@@ -24,6 +24,7 @@
 #include "libc/errno.h"
 #include "libc/intrin/promises.internal.h"
 #include "libc/intrin/strace.internal.h"
+#include "libc/nexgen32e/vendor.internal.h"
 #include "libc/runtime/runtime.h"
 #include "libc/sysv/errfuns.h"
 
@@ -238,8 +239,10 @@
 int pledge(const char *promises, const char *execpromises) {
   int e, rc;
   unsigned long ipromises, iexecpromises;
-  if (!ParsePromises(promises, &ipromises) &&
-      !ParsePromises(execpromises, &iexecpromises)) {
+  if (IsGenuineCosmo()) {
+    rc = 0;  // blink doesn't support seccomp
+  } else if (!ParsePromises(promises, &ipromises) &&
+             !ParsePromises(execpromises, &iexecpromises)) {
     if (IsLinux()) {
       // copy exec and execnative from promises to execpromises
       iexecpromises = ~(~iexecpromises | (~ipromises & (1ul << PROMISE_EXEC)));

libc/calls/syscall-sysv.internal.h

@@ -37,6 +37,7 @@ i32 sys_dup(i32) _Hide;
 i32 sys_dup2(i32, i32) _Hide;
 i32 sys_dup3(i32, i32, i32) _Hide;
 i32 sys_execve(const char *, char *const[], char *const[]) _Hide;
+i32 sys_execveat(i32, const char *, char *const[], char *const[], i32) _Hide;
 i32 sys_faccessat(i32, const char *, i32, u32) _Hide;
 i32 sys_faccessat2(i32, const char *, i32, u32) _Hide;
 i32 sys_fadvise(i32, i64, i64, i32) _Hide;
@@ -47,6 +48,7 @@ i32 sys_fchown(i64, u32, u32) _Hide;
 i32 sys_fchownat(i32, const char *, u32, u32, u32) _Hide;
 i32 sys_fcntl(i32, i32, u64, i32 (*)(i32, i32, ...)) _Hide;
 i32 sys_fdatasync(i32) _Hide;
+i32 sys_fexecve(i32, char *const[], char *const[]) _Hide;
 i32 sys_flock(i32, i32) _Hide;
 i32 sys_fork(void) _Hide;
 i32 sys_fsync(i32) _Hide;

libc/calls/unveil.c

@@ -31,6 +31,7 @@
 #include "libc/fmt/conv.h"
 #include "libc/intrin/strace.internal.h"
 #include "libc/macros.internal.h"
+#include "libc/nexgen32e/vendor.internal.h"
 #include "libc/runtime/internal.h"
 #include "libc/runtime/runtime.h"
 #include "libc/runtime/stack.h"
@@ -353,7 +354,9 @@ int sys_unveil_linux(const char *path, const char *permissions) {
 int unveil(const char *path, const char *permissions) {
   int e, rc;
   e = errno;
-  if (IsLinux()) {
+  if (IsGenuineCosmo()) {
+    rc = 0;  // blink doesn't support landlock
+  } else if (IsLinux()) {
     rc = sys_unveil_linux(path, permissions);
   } else {
     rc = sys_unveil(path, permissions);