1 files changed, 0 insertions, 483 deletions
diff --git a/contrib/go/_std_1.25/src/runtime/os_darwin.go b/contrib/go/_std_1.25/src/runtime/os_darwin.go
deleted file mode 100644
index 0c7144e9d0f..00000000000
--- a/contrib/go/_std_1.25/src/runtime/os_darwin.go
+++ /dev/null
@@ -1,483 +0,0 @@
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package runtime
-
-import (
-	"internal/abi"
-	"internal/stringslite"
-	"unsafe"
-)
-
-type mOS struct {
-	initialized bool
-	mutex       pthreadmutex
-	cond        pthreadcond
-	count       int
-}
-
-func unimplemented(name string) {
-	println(name, "not implemented")
-	*(*int)(unsafe.Pointer(uintptr(1231))) = 1231
-}
-
-//go:nosplit
-func semacreate(mp *m) {
-	if mp.initialized {
-		return
-	}
-	mp.initialized = true
-	if err := pthread_mutex_init(&mp.mutex, nil); err != 0 {
-		throw("pthread_mutex_init")
-	}
-	if err := pthread_cond_init(&mp.cond, nil); err != 0 {
-		throw("pthread_cond_init")
-	}
-}
-
-//go:nosplit
-func semasleep(ns int64) int32 {
-	var start int64
-	if ns >= 0 {
-		start = nanotime()
-	}
-	g := getg()
-	mp := g.m
-	if g == mp.gsignal {
-		// sema sleep/wakeup are implemented with pthreads, which are not async-signal-safe on Darwin.
-		throw("semasleep on Darwin signal stack")
-	}
-	pthread_mutex_lock(&mp.mutex)
-	for {
-		if mp.count > 0 {
-			mp.count--
-			pthread_mutex_unlock(&mp.mutex)
-			return 0
-		}
-		if ns >= 0 {
-			spent := nanotime() - start
-			if spent >= ns {
-				pthread_mutex_unlock(&mp.mutex)
-				return -1
-			}
-			var t timespec
-			t.setNsec(ns - spent)
-			err := pthread_cond_timedwait_relative_np(&mp.cond, &mp.mutex, &t)
-			if err == _ETIMEDOUT {
-				pthread_mutex_unlock(&mp.mutex)
-				return -1
-			}
-		} else {
-			pthread_cond_wait(&mp.cond, &mp.mutex)
-		}
-	}
-}
-
-//go:nosplit
-func semawakeup(mp *m) {
-	if g := getg(); g == g.m.gsignal {
-		throw("semawakeup on Darwin signal stack")
-	}
-	pthread_mutex_lock(&mp.mutex)
-	mp.count++
-	if mp.count > 0 {
-		pthread_cond_signal(&mp.cond)
-	}
-	pthread_mutex_unlock(&mp.mutex)
-}
-
-// The read and write file descriptors used by the sigNote functions.
-var sigNoteRead, sigNoteWrite int32
-
-// sigNoteSetup initializes a single, there-can-only-be-one, async-signal-safe note.
-//
-// The current implementation of notes on Darwin is not async-signal-safe,
-// because the functions pthread_mutex_lock, pthread_cond_signal, and
-// pthread_mutex_unlock, called by semawakeup, are not async-signal-safe.
-// There is only one case where we need to wake up a note from a signal
-// handler: the sigsend function. The signal handler code does not require
-// all the features of notes: it does not need to do a timed wait.
-// This is a separate implementation of notes, based on a pipe, that does
-// not support timed waits but is async-signal-safe.
-func sigNoteSetup(*note) {
-	if sigNoteRead != 0 || sigNoteWrite != 0 {
-		// Generalizing this would require avoiding the pipe-fork-closeonexec race, which entangles syscall.
-		throw("duplicate sigNoteSetup")
-	}
-	var errno int32
-	sigNoteRead, sigNoteWrite, errno = pipe()
-	if errno != 0 {
-		throw("pipe failed")
-	}
-	closeonexec(sigNoteRead)
-	closeonexec(sigNoteWrite)
-
-	// Make the write end of the pipe non-blocking, so that if the pipe
-	// buffer is somehow full we will not block in the signal handler.
-	// Leave the read end of the pipe blocking so that we will block
-	// in sigNoteSleep.
