semaMutexProfile
)

// Called from runtime.
func semacquire(addr *uint32) {
	semacquire1(addr, false, 0, 0, waitReasonSemacquire)
}

func semacquire1(addr *uint32, lifo bool, profile semaProfileFlags, skipframes int, reason waitReason) {
	gp := getg()
	if gp != gp.m.curg {
		throw("semacquire not on the G stack")
	}

	// Easy case.
	if cansemacquire(addr) {
		return
	}

		return errorString("tracing is already enabled")
	}
	// Block until cleanup of the last trace is done.
	semacquire(&traceShutdownSema)
	semrelease(&traceShutdownSema)

	// Hold traceAdvanceSema across trace start, since we'll want it on
	// the other side of tracing being enabled globally.
	semacquire(&traceAdvanceSema)

	// Initialize CPU profile -> trace ingestion.
	traceInitReadCPU()

	waitReasonFinalizerWait                           // "finalizer wait"
	waitReasonForceGCIdle                             // "force gc (idle)"
	waitReasonSemacquire                              // "semacquire"
	waitReasonSleep                                   // "sleep"
	waitReasonSyncCondWait                            // "sync.Cond.Wait"
	waitReasonSyncMutexLock                           // "sync.Mutex.Lock"

				"runtime.semrelease1",
				"runtime_test.TestRuntimeLockMetricsAndProfile.func6.1",
				"runtime_test.(*contentionWorker).run",
			},
			{
				"runtime.unlock",
				"runtime.semacquire1",
				"runtime.semacquire",
				"runtime_test.TestRuntimeLockMetricsAndProfile.func6.1",
				"runtime_test.(*contentionWorker).run",
			},
		}

var Lock = lock
var Unlock = unlock

var MutexContended = mutexContended

func SemRootLock(addr *uint32) *mutex {
	root := semtable.rootFor(addr)
	return &root.lock
}

var Semacquire = semacquire
var Semrelease1 = semrelease1

func SemNwait(addr *uint32) uint32 {
	root := semtable.rootFor(addr)
	return root.nwait.Load()
}

const SemTableSize = semTabSize

                }
            }
        }

        then:
        instant.worker1Finished > instant.unlocked
    }

    def "releases worker lease when replacing locks and need to block to reacquire an old lock"() {
        def registry = workerLeaseService(1)
        def resource1 = resourceLock("one")
        def resource2 = resourceLock("two")

        when:
        async {
            start {

	}

	wbuf.nobj--
	return wbuf.obj[wbuf.nobj]
}

// dispose returns any cached pointers to the global queue.
// The buffers are being put on the full queue so that the
// write barriers will not simply reacquire them before the
// GC can inspect them. This helps reduce the mutator's
// ability to hide pointers during the concurrent mark phase.
//
//go:nowritebarrierrec
func (w *gcWork) dispose() {

            assert lockIsHeld(taskLease)
            assert lockIsHeld(projectLock)
        }
        !lockIsHeld(taskLease)
        !lockIsHeld(projectLock)
    }

    def "can release and reacquire project lock while holding task execution lease"() {
        def workerLeaseService = workerLeaseService(false)
        def taskLease = workerLeaseService.getTaskExecutionLock(path("build"), path("project"))

}

func metricsLock() {
	// Acquire the metricsSema but with handoff. Operations are typically
	// expensive enough that queueing up goroutines and handing off between
	// them will be noticeably better-behaved.
	semacquire1(&metricsSema, true, 0, 0, waitReasonSemacquire)
	if raceenabled {
		raceacquire(unsafe.Pointer(&metricsSema))
	}
}

func metricsUnlock() {
	if raceenabled {
		racerelease(unsafe.Pointer(&metricsSema))
	}

// true in the following cases:
// - The goroutine lost its P, it ran some other code, and then got it back. It's now running with that P.
// - The goroutine lost its P and was unable to reacquire it, and is now running without a P.
// - The goroutine lost its P and acquired a different one, and is now running with that P.
func (tl traceLocker) GoSysExit(lostP bool) {
	ev := traceEvGoSyscallEnd