//
// nosplit because it's called on the syscall path when stack movement is forbidden.
//
//go:nosplit
func (tl traceLocker) ok() bool {
	return tl.gen != 0
}

// traceRelease indicates that this M is done writing trace events.
//
// nosplit because it's called on the syscall path when stack movement is forbidden.
//
//go:nosplit
func traceRelease(tl traceLocker) {

	EvGoUnblock           // goroutine is unblocked [timestamp, goroutine ID, goroutine seq, stack ID]
	EvGoSyscallBegin      // syscall enter [timestamp, P seq, stack ID]
	EvGoSyscallEnd        // syscall exit [timestamp]
	EvGoSyscallEndBlocked // syscall exit and it blocked at some point [timestamp]
	EvGoStatus            // goroutine status at the start of a generation [timestamp, goroutine ID, thread ID, status]

		}
	}

	# Determine which form to use; pad args with zeros.
	my $asm = "Syscall";
	if ($nonblock) {
		if ($errvar eq "" && $ENV{'GOOS'} eq "linux") {
			$asm = "rawSyscallNoError";
		} else {
			$asm = "RawSyscall";
		}
	}
	if ($libc) {
		# Call unexported syscall functions (which take
		# libc functions instead of syscall numbers).
		$asm = lcfirst($asm);
	}
	if(@args <= 3) {
		while(@args < 3) {

// A very simplified example showing where KeepAlive is required:
//
//	type File struct { d int }
//	d, err := syscall.Open("/file/path", syscall.O_RDONLY, 0)
//	// ... do something if err != nil ...
//	p := &File{d}
//	runtime.SetFinalizer(p, func(p *File) { syscall.Close(p.d) })
//	var buf [10]byte
//	n, err := syscall.Read(p.d, buf[:])
//	// Ensure p is not finalized until Read returns.
//	runtime.KeepAlive(p)

		// Look for the next event for the same G to determine if the syscall
		// blocked.
		blocked := false
		it.events.All()(func(nev *oldtrace.Event) bool {
			if nev.G != ev.G {
				return true
			}
			// After an EvGoSysCall, the next event on the same G will either be
			// EvGoSysBlock to denote a blocking syscall, or some other event
			// (or the end of the trace) if the syscall didn't block.
			if nev.Type == oldtrace.EvGoSysBlock {

		<td> <a href="/block?name={{.Name}}">graph</a> <a href="/block?name={{.Name}}&raw=1" download="block.profile">(download)</a></td>
	</tr>
	<tr>
		<td>Syscall profile:</td>
		<td> <a href="/syscall?name={{.Name}}">graph</a> <a href="/syscall?name={{.Name}}&raw=1" download="syscall.profile">(download)</a></td>
		</tr>
	<tr>
		<td>Scheduler wait profile:</td>

		timeSleep(1_000_000)
	}
	return r
}

var envs []string
var argslice []string

//go:linkname syscall_runtime_envs syscall.runtime_envs
func syscall_runtime_envs() []string { return append([]string{}, envs...) }

//go:linkname syscall_Getpagesize syscall.Getpagesize
func syscall_Getpagesize() int { return int(physPageSize) }

//go:linkname os_runtime_args os.runtime_args

// Note that sometimes we use a lowercase //sys name and wrap
// it in our own nicer implementation, either here or in
// syscall_bsd.go or syscall_unix.go.

package syscall

import (
	"internal/abi"
	"unsafe"
)

func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)

				if g.lastRunnableTime != 0 {
					g.SchedWaitTime += ev.Time().Sub(g.lastRunnableTime)
					g.lastRunnableTime = 0
				}
			case GoSyscall:
				// Record syscall execution time and syscall block time as we transition out of syscall.
				if g.lastSyscallTime != 0 {
					if g.lastSyscallBlockTime != 0 {
						g.SyscallBlockTime += ev.Time().Sub(g.lastSyscallBlockTime)

Go 1.7 does not require the binary argument.

Supported profile types are:
    - net: network blocking profile
    - sync: synchronization blocking profile
    - syscall: syscall blocking profile
    - sched: scheduler latency profile

Flags:
	-http=addr: HTTP service address (e.g., ':6060')
	-pprof=type: print a pprof-like profile instead