-	setNonblock(sigNoteWrite)
-}
-
-// sigNoteWakeup wakes up a thread sleeping on a note created by sigNoteSetup.
-func sigNoteWakeup(*note) {
-	var b byte
-	write(uintptr(sigNoteWrite), unsafe.Pointer(&b), 1)
-}
-
-// sigNoteSleep waits for a note created by sigNoteSetup to be woken.
-func sigNoteSleep(*note) {
-	for {
-		var b byte
-		entersyscallblock()
-		n := read(sigNoteRead, unsafe.Pointer(&b), 1)
-		exitsyscall()
-		if n != -_EINTR {
-			return
-		}
-	}
-}
-
-// BSD interface for threading.
-func osinit() {
-	// pthread_create delayed until end of goenvs so that we
-	// can look at the environment first.
-
-	numCPUStartup = getCPUCount()
-	physPageSize = getPageSize()
-
-	osinit_hack()
-}
-
-func sysctlbynameInt32(name []byte) (int32, int32) {
-	out := int32(0)
-	nout := unsafe.Sizeof(out)
-	ret := sysctlbyname(&name[0], (*byte)(unsafe.Pointer(&out)), &nout, nil, 0)
-	return ret, out
-}
-
-//go:linkname internal_cpu_getsysctlbyname internal/cpu.getsysctlbyname
-func internal_cpu_getsysctlbyname(name []byte) (int32, int32) {
-	return sysctlbynameInt32(name)
-}
-
-const (
-	_CTL_HW      = 6
-	_HW_NCPU     = 3
-	_HW_PAGESIZE = 7
-)
-
-func getCPUCount() int32 {
-	// Use sysctl to fetch hw.ncpu.
-	mib := [2]uint32{_CTL_HW, _HW_NCPU}
-	out := uint32(0)
-	nout := unsafe.Sizeof(out)
-	ret := sysctl(&mib[0], 2, (*byte)(unsafe.Pointer(&out)), &nout, nil, 0)
-	if ret >= 0 && int32(out) > 0 {
-		return int32(out)
-	}
-	return 1
-}
-
-func getPageSize() uintptr {
-	// Use sysctl to fetch hw.pagesize.
-	mib := [2]uint32{_CTL_HW, _HW_PAGESIZE}
-	out := uint32(0)
-	nout := unsafe.Sizeof(out)
-	ret := sysctl(&mib[0], 2, (*byte)(unsafe.Pointer(&out)), &nout, nil, 0)
-	if ret >= 0 && int32(out) > 0 {
-		return uintptr(out)
-	}
-	return 0
-}
-
-//go:nosplit
-func readRandom(r []byte) int {
-	arc4random_buf(unsafe.Pointer(&r[0]), int32(len(r)))
-	return len(r)
-}
-
-func goenvs() {
-	goenvs_unix()
-}
-
-// May run with m.p==nil, so write barriers are not allowed.
-//
-//go:nowritebarrierrec
-func newosproc(mp *m) {
-	stk := unsafe.Pointer(mp.g0.stack.hi)
-	if false {
-		print("newosproc stk=", stk, " m=", mp, " g=", mp.g0, " id=", mp.id, " ostk=", &mp, "\n")
-	}
-
-	// Initialize an attribute object.
-	var attr pthreadattr
-	var err int32
-	err = pthread_attr_init(&attr)
-	if err != 0 {
-		writeErrStr(failthreadcreate)
-		exit(1)
-	}
-
-	// Find out OS stack size for our own stack guard.
-	var stacksize uintptr
-	if pthread_attr_getstacksize(&attr, &stacksize) != 0 {
-		writeErrStr(failthreadcreate)
-		exit(1)
-	}
-	mp.g0.stack.hi = stacksize // for mstart
-
-	// Tell the pthread library we won't join with this thread.
-	if pthread_attr_setdetachstate(&attr, _PTHREAD_CREATE_DETACHED) != 0 {
-		writeErrStr(failthreadcreate)
-		exit(1)
-	}
-
-	// Finally, create the thread. It starts at mstart_stub, which does some low-level
-	// setup and then calls mstart.
