// Something wrong with socket(), fall back to checking the kernel version.
		major, minor := KernelVersion()
		if runtime.GOOS == "illumos" {
			return major > 5 || (major == 5 && minor >= 11) // minimal requirement is SunOS 5.11
		}
		return major > 11 || (major == 11 && minor >= 4)
	}
	return false
})

// SupportAccept4 tests whether accept4 system call is available.

// atomicwb performs a write barrier before an atomic pointer write.
// The caller should guard the call with "if writeBarrier.enabled".
//
// atomicwb should be an internal detail,
// but widely used packages access it using linkname.
// Notable members of the hall of shame include:
//   - github.com/bytedance/gopkg
//   - github.com/songzhibin97/gkit
//
// Do not remove or change the type signature.

	truth, ok := isTrue(indirectInterface(val))
	if !ok {
		s.errorf("if/with can't use %v", val)
	}
	if truth {
		if typ == parse.NodeWith {
			s.walk(val, list)
		} else {
			s.walk(dot, list)
		}
	} else if elseList != nil {
		s.walk(dot, elseList)
	}
}

// IsTrue reports whether the value is 'true', in the sense of not the zero of its type,

// to wbuf as well as marking it.
//
// The two shades and the condition work together to prevent a mutator
// from hiding an object from the garbage collector:
//
// 1. shade(*slot) prevents a mutator from hiding an object by moving
// the sole pointer to it from the heap to its stack. If it attempts
// to unlink an object from the heap, this will shade it.
//

};

// Creates a call to function `func` in region `caller_region`. Use `args` as
// the call arguments, and terminate the region with a yield. The arguments are
// cast to the required type before the call. `use_region_args` control whether
// the input arguments are used as is (for IfOp) or block arguments of the same
// type as the input arguments are created and then used as call arguments (for
// While).

// If all is set, print all goroutine stacks. Otherwise, print just the current goroutine.
// If crash is set, crash (core dump, etc) after tracebacking.
//
//go:nosplit
func gotraceback() (level int32, all, crash bool) {
	gp := getg()
	t := atomic.Load(&traceback_cache)
	crash = t&tracebackCrash != 0
	all = gp.m.throwing >= throwTypeUser || t&tracebackAll != 0
	if gp.m.traceback != 0 {
		level = int32(gp.m.traceback)

func FixMethodCall(call *ir.CallExpr) {
	if call.Fun.Op() != ir.ODOTMETH {
		return
	}

	dot := call.Fun.(*ir.SelectorExpr)

	fn := NewMethodExpr(dot.Pos(), dot.X.Type(), dot.Selection.Sym)

	args := make([]ir.Node, 1+len(call.Args))
	args[0] = dot.X
	copy(args[1:], call.Args)

	call.SetOp(ir.OCALLFUNC)
	call.Fun = fn
	call.Args = args
}

	fn funcInfo

	// pc is the program counter within fn.
	//
	// The meaning of this is subtle:
	//
	// - Typically, this frame performed a regular function call
	//   and this is the return PC (just after the CALL
	//   instruction). In this case, pc-1 reflects the CALL
	//   instruction itself and is the correct source of symbolic
	//   information.
	//
	// - If this frame "called" sigpanic, then pc is the

	callee := cs.Callee
	csflags := cs.Flags
	call := cs.Call

	// Start with the size-based score for the callee.
	score := int(callee.Inl.Cost)
	var tmask scoreAdjustTyp

	if debugTrace&debugTraceScoring != 0 {
		fmt.Fprintf(os.Stderr, "=-= scoring call to %s at %s , initial=%d\n",
			callee.Sym().Name, fmtFullPos(call.Pos()), score)
	}

		return nil
	}

	// Splice will loop writing maxSpliceSize bytes from the source to the pipe,
	// and then write those bytes from the pipe to the destination.
	// Set the pipe buffer size to maxSpliceSize to optimize that.
	// Ignore errors here, as a smaller buffer size will work,
	// although it will require more system calls.
	unix.Fcntl(fds[0], syscall.F_SETPIPE_SZ, maxSpliceSize)