break
			}

			// We stopped the G, so we have to ready it later.
			stopped = true

			s = _Gwaiting
			fallthrough

		case _Grunnable, _Gsyscall, _Gwaiting:
			// Claim goroutine by setting scan bit.
			// This may race with execution or readying of gp.
			// The scan bit keeps it from transition state.
			if !castogscanstatus(gp, s, s|_Gscan) {
				break

		printCgoTraceback(&cgoCallers)
	}

	if readgstatus(gp)&^_Gscan == _Gsyscall {
		// Override registers if blocked in system call.
		pc = gp.syscallpc
		sp = gp.syscallsp
		flags &^= unwindTrap
	}
	if gp.m != nil && gp.m.vdsoSP != 0 {
		// Override registers if running in VDSO. This comes after the
		// _Gsyscall check to cover VDSO calls after entersyscall.
		pc = gp.m.vdsoPC
		sp = gp.m.vdsoSP

	// may transition the P to _Pidle (if it has no more work to
	// do), _Psyscall (when entering a syscall), or _Pgcstop (to
	// halt for the GC). The M may also hand ownership of the P
	// off directly to another M (e.g., to schedule a locked G).
	_Prunning

	// _Psyscall means a P is not running user code. It has
	// affinity to an M in a syscall but is not owned by it and
	// may be stolen by another M. This is similar to _Pidle but

	tl.eventWriter(traceGoSyscall, procStatus).commit(ev)
}

// ProcSteal indicates that our current M stole a P from another M.
//
// inSyscall indicates that we're stealing the P from a syscall context.
//
// The caller must have ownership of pp.
func (tl traceLocker) ProcSteal(pp *p, inSyscall bool) {
	// Grab the M ID we stole from.
	mStolenFrom := pp.trace.mSyscallID
	pp.trace.mSyscallID = -1

	pp.m = 0
	gp.m.oldp.set(pp)
	gp.m.p = 0
	atomic.Store(&pp.status, _Psyscall)
	if sched.gcwaiting.Load() {
		systemstack(entersyscall_gcwait)
		save(pc, sp, bp)
	}

	gp.m.locks--
}

// Standard syscall entry used by the go syscall library and normal cgo calls.
//
// This is exported via linkname to assembly in the syscall package and x/sys.
//

		// remember when we've first observed the G blocked
		// needed only to output in traceback
		status := readgstatus(gp) // We are not in a scan state
		if (status == _Gwaiting || status == _Gsyscall) && gp.waitsince == 0 {
			gp.waitsince = work.tstart
		}

		// scanstack must be done on the system stack in case
		// we're trying to scan our own stack.
		systemstack(func() {

	// complete.
	//
	// TODO(austin): We may not need this if preemption were more
	// tightly synchronized on the G/P status and preemption
	// blocked transition into _Gsyscall/_Psyscall.
	preemptExtLock uint32
}

// Stubs so tests can link correctly. These should never be called.
func open(name *byte, mode, perm int32) int32 {
	throw("unimplemented")
	return -1
}

		}
	}

	# 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) {

// Copyright 2023 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.

// Tests syscall P stealing from a goroutine and thread
// that have been in a syscall the entire generation.

package main

import (
	"internal/trace"
	"internal/trace/event/go122"
	testgen "internal/trace/internal/testgen/go122"
)

func main() {
	testgen.Main(gen)
}

		}
		// Write down that we've entered a syscall. Note: we might have no P here
		// if we're in a cgo callback or this is a transition from GoUndetermined
		// (i.e. the G has been blocked in a syscall).
		gs.syscallBegin(start, ev.Proc(), ev.Stack())
		g.inSyscall[ev.Proc()] = gs
	}
	// Check if we're exiting a non-blocking syscall.
	_, didNotBlock := g.inSyscall[ev.Proc()]
	if from == trace.GoSyscall && didNotBlock {