-	var oset sigset
-	sigprocmask(_SIG_SETMASK, &sigset_all, &oset)
-	err = retryOnEAGAIN(func() int32 {
-		return pthread_create(&attr, abi.FuncPCABI0(mstart_stub), unsafe.Pointer(mp))
-	})
-	sigprocmask(_SIG_SETMASK, &oset, nil)
-	if err != 0 {
-		writeErrStr(failthreadcreate)
-		exit(1)
-	}
-}
-
-// glue code to call mstart from pthread_create.
-func mstart_stub()
-
-// newosproc0 is a version of newosproc that can be called before the runtime
-// is initialized.
-//
-// This function is not safe to use after initialization as it does not pass an M as fnarg.
-//
-//go:nosplit
-func newosproc0(stacksize uintptr, fn uintptr) {
-	// Initialize an attribute object.
-	var attr pthreadattr
-	var err int32
-	err = pthread_attr_init(&attr)
-	if err != 0 {
-		writeErrStr(failthreadcreate)
-		exit(1)
-	}
-
-	// The caller passes in a suggested stack size,
-	// from when we allocated the stack and thread ourselves,
-	// without libpthread. Now that we're using libpthread,
-	// we use the OS default stack size instead of the suggestion.
-	// Find out that stack size for our own stack guard.
-	if pthread_attr_getstacksize(&attr, &stacksize) != 0 {
-		writeErrStr(failthreadcreate)
-		exit(1)
-	}
-	g0.stack.hi = stacksize // for mstart
-	memstats.stacks_sys.add(int64(stacksize))
-
-	// Tell the pthread library we won't join with this thread.
-	if pthread_attr_setdetachstate(&attr, _PTHREAD_CREATE_DETACHED) != 0 {
-		writeErrStr(failthreadcreate)
-		exit(1)
-	}
-
-	// Finally, create the thread. It starts at mstart_stub, which does some low-level
-	// setup and then calls mstart.
-	var oset sigset
-	sigprocmask(_SIG_SETMASK, &sigset_all, &oset)
-	err = pthread_create(&attr, fn, nil)
-	sigprocmask(_SIG_SETMASK, &oset, nil)
-	if err != 0 {
-		writeErrStr(failthreadcreate)
-		exit(1)
-	}
-}
-
-// Called to do synchronous initialization of Go code built with
-// -buildmode=c-archive or -buildmode=c-shared.
-// None of the Go runtime is initialized.
-//
-//go:nosplit
-//go:nowritebarrierrec
-func libpreinit() {
-	initsig(true)
-}
-
-// Called to initialize a new m (including the bootstrap m).
-// Called on the parent thread (main thread in case of bootstrap), can allocate memory.
-func mpreinit(mp *m) {
-	mp.gsignal = malg(32 * 1024) // OS X wants >= 8K
-	mp.gsignal.m = mp
-	if GOOS == "darwin" && GOARCH == "arm64" {
-		// mlock the signal stack to work around a kernel bug where it may
-		// SIGILL when the signal stack is not faulted in while a signal
-		// arrives. See issue 42774.
-		mlock(unsafe.Pointer(mp.gsignal.stack.hi-physPageSize), physPageSize)
-	}
-}
-
-// Called to initialize a new m (including the bootstrap m).
-// Called on the new thread, cannot allocate memory.
-func minit() {
-	// iOS does not support alternate signal stack.
-	// The signal handler handles it directly.
-	if !(GOOS == "ios" && GOARCH == "arm64") {
-		minitSignalStack()
-	}
-	minitSignalMask()
-	getg().m.procid = uint64(pthread_self())
-}
-
-// Called from dropm to undo the effect of an minit.
-//
-//go:nosplit
-func unminit() {
-	// iOS does not support alternate signal stack.
-	// See minit.
-	if !(GOOS == "ios" && GOARCH == "arm64") {
-		unminitSignals()
-	}
-	getg().m.procid = 0
-}
-
-// Called from mexit, but not from dropm, to undo the effect of thread-owned
-// resources in minit, semacreate, or elsewhere. Do not take locks after calling this.
-//
-// This always runs without a P, so //go:nowritebarrierrec is required.
-//
-//go:nowritebarrierrec
-func mdestroy(mp *m) {
-}
-
-//go:nosplit
-func osyield_no_g() {
-	usleep_no_g(1)
-}
-
-//go:nosplit
-func osyield() {
-	usleep(1)
-}
-
-const (
-	_NSIG        = 32
-	_SI_USER     = 0 /* empirically true, but not what headers say */
-	_SIG_BLOCK   = 1
-	_SIG_UNBLOCK = 2
-	_SIG_SETMASK = 3
-	_SS_DISABLE  = 4
-)
-
-//extern SigTabTT runtime·sigtab[];
-
-type sigset uint32
-
-var sigset_all = ^sigset(0)
-
-//go:nosplit
-//go:nowritebarrierrec
-func setsig(i uint32, fn uintptr) {
-	var sa usigactiont
-	sa.sa_flags = _SA_SIGINFO | _SA_ONSTACK | _SA_RESTART
-	sa.sa_mask = ^uint32(0)
-	if fn == abi.FuncPCABIInternal(sighandler) { // abi.FuncPCABIInternal(sighandler) matches the callers in signal_unix.go
-		if iscgo {
-			fn = abi.FuncPCABI0(cgoSigtramp)
-		} else {
-			fn = abi.FuncPCABI0(sigtramp)
-		}
-	}
-	*(*uintptr)(unsafe.Pointer(&sa.__sigaction_u)) = fn
-	sigaction(i, &sa, nil)
-}
-
-// sigtramp is the callback from libc when a signal is received.
-// It is called with the C calling convention.
-func sigtramp()
-func cgoSigtramp()
-
-//go:nosplit
-//go:nowritebarrierrec
-func setsigstack(i uint32) {
-	var osa usigactiont
-	sigaction(i, nil, &osa)
-	handler := *(*uintptr)(unsafe.Pointer(&osa.__sigaction_u))
-	if osa.sa_flags&_SA_ONSTACK != 0 {
-		return
-	}
-	var sa usigactiont
-	*(*uintptr)(unsafe.Pointer(&sa.__sigaction_u)) = handler
-	sa.sa_mask = osa.sa_mask
-	sa.sa_flags = osa.sa_flags | _SA_ONSTACK
-	sigaction(i, &sa, nil)
-}
-
-//go:nosplit
-//go:nowritebarrierrec
-func getsig(i uint32) uintptr {
-	var sa usigactiont
-	sigaction(i, nil, &sa)
-	return *(*uintptr)(unsafe.Pointer(&sa.__sigaction_u))
-}
-
-// setSignalstackSP sets the ss_sp field of a stackt.
-//
-//go:nosplit
-func setSignalstackSP(s *stackt, sp uintptr) {
-	*(*uintptr)(unsafe.Pointer(&s.ss_sp)) = sp
-}
-
-//go:nosplit
-//go:nowritebarrierrec
-func sigaddset(mask *sigset, i int) {
-	*mask |= 1 << (uint32(i) - 1)
-}
-
-func sigdelset(mask *sigset, i int) {
-	*mask &^= 1 << (uint32(i) - 1)
-}
-
-func setProcessCPUProfiler(hz int32) {
-	setProcessCPUProfilerTimer(hz)
-}
-
-func setThreadCPUProfiler(hz int32) {
-	setThreadCPUProfilerHz(hz)
-}
-
-//go:nosplit
-func validSIGPROF(mp *m, c *sigctxt) bool {
-	return true
-}
-
-//go:linkname executablePath os.executablePath
-var executablePath string
-
-func sysargs(argc int32, argv **byte) {
-	// skip over argv, envv and the first string will be the path
-	n := argc + 1
-	for argv_index(argv, n) != nil {
-		n++
-	}
-	executablePath = gostringnocopy(argv_index(argv, n+1))
-
-	// strip "executable_path=" prefix if available, it's added after OS X 10.11.
-	executablePath = stringslite.TrimPrefix(executablePath, "executable_path=")
-}
-
-func signalM(mp *m, sig int) {
-	pthread_kill(pthread(mp.procid), uint32(sig))
-}
-
-// sigPerThreadSyscall is only used on linux, so we assign a bogus signal
-// number.
-const sigPerThreadSyscall = 1 << 31
-
-//go:nosplit
-func runPerThreadSyscall() {
-	throw("runPerThreadSyscall only valid on linux")
-}